Semi-open type reverse vane impeller of centrifugal pump for conveying dangerous process fluid

Abstract

The utility model relates to the technical field of centrifugal pump impellers, and discloses a semi-open type reverse vane impeller of a centrifugal pump for conveying dangerous process fluid, which comprises a wheel disc, vanes and a circular cylinder, the circular cylinder is connected and fixed on one side surface of the wheel disc, and the circular cylinder is positioned at the central position of the surface of the wheel disc. The blades extend from the inner side of the annular cylinder to the other side of the wheel disc, the number of the blades is five, the blades are evenly distributed on the surface of the wheel disc, and guide grooves are formed among the blades. According to the technical scheme, the unique design of the pentagram-shaped impeller is used, the semi-open type blade faces the rear pump cover, when the blade is abraded, the gap between the blade and the rear pump cover is easily controlled and changed through the pump cover, the gap can be adjusted under the condition that the pump is not disassembled so that the original factory performance can be reset, and the pump is practical and convenient to use. The method is suitable for wide popularization and use.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pump impellers, in particular to a semi-open reverse blade impeller of a centrifugal pump for conveying dangerous process fluids. Background Art

[0002] A centrifugal pump is a pump that transports liquids by the centrifugal force generated by the rotation of the impeller. It can be used in chemical process equipment and papermaking and other fields to transport dangerous industrial fluids at -75℃ to +370℃ or slurries with a certain concentration. The maximum particle diameter is ≤25mm, the maximum soft particle content is ≤35%, and the maximum hard particle content is ≤10%.

[0003] The impeller is an important component of the centrifugal pump, and its performance directly affects the performance of the centrifugal pump. The existing semi-open impeller structure is: the impeller is on the rear cover plate disc, without the front cover plate, and the opening is facing the pump body inlet. When the blades are severely worn, it is necessary to adjust the gap between the blades and the pump cover so that it can pump fluid normally. At this time, the pump body needs to be disassembled, and the adjustment is not convenient. Therefore, we propose a semi-open reverse blade impeller for centrifugal pumps that transport hazardous process fluids. Utility Model Content

[0004] The utility model aims to provide a semi-open reverse blade impeller for a centrifugal pump for conveying hazardous process fluids. By using the unique design of a five-pointed star impeller and making the semi-open blades face backward toward the pump cover, when the blades have wear problems, the gap between the blades and the rear pump cover can be easily controlled and changed through the pump cover, and can be adjusted without disassembling the pump to reset the original factory performance, thereby solving the problems raised in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a semi-open reverse blade impeller of a centrifugal pump for conveying hazardous process fluids, comprising a wheel disc, blades and an annular cylinder, wherein the annular cylinder is circular and connected and fixed to one side surface of the wheel disc, the annular cylinder is located at the center of the wheel disc surface, the blades extend from the inner side of the annular cylinder to the other side of the wheel disc, five blades are arranged and evenly distributed on the surface of the wheel disc, and guide grooves are formed between the blades.

[0006] By adopting the above technical solution, the blades are driven to rotate by the rotation of the wheel, and the fluid is extracted and pumped by the blades. There is no cover plate on the side of the blades facing the pump cover, so the gap between the pump cover and the blades can be adjusted when the pump cover is installed to avoid affecting the extraction effect when the blades are worn.

[0007] Optionally, a positioning block is provided in the middle of the surface of the wheel disc, a positioning hole is opened on the surface of the positioning block, and the positioning hole is located on a side of the wheel disc away from the ring cylinder.

[0008] By adopting the above technical solution, the positioning hole is used to cooperate with the shaft of the centrifugal pump for positioning and installation.

[0009] Optionally, a wheel disc surface of the outer ring of the positioning block is provided with mounting holes, and a plurality of mounting holes are evenly arranged and penetrate the wheel disc.

[0010] By adopting the above technical solution, bolts can be passed through the mounting holes to achieve the purpose of mounting and fixing.

[0011] Optionally, the wheel disc, blades and ring cylinder are connected into an integral structure by casting.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0013] 1. The technical solution of the present application adopts the unique design of a five-pointed star-shaped impeller, and makes the semi-open blades face backward toward the pump cover. When the blades have wear problems, the gap between the blades and the rear pump cover can be easily controlled and changed through the pump cover, and can be adjusted without dismantling the pump to reset the original factory performance.

[0014] 2. The performance and specifications of the technical solution of this application are expanded, the model spectrum is more standardized and clear, the grading is more reasonable, and it is more convenient for users to select; the degree of universalization and standardization is improved, and pumps of the same caliber are small in size and light in weight, saving manufacturing and transportation costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0016] Figure 1 It is a schematic diagram of the front end structure of a semi-open reverse blade impeller of a centrifugal pump for conveying hazardous process fluids according to the utility model;

[0017] Figure 2 It is a schematic diagram of the rear end structure of a semi-open reverse blade impeller of a centrifugal pump for conveying hazardous process fluids according to the utility model;

[0018] Figure 3 It is a schematic diagram of the front end structure of the second embodiment of the semi-open reverse blade impeller of the centrifugal pump for conveying dangerous process fluids of the utility model;

[0019] Figure 4 It is a schematic diagram of the rear end structure of the second embodiment of the semi-open reverse blade impeller of the centrifugal pump for conveying hazardous process fluids according to the utility model.

