CN111456970A - Wear-resistant pump body and manufacturing method thereof - Google Patents

Abstract

The invention discloses a wear-resistant pump body and a manufacturing method thereof, and the wear-resistant pump body comprises a shell and a lining arranged on the inner side of the shell, wherein a water inlet is arranged on one side of the shell, the shell is provided with an A-A plane and a water outlet, the shell comprises a front shell and a rear shell which are detachably connected along the A-A plane, the lining comprises a plurality of curved plates which can be sequentially spliced, and the lining also comprises a front annular plate arranged on one side close to the water inlet and a rear annular plate arranged on the other side; and a buffering wear-resistant layer is arranged between the shell and the lining. The invention has the advantages that the manufacturing cost of the wear-resistant pump can be obviously reduced, the coarse particle scouring resistance of the wear-resistant pump body is improved, the service life of the pump body is prolonged, the reliability of the pump body is improved, and the large-scale pump is easy to realize by selecting the reasonable splicing mode of the ceramic lining and the reasonable shape and the external dimension of the curved plate.

Description

Wear-resistant pump body and manufacturing method thereof

Technical Field

The invention relates to rotary power pump equipment, in particular to a wear-resistant pump body and a manufacturing method thereof.

Background

In the industries of ore dressing, smelting and the like, a centrifugal pump is often used for conveying a certain abrasive solid-liquid two-phase flow, and a wear-resistant pump is often used. The overflowing parts of the abrasion-resistant pump are seriously abraded, wherein the abrasion-resistant pump body is one of the most seriously abraded parts, in order to prolong the service life of the abrasion-resistant pump, the pump body is required to be made of abrasion-resistant materials, the most commonly used abrasion-resistant materials comprise abrasion-resistant alloy and rubber, but the performances of the two abrasion-resistant materials can not meet the use requirements of many working conditions.

In recent years, techniques for manufacturing a wear-resistant pump body from a ceramic material, such as CN108425850A, have been disclosed, in which a metal casing is used to cover a volute made of silicon carbide ceramic material, and resin is filled between the ceramic volute and the metal casing to fix the volute. The technology has the advantages of simple structure, high reliability and good wear resistance; the ceramic volute has the defects that the ceramic volute is difficult to manufacture and high in cost, the volute is complex in structure and high in forming difficulty, the ceramic volute is easy to deform or crack in the drying and sintering processes, and meanwhile, the volute is of a hollow structure and occupies a large furnace space in the sintering process, so that the sintering cost is obviously increased. Meanwhile, due to the technological characteristics of the ceramic parts, the yield of the large-scale ceramic parts is very low during sintering, so that the technology has great difficulty in both cost and technology when manufacturing large-scale pump bodies. Another technique, as shown in fig. 11, is to arrange a ceramic layer 3 in a metal casing 1, and arrange a wear-resistant layer 2 composed of wear-resistant particles and resin between the ceramic layer 3 and the metal casing, where the ceramic layer 3 is formed by splicing a large number of small ceramic sheets, similar to a mosaic structure, so that a ceramic lining layer can be spliced by only a small number of small ceramic sheets or even a small size of ceramic sheets, and thus the manufacturing process of the ceramic sheets is simple, and many dies are not needed, but this technique also has significant disadvantages in practical use, mainly because the outer dimensions of the ceramic sheets are small, a large number of uneven seams exist between the ceramic sheets, and the impact of coarse particles (generally particles having a particle size of 1-10 mm) in the medium on the seams is large, which results in a great reduction in the resistance of the lining to the erosion of the coarse particles, particularly, in the joint plane of the front pump body and the rear pump body, the ceramic layers between the front pump body and the rear pump body are easy to be displaced during construction and assembly, and the small ceramic plates at the positions are easy to be worn by coarse particles in a medium due to the fact that the difference between the mass (weight) of the small ceramic plates and the particles in the medium is not large in use.

