Wear-resistant ceramic and rubber composite metal slurry pump overflowing part

Abstract

The utility model discloses a wear-resistant ceramic and rubber composite metal slurry pump overflowing part, which comprises a front protective plate, a rear protective plate, a front sheath, a rear sheath and an impeller, and rubber layers are filled on the surfaces of a wear-resistant ceramic block and a metal framework and / or between the wear-resistant ceramic block and the metal framework; and the wear-resistant ceramic block is adhered to the metal framework of the easy-to-wear area of the overflowing piece through rubber and / or an adhesive.

Description

[0001] The present application is a divisional application of the Chinese Utility Model Patent Application No. 202420585382.8, filed on March 25, 2024, entitled "Wear-resistant ceramic and rubber composite metal slurry pump", the priority date of which is March 25, 2024. TECHNICAL FIELD

[0002] The utility model belongs to the technical field of centrifugal slurry pump and wear-resistant ceramic for mineral separation, and relates to a wear-resistant ceramic and rubber composite metal slurry pump flow passage. BACKGROUND

[0003] The flow passage material of the existing full-ceramic slurry pump only includes a pure ceramic layer. The integrated design of the pure ceramic flow passage may increase the complexity in the assembly process, especially when it needs to be combined with other metal parts of the pump. It may be more difficult to ensure accurate alignment. When the pump needs to be maintained or the flow passage needs to be replaced, the pure ceramic structure may require the replacement of the entire module instead of replacing or repairing a locally damaged part, which may increase the maintenance cost and time. The pure ceramic flow passage may limit the design flexibility. For example, in the case of optimizing the flow channel shape or size to improve the pump efficiency, the difficulty in processing ceramic may limit the adjustment of these structural details. The pure ceramic structure may fix the specific flow channel shape and size at the initial design stage, which may limit the ability to adjust or optimize the pump performance later, especially when the pump needs to adapt to different working conditions. In addition, the pure ceramic flow passage may have limitations in size and shape because it needs to maintain sufficient structural strength and stability as a whole, which may limit the pursuit of flow channel optimization in the design. SUMMARY

[0004] In order to solve the problems existing in the prior art, the utility model aims to provide a wear-resistant ceramic and rubber composite metal slurry pump for mineral separation and a forming process. By dividing the ceramic material into blocks and bonding it on the metal framework, the problem of difficulty in large-scale production of silicon carbide material for slurry pump flow passage and easy fragmentation under high-speed working conditions is solved, thereby improving the service life of the slurry pump.

[0005] To achieve the above technical purposes, the utility model adopts the following technical solutions:

[0006] The utility model provides a kind of large-scale wear-resistant ceramic and rubber composite metal slag pump for mineral separation, the slag pump includes bracket, bearing assembly, packing box, pump shell, flow part;The flow part includes front guard plate, rear guard plate, front bushing, rear bushing and impeller, the front guard plate, rear guard plate, front bushing, rear bushing and impeller etc.

[0007] Specifically, the wear-resistant ceramic can be directly bonded to the metal framework of the wear-prone area by an adhesive, and then wrapped with vulcanized rubber on the outside of the wear-resistant ceramic and metal framework;It can also be directly formed on the surface of the wear-resistant ceramic and metal framework and between the wear-resistant ceramic and metal framework using a vulcanization injection process, which plays a bonding and buffering role.

[0008] The bracket is the basic support structure of the slag pump, used to fix and carry the bearing assembly, pump shaft and other important components, to ensure the stability and balance of the slag pump during operation;

[0009] The bearing assembly is installed on the bracket, including axial bearing and radial bearing, used to support and guide the rotation of pump shaft, while bearing axial force and radial force transmitted by the impeller;

[0010] The packing box is located at one end or both ends of the pump shaft, with built-in packing seal and / or other forms of shaft seal device, used to prevent the slurry in the slag pump from leaking axially, to maintain the working efficiency of the slag pump and prevent environmental pollution;

[0011] The pump shell is the main structure of the slag pump, usually composed of two halves, or composed of front and back halves, connected by bolts, with components including flow part and / or other wear-resistant bushings inside, connected with the bracket to form a complete slurry delivery channel;

[0012] In the flow part,

[0013] The front guard plate is installed in front of the impeller, cooperated with the inner wall of the pump shell and the bushing, to form a transition flow channel for slurry entering in front of the impeller, to reduce the direct impact and wear of slurry on the inlet of the impeller;

[0014] The rear guard plate is installed behind the impeller, cooperated with the inner wall of the pump shell and the bushing, to form a transition channel for slurry flowing out of the impeller to the outlet section of the pump shell, so that the slurry flowing out of the impeller can smoothly transition to the outlet section of the pump shell, playing a wear-preventing and shock-absorbing role;

[0015] The front sheath and the rear sheath are combined to form the complete sheath of the slurry pump, the sheath is close to the inner wall of the pump shell, a spiral flow channel for slurry is formed, energy generated by the impeller is converted into static pressure energy of the slurry, the sheath has high wear resistance and protects the pump shell from wear;

[0016] The impeller is installed on the pump shaft and is driven to rotate by the motor, slurry is pressurized and transported, the impeller, the front sheath and the rear sheath form a continuous slurry flow channel;

[0017] The components of the slurry pump are nested and connected with each other, and a high-efficiency and wear-resistant slurry conveying system is constructed, wherein the pump shaft penetrates through the whole pump body, power of the motor is transmitted to the impeller through the bearing assembly, the impeller works in the flow channel formed by the sheath, and the sheath protects and guides the slurry flow, so that the slurry pump can maintain good performance and long service life under long-term high-strength operation conditions.

[0018] The radial dimension of the wear-resistant ceramic block is not more than 350mm, the outer diameter width is not more than 350mm, the thickness ranges from 15mm to 35mm, the easily-worn area refers to an area near a flow passage component with fluid linear velocity greater than 20m / s and / or an area generating backflow;

[0019] The gaps between the ceramic blocks and / or between the ceramic blocks and the metal framework are filled with vulcanized rubber;

[0020] The material of the metal framework includes high-chromium alloy, Q235B carbon structural steel or QT500-7 ductile cast iron;

[0021] Specifically, the pump shell in the utility model can adopt QT500-7 ductile cast iron material, and the metal framework in the flow passage component can adopt Q235B carbon structural steel or QT500-7 ductile cast iron material.

