A cantilever type centrifugal pump for small flow and high lift

Abstract

The utility model relates to centrifugal pump technical field, and disclose a cantilever type centrifugal pump for small flow high lift, including the pump shell, the rear end of pump shell is fixed with the sealing seat, the inside installation of sealing seat is with the waterproof layer that carries out the sealing to the pump shell, the side of pump shell is installed with the water outlet that drives liquid to discharge, the front end of pump shell is installed with the water inlet that drives liquid absorption. This cantilever type centrifugal pump for small flow high lift, through the impeller and wear -resisting ring are installed in the inside of pump shell, the centrifugal force is produced when the impeller rotates, can drive liquid transmission, and the position of wear -resisting ring before the impeller can be adjusted, after adjusting the position of wear -resisting ring, the liquid activity space driven by the impeller rotation can be adjusted, by changing the activity area, the centrifugal force size can be adjusted, the energy size of liquid output speed and distance can be adjusted, ensure that the liquid transmission amount controllable effect.

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump technology, specifically a cantilever centrifugal pump for small flow rate and high head. Background Technology

[0002] Centrifugal pumps work by using the rotation of an impeller to cause water to move at a centrifugal speed. Before starting the pump, the pump casing and suction pipe must be filled with water. Then, the motor is started, and the pump shaft drives the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown towards the outer edge of the impeller. It then flows into the pump's discharge pipe through the flow channel of the volute casing. Cantilever centrifugal pumps with small flow rates and high head are specially designed to handle small flow applications that require high pressure. They usually play an important role in liquid transportation and pressurization processes.

[0003] In the operation of cantilever centrifugal pumps, the impeller is installed inside the casing, and a wear-resistant ring is installed inside the casing. There is a gap between the wear-resistant ring and the impeller. The gap creates a space for the flow of liquid. However, the liquid flow space is usually fixed, which means that the liquid has a fixed space for movement during centrifugation, which is not conducive to the liquid storing energy after centrifugation, thus affecting the water delivery effect of the equipment. Therefore, we propose a cantilever centrifugal pump for small flow and high head. Utility Model Content

[0004] To address the shortcomings of existing cantilever centrifugal pumps designed for low flow rates and high lift, this invention provides a cantilever centrifugal pump for low flow rates and high lift. This pump features an adjustable liquid flow space via a wear-resistant ring positioned at the impeller front end, ensuring sufficient flow during operation and resolving the problems mentioned in the background section.

[0005] This utility model provides the following technical solution: a cantilever centrifugal pump for small flow and high head, comprising a pump casing, a sealing seat fixed at the rear end of the pump casing, a waterproof layer for sealing the inside of the sealing seat, an outlet for discharging liquid installed on the side of the pump casing, an inlet for absorbing liquid installed at the front end of the pump casing, an impeller installed on the inner wall of the pump casing, a wear-resistant ring installed inside the pump casing and at the point of contact with the outside of the impeller, a first connecting plate fixedly connected to the middle of the wear-resistant ring, a connecting frame fixedly fixed to the outside of the pump casing, a rotating shaft fixedly fixed to one side of the middle of the impeller, a sealing sleeve installed at the rear end of the connecting frame, a circular clamp movably sleeved on the outside of the rear end of the connecting frame, and a positioning seat installed at the lower end of the circular clamp.

[0006] Preferably, the impeller includes a disc, and blades are fixed at equal intervals on the outside of the disc. The blades are installed inside the pump casing, and the inner side of the wear-resistant ring is in contact with the inclined surface formed by the outer side of the blades.

[0007] Preferably, the wear-resistant ring is externally fixed with a first fixing post and a second fixing post, and three sets of second connecting plates are externally fixed with the first fixing post and the second fixing post. The first fixing post and the second fixing post penetrate the interior of the pump casing.

[0008] Preferably, a connecting sleeve is fixed to the outside of the second fixed column, and a threaded sleeve is movably sleeved on the outside of the connecting sleeve, and the threaded sleeve is threadedly connected to the outside of the water inlet.

