A slurry pump

Abstract

The invention discloses a kind of slurry pumps, comprising: pump body and sheath, the pump body is cylindrical ring body, the sheath is built into the pump body, fastener is arranged between the pump body and sheath, the sheath both sides are respectively provided with guard plate, the pump body both sides are respectively provided with pump cover, the pump cover is pressed guard plate and is closely attached on the sheath.The slurry pump disclosed in the invention solves the tediousness of the filling glue method in the prior art, improves the efficiency, reduces the damage of the ceramic sheath caused by uneven stress when installing the sheath into the pump body during installation, and simultaneously protects the sheath from breaking due to erosion, thereby achieving the purpose of prolonging the service life of the vulnerable parts of the slurry pump.

Description

Technical Field

[0001] This invention relates to the field of slurry pump technology, specifically to a slurry pump. Background Technology

[0002] Slurry pumps are used to transport slurry. Their pump bodies often adopt a double-layer structure and are mainly used in industries such as mining, power plants, dredging, metallurgy, chemical industry, building materials, and petroleum.

[0003] When a slurry pump pumps a solid-liquid mixture, the parts that experience severe wear are the impeller, casing, and wear plates, which is why slurry pumps are also known as "worship pumps" in the industry.

[0004] Typically, the flow-through components of slurry pumps are made of metal, which cannot effectively meet the requirements in terms of wear resistance and cavitation resistance. Metal flow-through components are also prone to corrosion in acidic and alkaline slurries, resulting in a short service life. Some slurry pump flow-through components are also made of engineering plastics, which have excellent corrosion resistance, but the materials themselves are not wear-resistant.

[0005] The use of highly corrosion-resistant special metal materials for the flow-through components of slurry pumps undoubtedly increases the cost significantly.

[0006] Based on the above, silicon carbide materials with excellent wear resistance and acid and alkali resistance are used in the flow parts of slurry pumps, such as sleeves and protective plates.

[0007] Slurry pumps typically employ a double-layered structure, assembled using pump body studs. These components (such as the sheath, liner, and pump casing) are all manufactured using casting methods. The pump casing primarily serves to securely mount the sheath and liner. However, the castings cannot meet extremely high precision requirements on their inner and outer surfaces, resulting in significant gaps between the liner and the pump casing.

[0008] Silicon carbide materials are inherently weak in impact resistance and easily break. When used to manufacture flow components using traditional double-layer structures, the large gap between the sheath and the pump casing after installation makes them extremely prone to breakage under stress during installation and high-head pressure operation. Therefore, slurry pumps using silicon carbide materials are generally smaller in size and have lower head.

[0009] Application publication number CN110219823A discloses a slurry pump for resisting acidic and high-temperature environments, including a pump casing and a silicon carbide composite adhesive layer located between the ceramic layer and the metal body. That is, a silicon carbide composite adhesive layer is filled between the inner and outer double-layer structure.

[0010] The applicant's patent application number 2022106938015 discloses a novel slurry pump, comprising: a pump body and a sheath. The pump body is a cylindrical ring, and the sheath is built into the pump body with its outer wall tightly fitted to the inner wall of the pump body. Protective plates are respectively provided on both sides of the sheath, and pump covers are respectively provided on both sides of the pump body. The pump covers press against the protective plates, tightly fitting them to the sheath. This solves the gap problem and allows for application in large-size, high-lift slurry pumps. It achieves the application of silicon carbide materials in large-scale slurry pumps, and facilitates maintenance and replacement of vulnerable parts.

[0011] In practical applications, due to the vibration during the operation of the slurry pump, the sheath and the pump body are prone to axial rotation, resulting in uneven stress in some parts, which can easily lead to cracks and reduce the service life of vulnerable parts. In particular, the rotation of the sheath in the pump body can cause gaps to appear at the connection between the sheath outlet pipe and the sheath.

[0012] Based on the above, how to address the rotation of the sheath within the pump body is the technical problem this application aims to solve. Summary of the Invention

[0013] This application provides a slurry pump that solves the problem of the sheath rotating in the pump body in the prior art, thereby extending the service life of the vulnerable parts of the slurry pump.

[0014] This application provides a slurry pump, including: a pump body and a sheath, the pump body being a cylindrical ring, the sheath being built into the pump body, fasteners being provided between the pump body and the sheath, protective plates being provided on both sides of the sheath, and pump covers being provided on both sides of the pump body, the pump covers pressing against the protective plates and tightly fitting against the sheath.

[0015] Preferably, the inner wall of the pump body extends axially from both sides of the center line to the edge to form an inverted conical surface, the cross-section of the pump body is trapezoidal, and the angle between the inverted conical surface and the axial line is 2-10 degrees.