[0022] The front and / or rear apron each comprises an apron rubber layer, an apron ceramic layer and an apron metal framework; the apron ceramic layer and the apron rubber layer are compounded on the surface of the apron metal framework; the apron metal framework comprises a one-piece hollow metal cylinder, a planar metal ring fixed at one end of the hollow metal cylinder, the inner circle of the planar metal ring matches the inner diameter of the hollow metal cylinder; the lower surface of the apron metal framework is provided with an annular groove, and the apron ceramic layer is arranged in the annular groove; the inner surface of the hollow metal cylinder and the lower surface of the apron metal framework obtain the apron rubber layer through a vulcanization injection molding process, and / or the apron rubber layer between the wear-resistant ceramic block and the apron metal framework is obtained through a vulcanization injection molding process; the thickness of the apron rubber layer is 0-20mm; when the thickness of the apron rubber layer is 0mm, the apron ceramic layer is exposed outside the apron rubber layer and is not covered by the apron rubber layer;

[0023] The apron ceramic layer is divided into at least one circle along the radial direction according to the size of the apron diameter, and each circle is divided into one or more apron ceramic blocks; the radial size of the apron ceramic block is not more than 350mm, and the outer diameter width is not more than 350mm; the thickness range is 15-35mm; each apron ceramic block is in the shape of a fan, and the apron ceramic blocks in each circle are staggered; the bottom of the apron ceramic block is provided with a dovetail groove and / or a glue passing hole, and a plurality of grooves are arranged around the four edges; the number of the dovetail groove is 2-3, and the width range is 12-30mm; the diameter of the glue passing hole is 10-20mm, and the number is 9-16; the number of the groove is 8-12, and the width is 10-30mm; when the rubber is vulcanized, the dovetail groove and the groove are filled with rubber material, which plays a role of bonding and buffering between the ceramic blocks; the cross section of the groove is rectangular, circular or other shape;

[0024] The structure of the dovetail groove and the glue passing hole is selected from one or a combination of both.

[0025] When the apron ceramic layer is one circle, first limiting blocks are arranged at equal intervals on the outer periphery of the apron ceramic block to prevent the apron ceramic block from moving outward during vulcanization of the rubber; the first limiting blocks and the apron metal framework are fixed by welding;

[0026] When the apron ceramic layer is more than one circle, the apron ceramic blocks in the adjacent two circles are staggered, the apron ceramic blocks in the outer circle are aligned with the outer edge of the apron, and the limiting is relied on the mold during vulcanization of the rubber, without setting limiting blocks.

[0027] The front and rear sheaths each comprise a sheath rubber layer, a sheath ceramic layer and a sheath metal framework;

[0028] The sheath ceramic layer is divided into one or more sheath ceramic blocks along the sheath circumferential direction; the sheath ceramic blocks are fixed on the sheath metal framework by the adhesive; the sheath ceramic layer is provided with second limiting blocks on both sides of the sheath metal framework, the second limiting blocks are welded on the sheath metal framework, and the gap between the edges of the sheath ceramic blocks is 3-5 mm;

[0029] The main body structure of the front sheath and the rear sheath is rubber material;

[0030] Specifically, according to the wear condition of the slurry pump, the sheath ceramic blocks are selectively embedded in the wear position of the sheath, such as the tongue area and different cross-section positions, the sheath ceramic blocks are fixed on the sheath metal framework by the adhesive, the second limiting blocks are arranged at the edges of the sheath ceramic blocks to prevent circumferential displacement, and the sheath ceramic blocks are further embedded into the sheath rubber layer;

[0031] The curved surface shape of the sheath ceramic block is consistent with the flow surface of the sheath, and the circumferential and radial dimensions are not more than 350 mm; and the thickness is not more than 35 mm;

[0032] The top contact edge and the bottom contact edge of the sheath ceramic block are provided with an inclined angle, the inclined angle ranges from 0 to 15°, the contact between the sheath ceramic block and the mold is surface contact when the sheath ceramic block is subjected to vulcanization pressure, and the sheath ceramic block is prevented from being crushed due to local stress;

[0033] The sheath ceramic block is about 0-15 mm away from the rubber flow surface, and about 20-30 mm away from the front and rear sheath contact sealing surface, so that the sheath ceramic layer is prevented from being crushed when the sheath rubber layer is installed;

[0034] The impeller comprises an impeller ceramic block, an impeller metal framework and an impeller rubber layer; the impeller ceramic block is embedded in an easily-worn area of the impeller; the easily-worn area appears in an area with high online speed (for example, >20 m / s) and backflow, and solid particles are easy to accumulate to cause wear, such as the inlet circumferential surface of the impeller, the inner circumferential surface of the front cover plate, the inner circumferential surface of the rear cover plate, the outer circumferential surface of the rear cover plate and the working surface of the blade; the impeller ceramic block comprises an impeller inlet circumferential ceramic block, a front cover plate inner circumferential ceramic block, a rear cover plate inner circumferential ceramic block, a rear cover plate outer circumferential ceramic block and a blade working surface ceramic block; the impeller ceramic block is pre-fixed on the impeller metal framework by an adhesive, and is jointly placed in a mold to be vulcanized and formed by injection of rubber;

[0035] The number of the impeller inlet circumferential ceramic blocks divided along the inlet circumferential direction is consistent with the number of the impeller blades; the front cover plate inner circumferential ceramic block, the rear cover plate inner circumferential ceramic block and the blade working surface ceramic block can be divided into a plurality of small ceramic blocks or a whole ceramic block according to the size of the impeller diameter and the wear area; the rear cover plate outer circumferential ceramic block is distributed in a fan shape along the impeller outer diameter direction and is evenly divided into one or more;

[0036] The rubber layer covering the surface of the impeller ceramic block has a thickness of 0-15mm; when the thickness of the rubber layer covering the surface of the impeller ceramic block is 0mm, the impeller ceramic block is exposed outside the rubber layer and is not covered by the rubber layer.

[0037] In the utility model, different ceramic blocks can be selected according to actual needs, and the same component can also be selected.

[0038] In one specific embodiment, the impeller comprises a front cover plate, a rear cover plate and a plurality of blades, the front cover plate and the rear cover plate are oppositely arranged, a plurality of the blades are arranged between the front cover plate and the rear cover plate, and the front cover plate and the rear cover plate are connected through a plurality of the blades; in the impeller, the shape of each blade is arc-shaped.

[0039] In the specific implementation process, the ceramic blocks needed to be bonded on the guard plate, the sheath and the impeller can be provided with grooves of appropriate size and depth on the metal framework, and the ceramic blocks are bonded and fixed in the grooves.

[0040] In the specific implementation process, a plurality of the grooves are arranged on the inner side of the front cover plate opposite to the rear cover plate and are arranged at intervals along the circumferential direction of the inner side of the front cover plate; and / or,

[0041] A plurality of the grooves are arranged on the inner side of the rear cover plate opposite to the front cover plate and are arranged at intervals along the circumferential direction of the inner side of the rear cover plate; and / or,

[0042] A plurality of the grooves are arranged on the inner surface of the impeller suction inlet; and / or,

[0043] A plurality of the grooves are arranged on the working surface of each blade.

[0044] Each of the wear-resistant ceramic blocks is fixedly connected with the impeller body through an adhesive.

