Adjustable spacing pair-roller pulverizer

Abstract

The utility model relates to a technical field of rubbing crusher, disclose a adjustable spacing's pair of roller rubbing crusher, including frame, be provided with at least two groups of press roll subassembly on the frame, each press roll subassembly all are through mounting seat sliding installation on the frame, and mounting seat top is provided with the connecting plate, mounting seat sliding installation is between the connecting plate and the frame close to drive subassembly, still be provided with drive subassembly for driving each press roll subassembly rotation on the frame, and the press roll subassembly both ends away from drive subassembly are connected with buffer subassembly, be provided with the adjusting subassembly of adjusting the relative distance of each press roll subassembly between each press roll subassembly, adjusting subassembly includes adjusting block and rotating lever, form the limiting groove between the adjacent mounting seat, adjusting block is located in the limiting groove, adjusting block sliding installation is on the rotating lever, and rotating lever both ends are rotatably installed on the frame and connecting plate.

Description

Technical Field

[0001] This utility model relates to the field of crusher technology, specifically to an adjustable-gap double-roll crusher. Background Technology

[0002] Double-roll mills are key equipment used in metallurgy, building materials, and chemical industries for processing non-metallic materials, playing an indispensable role in the production processes of slag-iron separators, refractory materials, and ceramic raw materials. They primarily use two counter-rotating pressure rollers to squeeze and shear materials, thereby achieving crushing and grinding. They offer advantages such as simple structure, low energy consumption, and uniform product particle size.

[0003] In existing technical solutions, Chinese Patent Publication No. CN210385995U discloses a double-roll crusher for producing slag-iron separators, whose design focuses on the modularity and maintainability of the pressure rollers. The equipment includes a frame, guide rails, mounting blocks, and a pressure roller assembly consisting of a rotating shaft, roller body, roller skin, baffle, and positioning plate. One pressure roller is fixed, while the other is mounted on a sliding mounting block via a buffer adjustment device including an adjusting screw and adjusting spring, giving it a certain buffering and displacement capacity. The pressure rollers adopt a split design; when a local roller skin wears, the corresponding roller body and roller skin assembly can be replaced individually without replacing the entire pressure roller, which reduces maintenance time and costs to a certain extent.

[0004] However, the aforementioned existing technologies and most widely used double-roll crushers still suffer from a significant drawback: the working gap between their two pressure rollers lacks an effective and convenient adjustment mechanism. While buffer adjustment devices can handle instantaneous impacts from hard objects, they cannot be used to precisely set and stably maintain different crushing gaps to meet the production needs of products with different particle sizes. With long-term operation of the pressure rollers, uniform wear will inevitably occur on the roller surface, leading to a gradual increase in the actual working gap, ultimately affecting the particle size of the crushed product. Because the gap is not adjustable, operators cannot compensate for wear through simple adjustments and can only passively wait for the pressure rollers to wear out and fail before replacing them entirely or carrying out large-scale disassembly and repair. This not only results in high spare parts costs and resource waste but also seriously affects the continuity and economy of production due to frequent and long-term downtime for maintenance. Utility Model Content

[0005] The present invention aims to provide an adjustable-gap double-roll crusher to solve the problem in the prior art that the working distance between the pressure rollers in double-roll crushers cannot be flexibly and precisely adjusted, which leads to the device being unable to effectively compensate for the normal wear of the pressure rollers, and ultimately the performance can only be restored by replacing the entire pressure roller.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An adjustable-gap double-roll crusher includes a frame with at least two sets of pressure roller assemblies mounted on it. Each pressure roller assembly is slidably mounted on the frame via a mounting seat, and a connecting plate is provided on the top of the mounting seat. The frame also has a drive assembly for driving the rotation of each pressure roller assembly. The mounting seat near the drive assembly is slidably mounted between the frame and the connecting plate, and the connection is fixed by a locking member. The two ends of the pressure roller assembly away from the drive assembly are connected to buffer assemblies. An adjustment assembly for adjusting the relative distance between the pressure roller assemblies is provided between each pressure roller assembly. The adjustment assembly includes an adjustment block and a rotating rod. A limit groove is formed between adjacent mounting seats, and the adjustment block is located in the limit groove. The adjustment block is threadedly connected to the rotating rod, and the two ends of the rotating rod are rotatably mounted on the frame and the connecting plate, so that when the rotating rod rotates, the adjustment block can move up and down along the axial direction of the rotating rod, thereby pushing the mounting seat near the drive assembly to move.

