Grinding machine for fine powder sample preparation

Abstract

The utility model discloses a fine powder sample preparation grinder, which comprises a vibration grinding driving device and a cooling anti-oxidation device, the upper end of the vibration grinding driving device is provided with a mounting frame, a grinding outer frame is arranged above the mounting frame, the top of the grinding outer frame is provided with a feed pipe, and the feed pipe is connected with the cooling anti-oxidation device. A discharging pipe is arranged on one side of the outer grinding frame, a cooling anti-oxidation device is arranged on the other side of the outer grinding frame, and a striking ring is arranged in the outer grinding frame. According to the fine powder sample preparation grinding machine, the striking ring and the striking block are additionally arranged, so that two objects collide with each other to grind materials during grinding, the grinding speed and efficiency are improved, the two structures are arranged in the device without connecting points, dead corners and dead points do not exist when the materials are discharged, and material residues are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sample preparation equipment, in particular to a fine powder sample preparation grinder. Background Art

[0002] For example, in the detection of iron concentrate, the material needs to be ground to less than 200 meshes. At present, a vibrating fine powder sample grinder is used in the preparation of such samples. The vibration drive device of the vibrating fine powder sample grinder adopts a motor and an eccentric weight to generate vibration under the action of a spring, and then the interaction between the grinding hammer and the material is used to achieve the purpose of grinding. A fine powder sample automatic preparation system disclosed in Chinese patent CN212524444U is such a device, and its specific structure is disclosed in detail in the document. In actual use by customers, the following problems are found to need to be improved: First, when the material is being ground, the internal fine powder sample grinding mechanism is constantly impacting and grinding. The continuous impact and friction will cause the internal temperature to overheat, thereby affecting the material performance; for example, it will cause the moisture content to decrease, thereby affecting the final test results; second, when grinding lignite materials, because this type of material has a low ignition point, this type of material is prone to spontaneous combustion when it is overheated internally, even if it is not naturally high temperature and it is very easy to cause oxidation of lignite materials; third, the grinding time is long and the efficiency is not high. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the utility model provides a fine powder sample preparation grinder, which solves the problems in the prior art: the inability to grind lignite materials and the easy internal overheating leading to oxidation of the materials.

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a fine powder sample preparation grinder, comprising a vibration grinding drive device 1 and a cooling and anti-oxidation device 2, wherein a mounting frame 3 is arranged at the upper end of the vibration grinding drive device 1, a grinding outer frame 4 is arranged above the mounting frame 3, a feed pipe 5 is arranged at the top of the grinding outer frame 4, a discharge pipe 6 is arranged on one side of the grinding outer frame 4, a cooling and anti-oxidation device 2 is arranged on the other side of the grinding outer frame 4, a striking ring 7 is arranged inside the grinding outer frame 4, a striking block 8 is arranged inside the striking ring 7, the cooling and anti-oxidation device 2 comprises a tee 9, an air pipe 10 and a nitrogen pipe 11, the grinding outer frame 4 comprises a grinding chassis 12, a grinding outer frame 13 and a grinding pressure plate 14, a linear drive device 15 is arranged above the grinding drive device 1, and the vibration grinding drive device is arranged inside the frame.

[0005] Optionally, the linear drive device 15 is disposed inside the mounting frame 3 and connected to the grinding chassis 12 at the top, and the grinding chassis 12 , the grinding outer frame 13 and the grinding pressure plate 14 are assembled inside to form a grinding inner cavity 16 .

[0006] Optionally, the feed pipe 5 and the discharge pipe 6 both pass through the grinding outer frame 4 and extend to the inside of the grinding inner cavity 16 , and a straight travel area is provided between the grinding bottom plate 12 and the grinding outer frame 13 .

[0007] Optionally, a grinding outer frame 13 is disposed above the grinding chassis 11 , and a grinding pressure plate 14 is installed above the grinding outer frame 13 .

[0008] Optionally, the tee 9 passes through the grinding outer frame 4 and extends to the inside of the grinding inner cavity 16, and an air pipe 10 and a nitrogen pipe 11 are respectively installed at the tail of the tee 9, the inside of the air pipe 10 is filled with air, and the inside of the nitrogen pipe 11 is filled with nitrogen.

[0009] The utility model provides a fine powder sample preparation grinding machine, which has the following beneficial effects:

[0010] 1. The fine powder sample grinding machine adds an impact ring and an impact block so that the two objects collide with each other to grind the material, thereby increasing the grinding speed and efficiency. The two structures are arranged inside the device without a connection point, so that there will be no dead corners or dead points when the material is discharged, reducing the residual material, greatly improving the grinding efficiency of the material, and reducing the occurrence of residual material due to incomplete discharge.

[0011] 2. The fine powder sample preparation grinder is equipped with a cooling and anti-oxidation device to reduce the high temperature generated during grinding of lignite materials, thereby preventing the lignite materials from being oxidized and distorted in an overheated environment. The introduction of air gas can quickly discharge the internal materials, preventing cross contamination caused by the residual internal materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model.

[0013] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.

[0014] Figure 3 It is a side structural schematic diagram of the utility model.

[0015] Figure 4 For this utility model Figure 2 Enlarged structural diagram at A in the middle.

