Quantitative division device for sample preparation

Abstract

The utility model relates to the technical field of sample preparation division, in particular to a quantitative division device for sample preparation. The quantitative division device comprises a material guiding mechanism, a material supporting mechanism, a telescopic mechanism and a discharging mechanism, the material guiding mechanism is arranged on a circulation path of samples to be subjected to quantitative division, a division cavity is formed in the material guiding mechanism, and the division cavity is used for quantitatively containing the division samples on the circulation path; the material supporting mechanism is movably mounted at the bottom of the division cavity, and the material supporting mechanism supports the division sample in the division cavity when blocking the division cavity; the telescopic mechanism is used for driving the guide mechanism to move in the telescopic direction; the discharging mechanism is arranged on the side, away from the telescopic mechanism, of the material supporting mechanism, and the discharging mechanism is used for limiting the material supporting mechanism when the material guiding mechanism moves, so that the division sample blocked in the division cavity flows out. According to the quantitative division device, quantitative automatic division of the sample can be realized based on the telescopic action of the telescopic mechanism, and the quantitative division efficiency and accuracy of the sample are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of sample preparation and division, and particularly relates to a sample preparation and quantitative division device. BACKGROUND

[0002] Sample division refers to the process of randomly reducing the mass under the condition of unchanged particle size to achieve the required material mass for detection and inspection. In the metal smelting, heat treatment, power generation and other industries, sample division is a key procedure in the sample preparation process, and the purpose is to reduce a large amount of original sample to a small part with representativeness, so as to reduce the subsequent work load, reduce the sample amount and meet the required sampling amount for inspection.

[0003] Quantitative division is a sample division process, which is a division method that retains a certain mass of sample and is independent of the mass of the divided sample, that is, the weight of the retained sample after division is a certain value, and the division ratio can be adjusted according to the setting before division. At present, in the implementation of the quantitative division process of the sample, the sample is divided by using the four division method, and the four division method is repeatedly divided to meet the required weight requirement, which is large in workload, low in efficiency and large in consumption of manpower and material resources. UTILITY MODEL CONTENT

[0004] In view of the above technical problems, the utility model provides a sample preparation and quantitative division device, which can automatically realize the quantitative division of the sample and improve the efficiency and accuracy of the sample quantitative division.

[0005] The utility model embodiment provides the following scheme:

[0006] The utility model embodiment provides a sample preparation and quantitative division device, and the device comprises:

[0007] The material guide mechanism is arranged on the flow path of the sample to be quantitatively divided, and the material guide mechanism is provided with a division cavity.

[0008] The material supporting mechanism is movably installed at the bottom of the division cavity, and the material supporting mechanism supports the divided sample in the division cavity when the division cavity is blocked.

[0009] The telescopic mechanism is connected with the material guide mechanism, and the telescopic mechanism is used for driving the material guide mechanism to move in the telescopic direction.

[0010] The discharging mechanism is arranged on the side of the material supporting mechanism away from the telescopic mechanism, and the discharging mechanism is used for limiting the material supporting mechanism when the material guide mechanism moves, so that the divided sample blocked in the division cavity flows out.

[0011] In an optional embodiment, the material guide mechanism comprises:

[0012] The movable plate is provided with at least one first pipe hole in the vertical direction of the movable plate;

[0013] The at least one first material guide pipe is installed in the first pipe hole, and the first material guide pipe forms a shrinkage cavity when the material supporting mechanism seals the bottom of the first material guide pipe.

[0014] In an alternative embodiment, the material guide mechanism further comprises:

[0015] The second material guide pipe is installed in the second pipe hole provided in the vertical direction of the movable plate, and the second material guide pipe is used to keep the flow path unobstructed when the sample shrinkage device performs sample shrinkage.

[0016] In an alternative embodiment, the material supporting mechanism comprises:

[0017] The at least one sliding rail is installed at the bottom of the movable plate of the material guide mechanism in the telescopic direction;

[0018] The blocking plate is connected with the sliding rail.

[0019] In an alternative embodiment, the blocking plate comprises:

[0020] The horizontal section is connected with the sliding rail;

[0021] The vertical section is connected with the horizontal section, and the vertical section is used to limit the material supporting mechanism when the material guide mechanism moves in the telescopic direction.