[0009] Preferably, the first connecting plate is movably sleeved inside the water inlet, the rotating shaft passes through the inside of the sealing sleeve, and a motor is installed at the rear end of the rotating shaft.

[0010] Preferably, a bearing is installed inside the sealing sleeve, a sealing cap is installed at the rear end of the sealing sleeve, and the bearing is fitted onto the outside of the rotating shaft.

[0011] Preferably, the circular jacket is equipped with a fastening bolt that defines the position of the connecting frame. The fastening bolt passes through the circular jacket and is installed on the outside of the connecting frame. The lower end of the pump casing is placed on the upper part of the positioning seat.

[0012] Compared with existing cantilever centrifugal pumps used for small flow rates and high head, this invention has the following advantages:

[0013] 1. This cantilever centrifugal pump, designed for small flow and high head, features an impeller and wear ring both installed inside the pump casing. The impeller's rotation generates centrifugal force, which drives the liquid flow. The position of the wear ring at the impeller's front end is adjustable. Adjusting the wear ring position allows for adjustment of the space in which the impeller moves the liquid. By changing this space, the magnitude of the centrifugal force can be adjusted, thus controlling the liquid output speed and distance, ensuring controllable liquid flow.

[0014] 2. This cantilever centrifugal pump, designed for small flow and high head, is installed in different areas via a positioning seat. The pump casing is fitted to the upper part of the positioning seat, improving the overall stability of the centrifugal pump. At the same time, the angle of the rotating connecting frame inside the circular jacket can be adjusted, ensuring that the direction of the outlet installed on the outside of the pump casing can be adjusted, thus improving the convenience of equipment installation and output orientation adjustment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0016] Figure 2 This is a side view of the structure of this utility model;

[0017] Figure 3This is a schematic cross-sectional view of the main body of this utility model;

[0018] Figure 4 This is an enlarged schematic diagram of the impeller structure of this utility model;

[0019] Figure 5 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0020] In the diagram: 1. Pump casing; 2. Sealing seat; 3. Waterproof layer; 4. Outlet; 5. Inlet; 6. Impeller; 61. Disc; 62. Blade; 7. Wear ring; 8. First connecting plate; 9. First fixing column; 10. Second fixing column; 11. Second connecting plate; 12. Connecting sleeve; 13. Threaded sleeve; 14. Connecting frame; 15. Rotating shaft; 16. Sealing sleeve; 17. Bearing; 18. Sealing cover; 19. Circular jacket; 20. Fastening bolt; 21. Positioning seat. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5A cantilever centrifugal pump for small flow rate and high head includes a pump casing 1. A sealing seat 2 is fixed to the rear end of the pump casing 1, sealing the rear end of the pump casing 1 to ensure that a rotating shaft 15 can be connected to an impeller 6 installed inside the pump casing 1. A waterproof layer 3 is installed inside the sealing seat 2 to seal the inside of the pump casing 1. After the rotating shaft 15 is installed inside the pump casing 1, the waterproof layer 3 is installed inside the sealing seat 2 to seal the space between the sealing seat 2 and the rotating shaft 15. An outlet 4 for discharging liquid is installed on the side of the pump casing 1, and the outlet 4 drives the liquid output. An inlet 5 for absorbing liquid is installed at the front end of the pump casing 1. An impeller 6 is installed on the inner wall of the pump casing 1. When the impeller 6 rotates, it applies centrifugal force. Under the action of the pump casing 1, the liquid is effectively pushed to circulate, ensuring that the liquid delivery distance is increased. A wear-resistant ring 7 is installed inside the pump casing 1 and at the point where it fits against the outside of the impeller 6. A first connecting plate 8 is fixedly connected to the middle of the wear-resistant ring 7. The first connecting plate 8 is installed inside the water inlet 5. The first connecting plate 8 improves the stability of the wear-resistant ring 7 when its position is adjusted inside the pump casing 1. A connecting frame 14 is fixed to the outside of the pump casing 1. A rotating shaft 15 is fixed to one side of the middle of the impeller 6. A sealing sleeve 16 is installed at the rear end of the connecting frame 14. A circular jacket 19 is movably sleeved on the outside of the rear end of the connecting frame 14. A positioning seat 21 is installed at the lower end of the circular jacket 19. After the positioning seat 21 is installed on the ground, the positioning seat 21 can support the entire centrifugal pump.

