Wear-resistant lining plate for dredge pump and manufacturing method of wear-resistant lining plate
By adopting a combined structure of the circular liner body and a detachable reinforcement plate on the mud pump lining, the problems of liner wear and material waste in the prior art are solved, and more efficient wear resistance and lower Maintenance cost.
Patent Information
- Application Number
- CN202411466394.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-21
- Publication Date
- 2025-01-03
AI Technical Summary
The front and rear linings of existing mud pumps are prone to reduce the working efficiency of the pump due to wear during use, and the overall casting cost is high and the yield is low. The split gap of the linings of the split casting is large and the overall flatness cannot be guaranteed, resulting in Intensified wear and waste of materials.
The circular lining body and the removable reinforcement plate structure are adopted. The flush installation of the lining plate is achieved through the combination of cast steel inserts and steps, and the wear resistance is improved through high chrome cast iron cast reinforcement plates. Only partial reinforcement plates need to be replaced. To extend service life.
It effectively reduces material waste, ensures the flatness and gap uniformity of the lining plate, significantly improves service life, simplifies the maintenance process, and reduces maintenance costs.
Smart Images
Figure CN119244556A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of dredging engineering, relates to a wear-resistant lining plate for a mud pump, and also relates to a manufacturing method of the wear-resistant lining plate. Background Art
[0002] In the dredging industry, the mud pump is the core component of the dredger, and its front and rear liners are important components of the mud pump. At present, the front and rear liners of the mud pump are fixed on the front and rear pump covers, mainly to seal and protect the pump body. When the pump is running, a small amount of mud, small gravel or coral reefs will leak from the gap, causing wear on the edge of the liner. As the gap continues to increase, the wear rate will also become faster and faster, which will lead to liner failure and the working efficiency of the pump will decrease accordingly.
[0003] In order to improve the service life of the front and rear liners of the mud pump, high-chromium cast iron is usually used for integral casting in China. However, the overall casting of high-chromium cast iron is expensive, difficult to cast, and has a low yield rate, and is also difficult to machine. During operation, if the liner is only severely worn at the edge, and other parts are almost intact, it is still necessary to stop the ship to replace the failed liner, otherwise it will cause damage to other parts such as the pump cover. Therefore, the service life of the front and rear liners not only affects the working efficiency of the mud pump, but also causes ineffective waste of raw materials. Some liners also use another liner casting method, namely the split casting method. Although this method solves the problem of the difficulty of integral casting, since the liner is only completed through the casting process, the matching gap between the liner splits is large. In addition, the liner split is directly fixed to the pump cover by bolts. First of all, the overall flatness of the liner cannot be guaranteed, which makes the gap between the liner and the impeller uneven after assembly, resulting in a large amount of silt, small gravel and coral reefs leaking from the gap between the impeller and the liner, and the liner wear is greater. At the same time, mud, small gravel and coral reefs will leak from the gaps between the liner parts to the pump cover, causing the pump cover to wear and cause greater losses. The bolt holes on the liner parts are also weak points for the liner parts, and there is a risk of being worn through by mud and sand, which will cause the liner parts to fall off and fail. The fallen liner parts will jam the impeller, causing the entire pump system to stop working. In view of the defects of the above-mentioned wear-resistant liner preparation method and structure, it is urgent to invent a new wear-resistant liner structure to improve this situation. Summary of the invention
[0004] The object of the present invention is to provide a wear-resistant lining for a mud pump, which solves the problems in the prior art that the integrally cast lining needs to be replaced as a whole when it fails, resulting in ineffective waste of raw materials, and the split-cast lining has a large fitting gap between the split parts and the lining splits are directly fixed to the pump cover by bolts, which makes it impossible to ensure the overall flatness of the lining.
[0005] Another object of the present invention is to provide a method for manufacturing a wear-resistant liner for a mud pump.
