A grinding device for biasing a grinding bowl

Abstract

The utility model discloses a kind of grinding device of grinding bowl bias, belong to the technical field of grinding equipment, including grinding bowl, rack, vibration power mechanism and discharge mechanism;The grinding bowl is located above vibration power mechanism, and its below is equipped with discharge mechanism;The vibration power mechanism is used to provide grinding power for the grinding bowl, the rotation axis of the grinding bowl with the vibration power mechanism is parallel and has certain eccentric distance.The utility model compared to original grinding device, research grinding bowl bias, and can directly feed and discharge in height direction, the discharge path of material is shorter, is favorable for improving discharge efficiency, and device structure is relatively simple;Meanwhile, the discharge smoothness of material is better, material is not easy to remain on discharge mechanism, and the loss amount of material discharge can be reduced.

Description

Technical Field

[0001] This utility model mainly relates to the field of grinding device technology, specifically a grinding device with an offset grinding bowl. Background Technology

[0002] Grinding devices are primarily used to pulverize materials through grinding bowls. Traditional grinding devices require manual loading of the sample to be ground into the grinding bowl, covering it with the bowl lid, pressing it onto the pulverizer, starting the pulverizer to begin grinding, and manually removing the grinding bowl after a certain grinding time to clean out the ground sample and bottle it for subsequent analysis. The feeding and discharging processes are quite cumbersome and cannot be adapted to fully automated sample preparation.

[0003] Currently, existing technologies have developed grinding devices suitable for fully automated sample preparation. For example, patent document CN 106076559 B discloses a device for grinding analytical solid particles into powder and automatically discharging the powder. This device includes, from top to bottom, a feed hopper, a grinding bowl, a collection bowl, an eccentric hammer, a flexible coupling, and a motor. This device can automatically discharge the powder during the grinding process, allowing for continuous feeding. Furthermore, the sample discharged from the grinding bowl is connected to the sample bottle via the collection bowl and a flexible hose, preventing sample leakage and environmental pollution, thus greatly improving the working environment. However, due to the presence of the motor and eccentric hammer directly below the grinding bowl, direct discharge in the vertical direction is not possible. Therefore, an inclined guide plate is installed inside the collection bowl to guide the material discharged from the grinding bowl to the side, and a discharge pipe extends to the side outside the collection bowl to collect the discharged material. This discharge method prolongs the material discharge path, resulting in lower discharge efficiency and a more complex device structure. At the same time, the discharge is not smooth enough, and material is more likely to remain on the guide plate and discharge pipe, resulting in relatively large material loss during discharge. Utility Model Content

[0004] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing solutions are too simplistic. It mainly provides a grinding device with an offset grinding bowl to solve the technical problems of long material discharge paths and insufficient discharge smoothness mentioned in the background.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A grinding device with an offset grinding bowl includes a grinding bowl, a frame, a vibration power mechanism, and a discharge mechanism; the grinding bowl is positioned above the vibration power mechanism, and the discharge mechanism is positioned below it. The vibration power mechanism is used to provide grinding power to the grinding bowl, and the grinding bowl is parallel to the rotation axis of the vibration power mechanism and has a certain eccentric distance.

[0006] The vibration power mechanism of the original grinding device is located directly below the grinding bowl, providing vibration power. Under this limitation, the discharge mechanism of the ground material can only be set on the side, discharging the material from the side. However, this utility model places the grinding bowl next to the vibration power mechanism, that is, by offsetting the grinding bowl so that it avoids the obstruction of the vibration power mechanism, so that the discharge mechanism can be set directly below the grinding bowl for discharging. This allows for direct feeding and discharging in the vertical direction, resulting in a shorter material discharge path, which is beneficial to improving discharge efficiency. At the same time, the material discharge is smoother, and less material is left on the discharge mechanism.

[0007] Preferably, the top of the grinding bowl is provided with a feed pipe, and the feed pipe and the discharge mechanism are located on the same vertical axis, so as to better reflect that the grinding bowl can directly feed and discharge materials from top to bottom.

