Impeller structure of self-priming pump

Abstract

The utility model provides a self-priming pump impeller structure which comprises an impeller body, a hub coaxially arranged on the impeller body is fixedly connected to the impeller body, a key groove is formed in the inner wall of the hub, a driving pipe is arranged in the hub in a penetrating mode, blades are fixedly connected to the outer wall of the impeller body, and the blades are fixedly connected to the outer wall of the impeller body. The multiple blades are evenly distributed along the axis of the impeller body, a connecting key is fixedly connected to the outer wall of the driving pipe, a connecting inclined face is arranged on the side wall of the connecting key and located in the key groove, a mounting hole is formed in the inner wall of the key groove, an elastic rod is arranged in the mounting hole, and the elastic rod is connected with the connecting key. The end, extending out of the mounting hole, of the elastic rod abuts against the outer wall of the connecting key, so that the purpose that the connecting key and the driving pipe are not prone to breakage is achieved.

Description

Technical Field

[0001] The utility model relates to a self-priming pump, in particular to an impeller structure of a self-priming pump. Background Art

[0002] The impeller of the self-priming pump is driven to rotate by the electric motor, which creates a vacuum in the middle of the impeller. Water will flow into the vacuum area, and then the water will be discharged through the high-speed rotating impeller, which plays the role of pushing the water.

[0003] At present, the Chinese patent with authorization announcement number CN208816395U discloses a self-priming pump impeller, including an impeller body, a hub, and a guide groove. The impeller body is disc-shaped, the guide groove is arranged on the body, and the hub is arranged on one side of the impeller body. The guide groove is U-shaped or semicircular, and there is a distance between the guide groove and the hub.

[0004] The impeller of this self-priming pump can quickly guide water into the pump casing, and the impeller wheel channel is not easily blocked. The self-priming pump has the advantage of strong self-priming ability. The drive pipe is inserted into the water flow channel, and a key is integrated on the outer wall of the drive pipe. When the drive pipe rotates, the key and the keyway on the hub will collide rigidly, so that the drive pipe drives the hub to rotate, and the key will wear out, and stress concentration will occur at the connection between the key and the drive pipe, which is easy to break. Utility Model Content

[0005] In view of this, the purpose of the present invention is to provide a self-priming pump impeller structure to achieve the purpose of preventing the connection key and the drive pipe from being easily broken.

[0006] In order to solve the above technical problems, the technical solution of the utility model is: a self-priming pump impeller structure, including an impeller body, a coaxially arranged hub is fixedly connected to the impeller body, a keyway is provided on the inner wall of the hub, a drive pipe is passed through the hub, blades are fixedly connected to the outer wall of the impeller body, a plurality of blades are evenly distributed along the axis of the impeller body, a connecting key is fixedly connected to the outer wall of the drive pipe, a connecting key is provided on the side wall of the connecting key, the connecting bevel is located in the keyway, a mounting hole is provided on the inner wall of the keyway, an elastic rod is provided in the mounting hole, and one end of the elastic rod extending from the mounting hole conflicts with the outer wall of the connecting key.

[0007] To implement the above technical solution, the drive tube is inserted into the wheel hub, and the connecting key is inserted into the keyway. Due to the setting of the connecting inclined surface, the cross-section of the connecting key is trapezoidal, so that it is not easy for the connecting key and the drive tube to break. At the same time, during the rotation of the drive tube, the outer wall of the connecting key collides with the elastic rod, so that the elastic rod drives the wheel hub to rotate. Since the elastic rod is elastic, the connecting key can always maintain contact with the elastic rod, and a rigid collision will not occur. In addition, the elastic rod has a buffering effect, which makes the force on the connecting key softer, thereby achieving the purpose of making it difficult for the connecting key and the drive tube to break.

[0008] As a preferred solution of the present invention, the elastic rod includes an elastic part and a sliding rod. The sliding rod is slidably connected to the mounting hole. The elastic part is placed in the mounting hole and one end is fixedly connected to the inner wall of the mounting hole, and the other end is fixedly connected to the sliding rod. The end of the sliding rod extends from the mounting hole and contacts the outer wall of the connecting key.

[0009] To implement the above technical solution, the drive tube is inserted into the wheel hub so that the connecting key is located in the keyway. Through the elastic force of the elastic part, the sliding rod is extended from the mounting hole and maintains contact with the outer wall of the connecting key, so that there will be no empty stroke, and the problem of the connecting key hitting the sliding rod as the drive tube rotates is avoided, thereby avoiding rigid collision and extending the service life.

[0010] As a preferred solution of the present invention, two relatively arranged guide rods are fixedly connected to the inner wall of the mounting hole, and a plurality of guide wheels are rotatably connected to both sides of the slide rod, and the guide wheels are rollingly connected to the guide rods.

