A powder sample quantitative dispensing shovel

Abstract

This utility model relates to a quantitative sampling shovel for powdered samples, comprising a shell, a linkage assembly with a gripping part, a fixed shaft, a first curved arm, a second curved arm, a baffle, and a bucket. The fixed shaft is vertically fixed to the inner surface of the shell. The linkage assembly is disposed inside the shell and moves up and down under the action of hand force. The upper end of the first curved arm is hinged to the linkage assembly, and a first through hole is provided near the upper end of the first curved arm. The baffle is fixed to the lower end of the first curved arm. The upper end of the second curved arm is hinged to the linkage assembly, and a second through hole is provided near the upper end of the second curved arm. The bucket is fixed to the lower end of the second curved arm. The fixed shaft passes through the first and second through holes, and the opening of the bucket faces the baffle. The advantages of this utility model are: 1. Improved sampling accuracy and representativeness; 2. Reduced human error; 3. Improved work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of sampling equipment technology, and in particular to a quantitative sampling spatula for powder samples. Background Technology

[0002] After sample preparation and grinding, manual sample grid reduction is an important manual reduction technique to ensure sample representativeness. It is mainly suitable for powdery or small particle samples. The sample shovel is an indispensable tool in the manual sample grid reduction process. Correct selection and use are key to ensuring the representativeness of the samples obtained by manual sample grid reduction.

[0003] The manual sample reduction method is performed as follows: a) After grinding, the sample is laid flat on a smooth plate in a rectangular shape, with a thickness of less than 5 mm; b) Divide the laid sample layer into small grids of similar size, with a total of 4*5 grids or more; c) Select a sample shovel and take a sample of approximately equal mass from each grid of the laid sample layer (the sampling position is randomly selected in each grid); d) Insert a smooth baffle vertically into each grid of sample, all the way to the bottom. The sample shovel is inserted to the bottom of the sample to collect the sample, and then moved horizontally until its open end contacts the baffle, ensuring that all the sample above the mating surface is collected; e) Lift the sample shovel and baffle together, ensuring that no sample spills from the sample shovel.

[0004] Due to human error or subjective judgment, it is difficult to accurately control the amount of material sampled at one time. Failure to collect samples from the bottom during sampling can affect the representativeness of the sample, leading to deviations in quality inspection results. Therefore, the development and use of more reasonable and standardized sampling equipment is the preferred option to avoid quality inspection deviations. Utility Model Content

[0005] To address the aforementioned issues, the present invention aims to provide a quantitative sampling spatula for powdered samples, which can avoid unnecessary contact between personnel and samples during sampling operations and prevent the sample from not reaching the bottom. It also eliminates deviations caused by inconsistent sampling amounts in each compartment due to human factors and potential spillage after sampling.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A powder sample quantitative dispensing shovel includes a shell, a linkage assembly with a gripping part, a fixed shaft, a first curved arm, a second curved arm, a baffle, and a bucket. The fixed shaft is vertically fixed to the inner surface of the shell. The linkage assembly is disposed inside the shell and moves up and down under the action of hand force. The upper end of the first curved arm is hinged to the linkage assembly. A first through hole is provided near the upper end of the first curved arm. The baffle is fixed to the lower end of the first curved arm. The upper end of the second curved arm is hinged to the linkage assembly. A second through hole is provided near the upper end of the second curved arm. The bucket is fixed to the lower end of the second curved arm. The fixed shaft passes through the first through hole and the second through hole. The opening of the bucket faces the baffle.

[0008] More preferably, the linkage assembly includes a movable block, a first link, and a second link. The upper part of the movable block is a gripping part, and the lower bottom of the movable block is hinged to the upper ends of the first link and the second link. The lower end of the first link is hinged to the upper end of the first crank arm, and the lower end of the second link is hinged to the upper end of the second crank arm.

[0009] More preferably, the linkage assembly further includes a crossbar, which is fixed to the lower bottom of the movable block, and the upper ends of the first link and the second link are both hinged to the crossbar.

[0010] More preferably, the gripping part is provided with a first opening, and a gripping block is provided in the first opening. The gripping block is fixedly connected to the inner upper edge of the first opening. The upper part of the outer shell is provided with a second opening, and the first opening and the second opening are correspondingly arranged.

[0011] More preferably, the quantitative sample shovel further includes a reset assembly, which includes a fixed post and an elastic telescopic member. The fixed post is vertically fixed to the inner surface of the outer shell, one end of the elastic telescopic member is fixedly connected to the fixed post, and the other end is connected to the movable block. The fixed post is located below the movable block.

[0012] More preferably, the movable block is provided with a third through hole, and the other end of the elastic telescopic member is fixedly connected to a positioning post, which is inserted into the third through hole.

