Wear-resisting plate and switching assembly for concrete delivery pump

Abstract

The utility model relates to the technical field of concrete pumping machinery, in particular to a wear-resisting plate for a concrete delivery pump and a switching assembly, the wear-resisting plate for the concrete delivery pump comprises a steel plate base body, a lining plate and two alloy rings, a limiting groove is formed in the steel plate base body, and through holes corresponding to the two alloy rings in a one-to-one mode are formed in the steel plate base body; a butt joint face and a sliding face are arranged on the two opposite sides of the alloy ring respectively, the butt joint face is matched with the edge of the through hole, the butt joint face comprises two thickening sections and two thinning sections which are alternately arranged, and the two thickening sections are symmetrically arranged in the arc direction; the two alloy rings are arranged in the corresponding through holes respectively, concave parts matched with the contours of the butt joint faces are formed in the edges of the through holes, and the sliding faces are exposed out of the limiting grooves and flush with the surface of the lining plate. The alloy ring is designed to be of an unequal-thickness structure with a thickened section and a thinned section, so that the requirements for impact wear resistance and wear resistance in pumping operation are met, and the dual effects of reducing consumption of precious rare metal and prolonging the service life are achieved.

Description

Technical Field

[0001] This utility model relates to the field of concrete pumping machinery technology, and in particular to a wear-resistant plate and switching assembly for a concrete conveying pump. Background Technology

[0002] The wear-resistant plate and its matching cutting ring form a wear-resistant pair, a key wear-resistant component of concrete conveying equipment. The wear-resistant plate is installed on the hopper wall panel, with two holes that connect to two equal-diameter holes on the hopper, leading directly to the two pressure cylinders for concrete. The matching cutting ring is also placed in the hopper, mounted on an 'S' tube and tightly attached to the wear-resistant plate. During concrete pumping, the 'S' tube swings left and right, causing the cutting ring to alternately connect with the two holes in the wear-resistant plate, thus achieving uninterrupted output of pressurized concrete. The cutting ring swings rapidly left and right under the drive of the 'S' tube. Since concrete is mainly composed of sand and gravel, strong impact and friction forces are generated between the cutting ring and the wear-resistant plate, causing impact, wear, and failure of both. Therefore, manufacturing a wear-resistant plate with stable and reliable quality has always been a key technological challenge.

[0003] With technological advancements, the current market primarily utilizes high-chromium cast iron surfacing and cemented carbide brazing, among other precious and rare metals, as the wear-resistant medium in wear-resistant plates. Since cemented carbide accounts for a large portion of the cost of wear-resistant plates, and alloy rings comprise 85% of the total alloy usage, reducing the thickness of the alloy rings has become a common cost-reduction measure. However, this significantly reduces the service life of spectacle plates or cutting rings. How to reduce alloy usage without compromising service life has become a formidable obstacle for the industry. Therefore, it is necessary to provide a new type of wear-resistant plate and switching assembly for concrete pumps to address these technical challenges. Utility Model Content

[0004] The main purpose of this utility model is to provide a wear-resistant plate and switching assembly for concrete pumps, aiming to solve the problem of the large amount of precious and rare metals used in existing wear-resistant plates and switching assemblies for concrete pumps.

[0005] To achieve the above objectives, the present invention proposes a wear-resistant plate for a concrete pump, which is used to allow a cutting ring to move along an arc direction to alternately communicate with two through holes on the wear-resistant plate for the concrete pump. The wear-resistant plate for the concrete pump includes a steel plate substrate, an inner liner plate, and two alloy rings. A limiting groove is formed on the steel plate substrate, and the inner liner plate and the two alloy rings cooperate to fill the limiting groove. The inner liner plate is located between the two alloy rings. The steel plate substrate has through holes that correspond one-to-one with the two alloy rings. The opposite sides of the alloy rings are respectively provided with a mating surface and a sliding surface. The mating surface cooperates with the edge of the through hole. The mating surface includes two alternately arranged thickened sections and two thinned sections, and the two thickened sections are symmetrically arranged along the arc direction.