In conclusion, the wear-resistant pump body lining in the prior art has the problems of high manufacturing process difficulty, high manufacturing cost, short service life, high use cost, difficulty in large-scale production and the like.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to provide a wear-resistant pump body. The invention overcomes the defects of difficult forming of the inner lining of the pump body, large space of a furnace and a kiln during sintering, low yield and high manufacturing cost caused by overlarge external dimension, divides the inner lining into the curved plates with the areas and the shapes suitable for casting forming, can greatly reduce the forming difficulty and improve the sintering yield.

The invention also provides a manufacturing method of the wear-resistant pump body. According to the invention, by selecting a reasonable splicing mode of the ceramic lining and a reasonable shape and external dimension of the curved plate, the manufacturing cost of the wear-resistant pump can be obviously reduced, the coarse particle scouring resistance of the wear-resistant pump body is improved, the service life of the pump body is prolonged, the reliability of the pump body is improved, and the large-scale pump is easy to realize.

The invention relates to a wear-resistant pump body which comprises a hollow volute-shaped shell and a lining arranged on the inner side of the shell, wherein a water inlet is formed in one side of the shell, the shell is provided with an A-A plane and a water outlet, the shell comprises a front shell and a rear shell which are detachably connected along the A-A plane, the lining comprises a plurality of curved plates which can be sequentially spliced, and the lining also comprises a front annular plate arranged on one side close to the water inlet and a rear annular plate arranged on the other side; and a buffering wear-resistant layer is arranged between the shell and the lining.

Preferably, the curved plate, the front annular plate and the rear annular plate are made of silicon carbide and/or silicon nitride, the components of the buffering wear-resistant layer comprise wear-resistant particles and a binder, and the wear-resistant particles are one or more of silicon carbide, aluminum oxide, silicon nitride, garnet and zirconia.

Preferably, the number of the curved plates is 3-40, the projection angle α of the curved plates in the axial direction is 15-150 degrees, and the area of the working surface of the curved plate is 0.02-0.2m²。

Preferably, the contour lines of the splicing parts between the adjacent curved plates are mutually matched, and the inner contour formed by sequentially splicing all the curved plates is mutually matched with the outer contour of the front annular plate and/or the rear annular plate; the front annular plate and the rear annular plate are both in an integral annular shape or in an annular shape formed by splicing 2-16 sectors.

Preferably, the curved plate is provided with a plane for splicing with another curved plate symmetrically arranged in the plane a-a and a lip extending towards the outside along the plane a-a, said plane being coincident with or parallel to the plane a-a.

Preferably, the pump comprises a front pump body and a rear pump body, and a sealing gasket is arranged between the front pump body and the rear pump body; the front pump body comprises a front shell, a curved plate, a front annular plate and a buffering wear-resistant layer; the rear pump body comprises a detachable rear shell and a rear lining, the rear lining comprises a curved plate, a rear annular plate and a buffering wear-resistant layer, and the rear lining also comprises a rear lining framework embedded in the buffering wear-resistant layer; and a space for placing a pressure reducing cover or a mechanical seal box is reserved between the rear lining framework and the rear shell.

Preferably, a volute and rear pump cover fitted through the aperture/shaft; the volute comprises a front shell, a rear shell, a curved plate, a front annular plate and a buffering wear-resistant layer arranged on the volute side; the rear pump cover comprises a rear pump cover framework, a rear annular plate and a wear-resistant buffer layer arranged on the rear pump cover.

Preferably, the inner side wall of the water inlet is provided with a plurality of small ceramic plates, and the area of the working surface of a single small ceramic plate is smaller than 1/5 of the area of a single curved plate.

Preferably, the pump cover comprises a volute, a rear pump cover and a front pump cover, wherein the rear pump cover comprises a rear pump cover framework, a rear annular plate and a buffering wear-resistant layer arranged on the rear pump cover; the front pump cover comprises a front pump cover framework, a front annular plate and a buffering wear-resistant layer arranged on the front pump cover; the volute comprises a front shell, a rear shell, a curved plate and a buffering wear-resistant layer arranged in the volute; the scroll and the rear pump cover and the scroll and the front pump cover are fixedly connected through hole/shaft matching respectively.

