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, comprising a casing and an inner lining arranged on the inner side of the casing, the casing is provided with a water inlet on one side, and the casing is provided with an A-A plane and a water outlet , the casing includes a front casing and a rear casing that are detachably connected along the A-A plane, the inner lining includes a plurality of curved panels that can be assembled in sequence, and the inner lining also includes a side close to the water inlet. The front annular plate and the rear annular plate arranged on the other side; a buffer wear-resistant layer is also arranged between the outer shell and the inner lining. The advantage is that the present invention can significantly reduce the manufacturing cost of the wear-resistant pump, improve the wear-resistant pump body's resistance to coarse particle erosion, and prolong the The life of the pump body is improved, the reliability of the pump body is improved, and it is easy to achieve large-scale.

Description

A kind of wear-resistant pump body and its manufacturing method

technical field

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

Background technique

In industries such as mineral processing and smelting, centrifugal pumps are often used to transport some abrasive solid-liquid two-phase flows. At this time, wear-resistant pumps are often used. The flow parts of the wear-resistant pump are seriously worn, and the wear-resistant pump body is one of the most seriously worn parts. In order to improve the life of the wear-resistant pump, the pump body must be made of wear-resistant materials. The most commonly used wear-resistant materials are wear-resistant Alloy and rubber, but the performance of these two wear-resistant materials often cannot meet the requirements of many working conditions.

In recent years, some technologies of using ceramic materials to manufacture wear-resistant pump bodies have been disclosed, such as CN108425850A. This technology uses a metal shell to coat a silicon carbide ceramic volute, and fills resin between the ceramic volute and the metal shell. to secure the volute. The advantages of this technology are simple structure, high reliability and good wear resistance; the disadvantage is that the manufacture of ceramic volutes is difficult and the cost is high. During the process, the ceramic volute is easily deformed or cracked. At the same time, since the volute is a hollow structure, it takes up a large furnace space during the sintering process, which will significantly increase the sintering cost. At the same time, due to the process characteristics of ceramic parts, the yield of large-scale ceramic parts is very low when sintering, so this technology is difficult in cost and technology when manufacturing large-scale pump bodies. Another technology such as CN106837875A, as shown in Figure 11, this technology is to set a ceramic layer 3 in the metal shell 1, and set a wear-resistant layer 2 composed of wear-resistant particles and resin between the ceramic layer 3 and the metal shell. , the ceramic layer 3 is composed of a large number of small ceramic pieces, similar to a mosaic structure, so only a small ceramic piece of a small specification or even one specification can be assembled to form a ceramic lining layer, so the manufacturing process of the ceramic piece It is relatively simple and does not require a lot of molds, but this technology also has obvious shortcomings in actual use, mainly due to the small size of the ceramic sheets, and there are a lot of uneven seams between the ceramic sheets. The coarse particles (generally refers to particles with a particle size of 1-10mm) have a greater impact on the seam, which leads to a great decrease in the resistance of the lining to the erosion of coarse particles, especially in the joint of the front pump body and the rear pump body. On the plane, because the ceramic layer between the front and rear pumps is prone to dislocation during construction and assembly, the small ceramic sheets in these parts are easily worn by the coarse particles in the medium due to their small difference in mass (weight) and particles in the medium. .

To sum up, the wear-resistant pump body lining of the prior art has the problems of difficult manufacturing process, high manufacturing cost or short service life, high use cost, and difficulty in large-scale.

SUMMARY OF THE INVENTION

In order to solve the above problems existing in the prior art, the present invention aims to provide a wear-resistant pump body. The invention overcomes the difficulty of forming the inner lining of the pump body. Due to the excessively large external dimensions, the sintering furnace space is large, the yield is low, and the manufacturing cost is high. The panel can greatly reduce the difficulty of forming and improve the yield of sintering.

The invention also provides a manufacturing method of the wear-resistant pump body. The invention can significantly reduce the manufacturing cost of the wear-resistant pump, improve the coarse particle erosion resistance of the wear-resistant pump body, prolong the life of the pump body, and improve the The reliability of the pump body is easy to achieve large-scale.

A wear-resistant pump body according to the present invention comprises a hollow volute-shaped outer casing and an inner lining arranged on the inner side of the outer casing, the outer casing is provided with a water inlet on one side, and the outer casing is provided with an A-A plane and an outlet The water inlet, the outer casing includes a front outer casing and a rear outer casing that are detachably connected along the A-A plane, the inner lining includes a plurality of curved panels that can be assembled in sequence, and the inner lining also includes a side close to the water inlet. A front annular plate and a rear annular plate arranged on the other side; a buffer and wear-resistant layer is also arranged between the outer shell and the inner lining.