[0013] More preferably, the elastic expansion joint is a spring.

[0014] More preferably, the outer sides of the housing are provided with a fourth through hole and a fifth through hole, the upper part of the first curved arm is located inside the housing, the lower part of the first curved arm passes through the fourth through hole, the upper part of the second curved arm is located inside the housing, and the lower part of the second curved arm passes through the fifth through hole.

[0015] More preferably, the first articulated boom is composed of a first straight boom section and a first articulated boom section connected to each other. The first straight boom section has a first through hole in its middle. The end of the first straight boom section is hinged to the linkage assembly. The end of the first articulated boom section is fixed to the baffle. The second articulated boom is composed of a second straight boom section and a second articulated boom section connected to each other. The second straight boom section has a second through hole in its middle. The end of the second straight boom section is hinged to the linkage assembly. The end of the second articulated boom section is fixed to the bucket.

[0016] This utility model has the following beneficial effects:

[0017] 1. Improve sampling accuracy and representativeness:

[0018] Quantitative control: The bucket adopts a fixed size design to ensure consistent sampling volume each time, avoiding sampling volume fluctuations caused by human operation in traditional methods.

[0019] Full-layer sampling: The bucket and baffle are linked, allowing the bucket and baffle to be inserted into the bottom of the sample simultaneously and completely intercepted, preventing the bottom material from being missed and ensuring that the sample covers the entire thickness layer, thus improving representativeness.

[0020] 2. Reduce human error.

[0021] Standardized operation: The bucket and the baffle move synchronously through the mechanical linkage of the moving block, the linkage component, the first articulated arm and the second articulated arm. The operator only needs to tighten / release the gripping block to complete the sampling, reducing the deviation caused by the technique (such as tilting the insertion or not digging to the bottom).

[0022] Spill-proof design: Keeping the gripper blocks firmly in place ensures the bucket closes, preventing sample spillage during lifting and ensuring sample integrity.

[0023] 3. Improve work efficiency

[0024] Rapid positioning and sampling: The coordinated operation of the baffle and bucket simplifies the steps of manually aligning the baffle in traditional methods, shortens the sampling time per operation, and is especially suitable for large-scale operations.

[0025] Good repeatability: The fixed opening range and bucket size design ensure that the results of multiple samplings by different operators or the same person are highly consistent, reducing the re-inspection rate. Attached Figure Description

[0026] Figure 1 This is a front view of the sample shovel of this utility model;

[0027] Figure 2 This is a rear view of the sample shovel of this utility model;

[0028] Figure 3The rear view of the sample shovel of this utility model without its outer shell;

[0029] Figure 4 This is a rear view of the sample shovel of this utility model after removing the outer shell.

[0030] Explanation of reference numerals in the attached figures:

[0031] 10. Outer shell; 11. Second opening; 12. Fourth through hole; 13. Fifth through hole; 20. Linkage assembly; 21. Movable block; 211. First opening; 212. Grip block; 213. Third through hole; 22. Crossbar; 23. First connecting rod; 24. Second connecting rod; 30. Fixed shaft; 40. First crank arm; 41. First through hole; 42. First straight arm section; 43. First crank arm section; 50. Second crank arm; 51. Second through hole; 52. Second straight arm section; 53. Second crank arm section; 60. Baffle; 70. Bucket; 80. Reset assembly; 81. Fixed post; 82. Elastic telescopic component; 83. Positioning post. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0033] See Figures 1 to 4A powder sample quantitative dispensing shovel includes a housing 10, a linkage assembly 20 with a gripping part, a fixed shaft 30, a first curved arm 40, a second curved arm 50, a baffle 60, and a bucket 70. The fixed shaft 30 is vertically fixed to the inner surface of the housing 10. The linkage assembly 20 is disposed inside the housing 10 and moves up and down under the action of hand force. The upper end of the first curved arm 40 is hinged to the linkage assembly 20, and a first through hole 41 is provided near the upper end of the first curved arm 40. The baffle 60 is fixed to the lower end of the first curved arm 40. The upper end of the second curved arm 50 is hinged to the linkage assembly 20, and a second through hole 51 is provided near the upper end of the second curved arm 50. The bucket 70 is fixed to the lower end of the second curved arm 50. The fixed shaft 30 passes through the first through hole 41 and the second through hole 51, and the opening of the bucket 70 faces the baffle 60. Before use, keep the bucket 70 and baffle 60 open. Then, hold the gripper of the linkage assembly 20 with your hand. Using the positional difference between the upper edge of the outer shell 10 and the gripper, exert upward force to move the linkage assembly 20 upward. Transmit the force to the first crank arm 40 and the second crank arm 50, causing both the first crank arm 40 and the second crank arm 50 to rotate around the fixed axis 30. When the upper ends of the first crank arm 40 and the second crank arm 50 rotate upward, the baffle 60 connected to the lower end of the first crank arm 40 and the bucket 70 connected to the lower end of the second crank arm 50 will gradually close. The bucket 70 is responsible for scooping up and collecting the sample in the opening area, cooperating with the baffle 60. The baffle 60 is responsible for gathering the sample in the area, cooperating with the bucket 70, thereby scooping up the sample.