[0016] Preferably, the fastener is a wedge-shaped ring, used to be inserted between the outer wall of the sheath and the inverted conical surface;

[0017] The outer wall of the sheath fits tightly against the middle part of the inner wall of the pump body.

[0018] Preferably, limiting grooves are evenly distributed on the inverted conical surface.

[0019] Preferably, the outer surface of the fastener is provided with a protrusion that matches the limiting groove.

[0020] Preferably, the sheath is an integrally formed cylindrical body with a cavity, and the inner wall of the cavity is provided with a sheath outlet pipe that extends outward and penetrates the sheath.

[0021] The pump body is provided with a pump body outlet pipe for housing the sheath outlet pipe.

[0022] Preferably, the pump body outlet pipe includes a C-type pump body outlet pipe fixedly mounted on the pump body and a pump fitting fixed by bolts.

[0023] Preferably, the protective plate is divided into a front protective plate and a rear protective plate; the pump cover includes a front pump cover and a rear pump cover.

[0024] Preferably, the pump cover is fixed to the pump body by pump body studs, which are used to press and fix the protective plate to the protective sleeve.

[0025] Preferably, the pump body and pump cover are made of metal, the sleeve and protective plate are made of silicon carbide, and the fasteners are made of silicone or nylon.

[0026] Preferably, the pump body and pump cover are made of metal, and the sleeve and protective plate are both made of silicon carbide. The silicon carbide material is any one of silicon carbide ceramic, silicon nitride-bonded silicon carbide, recrystallized silicon carbide, or other bonded forms of silicon carbide material.

[0027] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0028] 1. By installing a fastener between the pump body and the sheath, the cumbersome method of filling the adhesive is solved. First, it avoids the trouble of cleaning the adhesive. Second, it avoids uneven stress caused by air bubbles or impurities after secondary application due to incomplete cleaning of the adhesive. Third, it avoids waiting for the adhesive to cure, thus improving efficiency.

[0029] 2. By installing a fastener between the pump body and the sheath, damage to the ceramic sheath caused by uneven stress during installation into the pump body is reduced;

[0030] 3. By installing a fastener between the pump body and the jacket, not only are the problems associated with the rubber filling method solved, but the high-precision machining requirement is also avoided if rubber filling is not used, thereby reducing the machining difficulty and cost. At the same time, it effectively overcomes the phenomenon of uneven stress at the outlet caused by the slight axial displacement of the jacket in the pump body due to the slurry scouring, and protects the jacket from breakage caused by scouring, thereby extending the service life of the slurry pump's vulnerable parts. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a partial exploded view of the slurry pump according to an embodiment of the present invention;

[0033] Figure 2 This is an exploded view of the overall structure of the slurry pump according to an embodiment of the present invention;

[0034] In the diagram, pump body 1, sheath 2, fastener 3, guard plate 4, pump cover 5, pump body stud 6;

[0035] 11. Inverted conical surface; 12. Limiting groove; 13. Pump body outlet pipe; 131. C-type pump body outlet pipe; 132. Pump fittings;

[0036] Cavity 21, sheathed water outlet pipe 22;

[0037] 31 protrusions;

[0038] Front guard plate 41, rear guard plate 42, front pump cover 51, rear pump cover 52. Detailed Implementation

[0039] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] This application provides a slurry pump, including: a pump body 1 and a sheath 2. The pump body 1 is a cylindrical ring, and the sheath 2 is built into the pump body 1. Fasteners 3 are provided between the pump body 1 and the sheath 2. Protective plates 4 are provided on both sides of the sheath 2. Pump covers 5 are provided on both sides of the pump body 1. The pump covers 5 press against the protective plates 4 and fit tightly against the sheath 2.

[0043] Preferably, the inner wall of the pump body 1 extends axially from both sides of the center line to the edge to form an inverted conical surface 11, the cross-section of the pump body 1 is trapezoidal, and the angle between the inverted conical surface 11 and the axial line is 2-10 degrees.

[0044] Preferably, the fastener 3 is a wedge-shaped ring, which is used to plug between the outer wall of the sheath 2 and the inverted conical surface 11 to play a shock-absorbing role;

[0045] The outer wall of the sheath 2 is tightly fitted to the middle part of the inner wall of the pump body 1, and the middle part of the inner wall of the pump body 1 provides support for the sheath 2.

[0046] Preferably, limiting grooves 12 are evenly distributed on the inverted conical surface 11.

[0047] Preferably, the outer surface of the fastener 3 is provided with a protrusion 31 that matches the limiting groove 12. The protrusion 31 is axially inserted into the limiting groove 12, and the limiting groove 12 plays a limiting role, thereby limiting the relative position of the fastener 3 and the pump body 1. The fastener 3 is a wedge-shaped ring. With the vibration of the slurry pump during operation, the radial force generated by it will make the fastener 3 and the sheath 2 become tighter and tighter.