[0045] In one specific embodiment, the rubber for buffering and bonding can be filled between the metal framework and the ceramic blocks in addition to covering the surface of the metal framework and the ceramic blocks.

[0046] The beneficiation large-sized wear-resistant ceramic and rubber composite metal slurry pump has the advantages that the ceramic wear-resistant and corrosion-resistant properties are exerted, the problem of large-sized and high brittleness caused by the use of only silicon carbide ceramic is solved by the scheme of bonding the ceramic according to the wear area, and the phenomenon of fragmentation of the silicon carbide material caused by the impact of large particles on the flow passage of the slurry pump under high-speed working conditions is solved through the structure of the ceramic composite rubber; the elasticity of the rubber material can buffer and reduce the impact of large particles on the flow passage, and the wear resistance and service life of the slurry pump are improved.

[0047] The ceramic and rubber composite metal slurry pump is low in maintenance cost and is especially suitable for conveying solid particles and corrosive medium in ore dressing, metallurgy and chemical industry. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0049] Figure 1 is a structure schematic diagram of the wear-resistant ceramic and rubber composite metal slurry pump for ore dressing of the present application.

[0050] Figure 2 is a structure three-dimensional view of the wear-resistant ceramic and rubber composite metal slurry pump for ore dressing of the present application.

[0051] Figure 3 is a structure sectional view of the front guard plate of the ceramic and rubber composite metal of the present application.

[0052] Figure 4 is a structure schematic diagram of the front guard plate ceramic block bonding metal framework of the present application.

[0053] Figure 5 is a structure schematic diagram of the front guard plate ceramic block of the present application.

[0054] Figure 6 is another structure schematic diagram of the front guard plate ceramic block of the present application.

[0055] Figure 7 is a structure schematic diagram of the front sheath of the ceramic and rubber composite metal of the present application.

[0056] Figure 8 is a structure sectional view of the front sheath of the ceramic and rubber composite metal of the present application.

[0057] Figure 9 is a structure schematic diagram of the sheath ceramic block bonding metal framework of the present application.

[0058] Figure 10 is a structure schematic diagram of the sheath ceramic block of the present application.

[0059] Figure 11 is a three-dimensional view of the impeller of the ceramic and rubber composite metal of the present application.

[0060] Figure 12 is a ceramic and rubber composite metal impeller structure schematic view of the utility model.

[0061] Figure 13 is a ceramic and rubber composite metal impeller structure sectional view of the utility model.

[0062] Figure 14 is a ceramic and rubber composite metal impeller ceramic block adhesion metal framework view of the utility model.

[0063] Figure 15 is a ceramic and rubber composite metal impeller ceramic block adhesion metal framework view of the utility model. DETAILED DESCRIPTION

[0064] The utility model will be further explained in combination with the following specific embodiments and drawings. The process, condition, experimental method and the like for implementing the utility model are the general knowledge and common sense of the art except for the following specifically mentioned contents, and the utility model has no special limitation.

[0065] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" 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.

[0066] In the description of the present application, it should be noted that, unless otherwise specifically specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0067] In the present application, unless specifically stated and limited otherwise, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0068] In the present application, the term "comprising" is an open-ended expression, that is, it includes the contents indicated by the present utility model, but does not exclude other aspects.

[0069] In the present application, the term "about" when applied to a value indicates that some slight inaccuracy is allowed in the calculation or measurement (approximate or reasonably close to the value; nearly).

[0070] In the present application, the term "and / or" includes any one and all combinations of the relevant listed items.

[0071] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. For the purpose of simplifying the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0072] The large-scale wear-resistant ceramic and rubber composite metal slag slurry pump for mineral separation and the forming process of the present utility model are further described below in combination with the drawings:

[0073] Figures 1-15In the middle, 1, bracket; 2, bearing assembly; 3, stuffing box; 4, pump shell; 5, front guard; 6, rear guard; 7, front sleeve; 8, rear sleeve; 9, impeller; 10, guard rubber layer; 10a, guard ceramic block; 11, guard ceramic layer; 12, guard metal framework; 13, first limiting block; 13a, second limiting block; 14, dovetail groove; 14a, glue hole; 15, groove; 16, sleeve rubber layer; 17a, sleeve ceramic block; 17, sleeve ceramic layer; 18, sleeve metal framework; 19, impeller ceramic block; 19a, impeller inlet circumferential ceramic block; 19b, front cover plate inner side circumferential ceramic block; 19c, rear cover plate inner side circumferential ceramic block; 19d, rear cover plate outer side circumferential ceramic block; 19e, blade working surface ceramic block; 20, impeller metal framework; 21, impeller rubber layer.

[0074] The utility model provides a large -scale wear -resisting ceramic and rubber composite metal slag pump for mineral separation, the slag pump includes bracket 1, bearing assembly 2, stuffing box 3, pump shell 4, front guard 5, rear guard 6, front sleeve 7, rear sleeve 8 and impeller 9. The front guard 5, rear guard 6, front sleeve 7, rear sleeve 8 and the composite structure of ceramic and rubber composite metal are used to the flow member such as impeller 9.

[0075] Further, the front guard 5 and / or the rear guard 6, all include guard rubber layer 10, guard ceramic layer 11 and guard metal framework 12, the guard ceramic layer 11 and the guard rubber layer 10 are compounded on the surface of the guard metal framework 12, the thickness of the guard rubber layer 10 covered on the surface of the guard ceramic layer 11 is 0-20mm,

[0076] The guard ceramic layer 11 is divided into 1-2 circles along the radial direction according to the diameter of the guard and the ceramic forming process, each circle is divided into one or more fan-shaped guard ceramic blocks 10a, and is placed on the surface of the guard metal framework 12 along the circumferential direction,

[0077] When the guard ceramic layer 11 is 1 circle, the first limiting block 13 is arranged at equidistant intervals on the outer periphery of the guard ceramic block 10a, so as to prevent the guard ceramic block 10a from moving outward during vulcanization of rubber, and the first limiting block 13 and the guard metal framework 12 are fixed by welding,

[0078] The guard ceramic block 10a is in the shape of a fan, the guard ceramic blocks 10a in adjacent two circles are staggered, the dovetail groove 14 and / or the glue hole 14a are arranged on the bottom surface of the guard ceramic block 10a, and a plurality of grooves 15 are arranged around the four edges, the dovetail groove 14 and / or the glue hole 14a and the grooves 15 are filled with rubber material during vulcanization of rubber, and the guard ceramic blocks 10a play a bonding and buffering role, and the cross section of the groove 15 is in the shape of a rectangle, a circle or other shapes,

[0079] The groove 15 is for passing rubber through the groove during vulcanization process, and finally forming a rubber layer outside the ceramic layer.

[0080] Further, the front sheath 7 and the rear sheath 8 each comprise a sheath rubber layer 16, a sheath ceramic layer 17 and a sheath metal framework 18.