Preferably, the material of the curved plate, the front annular plate and the rear annular plate is silicon carbide and/or silicon nitride, and the components of the buffer and wear-resistant layer include wear-resistant particles and adhesives. The particles are a combination of one or more of silicon carbide, alumina, 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°, and the area of the working surface of the curved plates is 0.02-0.2 m ² .

Preferably, the contour lines of the spliced parts between the adjacent curved panels are consistent with each other, and the inner contours formed by successively splicing all the curved panels are consistent with the outer contours of the front annular plate and/or the rear annular plate; the front annular plate and the rear annular plate are both an integral ring or a ring formed by splicing 2 to 16 sectors.

Preferably, the curved plate is provided with a plane for splicing with another curved plate symmetrically arranged on the A-A plane and a lip extending outward along the A-A plane, the plane being coincident with or parallel to the A-A plane .

Preferably, it includes 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 includes a front shell, a curved plate, a front annular plate and a buffer wear-resistant layer ; The rear pump body includes a detachable rear shell and a rear inner lining, the rear inner lining includes a curved plate, a rear annular plate and a buffer wear-resistant layer, and also includes a rear lining embedded in the buffer wear-resistant layer A skeleton; a space for placing a decompression cover or a mechanical sealing box is left between the rear inner lining skeleton and the rear shell.

Preferably, it includes a volute casing and a rear pump cover that are matched through holes/shafts; the volute casing includes a front casing, a rear casing, a curved plate, a front annular plate and a buffer and wear-resistant layer provided on the side of the volute casing; the The rear pump cover includes a rear pump cover skeleton, a rear annular plate and a wear-resistant buffer layer arranged on the rear pump cover.

Preferably, several small ceramic sheets are arranged on the inner side wall of the water inlet, and the working surface area of a single small ceramic sheet is less than 1/5 of the area of a single curved panel.

Preferably, it includes a volute, a rear pump cover and a front pump cover, the rear pump cover includes a rear pump cover frame, a rear annular plate and a buffer wear-resistant layer provided on the rear pump cover; the front pump cover includes The front pump cover skeleton, the front annular plate and the buffer wear-resistant layer arranged on the front pump cover; the volute includes a front casing, a rear casing, a curved plate and a buffer wear-resistant layer arranged in the volute; the The volute casing and the rear pump cover and between the volute casing and the front pump cover are respectively fixedly connected through holes/shafts.

The manufacturing method of a wear-resistant pump body according to the present invention is characterized in that, comprising the following steps:

1) Make a ceramic lined model of the sheath;

2) Cut the ceramic lining model into the designed number of curved panel models;

3) Make the front annular plate model and the rear annular plate model;

4) Using the cut curved plate model, the front annular plate model and the rear annular plate model to remake the casting mold;

5) inject the prepared slurry into the casting mold;

6) demoulding and drying;

7) Put the dried blank into the sintering furnace for sintering;

8) Place the inner mold of the front pump on the mold positioning plate;

9) Place the curved ceramic plate on the corresponding part of the inner mold of the front pump in turn, and place the front annular plate;

10) Place the front shell on the mold positioning plate;

11) Inject the mixture of wear-resistant particles and adhesive into the space of the front shell and the ceramic lining, and discharge the air;

12) Hardening the adhesive according to the hardening conditions of the adhesive;

13) Remove the mold;

14) Make the rear pump body in the same way, and connect it with the front pump body through bolts.

beneficial effect

Compared with the prior art, the advantages of the wear-resistant pump body of the present invention are:

1. Overcoming the difficulty in forming the overall ceramic lining similar to the prior art CN108425850A, and the shortcomings of large furnace space, low yield and high manufacturing cost during sintering due to excessive external dimensions, the lining is divided into areas and shapes suitable for It can greatly reduce the difficulty of forming and improve the yield of sintering. Since the projection angle α of the curved plate in the axial direction is less than 150°, the shape is similar to a tile, and it can be stacked like a tile during sintering. It can occupy a much smaller furnace space (that is, improve the utilization rate of unit space), thereby reducing the cost of firing; at the same time, when the area of the working surface of the curved plate (the surface in contact with the fluid) is less ^than 0.2m2 The deformation is small, which can improve the degree of fit when the curved panels are spliced, and reduce the dislocation of the curved panels at the joints. Another advantage of the working surface area of the curved panels is less ^than 0.2m2. When hardening, the volume tends to shrink, but the size of the ceramic does not change during this process. Therefore, the ceramic plate with a large area is prone to cracks or falls off the buffer wear layer during the process of the adhesive hardening and shrinkage. ^The area of the curved plate is controlled within 0.2m2, which can effectively prevent the ceramic plate from cracking or falling off.