The invention relates to a manufacturing method of a wear-resistant pump body, which is characterized by comprising the following steps of:

1) making a ceramic lining model of the sheath;

2) cutting the ceramic lining model into curved plate models with designed quantity;

3) manufacturing a front annular plate model and a rear annular plate model;

4) copying a casting mold by using the cut curved plate model, the front annular plate model and the rear annular plate model;

5) injecting the prepared slurry into a casting mold;

6) demolding and drying;

7) putting the dried blank into a sintering furnace for sintering;

8) placing the inner die of the front pump body on a die positioning plate;

9) sequentially placing the curved ceramic plates on corresponding parts of the inner mold of the front pump body and placing the front annular plate;

10) placing the front shell on a mould positioning plate;

11) injecting a mixture of wear-resistant particles and a binder into a space between the front shell and the ceramic lining, and exhausting air;

12) hardening the adhesive according to the hardening condition of the adhesive;

13) removing the mould;

14) the rear pump body is manufactured according to the same method and is matched and connected with the front pump body through bolts.

Advantageous effects

Compared with the prior art, the wear-resistant pump body has the advantages that:

1. the method overcomes the defects of difficult forming of the integral ceramic lining in CN108425850A similar to the prior art, large furnace kiln space, low yield and high manufacturing cost during sintering due to overlarge external dimension, divides the lining into curved plates with areas and shapes suitable for casting forming, can greatly reduce forming difficulty and improve sintering yield, and can occupy much smaller furnace kiln space (i.e. improve the utilization rate of unit space) to reduce firing cost because the projection angle α of the curved plates in the axial direction is less than 150 degrees and the curved plates are similar to tiles in shape during sintering, and can be overlapped like firing the tiles, thereby reducing the firing cost, and simultaneously when the area of the working surface (the surface in contact with fluid) of the curved plates is less than 0.2m²The deformation amount generated by sintering is small,can improve the fit degree of the curved plate when the curved plate is spliced, reduce the dislocation of the curved plate at the joint, and the working surface area of the curved plate is less than 0.2m²The other advantage of (2) is that the adhesive of the buffering wear-resistant layer tends to shrink in volume when being hardened, but the size of the ceramic does not change in the process, so that the ceramic plate with large area is easy to crack or fall off from the buffering wear-resistant layer when the adhesive is hardened and shrunk, and the area of the curved plate is controlled to be 0.2m²In addition, the ceramic plate can be effectively prevented from cracking or falling off.

2. The reaction sintering silicon carbide and the silicon nitride combined silicon carbide have good wear resistance, the two optimal ceramic forming modes adopt a casting forming process, the forming is difficult when the area of the curved plate is too large or too small, waste products are easy to generate during forming when the area is too large, the yield is low, the area is too small, the forming workload can be obviously increased, the production cost is increased, and when the area of the working surface of the curved plate is 0.02-0.2m²In this case, the molding yield and the molding cost can be kept at a good level.

3. Compared with the prior art of combining ceramic layers by a large number of ceramic plates with the same shape and small working area like CN106837875A, the invention has the advantages that when the number of the curved plates is less than 40, the projection angle of the curved plates in the axial direction is more than 15 degrees, and the working surface area of the curved plates is more than 0.02m²The following results are obtained: the ceramic plates are easy to splice, and after the annular plates with simple shapes are placed, numbered curved plates are sequentially placed, so that the splicing workload is less, and the size of the splicing seams is smaller.

4. Because the curved plates are different in shape, the types of the curved plates are reduced as much as possible in order to reduce the types of the dies and the difficulty of splicing, and the area of the working surface of the curved plate is not more than 0.2m²On the premise that the angle of axial projection is not more than 150 degrees, the smaller the number of the curved plates is, the lower the manufacturing cost is, so that the number of the curved plates is not more than 40 for a large pump body, and is not less than 3 for a small pump body; the number of curved plates is selected within this range, which results in a pump body with lower manufacturing costs and a longer life.