[0081] The sheath ceramic layer 17 is divided into one or more sheath ceramic blocks 17a along the sheath circumferential direction; according to the wear condition of the slurry pump, the sheath ceramic blocks 17a can be selectively embedded in the wear position of the sheath, such as the lip region and different cross-section positions, and the sheath ceramic blocks 17a are fixed on the sheath metal framework 18 by an adhesive, and the sheath metal framework 18 is attached to the side wall of the sheath rubber layer 16; the edge of the sheath ceramic block 17a is provided with a second limiting block 13a to prevent the sheath ceramic block 17a from being circumferentially displaced and further embedded into the sheath rubber layer 16;

[0082] The top of the sheath ceramic block 17a is provided with an inclined angle treatment to ensure that the sheath ceramic block 17a is in surface contact with the mold when it is subjected to vulcanization pressure, preventing local stress from crushing the ceramic;

[0083] The sheath ceramic block 17a is about 0-15mm away from the flow surface; and about 20-30mm away from the front and rear sheath contact sealing surface, preventing the sheath ceramic layer 17 from being crushed when the sheath rubber layer 16 is installed;

[0084] Further, the impeller 9 comprises an impeller ceramic block 19, an impeller metal framework 20 and an impeller rubber layer 21.

[0085] The impeller ceramic block 19 is embedded in the easily-worn area of the impeller 9, including the impeller inlet circumference, the inner side circumference of the front cover plate, the inner side circumference of the rear cover plate, the outer side circumference of the rear cover plate and the blade working surface; the impeller ceramic block 19 is pre-fixed on the impeller metal framework 20 by an adhesive, and is placed in a mold together to be vulcanized by injection of rubber;

[0086] The impeller inlet circumference ceramic block 19a is divided into one or more blocks along the inlet circumference direction, and the number is consistent with the number of impeller blades; the front cover plate inner side circumference ceramic block 19b, the rear cover plate inner side circumference ceramic block 19c and the blade working surface ceramic block 19e can be divided into multiple blocks or a whole block according to the size of the impeller diameter and the wear area; the rear cover plate outer side circumference ceramic block 19d is distributed in a fan shape along the impeller outer diameter direction and is evenly divided into one or more blocks;

[0087] The thickness of the rubber covering the surface of the impeller ceramic block 19 is 0-15mm;

[0088] Furthermore, the ceramic block is first cleaned with toluene, a curing agent is first applied to the surface, and then a layer of rubber adhesive is applied. After being left for 2-3 hours, the ceramic block is placed in a mold after being bonded to the metal frame to improve the initial bonding strength and positioning, and then a rubber vulcanization process is performed.

[0089] Furthermore, the present invention uses wear-resistant ceramic materials. The guard plate ceramic layer 11, the sheath ceramic layer 17 and the impeller ceramic block 19 in the present invention can be made of silicon carbide ceramic, silicon nitride ceramic or recrystallized ceramic, either alone or in combination to form a wear-resistant ceramic layer.

[0090] Furthermore, the pump housing is assembled with the flow-through parts and the bearing assembly and installed on the bracket. The pump housing is made of QT500-7 material; the metal frame is made of QT500-7 or Q235B material.

[0091] Example 1

[0092] like Figure 1 、 2 As shown, in this embodiment, a large-scale wear-resistant ceramic and rubber composite metal slurry pump for mineral processing includes a bracket 1, a bearing assembly 2, a stuffing box 3, a pump casing 4, a front guard plate 5, a rear guard plate 6, a front sleeve 7, a rear sleeve 8 and an impeller 9.

[0093] like Figure 3 As shown, the front guard plate 5 includes a guard plate rubber layer 10, a guard plate ceramic layer 11 and a guard plate metal frame 12; the guard plate rubber layer 10 covered on the surface of the guard plate ceramic layer 10 has a thickness of 10 mm;

[0094] like Figure 4 As shown, in this embodiment, the guard plate ceramic layer 10 is divided into a circle along the radial direction, and each circle is divided into 8 sector-shaped guard plate ceramic blocks 10a, which are placed on the surface of the guard plate metal frame 12 along the circumferential direction; first limit blocks 13 are arranged at equal intervals on the periphery of the guard plate ceramic blocks 10a to prevent the guard plate ceramic blocks 10a from shifting in the outer diameter direction when the rubber is vulcanized; the first limit blocks 13 are fixed to the guard plate metal frame 12 by welding;

[0095] The guard plate ceramic block 10a is fan-shaped, as shown in FIG. Figure 5 As shown, a dovetail groove 14 is provided on the bottom surface, and a plurality of grooves 15 are provided around the four sides. When the rubber is vulcanized, the dovetail groove 14 and the groove 15 are filled with rubber material, which plays a bonding and buffering role between the guard plate ceramic blocks 10a; the cross-section of the groove 15 is circular.

[0096] like Figure 7 and Figure 8As shown, the front sheath 7 includes sheath rubber layer 16, sheath ceramic layer 17 and sheath metal skeleton 18; in this embodiment, according to the wear condition of the slurry pump, the sheath ceramic layer 17 is divided into two sheath ceramic blocks 17a along the circumferential direction of the sheath rubber layer in the area of the baffle of the sheath rubber layer; as shown Figure 9 As shown, the sheath ceramic blocks 17a are fixed on the sheath metal skeleton 18 by adhesive, the edges of the sheath ceramic blocks 17a are provided with second limiting blocks 13a to prevent circumferential displacement, and then embedded into the sheath rubber layer;

[0097] As shown Figure 10 As shown, the top contact edge and the bottom contact edge of the sheath ceramic block 17a are provided with an inclined angle of 10° to ensure that the sheath ceramic block is in surface contact with the mold when it is subjected to vulcanization pressure, preventing local stress from crushing the ceramic;

[0098] The sheath ceramic block 17a is about 8mm away from the rubber overflow surface and about 20mm away from the front and rear sheath contact sealing surface, preventing the sheath ceramic layer 17 from being crushed during the installation of the sheath rubber layer;

[0099] As shown Figure 11 And Figure 12 As shown, the impeller 9 includes impeller ceramic block 19, impeller metal skeleton 20 and impeller rubber layer 21; the impeller ceramic block 19 is embedded in the easily-worn area of the impeller, including: impeller inlet circumference, front cover plate inner circumference, rear cover plate inner circumference, rear cover plate outer circumference, blade working surface, the impeller ceramic block 19 is pre-fixed on the impeller metal skeleton 20 with adhesive, and then put into the mold for vulcanization molding by injecting rubber;

[0100] As shown Figures 13-15 As shown, the impeller inlet circumference ceramic block 19a is evenly divided into five blocks along the inlet circumference direction, the number of which is consistent with the number of impeller blades; the front cover plate inner circumference ceramic block 19b, the rear cover plate inner circumference ceramic block 19c and the blade working surface ceramic block 19e can be divided into multiple blocks according to the size of the impeller diameter and the wear area to prevent the ceramic from being crushed by stress; the rear cover plate outer circumference ceramic block 19d is distributed in a fan shape along the impeller outer diameter direction and is evenly divided into 15; the thickness of the rubber covering the surface of the impeller ceramic block 19 is 8mm.

