Wear-resistant roller pair with replaceable roller tooth plate

Abstract

The utility model discloses a wear-resistant roller pair with replaceable roller toothed plates, a plurality of arc-shaped toothed plates are mounted on the outer cylinder wall of a roller cylinder of the roller pair, and each arc-shaped toothed plate comprises a base plate and a plurality of S-shaped teeth fixed on the base plate; the base plate is detachably arranged on the roller, and the bottom of the base plate is tightly connected with the roller; the S-shaped teeth on each roller body are parallel to each other, and the S-shaped teeth on the two roller bodies are arranged in a staggered mode. The arc-shaped toothed plate is detachable, only the abraded arc-shaped toothed plate can be replaced according to the actual use condition on site, other arc-shaped toothed plates do not need to be replaced, the roller cannot be abraded, the maintenance time and cost are saved, the shutdown and production halt time is shortened, the abrasion resistance of the roller is improved, and the service life is prolonged. The S-shaped teeth are arranged on the arc-shaped toothed plate, materials cannot directly slide downwards when entering the S-shaped teeth, the retention time is prolonged, the materials can be better meshed, and the crushing efficiency can be improved on the premise that the operation parameters of the whole machine are not changed.

Description

Technical field:

[0001] The utility model belongs to the technical field of roller machines, and in particular relates to a pair of wear-resistant rollers with replaceable roller tooth plates. Background technology:

[0002] The roller sand making machine is a kind of equipment used to crush hard materials. It is composed of a motor, a reducer, a roller, a transmission belt and other parts. The motor drives the roller to rotate. The material is subjected to the meshing force of the rotating roller, so that the material is forced to pass between the two rollers. At the same time, it is squeezed and sheared by the rollers, and the material begins to break. The broken small particles follow the tangent of the roller rotation, pass through the gap between the two rollers, and are thrown to the bottom of the machine. The large particles that exceed the gap continue to be broken into small particles and discharged. The roller sand making machine has a wide range of crushing power adjustment, which can improve the crushing efficiency of the material, so that it can effectively meet the requirements of various customers for crushing degree.

[0003] But the rollers of the roller sand making machine are Figure 1 As shown in the figure, it includes a roller shaft, a roller sleeved on the roller shaft, and a roller skin sleeved on the roller. The material is crushed only by meshing and grinding between the rollers. The roller skin is a wearable part. The wear of the roller skin will directly affect the sand making effect, causing problems such as uneven particle size. Therefore, long-term operation requires regular inspection and repair or timely replacement of the roller skin. At present, two methods are commonly used. One is to rely on daily maintenance time for surfacing, but the effect of the repair welding will not be very good, uneven, and the particle size of the output will also be uneven; the other is to directly replace the roller skin, that is, remove the connection between the separation roller and the equipment, drag out all the roller skins, and then cover the newly manufactured roller skins. However, this method takes too long, affects production efficiency, and requires additional labor when replacing the roller skin, which is time-consuming and labor-intensive. Utility model content:

[0004] The utility model aims to provide a pair of wear-resistant rollers with replaceable roller tooth plates. The roller surfaces are provided with detachable S-shaped roller tooth plates, which can improve the wear resistance of the rollers.

[0005] The utility model is implemented by the following technical solution:

[0006] A wear-resistant pair of rollers with replaceable roller tooth plates, comprising two opposite roller bodies, the roller body comprising a roller shaft, a roller sleeved on the roller shaft, a key connection between the roller and the roller shaft, a plurality of arc-shaped tooth plates mounted on the outer cylinder wall of the roller, the arc-shaped tooth plates comprising a base plate and a plurality of S-shaped teeth fixed on the base plate; the base plate is detachably arranged on the roller, the bottom of the base plate is closely connected with the roller; the S-shaped teeth on each roller body are parallel to each other, and the S-shaped teeth on the two roller bodies are arranged in a staggered manner. When the arc-shaped tooth plate is worn, the arc-shaped tooth plate can be removed and replaced with a new one, and the other unworn ones can be left unchanged. For long-term operation, only the arc-shaped tooth plate needs to be replaced, the roller will not wear out, the cost of on-site manual surfacing operation and the downtime time are saved, the cost is saved, and the service life of the roller body is extended; the design of the S-shaped teeth can better bite the material, and can improve the crushing efficiency without changing the operating parameters of the whole machine.

[0007] Preferably, the central angle of the arc-shaped tooth plate is 30°. Experiments have shown that an arc-shaped tooth plate of this size is both easy to replace and durable. Four arc-shaped tooth plates are arranged along the radial direction of the roller.

[0008] Preferably, the base plate is fastened to the roller via a bolt structure.

[0009] Preferably, the thickness of the S-shaped teeth is 10 mm; the spacing between the adjacent S-shaped teeth along the radial direction of the roller is 24×12 mm. The teeth are arranged to be S-shaped, so that the material will not slide down directly after entering the S-shaped teeth, and the residence time is increased. The opposite rotation of the two rollers can make the material be squeezed and crushed more finely.

[0010] Beneficial effects of the utility model:

[0011] (1) A detachable arc-shaped tooth plate is provided on the roller. According to the actual use situation on site, only the worn arc-shaped tooth plate can be replaced without replacing other arc-shaped tooth plates. The roller will not be worn. Compared with the surfacing welding or replacement of the entire roller skin in the background technology, it saves maintenance time and cost, shortens the downtime, improves the wear resistance of the roller, and extends the service life.

