Solid particle stirrer suitable for laboratory

By designing a laboratory solid particle mixer containing a variety of components, using a sealed bag and nitrogen protection material, and driving the rotation and shaking through the drive motor and chain system The problem realizes a more sufficient stirring effect and better cleaning.

CN119368055APending Publication Date: 2025-01-28HUANENG POWER INT ENERGY DEV CO LTD
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Patent Information

Application Number
CN202411286806.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-13
Publication Date
2025-01-28

AI Technical Summary

Technical Problem

Existing laboratory solid particle agitators have problems such as large size, difficulty in cleaning and cross-contamination, especially when dealing with active particulate matter.

Method used

Designed a mixer that includes support components, drivers, rotating components, sliding components, extrusion components, reset components, clamp components, mobile components and locking components, and use the drive motor and nitrogen protection material through sealing bags and nitrogen protection materials, using the drive motor and the driver motor and the use of the drive motor and The chain system drives rotation and shaking to achieve more sufficient stirring.

Benefits of technology

The design achieves a more sufficient stirring effect, avoiding the problems of insufficient stirring and cross -pollution. At the same time, the cleaning process is simplified through sealing bags and nitrogen protection to prevent cross -pollution.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a laboratory solid particle stirrer which comprises a basic part, a supporting assembly, a driving assembly arranged on the supporting assembly and a rotating assembly arranged on the driving assembly. The shaking component comprises a sliding assembly arranged on the rotating assembly, an extrusion assembly arranged on the sliding assembly and a reset assembly arranged on the rotating assembly. According to the solid particle stirrer suitable for the laboratory, a driving motor operates to drive a chain to drive a rotating frame to rotate, and when the rotating frame rotates, an extrusion rod is extruded by an extrusion groove, so that a sliding block drives a shaking frame to move in the rotating frame, and stirring is more sufficient during stirring; meanwhile, the problem of cleaning can be solved by using the sealing bag, and cross contamination caused by incomplete cleaning is prevented.
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Description

Technical Field

[0001] The invention relates to the technical field of stirring equipment, and in particular to a solid particle stirrer suitable for laboratories. Background Art

[0002] A mixer is usually powered by an electric motor that rotates or moves within a container or bowl to mix the ingredients. Mixers come in a variety of types and sizes and are used for a wide range of purposes, primarily to mix different items together.

[0003] At present, there are still some shortcomings in the agitators on the market. Among them, most of the existing agitators are open. Traditional solid material mixers are large in size, difficult to clean, and have cross-contamination problems during mixing. When the particles are more active and prone to oxidation, mixing cannot be performed. This needs to be improved. Summary of the invention

[0004] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0005] In view of the above-mentioned existing problems of the traditional solid material mixer suitable for laboratory solid particle agitators, such as large size, difficult to clean, and cross contamination during mixing, the present invention is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a basic component, including a supporting assembly, a driving assembly arranged on the supporting assembly, and a rotating assembly arranged on the driving assembly; a shaking component, including a sliding assembly arranged on the rotating assembly, an extruding assembly arranged on the sliding assembly, and a resetting assembly arranged on the rotating assembly; and a fixing component, including a clamping assembly arranged on the sliding assembly, a moving assembly arranged on the clamping assembly, and a locking assembly arranged on the clamping assembly.

[0007] As a preferred solution of the laboratory solid particle agitator according to the present invention, the support assembly includes a chassis, support plates arranged on both sides of the top of the chassis, and mounting holes arranged on the support plates.

[0008] As a preferred solution of the laboratory solid particle agitator described in the present invention, the driving assembly includes a rotating rod arranged inside the mounting hole, a driving motor arranged on the chassis, a sprocket arranged on the driving motor and the rotating rod, and a chain arranged on the sprocket.

[0009] As a preferred solution of the laboratory solid particle agitator according to the present invention, the rotating assembly includes a rotating disk arranged on the rotating rod, a storage slot arranged on the rotating disk, and a control rod arranged inside the storage slot.

[0010] As a preferred solution of the laboratory solid particle agitator described in the present invention, the sliding assembly includes a rotating frame arranged on the rotating rod, a sliding groove arranged on the rotating frame, a sliding block arranged inside the sliding groove, and a shaking frame arranged on the sliding block.