[0101] In this embodiment, the wear-resistant ceramic material used in the ceramic layer 10, the sheath ceramic layer 16 and the impeller ceramic block 19 can be reaction sintered silicon carbide ceramic.

[0102] The above-mentioned ceramic and rubber composite metal overflow piece is trial-manufactured, the pump shell 4 is assembled with the overflow piece and the bearing assembly 2, and then installed on the bracket 1; in this embodiment, the pump shell 4 is made of QT500-7 material; all metal skeletons are made of Q235B material.

[0103] Embodiment 2

[0104] The large-scale wear-resistant ceramic and rubber composite metal slag pump for beneficiation in the embodiment comprises a bracket 1, a bearing assembly 2, a packing box 3, a pump shell 4, a front guard plate 5, a rear guard plate 6, a front sleeve 7, a rear sleeve 8 and an impeller 9.

[0105] The front guard plate 5 comprises a guard plate rubber layer 10, a guard plate ceramic layer 11 and a guard plate metal framework 12; the guard plate ceramic layer 10 is covered with the guard plate rubber layer 10 with a thickness of 12 mm on the surface;

[0106] In the embodiment, the guard plate ceramic layer 10 is divided into two circles along the radial direction, and each circle is divided into eight fan-shaped guard plate ceramic blocks 10a which are placed on the surface of the guard plate metal framework 12 along the circumferential direction; the guard plate ceramic blocks in the adjacent two circles are staggered, the guard plate ceramic blocks 10a in the outer circle are aligned with the outer edge of the guard plate, and the vulcanized rubber is limited by the mold without setting limiting blocks;

[0107] The guard plate ceramic block 10a is in the shape of a fan, as shown in Figure 6 The bottom surface is provided with nine glue passing holes 14a with a diameter of 10 mm, and a plurality of grooves 15 are provided around the four edges; when the rubber is vulcanized, the glue passing holes 14a and the grooves 15 are filled with rubber material, which plays a role of bonding and buffering between the guard plate ceramic blocks 10a; when vulcanized, the glue passing holes 14a also play a role of discharging air on the surface of the ceramic block;

[0108] The front sleeve 7 comprises a sleeve rubber layer 16, a sleeve ceramic layer 17 and a sleeve metal framework 18; in the embodiment, according to the wear condition of the slag pump, the sleeve ceramic layer 17 is divided into two sleeve ceramic blocks 17a along the circumferential direction of the sleeve rubber layer 16 in the area of the baffle of the sleeve rubber layer 16; as shown in Figure 9 The sleeve ceramic blocks 17a are fixed on the sleeve metal framework 18 by an adhesive, the edges of the sleeve ceramic blocks 17a are provided with second limiting blocks 13a to prevent circumferential displacement, and the sleeve ceramic blocks 17a are further embedded into the sleeve rubber layer 16;

[0109] The top contact edge and the bottom contact edge of the sleeve ceramic block 17a are provided with an inclined angle of 10°, which ensures that the contact between the sleeve ceramic block and the mold is surface contact when the sleeve ceramic block is subjected to the vulcanization pressure, preventing the ceramic from being crushed by local stress;

[0110] The sleeve ceramic block 17a is about 8 mm away from the rubber flow surface and about 20 mm away from the front and rear sleeve contact sealing surface, which prevents the sleeve ceramic layer 17 from being crushed when the sleeve rubber layer 16 is installed;

[0111] The impeller 9 comprises an impeller ceramic block 19, an impeller metal framework 20 and an impeller rubber layer 21; the impeller ceramic block 19 is inlaid in the wear-prone area of the impeller, including an impeller inlet circumferential area, an inner side circumferential area of a front cover plate, an inner side circumferential area of a rear cover plate, an outer side circumferential area of the rear cover plate and a blade working surface; the impeller ceramic block 19 is pre-fixed on the impeller metal framework 20 by using an adhesive, and is jointly placed in a mold to be formed by injection rubber vulcanization.

[0112] The impeller inlet circumferential ceramic block 19a is evenly divided into five blocks along the inlet circumferential direction, and the number is consistent with the number of impeller blades; the inner side circumferential ceramic block 19b of the front cover plate, the inner side circumferential ceramic block 19c of the rear cover plate and the blade working surface ceramic block 19e can be divided into multiple blocks according to the size of the impeller diameter and the wear area to prevent the ceramic from being broken under stress; the outer side circumferential ceramic block 19d of the rear cover plate is distributed in a fan shape along the outer diameter direction of the impeller and is evenly divided into 15 blocks; the rubber with a thickness of 8 mm is covered on the surface of the impeller ceramic block 19.

[0113] In the embodiment, the wear-resistant ceramic material used in the shield ceramic layer 10, the sheath ceramic layer 16 and the impeller ceramic block 19 can adopt reaction sintered silicon carbide ceramic.

[0114] The above-mentioned ceramic and rubber composite metal over-flowing piece is trial-produced, the pump shell 4 is assembled with the over-flowing piece and the bearing assembly 2, and is installed on the bracket 1; in the embodiment, the pump shell 4 adopts QT500-7 material; and all the metal frameworks adopt Q235B material.

[0115] Embodiment 3

[0116] The embodiment provides a preparation method of a wear-resistant ceramic and rubber composite metal composite material, and the preparation method comprises the following steps: the ceramic block is first cleaned by using toluene, the surface is first brushed with a curing agent, and then a layer of rubber adhesive is brushed, and the thickness of the rubber adhesive is 1 mm; after being placed for 2 hours, the ceramic block is combined with the metal framework and then placed in a mold to improve the initial adhesive strength and positioning, and the rubber vulcanization process is performed, the vulcanization temperature is 140 DEG C, the vulcanization pressure is 150 bar, and the vulcanization time is 4 hours.

[0117] The curing agent is two layers, which are divided into a primer and a topcoat; the primer adopts ch205, and the diluent adopts methyl ketone and acetone; the topcoat adopts ch220, and the diluent adopts dimethylbenzene or toluene; the rubber adhesive is a polymer of rubber particles and glue, and is used to enhance the adhesion between the rubber and the ceramic.