[0006] Two alloy rings are respectively disposed in the corresponding through holes, and the edges of the through holes form recesses that match the contours of the mating surfaces; and the sliding surface is exposed in the limiting groove and flush with the surface of the inner liner.

[0007] Optionally, the arc angles corresponding to the two thickened sections located on the outer side of the steel plate substrate are 88° to 118°, and the arc angles corresponding to the two thickened sections located on the outer side of the steel plate substrate are 68° to 98°; and / or, the inner wall of the alloy ring is provided with a weld overlay layer, and a weld overlay thickening layer is also formed on the weld overlay layer on the inner wall of the alloy ring facing the thickened section area; and / or, the inner wall of the through hole is provided with a weld overlay layer, and a weld overlay thickening layer is also formed on the weld overlay layer on the inner wall of the through hole facing the thickened section area; and / or, the thickened section and the thinning section are connected by a convex ridge or a slope.

[0008] Optionally, the alloy ring includes a first splicing block and a second splicing block, with two first splicing blocks and two second splicing blocks alternately arranged. The thickening segment is formed on each of the two first splicing blocks, and the thinning segment is formed on each of the two second splicing blocks; or multiple first splicing blocks are spliced ​​end to end in sequence to form the thickening segment, and multiple second splicing blocks are spliced ​​end to end in sequence to form the thinning segment.

[0009] Optionally, the first splicing block is formed by splicing multiple first arc-shaped structures end to end, and the second splicing block is formed by splicing multiple second arc-shaped structures end to end; and / or, the two ends of the first arc-shaped structure and the two ends of the second arc-shaped structure respectively form a welding surface and a concave surface, the first arc-shaped structures at both ends of the first splicing block are respectively welded to the second arc-shaped structures in two adjacent second splicing blocks, and the two adjacent first arc-shaped structures and the two adjacent second arc-shaped structures are all connected by welding through the welding surface and the concave surface.

[0010] Optionally, the welding surface includes an arched curved surface and a butt joint plane connecting the two ends of the arched curved surface, the butt joint plane being arranged parallel to the cross section in the thickness direction of the arc-shaped sheet;

[0011] Alternatively, the welding surface may include a butt joint plane and an arched curved surface connected in sequence, wherein the butt joint plane is arranged parallel to the cross section in the thickness direction of the arc-shaped sheet.

[0012] Optionally, the welding surface includes a connected butt joint plane and a butt joint bevel. The butt joint plane is parallel to the cross-section in the thickness direction of the arc-shaped piece, and the butt joint bevel is inclined close to the arc-shaped piece along the extension direction of the butt joint plane.

[0013] Alternatively, the welding surface may include two connected butt bevels, which are inclined close to the arc-shaped sheet along the extension direction of the cross section in the thickness direction of the arc-shaped sheet.

[0014] In addition, this utility model also provides a switching assembly for a concrete conveying pump, including a cutting ring and a wear-resistant plate for the concrete conveying pump. The cutting ring includes a barrel ring body and a wear-resistant flat ring body. The first end of the barrel ring body is used to communicate with the conveying pipeline. The wear-resistant flat ring body is disposed at the second end of the barrel ring body, and the mating surface of the wear-resistant flat ring body is in sliding contact with the alloy ring and the surface of the inner lining plate.

[0015] Optionally, a first protrusion is formed at the second end of the barrel ring body, protruding in a direction away from the central axis of the barrel ring body; the inner wall of the wear-resistant flat ring body is welded to the first protrusion, and the wall surface of the wear-resistant flat ring body on the side away from the conveying pipeline is in sliding contact with the sliding surface of the alloy ring.

[0016] The wear-resistant flat ring has a gradually expanding wall surface on the side near the conveying pipeline; or the wear-resistant flat ring has a wall surface on the side near the conveying pipeline including a flat section and a gradually expanding section, one end of the gradually expanding section is welded to the first protrusion, the other end is connected to the flat section, and the gradually expanding section has a gradually expanding shape on the side near the central axis of the barrel ring.

