A self-priming pump

Abstract

This utility model provides a self-priming pump, belonging to the field of water pump technology. It solves the problem of unstable operation caused by the lack of shock absorption and radial force dispersion structures in existing self-priming pumps. This utility model includes a pump casing, a pump body assembly, a connecting frame, a pump impeller, and a drive motor. The pump body assembly includes a front pump body and a rear pump body, which are connected, and the pump impeller is installed inside the pump body assembly. Several guide protrusions are formed on the outer periphery of the rear end of the front pump body, and guide channels are formed in the guide protrusions, communicating with the interior of the pump body assembly. Several first supports are formed on the outer end of the rear pump body. The connecting frame is generally shaped like a frustum with one open side, and a fixed foot is formed at the bottom of the connecting frame. Several second supports are formed on the inner side of the connecting frame. The rear pump body is connected to one side of the connecting frame, and the first and second supports are in close contact. This utility model has the advantages of stable structure, good radial force dispersion, and high efficiency.

Description

Technical Field

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

[0002] A self-priming pump is a centrifugal pump with self-priming capability that can start without additional priming. It automatically draws liquid in by creating negative pressure in the pump chamber through impeller rotation. Widely used in water supply and drainage, agricultural irrigation, and other applications, it provides rapid self-priming, stable water supply, and adaptability to various working conditions, offering a convenient and reliable solution for fluid transport.

[0003] Chinese patent publication number CN207333200U discloses a self-priming pump, including a pump body, a motor, and a pressure tank. The pump body has an inlet and an outlet, and a sequentially connected inlet channel, impeller chamber, and outlet channel are formed on the pump body. The inlet channel, impeller chamber, and outlet channel together form a pressurization channel. The rear end of the pump body is connected to the motor, and the motor shaft is connected to the impeller located in the impeller chamber. The front end of the pump body has a circular protrusion, and the inside of the circular protrusion forms a receiving groove. A connecting column is located at the center of the receiving groove, and a screw hole is located at the center of the connecting column. The screw hole is a blind hole. A protrusion extends from the outer wall of the connecting column to the inner wall of the receiving groove, and the protrusion faces the direction of the outlet channel. A seat also extends from the outer wall of the connecting column, and the seat is the reverse extension of the protrusion on the outer wall of the connecting column.

[0004] The patent provides a self-priming pump in which no intermediate structure is set between the motor and the pump body, and no structure is set to dampen and disperse radial force, which easily leads to insufficient stability during use. Utility Model Content

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

[0006] The objective of this utility model can be achieved through the following technical solution: A self-priming pump includes a pump casing, a pump body assembly, a connecting frame, a pump impeller, and a drive motor. The pump casing is connected to one end of the connecting frame, and the pump body assembly and the pump impeller are installed inside the pump casing. The pump body assembly includes a front pump body and a rear pump body, which are connected together, and the pump impeller is installed inside the pump body assembly. A suction chamber is formed at the front end of the front pump body, and a suction cover is fixedly connected to the front end of the suction chamber. A suction channel is provided between the front pump body and the suction chamber. The rear end of the front pump body is externally... The periphery has several guide protrusions, each with a guide channel that communicates with the inside of the pump body assembly. Several first supports are formed on the outer side of the rear pump body. The connecting frame is shaped like a frustum with one side open and has a fixed foot at its bottom. Several second supports are formed inside the connecting frame. The rear pump body is connected to one side of the connecting frame, and the first and second supports fit together. The drive motor has a motor shaft extending out and passing through the connecting frame and the rear pump body in sequence, connecting to the pump impeller.

[0007] In the aforementioned self-priming pump, an impeller cavity is formed at the inner end of the front pump body, and the pump impeller end is installed in the impeller cavity.

[0008] In the aforementioned self-priming pump, the pump casing is provided with an inlet and an outlet, one end of the inlet cover is connected to an inlet connector which extends out of the inlet, and an outlet connector is fixedly connected to the outlet.

[0009] In the aforementioned self-priming pump, a sealing ring is fitted and connected to the outer side of the rear pump body.

[0010] In the aforementioned self-priming pump, a bearing housing is formed on the rear side of the connecting frame, and a rolling bearing is disposed in the bearing housing.

