Small-speed-difference double-roller sand making machine

Abstract

The utility model discloses a small-speed-difference double-roller sand making machine. The small-speed-difference double-roller sand making machine comprises a rack, the movable frame is mounted on the rack in a sliding manner; the fixed roller assembly is fixed on the rack and comprises a first driving source and a fixed roller linked with the first driving source; the movable roller assembly is fixed above the movable frame and comprises a second driving source and a movable roller linked with the second driving source; the oil cylinder spring assembly is mounted on the rack and arranged on one side of the movable roller assembly; the double-roller sand making machine has a working state, in the working state, the movable roller and the fixed roller rotate in opposite directions, and a speed difference exists between the linear speed of the movable roller and the linear speed of the fixed roller. After the softer limestone is crushed in the crushing cavity channel, the proportion of powder close to 0mm is relatively reduced, the particle size distribution and the product yield in artificial sand making are changed, and meanwhile, the discharging is smooth.

Description

Technical Field

[0001] This utility model relates to the field of crusher equipment technology, and in particular to a low-speed differential double-roller sand making machine. Background Technology

[0002] The double-roll crusher is a simple, energy-efficient, and high-performance sand making machine that is now widely used in mining, building materials and other industries. Its core working principle is that two rollers rotate in opposite directions at a certain speed under the drive of a motor and reducer, crushing materials such as limestone into finer particles in the crushing chamber between the two rollers.

[0003] In existing technologies, such as Chinese patent CN202121490155.X, a double-roll crusher for mining is disclosed. In this design, and in other similar double-roll crushers, the linear velocities of the movable and fixed rollers are set to be the same. In practical applications, if the linear velocities of the movable and fixed rollers are the same, the proportion of fine powder components close to 0mm in the artificial sand made from softer limestone will be relatively high, which will further affect the production and performance of concrete. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a low-speed differential double-roller sand making machine.

[0005] The technical solution adopted by this utility model is: a low-speed differential double-roller sand making machine, comprising:

[0006] frame;

[0007] The movable frame is slidably mounted on the frame in the left-right direction;

[0008] A fixed roller assembly is fixedly mounted on the frame and includes a first drive source and a fixed roller that is linked to the first drive source.

[0009] The movable roller assembly is fixedly installed above the movable frame and includes a second drive source and a movable roller linked to the second drive source. A crushing chamber for sand and gravel to pass through is provided between the movable roller and the fixed roller.

[0010] The hydraulic cylinder spring assembly is mounted on the frame and abuts against one side of the movable roller assembly;

[0011] The double-roll sand making machine has a working state. In the working state, the movable roller and the fixed roller rotate towards each other, and there is a speed difference between the linear velocity of the movable roller and the linear velocity of the fixed roller.

[0012] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0013] Preferably, the difference between the linear velocity of the movable roller and the linear velocity of the fixed roller is no greater than 5%.

[0014] Preferably, the first drive source includes a first motor and a first reducer, a first coupling is provided between the first motor and the first reducer, and a second coupling is provided between the first reducer and the fixed roller;

[0015] The second drive source includes a second motor and a second reducer, a third coupling is provided between the second motor and the second reducer, and a fourth coupling is provided between the second reducer and the movable roller.

[0016] Preferably, the first motor and the second motor have the same rotational speed, the fixed roller and the movable roller have the same diameter, the first reducer and the second reducer have different speed ratios, and the speed ratio difference is no greater than 5%.

[0017] Preferably, the first motor and the second motor have the same rotational speed, the first reducer and the second reducer have the same speed ratio, and the fixed roller and the movable roller have a diameter difference, which is no more than 5%.

[0018] Preferably, the first reducer and the reducer have the same speed ratio, the fixed roller and the movable roller have the same diameter, and the first motor and the second motor have a speed difference between their output speeds controlled by frequency converters, and the speed difference is not greater than 5%.

[0019] More preferably, the frame is provided with a feed inlet and a discharge outlet, the feed inlet being located above the crushing chamber and the discharge outlet being located below the crushing chamber.