[0118] Embodiment 4

[0119] The embodiment provides another multi-material composite shield for a slurry pump, which comprises a rubber layer, a wear-resistant ceramic layer and a shield metal framework. A plurality of threaded holes are formed in one side surface of the shield metal framework, and screws are screwed into the threaded holes to fix the shield at a required position. Further,

[0120] The other side surface of the metal skeleton of the guard plate is provided with an annular groove, and the wear-resistant ceramic layer is located in the annular groove. Generally, the annular groove is filled with adhesive, and the adhesive can use resin, rubber or metal glue (the same below), so that the guard plate metal skeleton can be better fixed after solidification. At the same time, the wear-resistant ceramic layer and the guard plate metal skeleton are embedded in the rubber layer through the vulcanization injection molding process. Generally, there is a gap of 2-3mm between the outer edge of the wear-resistant ceramic layer and the corresponding edge of the annular groove to avoid direct contact. In this way, not only the guard plate metal skeleton and the wear-resistant ceramic layer are combined well, but also the elasticity of rubber and the wear resistance of ceramic are organically combined together, effectively prolonging the service life of the guard plate. Optimization:

[0121] The wear-resistant ceramic layer includes an inner ring and an outer ring. Obviously, the outer ring is sleeved outside the inner ring. The outer edge of the inner ring is provided with a plurality of inner positioning opening slots, and the inner edge of the outer ring is provided with a plurality of outer positioning opening slots, the inner positioning opening slots and the outer positioning opening slots correspond to each other, and the inner positioning opening slots and the corresponding outer positioning opening slots are filled with adhesive. That is, the inner positioning opening slots and the outer positioning opening slots are semicircular but not limited to semicircular, and the corresponding inner positioning opening slots and outer positioning opening slots are in a relatively closed circular shape (or other closed shape) after being positioned. The adhesive in the annular groove also enters the formed circular interior, and the adhesive solidifies to make the positions of the inner ring and the outer ring more stable;

[0122] And the split design makes the processing more convenient.

[0123] The inner ring is evenly divided into an even number of inner unit segments, such as 8 segments, each of which is in the shape of a sector, and an inner unit positioning opening slot is formed on the connecting edge of the inner unit segment, and the inner unit positioning opening slots on adjacent inner unit segments correspond to each other. The so-called connecting edge refers to the edge of the two adjacent inner unit segments. In addition, the inner unit positioning opening slots and the corresponding inner unit positioning opening slots are filled with adhesive. Similarly, the outer ring is evenly divided into an even number of outer unit segments, such as 8 segments, each of which is in the shape of a sector. An outer unit positioning opening slot is formed on the connecting edge of the outer unit segment, and the outer unit positioning opening slots on adjacent outer unit segments correspond to each other. The so-called connecting edge refers to the edge of the two adjacent outer unit segments. In addition, the outer unit positioning opening slots and the corresponding outer unit positioning opening slots are filled with adhesive. That is, the inner ring and the outer ring are also divided into several segments, and the solidified adhesive is clamped in the circular holes formed by the corresponding inner unit positioning opening slots and the circular holes formed by the corresponding outer unit positioning opening slots, further reducing the processing difficulty, and the solidified adhesive makes the inner ring and the outer ring of the split design more closely combined. Further optimization:

[0124] The number of the inner unit segments and the outer unit segments is equal, and the inner unit segments and the outer unit segments are distributed in a staggered manner. That is, the joint of two inner unit segments is located at the middle of the inner edge of one outer unit segment. In this way, the integrity of the joint is further increased.

[0125] In the embodiment, the wear-resistant ceramic layer is made of recrystallized ceramic material.

[0126] Embodiment 5

[0127] The embodiment provides a composite sheath for a slurry pump. The composite sheath is generally used in cooperation with a front sheath and a rear sheath which are symmetrically distributed. The embodiment describes one sheath (the front sheath or the rear sheath). Specifically, the composite sheath comprises a sheath rubber layer, a sheath metal framework, and a tongue (a sheath ceramic block).

[0128] The sheath comprises a sheath rubber layer, a sheath metal framework, and a tongue (a sheath ceramic block). The tongue is prefabricated from recrystallized silicon carbide ceramic material. The back surface of the tongue is provided with a groove, and the sheath metal framework is provided with a protrusion. That is, during assembly, the protrusion is clamped in the corresponding groove, and the back surface of the tongue and one side of the protrusion of the sheath metal framework are attached. At the same time, after the sheath metal framework and the tongue are assembled together, the sheath rubber layer is integrally embedded in the sheath rubber layer by using a rubber injection molding process. That is, the sheath rubber layer integrally covers the sheath metal framework and the tongue. In this way, the high wear resistance of the ceramic and the good elasticity of the rubber are organically combined, and the tongue has relatively stable support, thereby effectively prolonging the service life of the sheath.

[0129] Optimized:

[0130] The thickness of the sheath rubber layer wrapping the tongue is 5-10 mm. That is, the surface of the tongue is 5-10 mm away from the flow surface of the sheath rubber layer. In this way, the thickness of the sheath rubber layer is reasonably set to prevent the tongue from being subjected to large vibration and ore slurry impact during use, thereby reducing the probability of tongue falling off and cracking.

[0131] The cross section of the groove is circular, square, or other irregular shapes. The cross section refers to a transverse section rather than a longitudinal section. The sheath metal framework is provided with a plurality of metal blocks for forming bolt holes on the sheath metal framework. The metal blocks can be pre-set on the metal framework by welding or other methods, or can be formed by making the local thickness larger when the metal framework is prepared.

[0132] Embodiment 6

[0133] The embodiment provides another impeller for a slurry pump. The slurry pump impeller comprises a wear-resistant ceramic layer, an impeller rubber layer, and an impeller metal framework composed of a front cover plate, a rear cover plate, and a plurality of blades.

[0134] The impeller metal framework can improve the stability of the mechanical properties of the slurry pump impeller.

[0135] The front cover plate and the rear cover plate are oppositely arranged, and the plurality of blades are arranged between the front cover plate and the rear cover plate, and the front cover plate and the rear cover plate are connected through the plurality of blades.

[0136] The wear-resistant ceramic layer is arranged on the surface of the impeller metal framework, the impeller rubber layer includes a first impeller rubber layer and a second impeller rubber layer, the first impeller rubber layer is arranged between the wear-resistant ceramic layer and the impeller metal framework, and the second impeller rubber layer is arranged on the surface of the wear-resistant ceramic layer and the impeller metal framework.

[0137] The impeller rubber layer is formed on the surface of the wear-resistant ceramic layer and the impeller metal framework and between the wear-resistant ceramic layer and the impeller metal framework by using a vulcanization injection process, and plays a role of adhesion and buffering.

[0138] In order to prevent the wear-resistant ceramic layer from moving when the impeller rubber layer is injected, the wear-resistant ceramic layer is preliminarily fixed on the impeller metal framework by using an adhesive, and after being preliminarily fixed, the impeller metal framework and the wear-resistant ceramic layer are integrally placed in a mold, and the impeller rubber layer is filled into the gap between the wear-resistant ceramic layer and the impeller metal framework by using an injection method.