2. Reaction sintered silicon carbide and silicon nitride combined with silicon carbide have good wear resistance, and the best forming method of these two kinds of ceramics is the casting forming process. The area of the curved plate is too large or too small, which will lead to difficulty in forming. When the area is too large, it is easy to produce waste during forming, and the yield is low. If the area is too small, it will significantly increase the forming workload and increase the production cost. When the working surface area of the curved panel is between ^0.02-0.2m The yield and forming cost are both at a good level.

3. Compared with the prior art similar to CN106837875A, which uses a large number of ceramic sheets with the same shape and small working area to assemble a ceramic layer, the present invention has the following advantages. When the number of curved panels is less than 40, the projection of the curved panels in the axial direction When the angle is greater than 15°, and the working surface area of the curved panel is greater than 0.02m2, the following results will occur: ^1. The number and total length of seams are greatly reduced, and the working surface is much smoother than that, which is conducive to reducing fluid resistance and improving pump efficiency. 2. Due to the significant increase in the volume of the ceramic plate, its mass (weight) is much higher than the coarse particles of 1-10mm in the medium, so it has a much higher resistance to the impact damage of such coarse particles, which can greatly extend the pump body. Third, the ceramic plate is easy to be assembled. After placing the ring plate with a simple shape, the numbered curved plate is placed in sequence, which not only reduces the workload of assembly, but also the size of the seam is much smaller.

4. Since the shapes of the curved panels are different, in order to reduce the types of molds and the difficulty of splicing, the types of curved panels should be reduced as much as possible. The working surface area of the curved panels should not exceed 0.2m ² , and the axial projection angle should not exceed Under the premise of 150°, the fewer the number of curved plates, the lower the manufacturing cost. Therefore, for large pump bodies, the number of curved plates should not exceed 40, and for small pump bodies, the number of curved plates should not be less than 3; If the quantity is selected within this range, the pump body can have lower manufacturing cost and higher service life.

5. The contour lines of adjacent curved panels at the splicing place are consistent with each other, and the inner contour of all the curved panels after splicing is consistent with the outer contour of the front annular plate or the rear annular plate, which can ensure that the splicing gap of the ceramic lining is narrow, thereby preventing thickening. The particles scour the wear-resistant particles in the gap and prolong the life of the wear-resistant pump body.

6. The front annular plate or the rear annular plate located on both sides of the pump body is preferably a regular annular or conical annular plate. For small pumps, the annular plate can be composed of a circular or conical annular ceramic plate. For large pumps, the annular plate can be assembled from 2-16 fan-shaped plates with the same shape, so that the ceramic parts have a reasonable area and improve its craftsmanship.

7. There are three purposes of setting the buffer wear layer on the outside of the ceramic lining. One is that the resin of the buffer wear layer can firmly fix the ceramic plate and absorb the impact energy of the ceramic plate, which is beneficial to prevent the ceramic plate from being impacted. The second is that the wear-resistant particles in the buffer wear-resistant layer have a good ability to resist the erosion of fine particles, and the splicing seam between the ceramic plates will be filled with a mixture of wear-resistant particles and resin during the processing of the pump body. Since the width of the seam can be controlled at about 2mm, particles larger than 2mm will not be washed into the seam, so the wear-resistant particles in the seam will be protected by the ceramic plate and have a long life. The third is the buffer The wear-resistant layer itself has good wear resistance. When the ceramic is worn or broken or falls off for some reason, the pump can still work for a period of time, thereby prolonging the life of the pump.

8. The metal casing includes a front casing and a rear casing. The front casing and the rear casing are buckled on a plane A-A passing through the water outlet and connected together by bolts. This structure can solve the installation and removal of the mold during the manufacturing process. Placement and positioning of curved panels during manufacturing.

