Powder blanking device

Abstract

The utility model relates to the technical field of coal analysis, and provides a powder blanking device which comprises a stock bin, a supporting assembly, a vibration assembly and a limiting shaft assembly, and a blanking hole communicated with the interior of the stock bin is formed in the bottom of the stock bin; the supporting assembly is arranged on the peripheral face of the stock bin in a sleeving mode and movably matched with the stock bin in the vertical direction. The vibration assembly is connected with the stock bin and used for driving the stock bin to vibrate in the vertical direction. The limiting shaft assembly comprises a limiting shaft, the limiting shaft comprises a limiting section and a blanking section, and the limiting section is movably inserted into the blanking hole. The vibration assembly drives the stock bin, the limiting shaft assembly and sample powder in the stock bin to vibrate in the vertical direction together, so that the sample powder falls downwards through the gap between the blanking section and the inner wall of the blanking hole, and blanking of the sample powder is completed. The powder blanking device has the advantages of being simple in structure, accurate in control, convenient to maintain and low in production cost, and can meet the blanking requirements of various kinds of medium powder.

Description

Technical Field

[0001] The utility model relates to the technical field of coal analysis, in particular to a powder dropping device. Background Art

[0002] In the field of coal quality analysis, whether it is industrial analysis or elemental analysis, the first step is to manually weigh the coal sample powder to be analyzed. The weight of a single coal sample to be analyzed varies from 0.05g, 0.2g to 1g, depending on the analysis item, and the deviation is generally within 10%. Sample weighing is already micro-weighing, and the weighing operation requires precision and high repeatability. It is tedious and requires high manual proficiency, and it takes a lot of time and effort.

[0003] With the continuous advancement of technology, coal quality analysis has begun to develop towards intelligence, and the market has realized automatic weighing of analytical test coal samples, liberating manpower and making great progress in technology. Due to the weighing of trace coal samples, the automatic weighing and blanking mechanisms currently on the market have problems such as large sample weight error, low efficiency, complex structure and high cost. Utility Model Content

[0004] The utility model provides a powder dropping device, which is used to solve the problems of large sample weight error, low efficiency, complex structure and high cost in the prior art.

[0005] The utility model provides a powder dropping device, comprising:

[0006] A silo, wherein the bottom of the silo is provided with a material drop hole communicating with the interior of the silo;

[0007] A support assembly, sleeved on the outer peripheral surface of the silo and movably matched with the silo in the up and down directions;

[0008] A vibration component connected to the silo, the vibration component is used to drive the silo to vibrate in an up and down direction;

[0009] A limiting shaft assembly comprises a limiting shaft, wherein the limiting shaft comprises a limiting section and a blanking section, wherein the limiting section can be movably inserted in the blanking hole, the limiting section is connected to the upper end of the blanking section, the cross-sectional area of ​​the blanking section is smaller than the cross-sectional area of ​​the blanking hole, and the cross-sectional area of ​​the limiting section is greater than or equal to the cross-sectional area of ​​the blanking hole; the limiting shaft is suitable for vibrating between a first position and a second position; in the first position, the limiting section is in contact with the blanking hole to seal the blanking hole; in the second position, the limiting section is away from the blanking hole, and the sample powder flows out through the gap between the blanking section and the inner wall of the blanking hole.

[0010] According to a powder dropping device provided by the utility model, a sealing surface is formed at the connection between the limiting section and the dropping section, and guiding surfaces are formed on both sides of the dropping section. The guiding surfaces are connected to the sealing surfaces, and the gap is formed between the guiding surfaces and the side walls of the dropping hole; in the first position, the sealing surface is in contact with the edge of the dropping hole.

[0011] According to a powder dropping device provided by the utility model, a guide hole is provided at the bottom of the silo, the guide hole is located below the dropping hole, and the guide hole is communicated with the dropping hole.

[0012] According to a powder dropping device provided by the utility model, a first limiting portion is provided at the lower end of the dropping section, the first limiting portion is located in the guide hole, and the cross-sectional area of ​​the first limiting portion is larger than the cross-sectional area of ​​the dropping hole.