[0011] To implement the above technical solution, when the connecting key rotates with the driving tube, the connecting key pushes the slide rod to move, and the guide wheel rolls along the guide rod, thereby making the slide rod move more smoothly, reducing wear and lowering energy consumption. At the same time, since there are multiple guide wheels on a guide rod, the slide rod is less likely to deviate or get stuck during movement.

[0012] As a preferred solution of the present invention, the end of the slide rod away from the elastic member is hemispherical, and a straight groove cooperating with the slide rod is formed on the side wall of the connecting key.

[0013] To implement the above technical solution, the end of the slide rod is placed in the straight groove, which increases the contact area between the slide rod and the connecting key, so that the connection between the slide rod and the connecting key is more stable and tight.

[0014] As a preferred solution of the present invention, a guide arc surface is provided at the end of the straight groove, and the guide arc surface is used to abut against the end of the slide rod.

[0015] To implement the above technical solution, the drive tube is inserted into the wheel hub so that the guide arc surface contacts the end of the slide rod. Through the guiding effect of the guide arc surface, the slide rod can be placed in the straight groove along the guide arc surface to improve the convenience of installation.

[0016] As a preferred solution of the present invention, the blades are arranged in an arc shape and one end is connected to the outer wall of the hub, and the other end is connected to the edge of the impeller body.

[0017] The above technical solution is implemented to increase the water absorption strength.

[0018] As a preferred solution of the present invention, guiding slopes are provided on both sides of the blades to tilt the blades away from the hub.

[0019] By implementing the above technical solution, the water absorption strength is increased during the process of the blades rotating with the hub. At the same time, the water is made to present an acute angle structure between the impeller body and the blades, so that the pressure of the water on the blades along the radial direction of the hub is reduced, thereby enabling the blades to withstand greater strength and extending the service life of the blades.

[0020] As a preferred solution of the present invention, a water diversion groove is provided on the surface of the blade, the water diversion groove is arranged along the length direction of the blade, and the cross section of the water diversion groove is arranged in a semicircular shape.

[0021] By implementing the above technical solution, water can have a tendency to move toward the middle of the water diversion trough, prompting the water to converge, thereby reducing the amount of water remaining on the blade surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the connection structure between the impeller body and the hub in the embodiment;

[0023] Figure 2 This is a schematic diagram showing the structure of the blade;

[0024] Figure 3 To reflect the structural diagram of the keyway;

[0025] Figure 4 To reflect the structural diagram of the mounting hole;

[0026] Figure 5 A schematic diagram showing the connection structure between the slide bar and the elastic member;

[0027] Figure 6 Schematic diagram of the structure of the connecting key.

[0028] Figure numerals: 1. impeller body; 2. hub; 21. through hole; 3. keyway; 31. mounting hole; 4. drive tube; 41. connecting key; 42. connecting slope; 43. straight groove; 44. guide arc surface; 5. elastic rod; 51. elastic part; 52. sliding rod; 61. guide rod; 62. guide wheel; 621. annular groove; 7. blade; 71. guide slope; 72. water diversion groove. DETAILED DESCRIPTION

[0029] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings to make the technical solutions of the present invention easier to understand and grasp.

[0030] A self-priming pump impeller structure comprises a disc-shaped impeller body 1, a coaxially arranged hub 2 is fixedly connected to the impeller body 1, and a circular through hole 21 is provided on the hub 2.

[0031] A keyway 3 with a square cross section is provided on the inner wall of the through hole 21. There are two keyways 3 evenly distributed along the axis of the through hole 21. A drive tube 4 is passed through the wheel hub 2.

[0032] A connecting key 41 is fixedly attached to the outer wall of the drive tube 4. A connecting bevel 42 is defined on the sidewall of the connecting key 41, giving the connecting key 41 a trapezoidal cross-section. The connecting bevel 42 is positioned within the keyway 3. Mounting holes 31 are defined on the inner wall of the keyway 3. Two mounting holes 31 are located on either side of the connecting key 41, with one connecting bevel 42 corresponding to each mounting hole 31. An elastic rod 5 is positioned within the mounting hole 31. The end of the elastic rod 5, extending from the mounting hole 31, maintains contact with the outer wall of the connecting key 41.

[0033] The elastic rod 5 includes an elastic member 51 and a slide rod 52. The slide rod 52 is slidably connected to the mounting hole 31, which has a square cross-section. The elastic member 51 is a spring. The elastic member 51 is placed in the mounting hole 31, with one end of the elastic member 51 fixedly connected to the inner wall of the mounting hole 31 and the other end fixedly connected to the slide rod 52. The end of the slide rod 52 extends from the mounting hole 31 and contacts the outer wall of the connecting key 41.

