Ceramic pump

Abstract

The utility model provides a ceramic pump, which belongs to the technical field of slurry pumps and comprises a metal pump shell, a ceramic overflowing component is sleeved in the metal pump shell, and a lining layer is adhered between the metal pump shell and the ceramic overflowing component and is used for transmitting impact force on the ceramic overflowing component to the metal pump shell. According to the ceramic pump provided by the utility model, the ceramic overflowing assembly is used, so that the wear resistance and the corrosion resistance of pump parts are greatly improved, and meanwhile, the overall weight of the pump parts is reduced, so that the pump parts are convenient to transport.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of slurry pump, more specifically, relates to a ceramic pump. BACKGROUND

[0002] Slurry pump is a kind of mechanical equipment that makes the energy of solid-liquid mixed medium increase by the action of centrifugal force (rotation of impeller of pump). Slurry pump is widely used in mining, power plant, dredging, metallurgy, chemical industry, building materials and petroleum industry fields, and can transport liquid mixture containing high-density solid particles, and handle waste and sewage of various industries.

[0003] At present, in the common slurry pump in market, the flow part in pump is usually made of metal material, and the pump parts made of metal material are difficult to consider wear resistance and corrosion resistance, in order to improve the material performance of metal pump parts, it is necessary to increase the proportion of some noble metals such as nickel in metal material, so as to continuously improve the manufacturing cost of metal pump parts, in addition, the pump parts made of metal material are heavy, which is not conducive to transportation. UTILITARIAN CONTENT

[0004] The utility model aims at providing a kind of ceramic pump, to solve the technical problems, such as the weight of metal pump, wear resistance and corrosion resistance difficult to consider in prior art.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is: a ceramic pump is provided, comprising a metal pump shell, a ceramic flow assembly is sleeved in the metal pump shell, an inner lining layer is bonded between the metal pump shell and the ceramic flow assembly, and the inner lining layer is used to transmit the impact force received by the ceramic flow assembly to the metal pump shell.

[0006] In one possible implementation, the ceramic flow assembly includes a ceramic sheath, a ceramic impeller, a ceramic front guard plate and a ceramic rear guard plate, the ceramic impeller is located in the inner cavity of the ceramic sheath, the ceramic sheath is sleeved in the inner cavity of the metal pump shell, the ceramic front guard plate and the ceramic rear guard plate are respectively arranged on the ports on the axial two sides of the ceramic sheath, and the inner lining layer is bonded between the ceramic sheath and the metal pump shell and between the ceramic front guard plate and the metal pump shell.

[0007] In one possible implementation, the inner lining layer is a resin-silicon carbide composite material layer.

[0008] In a possible implementation, the ceramic back shield comprises a shield skeleton and a ceramic flow portion bonded to the shield skeleton, the ceramic flow portion is inserted into a port on one axial side of the ceramic sheath, the shield skeleton is inserted into a port on one axial side of the metal pump shell, the metal pump shell and the shield skeleton on the same side are provided with a combination plate, and the metal pump shell and the shield skeleton are fixedly connected with the combination plate.

[0009] In a possible implementation, the ceramic impeller comprises a ceramic main body, the ceramic main body comprises a front cover plate and a rear cover plate arranged at intervals in the axial direction, a plurality of main blades are connected at intervals between the front cover plate and the rear cover plate, and an impeller flow channel is formed between adjacent main blades, a water suction port communicating with the plurality of impeller flow channels is arranged in the middle of the front cover plate in the axial direction, and a metal connecting piece is inserted into the middle of the rear cover plate in the axial direction, and the metal connecting piece is used for connecting a power shaft.

[0010] In a possible implementation, the metal connecting piece penetrates through the rear cover plate and comprises a connecting section and a plugging head connected with each other, the connecting section is provided with a threaded hole used for connecting the power shaft, the plugging head is connected to one end of the connecting section close to the front cover plate, one end of the plugging head facing the front cover plate is provided with a convex surface protruding outward, an edge of the convex surface is arranged in a shape following an inner side wall of the rear cover plate, and a ceramic coating is arranged on the convex surface.

[0011] In a possible implementation, the connecting section is in a T-shaped structure or the cross section of the connecting section is in a polygonal structure.

[0012] In a possible implementation, an end surface of the rear cover plate on a side facing the front cover plate is further provided with a secondary blade, the secondary blade is located between two adjacent main blades, and the number and arrangement of the secondary blades are the same as those of the main blades.

