Booster pump

Abstract

The utility model provides a booster pump which comprises a volute, a rotating impeller is arranged in the volute, the impeller comprises an upper cover plate and a lower cover plate, a liquid inlet is formed in the middle of the upper cover plate, a vertical conical cylinder is arranged in the middle of the lower cover plate, the upper end of the conical cylinder is arranged in the liquid inlet, Z-shaped blades are evenly distributed on the conical cylinder in the circumferential direction, and the lower end of the conical cylinder is connected with the volute. The lower ends of the Z-shaped blades are fixedly connected with the conical cylinder, the upper ends of the Z-shaped blades incline upwards and are connected with the inner wall of the upper cover plate, arc-shaped plates are arranged between the edges of the upper cover plate and the lower cover plate at intervals, and the arc-shaped plates correspond to the Z-shaped blades one to one. Through the arrangement of the Z-shaped blades and the conical cylinder, working liquid is guided and preliminarily pressurized, and then the working liquid enters the arc-shaped channel to be further pressurized, so that the pressurizing effect of the booster pump is improved, and the large outlet flow is realized.

Description

Technical Field

[0001] This utility model relates to the field of booster pump technology, and in particular to a booster pump. Background Technology

[0002] Existing booster pump impellers typically consist of circumferentially distributed arc-shaped blades, with arc-shaped channels formed between adjacent blades. As the impeller rotates at high speed, the working fluid passes through the arc-shaped channels and rotates along with them. Then, under the action of centrifugal force, it is thrown towards the outlet along the arc-shaped channels, thus pressurizing the working fluid. This structure has limited pressurization effect and is not suitable for large outlet flow rates. Utility Model Content

[0003] This invention proposes a booster pump that guides and initially pressurizes the working fluid through the arrangement of Z-shaped blades and a conical cylinder. Then, the working fluid enters an arc-shaped channel for further pressurization, thereby improving the booster pump's pressurization effect and achieving a large outlet flow rate.

[0004] The technical solution of this utility model is implemented as follows: A booster pump includes a volute, in which a rotating impeller is disposed. The impeller includes an upper cover plate and a lower cover plate. An inlet is disposed in the middle of the upper cover plate, and a vertical conical column is disposed in the middle of the lower cover plate. The upper end of the conical column is placed inside the inlet. Z-shaped blades are evenly distributed around the upper edge of the conical column. The lower end of the Z-shaped blades is fixedly connected to the conical column, and the upper end of the Z-shaped blades is inclined upward and connected to the inner wall of the upper cover plate. Arc-shaped plates are disposed at intervals between the edges of the upper cover plate and the lower cover plate, and the arc-shaped plates correspond one-to-one with the Z-shaped blades.

[0005] Furthermore, a coaxial graphite moving ring is provided on the outside of the liquid inlet, and an inlet flange is provided at the inlet of the volute. Inside the inlet flange, a graphite stationary ring that mates with the graphite moving ring is provided, and the inlet flange is connected to the liquid inlet.

[0006] Furthermore, it also includes a motor, the output end of which is connected to a conical cylinder. A coaxial positioning ring is provided at the end of the volute housing away from the liquid inlet. The positioning ring is placed inside the motor housing, and a first sealing ring is provided at the junction of the positioning ring and the housing. The positioning ring ensures the coaxiality of the motor and the volute housing when connected.

[0007] Furthermore, the volute is also equipped with a liquid outlet, and a drain outlet is provided on the liquid outlet.

[0008] Furthermore, an annular positioning plate is provided at the end of the inlet flange near the volute, with the outer wall of the positioning plate abutting against the inner wall of the volute. The positioning plate ensures the coaxiality of the inlet flange and the volute during connection.

[0009] Furthermore, the upper end of the Z-shaped blade is flush with the upper end of the conical cylinder.

[0010] Furthermore, a second sealing ring is provided at the junction of the volute and the inlet flange.

[0011] The beneficial effects of this utility model are:

[0012] This invention utilizes Z-shaped blades and a conical cylinder to guide and initially pressurize the working fluid. The working fluid then enters an arc-shaped channel for further pressurization. With this structure, the working fluid inlet pressure is 70 kPa to 160 kPa (absolute pressure), and at an outlet flow rate of 100 L / min, the pump pressurization value ΔP ≥ 0.65 MPa, achieving high pressurization and high flow rate. Furthermore, the use of Z-shaped blades ensures the strength and stability of the blade tip connection. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 Top view;

[0016] Figure 3 This is a top view of the impeller;

[0017] Figure 4 for Figure 3 Sectional view of AA;

[0018] Figure 5 This is a schematic diagram of the arc-shaped plate.

[0019] Figure 6 This is a schematic diagram of the volute shell.

[0020] 1. Volute casing; 2. Impeller; 3. Upper cover plate; 4. Lower cover plate; 5. Liquid inlet; 6. Conical cylinder; 7. Z-shaped blade; 8. Arc plate; 9. Graphite moving ring; 10. Inlet flange; 11. Graphite stationary ring; 12. Positioning plate; 13. Second sealing ring; 14. Motor; 15. Positioning ring; 16. First sealing ring; 17. Ceramic bearing; 18. Type A flat key; 19. Liquid outlet; 20. Sewage outlet. 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] The terms "upper" and "lower" in this utility model are relative to... Figure 1 The positional relationship is shown.