5. The contour lines of the adjacent curved plates at the splicing part are mutually matched, and the inner contour of the spliced curved plates is matched with the outer contour of the front annular plate or the rear annular plate, so that the narrow splicing gap of the ceramic lining can be ensured, the abrasion-resistant particles in the gap are prevented from being washed by coarse particles, and the service life of the abrasion-resistant pump body is prolonged.

6. The front annular plate or the rear annular plate on two sides of the pump body is preferably a regular annular or conical annular plate, for a small pump, the annular plate can be composed of an annular or conical annular ceramic plate, and for a large pump, the annular plate can be formed by splicing 2-16 sector plates with the same shape, so that the ceramic part has a reasonable area; the manufacturability is improved.

7. The purpose of arranging the buffering wear-resistant layer at the outer side of the ceramic lining is three, one is that the resin of the buffering wear-resistant layer can firmly fix the ceramic plate and absorb the impact energy applied to the ceramic plate, thereby being beneficial to preventing the ceramic plate from being broken due to impact, secondly, the wear-resistant particles in the buffer wear-resistant layer have good fine particle scouring resistance, the splicing seams between the ceramic plates can be filled with the mixture of the wear-resistant particles and resin in the pump body processing process, because the width of the splicing seam can be controlled to be about 2mm, and the particles larger than 2mm can not be washed into the splicing seam, the wear-resistant particles in the splicing seam can be protected by the ceramic plate and can obtain longer service life, thirdly, the buffering wear-resistant layer has better wear resistance, and when the ceramic is worn or cracked or falls off due to some reason, the pump can still work for a period of time, so that the service life of the pump can be prolonged.

8. The metal shell comprises a front shell and a rear shell, the front shell and the rear shell are buckled through a plane A-A of the water outlet and are connected together through a bolt, the structure can solve the problems of installation and removal of a mould in the manufacturing process, and meanwhile, the curved plate can be conveniently placed and positioned in the manufacturing process.

9. Arranging a sealing surface of the curved plate, which is coincident with or parallel to the plane A-A; the problem of sealing and abrasion resistance of the front pump body and the rear pump body in the A-A plane after the front pump body and the rear pump body are manufactured respectively can be solved, and therefore after the front pump body and the rear pump body are combined, the gap of the joint seam between the curved plates of the front pump body and the rear pump body is small, and therefore the joint seam can be prevented from being abraded rapidly.

10. Due to the process, after the front pump body and the rear pump body are assembled, the curved plate of the A-A plane is easy to generate dislocation at the joint, the dislocation enables the wear resistance of the joint of the A-A plane to be reduced, the lip edge which extends outwards along the A-A sealing surface is arranged on the curved ceramic plate, the thickness of the ceramic plate at the position is equivalently thickened, the wear resistance of the position can be improved on the premise of hardly increasing the cost, and the service life of the pump body is prolonged.

11. The wear-resistant pump body is formed by combining a front pump body and a rear pump body, and a sealing gasket is arranged between the front pump body and the rear pump body; the front pump body is an inseparable whole formed by combining a front shell and a front lining, and the front lining comprises a ceramic lining and a buffering wear-resistant layer; the rear pump body is formed by combining a detachable rear shell and a rear lining, the rear lining comprises a ceramic lining and a buffering wear-resistant layer, the rear lining framework is embedded into the buffering wear-resistant layer, and a space for placing the pressure reducing cover is arranged between the rear lining framework and the rear shell;

12. wear-resisting pump body volute and back pump cover are constituteed, the two passes the hole/axle cooperation, the volute includes preceding shell, back shell, the curved plate, preceding annular plate, the buffering wearing layer of volute side, preceding shell, back shell, the curved plate, preceding annular plate, the buffering wearing layer of volute side is bonded into a whole by the bonding agent, back pump cover includes back pump cover skeleton, back annular plate, the buffering wearing layer on the back pump cover, the pump cover skeleton, back annular plate, the buffering wearing layer on the back pump cover is bonded into a whole that can not split by the bonding agent, A-A planar sealed reliability and life problem can be solved to this kind of structure, improve the intensity of volute, the dismouting of the pump of being convenient for.