[0011] Compared with the prior art, the self-priming pump provided by this utility model has the following beneficial effects: 1. The structure in which the first support body on the outer side of the rear pump body and the second support body on the inner side of the connecting frame body fit together disperses the radial force when the pump body is working, reducing the risk of component deformation; 2. The connecting frame body adopts a frustum-shaped design with an opening on one side, which can disperse the weight load of the drive motor and the pump body through this structure, enhancing the overall torsional and impact resistance, and the setting of the first and second support bodies further improves the structural strength of the rear pump body and the connecting frame body itself; 3. Several guide protrusions and corresponding guide channels on the outer periphery of the rear end of the front pump body prevent water flow from forming eddies or impact collisions in the pump casing, greatly reducing hydraulic loss and improving energy conversion efficiency. Attached Figure Description

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

[0013] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the front pump body structure;

[0015] Figure 4 This is a schematic diagram of the rear pump body structure;

[0016] Figure 5 This is a schematic diagram of the connecting frame structure.

[0017] In the diagram: 1. Pump casing; 11. Inlet; 12. Outlet; 2. Pump body assembly; 21. Front pump body; 211. Suction chamber; 212. Suction channel; 213. Guide protrusion; 214. Guide channel; 215. Impeller cavity; 22. Rear pump body; 221. First support body; 3. Connecting frame; 31. Fixed foot; 32. Second support body; 33. Bearing seat; 4. Pump impeller; 5. Drive motor; 51. Motor shaft; 6. Suction cover; 7. Inlet connector; 8. Outlet connector; 9. Sealing ring; 10. Rolling bearing. Detailed Implementation

[0018] 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.

[0019] like Figures 1 to 5 As shown, this embodiment includes a pump casing 1, a pump body assembly 2, a connecting frame 3, a pump impeller 4, and a drive motor 5. The pump casing 1 and the connecting frame 3 are fixedly connected at one end by bolts to form the overall frame structure of the self-priming pump. The pump body assembly 2 and the pump impeller 4 are both installed inside the pump casing 1 to ensure the stable assembly and protection of the pump body assembly 2 and the pump impeller 4.

[0020] like Figures 1 to 5 As shown, the pump body assembly 2 consists of a front pump body 21 and a rear pump body 22. The front pump body 21 and the rear pump body 22 are fastened together. The pump impeller 4 is installed inside the pump body assembly 2. The front end of the front pump body 21 has an integrally formed suction chamber 211. The front end of the suction chamber 211 is fixedly connected to a suction cover 6 by screws. The suction cover 6 can seal and protect the suction chamber 211 to prevent impurities from entering. A suction channel 212 is provided between the front pump body 21 and the suction chamber 211. Several guide protrusions 213 are uniformly integrally formed on the outer periphery of the rear end of the front pump body 21. A through guide channel 214 is provided inside the guide protrusions 213. The guide channel 214 is connected to the inside of the pump body assembly 2 and can guide and divert the liquid in the pump body assembly 2 to reduce the liquid flow resistance.

[0021] like Figures 2 to 5As shown, the rear pump body 22 has several first support bodies 221 integrally formed on the outer side in a circular array. The connecting frame 3 has a frustum-shaped structure with one side opening. This structural design ensures structural strength while reducing overall weight. The bottom of the connecting frame 3 has a fixed foot 31 integrally formed, with mounting holes for fixing the self-priming pump to the designated working position using bolts. The inner side of the connecting frame 3 has several second support bodies 32 integrally formed in a circular array. The rear pump body 22 is connected to the open side of the connecting frame 3 by bolts, and the first support bodies 221 are... The first support 221 and the second support 32 are fitted together in a one-to-one correspondence. Through the fit between the first support 221 and the second support 32, not only can the stability of the connection between the rear pump body 22 and the connecting frame 3 be improved, but the force can also be distributed to avoid local stress concentration. The drive motor 5 is fixed to the other side of the connecting frame 3 by bolts. The drive motor 5 has a motor shaft 51 extending out. The motor shaft 51 passes through the connecting frame 3 and the rear pump body 22 in sequence, and is fixed to the pump impeller 4 by key connection or interference fit to ensure that the power of the drive motor 5 can be stably transmitted to the pump impeller 4 and drive the pump impeller 4 to rotate.