[0020] In the figure: 1, wheel disc; 11, blade; 111, guide groove; 12, positioning block; 121, positioning hole; 13, mounting hole; 2, ring cylinder. DETAILED DESCRIPTION

[0021] Embodiment 1

[0022] See also Figure 1-2 The utility model provides a technical solution: a semi-open reverse blade impeller of a centrifugal pump for conveying dangerous process fluids, comprising a wheel disc 1, blades 11 and an annular tube 2. A positioning block 12 is provided in the middle of the surface of the wheel disc 1. A positioning hole 121 is provided on the surface of the positioning block 12. The positioning hole 121 is located on the side of the wheel disc 1 away from the annular tube 2. A mounting hole 13 is provided on the surface of the wheel disc 1 on the outer ring of the positioning block 12. A plurality of mounting holes 13 are evenly provided and penetrate the wheel disc 1. During installation, the positioning holes 121 are connected and locked with the shaft body of the centrifugal pump, and bolts are used to cooperate with the mounting holes 13 to assist in locking and fixing the wheel disc 1, so that the wheel disc 1 can be driven to rotate by the shaft body.

[0023] The annular tube 2 is circular and is connected and fixed to the front end surface of the wheel disc 1. The annular tube 2 is located at the center of the front end surface of the wheel disc 1. Five blades 11 of the same size are provided. The blades 11 are evenly distributed and extend from the inner side of the annular tube 2 to the other side of the wheel disc 1. The blades 11 are also evenly distributed on the surface of the wheel disc 1. Guide grooves 111 are formed between the blades 11, so that the impeller as a whole is a five-pointed star impeller. The wheel disc 1, the blades 11 and the annular tube 2 are connected into an integral structure by casting.

[0024] Embodiment 2

[0025] See also Figure 3-4 The utility model provides a technical solution: a semi-open reverse blade impeller of a centrifugal pump for conveying dangerous process fluids, comprising a wheel disc 1, blades 11 and an annular tube 2. A positioning block 12 is provided in the middle of the surface of the wheel disc 1. A positioning hole 121 is provided on the surface of the positioning block 12. The positioning hole 121 is located on the side of the wheel disc 1 away from the annular tube 2. A mounting hole 13 is provided on the surface of the wheel disc 1 on the outer ring of the positioning block 12. A plurality of mounting holes 13 are evenly provided and penetrate the wheel disc 1. During installation, the positioning holes 121 are connected and locked with the shaft body of the centrifugal pump, and bolts are used to cooperate with the mounting holes 13 to assist in locking and fixing the wheel disc 1, so that the wheel disc 1 can be driven to rotate by the shaft body.

[0026] The annular tube 2 is circular and connected and fixed to the front end surface of the wheel disc 1. The annular tube 2 is located at the center of the front end surface of the wheel disc 1. The blades 11 are provided with six blades of the same size. The blades 11 are evenly distributed and extend from the inner side of the annular tube 2 to the other side of the wheel disc 1. The blades 11 are evenly distributed on the surface of the wheel disc 1. Guide grooves 111 are formed between the blades 11, so that the impeller is a hexagonal impeller as a whole. The wheel disc 1, the blades 11 and the annular tube 2 are connected as an integral structure by casting.

[0027] When in use, whether to use a hexagonal or pentagonal impeller is determined according to the flow rate determined by the specific speed and the geometric dimensions of the impeller. Then, the impeller 1 is installed on the shaft of the centrifugal pump through the positioning hole 121 and the mounting hole 13, and the side containing the ring cylinder 2 is directed toward the inlet of the centrifugal pump. When the centrifugal pump is started, the entire structure of the impeller 1 and the blades 11 is driven to rotate, and the fluid enters from the inlet of the centrifugal pump and then enters the inner side of the ring cylinder 2. Under the action of the blades 11, the fluid is thrown to the other side of the impeller 1 along the guide groove 111 and finally discharged from the outlet of the centrifugal pump, thereby achieving the purpose of centrifugal extraction of the fluid.

Claims

1. A semi-open reverse blade impeller for a centrifugal pump for conveying hazardous process fluids, comprising a wheel disc (1), blades (11) and a ring cylinder (2), characterized in that: The annular cylinder (2) is circular and is connected and fixed to a surface of one side of the wheel disc (1). The annular cylinder (2) is located at the center of the surface of the wheel disc (1). The blades (11) extend from the inner side of the annular cylinder (2) to the other side of the wheel disc (1). Five blades (11) are arranged and evenly distributed on the surface of the wheel disc (1). Guide grooves (111) are formed between the blades (11).

2. A semi-open reverse blade impeller for a centrifugal pump for conveying hazardous process fluids according to claim 1, characterized in that: A positioning block (12) is provided in the middle of the surface of the wheel disc (1), a positioning hole (121) is provided on the surface of the positioning block (12), and the positioning hole (121) is located on a side of the wheel disc (1) away from the annular cylinder (2).

3. A semi-open reverse blade impeller for a centrifugal pump for conveying hazardous process fluids according to claim 2, characterized in that: The surface of the wheel disc (1) on the outer ring of the positioning block (12) is provided with mounting holes (13), and a plurality of mounting holes (13) are evenly arranged and penetrate the wheel disc (1).

4. A semi-open reverse blade impeller for a centrifugal pump for conveying hazardous process fluids according to claim 1, characterized in that: The wheel disc (1), blades (11) and annular cylinder (2) are connected to form an integral structure through casting.

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