A closed grinding device

Abstract

The grinding device provided by the embodiment of the present application includes a base and a grinding chamber. The base surrounds to form a sealed cavity, and an air extraction port is arranged on the outer surface. The grinding chamber is arranged in the sealed cavity, and grinding chamber air holes are arranged on the outer wall. The outer wall of the grinding chamber and the inner wall of the base are arranged at intervals. The grinding chamber is used to accommodate a flexible grinding cup. When the base is evacuated by a vacuum pump, the air pressure in the base becomes smaller. At this time, the flexible grinding cup begins to gradually expand towards the inner wall of the grinding chamber and finally adheres to the inner wall of the grinding chamber. Then, materials can be placed in the flexible grinding cup, and the materials can be ground by the grinding knife. After grinding, the flexible grinding cup can be directly taken out. When the grinding device is used next time, a new flexible grinding cup can be directly replaced, eliminating the step of cleaning the grinding cup, avoiding the problem of unclean cleaning of the grinding cup, and greatly improving the production efficiency at the same time.

Description

Technical Field

[0001] This application relates to the field of experiments, and particularly to a grinding device. Background Art

[0002] China is a large country in the use of pesticides and veterinary drugs. The levels of pesticide residues in agricultural products and veterinary drug residues in livestock products are related to the food health and safety of the people. When testing agricultural and livestock product samples, sample preparation is required. The first step of sample preparation is grinding, and the grinding effect will directly affect the subsequent homogenization effect and the accuracy of qualitative and quantitative analysis of pesticides and veterinary drugs. To achieve this goal, a grinding instrument is needed. The current solution adopted by the grinding instrument is to use a relatively hard plastic cup as the container for holding samples (i.e., the grinding cup). When processing samples with a high oil content, the oil is easily attached to the grinding cup due to the chemical property of material similarity and compatibility of the grinding cup itself. After grinding, as a reusable container, to meet the requirements of subsequent reuse and detection, the grinding cup needs to be carefully and thoroughly cleaned manually. Usually, this will result in a long cleaning time, which seriously affects work efficiency. Summary of the Invention

[0003] In view of the above problems, this application provides a grinding device.

[0004] A closed grinding device includes:

[0005] A base, an internal sealed cavity is formed inside the base, and the base is provided with an air extraction port; and

[0006] A grinding chamber is arranged in the sealed cavity. The outer wall of the grinding chamber is spaced from the inner wall of the base. The grinding chamber is provided with grinding chamber air holes and is used for placing a flexible grinding cup.

[0007] In one embodiment, it further includes a rotary locking shell sleeved outside the grinding chamber. The rotary locking shell is provided with rotary locking shell air holes. When the rotary locking shell rotates around the grinding chamber to the first position, the rotary locking shell air holes communicate with the grinding chamber air holes. When the rotary locking shell rotates around the grinding chamber to the second position, the rotary locking shell seals the grinding chamber air holes.

[0008] In one embodiment, the grinding chamber is provided with a grinding chamber sensor mounting hole, and the rotary locking shell is provided with a rotary locking shell sensor mounting hole. When the rotary locking shell rotates around the grinding chamber back and forth between the first position and the second position, the projection of the grinding chamber sensor mounting hole in the rotary locking shell sensor mounting hole falls into the rotary locking shell sensor mounting hole.

[0009] In one embodiment, it further includes a pressure sensor, which is arranged in the sensor mounting hole of the grinding chamber.

[0010] In one embodiment, it further includes a residue chamber, which is arranged around the side of the rotary locking housing away from the grinding chamber.

[0011] In one embodiment, the opening of the grinding chamber is higher than the opening of the base, and an installation snap ring is arranged at the opening of the grinding chamber for fixing the opening of the flexible grinding cup.

[0012] In one embodiment, it further includes a grinding chamber sealing table for pressing on the installation snap ring to fix the opening of the flexible grinding cup.

[0013] In one embodiment, the base is provided with a valve.