9. Set the curved plate to a sealing surface that is coincident with or parallel to the A-A plane; it can solve the sealing and wear resistance problems of the A-A plane after the front pump body and the rear pump body are manufactured respectively, so that after the front pump body and the rear pump body are combined, the front The gap of the seam between the curved panels of the pump body and the rear pump body is small, so that the outside of the seam can be prevented from being rapidly worn.

10. Due to technological reasons, after the front pump body and the rear pump body are assembled, the curved plate of the A-A plane is prone to dislocation at the joints. This dislocation reduces the wear resistance of the joints of the A-A plane. Setting the lip that extends and protrudes outward along the A-A sealing face is equivalent to thickening the thickness of the ceramic sheet at this position, which can improve the wear resistance of this position and prolong the life of the pump body without increasing the cost.

11. The wear-resistant pump body is composed of a front pump body and a rear pump body. Between the front pump body and the rear pump body, a sealing gasket is arranged; the front pump body is composed of a front shell and a front lining It is an inseparable whole, the front inner lining includes a ceramic inner lining and a buffer wear-resistant layer; the rear pump body is composed of a detachable rear shell and a rear inner lining, and the rear inner lining includes a ceramic inner lining and a buffer wear-resistant layer. The grinding layer also includes a rear inner lining frame embedded in the buffer wear-resistant layer. Between the rear inner lining frame and the rear outer casing, there is a space for placing a decompression cover. This structure can solve the problem of decompression when the auxiliary impeller is used for sealing. the placement of the cover;

12. The wear-resistant pump body volute is composed of the rear pump cover, which are matched by holes/shafts. The volute includes the front casing, the rear casing, the curved plate, the front annular plate, the buffer wear-resistant layer on the volute side, the front casing, The rear casing, the curved plate, the front annular plate, and the buffer wear-resistant layer on the volute side are bonded into a whole by the adhesive. The rear pump cover includes the rear pump cover skeleton, the rear annular plate, and the buffer wear-resistant layer on the rear pump cover. , the pump cover skeleton, the rear annular plate, and the buffer wear-resistant layer on the rear pump cover are bonded into an inseparable whole by the adhesive. This structure can solve the problems of the sealing reliability and life of the A-A plane, improve the The strength of the volute is convenient for disassembly and assembly of the pump.

13. The wear-resistant pump body is composed of a volute, a rear pump cover and a front pump cover. The rear pump cover includes a rear pump cover skeleton, a rear annular plate, and a buffer wear-resistant layer arranged in the rear pump cover; the rear pump cover The frame, the rear annular plate, and the buffer wear-resistant layer arranged in the rear pump cover are bonded by the adhesive in the buffer wear-resistant layer to form an inseparable whole; the front pump cover includes a front pump cover frame, a front pump cover The annular plate, the buffer wear-resistant layer on the front pump cover, the front pump cover skeleton, the front annular plate, and the buffer wear-resistant layer on the front pump cover are bonded by the adhesive in the buffer wear-resistant layer. The whole of the split; the volute includes a front casing, a rear casing, a curved plate, and a buffer wear-resistant layer arranged in the volute. The front casing, the rear casing, the curved plate, and the buffer and wear-resistant layer arranged in the volute are The adhesive is bonded to form an inseparable whole; the volute and the rear pump cover are fitted through holes/shafts, and the two are connected by the rear pump cover bolts; the volute and the front pump cover are connected by The hole/shaft is matched, and the two are connected by the front pump cover bolt. This structure can solve the sealing problem of the A_A plane, and improve the strength of the volute, which is convenient for the disassembly and assembly of the pump. During maintenance, you can choose to replace the spare parts according to the wear condition. Reduce maintenance costs.

14. In the local position where the flow surface wear is not serious, such as the position of the feed pipe or the position of the discharge pipe, the technology of splicing small ceramic sheets similar to CN106837875A can still be used to ensure that the life of the wear-resistant pump body will not be shortened. Reduce the types and sizes of curved panels.