[0048] Preferably, the inner wall of the fastener 3 and the outer wall of the sheath 2 are respectively provided with matching protrusions and limiting grooves.

[0049] Preferably, the sheath 2 is an integrally formed cylindrical body with a cavity 21, and the inner wall of the cavity 21 is provided with a sheath outlet pipe 22 that extends outward and penetrates the sheath 2.

[0050] The pump body 1 is provided with a pump body outlet pipe 13 for housing the sheath outlet pipe 22.

[0051] Preferably, the pump body outlet pipe 13 includes a C-shaped pump body outlet pipe 131 fixedly disposed on the pump body 1 and a pump fitting 132 fixed by bolts.

[0052] Preferably, the guard plate 4 is divided into a front guard plate 41 and a rear guard plate 42; the pump cover 5 includes a front pump cover 51 and a rear pump cover 52.

[0053] Preferably, the pump cover 5 is fixed to the pump body 1 by the pump body stud 6, which is used to press and fix the protective plate 4 to the protective sleeve 2.

[0054] Preferably, the pump body 1 and pump cover 5 are made of metal, the sleeve 2 and the protective plate 4 are both made of silicon carbide, and the fastener 3 is made of silicone or nylon.

[0055] Preferably, the pump body and pump cover are made of metal, and the sleeve and protective plate are both made of silicon carbide. The silicon carbide material is any one of silicon carbide ceramic, silicon nitride-bonded silicon carbide, recrystallized silicon carbide, or other bonded forms of silicon carbide material.

[0056] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0057] 1. By installing a fastener between the pump body and the sheath, the cumbersome method of filling the adhesive is solved. First, it avoids the trouble of cleaning the adhesive. Second, it avoids uneven stress caused by air bubbles or impurities after secondary application due to incomplete cleaning of the adhesive. Third, it avoids waiting for the adhesive to cure, thus improving efficiency.

[0058] 2. By installing a fastener between the pump body and the sheath, damage to the ceramic sheath caused by uneven stress during installation into the pump body is reduced;

[0059] 3. By installing a fastener between the pump body and the jacket, not only are the problems associated with the rubber filling method solved, but the high-precision machining requirement is also avoided if rubber filling is not used, thereby reducing the machining difficulty and cost. At the same time, it effectively overcomes the phenomenon of uneven stress at the outlet caused by the slight axial displacement of the jacket in the pump body due to the slurry scouring, and protects the jacket from breakage caused by scouring, thereby extending the service life of the slurry pump's vulnerable parts.

[0060] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0061] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A slurry pump, characterized in that, include: Pump body (1) and sheath (2), wherein the pump body (1) is a cylindrical ring, the sheath (2) is built into the pump body (1), fasteners (3) are provided between the pump body (1) and the sheath (2), protective plates (4) are provided on both sides of the sheath (2), and pump covers (5) are provided on both sides of the pump body (1), the pump covers (5) press against the protective plates (4) and fit tightly against the sheath (2); The inner wall of the pump body (1) extends axially from both sides of the center line to the edge to form an inverted conical surface (11). The fastener (3) is a wedge-shaped ring, used to plug between the outer wall of the sheath (2) and the inverted conical surface (11); The outer wall of the sheath (2) is tightly fitted to the middle part of the inner wall of the pump body (1); The inverted conical surface (11) is provided with evenly distributed limiting grooves (12); The fastener (3) has a protrusion (31) on its outer surface that is adapted to the limiting groove (12).

2. A slurry pump according to claim 1, characterized in that, The sheath (2) is specifically an integrally formed cylindrical body with a cavity (21), and the inner wall of the cavity (21) is provided with a sheath outlet pipe (22) that extends outward and penetrates the sheath (2). The pump body (1) is provided with a pump body outlet pipe (13) for housing the sheath outlet pipe (22).

3. A slurry pump according to claim 2, characterized in that, The pump body outlet pipe (13) includes a C-type pump body outlet pipe (131) fixed on the pump body (1) and a pump fitting (132) fixed by bolts.

4. A slurry pump according to claim 1, characterized in that, The guard plate (4) is divided into a front guard plate (41) and a rear guard plate (42); the pump cover (5) includes a front pump cover (51) and a rear pump cover (52).

5. A slurry pump according to claim 4, characterized in that, The pump cover (5) is fixed to the pump body (1) by the pump body stud (6) and is used to press and fix the guard plate (4) to the sleeve (2).

6. A slurry pump according to claim 1, characterized in that, The pump body (1) and pump cover (5) are made of metal, the sleeve (2) and the protective plate (4) are both made of silicon carbide, and the fastener (3) is made of silicone or nylon.

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