Centrifugal pump volute

Abstract

The utility model relates to a centrifugal pump volute which comprises an outer volute body, an inner volute body, a flange, a bolt and a replacement outer volute body, the outer volute body, the inner volute body and the replacement outer volute body are split parts which are respectively cast and machined, the replacement outer volute body is a volute body of the replacement outer volute body, and when the centrifugal pump volute is used, one of the outer volute body and the replacement outer volute body is selected to be combined with the inner volute body; flanges are arranged on the combination faces of the outer volute and the inner volute, the outer volute and the inner volute are attached through the flanges and then connected through bolts to form a complete volute wall face, and sealing devices are arranged on the combination faces of the outer volute and the inner volute. Or the joint surfaces of the replacement outer volute and the inner volute are provided with flanges, the replacement outer volute and the inner volute are attached through the flanges and then connected through bolts to form a complete volute wall surface, and the joint surfaces of the replacement outer volute and the inner volute are provided with sealing devices. Different volute assemblies are selected to be assembled according to different design working conditions, the universality of parts is improved, and the research, development and production cost of pump products is reduced; the overall structure is simple, and machining and assembling are convenient.

Description

Technical Field

[0001] This utility model relates to a volute, specifically a centrifugal pump volute that features good part versatility, reduces pump product development and production costs, has a simple overall structure, and is easy to process and assemble. Background Technology

[0002] The volute is a crucial component of a centrifugal pump, responsible for collecting the liquid exiting the impeller, eliminating rotational motion, and converting velocity energy into pressure energy. The streamline design of the volute's flow channel significantly impacts hydraulic losses, while the throat area greatly influences the pump's high-efficiency point efficiency and its location. In engineering design, it is often necessary to design volute models with different streamline shapes and throat areas based on varying operating conditions. This hinders product standardization, parts versatility, and reduces pump model development costs. Utility Model Content

[0003] To address the aforementioned problems, the main objective of this utility model is to provide a centrifugal pump volute that offers advantages such as good component versatility, reduced pump product development and production costs, simple overall structure, and convenient processing and assembly.

[0004] This utility model solves the above-mentioned technical problems through the following technical solution: a centrifugal pump volute, the centrifugal pump volute comprising: an outer volute, an inner volute, a flange, bolts, and a replacement outer volute, wherein the outer volute, inner volute, and replacement outer volute are separately cast and machined parts, and the replacement outer volute is a volute that replaces the outer volute. In use, either the outer volute or the replacement outer volute is selected to be combined with the inner volute.

[0005] Both the outer and inner volutes are fitted with flanges at their mating surfaces. The two volutes are then bolted together to form a complete volute wall. A sealing device is provided at the mating surfaces of the two volutes.

[0006] Alternatively, flanges can be provided at the mating surfaces of the outer and inner volutes. After the two are fitted together by flanges, they are bolted together to form a complete volute wall. Sealing devices are provided at the mating surfaces of the two.

[0007] In a specific embodiment of this utility model, the sealing device consists of a sealing groove and a sealing strip, with the sealing strip installed inside the sealing groove.

[0008] In a specific embodiment of this utility model, the sealing groove is formed on the outer volute, the inner volute, or a replacement outer volute.

[0009] In a specific embodiment of this utility model, when the outer volute and the inner volute are combined, the flange on the surface where the outer volute and the inner volute are combined is a curved surface, and the curved surface is provided with a countersunk structure. Bolts pass through the countersunk structure to fix the outer volute and the inner volute.

[0010] In a specific embodiment of this utility model, when the outer volute and inner volute are replaced, the flange on the surface where the outer volute and inner volute are joined is curved, and the curved surface is provided with a countersunk structure. Bolts pass through the countersunk structure to fix the outer volute and inner volute.

[0011] In a specific embodiment of this utility model, the spiral lines of the outer volute, the spiral lines of the replacement outer volute and the diffuser section, and the spiral lines at the tongue of the centrifugal pump are kept smooth.

[0012] The positive and progressive effects of this utility model are as follows: Compared with common technologies, the centrifugal pump volute provided by this utility model has the following advantages: This utility model allows for the selection and assembly of different volute components according to different design conditions, improving the versatility of parts and reducing the research and development and production costs of pump products. The overall structure is simple and easy to process and assemble. Attached Figure Description

[0013] Figure 1 This is a rendering of the overall assembly diagram of this utility model.

[0014] Figure 2 This is a line drawing illustrating the overall assembly of this utility model.

[0015] Figure 3 This is a partial assembly diagram of the present invention.

[0016] Figure 4-1 This is a rendering of the flange installation schematic diagram of this utility model.

[0017] Figure 4-2 This is a line drawing illustrating the flange installation of this utility model.

[0018] Figure 5 This is a schematic diagram of the hydraulic design of this utility model.

[0019] The following are the names corresponding to the reference numerals in this utility model:

[0020] 1. Outer volute 2. Inner volute 3. Flange 4. Bolt 5. Replacement outer volute 6. Sealing groove 7. Sealing strip 8. Outer volute spiral 9. Replacement outer volute spiral 10. Flange face curve 11. Diffusion section spiral 12. Tongue-mounted spiral Detailed Implementation

[0021] The preferred embodiments of this utility model are given below with reference to the accompanying drawings to illustrate the technical solution of this utility model in detail.