[0008] In one embodiment, the number of grinding bowls is two or more, the vibration power mechanism is located in the middle of the overall device, and all the grinding bowls are evenly distributed around the vibration power mechanism, which can make the overall device maintain a stable center of gravity.

[0009] In another embodiment, the number of grinding bowls is one, the vibration power mechanism is located in the middle of the overall device, the grinding bowl is located on one side of the vibration power mechanism, and a counterweight block matching the weight of the grinding bowl is provided on the opposite side of the vibration power mechanism so that the overall device maintains a stable center of gravity.

[0010] Furthermore, the discharge mechanism includes an outer cover sleeved on the outside of the grinding bowl, and the lower end of the outer cover sleeve is lower than the bottom of the grinding bowl, which can prevent the material after grinding from leaking out and make the material discharged from the grinding bowl uniformly discharged from the lower end of the outer cover sleeve.

[0011] Furthermore, the lower end of the outer casing is connected to a discharge funnel, the cross-section of which gradually decreases in the direction away from the outer casing, which can further collect the ground material and discharge it uniformly.

[0012] Specifically, the bottom of the grinding bowl is provided with a discharge hole; And / or, the side wall of the grinding bowl is provided with a discharge gap, and the number of discharge gaps is not limited to one.

[0013] Specifically, a mounting base is fixed on the frame, and a manufacturing table is connected above the mounting base by a spring support. The grinding bowl is detachably mounted on the manufacturing table.

[0014] Furthermore, the vibration power mechanism includes a motor and an eccentric hammer. The output shaft of the motor is connected to a rotating shaft via a coupling. The eccentric hammer is mounted on the rotating shaft. During the rotation of the eccentric hammer, it acts on the manufacturing table and causes it to vibrate, thereby driving the grinding bowl to vibrate.

[0015] Furthermore, the eccentric hammer is disposed within the first protective housing, which is installed at the center of the lower end face of the manufacturing table; the coupling is disposed within the second protective housing, which is installed at the bottom of the first protective housing.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention places the grinding bowl next to the vibration power mechanism, thus avoiding obstruction by the vibration power mechanism. The discharge port of the discharge mechanism is located directly below the grinding bowl. During the grinding process, the ground material can automatically pass through the discharge mechanism under gravity and be discharged. It can also directly feed and discharge in the vertical direction, resulting in a shorter material discharge path, which helps to improve discharge efficiency. The device structure is also relatively simple. At the same time, the material discharge is smooth, and it is not easy for material to remain on the discharge mechanism, which can reduce the amount of material loss during discharge.

[0017] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of one embodiment of the present invention; Figure 2 This is a front view of one embodiment of the present invention; Figure 3 This is a longitudinal sectional view of one embodiment of the present invention without the grinding bowl installed; Figure 4 This is a longitudinal sectional view of the grinding bowl in this utility model; Figure 5 This is a three-dimensional structural diagram of a manufacturing platform according to another embodiment of the present invention.

[0019] Reference numerals: 1. Grinding bowl; 11. Grinding chamber cover plate; 12. Feed pipe; 13. Grinding chamber bottom plate; 14. Screen cover plate; 15. Grinding hammer; 16. Screen; 17. Grinding ring; 18. Grinding chamber side wall; 2. Manufacturing table; 21. Installation port; 3. Outer cover; 4. Discharge funnel; 5. Motor; 6. First protective shell; 61. Eccentric hammer; 7. Spring; 8. Mounting base; 81. First clearance port; 82. Second clearance port; 9. Second protective shell; 91. Coupling; 10. Counterweight. Detailed Implementation

[0020] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] Example: Please refer to the appendix for details. Figure 1 -Appendix Figure 4 A grinding device with an offset grinding bowl includes a grinding bowl 1, a frame, a vibration power mechanism, and a discharge mechanism. The grinding bowl 1 is located above the vibration power mechanism, and the discharge mechanism is located below it. The vibration power mechanism is used to provide grinding power to the grinding bowl 1. The grinding bowl 1 is parallel to the rotation axis of the vibration power mechanism and has a certain eccentric distance.