15. In summary, the present invention can significantly reduce the manufacturing cost of the wear-resistant pump and improve the wear-resistant pump body's resistance to coarse particle erosion by selecting a reasonable ceramic lining splicing method and a reasonable shape and external dimension of the curved plate. , prolong the life of the pump body, improve the reliability of the pump body, and it is easy to achieve large-scale.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

1 is a cross-sectional view of Embodiment 1 of the present invention;

2 is a schematic structural diagram of the curved panel and the annular panel in Embodiment 1 of the present invention after being assembled;

3 is a schematic structural diagram of the curved panels of the rear pump body after being assembled in Embodiment 1 of the present invention;

4 is a schematic structural diagram of the curved panels in Embodiment 2 of the present invention after they are assembled;

5 is a schematic structural diagram of a curved panel in Embodiment 3 of the present invention;

6 is a cross-sectional view of Embodiment 4 of the present invention;

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

8 is a schematic structural diagram of the curved panel and the annular panel after being assembled in Embodiment 4 of the present invention;

9 is a cross-sectional view of Embodiment 5 of the present invention;

Fig. 10 is the schematic diagram of front pump body manufacture of the present invention;

FIG. 11 is a cross-sectional view of the structure of the prior art.

Detailed ways

Example 1

As shown in Figures 1, 2, and 3, Embodiment 1 of the present invention is a wear-resistant pump body of a medium-sized pump. The wear-resistant pump body includes a metal shell and a ceramic lining, wherein the metal shell includes a front shell 001 and a rear shell 005. The water inlet 008 is arranged on the front casing 001. The front casing 001 and the rear casing 005 are buckled on a plane AA passing through the water outlet and connected together by bolts 009. The ceramic lining includes 12 pieces arranged on the axial side of the wear-resistant pump body. Curved plates 003 of different shapes and assembled in sequence also include a fan-shaped front annular plate 0041 arranged on the feed port side of the wear-resistant pump body and a rear annular plate 0042 arranged on the other side. The front annular plate and the rear annular plate are respectively It is formed by assembling 6 fan-shaped plates with the same shape; Figure 3 is a schematic diagram of the rear ring assembling, and the projection angle α of one of the curved plates in the figure is 60° (the curved plate is in the axial projection. The line connecting any two points of , and the pivot point will form an included angle, of which the largest included angle is the projection angle α of the curved panel in the axial direction; the contour lines between adjacent curved panels (003) match each other, all The inner contour of the curved plate (003) after splicing is consistent with the outer contour of the front curved plate (0041) or the rear curved plate (0041); the material of the curved plate 003, the front annular plate 0041 and the rear annular plate 0042 The area of the block curved plate is between 0.08-0.12m ² , and between the ceramic lining and the metal shell 001 or 005, a buffer wear-resistant layer 002 is also provided, and the main component of the buffer wear-resistant layer 002 includes silicon carbide particles. and phenolic resin, the front shell 001 and the curved plate 003 and the front annular plate 0041 installed in the front shell 001 are bonded into an inseparable whole by the resin in the buffer wear-resistant layer 002, and the buffer wear-resistant layer in the rear shell The rear lining metal frame 006 is provided on the 002, and the curved plate 003, the rear annular plate 0042 and the rear lining metal frame 006 in the rear shell 005 are bonded by the resin in the buffer wear-resistant layer 002 to form an integral structure, which can be It is separated from the rear casing 005, and between the rear lining metal frame 006 and the rear casing, there is a space 007 for installing a decompression cover or a mechanical sealing box.

Example 2

As shown in FIG. 4 , Embodiment 2 of the present invention is a perspective view of the curved panels of a large wear-resistant pump body after being assembled, including 40 curved panels 003 of silicon nitride combined with silicon carbide. The working surface area of a single curved panel is At 0.1-0.15 square meters, the angle of projection of a single curved panel in the axial direction is 15°-20°, and the inner contours of all the curved panels 003 are two circles after splicing.

Example 3

Embodiment 3 of the present invention is a medium-sized wear-resistant pump body, and FIG. 5 shows a curved panel 003. The curved panel 003 is provided with a plane 0032 that coincides with the AA plane, and is also provided with a plane 0032 along the AA plane to the outside Extend the protruding lip 0031 to enhance the wear resistance there, the area of the curved panel is 0.13m ² , and the projected angle α in the axial direction is 62°.