[0020] Compared with the prior art, this utility model has the following beneficial effects:

[0021] In the process of artificially making sand from softer limestone using a roller mill, by controlling any one of the following three factors—the output speed of the first and second motors, the speed ratio of the first and second reducers, and the diameters of the fixed and movable rollers—while keeping the other two the same, a speed difference can be created between the linear velocities of the fixed and movable rollers. This speed difference is controlled to be no greater than 5%. During the sand-making process, due to the difference in linear velocities between the fixed and movable rollers, the proportion of near-0mm powder in the crushing chamber of the softer limestone will be relatively reduced, thus changing the particle size distribution in the artificial sand-making process. This also makes the discharge smoother and more practical. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic cross-sectional view of the double-roll crusher from the upper side in one embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the front view structure of a double-roll sand making machine in one embodiment of this application.

[0025] The components in the attached diagram are labeled as follows: 1-frame, 102-feed inlet, 103-discharge outlet, 2-movable frame, 3-fixed roller assembly, 301-first motor, 302-first coupling, 303-first reducer, 304-second coupling, 305-fixed roller, 4-movable roller assembly, 401-second motor, 402-third coupling, 403-second reducer, 404-fourth coupling, 405-movable roller, 5-cylinder spring assembly.

[0026] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0029] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0030] Detailed implementation plan: See below Figures 1-2 This utility model is a low-speed differential double-roller sand making machine, comprising:

[0031] Rack 1;

[0032] The movable frame 2 is slidably mounted on the frame 1 in the left-right direction;

[0033] The fixed roller assembly 3 is fixedly installed on the frame 1 and includes a first drive source and a fixed roller 305 that is linked to the first drive source;

[0034] The movable roller assembly 4 is fixedly installed above the movable frame 2, and includes a second drive source and a movable roller 405 linked to the second drive source. A crushing chamber for sand and gravel to pass through is provided between the movable roller 405 and the fixed roller 305.

[0035] The hydraulic cylinder spring assembly 5 is mounted on the frame 1 and abuts against one side of the movable roller assembly 4;

[0036] The double-roll crusher has a working state. In the working state, the movable roller 405 and the fixed roller 305 rotate towards each other, and there is a speed difference between the linear speed of the movable roller 405 and the linear speed of the fixed roller 305.

[0037] Please see Figure 2As can be seen, in this embodiment, the movable frame 2 is slidably mounted on the frame 1 in the left-right direction and is driven to reset by the hydraulic cylinder spring assembly 5. Here, the hydraulic cylinder spring assembly 5 is provided to maintain a preset gap between the fixed roller 305 and the movable roller 405 through a predetermined elastic force. When the crushed stone enters the crushing chamber, the spring allows the fixed roller 305 and the movable roller 405 to elastically separate within a certain range, avoiding hard collisions that could damage the equipment. In addition, the hydraulic cylinder spring assembly 5 also has the application effects of overload protection, buffering and shock absorption, and maintaining dynamic pressure between the rollers.

[0038] In a preferred embodiment of this invention, the difference between the linear velocity of the movable roller 405 and the linear velocity of the fixed roller 305 is no greater than 5%.

[0039] Then, please see Figure 1 As can be seen, in this embodiment, the first driving source includes a first motor 301 and a first reducer 303, a first coupling 302 is provided between the first motor 301 and the first reducer 303, and a second coupling 304 is provided between the first reducer 303 and the fixed roller 305.

[0040] The second drive source includes a second motor 401 and a second reducer 403. A third coupling 402 is provided between the second motor 401 and the second reducer 403, and a fourth coupling 404 is provided between the second reducer 403 and the movable roller 405.

[0041] In this embodiment, the first coupling 302 and the third coupling 402 are both universal couplings, and the second coupling 304 and the fourth coupling 404 are both pin couplings. The application of couplings is prior art and will not be elaborated on here.

[0042] The driving principle of the fixed roller 305: The first motor drives the first reducer 303 to work through the first coupling 302. After the first reducer 303 adjusts the speed and the torque of the output shaft, it drives the fixed roller 305 to rotate through the second coupling 304.

[0043] The driving principle of the movable roller 405: The second motor drives the second reducer 403 through the third coupling 402. After the second reducer 403 adjusts the speed and the torque of the output shaft, it drives the movable roller 405 to rotate through the fourth coupling 404.

[0044] The following explains three methods for controlling the difference between the linear speed of the movable roller 405 and the linear speed of the fixed roller 305 to be no more than 5%:

[0045] The first method: the first motor 301 and the second motor 401 have the same rotation speed, the fixed roller 305 and the movable roller 405 have the same diameter, and the first reducer 303 and the second reducer 403 have different speed ratios, with the speed ratio difference not exceeding 5%.