[0022] In an alternative embodiment, the material supporting mechanism further comprises:

[0023] The first limiting component is installed on one side of the horizontal section close to the material discharging mechanism;

[0024] The second limiting component is installed on one side of the vertical section close to the telescopic mechanism.

[0025] In an alternative embodiment, the material discharging mechanism comprises:

[0026] The fixed plate is arranged on the side of the material supporting mechanism as a limiting end for limiting the material supporting mechanism, and the fixed plate is provided with at least one discharging through hole;

[0027] The at least one discharging guide pipe is installed on the fixed plate to communicate with the corresponding discharging through hole.

[0028] In an alternative embodiment, the material discharging mechanism further comprises:

[0029] The support is arranged on the fixed plate;

[0030] The at least one air jet nozzle is installed on the support to jet high-pressure air into the discharging guide pipe.

[0031] In an alternative embodiment, the material discharging mechanism further comprises:

[0032] The reset spring has one end connected with the fixed plate and the other end connected with the blocking plate of the material supporting mechanism, so as to reset the blocking plate of the material supporting mechanism when the telescopic mechanism is retracted.

[0033] In an alternative embodiment, the telescopic mechanism comprises:

[0034] A bottom plate;

[0035] A guide rail cylinder is installed on the bottom plate, and the telescopic end of the guide rail cylinder is connected with the movable plate of the material guiding mechanism.

[0036] Compared with the prior art, the quantitative sample splitting device has the following advantages:

[0037] The quantitative sample splitting device comprises a material guiding mechanism, a material supporting mechanism, a telescopic mechanism and a material discharging mechanism. The material guiding mechanism is provided on a flow path of the sample to be quantitatively split, and the material guiding mechanism is provided with a splitting cavity. The material supporting mechanism is movably installed at the bottom of the splitting cavity, and supports the split sample in the splitting cavity when the splitting cavity is blocked. The telescopic mechanism is connected with the material guiding mechanism, and is used to drive the material guiding mechanism to move in the telescopic direction. The material discharging mechanism is provided on the side of the material supporting mechanism away from the telescopic mechanism, and is used to limit the material supporting mechanism when the material guiding mechanism moves, so that the split sample blocked in the splitting cavity flows out. The quantitative sample splitting device can realize automatic quantitative splitting of the sample based on the telescopic action of the telescopic mechanism, eliminates the error of manual operation splitting, and further improves the efficiency and accuracy of sample quantitative splitting. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present specification or the prior art, the drawings needed in the embodiments will be briefly introduced below.

[0039] Figure 1 The first structure schematic view of the front of the quantitative sample splitting device provided by the embodiment of the present utility model;

[0040] Figure 2 The second structure schematic view of the front of the quantitative sample splitting device provided by the embodiment of the present utility model;

[0041] Figure 3 The first structure schematic view of the back of the quantitative sample splitting device provided by the embodiment of the present utility model;

[0042] Figure 4The second structure schematic view of the quantitative division device is provided for the embodiments of the utility model.

[0043] Mark explanation: 1- material guide mechanism, 2- material supporting mechanism, 3- telescopic mechanism, 4- material outlet mechanism;

[0044] 11- division cavity, 12- movable plate, 13- first material guide pipe, 14- second material guide pipe;

[0045] 21- blocking plate, 22- slide rail, 23- horizontal section, 24- vertical section, 25- first limiting component, 26- second limiting component;

[0046] 31- bottom plate, 32- guide rail air cylinder, 33- third limiting component, 34- sample through hole;

[0047] 41- fixed plate, 42- limiting end, 43- blanking through hole, 44- blanking guide pipe, 45- support, 46- air jet nozzle, 47- return spring. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art belong to the protection scope of the embodiments of the utility model.

[0049] The quantitative division device described in the embodiments of the utility model can be applied to the quantitative division processing of dry solid samples. The sample division is more accurate when the particle size is between 5 mesh and 100 mesh. The following will take the quantitative division of soil detection as an example to specifically describe the scheme.

