Three-roller grinding device

Abstract

A three-roller grinding device comprises a starting grinding roller, a middle grinding roller, a discharging grinding roller, a trough, a driving mechanism, a discharging scraper groove and a rotary material cleaning mechanism, and the starting grinding roller, the middle grinding roller and the discharging grinding roller are sequentially arranged and connected with the two sides of the trough. The driving end of the driving mechanism is in transmission connection with rotating shafts of the initial grinding roller, the middle grinding roller and the discharging grinding roller so as to drive the initial grinding roller, the middle grinding roller and the discharging grinding roller to rotate, and the discharging scraper groove is located in the tail end of the discharging grinding roller so that slurry on the discharging grinding roller can be scraped to the discharging scraper groove. The rotary material cleaning mechanism is located above the middle grinding roller, the rotary material cleaning mechanism comprises an adjusting support and a high-pressure injection mechanism, one end or two ends of the adjusting support are connected with the trough, the high-pressure injection mechanism is arranged on the adjusting support, the high-pressure injection mechanism faces the middle grinding roller, and the high-pressure injection mechanism can inject high-pressure gas or liquid.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding devices, in particular to a three-roller grinding device. Background Art

[0002] Working principle of three-roll mill: The three-roll mill achieves the grinding effect by squeezing the surfaces of three horizontal rollers against each other and rubbing at different speeds. The three-roll mill is the most effective grinding and dispersing equipment for high-viscosity materials. Conductive slurry needs to be deagglomerated using a three-roll mill. During the grinding process of the three-roll mill, when the middle grinding roller drives the slurry upward, part of the slurry attached to the middle grinding roller will rotate to the starting position as the grinding roller rotates, resulting in repeated grinding, reducing the grinding efficiency of the three-roll mill, and in severe cases, causing blockage of the three-roll mill; at the same time, this part of the slurry attached to the grinding roller will also affect the friction coefficient of the grinding roller surface, thereby affecting the deagglomeration effect of the slurry. In order to reduce the impact of this part of the rotating slurry, a scraper is generally used to scrape off the rotating slurry. For example, the Chinese utility model patent with application number 202123447420.9 and the name of "three-roller grinder" has scrapers installed at the corresponding positions of the three grinding rollers. When the grinding rollers rotate, the scrapers will scrape off the mixed materials attached to the surface of the grinding rollers to make the mixed materials more uniform. However, long-term contact between the scraper or scraper and the grinding roller will change the original friction coefficient of the grinding roller and cause wear on the surface of the grinding roller. The debris generated during the wear process will also increase the impurity content of the slurry, thereby affecting the quality of the product. At the same time, it will also cause the gap between the two grinding rollers to increase, affecting the grinding effect. Summary of the invention

[0003] In view of this, it is necessary to provide a three-roll grinding device that can effectively remove the rotating slurry on the surface of the intermediate grinding roller and has little impact on the grinding roller.

[0004] A three-roll grinding device comprises a starting grinding roller, an intermediate grinding roller, a discharging grinding roller, a material trough, a driving mechanism, a discharging scraper trough, and a rotating material cleaning mechanism. The starting grinding roller, the intermediate grinding roller, and the discharging grinding roller are arranged in sequence and connected to both sides of the material trough. The driving end of the driving mechanism is connected to the rotating shafts of the starting grinding roller, the intermediate grinding roller, and the discharging grinding roller to drive the starting grinding roller, the intermediate grinding roller, and the discharging grinding roller to rotate. The discharging scraper trough is located at the end of the discharging grinding roller to scrape the slurry on the discharging grinding roller onto the discharging scraper trough. The rotating material cleaning mechanism is located above the intermediate grinding roller. The rotating material cleaning mechanism comprises an adjusting bracket and a high-pressure injection mechanism. One end or both ends of the adjusting bracket are connected to the material trough to adjust the distance between the adjusting bracket and the intermediate grinding roller. The high-pressure injection mechanism is arranged on the adjusting bracket. The high-pressure injection mechanism faces the intermediate grinding roller. The high-pressure injection mechanism can spray high-pressure gas or liquid to remove the rotating slurry on the surface of the intermediate grinding roller.

[0005] Preferably, the adjustment bracket includes a telescopic bracket, a rotating bracket, and a servo motor. One end of the telescopic bracket is fixedly connected to the material trough, and the other end of the telescopic bracket is sleeve-connected to the rotating bracket. The telescopic bracket drives the rotating bracket to translate. The rotating shaft of the servo motor is fixedly connected to the rotating bracket to drive the rotating bracket to rotate. The rotating bracket is also fixedly connected to the high-pressure injection mechanism to drive the high-pressure injection mechanism to move.