[0017] Optionally, the outer wall of the barrel ring is gradually widened in the direction away from the conveying pipeline; the wall surface of the wear-resistant flat ring on the side away from the conveying pipeline is in sliding contact with the sliding surface of the alloy ring;

[0018] A second protrusion is formed on the wall surface of the wear-resistant flat ring body near the conveying pipeline, and the second protrusion is welded to the expanding end of the barrel ring body; or a groove is formed on the wall surface of the wear-resistant flat ring body near the conveying pipeline, and the edge of the groove in the direction near the central axis of the barrel ring body is welded to the expanding end of the barrel ring body.

[0019] In this invention, the alloy ring is designed with unequal thickness sections (thickened and thinned) to meet the different impact and wear resistance requirements of the wear-resistant plate for concrete pumps and the matching cutting ring. Correspondingly, through holes in the steel plate substrate are machined to form recesses of varying depths that match the contour of the alloy ring's mating surface. This facilitates welding the alloy ring to the wear-resistant plate for concrete pumps, forming an integral welded wear-resistant plate. This achieves the dual effect of reducing the consumption of precious rare metals and increasing service life. The alloy ring is designed with a hollowed-out bottom surface, cleverly reducing its weight while ensuring its thickness, thus guaranteeing its impact and wear resistance, and consequently ensuring the long service life of both the wear-resistant plate and the cutting ring. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the wear-resistant plate for the concrete conveying pump in Embodiment 1 of this utility model;

[0022] Figure 2 This is a schematic diagram of the alloy ring structure in Embodiment 1 of this utility model;

[0023] Figure 3 These are schematic diagrams of the welding surfaces in Embodiments 1 and 2 of this utility model;

[0024] Figure 4 This is a schematic diagram of the steel plate substrate in Embodiment 1 of this utility model;

[0025] Figure 5 This is a schematic diagram of the cutting ring structure in Embodiment 3 of this utility model;

[0026] Figure 6 This is a schematic diagram of the cutting ring in Embodiment 4 of this utility model.

[0027] Explanation of icon numbers:

[0028] A. Wear-resistant plate for concrete pumps, 1. Steel plate substrate, 1.1 Through hole, 1.1.1 Recessed part, 2. Alloy ring, 2.1 Butt joint surface, 2.1.1 Thickened section, 2.1.2 Thinned section, 2.1.3 Raised ridge or inclined surface, 2.2 Sliding surface, 2.3 Arched curved surface, 2.4 Butt joint plane, 2.5 Butt joint inclined surface, 3. Weld overlay layer, 4. Weld overlay thickened layer, B. Cutting ring, 5. Barrel ring body, 5.1 First protrusion, 6. Wear-resistant flat ring body, 6.1 Planar section, 6.2 Gradually expanding section, 6.3 Second protrusion, 6.4 Groove, C. Arc direction.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0031] This utility model proposes a wear-resistant plate and switching assembly for concrete pumps, aiming to solve the problem of the large amount of precious and rare metals used in existing wear-resistant plates and switching assemblies for concrete pumps.

[0032] Example 1

[0033] This embodiment provides a wear-resistant plate A for a concrete pump, used to allow a cutting ring B to move along an arc direction, alternately communicating with two through holes 1.1 on the wear-resistant plate A. The wear-resistant plate A includes a steel plate substrate 1 and two alloy rings 2. A limiting groove is formed on the steel plate substrate 1, and an inner liner plate and the two alloy rings 2 cooperate to fill the limiting groove. The inner liner plate is located between the two alloy rings 2. Through holes 1.1 are formed on the steel plate substrate 1, corresponding one-to-one with the two alloy rings 2. The opposite sides of the alloy rings 2 The two sides are respectively provided with a mating surface 2.1 and a sliding surface 2.2. The mating surface 2.1 fits with the edge of the through hole 1.1. The mating surface 2.1 includes two alternating thickened sections 2.1.1 and two thinned sections 2.1.2, and the two thickened sections 2.1.1 are symmetrically arranged along the arc direction C. Two alloy rings 2 are respectively provided in the corresponding through holes 1.1. The edge of the through hole 1.1 forms a recess 1.1.1 that matches the contour of the mating surface 2.1. The sliding surface 2.2 is exposed in the limiting groove and is flush with the surface of the inner liner plate. The alloy ring 2 is designed with an unequal thickness structure consisting of a thickened section 2.1.1 and a thinned section 2.1.2 to meet the different impact and wear resistance requirements of the wear-resistant plate A for concrete pumps and the matching cutting ring B. Correspondingly, the through holes 1.1 on the steel plate substrate 1 are machined to form recesses 1.1.1 of varying depths that match the contour of the mating surface 2.1 of the alloy ring 2. This facilitates the welding of the alloy ring 2 to the wear-resistant plate A for concrete pumps, forming an integral welded wear-resistant plate. This achieves the dual effect of reducing the consumption of precious rare metals and increasing service life. In this embodiment, the thickened section 2.1.1 uses a high impact and wear-resistant alloy, mainly high-chromium cast iron surfacing and hard alloy brazing, while the thinned section 2.1.2 uses a common wear-resistant alloy.