[0013] According to a powder dropping device provided by the utility model, the limiting shaft assembly also includes:

[0014] A stirring limit rod, the lower end of which is connected to the limit section, and a plurality of stirring parts are arranged at intervals on the outer peripheral surface of the lower end of the stirring limit rod; in the first position, the stirring part abuts against the inner wall of the silo.

[0015] According to a powder dropping device provided by the utility model, the support assembly includes:

[0016] A guide sleeve, which is sleeved on the outer peripheral surface of the silo and movably cooperates with the silo in the up and down directions;

[0017] A fixing member is connected to the guide sleeve.

[0018] According to a powder dropping device provided by the utility model, the support assembly includes:

[0019] A limiting member is connected to the silo and is located below the guide sleeve, and the limiting member and the guide sleeve are spaced apart.

[0020] According to a powder dropping device provided by the utility model, the limiting member includes a retaining spring, the outer peripheral surface of the material bin is provided with a retaining groove, and the retaining spring is retained in the retaining groove.

[0021] According to a powder dropping device provided by the utility model, the vibration component includes:

[0022] A connecting plate connected to the silo;

[0023] A vibrator is arranged on the connecting plate, and is used to drive the silo to vibrate in the up and down directions.

[0024] According to a powder dropping device provided by the utility model, the vibration component also includes:

[0025] The buffer silencer ring is made of a flexible material. The outer peripheral surface of the silo has a contact surface. The buffer silencer ring is sleeved on the outer peripheral surface of the silo and is located between the contact surface and the upper surface of the guide sleeve.

[0026] The powder dropping device provided by the utility model drives the material bin, the limit shaft assembly and the sample powder in the material bin to vibrate in the up and down directions through the vibration assembly, so that the sample powder falls downward through the gap between the dropping section and the inner wall of the dropping hole, completing the dropping of the sample powder. The powder dropping device provided by the utility model has the advantages of simple structure, precise control, convenient maintenance and low production cost, and can be used for the dropping needs of various medium powders. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 It is a three-dimensional structural schematic diagram of the powder dropping device provided by the utility model;

[0029] Figure 2 It is a schematic diagram of the top view of the powder dropping device provided by the utility model;

[0030] Figure 3 yes Figure 2 The schematic diagram of the cross-section structure along the section line AA;

[0031] Figure 4 It is a three-dimensional structural schematic diagram of the limit shaft provided by the utility model;

[0032] Figure 5 It is a side view structural schematic diagram of the limit shaft provided by the utility model;

[0033] Figure 6 It is a schematic diagram of the main structure of the stirring limit rod of the limit shaft provided by the utility model;

[0034] Figure 7 yes Figure 6 A schematic diagram of the cross-sectional structure along the section line BB;

[0035] Figure 8It is a three-dimensional structural schematic diagram of the stirring limiting rod of the limiting shaft provided by the utility model;

[0036] Fig. 9 It is a side view cross-sectional structural schematic diagram of the silo provided by the utility model;

[0037] Fig.10 yes Fig. 9 A schematic diagram of the local enlarged structure at C in the middle;

[0038] Fig.11 It is a side view cross-sectional structural schematic diagram of the guide sleeve provided by the utility model;

[0039] Fig.12 It is a three-dimensional structural schematic diagram of the guide sleeve provided by the utility model.

[0040] Reference numerals:

[0041] 10. Material bin; 11. Material drop hole; 12. Guide hole;

[0042] 20. Support assembly; 21. Guide sleeve; 22. Fixing piece; 23. Circlip; 24. Connecting ring;

[0043] 30. Vibration assembly; 31. Connecting plate; 32. Vibrator; 33. Buffering muffler ring; 34. Connecting part; 35. U-shaped holder;

[0044] 40. Limiting shaft assembly; 41. Limiting shaft; 42. Stirring limiting rod; 43. Limiting section; 44. Dropping section; 45. Sealing surface; 46. Material guiding surface; 47. First limiting section; 48. Stirring section. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. 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.