[0006] Preferably, the high-pressure injection mechanism includes a pneumatic nozzle, an air supply pipe, and an air pump. The pneumatic nozzle is fixedly connected to the rotating bracket. The pneumatic nozzle is provided with a plurality of pneumatic nozzles. The injection direction of the pneumatic nozzles is tangential to the middle grinding roller and opposite to the rotation direction of the middle grinding roller. The air inlet end of the pneumatic nozzle is connected to one end of the air supply pipe, and the other end of the air supply pipe is connected to the air pump.

[0007] Preferably, the air pump is a pulse air pump to provide high-pressure gas intermittently.

[0008] Preferably, the high-pressure spraying mechanism includes a hydraulic nozzle, a liquid pipeline, a water pump, and a liquid storage tank. The hydraulic nozzle is fixedly connected to the rotating bracket. The hydraulic nozzle is provided with a plurality of hydraulic nozzles. The spraying direction of the hydraulic nozzle is tangential to the intermediate grinding roller and opposite to the rotation direction of the intermediate grinding roller. The liquid inlet end of the hydraulic nozzle is connected to one end of the liquid pipeline, and the other end of the liquid pipeline is connected to the liquid outlet of the water pump. The liquid inlet of the water pump is connected to the liquid storage tank through a pipeline. The liquid storage tank contains water or slurry.

[0009] Preferably, the water pump is a pulse pump to intermittently provide high-pressure liquid.

[0010] Beneficial effect: The three-roller grinding device of the utility model is provided with a high-pressure jet mechanism to flush the slurry on the middle grinding roller. The entire flushing process will not contact the middle grinding roller. While removing the rotating slurry on the roller surface, it effectively reduces the wear on the roller surface, extends the service life of the grinding roller, has little effect on the friction coefficient of the roller surface, and improves the grinding quality and effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the three-roller grinding device of the utility model.

[0012] Figure 2 It is a partial structural schematic diagram of a preferred angle of the three-roller grinding device of the utility model.

[0013] Figure 3 It is a partial structural schematic diagram of another preferred angle of the three-roller grinding device of the utility model.

[0014] Figure 4 for Figure 3Schematic diagram of the local structure.

[0015] Figure 5 for Figure 1 Cross-sectional side view.

[0016] In the figure: a three-roll grinding device 10, a starting grinding roller 20, an intermediate grinding roller 30, a discharge grinding roller 40, a material trough 50, a driving mechanism 60, a discharge scraper trough 70, a rotating material cleaning mechanism 80, an adjusting bracket 801, a telescopic bracket 8011, a rotating bracket 8012, a servo motor 8013, a high-pressure injection mechanism 802, and a hydraulic nozzle 8021. DETAILED DESCRIPTION

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Please see Figures 1 to 5 A three-roll grinding device 10 includes a starting grinding roller 20, an intermediate grinding roller 30, a discharging grinding roller 40, a material trough 50, a driving mechanism 60, a discharging scraper trough 70, and a rotary material cleaning mechanism 80. The starting grinding roller 20, the intermediate grinding roller 30, and the discharging grinding roller 40 are sequentially arranged and connected to both sides of the material trough 50. The driving end of the driving mechanism 60 is connected to the rotating shafts of the starting grinding roller 20, the intermediate grinding roller 30, and the discharging grinding roller 40 to drive the starting grinding roller 20, the intermediate grinding roller 30, and the discharging grinding roller 40 to rotate. The discharging scraper trough 70 is located at the discharging grinding roller 40. The end of the discharging grinding roller 40 is scraped onto the discharging scraper trough 70. The rotating material cleaning mechanism 80 is located above the intermediate grinding roller 30. The rotating material cleaning mechanism 80 includes an adjusting bracket 801 and a high-pressure injection mechanism 802. One end or both ends of the adjusting bracket 801 are connected to the material trough 50 to adjust the distance from the intermediate grinding roller 30. The high-pressure injection mechanism 802 is arranged on the adjusting bracket 801. The high-pressure injection mechanism 802 faces the intermediate grinding roller 30. The high-pressure injection mechanism 802 can spray high-pressure gas or liquid to remove the rotating slurry on the surface of the intermediate grinding roller 30.

[0019] The initial grinding roller 20, the intermediate grinding roller 30 and the discharge grinding roller 40 of the utility model are used for grinding slurry.

[0020] The drive mechanism 60 of the utility model is used to provide a power source for the grinding roller. In a preferred embodiment, the drive mechanism 60 is a drive motor. In a preferred embodiment, the drive motor is provided with a reducer. There are multiple transmission connection modes between the drive motor and the grinding roller. For example, the drive motor and the rotating shaft of the grinding roller are respectively provided with transmission gears, and the drive motor and the grinding roller can be meshed and connected, or connected by a chain. For another example, the drive motor and the rotating shaft of the grinding roller are connected by a coupling.

