Metallurgical test sample grinding device with splash-proof structure

Abstract

The utility model discloses a metallurgical test sample grinding device with a splash-proof structure, which comprises a base, a rack fixedly connected onto the base, a motor fixedly mounted on a top plate of the rack, a driving shaft connected to an output shaft of the motor, and a grinding seat connected to the driving shaft, and is characterized in that a dust collection bin with an open top is fixed on the base; a grinding bin matched with the grinding seat and used for grinding samples is fixed in the dust collecting bin, an upper port of the grinding bin is higher than an upper port of the grinding seat, and an upper port of the dust collecting bin is higher than an upper port of the grinding bin; a filter plate is fixed between the grinding bin and the dust collection bin, the space below the filter plate is a dust collection chamber, and one side of the dust collection chamber is connected with an air pump. The utility model aims to solve the problem that the existing grinding device with an open structure is very easy to generate particle splashing and dust dissipation in the use process.

Description

Technical Field

[0001] This utility model relates to the field of grinding technology, specifically to a metallurgical testing sample grinding device that can effectively reduce sample splashing. Background Technology

[0002] After powder metallurgy products are processed, quality testing and sampling are required. To ensure the accuracy of the test data, the samples need to be ground. Since the sample volume required for testing and analysis is relatively small, manual grinding or a mortar-type grinding device with good grinding effect and low material loss is often used.

[0003] Chinese utility model patent CN209061320U discloses a mortar-type grinding device, including a base, a fixed bracket fixedly connected to the right side of the top of the base, a motor fixedly connected to the surface of the fixed bracket, a rotating shaft fixedly connected to the bottom end of the motor shaft, a mortar pestle movably connected inside the rotating shaft, a grinding head fixedly connected to the bottom of the mortar pestle through the rotating shaft and extending to the outside of the rotating shaft, and a power switch is provided on the left side of the front of the base. This grinding device can replace manual labor and is simple in structure, easy to operate, and inexpensive, making it suitable for laboratory use. However, during the grinding process, the high-speed rotating grinding head collides with the material, easily generating centrifugal-driven particle splashing. Furthermore, the airflow vortex generated by the motor (especially under vertical axis rotation conditions) can carry micron-sized powder to form aerosols. The device lacks a negative pressure dust suction port or air filtration module, causing dust to escape into the laboratory environment, posing a safety hazard. Utility Model Content

[0004] This invention proposes a sample grinding device for metallurgical testing with a splash-proof structure. Its purpose is to solve the problem of particle splashing and dust dispersion that is easily generated during the use of existing open-structure grinding devices.

[0005] The technical solution of this utility model is as follows:

[0006] A metallurgical laboratory sample grinding device with a splash-proof structure includes a base, a frame fixedly connected to the base, an electric motor fixedly mounted on the top plate of the frame, a drive shaft connected to the output shaft of the electric motor, a grinding seat connected to the drive shaft, a dust collection chamber with an open top fixed on the base, a grinding chamber for grinding samples that cooperates with the grinding seat fixed inside the dust collection chamber, the upper port of the grinding chamber being higher than the upper port of the grinding seat, and the upper port of the dust collection chamber being higher than the upper port of the grinding chamber; a filter plate is fixed between the grinding chamber and the dust collection chamber, the space below the filter plate is a dust collection chamber, and an air pump is connected to one side of the dust collection chamber.

[0007] As a further improvement of this utility model, a bushing is slidably sleeved on the drive shaft, and the bushing is fixedly connected to the grinding seat through a connecting rod.

[0008] As a further improvement of this utility model, the bushing is fixedly connected to a linkage plate that can be raised and lowered; the top surface of the linkage plate is provided with an annular guide groove, and two sliders are slidably embedded in the guide groove; an electric push rod is vertically installed on the right side of the motor, the top end of the electric push rod is fixed to the top plate of the frame, and the extended end of the electric push rod is fixed to the slider on the right side; a guide rod is vertically installed on the left side of the motor, and the guide rod slides upward through the top plate of the frame, and the lower end of the guide rod is fixed to the slider on the left side.

[0009] As a further improvement of this utility model, an L-shaped rod extending along the diameter of the linkage disk is fixedly connected to the edge of the linkage disk. The bottom of the vertical part of the L-shaped rod is a hollow tube. A sliding pin is elastically connected inside the tube. A spring is provided between the top of the sliding pin and the top wall of the tube. The spring is always in a compressed state, thereby ensuring that the bottom of the sliding pin can always abut against the filter plate. The filter plate has an upward protrusion along the rotation path of the sliding pin.

[0010] As a further improvement of this utility model, the grinding chamber wall is provided with several through holes.

