CN115045862A

CN115045862A - Novel slurry pump

Info

Publication number: CN115045862A
Application number: CN202210693801.5A
Authority: CN
Inventors: 刘鹏
Original assignee: BEIJING GOLDEN RAINBOW SILICON NITRIDE CO LTD
Current assignee: BEIJING GOLDEN RAINBOW SILICON NITRIDE CO LTD
Priority date: 2022-06-18
Filing date: 2022-06-18
Publication date: 2022-09-13

Abstract

The invention provides a novel slurry pump, which comprises: the pump body and sheath, the pump body is the cylindricality ring body, place in the sheath in the pump body, and the sheath outer wall closely laminates pump body inner wall, the sheath both sides are provided with the backplate respectively, pump body both sides are provided with the pump cover respectively, the pump cover supports presses the backplate and closely laminates on the sheath. The invention has the advantages that: the problem that the large-scale slurry pump applied with the silicon carbide material is easy to break is solved, the large-scale slurry pump applied with the silicon carbide material is realized, and easily maintained or easily replaced wearing parts are provided.

Description

Novel slurry pump

Technical Field

The invention relates to the technical field of slurry pumps, in particular to a novel slurry pump.

Background

The sediment stuff pump is the pump that is used for carrying the sediment thick liquid, and its pump body adopts inside and outside bilayer structure more, mainly is applied to: the fields of mine, power plant, dredging, metallurgy, chemical industry, building materials, petroleum and other industries.

The seriously worn parts of the slurry pump when pumping solid-liquid mixture are the impeller, the sheath, the guard plate and other flow passage parts, so the slurry pump is also called a worship pump in the industry.

Generally, the flow passage component of the slurry pump is made of metal materials, which cannot effectively meet the requirements on wear resistance and cavitation resistance, and the flow passage component made of metal materials is also easy to corrode in acid and alkaline slurry and has short service life; the flow passage component of the slurry pump is also made of engineering plastic materials, and although the flow passage component has excellent corrosion resistance, the flow passage component is not wear-resistant.

The flow passage component of the slurry pump is made of high-corrosion-resistant special metal materials, and high cost is undoubtedly increased.

Based on the above situation, a silicon carbide material having excellent wear resistance and acid and alkali resistance is applied to flow passage components of slurry pumps, such as a sheath and a guard plate.

The slurry pump is generally assembled by a pump body stud by adopting an inner-outer double-layer structure. These are all parts made by casting (such as sheaths, shields, pump housings). The pump casing is mainly used for fixedly mounting the sheath and the guard plate, and castings cannot meet the requirement of high precision on the inner surface and the outer surface of each casting, so that a large gap exists between the guard plate and the pump casing.

The silicon carbide material is easy to crack due to the weak shock resistance of the silicon carbide material, and the overflowing component manufactured by the traditional double-layer structure moving method is extremely easy to crack due to the fact that a large gap exists between the sheath and the pump shell after installation and during installation stress and high-lift pressure bearing work. Slurry pumps using silicon carbide materials are generally smaller in size and lower in head.

Application publication No. CN110219823A discloses a sediment stuff pump for resisting acid and high temperature environment, includes the pump case the compound adhesive linkage of carborundum is located the ceramic layer with between the metal body. Namely, a silicon carbide composite bonding layer is filled between the inner and outer double-layer structures.

Application publication No. CN114087203A discloses integration sediment stuff pump and mould for its manufacturing, pump case integrated into one piece need not to adopt two pump case concatenations, and sealing performance is good, and the spiral case can follow in the connector department embedding pump case on the pump case, then adopts resin carborundum sand bed to fill the gap between pump case and the spiral case. Namely, a resin silicon carbide sand layer is filled between the inner and outer double-layer structures.

Although the gap problem is solved by the filling mode in the prior art, the method can be applied to a slurry pump with large size and high lift. However, the sheath of the slurry pump belongs to a wearing part, and is frequently repaired or replaced in daily use. The correct assembly and reasonable clearance adjustment are also ensured in the process of maintaining or replacing the quick-wear part of the slurry pump, and the phenomenon of tight friction is avoided; the above-disclosed prior art solution undoubtedly increases the workload of removing the original filling layer and refilling the resin when the sheath is replaced.

Based on the situation, how to overcome the problem that the silicon carbide material is easy to break when being applied to the slurry pump with large size and high lift is the technical problem to be solved by the application, the silicon carbide material is applied to the large-scale slurry pump, and the wearing parts are easy to maintain or replace.

Disclosure of Invention

The embodiment of the application provides a novel slurry pump, solves the problem that silicon carbide materials are easy to break when being applied to large-size and high-lift slurry pumps in the prior art, realizes the large-scale slurry pump to which the silicon carbide materials are applied, and is easy to maintain or replace wearing parts.

The embodiment of the application provides a novel sediment stuff pump, include: the pump body and sheath, the pump body is the cylindricality ring body, place in the sheath in the pump body, and the sheath outer wall closely laminates pump body inner wall, the sheath both sides are provided with the backplate respectively, pump body both sides are provided with the pump cover respectively, the pump cover supports presses the backplate and closely laminates on the sheath.