[0046] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0047] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean 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, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0049] Combine the following Figures 1 to 12 It should be understood that the following description is only an illustrative embodiment of the present invention and does not constitute any limitation to the present invention.

[0050] like Figures 1 to 3 As shown, the powder dropping device includes a silo 10, a support assembly 20, a vibration assembly 30 and a limit shaft assembly 40. The bottom of the silo 10 is provided with a drop hole 11 connected to the inside of the silo 10. The support assembly 20 is sleeved on the outer peripheral surface of the silo 10 and movably cooperates with the silo 10 in the up and down directions. The vibration assembly 30 is connected to the silo 10, and the vibration assembly 30 is used to drive the silo 10 to vibrate in the up and down directions.

[0051] The limiting shaft assembly 40 includes a limiting shaft 41, and the limiting shaft 41 includes a limiting section 43 and a blanking section 44. The limiting section 43 is movably inserted in the blanking hole 11, and the limiting section 43 is connected to the upper end of the blanking section 44. The cross-sectional area of ​​the blanking section 44 is smaller than the cross-sectional area of ​​the blanking hole 11, and the cross-sectional area of ​​the limiting section 43 is greater than or equal to the cross-sectional area of ​​the blanking hole 11. The limiting shaft 41 is suitable for vibrating between a first position and a second position; in the first position, the limiting section 43 is in contact with the blanking hole 11 to block the blanking hole 11; in the second position, the limiting section 43 is away from the blanking hole 11, and the sample powder flows out through the gap between the blanking section 44 and the inner wall of the blanking hole 11.

[0052] The powder dropping device provided by the utility model drives the silo 10, the limit shaft assembly 40 and the sample powder in the silo 10 to vibrate in the up and down directions through the vibration assembly 30, so that the sample powder falls downward through the gap between the dropping section 44 and the inner wall of the dropping hole 11, completing the dropping of the sample powder. The powder dropping device provided by the utility model has the advantages of simple structure, precise control, convenient maintenance and low production cost, and can be used for the dropping needs of various medium powders.

[0053] It should be noted here that the first position is the lowest position of the limit shaft 41 during the up and down vibration process, and the second position is the highest position of the limit shaft 41 during the up and down vibration process.

[0054] In one embodiment of the present invention, Figure 3 As shown, the interior of the silo 10 is in a funnel shape that is larger at the top and smaller at the bottom. The central axis of the silo 10 is in the same straight line as the central axis of the drop hole 11. By adopting the funnel-shaped silo 10, the sample powder in the silo 10 can automatically fall into the drop hole 11, realizing automatic drop.

[0055] In one embodiment of the present invention, Figures 4 to 5 As shown, the limiting shaft 41 is a rod-shaped structure, the limiting shaft 41 is vertically arranged, and the central axis of the limiting shaft 41 is in the same straight line as the central axis of the blanking hole 11. The limiting section 43 and the blanking section 44 are integrally formed, the cross section of the limiting section 43 is circular, and the cross section of the blanking section 44 is rectangular or elliptical. When the vibration assembly 30 drives the silo 10 to vibrate in the up and down directions, the limiting section 43 vibrates up and down in the blanking hole 11, so that the limiting shaft 41 vibrates between the first position and the second position.

[0056] In one embodiment of the present invention, the blanking hole 11 is a circular hole, and two gaps are formed between the blanking section 44 and the inner wall of the blanking hole 11, and the two gaps are symmetrically arranged on both sides of the blanking section 44. Of course, the number of gaps is not limited to two, and can also be one, three or more, which is specifically determined according to the cross-sectional shape of the blanking section 44.