[0014] In one embodiment, the base is provided with a closed table valve.

[0015] In one embodiment, it further includes:

[0016] A grinding knife, which is arranged in the grinding chamber; and

[0017] A first motor, the drive shaft of the first motor is in transmission connection with the grinding knife.

[0018] The grinding device provided by the embodiment of the present application includes a base and a grinding chamber. The base surrounds to form a sealed cavity, and an air extraction port is arranged on the outer surface. The grinding chamber is arranged in the sealed cavity and air holes of the grinding chamber are arranged on the outer wall. The outer wall of the grinding chamber and the inner wall of the base are arranged at intervals. The grinding chamber is used to accommodate a flexible grinding cup. When the base is evacuated by a vacuum pump, the air pressure in the base becomes smaller. At this time, the flexible grinding cup begins to gradually expand towards the inner wall of the grinding chamber and finally adheres to the inner wall of the grinding chamber. Then, materials can be placed in the flexible grinding cup, and the materials can be ground by the grinding knife. After grinding, the flexible grinding cup can be directly taken out. When the grinding device is used next time, a new flexible grinding cup can be directly replaced, saving the step of cleaning the grinding cup, avoiding the problem of unclean cleaning of the grinding cup, and greatly improving the production efficiency at the same time.

[0019] Legend

[0020] Base 100

[0021] Air extraction port 110

[0022] Valve 120

[0023] Sealed cavity 201

[0024] Closed table valve 210

[0025] Grinding chamber 300

[0026] Grinding chamber mounting snap ring 301

[0027] Grinding chamber air hole 310

[0028] Grinding chamber sensor mounting hole 320

[0029] Grinding knife 400

[0030] First motor 410

[0031] Grinding chamber sealing table 420

[0032] Rotating locking housing 500

[0033] Rotating locking housing air hole 510

[0034] Rotating locking housing sensor mounting hole 520

[0035] First pressure sensor 600

[0036] Second pressure sensor 610

[0037] Residue chamber 501

[0038] First position

[0039] Second position

[0040] Figure 1 is the external view of an embodiment of the present application;

[0041] Figure 2 is the sectional view of an embodiment of the present application before the device works;

[0042] Figure 3 is the sectional view of an embodiment of the present application when the device is working;

[0043] Figure 4 is the sectional view of an embodiment of the present application during the operation of the rotating locking housing after the grinding chamber sealing table is pressed against the grinding chamber;

[0044] Figure 5 is Figure 4 the enlarged view of the partial structure within the circle A in;

[0045] Figure 6 is the partial structure sectional schematic view of an embodiment of the present application when the rotating locking housing is in the first position state;

[0046] Figure 7 is the partial structure sectional schematic view of an embodiment of the present application when the rotating locking housing is in the second position state;

[0047] Figure 8 is Figure 6 along Figure 1 the top view sectional schematic diagram of the A-A plane in

[0048] Figure 9 is Figure 7 along Figure 1 the top view sectional schematic diagram of the A-A plane in Specific embodiments

[0049] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the grinding instrument of the present application will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0050] The serial numbers assigned to the components in this article itself, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meanings. The "connection" and "coupling" mentioned in the present application, unless otherwise clearly specified and limited, both include direct and indirect connections (couplings). In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0051] In the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0052] Please refer to Figure 1, an embodiment of the present application provides a grinding device 10. The grinding device 10 includes a base 100 and a grinding chamber 300. A sealed cavity 201 is formed by surrounding inside the base 100. The base 100 is provided with an air extraction port 110. The grinding chamber 300 is arranged in the sealed cavity 201. The outer wall of the grinding chamber 300 is spaced from the inner wall of the base 100. The grinding chamber 300 is provided with grinding chamber air holes 310, and the grinding chamber 300 is used for placing a flexible grinding cup. The flexible grinding cup can be a disposable grinding cup. Therefore, the flexible grinding cup can be directly replaced after one grinding, and the cleaning step can be omitted, so the working efficiency can be improved.