[0023] Please see Figure 4 The impeller 6 includes a disc 61, and blades 62 are fixed at equal intervals on the outside of the disc 61. The blades 62 are installed inside the pump casing 1. The inner side of the wear ring 7 is in contact with the inclined surface formed by the outer side of the blades 62. The impeller 6 is installed inside the pump casing 1 and includes a disc 61 and blades 62. When the drive device is started to drive the blades 62 to rotate, the blades 62 drive the liquid to flow. During the rotation of the blades 62, centrifugal force is generated and the liquid is controlled to be output through the outlet 4.

[0024] Please see Figure 1 The wear ring 7 is externally fixed with a first fixing post 9 and a second fixing post 10. Three sets of second connecting plates 11 are externally fixed with the first fixing post 9 and the second fixing post 10. The first fixing post 9 and the second fixing post 10 penetrate the interior of the pump casing 1. The second fixing post 10 and the first fixing post 9 are externally mounted with second connecting plates 11. After adjusting the position of the second fixing post 10, the wear ring 7 can be precisely adjusted in position inside the pump casing 1 by the traction of the second connecting plates 11. After adjusting the position of the wear ring 7, the gap between the wear ring 7 and the impeller 6 can be adjusted. By adjusting the gap, the pressure difference formed by the liquid in the pump casing 1 changes, achieving a small flow transmission effect. Moreover, the liquid output efficiency can be precisely controlled according to different external pressures.

[0025] Please see Figure 5 A connecting sleeve 12 is fixed to the outside of the second fixed column 10. A threaded sleeve 13 is movably sleeved on the outside of the connecting sleeve 12. The threaded sleeve 13 is threadedly connected to the outside of the water inlet 5. The connecting sleeve 12 is installed on the outside of the second fixed column 10, and the connecting sleeve 12 and the threaded sleeve 13 move threadedly. By rotating the threaded sleeve 13, the position of the wear ring 7 inside the pump housing 1 can be adjusted, ensuring the convenience and efficiency of adjusting the position of the wear ring 7.

[0026] Please see Figure 5 The first connecting plate 8 is movably sleeved inside the inlet 5. The rotating shaft 15 passes through the inside of the sealing sleeve 16, and a motor is installed at the rear end of the rotating shaft 15. The motor is installed inside the inlet 5 through the first connecting plate 8. That is, during the adjustment of the position of the wear ring 7 inside the pump casing 1, the first connecting plate 8 improves the stability of the position adjustment of the wear ring 7. At the same time, the motor is installed at the rear end of the rotating shaft 15. When the motor is started, the motor drives the impeller 6 to rotate to provide power.

[0027] Please see Figure 3 The sealing sleeve 16 has a bearing 17 installed inside, and a sealing cover 18 is installed at the rear end of the sealing sleeve 16. The bearing 17 is fitted to the outside of the rotating shaft 15. By installing the bearing 17 inside the sealing sleeve 16, and with the bearing 17 installed outside the rotating shaft 15, the bearing 17 reduces the frictional resistance when the rotating shaft 15 rotates, thus ensuring the stability of the rotating shaft 15 when it rotates.

[0028] Please see Figure 1 The circular jacket 19 is equipped with a fastening bolt 20 that limits the position of the connecting frame 14. The fastening bolt 20 passes through the circular jacket 19 and is installed on the outside of the connecting frame 14. The lower end of the pump casing 1 is placed on the upper part of the positioning seat 21 and is connected to the outside of the connecting frame 14 through the circular jacket 19. The angle of the connecting frame 14 is adjusted, that is, the angle of the outlet 4 installed on the outside of the centrifugal pump is adjusted by the connecting frame 14. The fastening bolt 20 is rotated, and the fastening bolt 20 limits the position of the connecting frame 14 inside the circular jacket 19. The positioning seat 21 supports the pump casing 1 and improves the stability of the pump casing 1 during use.

