Double-volute-chamber pump shell structure and water pump

Abstract

The utility model discloses a double-volute-chamber pump shell structure which comprises a pump shell with a water outlet, a pump chamber is arranged in the pump shell, a splitter plate is arranged in the water outlet so that a volute chamber runner I communicated with the inside of the pump chamber and a volute chamber runner II communicated with the outside of the pump shell can be formed in the water outlet, and a volute chamber runner III communicated with the inside of the pump chamber is further formed in the pump shell. A flow channel connecting pipe is arranged outside the pump shell, and the two ends of the flow channel connecting pipe communicate with the volute chamber flow channel II and the volute chamber flow channel III correspondingly. The utility model further discloses a water pump adopting the double-volute-chamber pump shell structure. The casting mold is simple in structure, not only facilitates casting molding, but also facilitates sand cleaning through the short runner, and is more convenient to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of water pumps, in particular to a double volute pump housing structure and a water pump. Background Art

[0002] One of the key factors for the reliability of a bracket pump is the balance of the hydraulic radial force, and the balance of the radial force usually adopts a double volute structure. However, the flow channels of the double volute structure are very narrow and long. As Figure 1 shown, the casting of the housing is relatively difficult, defects are likely to occur and it is difficult to clean the sand completely. It is often necessary to separately open some sand cleaning windows to clean it up. This limits some pumps with large hydraulic radial forces from adopting the double volute structure, and it is necessary to thicken the shaft diameter, etc. to adapt. Summary of the Utility Model

[0003] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the utility model is: how to provide a double volute pump housing structure that is convenient for sand cleaning of the flow channel.

[0004] In order to solve the above technical problem, the technical solution adopted by the utility model is:

[0005] A double volute pump housing structure includes a pump housing with a water outlet. The inside of the pump housing is a pump chamber. A flow dividing plate is arranged in the water outlet so as to form a volute flow channel I communicating with the inside of the pump chamber and a volute flow channel II communicating with the outside of the pump housing in the water outlet. A volute flow channel III communicating with the inside of the pump chamber is also arranged on the pump housing. A flow channel connecting pipe is arranged outside the pump housing, and both ends of the flow channel connecting pipe are respectively communicated with the volute flow channel II and the volute flow channel III.

[0006] The utility model changes the narrow and long flow channels in the prior art into two short flow channel structures that are convenient for sand cleaning and casting. The outside is connected by a connecting pipe, and the structure is simple and the installation is convenient.

[0007] As an optimization, the volute flow channel I and the volute flow channel III are respectively communicated with the pump chamber of the pump housing along the tangential direction of the impeller rotation in the pump chamber.

[0008] As an optimization, connection bosses are respectively formed in a protruding manner on the outer surface of the pump housing at positions corresponding to the volute flow channel II and the volute flow channel III. Connecting flanges are respectively installed at both ends of the flow channel connecting pipe. The connecting flanges at both ends of the flow channel connecting pipe and the corresponding connection bosses are fixedly and sealingly connected by connecting bolts. When sealing the connection bosses and the connecting flanges, a sealing groove can be arranged on the flange, and then the sealing ring is installed in the sealing groove. After the flange is fixed on the connection boss by the connecting bolt, the sealing is realized by extruding the sealing ring.

[0009] As an optimization, an outwardly expanding horn-shaped outlet cavity is arranged at one end of the volute flow channel III far away from the pump chamber.

[0010] The present utility model also discloses a water pump, which adopts the double volute pump casing structure as described above.

[0011] Compared with the prior art, the structure of the present utility model is simple, which is not only convenient for casting and forming, but also the short flow path is convenient for sand cleaning, and the operation is more convenient. Brief Description of the Drawings

[0012] Figure 1 It is a schematic internal structure diagram of the double volute pump casing structure in the prior art;

[0013] Figure 2 It is a schematic internal structure diagram of the present utility model. Detailed Description of the Embodiments

[0014] In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but only represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0015] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance. In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0016] As Figure 2 shown, the double-vortex chamber pump housing structure in this specific embodiment includes a pump housing 1 with a water outlet. The inside of the pump housing 1 is a pump chamber. A flow dividing plate 2 is arranged in the water outlet so as to form a vortex chamber flow path I communicating with the inside of the pump chamber and a vortex chamber flow path II communicating with the outside of the pump housing 1 in the water outlet. A vortex chamber flow path III communicating with the inside of the pump chamber is also provided on the pump housing 1. A flow path connecting pipe 3 is arranged outside the pump housing 1. The two ends of the flow path connecting pipe 3 are respectively communicated with the vortex chamber flow path II and the vortex chamber flow path III.

[0017] In this specific embodiment, the vortex chamber flow path I and the vortex chamber flow path III are respectively communicated with the pump chamber along the tangential direction of the impeller rotation in the pump chamber.

[0018] In this specific embodiment, connection bosses 4 are formed by protruding on the outer surface of the pump housing 1 corresponding to the positions of the vortex chamber flow path II and the vortex chamber flow path III. Connection flanges 5 are respectively installed at the two ends of the flow path connecting pipe 3. The connection flanges 5 at the two ends of the flow path connecting pipe 3 and the corresponding connection bosses 4 are fixedly and sealedly connected by connection bolts respectively.

[0019] In this specific embodiment, an outwardly expanding horn-shaped outlet cavity is provided at one end of the volute flow channel III away from the pump chamber.

[0020] A water pump adopts the double-volute pump housing structure as described above.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described by referring to the preferred embodiments of the present invention, those of ordinary skill in the art should understand that various changes can be made in form and details without departing from the spirit and scope of the present invention defined by the appended claims.

Claims

1. A double-vortex chamber pump housing structure, including a pump housing with a water outlet, and the inside of the pump housing is a pump chamber, characterized in that: A flow splitting plate is arranged inside the water outlet so as to form a volute flow channel Ⅰ communicating with the pump chamber and a volute flow channel Ⅱ communicating with the outside of the pump housing inside the water outlet. A volute flow channel Ⅲ communicating with the pump chamber is also formed on the pump housing. A flow channel connecting pipe is arranged outside the pump housing, and two ends of the flow channel connecting pipe are respectively communicated with the volute flow channel Ⅱ and the volute flow channel Ⅲ.

2. The double-vortex-chamber pump housing structure according to claim 1, wherein: The volute flow channel Ⅰ and the volute flow channel Ⅲ are respectively communicated with the pump chamber along the tangential direction of the impeller rotation in the pump chamber.

3. The double-vortex chamber pump housing structure according to claim 1, characterized in that: Connecting bosses are respectively formed in a protruding manner at positions corresponding to the volute flow channel Ⅱ and the volute flow channel Ⅲ on the outer surface of the pump housing. Connecting flanges are respectively installed at two ends of the flow channel connecting pipe, and the connecting flanges at two ends of the flow channel connecting pipe and the corresponding connecting bosses are fixedly and sealingly connected through connecting bolts respectively.

4. The double-volute pump casing structure according to claim 1, wherein: An outwardly expanding trumpet-shaped outlet cavity is arranged at one end of the volute flow channel Ⅲ far away from the pump chamber.

5. A water pump, characterized in that: The double-volute pump housing structure described in any one of claims 1 to 4 is adopted.

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