[0034] Two guide rods 61 are fixedly connected to the inner wall of the mounting hole 31, and the length direction of the guide rods 61 is parallel to the sliding direction of the slide bar 52. Two guide wheels 62 are rotatably connected to both sides of the slide bar 52, and the guide wheels 62 are rollingly connected to the guide rods 61.

[0035] The cross section of the guide rod 61 is circular, and the outer wall of the guide wheel 62 has an annular groove 621. Placing the guide rod 61 in the annular groove 621 allows the slide rod 52 to move smoothly along the length direction of the guide rod 61. At the same time, the slide rod 52 is not easily offset during the movement.

[0036] The end of the slide rod 52, away from the elastic member 51, is hemispherical. A straight groove 43 is defined on the sidewall of the connecting key 41, which engages with the slide rod 52. A guide arc 44 is defined at the end of the straight groove 43. When the drive tube 4 is inserted into the through hole 21, with the connecting key 41 positioned in the keyway 3, the guide arc 44 contacts the end of the slide rod 52. Guided by the guide arc 44, the slide rod 52 slides automatically into the straight groove 43, ensuring that the connecting key 41 always contacts the slide rod 52.

[0037] The outer wall of the impeller body 1 is fixedly connected with blades 7, and two blades 7 are evenly distributed along the axis of the impeller body 1. The blades 7 are arranged in an arc shape and one end is connected to the outer wall of the hub 2, and the other end is connected to the edge of the impeller body 1.

[0038] Both sides of the blade 7 are provided with guiding inclined surfaces 71 to tilt the blade 7 away from the hub 2. A water diversion groove 72 is provided on the surface of the blade 7 and is arranged along the length direction of the blade 7. The cross section of the water diversion groove 72 is arranged in a semicircular shape.

[0039] Of course, the above are only typical examples of the present invention. In addition, the present invention may have many other specific implementation methods. Any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection required by the present invention.

Claims

1. A self-priming pump impeller structure, comprising an impeller body (1), a coaxially arranged hub (2) fixedly connected to the impeller body (1), a keyway (3) being provided on the inner wall of the hub (2), a drive tube (4) passing through the hub (2), blades (7) fixedly connected to the outer wall of the impeller body (1), a plurality of the blades (7) being evenly distributed along the axis of the impeller body (1), and characterized by: A connecting key (41) is fixedly connected to the outer wall of the driving tube (4), a connecting inclined surface (42) is provided on the side wall of the connecting key (41), and the connecting inclined surface (42) is located in the key slot (3). A mounting hole (31) is provided on the inner wall of the key slot (3), and an elastic rod (5) is provided in the mounting hole (31), and one end of the elastic rod (5) extending from the mounting hole (31) contacts the outer wall of the connecting key (41).

2. A self-priming pump impeller structure according to claim 1, characterized in that: The elastic rod (5) includes an elastic member (51) and a sliding rod (52). The sliding rod (52) is slidably connected to the mounting hole (31). The elastic member (51) is placed in the mounting hole (31) and one end is fixedly connected to the inner wall of the mounting hole (31), and the other end is fixedly connected to the sliding rod (52). The end of the sliding rod (52) extends from the mounting hole (31) and contacts the outer wall of the connecting key (41).

3. A self-priming pump impeller structure according to claim 2, characterized in that: Two guide rods (61) arranged opposite to each other are fixedly connected to the inner wall of the mounting hole (31), and a plurality of guide wheels (62) are rotatably connected to both sides of the slide rod (52), and the guide wheels (62) are rollingly connected to the guide rods (61).

4. The self-priming pump impeller structure according to claim 2, characterized in that: The end of the slide rod (52) away from the elastic member (51) is hemispherical, and a straight groove (43) matching with the slide rod (52) is provided on the side wall of the connecting key (41).

5. The self-priming pump impeller structure according to claim 4, characterized in that: The end of the straight groove (43) is provided with a guide arc surface (44), and the guide arc surface (44) is used to contact the end of the sliding rod (52).

6. The self-priming pump impeller structure according to claim 1, characterized in that: The blade (7) is arranged in an arc shape and one end is connected to the outer wall of the hub (2), and the other end is connected to the edge of the impeller body (1).

7. The self-priming pump impeller structure according to claim 6, characterized in that: Both sides of the blade (7) are provided with guiding inclined surfaces (71) to tilt the blade (7) away from the hub (2).

8. The self-priming pump impeller structure according to claim 7, characterized in that: A water diversion groove (72) is provided on the surface of the blade (7). The water diversion groove (72) is arranged along the length direction of the blade (7). The cross section of the water diversion groove (72) is arranged in a semicircular shape.

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