[0012] (2) S-shaped teeth are set on the arc-shaped tooth plate. The material will not slide down directly after entering the S-shaped teeth, which increases the residence time and can better bite the material. The crushing efficiency can be improved without changing the operating parameters of the whole machine. Description of the drawings:

[0013] In order to more clearly illustrate the embodiments of the utility model 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 some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of a pair of rollers in the background technology;

[0015] Figure 2 It is a front view schematic diagram of a wear-resistant pair of rollers with replaceable roller tooth plates in the embodiment;

[0016] Figure 3 This is a schematic diagram of the structure of an arc-shaped tooth plate in the embodiment;

[0017] Figure 4 A schematic top view of a wear-resistant pair of rollers with replaceable roller tooth plates in an embodiment;

[0018] Figure 5 It is a partial schematic diagram of the staggered arrangement of S-shaped teeth on two roller bodies in the embodiment.

[0019] The accompanying drawings are as follows:

[0020] 1. Roller shaft; 2. Roller; 3. Roller skin; 4. Bearing seat; 5. Arc tooth plate; 51. Base plate; 52. S-shaped tooth; 53. Bolt structure. Specific implementation method:

[0021] The following will be combined with the drawings in the embodiments 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, rather than all of the embodiments. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "middle", "upper", "lower", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] Example

[0023] A wear-resistant pair of rollers with replaceable roller teeth, such as Figure 2As shown, it includes two opposite roller bodies, the roller body includes a roller shaft 1, a roller 2 is sleeved on the roller shaft 1, the roller 2 and the roller shaft 1 are key-connected, and the roller shaft 1 is fixed in the roller sand making machine through a bearing seat 4. Figure 3 , Figure 5 As shown, a plurality of arc-shaped tooth plates 5 are installed on the outer cylinder wall of the roller 2, and the central angle of the arc-shaped tooth plates 5 is 30°. There are 4 arc-shaped tooth plates 5 arranged along the radial direction of the roller 2, that is, 48 ​​arc-shaped tooth plates 5 are installed on the outer cylinder wall of each roller 2 in 12 rows along the circumference of the roller 2 and 4 rows along the radial direction, and a total of 96 arc-shaped tooth plates 5 are installed in a group of roller pairs. The arc-shaped tooth plate 5 includes a base plate 51 and a plurality of S-shaped teeth 52 fixed on the base plate 51; as shown in FIG. Figure 3 As shown, the base plate 51 is fastened to the roller 2 by a bolt structure 53 (including threaded nuts and screws, washers, and nuts), and the bottom of the base plate 51 is tightly connected to the roller 2. Figure 5 As shown, the S-shaped teeth 52 on each roller body are parallel to each other, and the S-shaped teeth 52 on the two roller bodies are arranged alternately; the thickness of the S-shaped teeth 52 is 10 mm, and the spacing between the adjacent S-shaped teeth 52 along the radial direction of the roller 2 is 24×12 mm.

[0024] When making this wear-resistant roller, screw holes are machined on the surface of the original roller 2 of the double-roller sand making machine, and the base plate 51 of each arc-shaped tooth plate 5 is fixed to the roller with 4 M16 hexagon socket screws, and equipped with Nordlock stop washers to effectively prevent the tooth plate from loosening. The nut is equipped with a polyurethane protective cap for easy maintenance and disassembly. The arc-shaped tooth plate 5 is cast with a high-strength wear-resistant alloy. The finished weight of each arc-shaped tooth plate 5 is designed to be 55kg, and the hardness can reach 50-55HRC, and it has excellent impact toughness; the base plate 51 is machined to ensure the fit with the roller 2 to prevent the arc-shaped tooth plate 5 from loosening. The roller body for installing the arc-shaped tooth plate 5 does not need to remove the original roller shaft 1, roller 2, etc., and the modification is relatively small, which is lower than the cost of manufacturing a new double-roller machine. In addition, the overall wear resistance of the wear-resistant roller of the utility model will be increased by 2.5-3 times compared with the original surfacing service life. The arc-shaped tooth plate 5 can be quickly disassembled and assembled. Only the worn arc-shaped tooth plate 5 needs to be replaced, which saves the cost of on-site manual surfacing operations and shortens the downtime and production stoppage time. Under the premise of not changing the operating parameters of the whole machine, the crushing efficiency can be improved.

[0025] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wear-resistant pair of rollers with replaceable roller teeth, comprising two opposite roller bodies, wherein the roller bodies comprise roller shafts, the roller shafts are sleeved with rollers, and the rollers are key-connected to the roller shafts, characterized in that: A plurality of arc-shaped tooth plates are installed on the outer cylinder wall of the roller, and the arc-shaped tooth plates include a base plate and a plurality of S-shaped teeth fixed on the base plate; the base plate is detachably arranged on the roller, and the bottom of the base plate is tightly connected to the roller; the S-shaped teeth on each roller body are parallel to each other, and the S-shaped teeth on two roller bodies are staggered.

2. The wear-resistant pair of rollers with replaceable roller tooth plates according to claim 1, characterized in that: The central angle of the arc-shaped toothed plate is 30°; four arc-shaped toothed plates are arranged along the radial direction of the roller.

3. The wear-resistant pair of rollers with replaceable roller tooth plates according to claim 1, characterized in that: The base plate is fastened to the roller via a bolt structure.

4. The wear-resistant pair of rollers with replaceable roller tooth plates according to claim 1, characterized in that: The thickness of the S-shaped teeth is 10 mm; the spacing between the S-shaped teeth adjacent to each other in the radial direction of the roller is 24×12 mm.

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