A ceramic rod group-high chromium cast iron composite blow bar

Abstract

The present invention discloses a ceramic rod group-high chromium cast iron composite plate hammer, and the two sides of the working area of ​​the plate hammer include multiple groups of plate hammer unit assemblies arranged symmetrically; the plate hammer unit assembly includes two heat-resistant cast iron plates arranged in parallel; an alumina ceramic rod group and a ZTA ceramic rod group are fixed between the two heat-resistant cast iron plates. The present invention adopts an alumina ceramic rod group and a ZTA ceramic rod group as reinforcements and composites them with heat-resistant cast iron plates to prepare a crusher plate hammer; the heat-resistant cast iron plate is used as a matrix material to connect the alumina ceramic rod group and the ZTA ceramic rod group and transmit and withstand impact loads during the service of the plate hammer, and the alumina ceramic rod group and the ZTA ceramic rod group improve the overall wear resistance of the plate hammer; the superiority of the present invention lies in that the ceramic material has the characteristics of high hardness, good wear resistance, wide sources and low prices, and the composite plate hammer prepared with it as a reinforcement has good comprehensive performance and industrialization prospects.

Description

Technical Field

[0001] The invention relates to the technical field of crusher plate hammers, and more specifically to a ceramic rod group-high chromium cast iron composite plate hammer. Background Art

[0002] With the development of the national economy, various supporting infrastructures such as road construction and real estate construction are constantly improving. As the amount of natural sand and gravel continues to decrease, machine-made sand and gravel can meet industrial needs and effectively improve the performance of building materials, and are widely used in various construction fields. According to statistics, the development prospects of the machine-made sand industry in the future for a long time, at least in the next ten years, are very impressive. The crusher hammer is an important component of the crusher and the main consumable part of the crushing process of the crusher. Usually, the consumption of the crusher hammer can reach 5% to 15% of the production cost of machine-made sand and gravel. Therefore, the quality of the service performance of the crusher hammer is directly related to the working efficiency of the crusher, and it is also a key issue of concern to the industry.

[0003] In actual working conditions, the high-speed rotating hammer of the crusher hits the material violently to break it, and the hammer will also be seriously worn. At present, the materials used to manufacture crusher hammers at home and abroad include new wear-resistant cast steel (low alloy steel, high manganese steel, high carbon chromium-nickel-molybdenum alloy steel) and new high manganese steel (high chromium high wear-resistant alloy cast iron and high vanadium high wear-resistant alloy cast iron) and other different types of wear-resistant materials. The casting process of crusher hammer usually includes traditional integral casting and bimetallic composite molding process.

[0004] Although the crusher hammer has adopted relatively new wear-resistant materials and technology, under actual working conditions, the service life of a set of crusher hammers is only about 10,000 tons or even less, and the service life of a relatively high-quality crusher hammer is about 20,000 tons; usually a set of crusher hammers weighs about 1.4 tons, and the market price is 14,000 to 18,000 yuan, which means the cost of a set of crusher hammers is about 20,000 to 25,000 yuan, which is relatively high. If the life of the crusher hammer is doubled, it can save hundreds of thousands of wear costs a year, and at the same time, it can save a lot of time and production line interruptions caused by repairing and replacing the crusher hammer, saving cost losses.

[0005] The invention patent CN104690231A proposes a method for enhancing the wear resistance of high chromium cast iron by using high-hardness ceramic particles in the working area of ​​the composite plate hammer, thereby improving the comprehensive wear resistance of the plate hammer, but does not consider the problem of granular ceramic shedding caused by the different material properties of granular ceramic and high chromium cast iron in actual working conditions; the utility model CN209333848U proposes a high-chromium-based ceramic plate hammer structure including a first plate body placed on the top and a second plate body fixed with a ceramic block, which is fixed by bolts, but does not consider the risk caused by insufficient strength of the bolts under actual working conditions of high impact of the first and second plates; CN202860629U proposes a high-wear-resistant composite plate hammer for the rotor of an impact crusher, and a cemented carbide rod with a diameter of 5-30 mm is inlaid on the working surface of the plate hammer body, but cemented carbide is usually very expensive and has a heavy cost burden.