13. The wear-resistant pump body consists of a volute, a rear pump cover and a front pump cover, wherein the rear pump cover comprises a rear pump cover framework, a rear annular plate and a buffering wear-resistant layer arranged in the rear pump cover; the rear pump cover framework, the rear annular plate and the buffering wear-resistant layer arranged in the rear pump cover are bonded into an integral body which cannot be disassembled by the adhesive in the buffering wear-resistant layer; the front pump cover comprises a front pump cover framework, a front annular plate and a buffering wear-resistant layer arranged on the front pump cover, and the front pump cover framework, the front annular plate and the buffering wear-resistant layer arranged on the front pump cover are bonded into an integral body which cannot be disassembled by an adhesive in the buffering wear-resistant layer; the volute comprises a front shell, a rear shell, a curved plate and a buffering wear-resistant layer arranged in the volute, wherein the front shell, the rear shell, the curved plate and the buffering wear-resistant layer arranged in the volute are bonded into an integral body which cannot be disassembled by using adhesives; the volute and the rear pump cover are matched through a hole/shaft and are connected through a rear pump cover bolt; the volute and the front pump cover are matched through the hole/shaft, and are connected through the front pump cover bolt, so that the sealing problem of the A _ A plane can be solved, the strength of the volute is improved, the pump is convenient to disassemble and assemble, spare parts can be replaced according to the abrasion condition during maintenance, and the maintenance cost is reduced.

14. In the local position where the overflow surface is not seriously worn, such as the position of a feeding pipe or the position of a discharging pipe, the technology of splicing small ceramic plates similar to CN106837875A can be still adopted to ensure that the service life of the wear-resistant pump body is not shortened, so that the types and specifications of the curved plates can be reduced.

15. In conclusion, the manufacturing cost of the wear-resistant pump can be obviously reduced, the coarse particle scouring resistance of the wear-resistant pump body is improved, the service life of the pump body is prolonged, the reliability of the pump body is improved, and the large-scale pump is easy to realize by selecting the reasonable splicing mode of the ceramic lining and the reasonable shape and the external dimension of the curved plate.

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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a sectional view of embodiment 1 of the present invention;

FIG. 2 is a schematic view showing a structure in which a curved plate and a ring plate are combined in example 1 of the present invention;

FIG. 3 is a schematic structural view of a rear pump body according to embodiment 1 of the present invention after the curved plates are assembled;

fig. 4 is a schematic structural view of a curved plate after being spliced in embodiment 2 of the present invention;

FIG. 5 is a schematic structural view of a curved plate in example 3 of the present invention;

FIG. 6 is a sectional view of embodiment 4 of the present invention;

FIG. 7 is a partial enlarged view at B in FIG. 6;

FIG. 8 is a schematic view showing a structure in which a curved plate and a ring plate are combined in example 4 of the present invention;

FIG. 9 is a sectional view of embodiment 5 of the present invention;

FIG. 10 is a schematic view of the front body fabrication of the present invention;

fig. 11 is a sectional view of a structure of the prior art.