Preferably, the sheath is an integrally formed cylindrical body provided with a cavity, and the end faces of two sides of the sheath are provided with circular ports for mounting the guard plates;

the annular periphery of the inner wall of the cavity forms an arc shape towards the extension part of the circular port;

a sheath water outlet which extends outwards and penetrates through the sheath is formed in the inner wall of the cavity;

and a pump body water outlet for internally arranging the sheath water outlet is formed in the pump body.

Preferably, the guard plate is of a circular cake-shaped structure, a through hole is formed in the center of the guard plate in an outward extending mode in the axial direction, and an outer edge is formed in the periphery of the outer side of the guard plate in an outward extending mode.

Preferably, the guard plate is tightly arranged in the circular port, the outer edge is pressed against the end face of the periphery of the circular port, and a sealing ring is arranged between the outer edge and the end face of the periphery of the circular port.

Preferably, the guard plate is divided into a front guard plate and a rear guard plate, and an inclined plane protruding inwards is arranged on the inner wall of the front guard plate and is positioned in the through hole.

Preferably, the pump cover is a circular cake-shaped structure, a circular hole extends outwards in the axial direction of the center of the pump cover, and the pump cover around the circular hole protrudes outwards to form a trapezoidal structure.

Preferably, a right-angle notch is formed in an inward concave boundary formed by the end face of the inner side of the pump cover protruding outwards, and the right-angle notch abuts against the outer edge of the guard plate.

Preferably, the end face of the inner side of the pump cover is provided with at least one or more trapezoidal protrusions at the periphery of the inner side of the circular hole, the trapezoidal protrusions are pressed against the end face of the outer side of the guard plate.

Preferably, the end surfaces of the pump body and the sheath are flush, and a plurality of protruding connecting holes which are fixedly connected through pump body studs are arranged on the periphery of the pump body and the pump cover;

the pump cover includes a front pump cover and a rear pump cover.

Preferably, the pump body and the pump cover are made of metal materials, the sheath and the guard plate are made of silicon carbide materials, and the silicon carbide materials are silicon carbide ceramics or silicon nitride combined silicon carbide and the like.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages: by changing the structural shape of the pump body and utilizing the support of the pump body and the pump cover, the problem that the large-scale slurry pump to which the silicon carbide material is applied is easy to break is effectively solved, the large-scale slurry pump to which the silicon carbide material is applied is further realized, and the quick-wear part is easy to maintain or replace.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is an exploded view of a slurry pump according to an embodiment of the present invention;

FIG. 2 is a sectional view of a slurry pump according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a prior art configuration of the present invention;

in the figure, a pump body 1, a sheath 2, a guard plate 3, a pump cover 4, a sealing ring 5, a pump body stud 6 and a bulge connecting hole 7 are arranged;

the pump body water outlet 11, the cavity 21, the circular port 22, the arc 23 and the sheath water outlet 24;

the through hole 31, the outer edge 32, the front guard plate 301, the rear guard plate 302 and the inclined plane 33;

a circular hole 41, a right-angle notch 42, a trapezoidal protrusion 43, a front pump cover 401 and a rear pump cover 402;

a gap 9.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of this application includes through providing a novel sediment stuff pump: the pump comprises a pump body 1 and a sheath 2, wherein the pump body 1 is a cylindrical ring body, the sheath 2 is arranged in the pump body 1, the outer wall of the sheath 2 is tightly attached to the inner wall of the pump body 1, guard plates 3 are arranged on two sides of the sheath 2 respectively, pump covers 4 are arranged on two sides of the pump body 1 respectively, and the pump covers 4 are abutted to the guard plates 3 and tightly attached to the sheath 2. The impact force of flowing slurry to the sheath 2 and the guard plate 3 is shared by the pump body 1 and the pump cover 4 when the slurry pump operates.

Preferably, the sheath 2 is a cylindrical body integrally formed with a cavity 21, and two side end faces thereof are provided with circular ports 22 for mounting the guard plate 3;

the annular periphery of the inner wall of the cavity 21 extends towards the circular port 22 to form an arc 23;

a sheath water outlet 24 which extends outwards and penetrates through the sheath 2 is arranged on the inner wall of the cavity 21;

the pump body 1 is provided with a pump body water outlet 11 for internally arranging the sheath water outlet 24.

Preferably, the guard plate 3 is a circular cake-shaped structure, a through hole 31 is formed in the center of the guard plate in an outward extending manner, and an outer edge 32 is formed in the outer periphery of the guard plate 3 in an outward extending manner.

Preferably, the guard plate 3 is tightly placed in the circular port 22, the outer edge 32 is pressed against the end surface of the periphery of the circular port 22, and a sealing ring 5 is arranged between the outer edge 32 and the end surface of the periphery of the circular port 22.