[0011] As a preferred solution of the laboratory solid particle agitator described in the present invention, the extrusion assembly includes an extrusion groove arranged on the support plate, and an extrusion rod arranged on the sliding block; the inner wall of the bottom end of the extrusion groove is horizontal, and the inner wall on the front side is elliptical, and the center of the circle is located at the mounting hole.

[0012] As a preferred solution of the present invention suitable for a laboratory solid particle agitator, the reset assembly includes a reset hole arranged on the rotating frame, a reset rod arranged inside the reset hole, a baffle rod arranged at the bottom end of the reset rod, and a reset spring arranged on the baffle rod.

[0013] As a preferred solution of the laboratory solid particle agitator described in the present invention, the clamping assembly includes a fixed plate arranged on the shaking frame, a movable plate arranged on the shaking frame, a groove arranged on the fixed plate, and a protruding block arranged on the movable plate.

[0014] As a preferred solution of the laboratory solid particle agitator described in the present invention, the moving component includes a moving groove arranged on the shaking frame, a moving block arranged inside the moving groove, and a moving spring arranged at the front end of the moving block.

[0015] As a preferred solution of the present invention suitable for a laboratory solid particle agitator, the locking assembly includes a limiting groove arranged on the fixed plate, a locking block arranged inside the limiting groove, a locking spring arranged on the locking block, and a locking rod arranged on the movable plate.

[0016] The beneficial effects of the present invention are as follows: all items to be stirred are sealed inside a sealing bag, and nitrogen is filled into the inside; the sealing bag is fixed by a clamping assembly, and driven by a driving motor, so that a chain drives a rotating frame to rotate; when the rotating frame rotates, the extrusion rod is squeezed by the extrusion groove, so that the sliding block drives the shaking frame to move inside the rotating frame, so that the stirring is more sufficient during the stirring, and insufficient stirring is prevented; at the same time, the use of a sealing bag can avoid the problem of cleaning, and prevent cross contamination caused by incomplete cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0018] Figure 1 The figure is a schematic diagram of the overall structure of the solid particle agitator suitable for laboratory use according to the present invention.

[0019] Figure 2 The present invention is a schematic diagram of the structure of a shaking component of a laboratory solid particle agitator.

[0020] Figure 3 The figure is a schematic diagram of the support plate structure of the present invention which is suitable for a laboratory solid particle agitator.

[0021] Figure 4 The present invention is a schematic diagram of the structure of a clamping assembly suitable for a laboratory solid particle agitator.

[0022] Figure 5 The figure is a schematic diagram of the structure of the locking assembly of the present invention applicable to a laboratory solid particle agitator.

[0023] Figure 6 The figure is a schematic diagram of the structure of the moving component of the present invention which is suitable for a laboratory solid particle agitator. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0027] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0028] Example 1, reference Figure 1 to Figure 6 , which is the first embodiment of the present invention, provides a solid particle agitator suitable for a laboratory. The device includes a base component 100, including a support component 101, a drive component 102 arranged on the support component 101, and a rotating component 103 arranged on the drive component 102.

[0029] Among them, the support component 101 is used to support the driving component 102 and the rotating component 103, the driving component 102 is used to provide power for the operation of the device so that the entire agitator can operate, and the rotating component 103 is used to manually control the operation of the agitator.

[0030] Preferably, by controlling the operation of the driving component 102 , the driving component 102 drives the parts inside the device to rotate so as to achieve a stirring effect, and manual control can also be achieved through the rotating component 103 .

[0031] Furthermore, the shaking component 200 includes a sliding component 201 disposed on the rotating component 103 , a pressing component 202 disposed on the sliding component 201 , and a resetting component 203 disposed on the rotating component 103 .

[0032] Among them, the sliding component 201 is used to control the fixing component 300 to move up and down when rotating, so that when the device rotates, it can drive the middle fixing component 300 to move up and down, so that the whole device can be shaken, making the device stir more evenly.

[0033] Furthermore, the fixing component 300 includes a clamping component 301 disposed on the sliding component 201 , a moving component 302 disposed on the clamping component 301 , and a locking component 303 disposed on the clamping component 301 .

[0034] Among them, the clamping component 301 is used to fix the sealing bag containing particles, the moving component 302 is used to control the movement of the fixing component so that the fixing component can move, and the locking component 303 is used to limit the clamping component 301 so that the clamping component 301 can lock the sealing belt.