[0034] Based on extensive analysis of the failure mechanisms of spectacle plates and cutting rings, this embodiment designs the alloy ring with a hollowed-out bottom surface, cleverly reducing the weight of the alloy while ensuring the thickness of the alloy ring, thereby guaranteeing the impact resistance and wear resistance of the alloy ring, and thus ensuring the long service life of the spectacle plates and cutting rings.

[0035] Based on the above embodiments, the arc angles corresponding to the two thickened sections 2.1.1 located on the outer side of the steel plate substrate 1 are 88° to 118°, and the arc angles corresponding to the two thickened sections 2.1.1 located on the outer side of the steel plate substrate 1 are 68° to 98°. In one example of this embodiment, the inner wall of the alloy ring 2 is provided with a weld overlay layer 3, and a weld overlay thickening layer 4 is also formed on the weld overlay layer 3 on the inner wall of the alloy ring 2 facing the region of the thickened section 2.1.1. By analyzing the wear of the wear-resistant plate in actual operation and collecting relevant data, the wear-resistant plate was divided into a heavy impact wear zone and a non-impact wear zone. The thickened section 2.1.1 corresponds to the heavy impact wear zone, and the thinned section 2.1.2 corresponds to the non-impact wear zone. The arc angle of the thickened section 2.1.1 located on the outer side of the steel plate substrate 1 is 83° to 93°, and the arc angle of the thickened section 2.1.2 located on the outer side of the steel plate substrate 1 is 63° to 73°. This saves alloy usage while ensuring the wear resistance of the wear-resistant plate. Uneven weld overlays are formed on the inner walls of the thickened section 2.1.1 and the through hole 1.1, matching the thickness of the mating surface 2.1.1. This enhances the impact resistance of the wear-resistant plate in the heavy impact wear zone and the easily worn zone, further reducing the amount of precious rare metals used.

[0036] In one example of this embodiment, the inner wall of the through hole 1.1 is provided with a weld overlay layer 3, and a weld overlay thickening layer 4 is also formed on the weld overlay layer 3 facing the thickening section 2.1.1 region on the inner wall of the through hole 1.1.

[0037] The processing technology of the weld overlay layer 3 and the weld overlay thickening layer 4 is as follows: on the inner wall of the alloy ring 2 or the area corresponding to the thickening section 2.1.1 on the inner wall of the through hole 1.1, first weld one layer, and then weld the entire inner wall evenly to cover the whole hole, thereby forming the weld overlay layer 3 and the weld overlay thickening layer 4, which enhances the impact resistance performance of the impact-resistant area.

[0038] In one example of this embodiment, the thickened section 2.1.1 and the thinned section 2.1.2 are connected by a convex ridge or a slope 2.1.3. The transition at the connection between the thickened section 2.1.1 and the thinned section 2.1.2 via the convex ridge or slope 2.1.3 effectively avoids stress concentration caused by the thickness variation on the alloy ring 2, facilitating the mass production of the wear-resistant plate.