[0057] In one embodiment of the present invention, Figure 4As shown, a blocking surface 45 is formed at the connection between the limiting section 43 and the blanking section 44. Two blocking surfaces 45 are provided. The two blocking surfaces 45 are arranged symmetrically and are arranged horizontally. In this embodiment, the two blocking surfaces 45 have the same shape and are equal in size. Of course, the shapes of the two blocking surfaces 45 may also be different. Guide surfaces 46 are formed on both sides of the blanking section 44. The guide surfaces 46 are vertically arranged planes. The two guide surfaces 46 are arranged symmetrically. The guide surfaces 46 are connected to the blocking surfaces 45. A gap is formed between the guide surfaces 46 and the side wall of the blanking hole 11. In the first position, the blocking surface 45 fits with the edge of the blanking hole 11 to block the blanking hole 11. During the up and down vibration of the limiting shaft 41, the blocking surface 45 switches between the fitting state and the distance state with the blanking hole 11, so that the blanking hole 11 switches between the opening and closing state and the closed state.

[0058] In one embodiment of the present invention, Figures 9 and 10 As shown, a guide hole 12 is provided at the bottom of the silo 10. The guide hole 12 is a circular hole. The guide hole 12 is located below the blanking hole 11. The guide hole 12 is connected to the blanking hole 11. The inner diameter of the guide hole 12 is larger than the inner diameter of the blanking hole 11. The guide hole 12 and the blanking hole 11 are coaxially arranged.

[0059] In one embodiment of the present invention, Figures 4 to 5 As shown, a first limiting portion 47 is provided at the lower end of the blanking section 44. The first limiting portion 47 is a strip-shaped structure. The first limiting portion 47 is integrally formed with the blanking section 44. Of course, in order to facilitate installation and disassembly, the first limiting portion 47 can also be detachably connected to the blanking section 44. Specifically, the first limiting portion 47 is connected to the blanking section 44 by a pin or the first limiting portion 47 is connected to the blanking section 44 by a thread. The first limiting portion 47 is located in the guide hole 12, and the cross-sectional area of ​​the first limiting portion 47 is greater than the cross-sectional area of ​​the blanking hole 11. Since the cross-sectional area of ​​the first limiting portion 47 is greater than the cross-sectional area of ​​the blanking hole 11, when the limiting shaft 41 abuts against the lower edge of the blanking hole 11, the first limiting portion 47 limits the limiting shaft 41, preventing the limiting shaft 41 from continuing to move upward.

[0060] Furthermore, the first limiting portion 47 is arranged horizontally, and the end surfaces at both ends of the first limiting portion 47 are arranged as arc surfaces. During the up and down vibration process of the limiting shaft 41, the arc surfaces at both ends of the first limiting portion 47 slide and cooperate with the inner wall of the guide hole 12 in the up and down direction, which can guide the limiting shaft 41, ensure that the limiting shaft 41 is at the center position of the blanking hole 11, and make the limiting shaft 41 in a vertical state during the up and down vibration process.

[0061] In one embodiment of the present invention, Figures 6 to 8As shown, the limit shaft assembly 40 also includes a stirring limit rod 42, which is vertically arranged, and the lower end of the stirring limit rod 42 is connected to the limit section 43. Specifically, the lower end of the stirring limit rod 42 is provided with a plug-in hole, and the upper end of the limit shaft 41 has a plug-in portion, which is inserted into the plug-in hole, and the plug-in portion and the plug-in hole are interference fit, thereby realizing the fixed connection between the stirring limit rod 42 and the limit shaft 41. Alternatively, the lower end of the stirring limit rod 42 is provided with a plug-in portion, and the upper end of the limit shaft 41 has a plug-in hole, and the stirring limit rod 42 and the limit shaft 41 can also be connected by plugging the plug-in portion and the plug-in hole. Of course, the connection method of the stirring limit rod 42 and the limit shaft 41 is not limited to this, and the stirring limit rod 42 and the limit shaft 41 can also be connected by integral molding, welding or threaded connection.