[0024] The vibration power mechanism includes a motor 5 and an eccentric hammer 61. The output shaft of the motor 5 is connected to a rotating shaft through a coupling 91. The eccentric hammer 61 is mounted on the rotating shaft. During the rotation of the eccentric hammer 61, it acts on the manufacturing table 2 and causes it to vibrate, thereby driving the grinding bowl 1 to vibrate.

[0025] Furthermore, the aforementioned grinding device includes a mounting base 8, a manufacturing table 2, a first protective housing 6, a second protective housing 9, a motor 5, an outer cover cylinder 3, a discharge funnel 4, and a grinding bowl 1, specifically: Mounting base 8 is fixedly mounted on the ground by a frame to provide a stable mounting platform. A first clearance opening 81 is provided on mounting base 8 directly below the grinding bowl 1, allowing the discharge funnel 4 to extend below mounting base 8 for discharge. A second clearance opening 82 is provided in the middle of mounting base 8 for the second protective housing 9 to pass through.

[0026] The manufacturing platform 2 is located directly above the mounting base 8, and is connected to the mounting base 8 via a spring 7 to assist in achieving better vibration of the manufacturing platform 2. The manufacturing platform 2 has a mounting opening 21 for mounting the grinding bowl 1, so that the grinding bowl 1 can be hung on the manufacturing platform 2 and fixedly connected by bolts.

[0027] The first protective housing 6 is fixedly installed in the lower middle part of the manufacturing table 2 by bolts. The first protective housing 6 is provided with a vertically arranged rotating shaft, and an eccentric hammer 61 is installed on the rotating shaft to drive the manufacturing table 2 to vibrate.

[0028] The second protective housing 9 is fixedly installed below the first protective housing 6 by bolts. The second protective housing 9 extends through the second clearance opening 82 to the bottom of the mounting base 8. The top of the second protective housing 9 is connected to the bottom of the first protective housing 6. The second protective housing 9 is provided with a coupling 91 for mounting on the output shaft of the motor 5, and the rotating shaft in the first protective housing 6 extends into the second protective housing 9 and is connected to the coupling 91.

[0029] The motor 5 is vertically arranged below the second protective housing 9. The motor 5 is mounted on the frame. The output shaft of the motor 5 extends upward into the second protective housing 9 and is connected to the coupling 91 to provide driving force to drive the rotating shaft to rotate.

[0030] The outer cover 3 is fixed on the lower end face of the manufacturing table 2, and the outer cover 3 is installed directly below the installation port 21. The inner diameter of the outer cover 3 is not less than the diameter of the installation port 21, so that the grinding bowl 1 can be placed inside the outer cover 3.

[0031] The discharge funnel 4 is fixed to the bottom of the outer cover cylinder 3 by bolts, and a rubber plate is provided between the contact surfaces of the outer cover cylinder 3 and the discharge funnel 4; the outer cover cylinder 3 is connected to the discharge funnel 4; the lower end of the discharge funnel 4 extends through the first clearance opening 81 to the bottom of the mounting base 8 to facilitate discharge and collection.

[0032] The grinding bowl 1 is detachably installed in the mounting opening 21 of the manufacturing table 2, and its main body is placed inside the outer cover cylinder 3. The lower end of the outer cover cylinder 3 is lower than the bottom of the grinding bowl 1. A felt is provided between the grinding chamber cover plate 11 of the grinding bowl 1 and the manufacturing table 2. The bottom of the grinding bowl 1 is provided with a screening component for controlling the output particle size. The screening component has a screen hole that connects to the grinding chamber. The grinding chamber is provided with a grinding hammer 15 and a grinding ring 17, and the grinding ring 17 is sleeved on the outside of the grinding hammer 15. A feed pipe 12 that connects to the grinding chamber is installed on the grinding chamber cover plate 11 for feeding.