[0022] Figure 1 This is a rendering of the overall assembly diagram of this utility model. Figure 2The above figure is a line drawing illustrating the overall assembly of this utility model. As shown in the figure, this utility model proposes a centrifugal pump volute structure, which includes an outer volute 1, an inner volute 2, a flange 3, bolts 4, a replacement outer volute 5, a sealing groove 6, and a sealing strip 7.

[0023] The outer volute 1, the replacement outer volute 5, and the inner volute 2 of this utility model are respectively cast and machined; the outer volute 1 and the inner volute 2 are connected by flange 3 and bolt 4 to form a complete volute wall. In the specific implementation process, in order to achieve better installation effect, bolt 4 can be used with nuts.

[0024] Figure 3 This is a partial assembly diagram of the present invention, as shown below. Figure 3 As shown, sealing grooves 6 are provided on the flanges of the outer volute 1 and the inner volute 2. A rubber sealing strip 7 is inserted into the sealing groove 6 to achieve a seal at the assembly surface. To adapt to different operating parameters, the outer volute 1 can be removed and replaced with a replacement outer volute 5, thereby changing the pump's flow cross-section and throat area.

[0025] In practical implementation, the width of the sealing groove 6 can be 3-10mm, and the depth of the sealing groove 6 can be 5-15mm. The specific width and depth of the sealing groove can be designed according to the actual size of the volute. In practical implementation, the rubber sealing strip 7 can be a rectangular or "O" shaped sealing strip.

[0026] Figure 4-1 This is a rendering illustrating the flange installation of this utility model. Figure 4-2 The above figure shows a line drawing illustrating the flange installation of this utility model. The assembly flange 3 of this utility model is curved, therefore it is provided with a countersunk structure 13 to ensure the bolts 4 are secure.

[0027] Figure 5 This is a schematic diagram of the hydraulic design of this utility model, as shown below. Figure 5 As shown, the flange face curve 10 remains consistent across different outer volute designs to ensure consistent installation dimensions and compatibility with the inner volute. The outer volute helix 8 and the replacement outer volute helix 9 should maintain a smooth connection with the diffuser section helix 11 and the tongue-mounted helix 12 to ensure uniform variation in the cross-sectional area of ​​the volute. The connection surfaces between the outer volute and the replacement outer volute and the inner volute should be smooth to reduce hydraulic losses.

[0028] In the specific implementation of this utility model, a nameplate for easy identification can be provided on the outer volute 1 or the replacement outer volute 5, and raised strips to increase friction and facilitate handling can also be provided on the outer volute 1 or the replacement outer volute 5. In the specific implementation of this utility model, the outer volute 1, the replacement outer volute 5, and the inner volute 2 can be made of different materials according to different hydraulic characteristics.

[0029] In the specific implementation of this utility model, the width of the flange on the outer volute 1 or the flange on the inner volute 2 is generally the same, and the width and thickness of the flange can be designed according to the actual size of the volute.

[0030] This utility model selects different volute components for assembly according to different design conditions, which improves the versatility of parts and reduces the R&D and production costs of pump products; the overall structure of this utility model is simple and easy to process and assemble.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A centrifugal pump casing, characterized in that: The centrifugal pump casing includes: an outer volute (1), an inner volute (2), a flange (3), bolts (4), and a replacement outer volute (5). The outer volute (1), the inner volute (2), and the replacement outer volute (5) are separately cast and machined parts. The replacement outer volute (5) is a volute that replaces the outer volute (1). In use, either the outer volute (1) or the replacement outer volute (5) is combined with the inner volute (2). Flanges are provided on the mating surfaces of the outer volute (1) and the inner volute (2). The two are connected by bolts (4) after being fitted together by the flanges to form a complete volute wall. A sealing device is provided on the mating surfaces of the two. Alternatively, flanges can be provided on the mating surfaces of the outer volute (5) and the inner volute (2). After the two are fitted together by the flanges, they are connected by bolts (4) to form a complete volute wall. A sealing device is provided on the mating surfaces of the two.

2. The centrifugal pump casing according to claim 1, characterized in that: The sealing device consists of a sealing groove (6) and a sealing strip (7), with the sealing strip (7) installed inside the sealing groove (6).

3. The centrifugal pump casing according to claim 2, characterized in that: The sealing groove (6) is opened on the outer volute (1), the inner volute (2), or the replacement outer volute (5).

4. The centrifugal pump casing according to claim 1, characterized in that: When the outer volute (1) and the inner volute (2) are combined, the flange (3) on the surface where the outer volute (1) and the inner volute (2) are combined is a curved surface. The curved surface is provided with a countersunk structure (13). The bolt (4) passes through the countersunk structure (13) to fix the outer volute (1) and the inner volute (2).

5. The centrifugal pump casing according to claim 1, characterized in that: When the replacement outer volute (5) and inner volute (2) are combined, the flange (3) on the surface where the replacement outer volute (5) and inner volute (2) are combined is a curved surface. The curved surface is provided with a countersunk structure (13). The bolt (4) passes through the countersunk structure (13) to fix the replacement outer volute (5) and inner volute (2).

6. The centrifugal pump casing according to claim 1, characterized in that: The spiral lines (8) of the outer volute of the centrifugal pump casing, the spiral lines (9) of the replacement outer volute, the spiral lines (11) of the diffuser section, and the spiral lines (12) at the tongue of the centrifugal pump casing are kept smooth.

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