[0029] Working principle: During use, the rotating shaft 15 passes through the pump casing 1 and the sealing sleeve 16. At the same time, a motor is installed at the rear end of the rotating shaft 15. Depending on the material and site pressure, the threaded sleeve 13 is rotated. The threaded sleeve 13 pushes the position of the connecting sleeve 12 to adjust. That is, with the assistance of the first fixed column 9 and the second fixed column 10, the distance between the wear ring 7 and the impeller 6 is adjusted. During the rotation of the impeller 6, centrifugal force is generated, which can drive the liquid to be absorbed through the inlet 5 and discharged through the outlet 4. At the same time, since the position of the wear ring 7 can be adjusted, the size of the cavity can be adjusted. After the cavity is adjusted, the magnitude of the centrifugal force generated when the impeller 6 rotates can be adjusted, which can achieve the function of transferring liquid at a small flow rate. The connecting frame 14 is movably sleeved inside the circular jacket 19. After the angle of the pump casing 1 is adjusted, the connecting frame 14 supports the structure of the pump casing 1, improving the stability of the equipment during support.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cantilever centrifugal pump for low flow rate and high head, comprising a pump casing (1), a sealing seat (2) fixed to the rear end of the pump casing (1), a waterproof layer (3) for sealing the interior of the pump casing (1) being installed inside the sealing seat (2), and an outlet (4) for discharging liquid being installed on the side of the pump casing (1), characterized in that: The pump casing (1) is equipped with an inlet (5) for driving liquid absorption at the front end. An impeller (6) is installed on the inner wall of the pump casing (1). A wear-resistant ring (7) is installed inside the pump casing (1) and at the point where it fits against the outside of the impeller (6). A first connecting plate (8) is fixedly connected to the middle of the wear-resistant ring (7). A connecting frame (14) is fixed to the outside of the pump casing (1). A rotating shaft (15) is fixed to one side of the middle of the impeller (6). A sealing sleeve (16) is installed at the rear end of the connecting frame (14). A circular jacket (19) is movably sleeved on the outside of the rear end of the connecting frame (14). A positioning seat (21) is installed at the lower end of the circular jacket (19).

2. A cantilever centrifugal pump for small flow rate and high head according to claim 1, characterized in that: The impeller (6) includes a disc (61), and blades (62) are fixed at equal intervals on the outside of the disc (61). The blades (62) are installed inside the pump casing (1), and the inner side of the wear-resistant ring (7) and the inclined surface formed by the outer side of the blades (62) are in contact.

3. A cantilever centrifugal pump for small flow rate and high head according to claim 1, characterized in that: The wear-resistant ring (7) is fixed with a first fixing post (9) and a second fixing post (10) on the outside. Three sets of second connecting plates (11) are fixed to the outside of the first fixing post (9) and the second fixing post (10). The first fixing post (9) and the second fixing post (10) penetrate the interior of the pump casing (1).

4. A cantilever centrifugal pump for small flow rate and high head according to claim 3, characterized in that: The second fixed column (10) is fixed with a connecting sleeve (12) on the outside. The connecting sleeve (12) is movably sleeved with a threaded sleeve (13). The threaded sleeve (13) is threadedly connected to the outside of the water inlet (5).

5. A cantilever centrifugal pump for small flow rate and high head according to claim 1, characterized in that: The first connecting plate (8) is movably sleeved inside the water inlet (5), the rotating shaft (15) passes through the inside of the sealing sleeve (16), and a motor is installed at the rear end of the rotating shaft (15).

6. A cantilever centrifugal pump for small flow rate and high head according to claim 1, characterized in that: The bearing (17) is installed inside the sealing sleeve (16), and the sealing cover (18) is installed at the rear end of the sealing sleeve (16). The bearing (17) is fitted to the outside of the rotating shaft (15).

7. A cantilever centrifugal pump for small flow rate and high head according to claim 1, characterized in that: The circular sleeve (19) is equipped with a fastening bolt (20) that defines the position of the connecting frame (14). The fastening bolt (20) passes through the circular sleeve (19) and is installed on the outside of the connecting frame (14). The lower end of the pump housing (1) is placed on the upper part of the positioning seat (21).

Images