[0050] Please refer to Figure 1 , Figure 1 The structure schematic view of the quantitative division device for sample preparation is provided for the embodiments of the utility model. The quantitative division device comprises a material guide mechanism 1, a material supporting mechanism 2, a telescopic mechanism 3 and a material outlet mechanism 4.

[0051] The material guide mechanism 1 is arranged on the flow path of the sample to be quantitatively divided. The material guide mechanism 1 is provided with a division cavity 11. The division cavity 11 is used for quantitatively containing the division sample on the flow path. The material guide mechanism 1 is used for guiding the sample flow and temporarily storing the division sample, Figure 1 The arrow F1 shown in the middle is the flow path of the sample. The sample can flow into the division cavity 11 through the hopper outlet. The division cavity 11 can be a through hole opened on the plate body or a cylindrical material pipe, which can contain the division sample. The material guide mechanism 1 can quantitatively intercept a certain amount of division sample according to the required division ratio during the continuous flow of the sample through the flow path.

[0052] The material supporting mechanism 2 can be a plate body, which is movably installed at the bottom of the segmentation cavity 11 and supports the segmented sample in the segmentation cavity 11 when the segmentation cavity 11 is blocked. The movable installation of the material supporting mechanism 2 can be based on a linear guide rod structure or a dovetail groove structure, etc. When the material supporting mechanism 2 is in a state of blocking the bottom of the segmentation cavity 11, it can support the segmented sample that has been cut off in the segmentation cavity 11, preventing the segmented sample from leaking when the discharge condition is not reached.

[0053] The telescopic mechanism 3 can be an electric telescopic rod, a hydraulic rod, etc., which can realize the telescopic function. The telescopic mechanism 3 is connected with the material guiding mechanism 1, and is used to drive the material guiding mechanism 1 to move in the telescopic direction. The telescopic mechanism 3 can accurately drive the material guiding mechanism 1 to stably move in the telescopic direction according to a preset program. For example, a high-precision linear telescopic motion can be realized by a motor driving a screw nut structure, and the displacement accuracy can reach millimeter level. The stroke of each telescopic action perfectly matches the opening and closing of the segmentation cavity 11 and the flow rhythm of the sample, so that the sample quantitatively filled in the segmentation cavity 11 can be separated out according to the predetermined scheme.

[0054] The discharge mechanism 4 is arranged on the side of the material supporting mechanism 2 away from the telescopic mechanism 3, and is used to limit the material supporting mechanism 2 when the material guiding mechanism 1 moves, so that the segmented sample blocked in the segmentation cavity 11 flows out. When the material guiding mechanism 1 moves to a specific position according to the instruction of the telescopic mechanism 3, the discharge mechanism 4 limits the material supporting mechanism 2, prevents it from moving synchronously with the material guiding mechanism 1, breaks the blocking state of the material supporting mechanism 2 on the bottom of the segmentation cavity 11, and makes the segmented sample originally closed in the segmentation cavity 11 flow out under the action of gravity, which can flow into the corresponding collection container for subsequent detection and processing.

[0055] The working process of the quantitative segmentation device will be described below. When the telescopic mechanism 3 is in the retracted state, the sample to be quantitatively segmented flows into the segmentation cavity 11 of the material guiding mechanism 1 through the flow path F1, the telescopic mechanism 3 drives the material guiding mechanism 1 to move in the extension direction F2, so that the material supporting mechanism 2 abuts against the discharge mechanism 4, the material supporting mechanism 2 stops moving, and the material guiding mechanism 1 still moves in the extension direction F2, the bottom of the segmentation cavity 11 is gradually opened, until the sample in the segmentation cavity 11 flows into the discharge mechanism 4, and the quantitative segmentation is completed. The telescopic mechanism 3 moves in the retraction direction F3 to facilitate the quantitative segmentation of the sample again. It should be noted that the telescopic mechanism 3 can also be controlled to run a preset number of times based on the segmentation amount of the sample to quantitatively segment the sample to be segmented.