[0035] Preferably, the movement of the moving component 302 drives the clamping component 301 to move, so that the clamping component 301 clamps the sealed bag containing the material, and the clamping component 301 is fixed by the locking component 303, and the driving component 102 is operated to rotate the device, and then the squeezing component 202 drives the clamping component 301 to move up and down, so that the device shakes when it rotates, so that the device can be stirred more evenly.

[0036] Furthermore, in current laboratories, particle samples are mostly stirred by manual shaking. For example, when testing the moisture content in coal, some methods require shaking the coal sample for not less than 1.25 kg for not less than one minute. The manual method is very laborious, and some methods even require shaking not less than 3 kg of coal sample for not less than one minute. It is difficult for manpower to stir continuously. At this time, controlling the operation of the equipment by controlling the drive module can achieve the effect of saving manpower.

[0037] In summary: first, the material to be stirred is encapsulated inside a sealed bag and filled with nitrogen, and then the operation of the driving component 102 is controlled to enable the rotating frame 201a in the sliding component 201 to rotate. When the rotating frame 201a rotates, the extrusion component 202 cooperates with the rotation of the rotating frame 201a to enable the shaking frame 201d of the shaking component 200 to move up and down, so that the entire device can also shake while rotating, making the stirring more uniform. At the same time, the sealing bag device can isolate the particles to be stirred from the air to prevent external impurities from cross-infecting the stirring material.

[0038] Example 2, reference Figure 1 to Figure 3 , which is the second embodiment of the present invention, comprises: the supporting assembly 101 comprises a chassis 101a, supporting plates 101b arranged at both sides of the top of the chassis 101a, and mounting holes 101c arranged on the supporting plates 101b.

[0039] The chassis 101a is used to support the two support plates 101b, thereby supporting the entire rotating device, and the mounting hole 101c is used to place the rotating rod 102a in the driving assembly 102, so that the rotating rod 102a can rotate normally.

[0040] Furthermore, the driving assembly 102 includes a rotating rod 102a disposed inside the mounting hole 101c, a driving motor 102b disposed on the chassis 101a, a sprocket 102c disposed on the driving motor 102b and the rotating rod 102a, and a chain 102d disposed on the sprocket 102c.

[0041] Among them, the rotating rod 102a is used to control the rotation of the parts inside the equipment, so as to complete the stirring of the material, and the driving motor 102b is used to control the rotation of the sprocket 102c. The two sprockets 102c are connected by a chain 102d, so that the rotating rod 102a can rotate with it, thereby driving the internal parts to rotate.

[0042] Preferably, the sprocket 102c is rotated by driving the motor 102b, so that the chain 102d drives another sprocket 102c to rotate, and the sprocket 102c drives the rotating rod 102a to rotate, thereby rotating the internal parts, thereby achieving a stirring effect.

[0043] Furthermore, the rotating assembly 103 includes a rotating disk 103a disposed on the rotating rod 102a, a storage slot 103b disposed on the rotating disk 103a, and a control rod 103c disposed inside the storage slot 103b.

[0044] The rotating disk 103a is used to control the rotation of the rotating rod 102a, so that the internal parts rotate, and the storage slot 103b is used to place the control rod 103c, and the control rod 103c is used to control the rotation of the rotating disk 103a.

[0045] Furthermore, the sliding assembly 201 includes a rotating frame 201a disposed on the rotating rod 102a, a sliding groove 201b disposed on the rotating frame 201a, a sliding block 201c disposed inside the sliding groove 201b, and a shaking frame 201d disposed on the sliding block 201c.

[0046] Among them, the rotating frame 201a is used to place the shaking component 200 so that it can rotate together with the rotating rod 102a, and the sliding groove 201b is set to limit the movement of the sliding block 201c, so that the sliding block 201c can drive the internal shaking frame 201d to move up and down inside the rotating frame 201a.

[0047] Furthermore, the extrusion assembly 202 includes an extrusion groove 202a arranged on the support plate 101b, and an extrusion rod 202b arranged on the sliding block 201c; the bottom inner wall of the extrusion groove 202a is horizontal, and the inner wall on the front side is elliptical, with the center located at the mounting hole 101c.

[0048] The squeezing groove 202a is configured to cooperate with the squeezing rod 202b to drive the sliding block 201c to move when the rotating frame 201a rotates, so that the sliding block 201c can move inside the sliding groove 201b.