[0062] The outer circumferential surface of the lower end of the stirring limit rod 42 is provided with a plurality of stirring parts 48 at intervals; the stirring parts 48 are in a sheet-like structure, and the size of each stirring part 48 is equal. Of course, the size and shape of each stirring part 48 can be different. The stirring parts 48 are arranged horizontally, and the distance between two adjacent stirring parts 48 is equal. In the first position, the stirring parts 48 abut against the inner wall of the silo 10. During the up and down vibration of the limit shaft 41, the stirring parts 48 vibrate up and down together with the limit shaft 41, thereby stirring the sample powder, ensuring that the coal sample is uniform and not easy to accumulate, and there is no residue after cleaning, and the next sample will not be contaminated.

[0063] In a preferred embodiment of the present invention, Figures 4 to 5 As shown, a second limiting portion is provided in the middle of the limiting section 43, the second limiting portion is annular, and the second limiting portion and the limiting section 43 are integrally formed. When the stirring limit rod 42 is installed in place, the lower end of the stirring limit rod 42 abuts against the second limiting portion, and the second limiting portion plays a limiting role on the stirring limit rod 42.

[0064] It should be noted that the specific structural form of the second limit portion is not limited to a ring, and can also be a limit block, a limit rod or other structural forms. The connection between the second limit portion and the limit section 43 is not limited to integral molding, and can also be welded, plugged or other connection methods.

[0065] In one embodiment of the present invention, Figure 3 , Fig.11 and Fig.12As shown, the support assembly 20 includes a guide sleeve 21 and a fixing member 22. The guide sleeve 21 is annular and is sleeved on the outer peripheral surface of the silo 10, and is movably matched with the silo 10 in the up-down direction. Specifically, during the vibration of the silo 10 in the up-down direction, the guide sleeve 21 and the silo 10 slide and match in the up-down direction. By adopting the sliding cooperation between the guide sleeve 21 and the silo 10 in the up-down direction, the silo 10 can only move in a certain range in the axial direction of the guide sleeve 21 (i.e., the up-down direction) during vibration, so that the falling materials fall in a certain range and will not be scattered everywhere.

[0066] The fixing member 22 is connected to the guide sleeve 21, and is used to fix the guide sleeve 21. In this embodiment, the fixing member 22 is a plate-like structure, and is provided with a circular hole. The fixing member 22 is sleeved on the outer periphery of the guide sleeve 21. The fixing member 22 is connected to a base or other equipment to fix the powder dropping device.

[0067] Furthermore, a connecting ring 24 is provided on the outer circumferential surface of the guide sleeve 21, the connecting ring 24 extends along the circumferential direction of the guide sleeve 21, the connecting ring 24 is horizontally arranged and is located above the fixing member 22, the connecting ring 24 is provided with a through hole, and the connecting ring 24 is connected to the fixing member 22 via a bolt in the through hole. Of course, the connection method between the connecting ring 24 and the fixing member 22 is not limited thereto, and a clamping member or a buckle connection may also be used.

[0068] It should be noted that the specific structural form of the fixing member 22 is not limited to a plate-like structure, and a bracket or other structural forms may also be adopted.

[0069] In one embodiment of the present invention, Figure 3 As shown, the support assembly 20 includes a limiter, which is connected to the silo 10 and is located below the guide sleeve 21, and the limiter and the guide sleeve 21 are spaced apart. Since the limiter and the guide sleeve 21 are spaced apart by a certain distance, the silo 10 has a certain movable distance in the up and down directions. During the up and down vibration of the silo 10, when the silo 10 is at the lowest position, the limiter is away from the bottom surface of the guide sleeve 21; when the silo 10 is at the highest position, the limiter abuts against the bottom surface of the guide sleeve 21, thereby limiting the silo 10. In addition to limiting the silo 10, the limiter also serves as an anti-slip mechanism for the silo 10 to prevent the mechanism from failing.

[0070] In a specific embodiment of the present invention, Figure 3As shown, the limiter includes a spring 23, which is elastic. A slot is provided on the outer peripheral surface of the silo 10, and the spring 23 is clamped in the slot. During the assembly process, the spring 23 only needs to be clamped in the slot, and no other fasteners are needed for fixing. The limiter using the spring 23 structure has the advantages of simple structure and easy installation. Of course, the specific structure of the limiter is not limited to the spring 23, and a limit screw or a limit block structure can also be used.