[0006] The technical solution adopted in the present invention is that a wear-resistant liner for a mud pump comprises a ring-shaped liner body, on which a plurality of groups of reinforcement plates are detachably fixed around the outer edge, the plurality of groups of reinforcement plates are formed around the outer edge of the liner body into a ring-shaped liner reinforcement structure, each group of reinforcement plates comprises a reinforcement outer expansion plate, a reinforcement middle plate and a reinforcement contraction plate which are detachably fixed in sequence around the outer edge of the liner body, the reinforcement outer expansion plate, the reinforcement middle plate and the reinforcement contraction plate are all arranged in a fan ring shape, the fan-shaped busbar of the reinforcement outer expansion plate expands outwardly from the side close to the liner body to the side away from the liner body along the center line of the fan ring, and the fan ring busbar of the reinforcement contraction plate contracts inwardly from the side close to the liner body to the side away from the liner body along the center line of the fan.
[0007] The present invention is also characterized in that: A step is provided on the lining body, and the reinforced outer expansion plate, the reinforced middle plate and the reinforced shrinkage plate are installed on one side of the lining body and a matching step that matches the step is provided. The lining body is matched with the reinforced outer expansion plate, the reinforced middle plate and the reinforced shrinkage plate through the step, and after matching, the outer edges of the reinforced outer expansion plate, the reinforced middle plate and the reinforced shrinkage plate are flush with the outer edge of the lining body.
[0008] A cast steel insert is pre-embedded on the step surface where the reinforced outer expansion plate and the lining plate body cooperate with each other, and a countersunk hole is processed on the inner edge of the lining plate body at a position corresponding to the step surface where the lining plate body and the reinforced outer expansion plate cooperate with each other. The reinforced outer expansion plate and the lining plate body are detachably fixed by screwing the hexagon socket bolts into the cast steel insert through the countersunk holes.
[0009] A plurality of threaded holes for connecting the pump cover are evenly arranged around the circumference of the lining plate body near the inner edge.
[0010] Taking the line connecting the two ends of the arc line of the fan ring of the enhanced external expansion plate close to the liner body and the center of the liner body as the reference line, the generatrix on both sides of the fan ring of the enhanced external expansion plate is offset from the side close to the liner body to the side away from the liner body in the direction away from the center line of the fan ring, and the angle between the generatrix and the reference line on the corresponding side is an acute angle; Taking the line connecting the two ends of the arc of the fan ring of the enhanced shrinkage plate close to the lining body and the center of the lining body as the baseline, the generatrix on both sides of the fan ring of the enhanced shrinkage plate is offset from the side close to the lining body to the side away from the lining body toward the direction close to the center line of the fan ring, and the angle with the baseline on the corresponding side is an acute angle.
[0011] The included angle between the generatrix of the enhanced outward expansion plate fan ring and the reference line on the corresponding side is α, and the included angle between the generatrix of the enhanced contraction plate fan ring and the reference line on the corresponding side is β, α=β.
[0012] The two sides of the reinforced middle plate are respectively adapted to the shapes of the reinforced contraction plate or the reinforced expansion plate on the corresponding side.
[0013] The liner body is cast from cast steel, and the reinforced outer expansion plate, reinforced middle plate and reinforced shrinkage plate are cast from high chromium cast iron.
[0014] Eight groups of reinforcing plates are detachably fixed around the outer edge of the lining body, that is, a group of reinforcing plates is arranged every 45 degrees around the outer edge of the lining body.
[0015] The manufacturing method of the wear-resistant lining plate for a mud pump is as follows: Casting the liner body, and processing countersunk holes and threaded holes for connecting the pump cover at corresponding positions on the liner body; Casting the reinforced outer expansion plate, the reinforced middle plate and the reinforced shrinkage plate according to the set angle and size, and pre-embedding the cast steel inlay when casting the reinforced outer expansion plate; Then the cast reinforced outer expansion plate, reinforced middle plate and reinforced shrinkage plate are installed on the liner body.