[0049] Preferably, when the rotating frame 201a rotates, it will drive the sliding block 201c to make a circular motion. When the sliding block 201c makes a circular motion, the sliding block 201c will drive the extrusion plate to rotate. When the extrusion plate and the extrusion groove 202a contact, the sliding block 201c will move up and down, so that the sealing bag on the clamping assembly 301 will shake when rotating, making the stirring more uniform.

[0050] Furthermore, the reset assembly 203 includes a reset hole 203a disposed on the rotating frame 201a, a reset rod 203b disposed inside the reset hole 203a, a blocking rod 203c disposed at the bottom end of the reset rod 203b, and a reset spring 203d disposed on the blocking rod 203c.

[0051] Among them, the reset hole 203a is used to place the reset rod 203b, the setting of the blocking rod 203c is used to fix the reset spring 203d, and the reset spring 203d is used to push the blocking rod 203c, so that the reset rod 203b pulls the shaking frame 201d, so that the shaking frame 201d is always at the bottom.

[0052] Preferably, when the extrusion rod 202b is squeezed by the extrusion groove 202a, the shaking frame 201d will rise. When the extrusion rod 202b is separated from the extrusion groove 202a, the return spring 203d pushes the blocking rod 203c, so that the blocking rod 203c drives the return rod 203b to move downward, thereby returning the shaking frame 201d to its original position. When the extrusion rod 202b contacts the extrusion groove 202a again, the above operation is repeated.

[0053] In summary: the sprocket 102c is driven to rotate by the driving motor 102b, so that the rotating rod 102a is rotated, and the rotation of the rotating rod 102a will drive the rotation of the rotating frame 201a, so that the rotating frame 201a drives the internal shaking component 200 to rotate, and when the rotating frame 201a rotates, it will drive the extrusion rod 202b to rotate, and when the extrusion plate and the extrusion groove 202a are in contact, the sliding block 201c will move up and down, so that the sealing bag on the clamping assembly 301 will shake during rotation, so that the stirring is more uniform, and when the extrusion rod 202b is separated from the extrusion groove 202a, the reset spring 203d pushes the baffle rod 203c, so that the baffle rod 203c drives the reset rod 203b to move downward, so that the shaking frame 201d returns to its original position, and when the extrusion rod 202b contacts the extrusion groove 202a again, the above operation is repeated again, so that the stirring is more uniform.

[0054] Example 3, reference Figures 4 to 6 , which is the third embodiment of the present invention, includes: the clamping assembly 301 includes a fixed plate 301a arranged on the shaking frame 201d, a movable plate 301b arranged on the shaking frame 201d, a groove 301c arranged on the fixed plate 301a, and a protruding block 301d arranged on the movable plate 301b.

[0055] Among them, the fixed plate 301a is used to cooperate with the movable plate 301b to clamp the sealing bag, so that the sealing bag is fixed, and the setting of the groove 301c is used to cooperate with the protruding block 301d so that the two ends of the sealing bag can be bent during fixation, so that the sealing bag is fixed more firmly to prevent it from falling off.

[0056] Preferably, when fixing, the two ends of the sealing bag are pressed into the corresponding grooves 301c by the protruding blocks 301d on the movable plate 301b to form bends, so that the fixing effect is better and the sealing bag is prevented from falling off when the equipment is operating.

[0057] Furthermore, the moving assembly 302 includes a moving groove 302a disposed on the shaking frame 201d, a moving block 302b disposed inside the moving groove 302a, and a moving spring 302c disposed at the front end of the moving block 302b.

[0058] Among them, the setting of the moving groove 302a is used to limit the moving trajectory of the moving block 302b, thereby driving the moving plate 301b to move, so that the moving plate 301b clamps the two ends of the sealing bag to complete the fixation, and the setting of the moving spring 302c is used to push the moving block 302b, so that the moving plate 301b fits the fixed plate 301a.

[0059] Furthermore, the locking assembly 303 includes a limiting groove 303a disposed on the fixed plate 301a, a locking block 303b disposed inside the limiting groove 303a, a locking spring 303c disposed on the locking block 303b, and a locking rod 303d disposed on the movable plate 301b.

[0060] Among them, the limiting groove 303a is used to place the locking block 303b and the locking spring piece 303c, so that the locking block 303b can move inside, and the locking spring piece 303c is used to push the locking block 303b to lock the locking rod 303d, so that the locking rod 303d cannot be separated from the limiting groove 303a, and the locking rod 303d is used to fix the movable plate 301b, so that the movable plate 301b cannot move when locked, thereby completing the locking of the sealing bag.