[0013] In a possible implementation, a sealing box is arranged between the combination plate and the shield skeleton, and the sealing box is provided with a sealing groove on a side facing the shield skeleton, and a ceramic coating is arranged on an inner wall of the sealing groove.

[0014] In a possible implementation, a plurality of ceramic back ribs are arranged on a side of the ceramic flow portion facing the sealing groove, the ceramic back ribs extend in the radial direction of the ceramic flow portion, and the plurality of ceramic back ribs are arranged in a circle around a central axis of the ceramic flow portion.

[0015] The ceramic pump has the advantages that, compared with the prior art, the ceramic pump uses a ceramic flow assembly, the performance of pump parts in terms of wear resistance and corrosion resistance is greatly improved, and the overall weight of the pump parts is reduced, so that the pump parts are convenient to transport. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A cross-sectional structural schematic diagram of a ceramic pump provided for an embodiment of this utility model;

[0018] Figure 2 A partial cross-sectional view of a ceramic pump provided in an embodiment of this utility model;

[0019] Figure 3 A cross-sectional view of the ceramic impeller provided in an embodiment of this utility model;

[0020] Figure 4 A schematic diagram of the layout structure of the main blades and auxiliary blades on the ceramic impeller provided in an embodiment of this utility model;

[0021] Figure 5 A cross-sectional view of the connection structure of the metal pump casing, ceramic rear guard plate, and connecting plate provided in an embodiment of this utility model;

[0022] Figure 6 A cross-sectional view of the connection structure between the ceramic rear guard plate and the sealing box provided in an embodiment of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Metal pump casing; 2. Ceramic jacket; 3. Ceramic impeller; 31. Front cover plate; 32. Mounting part; 32. Rear cover plate; 33. Main blade; 34. Secondary blade; 4. Ceramic front guard plate; 5. Ceramic rear guard plate; 51. Ceramic flow passage; 52. Guard plate frame; 53. Ceramic back rib; 6. Sealing box; 61. Sealing groove; 7. Drive shaft; 8. Connecting plate; 9. Bracket body; 10. Inner liner; 11. Connecting section; 12. Sealing head; 13. Ceramic coating; Detailed Implementation

[0025] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] It is to be noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0027] It is to be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate directions or positions based on the directions or positions shown in the drawings and are used for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application.

[0028] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and cannot be construed as indicating or implying relative importance or implying a specific number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0029] Please refer to Figures 1 to 2 A ceramic pump provided by the present application will be described. The ceramic pump comprises a metal pump shell 1, a ceramic flow assembly is sleeved in the metal pump shell 1, and an inner lining layer 10 is bonded between the metal pump shell 1 and the ceramic flow assembly, and the inner lining layer 10 is used to transmit the impact force received by the ceramic flow assembly to the metal pump shell 1. The inner lining layer 10 is a resin-silicon carbide composite material layer, which is mainly made of high molecular resin, silicon carbide and the like, has high bonding strength with metal and non-metal substrates, has excellent bonding performance, can better bond and fix the metal pump shell 1 and the ceramic flow part 51, and has excellent wear resistance, excellent corrosion resistance and extremely convenient construction performance, thereby ensuring the bonding effect. In the operation process, the pressure and impact received by the ceramic flow part 51 can be quickly transmitted to the metal pump shell 1 through the inner lining layer 10 for release, which is equivalent to increasing the toughness of the ceramic flow part 51, so that the ceramic flow part 51 is protected, and the disadvantage of high brittleness and easy breakage of ceramic material is solved.

[0030] In the embodiment, the ceramic material used in the ceramic flow assembly is silicon nitride-silicon carbide composite sintered ceramic, which has a Mohs hardness of about 9, is good in strength, low in expansion, high in thermal conductivity, good in insulation, long in service life, strong in corrosion resistance, oxidation resistance and erosion resistance, and can be used in recommended working conditions to increase the service life by 2-6 times compared with ordinary wear-resistant cast iron. Specifically, the ceramic flow assembly 51 comprises a ceramic sheath 2, a ceramic impeller 3, a ceramic front guard plate 4 and a ceramic rear guard plate 5. The ceramic impeller 3 is located in the inner cavity of the ceramic sheath 2, the ceramic sheath 2 is sleeved in the inner cavity of the metal pump shell 1, and the ceramic front guard plate 4 and the ceramic rear guard plate 5 are respectively arranged on the ports at the two axial ends of the ceramic sheath 2. The inner lining layer 10 is bonded between the ceramic sheath 2 and the metal pump shell 1 and between the ceramic front guard plate 4 and the metal pump shell 1.