[0056] Exemplarily, the material guiding mechanism 1 comprises a movable plate 12 and at least one first material guiding pipe 13. The movable plate 12 is provided with at least one first pipe hole penetrating in the vertical direction thereof; the first material guiding pipe 13 is installed in the first pipe hole, and the first material guiding pipe 13 forms the division cavity 11 when the bottom thereof is blocked by the material supporting mechanism 2. Please continue to refer to Figure 1 , the movable plate 12 is provided with two first pipe holes in the drawing, which are arranged in the width direction of the movable plate 12 and are spaced apart, and the movable plate 12 can be manufactured by metal material processing; the first material guiding pipe 13 is embedded and installed in the first pipe hole, and the samples in the two flow paths can be simultaneously quantitatively divided. When the bottom of the first material guiding pipe 13 is blocked by the material supporting mechanism 2, the division cavity 11 can be formed in the first material guiding pipe 13. The pipe diameter, length and smoothness of the inner wall of the first material guiding pipe 13 can be designed based on actual needs, and the pipe diameter is matched according to the flow and particle characteristics of the samples to be divided, which is not specifically limited here.

[0057] In actual application, when the samples are quantitatively divided based on the first material guiding pipe 13, there may be flowing samples in the flow path, which may cause interruption of the flow of the samples. Based on this, in a specific embodiment, the material guiding mechanism 1 further comprises a second material guiding pipe 14.

[0058] The second material guiding pipe 14 is installed in the second pipe hole penetratingly arranged in the vertical direction of the movable plate 12, and the second material guiding pipe 14 is used to keep the flow path unblocked when the sample is divided by the quantitative division device. The bottom of the second material guiding pipe 14 is not blocked by the material supporting mechanism 2, so that the sample can be discharged through the flow path, and thus the quantitative division can be performed at an appropriate time in the sample based on actual needs, or the quantitative division can be performed multiple times on a batch of samples. Similarly, Figure 1 two second material guiding pipes 14 arranged side by side are shown in the drawing, and each second material guiding pipe 14 can keep the corresponding sample flow path unblocked when the material guiding mechanism 1 is driven to move by the telescopic mechanism 3, so that the sample continues to flow to the next processing station.

[0059] Exemplarily, please refer to Figure 2 , Figure 2 is a second structure diagram of the front of the quantitative division device, and the material supporting mechanism 2 comprises a blocking plate 21 and at least one sliding rail 22.

[0060] The sliding rail 22 is installed at the bottom of the movable plate 12 of the material guiding mechanism 1 in the telescopic direction; the blocking plate 21 is connected with the sliding rail 22. The sliding rail 22 has high precision, which can guarantee the sliding precision of the blocking plate 21, the blocking plate 21 is accurately embedded in the bottom of the first material guiding pipe 13 to realize blocking under the driving of the sliding rail 22, and can withstand a certain sample impact force in the blocked state to prevent sample leakage, reliably supports the sample in the division cavity 11, and the material supporting mechanism 2 cooperates with the material guiding mechanism 1, the telescopic mechanism 3 and the like to guarantee the accuracy and efficiency of the quantitative division work.

[0061] As shown in Figure 1 and Figure 3 , the blocking plate 21 includes a horizontal section 23 and a vertical section 24. The horizontal section 23 is connected with the slide rail 22; the vertical section 24 is connected with the horizontal section 23, and is used for limiting the supporting material mechanism 2 when the material guiding mechanism 1 moves in the telescopic direction. The horizontal section 23 is used for blocking the bottom of the first material guiding pipe 13, and the vertical section 24 is used for abutting against the discharging mechanism 4 for limiting.

[0062] Further, the supporting material mechanism 2 further includes a first limiting assembly 25 and a second limiting assembly 26. The first limiting assembly 25 is installed on one side of the horizontal section 23 close to the discharging mechanism 4; the second limiting assembly 26 is installed on one side of the vertical section 24 close to the telescopic mechanism 3. The first limiting assembly 25 and the second limiting assembly 26 can be set as adjustable screw structures, and different distances of limiting can be implemented based on the extension length of the screw. Please refer to Figure 2 and Figure 3 , the position of the blocking plate 21 can be adjusted by the first limiting assembly 25, so as to accurately block the bottom of the first material guiding pipe 13; the second limiting assembly 26 is used for adjusting the limiting position of the blocking plate 21 when it moves in the extension direction F2, so that the sample in the first material guiding pipe 13 can timely flow out to the discharging mechanism 4.