[0016] When installing the reinforced outer expansion plate, the reinforced middle plate and the reinforced shrinkage plate, the reinforced outer expansion plate of the first group of reinforcement plates is matched with the liner body through a step, and then the hexagon socket bolts are completely screwed into the countersunk holes and connected to the cast steel inserts through threads. The reinforced middle plate and the reinforced shrinkage plate are matched with the liner body through a step, and the reinforced middle plate and the reinforced shrinkage plate are also squeezed against the reinforced outer expansion plate through the matching edges; when installing the remaining seven groups of reinforcement plates, the reinforced middle plate and the reinforced shrinkage plate are installed first, and then the reinforced outer expansion plate is installed and fixed for squeezing. After all eight groups of reinforcement plates are pre-installed, the reinforcement plates are well fitted with the plane and step surfaces of the liner body, and the circumferential dimensions are consistent. Then all the hexagon socket bolts are tightened in turn, and then the liner body is fixed to the pump cover through the threaded holes according to the mud pump assembly requirements, and the assembly is completed.
[0017] The beneficial effects of the present invention are: (i) Compared with the traditional wear-resistant lining, the advantage of the partially reinforced wear-resistant lining provided by the present invention is that the lining body is cast from ordinary cast steel and has good impact resistance, while the reinforcement plate is cast from high-chromium cast iron with better wear resistance. When the reinforcement plate is severely worn, only the reinforcement plate of the corresponding group needs to be replaced, which effectively reduces the waste of raw materials.
[0018] (ii) Compared with the traditional wear-resistant lining, the advantage of the wear-resistant lining provided by the present invention is that the lining body and the reinforcement plate are matched through a step, so that the lining body and the outer edge of the reinforcement plate are flush after matching, which can ensure the flatness of the entire lining. After assembly, the clearance with the impeller is small and uniform, and it is not easy to wear during operation, thereby significantly improving the service life of the lining.
[0019] (III) Compared with the traditional wear-resistant lining, the wear-resistant lining provided by the present invention has the advantage that it is extremely easy to install and disassemble. When replacement is required, it is only necessary to loosen the hexagon socket bolts at the corresponding positions, pull out the group of reinforcement plates as a whole, and replace the worn reinforcement plates. It is easy to operate, saves maintenance time, and reduces the maintenance cost of the mud pump. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic structural diagram of a wear-resistant liner for a mud pump according to the present invention; Figure 2 It is a schematic diagram of the assembly structure of the reinforced outer expansion plate and the liner body in the wear-resistant liner for a mud pump of the present invention; Figure 3 It is a schematic diagram of the angle setting of the reinforced outward expansion plate and the reinforced contraction plate in the wear-resistant liner used for the mud pump in the present invention.
[0021] In the figure: 1- liner body, 1.1- countersunk hole, 1.2- threaded hole, 2- reinforcement plate, 2.1- reinforcement outer expansion plate, 2.1.1- cast steel inlay, 2-2. reinforcement middle plate, 2-3. reinforcement shrinkage plate, 3- hexagon socket bolt. DETAILED DESCRIPTION
[0022] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.
[0023] Example 1 The wear-resistant lining plate of the present invention is used for a mud pump, and its structure is as follows Figure 1 As shown, it includes a circular ring-shaped lining body 1, on which a plurality of groups of reinforcing plates 2 are detachably fixed around its outer edge, and the plurality of groups of reinforcing plates 2 form a circular ring-shaped lining reinforcement structure around the outer edge of the lining body 1, and each group of reinforcing plates 2 includes a reinforcing outer expansion plate 2.1, a reinforcing middle plate 2.2 and a reinforcing contraction plate 2.3 which are successively detachably fixed around the outer edge of the lining body 1, and the reinforcing outer expansion plate 2.1, the reinforcing middle plate 2.2 and the reinforcing contraction plate 2.3 are all arranged in a fan ring shape, and the fan-shaped busbar of the reinforcing outer expansion plate 2.1 expands outwardly from the side close to the lining body 1 to the side away from the lining body 1 along the center line of its fan ring, and the fan ring busbar of the reinforcing contraction plate 2.3 contracts inwardly from the side close to the lining body 1 to the side away from the lining body 1 along the center line of its fan shape.