[0006] Therefore, how to provide a plate hammer with strong wear resistance and impact resistance, thereby reducing loss costs, is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0007] In view of this, the present invention provides a ceramic rod group-high chromium cast iron composite plate hammer, aiming to solve the above technical problems.

[0008] In order to achieve the above object, the present invention adopts the following technical solution:

[0009] A ceramic rod group-high chromium cast iron composite plate hammer, wherein both sides of the working area of ​​the plate hammer include a plurality of groups of plate hammer unit components arranged symmetrically;

[0010] The plate hammer unit assembly comprises two heat-resistant cast iron plates arranged in parallel; an alumina ceramic rod group and a ZTA ceramic rod group are fixed between the two heat-resistant cast iron plates.

[0011] Through the above technical scheme, the present invention adopts an alumina ceramic rod group and a ZTA ceramic rod group as a reinforcement and a composite with a heat-resistant cast iron plate to prepare a crusher hammer; the heat-resistant cast iron plate is used as a matrix material to connect the alumina ceramic rod group and the ZTA ceramic rod group and transmit and withstand impact loads during the service of the hammer, and the alumina ceramic rod group and the ZTA ceramic rod group improve the overall wear resistance of the hammer.

[0012] Preferably, in the above-mentioned ceramic rod group-high chromium cast iron composite plate hammer, the alumina ceramic rod group includes a plurality of alumina ceramic rods, and the ZTA ceramic rod group includes a plurality of ZTA ceramic rods; the diameter of the alumina ceramic rod is smaller than the diameter of the ZTA ceramic rod.

[0013] Preferably, in the above-mentioned ceramic rod group-high chromium cast iron composite plate hammer, the multiple alumina ceramic rods are connected to the ends of the heat-resistant cast iron plate in the form of three wavy lines; the multiple ZTA ceramic rods are connected to the ends of the heat-resistant cast iron plate in a straight line, and the multiple ZTA ceramic rods are located between the multiple alumina ceramic rods.

[0014] Preferably, in the above-mentioned ceramic rod group-high chromium cast iron composite plate hammer, the lower end diameter of the alumina ceramic rod is 12 mm, the draft angle is 0.5°, and the length is 110 mm; the lower end diameter of the ZTA ceramic rod is 22 mm, the draft angle is 0.5°, and the length is 110 mm.

[0015] Preferably, in the above-mentioned ceramic rod group-high chromium cast iron composite plate hammer, the heat-resistant cast iron plate is high chromium cast iron.

[0016] Preferably, in the above ceramic rod assembly-high chromium cast iron composite plate hammer, the heat-resistant cast iron plate is provided with fixing holes for connecting with the alumina ceramic rod and the ZTA ceramic rod, and the sizes of the fixing holes are 22.5 mm and 12.5 mm respectively.

[0017] Preferably, in the above ceramic rod set-high chromium cast iron composite plate hammer, the surface of the alumina ceramic rod has a plurality of first protrusions uniformly; the surface of the ZTA ceramic rod has a plurality of second protrusions uniformly. After gravity casting, the contact area with the matrix high chromium cast iron is increased, and the anti-slip and fixing effect is played.

[0018] Preferably, in the above-mentioned ceramic rod group-high chromium cast iron composite plate hammer, the size of the heat-resistant cast iron plate is 240mm*83mm*2mm.

[0019] Preferably, in the above-mentioned ceramic rod group-high chromium cast iron composite plate hammer, the plate hammer unit assemblies on a single side of the working area of ​​the plate hammer are 5 groups.