[0053] In one embodiment, the grinding device 10 further includes a grinding knife 400, a first motor 410 and a grinding chamber sealing table 420. The grinding knife 400 can move along the axis of the grinding chamber 300 and can extend into the grinding chamber 300. The first motor 410 is in transmission connection with the grinding knife 400.

[0054] In one embodiment, a vacuum pump can be installed on one side of the base 100 away from the base 100, and the vacuum pump is connected to the air extraction port 110.

[0055] Please refer to Figure 2 , the base 100 surrounds to form a sealed cavity 201, and the grinding chamber 300 is included in the sealed cavity 201. The outer wall of the grinding chamber 300 is spaced from the inner wall of the base 100. The grinding chamber 300 is provided with grinding chamber air holes 310. When the sealed cavity 201 is evacuated through the air extraction port 110, the pressure in the sealed cavity 201 becomes smaller, and the flexible grinding cup will gradually adhere to the inner wall of the grinding chamber 300 due to the air pressure difference inside and outside the grinding chamber 300; at this time, the first motor 410 drives the grinding knife 400 to rotate and grind the materials in the grinding cup.

[0056] In this embodiment, the base 100 can be a rectangular or cylindrical structure; the air extraction port 110 can be arranged on the outer surface of the base 100.

[0057] In one embodiment, the grinding device 10 further includes a valve 120. The valve 120 is arranged on the base 100. After grinding is completed, the valve 120 can be opened to make the air pressure in the base 100 become atmospheric pressure. Thus, it is convenient to take out the flexible grinding cup.

[0058] In one embodiment, there may be multiple air holes 310 in the grinding chamber. The air holes 310 in the grinding chamber may be evenly spaced on the surface of the grinding chamber 300. The flexible grinding cup may be made of plastic or water-insoluble degradable material. The flexible grinding cup is prone to deformation. Materials can be placed in the flexible grinding cup. In one embodiment, a filter screen is provided in the air holes 310 of the grinding chamber. The filter screen may have a relatively large density. Therefore, when the flexible grinding cup is accidentally damaged, the materials sucked into the air holes 310 of the grinding chamber can be intercepted by the filter screen, preventing the materials from entering the sealing cavity 201.

[0059] In one embodiment, the opening of the grinding chamber 300 protrudes from the outer surface of the base 100, that is, the opening of the grinding chamber 300 is higher than the opening of the base 100. A grinding chamber mounting snap ring 301 for fixing the opening of the flexible grinding cup is provided at the opening edge of the grinding chamber 300. The opening of the flexible grinding cup can be fixed by the grinding chamber mounting snap ring 301 to prevent the flexible grinding cup from falling off.

[0060] In one embodiment, the grinding device 10 further includes a grinding chamber sealing platform 420 provided at the opening of the grinding chamber 300. The grinding chamber sealing platform 420 can be used to press and fix the edge of the flexible grinding cup sleeved on the opening of the grinding chamber 300; please refer to Figure 3 , the edge of the grinding chamber sealing platform 420 can be opposite to the opening position of the grinding chamber 300. After the edge of the opening of the flexible grinding cup is sleeved on the opening of the grinding chamber 300, the edge of the opening of the flexible grinding cup can be further pressed by the grinding chamber sealing platform 420 to prevent the flexible grinding cup from falling off. The grinding chamber sealing platform 420 can also be used to cover the opening of the grinding chamber 300 to prevent the sample from splashing upward during grinding.

[0061] In one embodiment, the drive shaft of the first motor 410 extends through the grinding chamber sealing platform 420 towards the grinding chamber 300. That is, an opening can be provided at the center of the grinding chamber sealing platform 420. The drive shaft of the first motor 410 can pass through the opening.

[0062] In one embodiment, the base 100 has a frustum structure. That is, the diameter of the bottom of the base 100 is larger than the diameter of the top of the base 100, so that the center of the base 100 can be lowered to improve stability.