[0007] Beneficial effects: 1. By driving the adjusting block to move precisely within the limiting groove via the rotating rod, the mounting base on one side can be directly and smoothly pushed to slide, thereby achieving precise and continuous adjustment of the working gap between the two pressure rollers. This ensures that the particle size of the crushed material can be effectively controlled within a certain range, guaranteeing the quality and consistency of the final product. When the pressure rollers wear out after long-term use, the gap cannot be adjusted, and the pressure rollers must be replaced. This requires stopping the machine for repairs, which increases costs and takes a long time. The design of the adjusting component can readjust the roller gap to ensure that the device can return to its optimal working state, extending the effective service life of the device and reducing maintenance costs and time.

[0008] 2. A buffer assembly is installed on the side away from the drive assembly. When there is too much material fed at once or when uncrushable foreign objects are mixed in, the pressure roller assembly on this side can overcome the spring force under pressure and adaptively yield, widening the roller gap and thus expelling excess pressure. This can effectively prevent the pressure roller from becoming stuck due to excessive material or foreign objects, which would cause the drive assembly to overload and malfunction. It also prevents material or foreign objects from causing rigid impact and damage to the pressure roller assembly and drive assembly, significantly improving the reliability and safety of equipment operation.

[0009] Preferably, as a further improvement, the pressure roller assembly also includes a rotating shaft, a connecting member, and a pressure roller. The rotating shaft is rotatably mounted on a mounting base, and the connecting member and the pressure roller are sequentially sleeved on the outer periphery of the rotating shaft along the radial direction. Both ends of the connecting member are connected to baffles.

[0010] Beneficial effects: The connector, as the connecting component between the pressure roller and the rotating shaft, and axially fixed by baffles, ensures the stability and concentricity of the pressure roller during high-speed rotation, prevents unnecessary axial movement of the pressure roller, ensures smooth operation of the crushing operation, and also helps maintain a constant roller gap, thereby ensuring the uniformity of the crushed particle size. Secondly, the baffles connected to both ends of the connector are close to the sides of the pressure roller, forming an effective physical barrier that prevents the fine material to be crushed from leaking out from both ends of the pressure roller axially, ensuring that the material is effectively guided to the roller gap between the two rollers for crushing, which improves production efficiency and maintains a clean working environment.

[0011] Preferably, as a further improvement, the pressure roller is made of a non-metallic material and has the same strength as the rotating shaft.

[0012] Beneficial effects: The pressure roller is made of a non-metallic material with the same strength as the shaft, which completely avoids the contamination of materials by metal shavings that occurs when using metal pressure rollers during the rolling process. This is especially suitable for industries with extremely high product purity requirements, such as food, pharmaceuticals, and new energy, fundamentally ensuring the cleanliness and safety of the final product. In addition, by following the principle of strength matching, the pressure roller and shaft can work together to bear the working load, avoiding premature local damage caused by differences in strength between components, thereby improving the reliability and service life of the entire transmission system. At the same time, the excellent wear resistance and corrosion resistance of the high-performance non-metallic material itself further ensures the stability of the equipment under long-term operation and low maintenance costs.

[0013] Preferably, as a further improvement, the buffer assembly includes a fixing member, an adjusting rod, and an adjusting spring. The fixing member is fixedly connected to a mounting base away from the drive assembly. One end of the adjusting rod is fixedly connected to a support base provided at the end of the frame, and the other end is left with a gap between it and the fixing member for buffering pressure. The spring is sleeved on the outer periphery of the adjusting rod, and both ends are fixedly connected to the fixing member and the support base, respectively.

[0014] Beneficial effects: When too much material or uncrushable foreign objects fall between the two pressure rollers, the resulting abnormal pressure will push the mounting seat, which is far from the drive end, to compress the adjusting spring. This causes the mounting seat to move along the adjusting rod towards the support seat, thereby instantly widening the roller gap and allowing foreign objects or excess material to pass through. This effectively prevents the equipment from jamming and avoids damage to the pressure rollers, shaft, and drive system from rigid impacts, greatly improving the reliability and safety of the equipment operation. At the same time, the spring can automatically rebound after the pressure is released, driving the mounting seat to reset, ensuring the stability and continuity of the crushing roller gap and avoiding the trouble of frequent manual adjustments required during production interruptions.