[0020] Preferably, in the above-mentioned ceramic rod group-high chromium cast iron composite plate hammer, the heat-resistant cast iron plate opposite to the single-sided end panel of the plate hammer is embedded in the single-sided end panel of the plate hammer and is flush with the plate surface of the heat-resistant cast iron plate.

[0021] The alumina ceramics and the ZTA ceramic rods used in the present invention are very different from high-chromium cast iron in physical and chemical properties. If a composite plate hammer of alumina and ZTA rod-shaped ceramics and high-chromium cast iron is formed by forming an effective connection interface, a special process must be adopted, which usually presents great challenges in terms of technical difficulty and design cost. The linear expansion coefficient of ceramic materials such as alumina and ZTA is quite different from that of metals such as high-chromium cast iron. If thermal connection is adopted, residual stress will be generated in the joint area, weakening the mechanical properties of the joint. In addition, the actual service state of the crusher plate hammer is high extrusion and high impact conditions. The difference in plastic toughness of the interface connection joint area under high extrusion and high impact conditions causes cracks to occur, resulting in plate hammer failure. The ceramic rods involved in the present invention are designed into rods of different sizes and with characteristic shapes. The low interface bonding strength and poor comprehensive performance of the ceramic rod and the high-chromium cast iron composite material are overcome by mechanical anti-detachment methods, resulting in the failure of the ceramic rod to fall off during the actual service process of the composite plate hammer, while greatly reducing the technical difficulty and price cost of ceramic-metal composites.

[0022] It can be seen from the above technical scheme that compared with the prior art, the present invention discloses a ceramic rod group-high chromium cast iron composite plate hammer. The advantage of the present invention lies in that the ceramic material has the characteristics of high hardness, good wear resistance, wide source and low price. The composite plate hammer prepared with it as the reinforcement has good comprehensive performance and industrialization prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 The accompanying drawing is a schematic structural diagram of a ceramic rod assembly-high chromium cast iron composite blow bar provided by the present invention;

[0025] Figure 2 The accompanying drawing is a schematic structural diagram of the plate hammer unit assembly provided by the present invention.

[0026] in:

[0027] 1-Ball hammer;

[0028] 2-Ball hammer unit assembly;

[0029] 21- heat-resistant cast iron plate; 211- fixing hole; 22- alumina ceramic rod; 221- first protrusion; 23- ZTA ceramic rod; 231- second protrusion. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See attached Figure 1 and attached Figure 2 , the embodiment of the present invention discloses a ceramic rod group-high chromium cast iron composite plate hammer, and the two sides of the working area of ​​the plate hammer 1 include multiple groups of plate hammer unit assemblies 2 arranged symmetrically;

[0032] The blow hammer unit assembly 2 comprises two heat-resistant cast iron plates 21 arranged in parallel; an alumina ceramic rod group and a ZTA ceramic rod group are fixed between the two heat-resistant cast iron plates 21 .

[0033] In order to further optimize the above technical solution, the alumina ceramic rod group includes a plurality of alumina ceramic rods 22 , and the ZTA ceramic rod group includes a plurality of ZTA ceramic rods 23 ; the diameter of the alumina ceramic rod 22 is smaller than the diameter of the ZTA ceramic rod 23 .

[0034] In order to further optimize the above technical solution, multiple alumina ceramic rods 22 are connected to the ends of the heat-resistant cast iron plate 21 in the shape of three wavy lines; multiple ZTA ceramic rods 23 are connected to the ends of the heat-resistant cast iron plate 21 in the shape of straight lines, and the multiple ZTA ceramic rods 23 are located between the multiple alumina ceramic rods 22.

[0035] In order to further optimize the above technical solution, the lower end diameter of the alumina ceramic rod 22 is 12 mm, the draft angle is 0.5°, and the length is 110 mm; the lower end diameter of the ZTA ceramic rod 23 is 22 mm, the draft angle is 0.5°, and the length is 110 mm.