[0024] The lining body 1 is provided with a step, and the reinforced outer expansion plate 2.1, the reinforced middle plate 2.2 and the reinforced contraction plate 2.3 are installed on the lining body 1. One side is provided with a matching step that matches with the step. Figure 2 As shown, the lining body 1 is matched with the reinforced outer expansion plate 2.1, the reinforced middle plate 2.2 and the reinforced shrinkage plate 2.3 through a step, and after matching, the outer edges of the reinforced outer expansion plate 2.1, the reinforced middle plate 2.2 and the reinforced shrinkage plate 2.3 are flush with the outer edge of the lining body 1.
[0025] like Figure 2 As shown, a cast steel insert 2.1.1 is pre-embedded on the step surface where the reinforced outward expansion plate 2.1 and the lining body 1 cooperate with each other, and a countersunk hole 1.1 is processed on the inner edge of the lining body 1 at the position of the step surface where the lining body 1 and the reinforced outward expansion plate 2.1 cooperate with each other. The reinforced outward expansion plate 2.1 and the lining body 1 are detachably fixed by screwing the hexagon socket bolt 3 into the cast steel insert 2.1.1 through the countersunk hole 1.1.
[0026] A plurality of threaded holes 1.2 for connecting the pump cover are evenly arranged around the circumference of the liner body 1 near the inner edge.
[0027] like Figure 3 As shown, with the line connecting the two ends of the arc line of the fan ring of the enhanced external expansion plate 2.1 close to the liner body 1 and the center of the liner body 1 as the reference line, the generatrix on both sides of the fan ring of the enhanced external expansion plate 2.1 is offset from the side close to the liner body 1 to the side away from the liner body 1 in the direction away from the center line of the fan ring, and the angle with the reference line on the corresponding side is an acute angle; Taking the line connecting the two ends of the arc line of the fan ring of the enhanced shrinkage plate 2.3 close to the lining body 1 and the center of the lining body 1 as the reference line, the generatrix on both sides of the fan ring of the enhanced shrinkage plate 2.3 is offset from the side close to the lining body 1 to the side away from the lining body 1 toward the direction close to the center line of its fan ring, and the angle with the reference line on the corresponding side is an acute angle.
[0028] The angle between the generatrix of the fan ring of the enhanced outward expansion plate 2.1 and the reference line of the corresponding side is α, and the angle between the generatrix of the fan ring of the enhanced contraction plate 2.3 and the reference line of the corresponding side is β, α=β.
[0029] The two sides of the reinforced middle plate 2.2 are respectively adapted to the shapes of the reinforced shrinkage plate 2.3 or the reinforced outward expansion plate 2.1 on the corresponding side, and the side of the reinforced shrinkage plate 2.3 and the reinforced outward expansion plate 2.1 away from the reinforced middle plate 2.2 of this group is respectively matched with the side of the reinforced outward expansion plate 2.1 and the reinforced shrinkage plate 2.3 of the adjacent group.
[0030] Eight groups of reinforcing plates 2 are detachably fixed around the outer edge of the lining body 1 , that is, a group of reinforcing plates 2 is arranged every 45° around the outer edge of the lining body 1 .
[0031] The lining plate body 1 is cast from cast steel, and the reinforced outer expansion plate 2.1, the reinforced middle plate 2.2 and the reinforced shrinkage plate 2.3 are cast from high chromium cast iron.