[0033] When the above-mentioned grinding device is used, the motor 5 is started, which drives the eccentric hammer 61 to rotate and act on the manufacturing table 2. With the elasticity and reset effect of the spring 7, the manufacturing table 2 vibrates, which drives the grinding bowl 1 to vibrate. The grinding hammer 15 and the grinding ring 17 in the grinding chamber collide with the side wall 18 of the grinding chamber to crush (grind) the material. During the grinding process, the material with a particle size within the sieve hole diameter can automatically pass through the sieve plate under the action of gravity, enter the outer cover cylinder 3, and be discharged through the discharge funnel 4.

[0034] In the original grinding device, the grinding bowl 1 is located directly above the motor, making it impossible to discharge material directly below the grinding bowl 1. However, in this embodiment, the grinding bowl 1 is placed to the side, offset relative to the vibration power mechanism, avoiding positional interference with the vibration power mechanism. This allows for direct feeding and discharging in the height direction, and the discharge path is shorter, which helps improve discharge efficiency. In addition, the material discharge is smoother, and it is less likely to leave material on the discharge mechanism, which can reduce the amount of material loss during discharge and is more conducive to achieving complete material discharge.

[0035] Furthermore, please refer to the appendix for details. Figure 4 The grinding bowl 1 includes a grinding chamber cover plate 11, a feed pipe 12, a grinding chamber bottom plate 13, a screen cover plate 14, a grinding hammer 15, a screen 16, a grinding ring 17, and a grinding chamber side wall 18. Both the grinding chamber bottom plate 13 and the screen cover plate 14 have openings, and the grinding chamber bottom plate 13 and the screen cover plate 14 clamp the screen 16 and are fixed together by screws to form a screen plate. The grinding chamber side wall 18 is installed below the grinding chamber cover plate 11, and the screen plate is installed at the bottom of the grinding chamber side wall 18. The grinding chamber cover plate 11, the grinding chamber side wall 18, and the screen plate form a grinding chamber.

[0036] Furthermore, please refer to the appendix for details. Figure 4 The grinding chamber bottom plate 13 has a first opening, and the screen cover plate 14 has a second opening. The first and second openings correspond and are aligned to facilitate material passage through the screen 16. The grinding chamber bottom plate 13, screen cover plate 14, and screen 16 overlap and are connected by screws. The lower end face of the grinding chamber bottom plate 13 has evenly spaced threaded blind holes for screws to be screwed in. The screen cover plate 14 has small through holes that correspond to the threaded blind holes. The screw passes through the small through holes from below the screen cover plate 14, then through the edge of the screen 16, and finally screws into the threaded blind holes. This allows for detachable installation of the screen 16, making it easy to replace the screen 16 with the appropriate size according to the target particle size. At the same time, the grinding chamber bottom plate 13 contacts the grinding hammer 15 and the grinding ring 17, and there is a gap between the screen 16 and the grinding hammer 15 and the grinding ring 17, making the screen 16 less prone to wear.

[0037] In another embodiment, a discharge gap matching the aperture of the screen 16 can be formed on the side wall 18 of the grinding chamber to cooperate with the screen 16 to achieve dual discharge and improve discharge efficiency.

[0038] When a sample with a particle size of 0.2 mm requires a 100% sieve pass rate, but excessively fine particles, such as those below 0.1 mm, cannot be excessively represented, the impact force between the grinding hammer 15 and grinding ring 17 and the side wall 18 of the grinding chamber can be reduced by decreasing the speed of motor 5. This effectively controls the amount of sample below 0.1 mm, preventing the sample fineness from becoming excessively fine. For example, currently, when applying G-value testing to samples, the national standard requires all coal samples with a particle size of 0.2 mm to pass through sieve, with 20% to 35% of the sample being between 0.1 and 0.2 mm (if the sample does not reach this range, such as less than 20%, the detected G-value (caking index) will be too high, and vice versa). The control parameters of motor 5 are reduced to 50 Hz and 1440 rpm. The motor control parameters for different coal types can be determined through testing.