[0031] In some embodiments, referring to Figures 1 to 3 The ceramic impeller 3 comprises a ceramic body, which comprises a front cover plate 31 and a rear cover plate 32 arranged axially at intervals, and a plurality of main blades 33 connected at intervals between the front cover plate 31 and the rear cover plate 32. Adjacent main blades 33 form an impeller flow channel. A water suction port is arranged in the middle of the front cover plate 31 along the axial direction thereof and communicates with the plurality of impeller flow channels. A metal connecting piece is inserted into the middle of the rear cover plate 32 along the axial direction thereof and is used to connect the power shaft 7.

[0032] Specifically, an installation portion 321 is arranged in the middle of the end of the rear cover plate 32 away from the front cover plate 31. The metal connecting piece is connected to the installation portion 321. The metal connecting piece comprises a connecting segment 11 and a plugging head 12 connected to each other. The connecting segment 11 is provided with a threaded hole used to connect the power shaft 7. The plugging head 12 is connected to the end of the connecting segment 11 close to the front cover plate 31. The end of the plugging head 12 facing the front cover plate 31 has a convex surface protruding outward. The edge of the convex surface is arranged in the same shape as the inner side wall of the rear cover plate 32. A ceramic coating 13 is arranged on the convex surface to increase the wear resistance and corrosion resistance. In the embodiment, the connecting segment 11 is arranged in a T-shaped structure or a columnar structure with a polygonal cross section to improve the torque transmission performance and axial force resistance between the metal connecting piece and the ceramic body. In addition, a bonding layer is arranged between the metal connecting piece and the ceramic body. The bonding layer is used to bond and fix the metal connecting piece and the ceramic body. In application, the bonding layer is made of the same material as the inner lining layer 10.

[0033] In application, the power shaft 7 is arranged in the threaded hole in the connecting segment 11 and is fixedly connected to the connecting segment 11 by screwing. A ceramic coating 13 is also arranged on the end face of the installation portion 321 facing the power shaft 7 to increase the wear resistance and corrosion resistance.

[0034] In some embodiments, referring to Figure 3 and Figure 4A sub-vane 34 is further arranged on the end surface of the rear cover plate 32 towards the front cover plate 31, the sub-vane 34 is located between two adjacent main vanes 33, the number and arrangement of the sub-vane 34 are the same as those of the main vane 33. By arranging the sub-vane 34, the flow passage of the impeller is divided, the volume rate of the flow passage of the impeller is changed, and the ceramic impeller 3 can obtain greater injection lift during operation, and the hydraulic performance is improved.

[0035] In some embodiments, referring to Figure 2 and Figure 5 、 Figure 6 The ceramic rear cover plate 5 described above comprises a cover plate skeleton 52 and a ceramic flow part 51 bonded to the cover plate skeleton 52. In this embodiment, the ceramic flow part 51 is a disc-shaped structure mounted on the port on one axial side of the ceramic sheath 2. The cover plate skeleton 52 is a ring-shaped structure connected to one end of the ceramic flow part 51 away from the ceramic sheath 2. In application, the cover plate skeleton 52 is mounted on the port on one axial side of the metal pump shell 1. In this embodiment, the cover plate skeleton 52 is a metal product. The cover plate skeleton 52 and the ceramic flow part 51 are fixed by a bonding layer. The bonding layer is made of the same material as the inner lining 10 described above. In application, a combination plate 8 is arranged on the same side of the metal pump shell 1 and the cover plate skeleton 52. The combination plate 8 is a metal plate. One end of the combination plate 8 is fixedly connected to the bracket body 9, and the other end is fixedly connected to the metal pump shell 1 and the cover plate skeleton 52. A sealing box 6 is arranged between the combination plate 8 and the ceramic rear cover plate 5. One end of the sealing box 6 abuts against the combination plate 8, and the other end abuts against the cover plate skeleton 52. Through the above arrangement, the positioning of the metal pump body, the ceramic rear cover plate 5 and the sealing box 6 is metal-to-metal contact positioning, thereby avoiding the pre-tightening force generated when the ceramic and metal are in contact, thereby generating stress inside the ceramic parts, which can easily cause damage or reduce the toughness of the ceramic parts.

