Grinding roller of double-roller type sand making machine

Abstract

The utility model relates to the technical field of roller mills, in particular to a grinding roller of a double-roller type sand making machine, which comprises a grinding roller base and strip-shaped roller skins, a plurality of roller skins are arranged on the periphery of the grinding roller base side by side along the axial direction, the cross section of each roller skin is I-shaped, the upper end width is larger than the middle part width, and the lower end width is larger than the middle part width and smaller than the upper end width. The top surface of the roller skin is arc-shaped, a first wedge-shaped groove matched with the lower end of the roller skin in shape is formed in the outer wall of the grinding roller foundation, a mounting hole is formed perpendicular to the top surface of the roller skin, and the roller skin is fixedly mounted in the wedge-shaped groove through a bolt penetrating through the mounting hole; the multiple roller skins are clamped on the grinding roller base, the maintenance cost is reduced, the roller skins are clamped with the grinding roller base through the first wedge-shaped grooves, the two side end edges of the roller skins are evenly stressed and are not prone to deformation, and the installation holes can be prevented from being blocked by sand and gravel through further arrangement of the blocking caps.

Description

Technical field:

[0001] The utility model relates to the technical field of roller mills, in particular to a grinding roller of a double-roller sand making machine. Background technology:

[0002] The double-roller sand making machine consists of an electric motor, a reducer, a pair of rollers, a transmission belt and other components. The motor drives the grinding roller to rotate, and the stone is squeezed between two parallel grinding rollers and broken into sand particles with smaller particle size. The roller skin of the double-roller sand making machine is a wear-prone part. After a period of use, the roller skin will wear and produce defects. The roller skin wear will directly affect the sand making effect and cause problems such as uneven particle size and abnormal vibration. Usually, the roller skin needs to be repaired by welding after damage occurs, but the material after welding is lower in hardness than the material when the roller skin is cast, and it is more prone to wear. If the roller skin of the entire grinding roller is replaced, the cost is relatively high, which increases the cost of roller machine operation and maintenance. Utility model content:

[0003] The utility model aims to provide a grinding roller for a roller-type sand making machine to solve the problems existing in the prior art.

[0004] The utility model is implemented by the following technical scheme: a roller of a double-roller sand making machine, comprising a roller base and a roller skin, the roller skin is strip-shaped, and a plurality of roller skins are arranged axially side by side on the outer periphery of the roller base, the cross-section of the roller skin is in the shape of an "I", the width of the upper end is greater than the width of the middle part, the width of the lower end is greater than the width of the middle part and less than the width of the upper end, the top surface of the roller skin is arc-shaped, a first wedge-shaped groove matching the shape of the lower end of the roller skin is opened on the outer wall of the roller base, a mounting hole is opened perpendicular to the top surface of the roller skin, and the roller skin is fixedly installed in the first wedge-shaped groove by bolts passing through the mounting hole.

[0005] Furthermore, it also includes a blocking cap, which is installed in the installation hole, and the top surface of the blocking cap is flush with the roller skin.

[0006] Furthermore, the number of the roller skins is 8 or more.

[0007] Furthermore, the length of the roller skin is greater than the length of the grinding roller base, and end covers are symmetrically fixedly installed at both ends of the grinding roller base. The end covers are provided with a second wedge-shaped groove that matches the shape of the lower end of the roller skin.

[0008] The utility model has the advantages that a plurality of roller skins are clamped on the periphery of the grinding roller base, and the corresponding severely worn roller skin can be replaced separately after the roller skin is worn, thereby reducing the maintenance cost; the roller skin is clamped on the grinding roller base through the first wedge-shaped groove, and is fixedly connected to the grinding roller base through the mounting hole on the roller skin, so that the force on both sides of the roller skin is evenly applied and it is not easy to deform; further, a blocking cap is provided to prevent the mounting hole from being blocked by sand and gravel; end covers are fixedly installed on both sides of the grinding roller base to provide support for the roller skin and protect the grinding roller base. Description of the drawings:

[0009] Figure 1 This is a schematic diagram of the overall structure of Example 1.

[0010] Figure 2 This is a schematic diagram of the partial structure of the roller skin and the grinding roller foundation in Example 1.

[0011] Figure 3 This is a schematic diagram of the overall structure of Example 2.