Detailed Description

Example 1

As shown in fig. 1, 2 and 3, embodiment 1 of the present invention is a wear-resistant pump body of a medium pump, the wear-resistant pump body includes a metal casing and a ceramic lining, wherein the metal casing includes a front casing 001 and a rear casing 005, a water inlet 008 is disposed on the front casing 001, the front casing 001 and the rear casing 005 are fastened on a plane a-a passing through the water outlet and connected together by bolts 009, the ceramic lining includes 12 curved plates 003 disposed on the axial side of the wear-resistant pump body and having different shapes and spliced in sequence, and further includes a fan-shaped front annular plate 0041 disposed on the feed inlet side of the wear-resistant pump body and a rear annular plate 0042 disposed on the other side, and the front annular plate and the rear annular plate are respectively spliced by 6 fan-shaped plates having the same shape; FIG. 3 is a schematic view of a split ring back, in which one of the curved plates is on the axisThe projection angle α is 60 degrees (the connection line of any two points of the curved plate in the axial projection and the axial center point forms an included angle, wherein the largest included angle is the projection angle α of the curved plate in the axial direction), the contour lines of the adjacent curved plates (003) are matched with each other, the inner contour of the spliced curved plates (003) is matched with the outer contour of the front curved plate (0041) or the rear curved plate (0041), the curved plates 003, the front ring 0041 and the rear ring plate 0042 are made of reaction sintering silicon carbide, and the area of the single curved plate is 0.08-0.12m²Between ceramic lining and metal casing 001 or 005, still be provided with buffering wearing layer 002, the principal ingredients of buffering wearing layer 002 include silicon carbide granule and phenolic resin, preceding shell 001 and the curved plate 003 of installing in preceding shell 001, preceding annular plate 0041 is glued into a whole that can not the split by the resin in buffering wearing layer 002, be provided with back inside lining metal framework 006 on the buffering wearing layer 002 in the back shell, curved plate 003 in the back shell 005, back annular plate 0042 and back inside lining metal framework 006 are glued into an overall structure by the resin in buffering wearing layer 002, this whole can be followed the split on the back shell 005, between back inside lining metal framework 006 and the back shell, be provided with the space 007 of installation pressure reducing cover or mechanical seal box.

Example 2

As shown in fig. 4, embodiment 2 of the present invention is a perspective view of a large wear-resistant pump body after splicing curved plates, which includes 40 curved plates 003 of silicon nitride and silicon carbide, wherein the working surface area of a single curved plate is 0.1 to 0.15 square meter, the angle of axial projection of the single curved plate is 15 to 20 degrees, and the inner contour of all the curved plates 003 after splicing is two circles.

Example 3

Embodiment 3 of the present invention is a middle-sized wear-resistant pump body, and is a curved plate 003 shown in fig. 5, wherein the curved plate 003 is provided with a plane 0032 coinciding with the plane a-a and a lip 0031 extending outward from the plane a-a to enhance the wear resistance of the curved plate, and the area of the curved plate is 0.13m²And an axial projection angle α of 62.

Example 4

As shown in FIGS. 6, 7 and 8, the present invention is embodiedEmbodiment 4 is a wear-resistant pump body of a small-sized pump, which comprises a volute and a rear pump cover, the volute and the rear pump cover are matched through a hole/shaft and connected through a rear pump cover bolt 016, the volute comprises a front shell 001, a rear shell 005, a curved plate 003, a front annular plate 0041, a buffering wear-resistant layer 002 on the volute side, and the front shell 001, the rear shell 005, the curved plate 003, the front annular plate 0041 and the buffering wear-resistant layer 002 on the volute side are bonded into a non-detachable whole by resin in the buffering wear-resistant layer; the rear pump cover comprises a rear pump cover framework 010, a rear annular plate 0042 and a wear-resistant buffer layer 002 on the pump cover, and the rear pump cover framework 010, the rear annular plate 0042 and the wear-resistant buffer layer 002 on the pump cover are bonded into an integral body which can not be detached by resin in a buffer wear-resistant layer; the working surface of the curved plate 003 has an area of 0.08-0.12m²The angle of the axial projection of the curved plate 003 is 100 degrees to 150 degrees, the front annular plate 0041 and the rear annular plate 0042 are all integral circular rings, a plurality of small ceramic plates 011 are arranged on the working surface of the feed inlet 008 of the pump, the length × of the small ceramic plates, the width × of the small ceramic plates and the height of the small ceramic plates are 20mm × 20mm, × 6mm, and the area of the working surface of the small ceramic plates is 0.0004m²1/5, which is smaller than the working surface area of the curved plate 003; the small ceramic plates are made of alumina ceramic, and the parts are relatively light in abrasion, so that the service life close to that of other parts can be obtained even if the small ceramic plates are adopted, and the types of the ceramic plates and the number of the dies can be reduced.