[0015] Preferably, as a further improvement, the outer periphery of the pressure roller assembly is provided with a chamber, which includes an upper chamber and a lower chamber. Both the upper and lower chambers are connected to the frame, and the upper chamber is provided with a feed inlet, while the lower chamber is provided with a discharge outlet. The feed inlet and the discharge outlet are located on the same vertical line as the gap between the two pressure rollers.

[0016] Beneficial effects: By precisely aligning the feed inlet, the gap between the two pressure rollers, and the discharge outlet in the vertical direction, the material forms a seamless vertical flow channel under the action of gravity, which greatly optimizes the material flow path. This not only accelerates feeding by gravity and improves production efficiency, but also effectively prevents material from accumulating, blocking, or spilling laterally in the hopper, ensuring the continuity and stability of the crushing process. At the same time, the enclosed hopper structure completely isolates the crushing area, significantly suppressing dust dispersion, ensuring a clean working environment and the health of operators, and reducing raw material loss. In addition, the separate design of the upper and lower hoppers also facilitates daily cleaning, maintenance, and repair of the equipment.

[0017] Preferably, as a further improvement, the frame is provided with a first slide groove, the connecting plate is provided with a second slide groove, the mounting base is slidably connected between the first slide groove and the second slide groove, and the locking member passes through the first slide groove and the second slide groove to lock and fix the mounting base.

[0018] Beneficial effects: The composite guide rail system, consisting of the first slide groove on the frame and the second slide groove on the connecting plate, provides a stable and precise linear movement path for the mounting base, ensuring that the pressure roller assembly connected to it can always maintain correct alignment and parallelism during adjustment, thus laying a solid mechanical foundation for obtaining a uniform crushing roller gap.

[0019] Preferably, as a further improvement, the two sides of the frame extend in the width direction to form support parts, and a protective housing for protecting the connection parts of the drive assembly and the pressure roller assembly is installed on the support parts.

[0020] Beneficial effects: By setting the protective housing as a key connection point between the drive assembly and the pressure roller assembly, it provides all-round physical protection, which can effectively prevent operators from accidentally contacting moving parts, greatly improving the safety of equipment operation. At the same time, it can also prevent dust, debris and other foreign objects from entering the transmission area, keeping the transmission system clean and reducing the risk of abnormal wear and failure caused by contamination. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0022] Figure 2 This is a top view of an embodiment of the present utility model.

[0023] Figure 3This is a cross-sectional view of an embodiment of the present utility model.

[0024] Figure 4 This is a schematic diagram of the mounting base in an embodiment of this utility model.

[0025] The reference numerals in the accompanying drawings include: frame 1, support base 11, support part 12, pressure roller assembly 2, rotating shaft 21, connecting part 22, pressure roller 23, mounting base 3, connecting plate 4, second slide groove 41, drive assembly 5, buffer assembly 6, fixing part 61, adjusting rod 62, adjusting spring 63, adjusting assembly 7, adjusting block 71, rotating rod 72, hopper 8, feed port 81, discharge port 82, and protective shell 9. Detailed Implementation

[0026] The following detailed description illustrates the specific implementation method: The implementation examples are basically as follows Figures 1-4 As shown: This embodiment provides an adjustable-pitch double-roll crusher, including a frame 1, with support portions 12 extending along the width direction on both sides of the frame 1. A protective housing 9 is installed on the support portions 12 to protect the connection between the drive assembly 5 and the pressure roller assembly 2. Figure 3 As shown, at least two sets of pressure roller assemblies 2 are provided on the frame 1. In this embodiment, there are two sets of pressure roller assemblies 2. Each pressure roller assembly 2 is slidably mounted on the frame 1 via a mounting base 3, and a connecting plate 4 is provided on the top of the mounting base 3. Specifically, the pressure roller assembly 2 also includes a rotating shaft 21, a connecting piece 22, and a pressure roller 23. The rotating shaft 21 is rotatably mounted on the mounting base 3. The connecting piece 22 and the pressure roller 23 are sequentially sleeved on the outer periphery of the rotating shaft 21 along the radial direction. Both ends of the connecting piece 22 are connected to baffles. The pressure roller 23 is made of a non-metallic material with a hardness not exceeding that of quartz, such as quartz or ceramic, and the strength of the pressure roller 23 is consistent with the strength of the rotating shaft 21. Specifically, in this embodiment, the pressure roller is made of quartz material. Figure 1 As shown, the outer periphery of the pressure roller assembly 2 is provided with a chamber 8, which includes an upper chamber 8 and a lower chamber 8. Both ends of the upper chamber 8 and the lower chamber 8 are connected to the frame 1 by bolts. The upper chamber 8 is provided with a feed port 81, and the lower chamber 8 is provided with a discharge port 82. The feed port 81 and the discharge port 82 are located on the same vertical line as the gap between the two pressure rollers 23.

