Centrifugal pump

Abstract

The utility model provides a centrifugal pump, and belongs to the technical field of water pumps. The problem that the service life of a mechanical seal in the prior art is not long enough is solved. The water pump comprises a water pump body, a water pump cover and a bearing box, a water outlet and a water inlet are respectively formed in the water pump body, a water pump shaft is connected in the bearing box, the water pump shaft penetrates through the water pump cover and extends into the water pump body, and a mechanical seal is fixedly sleeved on the water pump shaft at the outer end part of the water pump cover. A first pipeline hole is formed in the upper end of the mechanical seal, a through hole is formed in the inner end of the first pipeline hole, a connecting groove is formed in the position, at the end of the pipeline hole, of the surface of the mechanical seal, and a first conveying pipe connector is fixedly connected into the connecting groove. A second pipeline hole is formed in the inner wall of the water inlet and penetrates through the pipeline connector, a second conveying pipe connector is fixedly installed outside the pipeline connector, and a conveying pipeline is fixedly connected between the first conveying pipe connector and the second conveying pipe connector. The water pump has the advantages that the mechanical seal is not easy to damage, and the rigidity of the water pump body is stronger.

Description

Technical Field

[0001] This utility model belongs to the field of water pump technology and relates to a centrifugal pump. Background Technology

[0002] Centrifugal pumps, with their advantages of simple structure, convenient operation, and wide range of flow and head, have become an indispensable liquid conveying equipment in modern industry and daily life.

[0003] Chinese patent publication number CN207145258U discloses a mechanically sealed centrifugal pump, including a base, a sealing ring, a pump cover, a motor front cover, a motor, a junction box, an outlet pipe, an inlet pipe, and a pump casing. The junction box is located on the top of the motor and is welded to the motor. The motor front cover is located on the right side of the motor and is fixedly connected to the motor. The pump cover is located on the right side of the motor front cover and is connected to the motor front cover by bolts. A sealing ring is provided between the motor front cover and the pump cover. The pump cover is fixedly installed on the left side of the pump casing. The outlet pipe is vertically fixed at the middle position of the top of the pump casing. The motor front cover is located on the pump casing and is welded to the pump casing. The base is installed at the bottom of the pump casing.

[0004] In the centrifugal pump with a mechanical seal provided by this patent, the sealing treatment is carried out by a sealing ring. After long-term use, the sealing ring is prone to wear or debris may adhere to the sealing ring, affecting the sealing effect of the sealing ring. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a centrifugal pump.

[0006] The objective of this utility model can be achieved through the following technical solution: A centrifugal pump includes a pump body, a pump cover, and a bearing housing. The pump cover is fixedly connected to one side of the pump body, and one end of the bearing housing is fixedly connected to the other end of the pump cover. An outlet and an inlet are formed in the pump body. A pump shaft is connected to the bearing housing. The pump shaft passes through the pump cover and extends into the pump body. A mechanical seal is fitted and fixed on the pump shaft at the outer end of the pump cover. A first pipe hole is formed at the upper end of the mechanical seal. A through hole is formed at the inner end of the first pipe hole. A connecting groove is formed on the surface of the mechanical seal at the end of the pipe hole. A first delivery pipe joint is fixedly connected in the connecting groove. A pipe connector is formed at the outer end of the inlet. A second pipe hole is formed on the inner wall of the inlet and penetrates the pipe connector. A second delivery pipe joint is fixedly installed on the outside of the pipe connector. A delivery pipe is fixedly connected between the first delivery pipe joint and the second delivery pipe joint.

[0007] In one of the centrifugal pumps described above, a pump impeller is sleeved and connected to the pump shaft, and the pump impeller is located inside the pump body.

[0008] In one of the centrifugal pumps described above, a reinforcing rib is formed at one end of the pump body, and the reinforcing rib is connected to the pump cover.

[0009] In one of the centrifugal pumps described above, a constant-level oil tank is fixedly installed on one side of the bearing housing.

[0010] Compared with the prior art, the centrifugal pump provided by this utility model has the following beneficial effects: 1. Through the structural arrangement of the first delivery pipe joint, the second delivery pipe joint, and the delivery pipe, an external cleaning fluid pipe is installed at the second pipe hole on the inner wall of the pump body inlet, which can flush the mechanical seal and improve the service life of the mechanical seal; 2. The rigidity of the pump body is improved by the reinforcing ribs around one side of the pump body, preventing the pump casing from deforming under high pressure or high load, thereby extending the service life of the pump body. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0013] Figure 3 This is a schematic diagram of a mechanical seal structure.