Example 5

Fig. 9 is a cross-sectional view of embodiment 5 of the present invention, where the wear-resistant pump body is composed of a volute, a rear pump cover, and a front pump cover, where the rear pump cover includes a rear pump cover skeleton 010, a rear annular plate 0042, and a buffer wear-resistant layer 002 disposed in the rear pump cover; the rear pump cover framework 010, the rear annular plate 0042 and the buffering wear-resistant layer 002 are bonded into an integral body which cannot be disassembled by the adhesive in the buffering wear-resistant layer 002; the front pump cover comprises a front pump cover framework 015, a front annular plate 0041 and a buffering wear-resistant layer 002; the front pump cover framework 015, the front annular plate 0041 and the buffering wear-resistant layer 002 are bonded into an integral body which cannot be detached by resin in the buffering wear-resistant layer 002; the volute comprises a front shell 001, a rear shell 005, a curved plate 003 and a buffering wear-resistant layer 002 arranged in the volute; the shell 001, the rear shell 005, the curved plate 003 and the buffering wear-resistant layer 002 arranged in the volute are bonded into an integral body which can not be disassembled by the adhesive in the buffering wear-resistant layer; the volute and the rear pump cover are matched through a hole/shaft, and are connected through a rear pump cover bolt 016; the scroll and the front pump cover are matched through a hole/shaft, and the scroll and the front pump cover are connected through a front pump cover bolt 017.

The invention also provides a manufacturing method of the wear-resistant pump body, which comprises the following steps:

1) making a ceramic lining model of the sheath;

2) cutting the ceramic lining model into curved plate models with designed quantity;

3) manufacturing a front annular plate model and a rear annular plate model;

4) copying a casting mold by using the cut curved plate model, the front annular plate model and the rear annular plate model;

5) injecting prepared slurry such as slurry into a casting mold;

6) demolding and drying;

7) putting the dried blank into a sintering furnace for sintering;

8) placing the inner die of the front pump body on a die positioning plate;

9) sequentially placing the curved ceramic plates on corresponding parts of the inner mold of the front pump body and placing the front annular plate;

10) placing the front shell on a mould positioning plate;

11) injecting a mixture of wear-resistant particles and a binder into a space between the front shell and the ceramic lining, and exhausting air;

12) hardening the adhesive according to the hardening condition of the adhesive, wherein the adhesive can be resin;

13) removing the mould;

14) the rear pump body is manufactured according to the same method and is matched and connected with the front pump body through bolts.

As shown in fig. 10, when a front mold 012 is placed on a mold positioner 013, a front ring plate 0041 is placed at a corresponding position of the front mold 012, and a curved plate 003 is sequentially placed at a corresponding position, the front ring plate 0041 and the curved plate 003 are bonded to the front mold 012 using a temporary adhesive, and a front housing 001 is positioned, a casting space 014 is formed between a ceramic liner and the front housing 001, a mixture of wear-resistant particles and a resin is injected into the casting space 014 as indicated by an arrow, air is discharged, and the mixture is cured according to the curing condition of the adhesive, thereby forming a cushioning wear-resistant layer. And (5) after the mould is disassembled, the front pump body is manufactured.

It will be apparent to those skilled in the art that various other changes and modifications may be made in the above-described embodiments and concepts and all such changes and modifications are intended to be within the scope of the appended claims.

Claims (10)

1. A wear-resisting pump body comprises a shell and a lining arranged on the inner side of the shell, wherein a water inlet (008) is formed in one side of the shell, an A-A plane and a water outlet are formed in the middle of the shell, the shell comprises a front shell (001) and a rear shell (005) which are detachably connected along the A-A plane, and the wear-resisting pump body is characterized in that the lining comprises a plurality of curved plates (003) which can be sequentially spliced, and the lining further comprises a front annular plate (0041) arranged on one side close to the water inlet (008) and a rear annular plate (0042) arranged on the other side; and a buffering wear-resistant layer (002) is arranged between the outer shell and the inner lining.

2. A wear-resistant pump body according to claim 1, wherein the curved plate (003), the front annular plate (0041) and the rear annular plate (0042) are made of silicon carbide and/or silicon nitride, the buffer wear-resistant layer (002) comprises wear-resistant particles and a binder, and the wear-resistant particles are one or more of silicon carbide, aluminum oxide, silicon nitride, garnet and zirconia.