Example 4

As shown in Figures 6, 7, and 8, Embodiment 4 of the present invention is a small pump wear-resistant pump body, which consists of a volute shell and a rear pump cover, which are matched through holes/shafts, and pass through the rear pump cover bolts 016 Connect, the volute includes front casing 001, rear casing 005, curved plate 003, front annular plate 0041, buffer wear-resistant layer 002 on the scroll side, front casing 001, rear casing 005, curved plate 003, front annular plate 0041, vortex The buffer wear-resistant layer 002 on the shell side is bonded by the resin in the buffer wear-resistant layer to form an inseparable whole; the rear pump cover includes the rear pump cover skeleton 010, the rear annular plate 0042, and the wear-resistant buffer layer on the pump cover 002, the rear pump cover skeleton 010, the rear annular plate 0042, and the wear-resistant buffer layer 002 on the pump cover are bonded to an inseparable whole by the resin in the buffer wear-resistant layer; the area of the working surface of the curved plate 003 is 0.08-0.12m ² , the projected angle of the curved plate 003 in the axial direction is 100°-150°, the front annular plate 0041 and the rear annular plate 0042 are both integral rings, and the working surface of the feed port 008 of the pump is provided with Several small ceramic pieces 011, the length×width×height of the small ceramic piece is 20mm×20mm×6mm, and the area of the working surface of the small ceramic piece is 0.0004m ² , which is less than 1/5 of the working surface area of the curved plate 003; The material is alumina ceramics. Since the parts are relatively lightly worn, even if a small ceramic piece is used, it can obtain a life similar to that of other parts, so the types of ceramic pieces and the number of molds can be reduced.

Example 5

9 is a cross-sectional view of Embodiment 5 of the present invention. The wear-resistant pump body is composed of a volute, a rear pump cover and a front pump cover. The rear pump cover includes a rear pump cover skeleton 010, a rear annular plate 0042, and a The inner buffer wear-resistant layer 002; the rear pump cover skeleton 010, the rear annular plate 0042, and the buffer wear-resistant layer 002 are bonded by the adhesive in the buffer wear-resistant layer 002 to form an inseparable whole; the front pump The cover includes the front pump cover frame 015, the front annular plate 0041, and the buffer wear-resistant layer 002; The volute includes a front casing 001, a rear casing 005, a curved plate 003, and a buffer and wear-resistant layer 002 arranged in the volute; the casing 001, the rear casing 005, the curved plate 003, the The buffer wear layer 002 is bonded by the adhesive in the buffer wear layer to form an inseparable whole; the volute and the rear pump cover are matched through holes/shafts, and the rear pump cover bolts 016 are used between them. Connection; the volute and the front pump cover are fitted with holes/shafts, and the two are connected by the front pump cover bolts 017.

The present invention also provides a method for manufacturing a wear-resistant pump body, comprising the following steps:

1) Make a ceramic lined model of the sheath;

2) Cut the ceramic lining model into the designed number of curved panel models;

3) Make the front annular plate model and the rear annular plate model;

4) Using the cut curved plate model, the front annular plate model and the rear annular plate model to remake the casting mold;

5) Inject the prepared slurry and other slurry into the casting mold;

6) demoulding and drying;

7) Put the dried blank into the sintering furnace for sintering;

8) Place the inner mold of the front pump on the mold positioning plate;

9) Place the curved ceramic plate on the corresponding part of the inner mold of the front pump in turn, and place the front annular plate;

10) Place the front shell on the mold positioning plate;

11) Inject the mixture of wear-resistant particles and adhesive into the space of the front shell and the ceramic lining, and discharge the air;

12) The adhesive is hardened according to the hardening conditions of the adhesive, and the adhesive can be resin;

13) Remove the mold;

14) Make the rear pump body in the same way, and connect it with the front pump body through bolts.

As shown in Fig. 10, place the front mold 012 on the mold positioner 013, place the front annular plate 0041 on the corresponding position of the front mold 012, and then place the curved plate 003 in the corresponding position in turn, in order to prevent the front annular plate 0041 from and When the curved plate 003 moves, a temporary adhesive can be used to bond the front annular plate 0041 and the curved plate 003 to the front mold 012, and then the front shell 001 is positioned to form a casting space between the ceramic lining and the front shell 001 014, inject the mixture of wear-resistant particles and resin into the pouring space 014 from the arrows, exhaust air, and cure according to the hardening conditions of the adhesive, so as to form a buffer wear-resistant layer. After removing the mold, the front pump body is made.