[0039] The alloy ring 2 includes a first splicing block and a second splicing block, with the two first splicing blocks and the two second splicing blocks alternately arranged. Each of the two first splicing blocks has a thickened section 2.1.1, and each of the two second splicing blocks has a thinned section 2.1.2. In one example of this embodiment, multiple first splicing blocks are sequentially spliced ​​end-to-end to form the thickened section 2.1.1, and multiple second splicing blocks are sequentially spliced ​​end-to-end to form the thinned section 2.1.2. The alloy ring 2 adopts a multi-segment splicing structure, which facilitates the separate processing of the thickened section 2.1.1 and the thinned section 2.1.2. Furthermore, the first splicing blocks are made of a high-impact, wear-resistant alloy, while the second splicing blocks are made of a common wear-resistant alloy. This ensures the wear resistance of the alloy ring 2 while reducing the amount of precious and rare metals used, facilitating mass production and reducing production difficulty.

[0040] Furthermore, the first splicing block is formed by splicing multiple first arc-shaped structures end to end, and the second splicing block is formed by splicing multiple second arc-shaped structures end to end. In one example of this embodiment, both ends of the first arc-shaped structure and both ends of the second arc-shaped structure respectively form a welding surface and a concave surface. The first arc-shaped structures at both ends of the first splicing block are welded to the second arc-shaped structures in two adjacent second splicing blocks, and the two adjacent first arc-shaped structures and the two adjacent second arc-shaped structures are connected by welding through the welding surface and the concave surface. The multi-segment splicing structure facilitates production, helps reduce deformation, improves production efficiency and quality, and reduces the waste of precious and rare metals. Through the butt joint of the welding surface and the concave surface, the butt joint between adjacent arc-shaped pieces can be quickly achieved, which facilitates welding.

[0041] Specifically, the welding surface includes an arched curved surface 2.3 and a butt joint plane 2.4 connecting both ends of the arched curved surface 2.3. The butt joint plane 2.4 is parallel to the cross-section in the thickness direction of the arc-shaped sheet. In one example of this embodiment, the welding surface includes a butt joint plane 2.4 and an arched curved surface 2.3 connected in sequence, with the butt joint plane 2.4 parallel to the cross-section in the thickness direction of the arc-shaped sheet. The use of the corresponding shape of the welding surface and the concave surface in this embodiment facilitates butt jointing and avoids leakage of weld slurry during the welding process, ensuring the welding effect.

[0042] Example 2

[0043] The difference from Embodiment 1 is that the welding surface includes a connecting butt joint plane 2.4 and a butt joint inclined plane 2.5. The butt joint plane 2.4 is arranged parallel to the cross section in the thickness direction of the arc-shaped piece, and the butt joint inclined plane 2.5 is inclined close to the arc-shaped piece along the extension direction of the butt joint plane 2.4.

[0044] In one example of this embodiment, the welding surface includes two connected butt bevels 2.5, which are inclined close to the arc-shaped sheet along the extension direction of the cross section in the thickness direction of the arc-shaped sheet.

[0045] Example 3

[0046] See Figure 5 This embodiment provides a switching assembly for a concrete pump, including a cutting ring B and a wear-resistant plate A for the concrete pump as described above. The cutting ring B includes a barrel ring body 5 and a wear-resistant flat ring body 6. The first end of the barrel ring body 5 is used to communicate with the conveying pipeline; the wear-resistant flat ring body 6 is disposed at the second end of the barrel ring body 5, and the wear-resistant flat ring body 6 slides in contact with the mating surface 2.1 of the alloy ring 2 and the surface of the inner lining plate. The conveying pipeline is connected to the output end of the swing arm, and the swing arm can drive the cutting ring B to slide relative to the wear-resistant plate A for the concrete pump through the conveying pipeline, realizing alternating communication with the two through holes 1.1.

[0047] In this embodiment, the second end of the barrel ring 5 forms a first protrusion 5.1 that protrudes in a direction away from the central axis of the barrel ring 5; the inner wall of the wear-resistant flat ring 6 is welded to the first protrusion 5.1, and the wall surface of the wear-resistant flat ring 6 away from the conveying pipeline slides in contact with the sliding surface 2.2 of the alloy ring 2.