[0021] The rotary material cleaning mechanism 80 of the utility model is used to remove the rotating slurry on the intermediate grinding roller 30. The rotary material cleaning mechanism 80 removes the slurry in a non-contact manner. Compared with contact-type slurry removal methods such as scrapers, the process of removing the slurry will not rigidly contact the roller surface, thereby effectively reducing the wear on the roller surface. In this way, the friction coefficient of the roller surface can be maintained for a longer time, and the slurry separation effect is better. At the same time, when the roller surface wear becomes smaller, the gap between the two grinding rollers is also maintained better accordingly, and will not become larger, thereby achieving a better grinding effect.

[0022] The adjustment bracket 801 of the utility model is used to adjust the position of the high-pressure injection mechanism 802. The high-pressure injection mechanism 802 will generate a large pressure, which may cause the rotating slurry to splash. Therefore, the injection direction should be tangent to the roller surface as much as possible, so that the force can only be directed to the rotating slurry. The height of the high-pressure nozzle is different, and the corresponding injection angle will also change. Therefore, in a preferred embodiment, the adjustment bracket 801 includes a telescopic bracket 8011, a rotating bracket 8012, and a servo motor 8013, one end of the telescopic bracket 8011 is fixedly connected to the material trough 50, and the other end of the telescopic bracket 8011 is sleeve-connected to the rotating bracket 8012, the telescopic bracket 8011 drives the rotating bracket 8012 to translate, the rotating shaft of the servo motor 8013 is fixedly connected to the rotating bracket 8012 to drive the rotating bracket 8012 to rotate, and the rotating bracket 8012 is also fixedly connected to the high-pressure injection mechanism 802 to drive the high-pressure injection mechanism 802 to move.

[0023] The telescopic bracket 8011 is used to adjust the height of the high-pressure spraying mechanism 802 so that it can maintain a good spraying force. The telescopic bracket 8011 can be a hydraulic rod or in the form of a sleeve and a sleeve rod. The sleeve and the sleeve rod can be fixed with bolts or pins, which is relatively conventional and therefore will not be described in detail.

[0024] In a preferred embodiment, the high-pressure injection mechanism 802 includes a pneumatic nozzle, an air supply pipe, and an air pump. The pneumatic nozzle is fixedly connected to the rotating bracket 8012. The pneumatic nozzle is provided with a plurality of pneumatic nozzles. The injection direction of the pneumatic nozzle is tangential to the intermediate grinding roller 30 and opposite to the rotation direction of the intermediate grinding roller 30. The air inlet end of the pneumatic nozzle is connected to one end of the air supply pipe, and the other end of the air supply pipe is connected to the air pump.

[0025] The air pressure nozzle and the rotating bracket 8012 can be fixed by binding, for example, by using a cable tie or a clamp. The air pressure nozzle and the rotating bracket 8012 can also be fixed by clamping, for example, the rotating bracket 8012 is provided with an arc-shaped slot, and the air pressure nozzle is clamped in the arc-shaped slot.

[0026] The rotation of the slurry is generally due to its own viscosity, and it adheres to the roller surface driven by the rotation inertia. Continuously flushing the slurry can generate a reverse force to prevent the slurry from adhering and offset the inertia. Generally, after flushing, the roller surface itself is relatively smooth, and the slurry adhesion effect will be reduced. In order to reduce the flushing energy consumption, in a preferred embodiment, the air pump is a pulse air pump to provide high-pressure gas intermittently. Through the intermittent flushing method, the flushing effect is guaranteed and the flushing energy consumption is reduced.

[0027] In another preferred embodiment, please see Figure 3 and Figure 4 The high-pressure spraying mechanism 802 includes a hydraulic nozzle 8021, a liquid pipeline, a water pump, and a liquid storage tank. The hydraulic nozzle 8021 is fixedly connected to the rotating bracket 8012. The hydraulic nozzle 8021 is provided with a plurality of hydraulic nozzles. The spraying direction of the hydraulic nozzle is tangential to the intermediate grinding roller 30 and opposite to the rotation direction of the intermediate grinding roller 30. The liquid inlet end of the hydraulic nozzle 8021 is connected to one end of the liquid pipeline, and the other end of the liquid pipeline is connected to the liquid outlet of the water pump. The liquid inlet of the water pump is connected to the liquid storage tank through a pipeline, and the liquid storage tank contains water or slurry. It should be noted that the liquid pipeline, water pump, and liquid storage tank are common components in industrial production, and the connection relationship is also relatively conventional, so they are not reflected in the attached drawings. The more important part of the utility model is the positional relationship between the hydraulic nozzle and the grinding roller, and the matching relationship between the hydraulic nozzle and the rotating bracket. Figure 4 The embodiment shows that the hydraulic nozzle is stuck in the rotating bracket, and the rotating bracket is provided with an arc groove to fit the hydraulic nozzle. The rotating bracket is adjusted in angle by a servo motor, and the two sides of the rotating bracket are connected with the telescopic bracket sleeve. The above-mentioned hydraulic injection structure is also applicable to the pneumatic injection method.