[0011] Compared with the prior art, the present invention has the following advantages:

[0012] (1) This utility model significantly reduces particle splashing through a double-layer anti-splash design of a high-grinding chamber and a dust collection layer. At the same time, a filter plate is set between the grinding chamber and the dust collection chamber, and with the air pump at the bottom of the dust collection chamber, a negative pressure dust collection chamber is formed at the bottom of the dust collection chamber, which effectively prevents dust from escaping. In addition, the sliding pin periodically taps the filter screen, causing the filter screen to vibrate and shake off the dust attached to the filter plate, preventing the filter plate from clogging and ensuring that the negative pressure dust collection chamber continuously and effectively pumps air.

[0013] (2) This utility model uses a combination of electric push rod and guide rod to control the linkage disk to drive the bushing to rise and fall along the drive shaft to adjust the gap between the grinding seat and the grinding chamber, so as to flexibly adapt to the grinding needs of samples with different particle sizes.

[0014] (3) By evenly distributing multiple through holes on the upper part of the grinding chamber wall, the dust suspended on the top of the grinding chamber is guided to the negative pressure chamber, which further reduces the dust emission rate. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the grinding device according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of the grinding assembly and filter plate in an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the connection between the bushing and the grinding seat in an embodiment of this utility model;

[0018] Figure 4 This is a front sectional view of the grinding device according to an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Base; 2. Dust collection chamber; 3. Filter plate; 4. Grinding chamber; 5. Through hole; 6. Frame; 7. Motor; 8. Drive shaft; 9. Bushing; 10. Connecting rod; 11. Grinding seat; 12. Linkage plate; 13. L-shaped rod; 14. Sliding pin; 15. Spring; 16. Protrusion; 17. Slider; 18. Electric push rod; 19. Guide rod; 20. Air pump. Detailed Implementation

[0021] The technical solution and effects of this utility model will be described in detail below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0022] like Figures 1-4 A sample grinding device for metallurgical testing with a splash-proof structure includes a base 1, a frame 6 fixedly connected to the base 1, a motor 7 fixedly mounted on the top plate of the frame 6, a grinding assembly located below the motor 7, and the motor 7 connected to the drive shaft 8 of the grinding assembly via its output shaft. A grinding seat 11 is connected to the drive shaft 8. A dust collection chamber 2 with an open top is fixedly mounted on the base 1, and a grinding chamber 4, which cooperates with the grinding seat 11 and is used for grinding samples, is fixed inside the dust collection chamber 2. The upper port of the grinding chamber 4 is higher than the upper port of the grinding seat 11, which can effectively prevent sample splashing. The upper port of the dust collection chamber 2 is higher than the upper port of the top surface of the grinding chamber 4, which can further prevent sample splashing. Figure 2 and Figure 4 There is a gap between the periphery of the grinding chamber 4 and the inner wall of the dust collection chamber 2. A filter plate 3 is fixedly connected between the inner wall of the dust collection chamber 2 and the bottom plate of the grinding chamber 4. The space below the filter plate 3 is a dust collection chamber, and an air pump 20 is connected to one side of the dust collection chamber.

[0023] Furthermore, multiple through holes 5 are evenly distributed on the upper part of the grinding chamber 4. Since the cross-section of the through holes 5 is small, the flow rate of gas will increase when passing through the through holes 5, which is conducive to the discharge of dust suspended at the top of the grinding chamber 4.

[0024] In a preferred embodiment of this utility model, the drive shaft 8 is hexagonal and made of stainless steel, and a bushing 9 with a hexagonal inner hole is slidably fitted on it. The lower part of the bushing 9 is fixedly connected to the grinding seat 11 via a connecting rod 10. Figure 3 .

[0025] As a preferred example of this utility model, such as Figure 2 and Figure 4A linkage disk 12 is fixedly connected to the upper part of the bushing 9. The top surface of the linkage disk 12 is provided with an annular guide groove, and two sliders 17 are slidably embedded in the annular guide groove. An electric push rod 18 is vertically installed on the right side of the motor 7. The top end of the electric push rod 18 is fixed to the top plate of the frame 6, and the extended end of the electric push rod 18 is fixed to the slider 17 on the right side. A guide rod 19 is vertically installed on the left side of the motor 7. The guide rod 19 slides upward through the top plate of the frame 6, and the lower end of the guide rod 19 is fixed to the slider 17 on the left side. The gap between the grinding seat 11 and the bottom surface of the grinding chamber 4 is adjusted by adjusting the electric push rod 18 to drive the linkage disk 12 to rise and fall, so as to adapt to different grinding particle size requirements.