[0023] Example 1

[0024] like Figure 1 and Figure 3-5 As shown, a booster pump includes a volute 1, inside which a rotating impeller 2 is disposed. The impeller 2 includes an upper cover plate 3 and a lower cover plate 4. An inlet 5 is disposed in the middle of the upper cover plate 3, and a vertical conical column 6 is fixed in the middle of the lower cover plate 4. The lower cover plate 4 and the conical column 6 are integral structures, and the conical column 6 and the inlet 5 are arranged coaxially.

[0025] The upper end of the conical column 6 is placed inside the liquid inlet 5. Z-shaped blades 7 are evenly distributed around the upper edge of the conical column 6. The lower end of the Z-shaped blades 7 is fixedly connected to the conical column 6. The upper end of the Z-shaped blades 7 is inclined upward and fixedly connected to the inner wall of the upper cover plate 3. The upper end of the Z-shaped blades 7 is flush with the upper end of the conical column 6. Arc-shaped plates 8 are fixed between the edges of the upper cover plate 3 and the lower cover plate 4 at intervals. An arc-shaped channel is formed between adjacent arc-shaped plates 8. The arc-shaped plates 8 correspond one-to-one with the Z-shaped blades 7.

[0026] When the booster pump is in use, the working fluid enters through the inlet 5. As the impeller 2 rotates at high speed, the working fluid is first guided and initially pressurized by the Z-shaped blades 7 and the conical cylinder 6, causing it to enter the arc-shaped channel and rotate with the arc-shaped channel. Then, under the action of centrifugal force, it is thrown towards the outlet along the arc-shaped channel, giving the working fluid a certain kinetic energy and further pressurization. When the working fluid in the arc-shaped channel is thrown out, a vacuum appears near the inlet 5, enabling the booster pump to continuously deliver and pressurize the fluid, thereby providing the working fluid at a certain pressure and flow rate.

[0027] Example 2

[0028] This implementation is basically the same as Example 1, except that: Figure 1 As shown, a coaxial graphite moving ring 9 is fixed on the outside of the liquid inlet 5, and an inlet flange 10 is fixed at the inlet of the volute 1. A graphite stationary ring 11 that mates with the graphite moving ring 9 is fixed inside the inlet flange 10. The inlet flange 10 is connected to the liquid inlet 5.

[0029] An annular positioning plate 12 is fixed to one end of the inlet flange 10 near the volute 1. The positioning plate 12 and the inlet flange 10 are integrally formed, and the outer wall of the positioning plate 12 abuts against the inner wall of the volute 1. The positioning plate 12 ensures the coaxiality of the inlet flange 10 and the positioning plate 12 during assembly. A second sealing ring 13 is provided at the joint between the volute 1 and the inlet flange 10 to ensure the sealing performance at the joint.

[0030] like Figure 1 As shown, the booster pump also includes a motor 14. A coaxial positioning ring 15 is fixed to the end of the volute 1 away from the inlet 5. The positioning ring 15 is placed inside the housing of the motor 14 to ensure the coaxiality of the volute 1 and the motor 14 during assembly. A first sealing ring 16 is provided at the junction of the positioning ring 15 and the housing to ensure the sealing performance at the junction. A shaft hole is provided on the conical cylinder 6. The output shaft of the motor 14 is rotatably connected to the volute 1 through a ceramic bearing 17, then passes through the shaft hole, and is connected to the conical cylinder 6 through a type A flat key 18. The motor 14 drives the impeller 2 to rotate at high speed. The motor 14 is a high-speed AC motor.

[0031] like Figure 2 and 6 As shown, a liquid outlet 19 is also fixed on the volute 1, and a drain outlet 20 is fixed on the liquid outlet 19. After the working fluid is pressurized, it is discharged through the liquid outlet 19. If the booster pump needs to be drained, the drain outlet 20 is opened.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A booster pump, comprising a volute casing, wherein a rotating impeller is disposed within the volute casing, the impeller comprising an upper cover plate and a lower cover plate, wherein an inlet is disposed at the center of the upper cover plate, and a vertical conical column is disposed at the center of the lower cover plate, the upper end of the conical column being placed inside the inlet, characterized in that: Z-shaped blades are evenly distributed around the circumference of the conical column. The lower end of the Z-shaped blades is fixedly connected to the conical column, and the upper end of the Z-shaped blades is inclined upward and connected to the inner wall of the upper cover plate. Arc-shaped plates are provided at intervals between the edges of the upper cover plate and the lower cover plate, and the arc-shaped plates correspond one-to-one with the Z-shaped blades.

2. A booster pump according to claim 1, characterized in that: A coaxial graphite moving ring is provided on the outside of the liquid inlet, and an inlet flange is provided at the inlet of the volute. A graphite stationary ring that mates with the graphite moving ring is provided inside the inlet flange, and the inlet flange is connected to the liquid inlet.

3. A booster pump according to claim 1 or 2, characterized in that: It also includes a motor, the output end of which is connected to a conical cylinder. A coaxial positioning ring is provided at the end of the volute away from the liquid inlet. The positioning ring is placed inside the motor housing, and a first sealing ring is provided at the junction of the positioning ring and the housing.

4. A booster pump according to claim 1 or 2, characterized in that: The volute is also equipped with a liquid outlet, and a drain outlet is provided on the liquid outlet.

5. A booster pump according to claim 2, characterized in that: An annular positioning plate is provided at one end of the inlet flange near the volute, with the outer wall of the positioning plate abutting against the inner wall of the volute.

6. A booster pump according to claim 1, characterized in that: The upper end of the Z-shaped blade is flush with the upper end of the conical cylinder.

7. A booster pump according to claim 2 or 5, characterized in that: A second sealing ring is installed at the junction of the volute and the inlet flange.

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