[0039] In some embodiments, please refer to the appendix for details. Figure 1 -Appendix Figure 3 Two grinding bowls 1 are installed on the manufacturing table 2. The two grinding bowls 1 work at the same time, which can improve work efficiency. The two grinding bowls 1 are distributed at equal intervals around the first protective shell 6, so that the whole device can maintain a stable center of gravity.

[0040] In another embodiment, please refer to the appendix for details. Figure 5 A grinding bowl 1 is installed on the manufacturing table 2, and a counterweight 10 is installed on its opposite side to maintain the overall stability of the device. It is understood that multiple grinding bowls 1 and counterweights 10 can be used, as long as they are evenly distributed around the motor to maintain the stability of the overall device.

[0041] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A grinding device with an offset grinding bowl, comprising a grinding bowl (1), a frame, a vibration power mechanism, and a discharge mechanism; characterized in that: The grinding bowl (1) is located above the vibration power mechanism, and a discharge mechanism is located below it; The vibration power mechanism is used to provide grinding power to the grinding bowl (1), and the grinding bowl (1) is parallel to the rotation axis of the vibration power mechanism and has a certain eccentric distance.

2. The grinding device with an offset grinding bowl according to claim 1, characterized in that: The grinding bowl (1) is provided with a feed pipe (12) at the top.

3. The grinding device with an offset grinding bowl according to claim 1, characterized in that: The number of grinding bowls (1) is two or more, the vibration power mechanism is located in the middle of the overall device, and all the grinding bowls (1) are evenly distributed around the vibration power mechanism.

4. A grinding device with an offset grinding bowl according to claim 1, characterized in that: The number of grinding bowls (1) is one. The vibration power mechanism is located in the middle of the whole device. The grinding bowl (1) is located on one side of the vibration power mechanism, and a counterweight (10) matching the weight of the grinding bowl (1) is provided on the opposite side of the vibration power mechanism.

5. A grinding apparatus with an offset grinding bowl according to claim 3 or 4, characterized in that: The discharge mechanism includes an outer cover (3) sleeved on the outside of the grinding bowl (1), and the lower end of the outer cover (3) is lower than the bottom of the grinding bowl (1).

6. A grinding device with an offset grinding bowl according to claim 5, characterized in that: The lower end of the outer casing (3) is connected to a discharge funnel (4), and the cross-section of the discharge funnel (4) gradually decreases in the direction away from the outer casing (3).

7. A grinding device with an offset grinding bowl according to claim 1, characterized in that: The bottom of the grinding bowl (1) is provided with a discharge hole; And / or, the side wall of the grinding bowl (1) is provided with a discharge gap, and the number of discharge gaps is not limited to one.

8. A grinding device with an offset grinding bowl according to claim 1, characterized in that: The frame is fixed with a mounting base (8), and the upper part of the mounting base (8) is connected to the manufacturing table (2) by a spring (7). The grinding bowl (1) is detachably installed on the manufacturing table (2).

9. A grinding device with an offset grinding bowl according to claim 8, characterized in that: The vibration power mechanism includes a motor (5) and an eccentric hammer (61). The output shaft of the motor (5) is connected to a rotating shaft through a coupling (91). The eccentric hammer (61) is mounted on the rotating shaft. During the rotation of the eccentric hammer (61), it acts on the manufacturing table (2) and causes it to vibrate, thereby driving the grinding bowl (1) to vibrate.

10. A grinding device with an offset grinding bowl according to claim 9, characterized in that: The eccentric hammer (61) is located inside the first protective housing (6), which is installed at the center of the lower end face of the manufacturing table (2); the coupling (91) is located inside the second protective housing (9), which is installed at the bottom of the first protective housing (6).

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