[0016] In the figure: 1. Vibration grinding drive device; 2. Cooling and anti-oxidation device; 3. Mounting frame; 4. Grinding outer frame; 5. Feed pipe; 6. Discharge pipe; 7. Impact ring; 8. Impact block; 9. Tee; 10. Air pipe; 11. Nitrogen pipe; 12. Grinding chassis; 13. Grinding outer frame; 14. Grinding pressure plate; 15. Linear drive device; 16. Grinding inner cavity; 17. Frame. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figures 1 to 4 The utility model provides a technical solution: a fine powder sample preparation grinder, comprising a vibration grinding drive device 1 and a cooling and oxidation prevention device 2, a mounting frame 3 is arranged at the upper end of the vibration grinding drive device 1, a grinding outer frame 4 is arranged above the mounting frame 3, a feeding pipe 5 is arranged at the top of the grinding outer frame 4, a discharge pipe 6 is arranged at one side of the grinding outer frame 4, a cooling and oxidation prevention device 2 is arranged at the other side of the grinding outer frame 4, a striking ring 7 is arranged inside the grinding outer frame 4, a striking block 8 is arranged inside the striking ring 7, the cooling and oxidation prevention device 2 comprises a tee 9, an air pipe 10 and a nitrogen pipe 11, the grinding outer frame 4 comprises a grinding chassis 12, a grinding outer frame 13 and a grinding pressing plate 14, a linear driving device 15 is arranged above the grinding drive device 1, and the vibration grinding drive device 1 is arranged inside the frame 17;

[0019] The linear drive device 15 is arranged inside the mounting frame 3 and connected to the grinding chassis 12 at the top. The grinding chassis 12, the grinding outer frame 13 and the grinding pressure plate 14 are assembled inside to form a grinding inner cavity 16. The feed pipe 5 and the discharge pipe 6 both penetrate the grinding outer frame 4 and extend to the inside of the grinding inner cavity 16. A linear travel area is provided between the grinding chassis 12 and the grinding outer frame 13.

[0020] A grinding outer frame 13 is arranged above the grinding chassis 11, a grinding pressing plate 14 is installed above the grinding outer frame 13, a tee 9 penetrates the grinding outer frame 4 and extends to the inside of the grinding inner cavity 16, an air pipe 10 and a nitrogen pipe 11 are respectively installed at the tail of the tee 9, air is passed inside the air pipe 10, and nitrogen is passed inside the nitrogen pipe 11;

[0021] The vibration grinding driving device 1 is an existing technology and mechanism, similar to the principle of a three-dimensional vibration screen, and will not be described in detail here.

[0022] In the utility model, the working steps of the device are as follows:

[0023] 1. Put the material into the feed pipe 5 so that the material falls into the inner part of the grinding outer frame 4. The linear drive device 15 is started to make the grinding base 12 and the grinding outer frame 13 fit together. At this time, the vibration grinding drive device 1 is started to drive the grinding outer frame 4 to swing left and right;

[0024] 2. When the grinding outer frame 4 swings left and right, the striking ring 7 and striking block 8 inside it collide with the grinding outer frame 4, so that the material is rubbed into powder under the impact;

[0025] 3. When grinding lignite materials, nitrogen is input into the cooling and anti-oxidation device 2. Nitrogen has a certain cooling effect, which can reduce the heat generated by the high-speed impact of the striking ring 7 and the striking block 8, thereby preventing the lignite materials from overheating and oxidation. Since the cavity is small, the amount of nitrogen required for cooling is not large, and the nitrogen flow rate is low, so there is no impact on the material. An exhaust pipe with a filter can be installed on the top of the grinding cavity to discharge the nitrogen.

[0026] 4. After grinding is completed, air is input and the linear drive device 15 is separated from the grinding chassis 12, so that air is input into the interior thereof to blow out the material. At this time, the vibration grinding drive device 1 is still in operation to ensure that the material under the striking ring and striking block is completely removed to prevent the internal material from remaining.

[0027] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fine powder sample preparation grinding machine, comprising a vibration grinding drive device (1) and a cooling and anti-oxidation device (2), characterized in that: The upper end of the vibration grinding drive device (1) is provided with a mounting frame (3), a grinding outer frame (4) is provided above the mounting frame (3), a feed pipe (5) is provided at the top of the grinding outer frame (4), a discharge pipe (6) is provided on one side of the grinding outer frame (4), a cooling and anti-oxidation device (2) is provided on the other side of the grinding outer frame (4), a striking ring (7) is provided inside the grinding outer frame (4), a striking block (8) is provided inside the striking ring (7), the cooling and anti-oxidation device (2) comprises a tee (9), an air pipe (10) and a nitrogen pipe (11), the grinding outer frame (4) comprises a grinding bottom plate (12), a grinding outer frame (13) and a grinding pressure plate (14), a linear drive device (15) is provided above the vibration grinding drive device (1), and the vibration grinding drive device (1) is arranged inside a frame (17).

2. A fine powder sample preparation grinder according to claim 1, characterized in that: The linear drive device (15) is arranged inside the mounting frame (3) and connected to the grinding chassis (12) at the top; the grinding chassis (12), the grinding outer frame (13) and the grinding pressure plate (14) are assembled inside the grinding chassis (12) to form a grinding inner cavity (16).

3. A fine powder sample preparation grinder according to claim 1, characterized in that: The feed pipe (5) and the discharge pipe (6) both penetrate the grinding outer frame (4) and extend into the interior of the grinding inner cavity (16); a linear travel area is provided between the grinding bottom plate (12) and the grinding outer frame (13).

4. A fine powder sample preparation grinder according to claim 1, characterized in that: A grinding outer frame (13) is arranged above the grinding bottom plate (12), and a grinding pressure plate (14) is installed above the grinding outer frame (13).

5. A fine powder sample preparation grinder according to claim 1, characterized in that: The tee (9) passes through the grinding outer frame (4) and extends to the interior of the grinding inner cavity (16); an air pipe (10) and a nitrogen pipe (11) are respectively installed at the tail of the tee (9); air flows through the interior of the air pipe (10), and nitrogen flows through the interior of the nitrogen pipe (11).

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