CN205323852U - Diameter is less than 2000mm's broken wall of cone sand making machine - Google Patents

Abstract

The utility model relates to a crushing wall of a cone sand making machine with a diameter less than 2000 mm, which can meet the wear-resistant requirements for crushing crushed stones and meet the wear-resistant requirements for crushing sand during the sand making process. The upper part of the crushing wall is Mn13, and the lower part of the crushing wall is high chromium cast iron. Advantages: First, it fundamentally solves the problem of wear on the upper part of the crushing wall caused by different specifications of stones in the sand making process of the crushing wall made of single material (whether it is manganese steel or high chromium cast iron). Small size and heavy wear at the lower part lead to the fatal defect that the crushed sand cavity forms grooves and cannot make sand; the second is that the Mn13 in the upper part of the crushing wall produces the same amount of wear as the crushed stones and the lower part of the high chromium cast iron crushing wall. The wear amount of the sand chamber is relatively consistent, so it fundamentally solves the problem that the lower part of the crushing wall of a single material is crushed during the sand-pressing process, and the groove caused by the wear amount of the lower part of the crushing wall is greater than the wear amount of the upper part of the crushing wall.

Description

Crushing wall of cone sand making machine with diameter less than 2000mm

technical field

The utility model relates to a crushing wall of a cone sand making machine with a diameter less than 2000mm, which can meet the wear-resisting requirements for crushing crushed stones and meet the wear-resisting requirements for crushing sand during the sand making process. It belongs to the manufacturing field of cone sand making machine parts assembly.

Background technique

CN102294280A, titled "High Chromium Crushing Wall and Assembly for Conical Sand Making Machine", it includes the crushing wall assembly, the material of the crushing wall is high chromium white wear-resistant cast iron, and its chromium content is greater than or equal to 9%, equal to or less than 32%. Advantages: First, the wear resistance of the broken wall is greatly improved, and its wear resistance is about 5 times that of the current high manganese steel broken wall. Not only the service life is greatly extended, but the user's use cost is also greatly reduced; The structure improves the impact resistance of the high-chromium white wear-resistant cast iron crushing wall, effectively slows down the impact force on the high-chromium white wear-resistant cast iron crushing wall, and solves the high-chromium white wear-resistant cast iron crushing wall. Defects that are vulnerable to impact. However, because the cone sand making machine has two different working states from stone crushing to sand making in the process of sand making, the upper part of the crushing wall is used for crushing stones, and the stones form impact load and contact on the upper part of the crushing wall. In addition, the stone material and the crushing wall form an indeterminate, not all-contact, impact-extruded gravel cooperation, so the wear state on the upper part of the crushing wall is relatively small; while the lower part of the crushing wall is a crushed sand part, crushing The complete contact and overlapping rolling of the small stones and the crushing wall, the small crushed stones located between the crushing wall and the rolling mortar wall are under the strong rolling of the crushing wall and the crushing wall, and the sand and gravel have a strong impact on the crushing wall (also Including rolling mortar) wear and tear is very serious. If a single material is used to make the crushing wall, whether it is manganese steel or high-chromium cast iron, the wear of the crushing wall is different due to the different sizes of stone materials, resulting in less wear on the upper part of the crushing wall, less wear on the middle part than on the upper part, and less wear on the lower part. The situation of the groove causes the crushing wall to be worn, the feeding speed is slow, the machine current increases, and it is instructed to replace the crushing wall, and the service life of the crushing wall is short.

Utility model content

Design purpose: To avoid the deficiencies in the background technology, to design a cone sand making machine that can not only meet the wear-resistant requirements for crushing gravel, but also meet the wear-resistant requirements for crushing sand during the sand making process. The diameter is less than The 2000mm cone sand making machine crushes the wall.

Design scheme: In order to achieve the above design purpose. In structural design of the utility model: 1, the design that the upper part of the crushing wall is Mn13, and the lower part of the crushing wall is high chromium cast iron is one of technical characteristics of the present utility model. The purpose of this design is: Mn13 is one of the best choices among wear-resistant materials such as strong impact and high-pressure material wear. Under the action of large contact stress, the surface layer of the manganese steel plate Mn13 produces work hardening, and the surface hardness rapidly increases from HB200 to above HB500, and with the gradual wear of the surface hardened layer, new work hardened layers will be continuously formed, resulting in While a steady stream of high wear-resistant surface layer, while the Mn13 inner austenite still maintains good impact toughness. This utility model just utilizes this characteristic of Mn13, and adopts Mn13 in the upper part (or the middle part and the upper part) of the crushing wall. Since the upper part of the crushing wall is used for crushing stones, the impact load formed by the stones on the upper part of the crushing wall is just impact load, so It can harden the surface of the crushing wall and rapidly increase the hardness, which meets the hardness and wear resistance requirements of the upper part of the crushing wall; while the high chromium cast iron can obtain martensite or austenite or secondary cast iron through high alloying and heat treatment. The mixed matrix and the special carbide of chromium, this special carbide is Me, C in the hexagonal crystal system, its hardness is as high as HVl200-1600, it has much higher wear resistance than high manganese steel, and its resistance The abrasiveness is several times that of Mn13, and it also has good high temperature resistance and corrosion resistance. The utility model uses the above-mentioned characteristics of high chromium cast iron as the lower forming material of the broken wall. It not only solves the problems of the background technology In the process of grinding sand, the lower part of the crushing wall wears faster than the upper part of the crushing wall, which causes the lower part of the crushing wall to wear and form grooves, so that the wear amount of the lower part of the crushing wall is formed by the wear amount of the upper part of the crushing wall. Good matching is achieved, which avoids the occurrence of small wear on the upper part of the crushing wall and worn damage on the lower part, which not only greatly prolongs the service life of the crushing wall, but also greatly reduces the use cost of the crushing wall and reduces the cost of sand making . 2. The design that the lower end surface of the upper part of the crushing wall and the upper end face of the lower part of the crushing wall are engaged in an inclined plane is the second technical feature of the present invention. The purpose of this design is: since the lower end surface of the upper part of the crushing wall is an annular outer inclined surface, while the upper end surface of the lower part of the crushing wall is an annular inner inclined surface, and the taper of the two inclined surfaces is the same, so when the upper end surface of the upper part of the crushing wall and the lower surface of the crushing wall When the lower end surface is plugged and contacted by the movable cone, it is equivalent to inserting the upper part of the crushing wall into the lower part of the crushing wall, which not only has good matching, but also is stable and firm.