[0036] In some embodiments, a sealing groove 61 is arranged on the side of the sealing box 6 towards the cover plate skeleton 52. The sealing groove 61 and the ceramic flow part 51 form a sealing cavity. In application, a ceramic coating 13 is arranged on the inner wall of the sealing groove 61 to increase its wear resistance and corrosion resistance. A ceramic back rib 53 is arranged on the end surface of the ceramic flow part 51 towards the sealing box 6. The ceramic back rib 53 extends radially on the end surface of the ceramic flow part 51. In this embodiment, the number of ceramic back ribs 53 is multiple. The multiple ceramic back ribs 53 are arranged circumferentially around the central axis of the ceramic flow part 51. By arranging the ceramic back rib 53, the pressure at the position of the sealing box 6 in the pump cavity can be reduced, the sealing effect is better, the sealing box 6 is more wear-resistant and corrosion-resistant, and the service life is longer.

[0037] The utility model provides a kind of ceramic pump, compared with prior art, ceramic flow component is used, so that pump parts in wear resistance and corrosion resistance both aspects performance are greatly promoted, while reducing the overall weight of pump piece, so that it is convenient to transport.

[0038] The above only is the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement and improvement etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A ceramic pump characterized by, The metal pump shell (1) is internally sleeved with a ceramic flow assembly, and an inner lining layer (10) is bonded between the metal pump shell (1) and the ceramic flow assembly, the inner lining layer (10) is used for transmitting the impact force received by the ceramic flow assembly to the metal pump shell (1), and the inner lining layer (10) is a resin-silicon carbide composite material layer. The ceramic flow assembly comprises a ceramic sheath (2), a ceramic impeller (3), a ceramic front guard plate (4) and a ceramic rear guard plate (5), the ceramic impeller (3) is located in the inner cavity of the ceramic sheath (2), the ceramic sheath (2) is sleeved in the inner cavity of the metal pump shell (1), the ceramic front guard plate (4) and the ceramic rear guard plate (5) are respectively arranged on the ports on the axial two sides of the ceramic sheath (2), and the inner lining layer (10) is bonded between the ceramic sheath (2) and the metal pump shell (1) and between the ceramic front guard plate (4) and the metal pump shell (1). The ceramic impeller (3) comprises a ceramic main body, the ceramic main body comprises a front cover plate (31) and a rear cover plate (32) which are arranged at intervals in the axial direction, a plurality of main blades (33) are connected at intervals between the front cover plate (31) and the rear cover plate (32), impeller flow channels are formed between adjacent main blades (33), a water suction port which communicates with a plurality of the impeller flow channels is arranged in the middle of the front cover plate (31) in the axial direction, and a metal connecting piece is inserted into the middle of the rear cover plate (32) in the axial direction, the metal connecting piece is used for connecting a power shaft (7). The metal connecting piece penetrates through the rear cover plate (32) and comprises a connecting section (11) and a plugging head (12) which are connected to each other, the connecting section (11) is provided with a threaded hole used for connecting the power shaft (7), the plugging head (12) is connected to one end of the connecting section (11) close to the front cover plate (31), one end of the plugging head (12) facing the front cover plate (31) has a convex surface which protrudes outward, the edge of the convex surface is arranged in a shape following the inner side wall of the rear cover plate (32), and a ceramic coating (13) is arranged on the convex surface, and the connecting section (11) has a T-shaped structure.

2. A ceramic pump as claimed in claim 1, wherein The ceramic rear guard plate (5) comprises a guard plate framework (52) and a ceramic flow part (51) bonded to the guard plate framework (52), the ceramic flow part (51) is inserted into the port on one axial side of the ceramic sheath (2), the guard plate framework (52) is inserted into the port on one axial side of the metal pump shell (1), the same side of the metal pump shell (1) and the guard plate framework (52) is provided with a combination plate (8), and the metal pump shell (1) and the guard plate framework (52) are fixedly connected with the combination plate (8).

3. A ceramic pump as claimed in claim 1, wherein The cross section of the connecting section (11) has a polygonal structure.

4. A ceramic pump as claimed in claim 1, wherein The rear cover plate (32) is further provided with a secondary blade (34) on the end face of the side facing the front cover plate (31), the secondary blade (34) is located between two adjacent main blades (33), and the number and arrangement of the secondary blades (34) are the same as those of the main blades (33).

5. A ceramic pump as claimed in claim 2, wherein The sealing box (6) is provided with a sealing groove (61) on the side facing the shield skeleton (52), and a ceramic coating (13) is arranged on the inner wall of the sealing groove (61).

6. A ceramic pump as claimed in claim 5, wherein The ceramic overcurrent part (51) is provided with a plurality of ceramic backbones (53) on the side facing the sealing groove (61), the ceramic backbones (53) extend along the radial direction of the ceramic overcurrent part (51), and a plurality of the ceramic backbones (53) are arranged around the central axis of the ceramic overcurrent part (51).

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