[0063] In one embodiment, a closing platform valve 210 is provided on the side wall of the base 100, which allows air to flow freely between the sealing cavity 201 and the atmosphere in case of emergency, changing the highly vacuum state in the sealing cavity 201 to atmospheric pressure.

[0064] In one embodiment, after the material in the flexible grinding cup is ground, the flexible grinding cup can be directly taken out, and a new flexible grinding cup can be directly replaced when the grinding device 10 is used next time, eliminating the step of cleaning the grinding cup, avoiding the problem of unclean cleaning of the grinding cup, and greatly improving the production efficiency at the same time.

[0065] Please refer to Figure 4 and Figure 5 , in one embodiment, the grinding device 10 further includes a first pressure sensor 600. The first pressure sensor 600 is disposed on the inner wall of the grinding chamber 300. It can be understood that the grinding device 10 can be provided with a control module, and the first motor 410 and the first pressure sensor 600 can both be connected to the control module. The control module can be an industrial control module such as a PLC. The first pressure sensor 600 can be multiple and can be evenly distributed on the inner wall of the grinding chamber 300. When starting to evacuate the base 100, the flexible grinding cup gradually adheres tightly to the inner wall of the grinding chamber 300. When the pressure sensed by all the first pressure sensors 600 reaches the first preset value, it can be determined that the flexible grinding cup has been fully attached to the inner wall of the grinding chamber 300. At this time, the control module can be used to control the grinding knife 400 to start grinding the material.

[0066] In one embodiment, the first pressure sensor 600 is disposed at a position of the grinding chamber 300 close to the base 100. Thus, the grinding knife 400 can be prevented from affecting the first pressure sensor 600. In one embodiment, a grinding chamber sensor mounting hole 320 is provided on the side wall of the grinding chamber 300, and the first pressure sensor 600 is mounted in the grinding chamber sensor mounting hole 320.

[0067] In one embodiment, the grinding chamber sensor mounting hole 320 is also provided on the bottom wall of the grinding chamber 300 along the axial extension direction, and a rotating locking housing sensor mounting hole 520 is provided on the bottom wall of the rotating locking housing 500 along the axial extension direction. The projection of the rotating locking housing sensor mounting hole 520 along the axis of the grinding chamber 300 on the bottom wall of the grinding chamber 300 coincides with the sensor mounting hole 320 in this embodiment. In this embodiment, a second pressure sensor 610 is further included, which passes through the rotating locking housing sensor mounting hole 520 and is fixedly disposed in the grinding chamber sensor mounting hole 320. The second pressure sensor 610 can detect the pressure received by the bottom wall of the grinding chamber 300.

[0068] Please refer to Figure 2 , Figure 6 and Figure 7, in one embodiment, it further includes a rotary locking housing 500 sleeved outside the grinding chamber 300. The rotary locking housing 500 is provided with a rotary locking housing air hole 510. When the rotary locking housing 500 rotates around the grinding chamber 300 to the first position, the rotary locking housing air hole 510 communicates with the grinding chamber air hole 310. When the rotary locking housing 500 rotates around the grinding chamber 300 to the second position, the rotary locking housing 500 seals the grinding chamber air hole 310.

[0069] The rotary locking housing 500 can allow air to flow freely between the grinding chamber 300 and the sealing cavity 201 when in the first position, and can reach the second position after rotating a certain angle around its own axis to shield all the grinding chamber air holes 310, thereby blocking the flow of air between the grinding chamber 300 and the sealing cavity 201.

[0070] Please refer to Figure 4 、 Figure 6 and Figure 7 , in one embodiment, the rotary locking housing 500 further includes a residue chamber 501 disposed on the outside of the rotary locking housing 500 and away from the axis of the rotary locking housing 500. The residue chamber 501 can enable, when the flexible grinding cup accidentally breaks, the sample to be ground to fall into the residue chamber 501 after being sucked out of the outer wall of the grinding chamber 300, thus avoiding being sucked into the air suction port 110.