3. A wear-resistant pump body according to claim 1 or 2, wherein the number of the curved plates (003) is 3 to 40, the projection angle α of the curved plates (003) in the axial direction is 15 to 150 °, and the area of the working surface of the curved plates (003) is 0.02 to 0.2m²。

4. A wear-resistant pump body according to claim 3, characterized in that the contour lines of the joints between adjacent curved plates (003) coincide with each other, and the inner contour formed by successively joining all the curved plates (003) coincides with the outer contour of the front annular plate (0041) and/or the rear annular plate (0042); the front annular plate (0041) and the rear annular plate (0042) are both in an integral annular shape or in an annular shape formed by splicing 2-16 sectors.

5. A wear pump body according to claim 4, characterized in that said curved plate (003) has a flat surface (0032) for splicing with another curved plate (003) arranged symmetrically about the A-A plane and a lip (0031) extending towards the outside along the A-A plane, said flat surface (0032) coinciding with or being parallel to the A-A plane.

6. A wear-resistant pump body according to claim 1, 2, 4 or 5, characterized by comprising a front pump body and a rear pump body, between which a seal (018) is interposed; the front pump body comprises a front shell (001), a curved plate (003), a front annular plate (0041) and a buffering wear-resistant layer (002); the rear pump body comprises a detachable rear shell (005) and a rear lining, the rear lining comprises a curved plate (003), a rear annular plate (0042) and a buffering wear-resistant layer (002), and the rear lining framework (006) is embedded into the buffering wear-resistant layer (002); and a space (007) for placing a pressure reducing cover or a mechanical seal box is reserved between the rear lining framework (006) and the rear shell (005).

7. A wear-resistant pump body according to claim 1, 2, 4 or 5, characterized by comprising a volute and a rear pump cover engaged through the hole/shaft; the volute comprises a front shell (001), a rear shell (005), a curved plate (003), a front annular plate (0041) and a buffering wear-resistant layer (002) arranged on the volute side; the rear pump cover comprises a rear pump cover framework (010), a rear annular plate (0042) and a wear-resistant buffer layer (002) arranged on the rear pump cover.

8. The abrasion-resistant pump body according to claim 7, wherein the inner side wall of the water inlet (008) is provided with a plurality of small ceramic plates (011), and the working surface area of each small ceramic plate (011) is smaller than 1/5 of the area of each single curved plate (003).

9. A wear-resistant pump body according to claim 1, 2, 4 or 5, characterized by comprising a volute, a rear pump cover and a front pump cover, wherein the rear pump cover comprises a rear pump cover framework (010), a rear annular plate (0042) and a buffer wear-resistant layer (002) arranged on the rear pump cover; the front pump cover comprises a front pump cover framework (0015), a front annular plate (0041) and a buffering wear-resistant layer (002) arranged on the front pump cover; the volute comprises a front shell (001), a rear shell (005), a curved plate (003) and a buffering wear-resistant layer (002) arranged in the volute; the scroll and the rear pump cover and the scroll and the front pump cover are fixedly connected through hole/shaft matching respectively.

10. A method of manufacturing a wear resistant pump body, comprising the steps of:

1) making a ceramic lining model of the sheath;

2) cutting the ceramic lining model into curved plate models with designed quantity;

3) manufacturing a front annular plate model and a rear annular plate model;

4) copying a casting mold by using the cut curved plate model, the front annular plate model and the rear annular plate model;

5) injecting the prepared slurry into a casting mold;

6) demolding and drying;

7) putting the dried blank into a sintering furnace for sintering;

8) placing the inner die of the front pump body on a die positioning plate;

9) sequentially placing the curved ceramic plates on corresponding parts of the inner mold of the front pump body and placing the front annular plate;

10) placing the front shell on a mould positioning plate;

11) injecting a mixture of wear-resistant particles and a binder into a space between the front shell and the ceramic lining, and exhausting air;

12) hardening the adhesive according to the hardening condition of the adhesive;

13) removing the mould;

14) the rear pump body is manufactured according to the same method and is matched and connected with the front pump body through bolts.

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