[0048] In this embodiment, the wall surface of the wear-resistant flat ring 6 near the conveying pipeline is gradually widened along the direction close to the central axis of the barrel ring 5. In one example of this embodiment, the wall surface of the wear-resistant flat ring 6 near the conveying pipeline includes a flat section 6.1 and a gradually widening section 6.2. One end of the gradually widening section 6.2 is welded to the first protrusion 5.1, and the other end is connected to the flat section 6.1. The gradually widening section 6.2 is gradually widened along the direction close to the central axis of the barrel ring 5.

[0049] In this embodiment, wear-resistant flat ring 6 with different structures is welded to barrel ring 5, which saves on the amount of precious and rare metals used while ensuring the connection strength between wear-resistant flat ring 6 and barrel ring 5.

[0050] Example 4

[0051] The difference from Example 3 is as follows: See Figure 6 The outer wall of the barrel ring 5 is gradually widened in the direction away from the conveying pipeline; the wall surface of the wear-resistant flat ring 6 on the side away from the conveying pipeline is in sliding contact with the sliding surface 2.2 of the alloy ring 2;

[0052] A second protrusion 6.3 is formed on the wall surface of the wear-resistant flat ring 6 near the conveying pipeline, and the second protrusion 6.3 is welded to the expanding end of the barrel ring 5; in one example of this embodiment, a groove 6.4 is formed on the wall surface of the wear-resistant flat ring 6 near the conveying pipeline, and the edge of the groove 6.4 near the central axis of the barrel ring 5 is welded to the expanding end of the barrel ring 5.

[0053] Since the switching assembly for the concrete pump includes the wear-resistant plate A for the concrete pump as described above, the switching assembly for the concrete pump possesses all the beneficial effects of the wear-resistant plate A for the concrete pump, which will not be elaborated here.

[0054] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A concrete pump wear plate for cutting ring (B) to move in arc direction to alternate communication with two through holes (1.1) on the concrete pump wear plate (A), the concrete pump wear plate (A) comprises a steel plate base body (1), a limiting groove is formed on the steel plate base body (1), an inner lining plate and two alloy rings (2) cooperate to fill the limiting groove, the inner lining plate is located between the two alloy rings (2), characterized in that, The steel plate base body (1) is provided with the through hole (1.1) corresponding to the two alloy rings (2); the opposite sides of the alloy ring (2) are respectively provided with the butt joint surface (2.1) and the sliding surface (2.2), the butt joint surface (2.1) is matched with the edge of the through hole (1.1), the butt joint surface (2.1) comprises two thickening sections (2.1.1) and two thinning sections (2.1.2) arranged alternately, and the two thickening sections (2.1.1) are symmetrically arranged along the arc direction (C); The two alloy rings (2) are arranged in the corresponding through hole (1.1), and the edge of the through hole (1.1) forms a recess (1.1.1) matched with the contour of the butt joint surface (2.1); and the sliding surface (2.2) is exposed to the limiting groove and flush with the surface of the inner lining plate.

2. The wear plate for a concrete delivery pump of claim 1, wherein, The two thickening sections (2.1.1) located on the outer side of the steel plate base body (1) correspond to the arc angle of 88°-118°, and the two thickening sections (2.1.1) located on the outer side of the steel plate base body (1) correspond to the arc angle of 68°-98°; and / or, the inner wall of the alloy ring (2) is provided with a cladding layer (3), and the cladding layer (3) of the alloy ring (2) opposite to the region of the thickening section (2.1.1) is further provided with a cladding thickening layer (4); and / or, the inner wall of the through hole (1.1) is provided with a cladding layer (3), and the cladding layer (3) of the through hole (1.1) opposite to the region of the thickening section (2.1.1) is further provided with a cladding thickening layer (4); and / or, the thickening section (2.1.1) and the thinning section (2.1.2) are connected by a ridge surface or an inclined surface (2.1.3).

3. The wear plate for a concrete delivery pump as set forth in claim 2, wherein The alloy ring (2) comprises a first splicing block and a second splicing block, the two first splicing blocks and the two second splicing blocks are arranged alternately, the two first splicing blocks are respectively provided with the thickening section (2.1.1), and the two second splicing blocks are respectively provided with the thinning section (2.1.2); or a plurality of first splicing blocks are sequentially spliced to form the thickening section (2.1.1), and a plurality of second splicing blocks are sequentially spliced to form the thinning section (2.1.2).