[0036] In order to further optimize the above technical solution, the heat-resistant cast iron plate 21 is high-chromium cast iron.

[0037] In order to further optimize the above technical solution, a fixing hole 211 for connecting with the alumina ceramic rod 22 and the ZTA ceramic rod 23 is opened on the heat-resistant cast iron plate 21 .

[0038] In order to further optimize the above technical solution, the surface of the alumina ceramic rod 22 is uniformly provided with a plurality of first protrusions 221 ; the surface of the ZTA ceramic rod 23 is uniformly provided with a plurality of second protrusions 231 .

[0039] In order to further optimize the above technical solution, the size of the heat-resistant cast iron plate 21 is 240 mm*83 mm*2 mm.

[0040] In order to further optimize the above technical solution, the number of the plate hammer unit assemblies 2 on a single side of the working area of ​​the plate hammer 1 is 5 groups.

[0041] In order to further optimize the above technical solution, the heat-resistant cast iron plate 21 opposite to the single-side end panel of the blow hammer 1 is embedded in the single-side end panel of the blow hammer 1 and is flush with the plate surface of the heat-resistant cast iron plate 21.

[0042] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0043] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A ceramic rod group-high chromium cast iron composite blow bar, characterized in that: Both sides of the working area of ​​the plate hammer (1) include a plurality of groups of plate hammer unit assemblies (2) arranged symmetrically; The plate hammer unit assembly (2) comprises two heat-resistant cast iron plates (21) arranged in parallel; an alumina ceramic rod group and a ZTA ceramic rod group are fixed between the two heat-resistant cast iron plates (21); The alumina ceramic rod group comprises a plurality of alumina ceramic rods (22), and the ZTA ceramic rod group comprises a plurality of ZTA ceramic rods (23); the diameter of the alumina ceramic rod (22) is smaller than the diameter of the ZTA ceramic rod (23); The ends of the plurality of alumina ceramic rods (22) connected to the heat-resistant cast iron plate (21) are in the shape of three wavy lines; the ends of the plurality of ZTA ceramic rods (23) connected to the heat-resistant cast iron plate (21) are in the shape of straight lines, and the plurality of ZTA ceramic rods (23) are located between the plurality of alumina ceramic rods (22); The lower end diameter of the alumina ceramic rod (22) is 12 mm, the draft angle is 0.5°, and the length is 110 mm; the lower end diameter of the ZTA ceramic rod (23) is 22 mm, the draft angle is 0.5°, and the length is 110 mm.

2. The ceramic rod assembly-high chromium cast iron composite blow bar according to claim 1, characterized in that: The heat-resistant cast iron plate (21) is high-chromium cast iron.

3. The ceramic rod assembly-high chromium cast iron composite blow bar according to claim 1, characterized in that: The heat-resistant cast iron plate (21) is provided with a fixing hole (211) for connecting with the alumina ceramic rod (22) and the ZTA ceramic rod (23).

4. The ceramic rod assembly-high chromium cast iron composite blow bar according to claim 1, characterized in that: The surface of the alumina ceramic rod (22) is uniformly provided with a plurality of first protrusions (221); the surface of the ZTA ceramic rod (23) is uniformly provided with a plurality of second protrusions (231).

5. The ceramic rod assembly-high chromium cast iron composite blow bar according to claim 1, characterized in that: The size of the heat-resistant cast iron plate (21) is 240 mm*83 mm*2 mm.

6. The ceramic rod assembly-high chromium cast iron composite blow bar according to claim 1, characterized in that: The number of the plate hammer unit assemblies (2) on a single side of the working area of ​​the plate hammer (1) is 5 groups.

7. The ceramic rod assembly-high chromium cast iron composite blow bar according to claim 1, characterized in that: The heat-resistant cast iron plate (21) opposite to the single-side end panel of the plate hammer (1) is embedded in the single-side end panel of the plate hammer (1) and is flush with the plate surface of the heat-resistant cast iron plate (21).

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