[0071] In one embodiment of the present invention, Figure 3 As shown, the vibration assembly 30 includes a connecting plate 31 and a vibrator 32. The connecting plate 31 is connected to the silo 10. Specifically, the connecting plate 31 is provided with a through hole. The connecting plate 31 is sleeved on the outer periphery of the silo 10. The connecting plate 31 is connected to the silo 10 by bolts. The vibrator 32 is provided on the connecting plate 31, and the vibrator 32 is used to drive the silo 10 to vibrate in the up and down directions. In this embodiment, two vibrators 32 are provided, and the two vibrators 32 are symmetrically arranged. The vibration amplitude and frequency of the vibrator 32 can be controlled by electric current. When working, the vibrator 32 can be adjusted steplessly according to different coal samples and required weight to ensure controllable falling efficiency and weight.

[0072] In a specific embodiment of the present invention, Figure 3 As shown, two connecting parts 34 are provided on the side of the connecting plate 31, and the connecting parts 34 are integrally formed with the connecting plate 31, and the two connecting parts 34 are symmetrically arranged. Two vibrators 32 are arranged on the connecting plate 31 in a one-to-one correspondence. Preferably, a U-shaped holder 35 is provided on the connecting part 34, and the U-shaped holder 35 is connected to the connecting part 34 by bolts, and the vibrator 32 is clamped between the U-shaped holder 35 and the connecting part 34.

[0073] In a preferred embodiment of the present invention, Figure 3 As shown, the vibration assembly 30 also includes a buffer muffler ring 33, and the material of the buffer muffler ring 33 is a flexible material; specifically, the material of the buffer muffler ring 33 is rubber or silicone. The outer peripheral surface of the silo 10 has a contact surface, which is horizontally arranged and located above the guide sleeve 21. The buffer muffler ring 33 is sleeved on the outer peripheral surface of the silo 10 and is located between the contact surface and the upper surface of the guide sleeve 21. When the silo 10 vibrates, by arranging the buffer muffler ring 33 between the silo 10 and the guide sleeve 21, the buffer muffler ring 33 can avoid collision between the silo 10 and the guide sleeve 21, reduce noise generation, and ensure reliable and smooth operation of the powder dropping device.

[0074] Working principle of the powder dropping device: Before the powder dropping device is operated, coal sample powder is first loaded into the silo 10. When the powder dropping device stops working, the limiting section 43 completely blocks the dropping hole 11, so that the coal sample powder cannot fall.

[0075] When the powder dropping device is working, the vibrator 32 starts to vibrate, and the vibrator 32 drives the hopper 10 to vibrate up and down through the connecting plate 31. The hopper 10 drives the coal sample powder and the stirring limit rod 42 and the limit shaft 41 to vibrate. As the stirring limit rod 42 and the limit shaft 41 continue to vibrate up and down, the drop hole 11 continuously switches between opening and closing, and the vibrated coal sample powder falls through the gap between the drop section 44 and the inner wall of the drop hole 11, thereby completing the drop.

[0076] By adjusting the vibration frequency and amplitude of the vibrator 32, the number of times and the size of the opening and closing of the gap between the blanking section 44 and the inner wall of the blanking hole 11 per unit time can be changed, so as to achieve precise control of the speed of the coal sample powder. When the required weight is reached, the vibrator 32 stops vibrating, the blanking section 44 blocks the blanking hole 11, and the blanking stops.