Preferably, the guard plate 3 is divided into a front guard plate 301 and a rear guard plate 302, and an inclined surface 33 protruding inwards is formed on the inner wall of the front guard plate 301 at the through hole 31.

The through hole 31 on the front guard plate 301 is a slurry inlet, and the arrangement of the inclined surface 33 can effectively limit the backflow of flowing slurry when a slurry pump operates, so as to improve the efficiency of the slurry pump.

Preferably, the pump cover 4 is a circular cake-shaped structure, a circular hole 41 is axially and outwardly extended from the center of the circular cover, and the pump cover 4 around the circular hole 41 protrudes outwardly to form a trapezoidal structure.

Preferably, a right-angle notch 42 is formed in an inward concave boundary formed by the inward convex end surface of the pump cover 4, and the right-angle notch 42 is pressed against the outer edge 32 of the guard plate 3.

Preferably, the end surface of the inner side of the pump cover 4, which is located at the periphery of the inner side of the circular hole 41, is provided with a trapezoidal protrusion 43, the trapezoidal protrusion 43 is pressed against the end surface of the outer side of the guard plate 3, the trapezoidal protrusion 43 is used for sharing the pressure of the stress surface of the guard plate 3, so as to solve the problem that the guard plate 3 is easy to break when the guard plate is too large, the number of the trapezoidal protrusions 43 is at least one or more, and the specific number of the protrusions is set according to the size of the pump body.

Preferably, the end surfaces of the pump body 1 and the sheath 2 are flush, and a plurality of protrusion connecting holes 7 which are fixedly connected through pump body studs 6 are arranged on the periphery of the pump body 1 and the pump cover 4;

the pump cover 4 includes a front pump cover 401 and a rear pump cover 402.

Preferably, the pump body 1 and the pump cover 4 are made of metal materials, the sheath 2 and the guard plate 3 are both made of silicon carbide materials, and the silicon carbide materials are silicon nitride combined with silicon carbide.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A novel slurry pump, comprising: the pump body (1) and sheath (2), the pump body (1) is the cylindricality ring body, place in sheath (2) in the pump body (1), and sheath (2) outer wall closely laminates pump body (1) inner wall, sheath (2) both sides are provided with backplate (3) respectively, pump body (1) both sides are provided with pump cover (4) respectively, pump cover (4) are supported and are pressed backplate (3) and closely laminate on sheath (2).

2. The novel slurry pump according to claim 1, wherein the sheath (2) is an integrally formed cylindrical body provided with a cavity (21), and two side end faces of the sheath are provided with circular ports (22) for mounting the guard plate (3);

the annular periphery of the inner wall of the cavity (21) extends towards the circular port (22) to form an arc (23);

a sheath water outlet (24) which extends outwards and penetrates through the sheath (2) is formed in the inner wall of the cavity (21);

the pump body (1) is provided with a pump body water outlet (11) for internally arranging the sheath water outlet (24).

3. The novel slurry pump as claimed in claim 2, wherein the cover plate (3) is a circular cake-shaped structure, a through hole (31) is formed in the center of the cover plate and extends outwards in the axial direction, and an outer edge (32) is formed in the outer periphery of the cover plate (3) and extends outwards.

4. The novel slurry pump as claimed in claim 3, wherein the guard plate (3) is closely inserted into the circular port (22), the outer edge (32) is pressed against the end surface of the periphery of the circular port (22), and a sealing ring (5) is arranged between the outer edge (32) and the end surface of the periphery of the circular port (22).

5. The novel slurry pump according to claim 3, wherein the guard plate (3) is divided into a front guard plate (301) and a rear guard plate (302), and an inward-convex inclined surface (33) is arranged on the inner wall of the front guard plate (301) and positioned at the through hole (31).

6. The novel slurry pump according to claim 3, wherein the pump cover (4) is a circular cake-shaped structure, a circular hole (41) is formed in the center of the circular cake-shaped structure and extends axially outwards, and the pump cover (4) is protruded outwards around the circular hole (41) to form a trapezoid structure.

7. The novel slurry pump according to claim 6, characterized in that a right-angle notch (42) is formed in the concave boundary formed by the outward protrusion of the end surface of the inner side of the pump cover (4), and the right-angle notch (42) is pressed against the outer edge (32) of the guard plate (3).

8. The novel slurry pump according to claim 6, wherein a trapezoidal protrusion (43) is arranged on the inner side end face of the pump cover (4) and located on the inner side periphery of the circular hole (41), and the trapezoidal protrusion (43) is pressed against the outer end face of the guard plate (3).

9. The novel slurry pump according to claim 1, characterized in that the end surfaces of the pump body (1) and the sheath (2) are flush with each other, and a plurality of protruding connection holes (7) which are fixedly connected through pump body studs (6) are arranged on the periphery of the pump body (1) and the pump cover (4);

the pump cover (4) comprises a front pump cover (401) and a rear pump cover (402).

10. The novel slurry pump according to claim 1, wherein the pump body (1) and the pump cover (4) are made of metal, and the sheath (2) and the protective plate (3) are made of silicon carbide.