[0063] Exemplarily, please refer to Figure 3 and Figure 4 , the telescopic mechanism 3 includes a bottom plate 31 and a guide rail cylinder 32. The bottom plate 31 is a basic load-bearing component of the telescopic mechanism 3, and is provided with a sample through hole 34 and a third limiting assembly 33. The extension stroke of the guide rail cylinder 32 can be adjusted by the third limiting assembly 33. The guide rail cylinder 32 is installed on the bottom plate 31, and the extension end of the guide rail cylinder 32 is connected with the movable plate 12 of the material guiding mechanism 1. Of course, the cylinder stroke can also be adjusted based on the oil buffer on the guide rail cylinder 32, so as to ensure the accurate extension position of the guide rail cylinder 32, thereby ensuring the accurate position of the movable plate 12.

[0064] Exemplarily, the discharging mechanism 4 includes a fixed plate 41 and at least one discharging guide pipe 44. The fixed plate 41 is arranged close to the side surface of the supporting material mechanism 2 as a limiting end 42 for limiting the supporting material mechanism 2, and the limiting end 42 is used for abutting against the blocking plate 21 for limiting. The fixed plate 41 is provided with at least one discharging through hole 43; the discharging through hole 43 is used for installing the discharging guide pipe 44 to communicate with the corresponding discharging through hole 43. The fixed plate 41 is a main supporting part of the discharging mechanism 4, and can be made of carbon steel or aluminum alloy. The quantitatively divided sample can be conveyed to a preset position by the discharging guide pipe 44, so as to implement quantitative collection.

[0065] In practical applications, after the soil sample is quantitatively divided, the powder sample may be attached to the falling material through hole 43 and the falling material guide pipe 44, which is easy to cause cross contamination between different samples. Based on this, in a specific embodiment, the discharging mechanism 4 further comprises a bracket 45 and at least one air jet nozzle 46.

[0066] The bracket 45 is erected on the fixed plate 41; the air jet nozzle 46 is installed on the bracket 45 and located above the falling material guide pipe 44 to spray high-pressure air into the falling material guide pipe 44. When it is necessary to clean the falling material through hole 43 and the falling material guide pipe 44, high-pressure air can be output from the air jet nozzle 46 to clean the residual sample on the pipe wall through high-pressure airflow impact, preventing cross contamination between different samples.

[0067] Further, the discharging mechanism 4 further comprises a reset spring 47. As shown in Figure 1 the utility model embodiment adopts two reset springs 47 to reset the blocking plate 21, one end of each reset spring 47 is connected with the fixed plate 41, and the other end is connected with the blocking plate 21 of the material supporting mechanism 2, so as to reset the blocking plate 21 when the telescopic mechanism 3 retracts. The reset spring 47 can be selected as a tension spring with stable and appropriate elastic coefficient. When the telescopic mechanism 3 starts to retract after completing the process of driving the material guide mechanism 1 to move outward, realizing sample division and discharging, the reset spring 47 pulls the blocking plate 21 to slide under the action of its own elastic force. The bottom of the division cavity 11 is re-sealed, which prepares for the next accurate quantitative division operation, greatly improves the automation and stability of the device operation, and guarantees the efficient and continuous operation of the entire quantitative division process. In order to guarantee the reliability of the reset spring 47, a travel switch can be installed on the movable plate 12 to detect the failure of the reset spring 47.

[0068] The technical scheme provided in the utility model embodiment has at least the following technical effects or advantages:

[0069] The quantitative division device comprises a material guide mechanism, a material supporting mechanism, a telescopic mechanism and a discharging mechanism. The material guide mechanism is arranged on a flow path of a sample to be quantitatively divided. The material guide mechanism is provided with a division cavity for quantitatively containing the sample to be divided on the flow path. The material supporting mechanism is movably installed at the bottom of the division cavity and supports the sample to be divided in the division cavity when the division cavity is sealed. The telescopic mechanism is connected with the material guide mechanism and drives the material guide mechanism to move in the telescopic direction. The discharging mechanism is arranged on the side of the material supporting mechanism away from the telescopic mechanism and limits the material supporting mechanism when the material guide mechanism moves, so that the sample to be divided sealed in the division cavity flows out. The quantitative division device can realize automatic quantitative division of the sample based on the telescopic action of the telescopic mechanism, eliminate the error of manual operation division, and further improve the efficiency and accuracy of sample quantitative division.