[0026] As a preferred example of this utility model, such as Figure 4 An L-shaped rod 13 extending along the diameter of the linkage disc 12 is fixedly connected to the edge of the linkage disc 12. The bottom of the vertical part of the L-shaped rod 13 is a hollow tube, and a sliding pin 14 is elastically connected inside the tube. A spring 15 is provided between the top of the sliding pin 14 and the top wall of the tube, and the spring 15 is always in a compressed state, thereby ensuring that the bottom of the sliding pin 14 can always abut against the filter plate 3. The filter plate 3 has upward protrusions 16 along the rotation path of the sliding pin 14. During the rotation of the L-shaped rod 13, when the sliding pin 14 contacts the protrusion 16, it will be pushed upward by the protrusion 16 and squeeze the spring 15. When the sliding pin 14 separates from the protrusion 16, the sliding pin 14 will pop out downward under the action of the spring 15 and strike the filter plate 3 to make it vibrate, so that the dust attached to it will fall off and enter the chamber at the bottom of the dust collection bin 2 with the airflow, preventing the filter plate 3 from being blocked, thereby ensuring the stability of the negative pressure state.

[0027] The following examples illustrate the usage method of this utility model:

[0028] The metallurgical test sample is placed into the grinding chamber 4. The motor 7 and the vacuum pump 20 are started, and the grinding seat 11 rotates under the drive of the motor 7, working in conjunction with the grinding chamber 4 to grind the sample. Larger particles, due to their greater mass, will collect at the bottom of the grinding chamber 4, while smaller particles are prone to splashing during rotation. The walls of the dust collection chamber 2 and the grinding chamber 4 effectively prevent particle splashing. At the same time, under the action of the vacuum pump 20, a negative pressure zone is formed at the bottom of the dust collection chamber 2. Dust overflowing from the grinding chamber 4 will flow downward with the airflow and enter the bottom of the dust collection chamber 2 through the filter plate 3.

[0029] It should be noted that, as will be apparent to those skilled in the art, this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. The scope of this utility model is defined by the claims rather than the foregoing description.

Claims

1. A sample grinding device for metallurgical testing with a splash-proof structure, comprising a base (1), a frame (6) fixedly connected to the base (1), a motor (7) fixedly mounted on the top plate of the frame (6), a drive shaft (8) connected to the output shaft of the motor (7), and a grinding seat (11) connected to the drive shaft (8), characterized in that: A dust collection chamber (2) with an open top is fixed on the base (1). A grinding chamber (4) for grinding samples is fixed inside the dust collection chamber (2) and cooperates with the grinding seat (11). The upper port of the grinding chamber (4) is higher than the upper port of the grinding seat (11), and the upper port of the dust collection chamber (2) is higher than the upper port of the grinding chamber (4). A filter plate (3) is fixed between the grinding chamber (4) and the dust collection chamber (2). The space below the filter plate (3) is a dust collection chamber. An air pump (20) is connected to one side of the dust collection chamber.

2. The metallurgical laboratory sample grinding device with a splash-proof structure as described in claim 1, characterized in that: A bushing (9) is slidably sleeved on the drive shaft (8), and the bushing (9) is fixedly connected to the grinding seat (11) through a connecting rod (10).

3. The metallurgical laboratory sample grinding device with a splash-proof structure as described in claim 2, characterized in that: The bushing (9) is fixedly connected to a lifting linkage disc (12); the top surface of the linkage disc (12) is provided with an annular guide groove, and two sliders (17) are slidably embedded in the guide groove; an electric push rod (18) is vertically installed on the right side of the motor (7), the top end of the electric push rod (18) is fixed on the top plate of the frame (6), the extended end of the electric push rod (18) is fixed to the slider (17) on the right side, and a guide rod (19) is vertically installed on the left side of the motor (7), the guide rod (19) slides upward through the top plate of the frame (6), and the lower end of the guide rod (19) is fixed to the slider (17) on the left side.

4. The metallurgical laboratory sample grinding device with a splash-proof structure as described in claim 3, characterized in that: An L-shaped rod (13) extending along the diameter of the linkage disc (12) is fixedly connected to the edge of the linkage disc (12). The bottom of the vertical part of the L-shaped rod (13) is a hollow tube. A sliding pin (14) is elastically connected inside the tube. A spring (15) is provided between the top of the sliding pin (14) and the top wall of the tube. The spring (15) is always in a compressed state, thereby ensuring that the bottom of the sliding pin (14) can always abut against the filter plate (3). The filter plate (3) is provided with an upward protrusion (16) along the rotation path of the sliding pin (14).

5. The metallurgical laboratory sample grinding apparatus with a splash-proof structure as described in claim 1, 2, 3, or 4, characterized in that: The grinding chamber (4) has several through holes (5) on its wall.

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