[0027] like Figure 2As shown, the frame 1 is also equipped with a drive assembly 5 for driving the rotation of each pressure roller assembly 2. In this embodiment, the drive assembly 5 is a motor, and the motor drives the pressure roller assembly 2 to rotate via belt drive. The mounting base 3 near the drive assembly 5 is slidably installed between the frame 1 and the connecting plate 4, and the connection is fixedly connected by a locking member. Specifically, the frame 1 is provided with a first slide groove, and the connecting plate 4 is provided with a second slide groove 41. The mounting base 3 is slidably connected between the first slide groove and the second slide groove 41, and the locking member passes through the first slide groove and the second slide groove 41 to lock and fix the mounting base 3. In this embodiment, the locking member is a bolt and nut.

[0028] like Figure 4 As shown, the pressure roller assembly 2, which is away from the drive assembly 5, is connected to two ends of a buffer assembly 6. The buffer assembly 6 includes a fixing member 61, an adjusting rod 62, and an adjusting spring 63. The fixing member 61 is fixedly connected to the mounting base 3, which is away from the drive assembly 5. One end of the adjusting rod 62 is fixedly connected to the support base 11 at the end of the frame 1, and the other end is left with a gap between it and the fixing member 61 for buffering pressure. The spring is sleeved on the outer periphery of the adjusting rod 62, and both ends abut against the fixing member 61 and the support base 11, respectively, so that when too much material is fed, the pressure roller assembly 2, which is away from the drive assembly 5, can drive the mounting base 3 to approach the suspended end of the adjusting rod 62 to buffer the pressure caused by too much material.

[0029] like Figure 4 As shown, to prevent wear of the pressure rollers 23 after long-term rolling, which would lead to an increase in the gap between the pressure rollers 23, in this embodiment, an adjustment component 7 is provided between the two sets of pressure roller assemblies 2 to adjust the relative distance between each pressure roller assembly 2, so as to ensure that the gap between the pressure rollers 23 is kept within a certain range. Specifically, the adjustment component 7 includes an adjustment block 71 and a rotating rod 72. In this embodiment, the rotating rod 72 is a lead screw, and the adjustment block 71 is a wedge block. A limit groove is formed between adjacent mounting seats 3. The adjustment block 71 is located in the limit groove. The adjustment block 71 is slidably mounted on the rotating rod 72. The two ends of the rotating rod 72 are rotatably mounted on the frame 1 and the connecting plate 4, so that when the rotating rod 72 rotates, the adjustment block 71 can move up and down along the axial direction of the rotating rod 72, thereby pushing the mounting seat 3 close to the drive assembly 5 to move.