4. The wear plate for a concrete delivery pump as set forth in claim 3, wherein The first splicing block is formed by sequentially splicing a plurality of first arc structures, and the second splicing block is formed by sequentially splicing a plurality of second arc structures; and / or, the two ends of the first arc structure and the two ends of the second arc structure are respectively formed with a welding surface and a concave surface, the first arc structure at the two ends of the first splicing block is respectively welded with the second arc structure in the adjacent two second splicing blocks, and the two first arc structures arranged adjacently and the two second arc structures arranged adjacently are welded and connected through the welding surface and the concave surface.

5. The wear plate for a concrete delivery pump as set forth in claim 4, wherein The welding surface comprises an arc-shaped curved surface (2.3) and a butt joint plane (2.4) connected to the two ends of the arc-shaped curved surface (2.3), and the butt joint plane (2.4) is arranged in parallel with the cross section in the thickness direction of the arc-shaped sheet; Or the welding surface comprises a butt plane (2.4) and an arch-shaped curved surface (2.3) connected in sequence, and the butt plane (2.4) is arranged in parallel with the section in the thickness direction of the arc-shaped sheet.

6. The wear plate for a concrete delivery pump as set forth in claim 4, wherein The welding surface comprises a butt plane (2.4) and a butt inclined surface (2.5) connected in sequence, the butt plane (2.4) is arranged in parallel with the section in the thickness direction of the arc-shaped sheet, and the butt inclined surface (2.5) is arranged in an inclined manner along the extension direction of the butt plane (2.4) and close to the arc-shaped sheet. Or the welding surface comprises two butt inclined surfaces (2.5) connected in sequence, and the butt inclined surfaces (2.5) are arranged in an inclined manner along the extension direction of the section in the thickness direction of the arc-shaped sheet and close to the arc-shaped sheet.

7. A switching assembly for a concrete delivery pump, characterized by The wear plate comprises a cutting ring (B) and the wear plate for a concrete delivery pump according to any one of claims 1 to 6, the cutting ring (B) comprises a barrel ring body (5) and a wear flat ring body (6), a first end of the barrel ring body (5) is used for communicating with a delivery pipeline, and the wear flat ring body (6) is arranged at a second end of the barrel ring body (5) and is in sliding contact with a butt surface (2.1) of the alloy ring (2) and a surface of the lining plate.

8. The switching assembly for a concrete delivery pump of claim 7, wherein, A second end of the barrel ring body (5) forms a first protrusion (5.1) protruding in a direction away from a central axis of the barrel ring body (5), and an inner wall of the wear flat ring body (6) is welded to the first protrusion (5.1), and a wall surface of the wear flat ring body (6) on a side away from the delivery pipeline is in sliding contact with the sliding surface (2.2) of the alloy ring (2). A wall surface of the wear flat ring body (6) on a side close to the delivery pipeline is arranged in a gradually expanding manner in a direction close to the central axis of the barrel ring body (5), or the wall surface of the wear flat ring body (6) on the side close to the delivery pipeline comprises a flat section (6.1) and a gradually expanding section (6.2), one end of the gradually expanding section (6.2) is welded to the first protrusion (5.1), the other end is connected to the flat section (6.1), and the gradually expanding section (6.2) is arranged in a gradually expanding manner in the direction close to the central axis of the barrel ring body (5).

9. The switching assembly for a concrete delivery pump of claim 8, wherein, An outer wall of the barrel ring body (5) is arranged in a gradually expanding manner in a direction away from the delivery pipeline, and a wall surface of the wear flat ring body (6) on a side away from the delivery pipeline is in sliding contact with the sliding surface (2.2) of the alloy ring (2). A wall surface of the wear flat ring body (6) on a side close to the delivery pipeline forms a second protrusion (6.3) welded to a gradually expanding end of the barrel ring body (5), or the wall surface of the wear flat ring body (6) on the side close to the delivery pipeline forms a groove (6.4) with an edge close to the central axis of the barrel ring body (5) welded to the gradually expanding end of the barrel ring body (5).

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