[0077] It should be noted that the technical solutions in various embodiments of the present utility model can be combined with each other, but the basis for the mutual combination is that it can be implemented by ordinary technicians in the field; when the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist, that is, it does not belong to the protection scope of the present utility model.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A powder feeding device, characterized in that: include: A material bin (10), wherein the bottom of the material bin (10) is provided with a material drop hole (11) communicating with the interior of the material bin (10); A support assembly (20) is sleeved on the outer peripheral surface of the silo (10) and is movably matched with the silo (10) in the up and down directions; A vibration component (30) connected to the silo (10), the vibration component (30) being used to drive the silo (10) to vibrate in an up-and-down direction; A limiting shaft assembly (40) comprises a limiting shaft (41), wherein the limiting shaft (41) comprises a limiting section (43) and a blanking section (44), wherein the limiting section (43) is movably inserted into the blanking hole (11), wherein the limiting section (43) is connected to the upper end of the blanking section (44), wherein the cross-sectional area of ​​the blanking section (44) is smaller than the cross-sectional area of ​​the blanking hole (11), and the cross-sectional area of ​​the limiting section (43) is greater than or equal to the cross-sectional area of ​​the blanking hole (11); wherein the limiting shaft (41) is suitable for vibrating between a first position and a second position; wherein in the first position, the limiting section (43) is in contact with the blanking hole (11) to block the blanking hole (11); and wherein in the second position, the limiting section (43) is away from the blanking hole (11), and the sample powder flows out through the gap between the blanking section (44) and the inner wall of the blanking hole (11).

2. The powder dropping device according to claim 1, characterized in that: A blocking surface (45) is formed at the connection between the limiting section (43) and the blanking section (44), and guide surfaces (46) are formed on both sides of the blanking section (44). The guide surfaces (46) are connected to the blocking surfaces (45), and the gap is formed between the guide surfaces (46) and the side wall of the blanking hole (11); in the first position, the blocking surface (45) is in contact with the edge of the blanking hole (11).

3. The powder dropping device according to claim 1, characterized in that: A guide hole (12) is provided at the bottom of the silo (10), the guide hole (12) is located below the material drop hole (11), and the guide hole (12) is communicated with the material drop hole (11).

4. The powder dropping device according to claim 3, characterized in that: A first limiting portion (47) is provided at the lower end of the blanking section (44), the first limiting portion (47) is located in the guide hole (12), and the cross-sectional area of ​​the first limiting portion (47) is greater than the cross-sectional area of ​​the blanking hole (11).

5. The powder dropping device according to any one of claims 1 to 4, characterized in that: The limiting shaft assembly (40) further comprises: A stirring limit rod (42), the lower end of which is connected to the limit section (43), and a plurality of stirring portions (48) are arranged at intervals on the outer peripheral surface of the lower end of the stirring limit rod (42); in the first position, the stirring portion (48) abuts against the inner wall of the silo (10).

6. The powder dropping device according to any one of claims 1 to 4, characterized in that: The support assembly (20) comprises: A guide sleeve (21), the guide sleeve (21) being sleeved on the outer peripheral surface of the material bin (10) and movably matched with the material bin (10) in the up and down directions; A fixing member (22) is connected to the guide sleeve (21).

7. The powder dropping device according to claim 6, characterized in that: The support assembly (20) comprises: A limiting member is connected to the material bin (10) and is located below the guide sleeve (21), and the limiting member and the guide sleeve (21) are spaced apart.

8. The powder dropping device according to claim 7, characterized in that: The limiting member comprises a retaining spring (23), the outer peripheral surface of the material bin (10) is provided with a retaining groove, and the retaining spring (23) is retained in the retaining groove.

9. The powder dropping device according to claim 7, characterized in that: The vibration assembly (30) comprises: A connecting plate (31), wherein the connecting plate (31) is connected to the silo (10); A vibrator (32) is arranged on the connecting plate (31), and the vibrator (32) is used to drive the silo (10) to vibrate in the up and down directions.

10. The powder dropping device according to claim 9, characterized in that: The vibration assembly (30) further comprises: A buffer silencer ring (33), wherein the buffer silencer ring (33) is made of a flexible material, the outer peripheral surface of the silo (10) has a contact surface, the buffer silencer ring (33) is sleeved on the outer peripheral surface of the silo (10), and is located between the contact surface and the upper surface of the guide sleeve (21).

Images