[0032] The present invention divides the reinforcement plate into 8 groups evenly, each group is composed of the reinforcement outer expansion plate 2.1, the reinforcement middle plate 2.2 and the reinforcement contraction plate 2.3, the reinforcement outer expansion plate 2.1, the reinforcement middle plate 2.2 and the reinforcement contraction plate 2.3 are mutually restrained and matched through the angle setting of the contact surface, so as to form a complete set of reinforcement plate assembly, and the threaded holes matched with the pump cover are not arranged on the liner body 1, which increases the wear-resistant area and prolongs the service life of the reinforcement plate. Among them, the reinforcement outer expansion plate 2.1 is connected to the liner body 1 by the hexagon socket bolt, and when the hexagon socket bolt is tightened, the reinforcement outer expansion plate 2.1 is tightly fitted with the liner body. The liner body 1 is matched with the reinforced outer expansion plate 2.1, the reinforced middle plate 2.2 and the reinforced contraction plate 2.3 through a step, and after matching, the outer edges of the reinforced outer expansion plate 2.1, the reinforced middle plate 2.2 and the reinforced contraction plate 2.3 are flush with the outer edge of the liner body 1. When the size is processed, it only needs to be processed according to the preset size and meet the required size margin to achieve the requirement that the entire liner meets the flatness ≤ 0.5mm. Therefore, after being assembled in the mud pump, it can ensure that the gap between the impeller and the wear-resistant liner is small and uniform. In addition, the threaded holes for fixing the liner and the pump cover are evenly distributed at the position close to the inner edge of the liner body 1. This part rarely wears in actual working conditions, and there is no weak position of wear. Therefore, the connection form of the wear-resistant liner fixed to the pump cover of the present invention is more reliable.
[0033] When a reinforcement plate at a certain position needs to be replaced after partial wear, since the eight groups of reinforcement plates are independent of each other, you only need to loosen the two hexagon socket bolts corresponding to the position, pull out the group of reinforcement plates as a whole, and then take out the worn reinforcement plate, replace it with a new one at the same position, and tighten the hexagon socket bolts after assembling it in place to complete the replacement work. For maintenance workers, the maintenance is easy and time-saving.
[0034] Example 2 On the basis of Example 1, each reinforced outer expansion plate 2.1 is connected to the liner body 1 by two hexagon socket bolts 3.
[0035] Example 3 The method for manufacturing the wear-resistant lining plate for a mud pump of the present invention is to manufacture the wear-resistant lining plate for a mud pump in Example 1, specifically: Casting a liner body 1, and processing a countersunk hole 1.1 and a threaded hole 1.2 for connecting a pump cover at corresponding positions on the liner body 1; According to the set angle and size, the reinforced outer expansion plate 2.1, the reinforced middle plate 2.2 and the reinforced shrink plate 2.3 are cast, and the cast steel insert 2.1.1 is pre-embedded when casting the reinforced outer expansion plate 2.1; Then the cast reinforced outer expansion plate 2.1, the reinforced middle plate 2.2 and the reinforced shrinkage plate 2.3 are installed on the liner body 1; When installing the reinforced outer expansion plate 2.1, the reinforced middle plate 2.2 and the reinforced shrink plate 2.3, the reinforced outer expansion plate 2.1 of the first group of reinforced plates 2 is matched with the liner body 1 through a step, and then the hexagon socket bolt 3 is completely screwed into the countersunk hole 1.1 and connected to the cast steel insert 2.1.1 through a thread, and the reinforced middle plate 2.2 and the reinforced shrink plate 2.3 are matched with the liner body 1 through a step, and the reinforced middle plate 2.2 and the reinforced shrink plate 2.3 are also matched with the reinforced outer expansion plate 2.1 are squeezed against each other through the matching edges; when installing the other seven groups of reinforcement plates 2, first install the reinforcement middle plate 2.2 and the reinforcement contraction plate 2.3, and then install and fix the reinforcement outer expansion plate 2.1 for squeezing. After all eight groups of reinforcement plates 2 are pre-installed, that is, the reinforcement plates 2 and the liner body 1 plane and step surface fit well, and the circumferential dimensions are consistent, then tighten all the hexagon socket bolts 3 in turn, and then according to the mud pump assembly requirements, fix the liner body 1 on the pump cover through the threaded holes 1.2, and the assembly is completed.
[0036] Since the liner body 1 of the present invention is made of ordinary cast steel material, it has good impact resistance. During installation and disassembly operations, it is only necessary to tighten or loosen the hexagon socket bolts 3. For maintenance, the assembly of the wear-resistant liner and the replacement of the reinforcement plate 2 of the present invention are very convenient and easy to operate.