[0030] The operation of the above-mentioned device is as follows: Based on the particle size requirements of the crushed material, the gap between the two pressure rollers 23 is adjusted using the adjusting component 7. Rotating the rotating rod 72 causes the wedge-shaped adjusting block 71 to move axially. Since the adjusting block 71 is located within the limiting groove between adjacent mounting seats 3, its up-and-down movement pushes the mounting seat 3 near the drive component 5 to slide along the first sliding groove on the frame 1 and the second sliding groove 41 on the connecting plate 4, thereby changing the relative distance between the pressure rollers 23 and bringing the gap to the preset range. After adjustment, a locking piece is used to pass through the first and second sliding grooves 41 to lock and fix the mounting seat 3, preventing displacement during operation. Subsequently, the drive component 5 (motor) is started. The motor drives the pressure roller assembly 2 to rotate via belt drive. The pressure rollers 23 are made of quartz material with the same strength as the rotating shaft 21, ensuring a smooth crushing process. Material is fed into the upper chamber 8 through the inlet 81. Since the inlet 81, outlet 82, and the gap between the pressure rollers 23 are on the same vertical line, the material naturally falls between the two pressure rollers 23 and is crushed by the relatively rotating pressure rollers 23. The crushed material is discharged from the outlet 82 of the lower chamber 8. During operation, if too much material is fed, causing a sudden increase in pressure, the buffer component 6 will automatically respond: the pressure roller assembly 2, which is away from the drive assembly 5, is connected to the adjusting rod 62 and the adjusting spring 63 through the fixing part 61. The spring is compressed, causing the mounting base 3 to move towards the suspended end of the adjusting rod 62, thereby buffering the pressure and preventing the equipment from overloading. At this time, the operator can control the feeding speed of the material above according to the degree of spring compression to protect the safety of the equipment. After long-term use, if the pressure rollers 23 wear and the gap becomes larger, the gap can be readjusted again through the adjusting component 7 to maintain the crushing effect and equipment performance.

[0031] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A double-roller pulverizer with adjustable spacing, characterized in that: The device includes a frame on which at least two sets of pressure roller assemblies are mounted. Each pressure roller assembly is slidably mounted on the frame via a mounting base, and a connecting plate is provided on the top of the mounting base. The frame also includes a drive assembly for driving the rotation of each pressure roller assembly. The mounting base near the drive assembly is slidably mounted between the frame and the connecting plate, and the connection is fixed by a locking device. The two ends of the pressure roller assembly away from the drive assembly are connected to buffer assemblies. An adjustment assembly is provided between each pressure roller assembly to adjust the relative distance between the pressure roller assemblies. The adjustment assembly includes an adjustment block and a rotating rod. A limit groove is formed between adjacent mounting bases, and the adjustment block is located in the limit groove. The adjustment block is threaded onto the rotating rod, and the two ends of the rotating rod are rotatably mounted on the frame and the connecting plate, so that when the rotating rod rotates, the adjustment block can move up and down along the axial direction of the rotating rod, thereby pushing the mounting base near the drive assembly to move.

2. The adjustable-gap double-roll crusher according to claim 1, characterized in that: The pressure roller assembly also includes a rotating shaft, a connecting piece, and a pressure roller. The rotating shaft is rotatably mounted on a mounting base, and the connecting piece and the pressure roller are sequentially sleeved on the outer circumference of the rotating shaft along the radial direction. Both ends of the connecting piece are connected to baffles.

3. The adjustable-gap double-roll crusher according to claim 2, characterized in that: The pressure roller is made of non-metallic material and has the same strength as the rotating shaft.

4. The adjustable-gap double-roll crusher according to claim 1, characterized in that: The buffer assembly includes a fixing member, an adjusting rod, and an adjusting spring. The fixing member is fixedly connected to a mounting base away from the drive assembly. One end of the adjusting rod is fixedly connected to a support base at the end of the frame, and the other end is left with a gap between it and the fixing member for buffering pressure. The spring is sleeved on the outer periphery of the adjusting rod, and both ends are fixedly connected to the fixing member and the support base, respectively.

5. The adjustable-gap double-roll crusher according to claim 1, characterized in that: The pressure roller assembly has a chamber on its outer periphery, which includes an upper chamber and a lower chamber. Both the upper and lower chambers are connected to the frame. The upper chamber has a feed inlet, and the lower chamber has a discharge outlet. The feed inlet and discharge outlet are on the same vertical line as the gap between the two pressure rollers.

6. The adjustable-gap double-roll crusher according to claim 5, characterized in that: The frame is provided with a first slide groove, the connecting plate is provided with a second slide groove, the mounting base is slidably connected between the first slide groove and the second slide groove, and the locking member passes through the first slide groove and the second slide groove to lock and fix the mounting base.

7. The adjustable-gap double-roll crusher according to claim 6, characterized in that: The frame extends along its width on both sides to form support sections, and protective housings are installed on the support sections to protect the connection between the drive assembly and the pressure roller assembly.

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