[0139] By arranging the wear-resistant ceramic layer on the surface of the impeller metal framework, the high hardness, wear resistance and corrosion resistance of the ceramic are utilized, so that the local wear resistance of the impeller of the slurry pump can be improved. By arranging the first impeller rubber layer between the wear-resistant ceramic layer and the impeller metal framework and arranging the second impeller rubber layer on the surface of the wear-resistant ceramic layer and the impeller metal framework, the elasticity and impact absorption characteristics of the first impeller rubber layer and the second impeller rubber layer are utilized, so that the impact of the solid particles on the wear-resistant ceramic layer can be reduced, and the risk of fragmentation of the impeller of the slurry pump can be reduced.

[0140] The middle part of the front cover plate is provided with an impeller suction inlet. The fluid enters the impeller of the slurry pump from the impeller suction inlet.

[0141] The wear-resistant ceramic layer includes a first wear-resistant ceramic layer, a second wear-resistant ceramic layer, a third wear-resistant ceramic layer and a fourth wear-resistant ceramic layer, the first wear-resistant ceramic layer is arranged on the inner side of the front cover plate facing the rear cover plate, the second wear-resistant ceramic layer is arranged on the inner side of the rear cover plate facing the front cover plate, the third wear-resistant ceramic layer is arranged on the outer side of the rear cover plate facing the front cover plate, and the fourth wear-resistant ceramic layer is arranged on the working surface of each blade.

[0142] The wear-resistant ceramic layer is arranged in the areas (the inner side of the front cover plate facing the rear cover plate, the inner side of the rear cover plate facing the front cover plate, the outer side of the rear cover plate facing the front cover plate and the working surface of the blade) of the impeller of the slurry pump which are prone to wear according to the use experience.

[0143] The first wear-resistant ceramic layer includes a plurality of first wear-resistant ceramic blocks, which are arranged at intervals along the circumferential direction of the inner side surface of the front cover plate; the second wear-resistant ceramic layer includes a plurality of second wear-resistant ceramic blocks, which are arranged at intervals along the circumferential direction of the inner side surface of the rear cover plate; the third wear-resistant ceramic layer includes a plurality of third wear-resistant ceramic blocks, which are arranged at intervals along the circumferential direction of the outer side surface of the rear cover plate; and the fourth wear-resistant ceramic layer includes a plurality of fourth wear-resistant ceramic blocks, which are arranged at intervals on the working surface of each blade.

[0144] The first wear-resistant ceramic layer, the second wear-resistant ceramic layer and the third wear-resistant ceramic layer are divided into small ceramic blocks along the circumferential direction of the front cover plate and the rear cover plate according to the diameter of the slurry pump impeller and the ceramic forming process, and the fourth wear-resistant ceramic layer is divided into small ceramic blocks and arranged at intervals on the blades, which can solve the process difficulty that wear-resistant ceramics are difficult to be large-sized. In addition, the division of the first wear-resistant ceramic layer, the second wear-resistant ceramic layer, the third wear-resistant ceramic layer and the fourth wear-resistant ceramic layer into small blocks can reduce the cost of the slurry pump impeller.

[0145] The number of the first wear-resistant ceramic blocks, the second wear-resistant ceramic blocks, the third wear-resistant ceramic blocks and the fourth wear-resistant ceramic blocks can be the same or different, and a person skilled in the art can set them according to the actual situation, which is not limited here.

[0146] The plurality of first wear-resistant ceramic blocks include at least one of silicon carbide ceramic, silicon nitride combined silicon carbide ceramic, silicon oxide combined silicon carbide ceramic and recrystallized ceramic.

[0147] For example, all the plurality of first wear-resistant ceramic blocks are silicon carbide ceramic, or a part of the plurality of first wear-resistant ceramic blocks are silicon carbide ceramic, and the remaining part of the plurality of first wear-resistant ceramic blocks are silicon nitride combined silicon carbide ceramic. That is, the plurality of first wear-resistant ceramic blocks can be composed of any one of silicon carbide ceramic, silicon nitride combined silicon carbide ceramic, silicon oxide combined silicon carbide ceramic and recrystallized ceramic alone or freely combined.

[0148] The plurality of second wear-resistant ceramic blocks include at least one of silicon carbide ceramic, silicon nitride combined silicon carbide ceramic, silicon oxide combined silicon carbide ceramic and recrystallized ceramic.

[0149] For example, all the plurality of second wear-resistant ceramic blocks are silicon carbide ceramic, or a part of the plurality of second wear-resistant ceramic blocks are silicon carbide ceramic, and the remaining part of the plurality of second wear-resistant ceramic blocks are silicon nitride combined silicon carbide ceramic. That is, the plurality of second wear-resistant ceramic blocks can be composed of any one of silicon carbide ceramic, silicon nitride combined silicon carbide ceramic, silicon oxide combined silicon carbide ceramic and recrystallized ceramic alone or freely combined.

[0150] The plurality of third wear-resistant ceramic blocks include at least one of silicon carbide ceramics, silicon nitride-bonded silicon carbide ceramics, silicon oxide ceramics-bonded silicon carbide ceramics, and recrystallized ceramics.

[0151] For example, the plurality of third wear-resistant ceramic blocks are all silicon carbide ceramics, or some of the plurality of third wear-resistant ceramic blocks are silicon carbide ceramics, and the remaining ceramic blocks are silicon nitride-bonded silicon carbide ceramics. In other words, the plurality of third wear-resistant ceramic blocks can be composed of any one of silicon carbide ceramics, silicon nitride-bonded silicon carbide ceramics, silicon oxide ceramic-bonded silicon carbide ceramics, and recrystallized ceramics, either alone or in combination.

[0152] The plurality of fourth wear-resistant ceramic blocks include at least one of silicon carbide ceramics, silicon nitride-bonded silicon carbide ceramics, silicon oxide-bonded silicon carbide ceramics, and recrystallized ceramics.

[0153] For example, the plurality of fourth wear-resistant ceramic blocks are all silicon carbide ceramics, or some of the plurality of fourth wear-resistant ceramic blocks are silicon carbide ceramics, and the remaining ceramic blocks are silicon nitride-bonded silicon carbide ceramics. In other words, the plurality of fourth wear-resistant ceramic blocks can be composed of any one of silicon carbide ceramics, silicon nitride-bonded silicon carbide ceramics, silicon oxide ceramic-bonded silicon carbide ceramics, and recrystallized ceramics, either alone or in combination.

[0154] Wherein, a plurality of glue holes are respectively provided on the surfaces of the front cover plate and the rear cover plate.

[0155] The rubber is injected into the gap between the wear-resistant ceramic layer and the metal frame through the glue holes, thereby forming the first impeller rubber layer. The multiple glue holes facilitate injection of the first impeller rubber layer and help uniformize the first impeller rubber layer.

[0156] Among them, those skilled in the art can set the number of glue holes according to actual conditions, and no specific limitation is made here.