[0012] In the figure: grinding roller base 1, roller skin 2, first wedge-shaped groove 3, mounting hole 4, plugging cap 5, end cover 6, second wedge-shaped groove 7. Specific implementation method:

[0013] The following will be combined with the drawings of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "top", "bottom", "left", "right", "vertical", "horizontal", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0015] Example 1: Figure 1 , Figure 2As shown, a roller of a double-roller sand making machine comprises a roller base 1 and a roller skin 2. The roller skin 2 is strip-shaped. 36 roller skins 2 are arranged side by side along the axial direction on the outer periphery of the roller base 1. In order to reduce the maintenance cost of the roller skin 2, the more roller skins 2 there are, the lower the cost of a single roller skin 2 is. Therefore, the number of roller skins 2 is preferably more than 8; the cross section of the roller skin 2 is in the shape of an "I", the width of the upper end is greater than the width of the middle part, the width of the lower end is greater than the width of the middle part and less than the width of the upper end, the top surface of the roller skin 2 is arc-shaped, and all the roller skins 2 form a cylindrical grinding roller; a first wedge-shaped groove 3 that matches the shape of the lower end of the roller skin 2 is opened on the outer wall of the roller base 1, and the roller skin 2 is fixed to the roller base 1 by clamping the first wedge-shaped groove 3. The cross section of the roller skin 2 is in the shape of an "I", which can make the parts on both sides of the roller skin 2 that are clamped with the first wedge-shaped groove 3 bear uniform force, and can evenly transmit the pressure to the roller during high-speed operation and extrusion. The roller base 1 is not easily deformed; a mounting hole 4 is opened perpendicular to the top surface of the roller skin 2, and the roller skin 2 is fixedly installed in the first wedge-shaped groove 3 by a bolt passing through the mounting hole 4, and the mounting hole 4 is used to prevent the roller skin 2 from slipping along the axial direction of the roller base 1; a plugging cap 5 is installed in the mounting hole 4, and the top surface of the plugging cap 5 is flush with the roller skin 2. The plugging cap 5 is made of polyurethane material and is clamped in the mounting hole 4 by an interference fit, so that it is not easily thrown out during work. The plugging cap 5 prevents impurities from clogging the mounting hole 4; when the worn roller skin 2 needs to be replaced, the bolts in the mounting hole 4 on the corresponding roller skin 2 can be removed, the old roller skin 2 can be pulled out of the first wedge-shaped groove 3, and then the new roller skin 2 can be inserted into the first wedge-shaped groove 3, and the roller maintenance can be completed by fixing it with bolts in the mounting hole 4, which reduces the cost of replacing the roller skin 2 and is easy to operate.

[0016] Example 2: Figure 3As shown, a roller of a double-roller sand making machine has the same overall structure as that of Example 1, except that the length of the roller skin 2 is greater than the length of the roller base 1. Since the roller skin 2 is generally cast from a wear-resistant alloy, the material hardness is relatively high, but it is relatively brittle. The edge of the roller skin 2 is a part of the roller skin 2 that is prone to wear and breakage. In order to prevent the sand and gravel from directly impacting the roller base 1 when the edge of the roller skin 2 breaks and falls off, the length of the roller skin 2 is designed to be greater than the length of the roller base 1. In case of breakage, a portion of the roller skin 2 will remain on the roller base 1 to prevent the sand and gravel from directly impacting the roller base 1. shaped groove 3; at the same time, in order to protect the roller skin 2 extending out of the grinding roller base 1 at both ends, end covers 6 are symmetrically fixedly installed at both ends of the grinding roller base 1, and the end covers 6 are fixedly connected to the grinding roller base 1 by bolts. A second wedge-shaped groove 7 that matches the shape of the lower end of the roller skin 2 is opened on the end cover 6. The end cover 6 can support the roller skin 2 extending out of the two ends of the grinding roller base 1 to prevent the roller skin 2 from deformation and fragmentation. At the same time, the end cover 6 can also protect the two ends of the grinding roller base 1 from wear. The end cover 6 can be directly replaced with spare parts after wear, which further reduces the cost of use and extends the life of the roller of the double-roller sand making machine.

Claims

1. A grinding roller of a double-roller sand making machine, comprising a grinding roller base (1) and a roller skin (2), characterized in that: The roller skin (2) is strip-shaped. A plurality of roller skins (2) are arranged side by side along the axial direction on the outer periphery of the grinding roller base (1). The cross section of the roller skin (2) is in the shape of an "I" character. The width of the upper end is greater than the width of the middle part. The width of the lower end is greater than the width of the middle part and less than the width of the upper end. The top surface of the roller skin (2) is arc-shaped. A first wedge-shaped groove (3) matching the shape of the lower end of the roller skin (2) is opened on the outer wall of the grinding roller base (1). A mounting hole (4) is opened perpendicular to the top surface of the roller skin (2). The roller skin (2) is fixedly installed in the first wedge-shaped groove (3) by means of bolts passing through the mounting hole (4).

2. The grinding roller of a double-roll type sand making machine according to claim 1, characterized in that: It also comprises a blocking cap (5), which is installed in the installation hole (4), and the top surface of the blocking cap (5) is flush with the roller skin (2).

3. The grinding roller of a double-roller sand making machine according to claim 2, characterized in that: The number of the roller skins (2) is more than 8.

4. A grinding roller for a double-roll type sand making machine according to any one of claims 1 to 3, characterized in that: The length of the roller skin (2) is greater than the length of the grinding roller base (1). End covers (6) are symmetrically fixedly installed at both ends of the grinding roller base (1). The end covers (6) are provided with a second wedge-shaped groove (7) that matches the shape of the lower end of the roller skin (2).

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