[0061] In summary: all the items that need to be stirred are sealed inside a sealing bag, and nitrogen is filled inside, the sealing bag is fixed by the clamping assembly 301, and the driving motor 102b is driven to drive the chain 102d to drive the rotating frame 201a to rotate. When the rotating frame 201a rotates, the extrusion rod 202b will be squeezed by the extrusion groove 202a, so that the sliding block 201c drives the shaking frame 201d to move inside the rotating frame 201a, so that the stirring is more sufficient during the stirring, and insufficient stirring is prevented. At the same time, the use of a sealing bag can avoid the problem of cleaning and prevent cross contamination caused by incomplete cleaning.

[0062] The remaining structure is the same as that of Example 2.

[0063] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0064] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0065] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A solid particle agitator suitable for laboratory, characterized by: include, A basic component (100) comprises a supporting assembly (101), a driving assembly (102) arranged on the supporting assembly (101), and a rotating assembly (103) arranged on the driving assembly (102); The shaking component (200) comprises a sliding component (201) arranged on the rotating component (103), a pressing component (202) arranged on the sliding component (201), and a resetting component (203) arranged on the rotating component (103); and, The fixing component (300) comprises a clamping component (301) arranged on the sliding component (201), a moving component (302) arranged on the clamping component (301), and a locking component (303) arranged on the clamping component (301).

2. The solid particle agitator suitable for laboratory use according to claim 1, characterized in that: The support assembly (101) comprises a chassis (101a), support plates (101b) arranged on both sides of the top end of the chassis (101a), and mounting holes (101c) arranged on the support plates (101b).

3. The solid particle agitator suitable for laboratory use according to claim 2, characterized in that: The driving assembly (102) comprises a rotating rod (102a) arranged inside the mounting hole (101c), a driving motor (102b) arranged on the chassis (101a), a sprocket (102c) arranged on the driving motor (102b) and the rotating rod (102a), and a chain (102d) arranged on the sprocket (102c).

4. The solid particle agitator suitable for laboratory use according to claim 3, characterized in that: The rotating assembly (103) comprises a rotating disk (103a) arranged on the rotating rod (102a), a storage slot (103b) arranged on the rotating disk (103a), and a control rod (103c) arranged inside the storage slot (103b).

5. The solid particle agitator suitable for laboratory use according to claim 4, characterized in that: The sliding assembly (201) comprises a rotating frame (201a) arranged on the rotating rod (102a), a sliding groove (201b) arranged on the rotating frame (201a), a sliding block (201c) arranged inside the sliding groove (201b), and a shaking frame (201d) arranged on the sliding block (201c).

6. The solid particle agitator suitable for laboratory use according to claim 5, characterized in that: The extrusion assembly (202) comprises an extrusion groove (202a) arranged on the support plate (101b), and an extrusion rod (202b) arranged on the sliding block (201c); The inner wall of the bottom end of the extrusion groove (202a) is horizontal, and the inner wall on the front side is elliptical, with the center of the circle located at the mounting hole (101c).

7. The solid particle agitator suitable for laboratory use according to claim 6, characterized in that: The reset assembly (203) comprises a reset hole (203a) arranged on the rotating frame (201a), a reset rod (203b) arranged inside the reset hole (203a), a blocking rod (203c) arranged at the bottom end of the reset rod (203b), and a reset spring (203d) arranged on the blocking rod (203c).

8. The solid particle agitator suitable for laboratory use according to claim 7, characterized in that: The clamping assembly (301) comprises a fixed plate (301a) arranged on the shaking frame (201d), a movable plate (301b) arranged on the shaking frame (201d), a groove (301c) arranged on the fixed plate (301a), and a protruding block (301d) arranged on the movable plate (301b).

9. The solid particle agitator suitable for laboratory use according to claim 8, characterized in that: The moving component (302) comprises a moving groove (302a) arranged on the shaking frame (201d), a moving block (302b) arranged inside the moving groove (302a), and a moving spring (302c) arranged at the front end of the moving block (302b).

10. The solid particle agitator suitable for laboratory use according to claim 9, characterized in that: The locking assembly (303) comprises a limiting groove (303a) arranged on the fixed plate (301a), a locking block (303b) arranged inside the limiting groove (303a), a locking spring (303c) arranged on the locking block (303b), and a locking rod (303d) arranged on the movable plate (301b).