[0157] The diameter of each glue hole ranges from 10 to 20 mm.

[0158] Among them, the impeller rubber layer is used as a flexible and wear-resistant material.

[0159] Among them, the flexible wear-resistant material is highly elastic wear-resistant rubber.

[0160] A raised portion is provided in the middle of the rear cover plate, and a threaded hole for matching and connecting with the pump shaft of the slurry pump is provided at the center of the raised portion.

[0161] Wherein, each blade is in the shape of an arc.

[0162] In summary, the slurry pump impeller provided in this embodiment is capable of improving the local wear resistance of the slurry pump impeller by arranging a wear-resistant ceramic layer on the surface of the impeller metal skeleton and utilizing the high hardness, wear resistance and corrosion resistance of the ceramic. By arranging an impeller rubber layer (first impeller rubber layer) between the wear-resistant ceramic layer and the metal skeleton, and arranging an impeller rubber layer (second impeller rubber layer) on the surface of the wear-resistant ceramic layer and the metal skeleton, and utilizing the elasticity and impact absorption characteristics of the impeller rubber layer, the impact of solid particles on the wear-resistant ceramic layer can be reduced, thereby reducing the risk of fragmentation of the slurry pump impeller. In addition, the slurry pump impeller has a built-in metal skeleton, so the mechanical properties are stable. Therefore, the slurry pump impeller has better wear resistance, impact resistance and stability, and a long service life.

[0163] The protection content of the present invention is not limited to the above embodiments. Without departing from the spirit and scope of the utility model, any changes and advantages that can be thought of by those skilled in the art are included in the present invention and are protected by the appended claims.

Claims

1. A wear-resistant ceramic and rubber composite metal slurry pump flow part, characterized in that: The flow-through member comprises a front guard plate (5), a rear guard plate (6), a front sheath (7), a rear sheath (8) and an impeller (9); a rubber layer is filled between the wear-resistant ceramic block and the surface of the metal frame, and / or between the wear-resistant ceramic block and the metal frame; the wear-resistant ceramic block is bonded to the metal frame in the wear-prone area of ​​the flow-through member by rubber and / or adhesive.

2. The flow-through member according to claim 1, wherein: The front guard plate (5) and the rear guard plate (6) both include a guard plate rubber layer (10), a guard plate ceramic layer (11) and a guard plate metal frame (12); the guard plate ceramic layer (11) and the guard plate rubber layer (10) are composited on the surface of the guard plate metal frame (12); the guard plate metal frame (12) includes an integrated hollow metal cylinder and a flat metal ring fixed to one end of the hollow metal cylinder, the inner ring size of the flat metal ring matches the inner diameter of the hollow metal cylinder; an annular groove is provided on the lower surface of the guard plate metal frame (12), and the guard plate ceramic layer (11) is provided in the annular groove; the guard plate rubber layer (10) is provided on the inner surface of the hollow metal cylinder and the lower surface of the guard plate metal frame (12), and / or the guard plate rubber layer is provided between the wear-resistant ceramic block and the guard plate metal frame (12).

3. The flow-through member according to claim 2, characterized in that: The guard plate ceramic layer (11) is divided into at least one circle along the radial direction according to the diameter of the guard plate, and each circle is divided into one or more guard plate ceramic blocks (10a).

4. The flow-through member according to claim 3, wherein: The guard plate ceramic block (10a) is fan-shaped, with a dovetail groove (14) and / or a glue hole (14a) provided at the bottom, and a plurality of grooves (15) provided around the four sides; the cross-sectional shape of the grooves (15) includes a rectangle or a circle.

5. The overflow member according to claim 3, characterized in that: When the guard plate ceramic layer (11) is a circle, first limit blocks (13) are arranged at equal intervals on the periphery of the guard plate ceramic block (10a); the first limit blocks (13) are fixed to the guard plate metal frame (12) by welding; When the guard plate ceramic layer (11) is larger than one circle, the guard plate ceramic blocks (10a) in two adjacent circles are staggered, the guard plate ceramic blocks (10a) in the outer circle are aligned with the outer edge of the guard plate, and no limiting blocks are provided.

6. The overflow member according to claim 1, wherein: The front sheath (7) and the rear sheath (8) both comprise a sheath rubber layer (16), a sheath ceramic layer (17) and a sheath metal frame (18); The sheath ceramic layer (17) is arranged at a wear-prone position of the sheath and is divided into one or more sheath ceramic blocks (17a) along the circumferential direction of the sheath; the sheath metal skeleton (18) is attached to the side wall of the sheath rubber layer (16); the sheath ceramic blocks (17a) are fixed on the sheath metal skeleton (18); the sheath ceramic layer (17) is provided with second limit blocks (13a) along both sides of the sheath metal skeleton (18), and the second limit blocks (13a) are welded to the sheath metal skeleton (18); The sheath ceramic block (17a) and the second limiting block (13a) are both embedded in the sheath rubber layer (16).

7. The flow-through member according to claim 6, characterized in that: The curved surface shape of the sheath ceramic block (17a) is consistent with the flow surface of the sheath, and the top contact edge and the bottom contact edge are respectively set with bevel angles.

8. The overflow member according to claim 1, wherein: The impeller (9) comprises an impeller ceramic block (19), an impeller metal frame (20) and an impeller rubber layer (21); the impeller ceramic block (19) is embedded in an impeller area susceptible to wear; the area susceptible to wear comprises the impeller inlet circumference, the inner circumference of the front cover plate, the inner circumference of the rear cover plate, the outer circumference of the rear cover plate, and the blade working surface; the impeller ceramic block (19) comprises an impeller inlet circumference ceramic block (19a), a front cover plate inner circumference ceramic block (19b), a rear cover plate inner circumference ceramic block (19c), a rear cover plate outer circumference ceramic block (19d), and a blade working surface ceramic block (19e); the impeller ceramic block (19) is pre-fixed on the impeller metal frame (20) with an adhesive; the impeller rubber layer (21) is arranged between the impeller ceramic block (19) and the impeller metal frame (20) and / or on the surface of the impeller ceramic block (19) and the impeller metal frame (20).

9. The overflow member according to claim 8, characterized in that: The number of the impeller inlet circumferential ceramic blocks (19a) evenly divided along the inlet circumferential direction is consistent with the number of impeller blades; the front cover plate inner circumferential ceramic blocks (19b), the rear cover plate inner circumferential ceramic blocks (19c), and the blade working surface ceramic blocks (19e) are complete ceramic blocks or divided into multiple ceramic blocks; the rear cover plate outer circumferential ceramic blocks (19d) are fan-shaped distributed along the impeller outer diameter direction and are evenly divided into one or more.

10. The flow-through member according to claim 1, wherein: The metal skeleton is made of high chromium alloy, Q235B carbon structural steel or QT500-7 ductile iron.

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