[0070] In the present application, unless specifically defined and limited otherwise, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0071] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0072] In the present application, unless specifically defined and limited otherwise, the terms "connected", "fixed", and the like should be broadly understood, for example, "fixed" can be fixed connection, or detachable connection, or integral; "connected" can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be internal connection of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0073] In addition, in the present application, the description such as "first", "second", etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless specifically defined otherwise.

Claims

1. A sample preparation quantitative split device, characterized by, The device comprises: a material guiding mechanism arranged on a flow path of a sample to be quantitatively divided, the material guiding mechanism being provided with a division cavity for quantitatively containing the sample to be divided on the flow path; a material supporting mechanism movably mounted on the bottom of the division cavity, the material supporting mechanism supporting the sample to be divided in the division cavity when the division cavity is blocked; a telescopic mechanism connected with the material guiding mechanism, the telescopic mechanism being used to drive the material guiding mechanism to move in the telescopic direction; a material discharging mechanism arranged on the side of the material supporting mechanism away from the telescopic mechanism, the material discharging mechanism being used to limit the material supporting mechanism when the material guiding mechanism moves, so that the sample to be divided blocked in the division cavity flows out.

2. The sample preparation and quantitative dividing apparatus according to claim 1, wherein The material guiding mechanism comprises: a movable plate provided with at least one first tube hole penetrating in the vertical direction of the movable plate; at least one first material guiding tube mounted in the first tube hole, the first material guiding tube forming the division cavity when the bottom of the first material guiding tube is blocked by the material supporting mechanism.

3. The sample preparation and quantitative dividing apparatus according to claim 2, wherein The material guiding mechanism further comprises: a second material guiding tube mounted in a second tube hole penetrating in the vertical direction of the movable plate, the second material guiding tube being used to keep the flow path unblocked when the sample is divided by the quantitative division device.

4. The sample preparation and quantitative dividing apparatus according to claim 1, wherein The material supporting mechanism comprises: at least one slide rail mounted on the bottom of the movable plate of the material guiding mechanism in the telescopic direction; a blocking plate connected with the slide rail.

5. The sample preparation and quantitative dividing apparatus according to claim 4, wherein The blocking plate comprises: a horizontal section connected with the slide rail; a vertical section connected with the horizontal section, the vertical section being used to limit the material supporting mechanism when the material guiding mechanism moves in the telescopic direction.

6. The sample preparation and quantitative dividing apparatus according to claim 5, wherein The material supporting mechanism further comprises: a first limiting component mounted on the side of the horizontal section close to the material discharging mechanism; a second limiting component mounted on the side of the vertical section close to the telescopic mechanism.

7. The sample preparation and quantitative dividing apparatus according to claim 1, wherein The material discharging mechanism comprises: a fixed plate configured as a limiting end for limiting the material supporting mechanism on the side of the material supporting mechanism, the fixed plate being provided with at least one material discharging through hole; at least one material discharging guide tube mounted on the fixed plate to communicate with the corresponding material discharging through hole.

8. The sample preparation and quantitative dividing apparatus according to claim 7, wherein The material discharging mechanism further comprises: a bracket erected on the fixed plate; at least one air jet nozzle mounted on the bracket to jet high-pressure air into the material discharging guide tube.

9. The sample preparation and quantitative dividing apparatus according to claim 7, wherein, The material discharging mechanism further comprises: a reset spring having one end connected with the fixed plate and the other end connected with the blocking plate of the material supporting mechanism, so as to reset the blocking plate of the material supporting mechanism when the telescopic mechanism retracts.

10. The sample preparation and quantitative dividing apparatus according to claim 1, wherein, The telescopic mechanism comprises: a bottom plate; a guide rail air cylinder mounted on the bottom plate, the telescopic end of the guide rail air cylinder being connected with the movable plate of the material guiding mechanism.

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