[0028] from Figure 5 It can be seen that the nozzle direction of the hydraulic nozzle is tangent to the middle grinding roller. In this way, the rotating slurry can be effectively removed with less impact on the roller surface. Figure 5 The slurry in the figure is just a more vivid illustration. In the actual production process, the slurry is closely attached to the roller surface, and no continuous band feature can be seen. In addition, there is some rotating slurry on the middle grinding roller.

[0029] When flushing by spraying liquid, pure water flushing is preferred. Correspondingly, when preparing the slurry, the concentration should be slightly greater than the concentration of the final product to offset the dilution effect of water on the slurry. If slurry is used for flushing, low-concentration slurry should be used. Low-concentration slurry has less viscosity and better flushing effect.

[0030] Likewise, in a preferred embodiment, the water pump is a pulse pump to intermittently provide high-pressure liquid.

[0031] The above disclosure is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims

1. A three-roll grinding device, characterized in that: The invention comprises a starting grinding roller, an intermediate grinding roller, a discharging grinding roller, a material trough, a driving mechanism, a discharging scraper trough and a rotary material cleaning mechanism. The starting grinding roller, the intermediate grinding roller and the discharging grinding roller are arranged in sequence and connected to both sides of the material trough. The driving end of the driving mechanism is connected to the rotating shafts of the starting grinding roller, the intermediate grinding roller and the discharging grinding roller to drive the starting grinding roller, the intermediate grinding roller and the discharging grinding roller to rotate. The discharging scraper trough is located at the end of the discharging grinding roller to scrape the slurry on the discharging grinding roller onto the discharging scraper trough. The rotary material cleaning mechanism is located above the intermediate grinding roller. The rotary material cleaning mechanism comprises an adjusting bracket and a high-pressure injection mechanism. One end or both ends of the adjusting bracket are connected to the material trough to adjust the distance between the adjusting bracket and the intermediate grinding roller. The high-pressure injection mechanism is arranged on the adjusting bracket. The high-pressure injection mechanism faces the intermediate grinding roller. The high-pressure injection mechanism can spray high-pressure gas or liquid to remove the rotating slurry on the surface of the intermediate grinding roller.

2. The three-roll grinding device according to claim 1, characterized in that: The adjusting bracket includes a telescopic bracket, a rotating bracket, and a servo motor. One end of the telescopic bracket is fixedly connected to the material trough, and the other end of the telescopic bracket is sleeve-connected to the rotating bracket. The telescopic bracket drives the rotating bracket to translate. The rotating shaft of the servo motor is fixedly connected to the rotating bracket to drive the rotating bracket to rotate. The rotating bracket is also fixedly connected to the high-pressure injection mechanism to drive the high-pressure injection mechanism to move.

3. The three-roll grinding device according to claim 2, characterized in that: The high-pressure injection mechanism includes a pneumatic nozzle, an air supply pipeline, and an air pump. The pneumatic nozzle is fixedly connected to the rotating bracket. The pneumatic nozzle is provided with a plurality of pneumatic nozzles. The injection direction of the pneumatic nozzles is tangential to the middle grinding roller and opposite to the rotation direction of the middle grinding roller. The air inlet end of the pneumatic nozzle is connected to one end of the air supply pipeline, and the other end of the air supply pipeline is connected to the air pump.

4. The three-roll grinding device according to claim 3, characterized in that: The air pump is a pulse air pump that provides high-pressure gas intermittently.

5. The three-roll grinding device according to claim 2, characterized in that: The high-pressure injection mechanism includes a hydraulic nozzle, a liquid pipeline, a water pump, and a liquid storage tank. The hydraulic nozzle is fixedly connected to the rotating bracket. The hydraulic nozzle is provided with a plurality of hydraulic nozzles. The injection direction of the hydraulic nozzles is tangential to the middle grinding roller and opposite to the rotation direction of the middle grinding roller. The liquid inlet end of the hydraulic nozzle is connected to one end of the liquid pipeline, and the other end of the liquid pipeline is connected to the liquid outlet of the water pump. The liquid inlet of the water pump is connected to the liquid storage tank through a pipeline. The liquid storage tank contains water or slurry.

6. The three-roll grinding device according to claim 5, characterized in that: The water pump is a pulse pump which provides high-pressure liquid intermittently.

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