[0037] The wear-resistant lining of the present invention is divided into a lining body 1 and a reinforcing plate 2, which successfully solves the problems of great casting difficulty and low yield rate caused by large lining size when high chromium cast iron is cast as a whole, and the need to replace the wear-resistant lining as a whole after the edge is worn to a certain extent.
[0038] The liner body 1 and the reinforcement plate 2 are reliably and effectively connected by the hexagonal bolt 3. The hexagon socket bolt 3 is completely screwed into the countersunk hole 1.1. This connection method will not affect the assembly of the liner and other parts. As shown in Figure 2, the reinforcement plate 2 is matched with the liner body 1 through the step, and the outer edge is flush after cutting and matching. This structural form can not only ensure that the overall flatness of the wear-resistant liner is ≤0.5mm, but also ensure that the circumferential dimension meets the tolerance requirements of the wear-resistant liner and controls it within a very small range after tightening the hexagon socket bolt 3. In the assembly process of this structural form, the reinforcement plate 2 is pressed by the step surface of the liner body 1, which plays a good fixing role. The threaded holes 1.2 used for fixing the wear-resistant liner and the pump cover are evenly distributed near the inner edge of the liner body 1. The number of threaded holes is determined by the number of holes on the pump cover that match it. This position rarely wears in actual working conditions, so the threaded holes 1.2 are not a weak part for the entire liner, and this connection form is more reliable.
Claims
1. Wear-resistant lining for mud pump, characterized in that: The invention comprises a circular ring-shaped lining body (1), wherein a plurality of groups of reinforcing plates (2) are detachably fixed around the outer edge of the lining body (1), and the plurality of groups of reinforcing plates (2) are formed around the outer edge of the lining body (1) to form a circular ring-shaped lining reinforcement structure, wherein each group of reinforcing plates (2) comprises a reinforcing outer expansion plate (2.1), a reinforcing middle plate (2.2), and a reinforcing shrinkage plate (2.3) which are detachably fixed in sequence around the outer edge of the lining body (1), and the reinforcing outer expansion plate (2.1), the reinforcing middle plate (2.2), and the reinforcing shrinkage plate (2.3) are all arranged in a fan ring shape, and the fan-shaped busbar of the reinforcing outer expansion plate (2.1) expands outwardly from a side close to the lining body (1) to a side away from the lining body (1) along the center line of the fan ring, and the fan ring busbar of the reinforcing shrinkage plate (2.3) shrinks inwardly from a side close to the lining body (1) to a side away from the lining body (1) along the center line of the fan shape.
2. The wear-resistant lining plate for a mud pump according to claim 1, characterized in that: The lining plate body (1) is provided with a step, and the reinforced outer expansion plate (2.1), the reinforced middle plate (2.2) and the reinforced shrinkage plate (2.3) are mounted on one side of the lining plate body (1) and a matching step that matches the step is provided. The lining plate body (1) matches with the reinforced outer expansion plate (2.1), the reinforced middle plate (2.2) and the reinforced shrinkage plate (2.3) via the step, and after matching, the outer edges of the reinforced outer expansion plate (2.1), the reinforced middle plate (2.2) and the reinforced shrinkage plate (2.3) are flush with the outer edge of the lining plate body (1).
3. The wear-resistant lining plate for a mud pump according to claim 2, characterized in that: A cast steel insert is pre-embedded on the step surface where the reinforced outer expansion plate (2.1) and the lining plate body (1) cooperate with each other, and a countersunk hole (1.1) is processed on the inner edge of the lining plate body (1) at a position corresponding to the step surface where the lining plate body (1) and the reinforced outer expansion plate (2.1) cooperate with each other. The reinforced outer expansion plate (2.1) and the lining plate body (1) are detachably fixed by screwing the hexagon socket bolts (3) into the cast steel insert through the countersunk holes (1.1).
4. The wear-resistant lining plate for a mud pump according to claim 3, characterized in that: A plurality of threaded holes (1.2) for connecting to a pump cover are evenly arranged around the circumference of the lining plate body (1) near the inner edge.