[0014] In the diagram: 1. Pump body; 11. Outlet; 12. Inlet; 13. Pipe connector; 14. Second pipe hole; 15. Reinforcing rib; 2. Pump cover; 3. Bearing housing; 4. Pump shaft; 5. Mechanical seal; 51. First pipe hole; 52. Through hole; 53. Connecting groove; 6. First delivery pipe joint; 7. Second delivery pipe joint; 8. Delivery pipe; 9. Pump impeller; 10. Constant level oil tank. Detailed Implementation

[0015] 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.

[0016] like Figures 1 to 3 As shown, this embodiment includes a water pump body 1, a water pump cover 2, a bearing housing 3, a water pump shaft 4, a mechanical seal 5, and a water pump impeller 9. The water pump cover 2 is fixedly connected to one side of the water pump body 1, and one end of the bearing housing 3 is fixedly connected to the other end of the water pump cover 2. The water pump body 1 is generally volute-shaped. An inlet 12 is formed at the upper end of the water pump body 1, and an outlet 11 is formed at the front side of the water pump body 1. The water pump shaft 4 is connected to the bearing housing 3 and extends out of the bearing housing 3. The water pump shaft 4 passes through the water pump cover 2 and extends into the water pump body 1. The water pump impeller 9 is located inside the water pump body 1 and is sleeved on the water pump shaft 4.

[0017] like Figures 1 to 3 As shown, the mechanical seal 5 is sleeved on the pump shaft 4 at the outer end of the pump cover 2. The upper end of the mechanical seal 5 has a first pipe hole 51, and the inner end of the first pipe hole 51 has a through hole 52. The surface of the mechanical seal 5 at the end of the pipe hole has a connecting groove 53. The first delivery pipe joint 6 is fixedly connected to the mechanical seal 5 through the connecting groove 53. The outer end of the water inlet 12 of the pump body 1 forms a pipe connector 13. The inner wall of the water inlet 12 has a second pipe hole 14, which penetrates the pipe connector 13. The second pipe hole 14 is used to connect to an external cleaning fluid pipe. The second delivery pipe joint 7 is fixedly installed outside the pipe connector 13. The delivery pipe 8 is connected between the first delivery pipe joint 6 and the second delivery pipe joint 7. The cleaning fluid passes through the second pipe hole 14, the delivery pipe 8, and the first pipe hole 51, and finally sprays the cleaning fluid onto the mechanical seal 5 through the through hole 52 to clean the mechanical seal 5 and prevent dirt from adhering to the mechanical seal 5.

[0018] To elaborate further, such as Figures 1 to 2 As shown, a ring-shaped reinforcing rib 15 is formed at one end of the pump body 1. The reinforcing rib 15 is connected to the pump cover 2. The reinforcing rib 15 improves the rigidity of the pump body 1 and prevents the pump casing from deforming under high pressure or high load conditions.

[0019] To elaborate further, such as Figures 1 to 2 As shown, a constant level oil tank 10 is fixedly installed on one side of the bearing housing 3. In this embodiment, the bearing needs sufficient lubrication to reduce friction and wear when rotating at high speed. The constant level oil tank 10 can ensure that the bearing continuously receives an appropriate amount of lubricating oil.

[0020] 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.

[0021] 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 centrifugal pump, comprising a pump body (1), a pump cover (2), and a bearing housing (3), wherein the pump cover (2) is fixedly connected to one side of the pump body (1), one end of the bearing housing (3) is fixedly connected to the other end of the pump cover (2), an outlet (11) and an inlet (12) are respectively formed in the pump body (1), and a pump shaft (4) is connected in the bearing housing (3), wherein the pump shaft (4) passes through the pump cover (2) and extends into the pump body (1), characterized in that: A mechanical seal (5) is fixedly fitted on the pump shaft (4) at the outer end of the pump cover (2). A first pipe hole (51) is opened at the upper end of the mechanical seal (5). A through hole (52) is opened at the inner end of the first pipe hole (51). A connecting groove (53) is opened on the surface of the mechanical seal (5) at the end of the pipe hole. A first delivery pipe joint (6) is fixedly connected in the connecting groove (53). A pipe connector (13) is formed at the outer end of the inlet (12). A second pipe hole (14) is opened on the inner wall of the inlet (12) and the second pipe hole (14) penetrates the pipe connector (13). A second delivery pipe joint (7) is fixedly installed on the outside of the pipe connector (13). A delivery pipe (8) is fixedly connected between the first delivery pipe joint (6) and the second delivery pipe joint (7).

2. A centrifugal pump according to claim 1, characterized in that: A water pump impeller (9) is sleeved and connected on the pump shaft (4), and the water pump impeller (9) is located inside the pump body (1).

3. A centrifugal pump according to claim 1, characterized in that: The pump body (1) has a reinforcing rib (15) at one end, and the reinforcing rib (15) is connected to the pump cover (2).

4. A centrifugal pump according to claim 1, characterized in that: A constant level oil tank (10) is fixedly installed on one side of the bearing housing (3).

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