Double-blade single-shaft centrifugal pump with flow guide mechanism

Abstract

The utility model relates to the technical field of centrifugal pumps, in particular to a double-blade single-shaft centrifugal pump with a flow guide mechanism, which comprises a bottom table, a pump body is fixedly connected to the upper surface of the bottom table, and a rotating shaft is rotatably connected between the vertical parallel inner sides of the pump body. A pair of flow guide assemblies used for drainage is arranged on the rotating shaft located in the pump body, each flow guide assembly comprises a pair of flow guide blades slidably connected to the outer side of the rotating shaft in a sleeving mode, connecting frames are fixedly connected to the two opposite sides of each flow guide blade, and connecting arms are hinged to the middles of the connecting frames. The double-blade single-shaft centrifugal pump with the flow guide mechanism aims to solve the problems that in the water pumping process of the centrifugal pump, the interior of the pump body bears high-pressure impact of water all the time, the flow guide blades are arranged in the pump body, the flow guide blades are arranged in the pump body, the flow guide blades are arranged in the pump body, and the flow guide blades are arranged in the pump body and are communicated through a connecting assembly arranged between the connecting arms. And the service life of the pump body is short.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, in particular to a double-blade single-shaft centrifugal pump with a flow guide mechanism. Background Art

[0002] Centrifugal pumps are available in various types, including vertical, horizontal, single-stage, multi-stage, single-suction, double-suction, and self-priming. Centrifugal pumps work by using the rotation of the impeller to cause the water to undergo centrifugal motion. Before starting the pump, the pump casing and the suction pipe must be filled with water, and then the motor is started so that the pump shaft drives the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown to the outer edge of the impeller, flowing into the water pressure pipeline of the pump through the flow channel of the volute pump casing.

[0003] In the prior art, most centrifugal pumps do not have components for automatically adjusting water pressure, so that during the pumping process, the inside of the centrifugal pump is constantly subjected to high-pressure impact of water, resulting in a short service life of the pump. Utility Model Content

[0004] The purpose of the utility model is to provide a double-blade single-shaft centrifugal pump with a guide mechanism to solve the problem that the pump body is constantly subjected to high-pressure impact of water during the pumping process, resulting in a short service life of the pump body.

[0005] To achieve the above-mentioned purpose, a double-blade single-shaft centrifugal pump with a diversion mechanism is provided, including a base, a pump body is fixedly connected to the upper surface of the base, a rotating shaft is rotatably connected between the vertically parallel inner sides of the pump body, and a pair of diversion components for diversion are provided on the rotating shaft inside the pump body. The diversion component includes a pair of guide blades slidably sleeved on the outside of the rotating shaft, a connecting frame is fixedly connected to the opposite sides of the guide blades, a connecting arm is hingedly connected to the middle of the connecting frame, the pair of guide blades are connected by a connecting component arranged between the connecting arms, and a water inlet and a water outlet are provided on the outside of the pump body.

[0006] As a further improvement of the present technical solution, the connecting assembly includes a central axis rotatably connected to the middle of a pair of connecting arms, a connecting block is fixedly connected to the outside of the central axis, a return spring is fixedly connected to the outside of the connecting block, a multi-section telescopic rod fixed to the connecting block is arranged inside the return spring, and a sphere is fixedly connected to one end of the multi-section telescopic rod and the return spring away from the connecting block.

[0007] As a further improvement of the technical solution, the connecting arms on the pair of guide vanes are rotatably connected to the upper and lower ends of the central shaft respectively, and the connecting block is fixedly connected to the outer side of the middle part of the central shaft.

[0008] As a further improvement of the present technical solution, a pair of guide vanes slide outside the rotating shaft and can rotate along with the rotating shaft, and the pair of guide vanes are both of trapezoidal design.

[0009] As a further improvement of this technical solution, a fixed block is fixedly connected to the upper surface of the base, a servo motor for driving the rotating shaft to rotate is fixedly connected to the top of the fixed block, and the output end of the servo motor and the rotating shaft are connected through a connector.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] This double-blade single-shaft centrifugal pump with a guide mechanism arranges a pair of guide blades and a sphere on the outside of the rotating shaft inside the pump body. The sphere controls the distance between the pair of guide blades by changing the centrifugal force it is subjected to, thereby adaptively increasing and decreasing the water pressure in the pump body, thereby extending the service life of the centrifugal pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of the pump body of the utility model;

[0014] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle.

[0015] In the figure: 1. Base; 2. Pump body; 3. Rotating shaft; 4. Guide vane; 5. Connecting frame; 6. Connecting arm; 7. Water inlet; 8. Water outlet; 9. Center axis; 10. Connecting block; 11. Return spring; 12. Multi-section telescopic rod; 13. Sphere; 14. Fixed block; 15. Servo motor; 16. Connector. DETAILED DESCRIPTION

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0019] See also Figure 1-Figure 3 As shown, the embodiment of the present invention provides a double-blade single-shaft centrifugal pump with a flow guide mechanism, and the double-blade single-shaft centrifugal pump includes the following solutions:

[0020] Specifically, it includes a base 1, a pump body 2 is fixedly connected to the upper surface of the base 1, a rotating shaft 3 is rotatably connected between the inner sides of the pump body 2 and vertically parallel, and a pair of guide components for diversion are provided on the rotating shaft 3 inside the pump body 2, and the guide component includes a pair of guide blades 4 that are slidably sleeved on the outer side of the rotating shaft 3, and the guide blades 4 are fixedly connected to a connecting frame 5 on both opposite sides, and a connecting arm 6 is hingedly connected to the middle of the connecting frame 5. The pair of guide blades 4 are connected through a connecting component provided between the connecting arms 6. A water inlet 7 and a water outlet port are provided on the outside of the pump body 2, and the connecting component includes a central shaft 9 that is rotatably connected to the middle of a pair of connecting arms 6, and a connecting block 10 is fixedly connected to the outside of the central shaft 9. A complex A positioning spring 11 is provided inside the return spring 11, and a multi-section telescopic rod 12 fixed to the connecting block 10 is provided. The multi-section telescopic rod 12 and the return spring 11 are fixed with a sphere 13 at one end away from the connecting block 10; the connecting arms 6 on a pair of guide blades 4 are respectively rotated to connect the upper and lower ends of the central shaft 9, and the connecting block 10 is fixed to the outer side of the middle part of the central shaft 9; the pair of guide blades 4 slide on the outside of the rotating shaft 3 and can rotate with the rotating shaft 3 at the same time, and the pair of guide blades 4 are both trapezoidal in design; a fixed block 14 is fixed to the upper surface of the base 1, and a servo motor 15 for driving the rotating shaft 3 to rotate is fixed to the top of the fixed block 14, and the output end of the servo motor 15 and the rotating shaft 3 are connected by a connector 16.

[0021] The above technical solution drives the rotating shaft 3 to rotate through the servo motor 15 located at the top of the fixed block 14, so that a pair of guide blades 4 on the outside of the rotating shaft 3 inside the pump body 2 rotates accordingly. Because a connecting arm 6 is hinged on the connecting frame 5 on the opposite sides of the pair of guide blades 4, and a pair of connecting arms 6 are rotatably connected to the upper and lower ends of the central shaft 9, the ball 13 connected to the middle connecting block 10 on the outside of the central shaft 9 will drive the pair of guide blades 4 to slide on the rotating shaft 3 as the centrifugal force generated by the rotation of the rotating shaft 3, thereby increasing and decreasing the water pressure in the pump body 2. Because a return spring 11 is fixed between the ball 13 and the connecting block 10, and a multi-section telescopic rod 12 for limiting is provided inside the return spring 11, the ball 13 can follow the change of centrifugal force and change the distance between the pair of guide blades 4, so that the pair of trapezoidal guide blades 4 can drive water to flow out of the water outlet 8 at a balanced pressure, thereby improving the service life of the pump body 2.

[0022] Working principle: When working, turn on the servo motor 15 to drive the rotating shaft 3 to rotate, thereby driving the pair of guide blades 4 on the outside of the rotating shaft 3 to rotate synchronously, so that the sphere 13 rotates. The centrifugal force of the sphere 13 causes the pair of guide blades 4 to slide relative to each other, thereby increasing the pumping pressure and the pumping speed. When the pressure in the pump body 2 increases, due to the resistance and pressure of the water, the centrifugal force on the sphere 13 is reduced, causing the pair of guide blades 4 to slide back to back, thereby reducing the pumping pressure and preventing long-term high-pressure operation from causing damage to the pump body 2.

[0023] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-blade single-shaft centrifugal pump with a flow guide mechanism, characterized in that: It comprises a base (1), the upper surface of the base (1) is fixedly connected to a pump body (2), and a rotating shaft (3) is rotatably connected between the vertically parallel inner sides of the pump body (2); A pair of flow guide components for guiding flow are provided on the rotating shaft (3) located inside the pump body (2); The guide assembly comprises a pair of guide blades (4) slidably sleeved on the outside of the rotating shaft (3); a connecting frame (5) is fixedly connected to opposite sides of the guide blades (4); a connecting arm (6) is hingedly connected to the middle of the connecting frame (5); and the pair of guide blades (4) are connected via a connecting assembly provided between the connecting arms (6); A water inlet (7) and a water outlet orifice are provided on the outside of the pump body (2).

2. The double-blade single-shaft centrifugal pump with a flow guide mechanism according to claim 1, characterized in that: The connecting assembly comprises a central shaft (9) rotatably connected to the middle of a pair of connecting arms (6); a connecting block (10) is fixedly connected to the outer side of the central shaft (9); a return spring (11) is fixedly connected to the outer side of the connecting block (10); a multi-section telescopic rod (12) fixed to the connecting block (10) is provided inside the return spring (11); a sphere (13) is fixedly connected to one end of the multi-section telescopic rod (12) and the return spring (11) away from the connecting block (10).

3. The double-blade single-shaft centrifugal pump with a flow guide mechanism according to claim 2, characterized in that: A pair of connecting arms (6) on the guide blades (4) are rotatably connected to the upper and lower ends of the central shaft (9), and the connecting block (10) is fixedly connected to the outer side of the middle part of the central shaft (9).

4. The double-blade single-shaft centrifugal pump with a flow guide mechanism according to claim 3, characterized in that: The pair of guide blades (4) slide outside the rotating shaft (3) and can rotate along with the rotating shaft (3). The pair of guide blades (4) are both of trapezoidal design.

5. The double-blade single-shaft centrifugal pump with a flow guide mechanism according to claim 1, characterized in that: A fixed block (14) is fixedly connected to the upper surface of the base (1), and a servo motor (15) for driving the rotating shaft (3) to rotate is fixedly connected to the top of the fixed block (14), and the output end of the servo motor (15) and the rotating shaft (3) are connected via a connector (16).

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