5. The wear-resistant lining plate for a mud pump according to claim 1, characterized in that: Taking the line connecting the two ends of the arc line of the fan ring of the enhanced external expansion plate (2.1) close to the liner body (1) and the center of the liner body (1) as the reference line, the generatrix on both sides of the fan ring of the enhanced external expansion plate (2.1) is offset from the side close to the liner body (1) to the side away from the liner body (1) in the direction away from the center line of the fan ring, and the angle between the generatrix and the reference line on the corresponding side is an acute angle; Taking the line connecting the two ends of the arc line of the fan ring of the enhanced shrinkage plate (2.3) close to the liner body (1) and the center of the liner body (1) as the reference line, the generatrix on both sides of the fan ring of the enhanced shrinkage plate (2.3) is offset from the side close to the liner body (1) to the side away from the liner body (1) in the direction close to the center line of the fan ring, and the angle between the generatrix and the reference line on the corresponding side is an acute angle.
6. The wear-resistant lining plate for a mud pump according to claim 5, characterized in that: The angle between the generatrix of the fan ring of the enhanced outward expansion plate (2.1) and the reference line of the corresponding side is α, and the angle between the generatrix of the fan ring of the enhanced contraction plate (2.3) and the reference line of the corresponding side is β, α=β; Both sides of the reinforced middle plate (2.2) are respectively adapted to the shape of the reinforced contraction plate (2.3) or the reinforced outer expansion plate (2.1) on the corresponding side.
7. The wear-resistant lining plate for a mud pump according to claim 6, characterized in that: The lining plate body (1) is cast from cast steel, and the reinforced outer expansion plate (2.1), the reinforced middle plate (2.2) and the reinforced shrinkage plate (2.3) are cast from high-chromium cast iron.
8. The wear-resistant lining plate for a mud pump according to claim 7, characterized in that: Eight groups of reinforcing plates (2) are detachably fixed on the lining body (1) around its outer edge, that is, a group of reinforcing plates (2) is arranged every 45° around the outer edge of the lining body (1).
9. A method for manufacturing a wear-resistant liner for a mud pump, characterized in that: The wear-resistant lining plate for a mud pump as claimed in claim 8 is manufactured by: Casting a liner body (1), and processing a countersunk hole (1.1) and a threaded hole (1.2) for connecting a pump cover at corresponding positions on the liner body (1); Casting the enhanced outer expansion plate (2.1), the enhanced middle plate (2.2) and the enhanced shrinkage plate (2.3) according to the set angle and size, and pre-embedding the cast steel insert when casting the enhanced outer expansion plate (2.1); Then, the cast reinforced outer expansion plate (2.1), the reinforced middle plate (2.2) and the reinforced shrinkage plate (2.3) are installed on the liner body (1).
10. The method for manufacturing a wear-resistant lining plate for a mud pump according to claim 9, characterized in that: When installing the reinforced outer expansion plate (2.1), the reinforced middle plate (2.2) and the reinforced shrinkage plate (2.3), the reinforced outer expansion plate (2.1) of the first group of reinforced plates (2) is matched with the liner body (1) through a step, and then the hexagon socket bolt (3) is completely screwed into the countersunk hole (1.1) and connected to the cast steel insert through a thread, and the reinforced middle plate (2.2) and the reinforced shrinkage plate (2.3) are matched with the liner body (1) through a step, and the reinforced middle plate (2.2) and the reinforced shrinkage plate (2.3) are also connected with the reinforced outer expansion plate (2.1). .1) are squeezed together by matching edges; when installing the remaining seven sets of reinforcement plates (2), first install the reinforcement middle plate (2.2) and the reinforcement contraction plate (2.3), and then install and fix the reinforcement outer expansion plate (2.1) and squeeze them together. After all eight sets of reinforcement plates (2) are pre-installed, that is, the reinforcement plates (2) and the liner body (1) plane and step surface are well fitted, and the circumferential dimensions are consistent, then tighten all the hexagon socket bolts (3) in sequence, and then fix the liner body (1) to the pump cover through the threaded holes (1.2) according to the mud pump assembly requirements, and the assembly is completed.