[0071] Please refer to Figure 8 and Figure 9 , it can be seen from the figure the relative positions of the grinding chamber sensor mounting hole 320 and the rotary locking housing sensor mounting hole 520. In Figure 8 the rotary locking housing 500 is in the first position, at this time the vertical projection of the rotary locking housing air hole 510 on the outer wall of the grinding chamber 300 coincides with the position of the grinding chamber air hole 310; in Figure 9The rotary locking housing 500 described in [reference] is in the second position, at which time the vertical projection of the air hole 510 of the rotary locking housing on the outer wall of the grinding chamber 300 does not coincide with the position of the air hole 310 of the grinding chamber, so that the air between the inside of the grinding chamber 300 and the sealing cavity 201 cannot flow, realizing the sealing inside the grinding chamber 300. Since the projection of the grinding chamber sensor mounting hole 320 on the rotary locking housing sensor mounting hole 520 completely falls into the rotary locking housing sensor mounting hole 520 at the first position and the second position. That is, when switching between the first position and the second position, the grinding chamber sensor mounting hole 320 is completely exposed in the rotary locking housing sensor mounting hole 520. Therefore, when the first pressure sensor 600 is installed in the grinding chamber sensor mounting hole 320, the rotary locking housing sensor mounting hole 520 will not touch the first pressure sensor 600.

[0072] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0073] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation of the scope of this patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A closed grinding device, characterized in that, Comprising: A base (100), an internal enclosed sealed cavity (201) is formed inside the base (100), and an air extraction port (110) is provided on the base (100); A grinding chamber (300), arranged in the sealed cavity (201), the outer wall of the grinding chamber (300) is spaced from the inner wall of the base (100), a grinding chamber air hole (310) is provided on the grinding chamber (300), and the grinding chamber (300) is used for placing a flexible grinding cup; and A rotary locking shell (500), sleeved outside the grinding chamber (300), a rotary locking shell air hole (510) is provided on the rotary locking shell (500), when the rotary locking shell (500) rotates around the grinding chamber (300) to the first position, the rotary locking shell air hole (510) communicates with the grinding chamber air hole (310), and when the rotary locking shell (500) rotates around the grinding chamber (300) to the second position, the rotary locking shell (500) seals the grinding chamber air hole (310); A grinding knife (400), arranged in the grinding chamber (300).

2. The enclosed grinding device according to claim 1, wherein, The grinding chamber (300) is provided with a grinding chamber sensor mounting hole (320), the rotary locking shell (500) is provided with a rotary locking shell sensor mounting hole (520), when the rotary locking shell (500) rotates around the grinding chamber (300) back and forth between the first position and the second position, the projection of the grinding chamber sensor mounting hole (320) in the rotary locking shell sensor mounting hole (520) falls into the rotary locking shell sensor mounting hole (520).

3. The enclosed grinding device according to claim 2, wherein, It further includes a first pressure sensor (600), arranged in the grinding chamber sensor mounting hole (320).

4. The enclosed grinding device according to claim 1, wherein, It further includes a residue chamber (501), arranged around the side of the rotary locking shell (500) away from the grinding chamber (300).

5. The enclosed grinding device according to claim 1, characterized in that, The opening of the grinding chamber (300) is higher than the opening of the base (100), and an installation snap ring (301) is provided at the opening of the grinding chamber (300) for fixing the opening of the flexible grinding cup.

6. The enclosed grinding device according to claim 5, characterized in that, It further includes a grinding chamber sealing table (420), used for pressing on the installation snap ring (301) to fix the opening of the flexible grinding cup.

7. The enclosed grinding device according to claim 1, characterized in that, The base (100) is provided with a valve (120).

8. The enclosed grinding device according to claim 1, wherein The base (100) is provided with a closed table valve (210).

9. The enclosed grinding device according to claim 1, characterized in that, It further includes: A first motor (410), the drive shaft of the first motor (410) is in transmission connection with the grinding knife (400).

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