[0022] To elaborate further, such as Figure 3 As shown, an impeller cavity 215 is provided on the inner side of the front pump body 21. The pump impeller 4 is installed in the impeller cavity 215. The size of the impeller cavity 215 is adapted to the end of the pump impeller 4, which can play a positioning and limiting role for the pump impeller 4, preventing radial displacement of the pump impeller 4 during rotation and ensuring operational stability.

[0023] To elaborate further, such as Figure 1 and Figure 2 As shown, the pump casing 1 is provided with an inlet 11 and an outlet 12. The inlet 11 corresponds to the position of the suction chamber 211, and the outlet 12 corresponds to the outlet end of the guide channel 214. One end of the suction cover 6 is connected to an inlet connector 7, which extends out of the inlet 11 for easy connection to an external water inlet pipe. An outlet connector 8 is fixedly connected to the outside of the outlet 12 for easy connection to an external water outlet pipe, thereby achieving efficient liquid transportation.

[0024] To elaborate further, such as Figure 2 and Figure 4 As shown, a sealing ring 9 is sleeved and connected to the outer side of the rear pump body 22. The sealing ring 9 is made of fluororubber and is sandwiched between the rear pump body 22 and the inner wall of the pump housing 1. It can effectively prevent the liquid inside the pump housing 1 from leaking through the gap between the rear pump body 22 and the pump housing 1, thus ensuring the working efficiency of this embodiment.

[0025] To elaborate further, such as Figure 2 and Figure 5As shown, a bearing seat 33 is integrally formed on the rear side of the connecting frame 3. A rolling bearing 10 is interference-fitted in the bearing seat 33. The motor shaft 51 passes through the interior of the rolling bearing 10. The rolling bearing 10 can support the motor shaft 51, reduce the frictional resistance when the motor shaft 51 rotates, and improve the rotational accuracy and service life of the motor shaft 51.

[0026] 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.

[0027] 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 self-priming pump comprising a pump casing (1), a pump body assembly (2), a connecting frame body (3), a pump impeller (4) and a driving motor (5), characterized in that: The pump casing (1) is connected to one end of the connecting frame (3), and the pump body assembly (2) and the pump impeller (4) are installed inside the pump casing (1). The pump body assembly (2) includes a front pump body (21) and a rear pump body (22). The front pump body (21) and the rear pump body (22) are connected, and the pump impeller (4) is installed inside the pump body assembly (2). A water suction chamber (211) is formed at the front end of the front pump body (21). A water suction cover (6) is fixedly connected to the front end of the water suction chamber (211). A water suction channel (212) is opened between the front pump body (21) and the water suction chamber (211). A plurality of flow guide protrusions (213) are formed on the outer periphery of the rear end of the front pump body (21). A flow guide protrusion (213) is provided in the flow guide protrusion (213). There is a flow channel (214) that is connected to the inside of the pump body assembly (2). A plurality of first supports (221) are formed on the outer side of the rear pump body (22). The connecting frame (3) is generally in the shape of a frustum with one side open and a fixed foot (31) is formed at the bottom of the connecting frame (3). A plurality of second supports (32) are formed on the inner side of the connecting frame (3). The rear pump body (22) is connected to one side of the connecting frame (3) and the first supports (221) and the second supports (32) are in contact. The drive motor (5) has a motor shaft (51) extending out and the motor shaft (51) passes through the connecting frame (3) and the rear pump body (22) in sequence and is connected to the pump impeller (4).

2. A self-priming pump according to claim 1, characterized in that: An impeller cavity (215) is formed on the inner side of the front pump body (21), and the pump impeller (4) is installed in the impeller cavity (215).

3. A self-priming pump according to claim 1, characterized in that: The pump casing (1) is provided with an inlet (11) and an outlet (12) respectively. One end of the water suction cover (6) is connected to an inlet connector (7) and the inlet connector (7) extends out of the inlet (11). An outlet connector (8) is fixedly connected to the outlet (12).

4. A self-priming pump according to claim 1, characterized in that: A sealing ring (9) is fitted and connected to the outer side of the rear pump body (22).

5. A self-priming pump according to claim 1, characterized in that: A bearing seat (33) is formed on the rear side of the connecting frame (3), and a rolling bearing (10) is provided in the bearing seat (33).

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