For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims (10)

1. A wear-resistant pump body, comprising an outer shell and an inner lining arranged on the inner side of the outer shell, a water inlet (008) is provided on one side of the outer shell, an A-A plane and a water outlet are provided in the middle of the outer shell, and the The casing comprises a front casing (001) and a rear casing (005) that are detachably connected along the A-A plane, characterized in that the inner lining includes a plurality of curved panels (003) that can be assembled in sequence, and the inner lining also includes 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; a buffer and wear-resistant layer (002) is also arranged between the outer casing and the inner lining . 2. The wear-resistant pump body according to claim 1, characterized in that, the material of the curved surface plate (003), the front annular plate (0041), and the rear annular plate (0042) is silicon carbide and/or nitrogen Silicon carbide, the components of the buffer wear-resistant layer (002) include 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 combination of species. 3. The wear-resistant pump body according to claim 1 or 2, wherein the number of the curved plates (003) is 3-40, and the projection angle of the curved plates (003) in the axial direction α is 15°˜150°, and the area of the working surface of the curved panel (003) is 0.02˜0.2 m ² . 4. A wear-resistant pump body according to claim 3, characterized in that the contour lines at the splicing places between adjacent curved panels (003) are matched with each other, and the inner contours formed by splicing all the curved panels (003) in turn and the outer contours of the front annular plate (0041) and/or the rear annular plate (0042) are matched to each other; the front annular plate (0041) and the rear annular plate (0042) are both an integral annular shape or are composed of 2 to 16 A circle formed by piecing together sectors. 5. A wear-resistant pump body according to claim 4, characterized in that the curved plate (003) is provided with a plane for splicing with another curved plate (003) symmetrically arranged on the A-A plane (0032) and a lip (0031) extending outward along the A-A plane, the plane (0032) being coincident with or parallel to the A-A plane. 6. a kind of wear-resistant pump body according to claim 1 or 2 or 4 or 5, is characterized in that, comprises front pump body and rear pump body, and is provided with sealing gasket between described front pump body and rear pump body (018); the front pump body includes a front casing (001), a curved plate (003), a front annular plate (0041) and a buffer wear-resistant layer (002); the rear pump body includes a detachable rear A shell (005) and a rear inner lining, the rear inner lining comprising a curved plate (003), a rear annular plate (0042) and a buffer wear-resistant layer (002), and a rear lining embedded in the buffer wear-resistant layer (002) An inner lining frame (006); a space (007) for placing a decompression cover or a mechanical sealing box is left between the rear inner lining frame (006) and the rear casing (005). 7. A wear-resistant pump body according to claim 1 or 2 or 4 or 5, characterized in that it comprises a volute and a rear pump cover matched by a hole/shaft; the volute comprises a front casing (001) , a rear casing (005), a curved plate (003), a front annular plate (0041) and a buffer wear-resistant layer (002) provided on the side of the volute; the rear pump cover includes a rear pump cover skeleton (010), a rear An annular plate (0042) and a wear-resistant buffer layer (002) provided on the rear pump cover. 8. The wear-resistant pump body according to claim 7, wherein a plurality of small ceramic pieces (011) are arranged on the inner side wall of the water inlet (008), and the work of a single small ceramic piece (011) The surface area is less than 1/5 of the area of a single curved panel (003). 9. A wear-resistant pump body according to claim 1 or 2 or 4 or 5, characterized in that it comprises a volute, a rear pump cover and a front pump cover, and the rear pump cover comprises a rear pump cover skeleton (010 ), a rear annular plate (0042) and a buffer wear-resistant layer (002) arranged on the rear pump cover; the front pump cover includes a front pump cover skeleton (0015), a front annular plate (0041) and a A buffer wear-resistant layer (002) on the cover; the volute includes a front casing (001), a rear casing (005), a curved plate (003) and a buffer wear-resistant layer (002) provided in the volute; The volute casing and the rear pump cover and between the volute casing and the front pump cover are fixedly connected through holes/shafts, respectively. 10. A manufacturing method of a wear-resistant pump body, characterized in that, comprising the following steps: 1) Make a ceramic lined model of the sheath; 2) Cut the ceramic lining model into the designed number of curved panel models; 3) Make the front annular plate model and the rear annular plate model; 4) Using the cut curved plate model, the front annular plate model and the rear annular plate model to remake the casting mold; 5) inject the prepared slurry into the casting mold; 6) demoulding and drying; 7) Put the dried blank into the sintering furnace for sintering; 8) Place the inner mold of the front pump on the mold positioning plate; 9) Place the curved ceramic plate on the corresponding part of the inner mold of the front pump in turn, and place the front annular plate; 10) Place the front shell on the mold positioning plate; 11) Inject the mixture of wear-resistant particles and adhesive into the space of the front shell and the ceramic lining, and discharge the air; 12) Hardening the adhesive according to the hardening conditions of the adhesive; 13) Remove the mold; 14) Make the rear pump body in the same way, and connect it with the front pump body through bolts.

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