[0046] The second method: the first motor 301 and the second motor 401 have the same rotation speed, the first reducer 303 and the second reducer 403 have the same speed ratio, and the fixed roller 305 and the movable roller 405 have a diameter difference, and the diameter difference is not greater than 5%.

[0047] The third method: the first reducer 303 and the reducer have the same speed ratio, the fixed roller 305 and the movable roller 405 have the same diameter, and the first motor 301 and the second motor 401 have a speed difference between their output speeds controlled by frequency converters, and the speed difference is not greater than 5%.

[0048] As can be seen from the above, there are three factors affecting the linear speed of the movable roller 405 and the fixed roller 305: the rotational speeds of the first motor 301 and the second motor 401, the diameters of the fixed roller 305 and the movable roller 405, and the speed ratio of the first reducer 303 and the second reducer 403. Therefore, by controlling two of these three influencing factors to be the same and the other to be different, a certain speed difference can be maintained between the linear speeds of the movable roller 405 and the fixed roller 305.

[0049] Note that in this embodiment, the difference between the linear velocity of the movable roller 405 and the linear velocity of the fixed roller 305 is controlled to be no more than 5%. This ensures that the proportion of powder with a diameter close to 0 mm will be relatively reduced during the crushing of softer limestone, which changes the particle size distribution in artificial sand making and makes the discharge smoother.

[0050] Note that if the difference between the linear velocity of the movable roller 405 and the linear velocity of the fixed roller 305 is greater than 5%, it will affect the degree of crushing of the artificial sand, and thus affect the particle size distribution of the artificial sand and the output of the finished product.

[0051] For more details, please see Figure 2 As can be seen, in this embodiment, the frame 1 is provided with a feed inlet 102 and a discharge outlet 103. The feed inlet 102 is located above the crushing chamber, and the discharge outlet 103 is located below the crushing chamber.

[0052] The above description of a low-speed differential double-roller sand making machine of this utility model is only a preferred embodiment of this utility model and does not limit the patent scope of this utility model. All equivalent structural transformations made under the inventive concept of this utility model using the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A low speed difference pair roller sand making machine, comprising: a frame; a movable frame slidingly installed on the frame in left and right directions; a fixed pair roller assembly fixedly installed on the frame and comprising a first driving source and a fixed roller linked to the first driving source; a movable pair roller assembly fixedly installed above the movable frame and comprising a second driving source and a movable roller linked to the second driving source, a crushing cavity for sand and stone passing being provided between the movable roller and the fixed roller; a cylinder spring assembly installed on the frame and abutting against one side of the movable pair roller assembly; characterized in that the pair roller sand making machine has a working state in which the movable roller and the fixed roller rotate towards each other, and a speed difference between the linear speed of the movable roller and the linear speed of the fixed roller is not more than 5%; the difference between the linear speed of the movable roller and the linear speed of the fixed roller is not more than 5%; the first driving source comprises a first motor and a first speed reducer, a first coupling is provided between the first motor and the first speed reducer, and a second coupling is provided between the first speed reducer and the fixed roller; the second driving source comprises a second motor and a second speed reducer, a third coupling is provided between the second motor and the second speed reducer, and a fourth coupling is provided between the second speed reducer and the movable roller.

2. A low speed differential pair roller sand mill according to claim 1, characterized in that, The rotational speeds of the first motor and the second motor are the same, the diameters of the fixed roller and the movable roller are the same, the speed ratios of the first speed reducer and the second speed reducer are different, and the difference in speed ratio is not more than 5%.

3. A low speed differential pair roller sand mill as claimed in claim 1, wherein, The rotational speeds of the first motor and the second motor are the same, the speed ratios of the first speed reducer and the second speed reducer are the same, and the diameters of the roller bodies of the fixed roller and the movable roller have a diameter difference, and the diameter difference is not more than 5%.

4. A low-speed-difference pair-roller sand making machine according to claim 1, characterized in that, The speed ratios of the first speed reducer and the second speed reducer are the same, the diameters of the fixed roller and the movable roller are the same, and the rotational speeds of the first motor and the second motor respectively controlled by frequency converters have a rotational speed difference, and the rotational speed difference is not more than 5%.

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