Technical solution: a crushing wall of a cone sand making machine with a diameter less than 2000mm, the upper part of the crushing wall is made of Mn13, and the lower part of the crushing wall is made of high chromium cast iron.

Compared with the background technology, the utility model fundamentally solves the problem that the crushing wall of a single material (whether it is manganese steel or high chromium cast iron) is different in the sand making process due to different sizes of stones on the crushing wall. The small wear on the upper part of the crushing wall and the large wear on the lower part of the crushing wall resulted in the formation of grooves in the shape of the crushing sand cavity and the fatal defect that sand making cannot be made; the second is the wear amount of Mn13 on the upper part of the crushing wall in the crushed stone and the high chromium The wear amount of the lower part of the cast iron crushing wall is relatively consistent, so it fundamentally solves the problem that the lower part of the crushing wall with a single material is more worn than the upper part of the crushing wall during the sand making process. The situation of the groove not only greatly prolongs the service life of the crushing wall, but also greatly reduces the use cost of the crushing wall and at the same time reduces the cost of sand making.

Description of drawings

Figure 1 is a schematic diagram of the structure of the crushing wall of a cone sand making machine with a diameter of less than 2000 mm.

Fig. 2 is a structural schematic diagram of a broken wall matched with a broken wall.

Fig. 3 is a schematic diagram of the structure of a broken wall made of a single material.

detailed description

Embodiment 1: with reference to accompanying drawing 1-2. A crushing wall of a cone sand making machine with a diameter less than 2000mm, the upper part 1 of the crushing wall is made of Mn13, and the lower part 2 of the crushing wall is made of high chromium cast iron. The lower end surface of the upper part 1 of the crushing wall is an annular outer inclined surface, and the upper end surface of the lower part 2 of the crushing wall is an annular inner inclined surface which coincides with the upper end surface of the upper part 1 of the crushing wall 3 . The height of Mn13 broken wall 1 is greater than that of high chromium cast iron broken wall 2. The material of the Mn13 broken wall is ZGMn13-1, ZGMn13-2, ZGMn13-3, ZGMn13-4, ZGMn13-5. The high chromium cast iron crushing wall material is Cr15 or Cr26. Its manufacturing method: (1) Make the casting mold for the lower part of the crushing wall according to the conventional technology, place the casting mold for the lower part of the crushing wall on the high-frequency vibration platform, and cast the molten high-chromium cast iron until it is broken under the vibration of the high-frequency vibration platform. The lower part of the broken wall is cast in the casting mold, and the lower part of the broken wall is obtained after cooling and demoulding, and then the lower part of the broken wall is heat treated and finished; (2) The upper part of the broken wall is made according to the conventional technology. On the high-frequency vibration platform, under the vibration of the high-frequency vibration platform, the molten high manganese steel is cast into the casting mold on the upper part of the crushing wall. After finishing, the outer inclined surface of the lower end of the upper part of the crushing wall is clamped on the inner inclined surface of the upper end of the lower part of the crushing wall. The height of the broken wall of Mn13 is greater than that of the broken wall 2 of high chromium cast iron. The material of the Mn13 broken wall is ZGMn13-1, ZGMn13-2, ZGMn13-3, ZGMn13-4, ZGMn13-5. The high chromium cast iron crushing wall material is Cr15 or Cr26.

What needs to be understood is: although the above-mentioned embodiments have done more detailed text descriptions to the design ideas of the present utility model, these text descriptions are only simple text descriptions to the design ideas of the present utility model, rather than limitations to the design ideas of the present utility model. Any combination, addition or modification that does not exceed the design concept of the present utility model falls within the protection scope of the present utility model.

Claims (5)

1. a diameter circular cone sand making machine crushing wall less than 2000mm, is characterized in that: the top layer that crushing wall top is Mn13, Mn13 produces hardening for HB500, and crushing wall bottom is rich chromium cast iron。

2. the diameter according to claim 1 circular cone sand making machine crushing wall less than 2000mm, is characterized in that: lower surface, crushing wall top is the outer inclined-plane of annular, and upper surface, crushing wall bottom is the interior inclined-plane of annular and coincide with lower surface, crushing wall top。

3. the diameter according to claim 1 circular cone sand making machine crushing wall less than 2000mm, is characterized in that: Mn13 crushing wall height is more than the height of rich chromium cast iron crushing wall。

4. the diameter according to claim 1 circular cone sand making machine crushing wall less than 2000mm, is characterized in that: the material of Mn13 crushing wall is ZGMn13-1, ZGMn13-2, ZGMn13-3, ZGMn13-4, ZGMn13-5。

5. the diameter according to claim 1 circular cone sand making machine crushing wall less than 2000mm, is characterized in that: rich chromium cast iron crushing wall material is Cr15 or Cr26。