[0034] Please refer to the key points. Figure 2 and Figure 3 Preferably, the linkage assembly 20 includes a movable block 21, a crossbar 22, a first connecting rod 23, and a second connecting rod 24. The upper part of the movable block 21 is a gripping part, and the lower bottom of the movable block 21 is horizontally fixed to the crossbar 22. The upper ends of the first connecting rod 23 and the second connecting rod 24 are both hinged to the crossbar 22. Alternatively, the crossbar 22 can be omitted, and the upper ends of the first connecting rod 23 and the second connecting rod 24 can be directly hinged to the movable block 21. The lower end of the first connecting rod 23 is hinged to the upper end of the first crank arm 40, and the lower end of the second connecting rod 24 is hinged to the upper end of the second crank arm 50. The upward force transmitted through the first connecting rod 23 and the second connecting rod 24 causes the upper ends of both the first crank arm 40 and the second crank arm 50 to rotate upwards around the fixed axis 30.

[0035] The gripping part has a first opening 211, and a gripping block 212 is disposed inside the first opening 211. The gripping block 212 is fixedly connected to the inner upper edge of the first opening 211. The upper part of the outer shell 10 has a second opening 11, and the first opening 211 and the second opening 11 are correspondingly arranged. Therefore, fingers can pass through the first opening 211 and the second opening 11 at the same time, so that the gripping block 212 and the upper edge of the outer shell 10 are simultaneously located in the palm. When the fist is clenched, the gripping block 212 moves upward, thereby driving the movable block 21, the first connecting rod 23, and the second connecting rod 24 to move upward simultaneously.

[0036] Please see Figures 2 to 4 To ensure that the bucket 70 and baffle 60 automatically remain open when not in use, a reset component 80 is added to the above-described embodiment. The reset component 80 includes a fixing post 81 and a spring-loaded telescopic member 82. The fixing post 81 is vertically fixed to the inner surface of the outer casing 10. One end of the spring-loaded telescopic member 82 is fixedly connected to the fixing post 81, and the other end is connected to the movable block 21. The fixing post 81 is located below the movable block 21. Preferably, the movable block 21 has a third through hole 213. The other end of the spring-loaded telescopic member 82 is fixedly connected to a positioning post 83, which is inserted into the third through hole 213. In this embodiment, the third through hole 213 is elongated to facilitate the installation of the positioning post 83, preventing the positioning post 83 from sliding up and down within the third through hole 213. The spring-loaded telescopic member 82 is preferably a spring. When the elastic telescopic component 82 is in the reset state, the baffle 60 and bucket 70 return to the open state. When the gripper is tightened, the elastic telescopic component 82 is stretched as the movable block 21 moves upward. When the sample needs to be released after scooping it up, the gripper block 212 is released, and the elastic telescopic component 82, under the action of the restoring force, drives the movable block 21 downward, and the bucket 70 and the baffle automatically separate. The reset component 80 makes operation more convenient.

[0037] Please see Figure 4 To position the bucket 70 and baffle 60 outside the housing 10, a fourth through hole 12 and a fifth through hole 13 are provided on both sides of the outer surface of the housing 10. The upper part of the first curved arm 40 is located inside the housing 10, and the lower part of the first curved arm 40 passes through the fourth through hole 12. The upper part of the second curved arm 50 is located inside the housing 10, and the lower part of the second curved arm 50 passes through the fifth through hole 13. When scooping samples, the bucket 70 and baffle can open and close flexibly without interference from the housing 10.

[0038] Preferably, the first articulated boom 40 is composed of a first straight boom section 42 and a first articulated boom section 43 connected to each other. The first straight boom section 42 has a first through hole 41 in the middle, and the end of the first straight boom section 42 is hinged to the linkage assembly 20. The end of the first articulated boom section 43 is fixed to the baffle 60. The second articulated boom 50 is composed of a second straight boom section 52 and a second articulated boom section 53 connected to each other. The second straight boom section 52 has a second through hole 51 in the middle, and the end of the second straight boom section 52 is hinged to the linkage assembly 20. The end of the second articulated boom section 53 is fixed to the bucket 70. By setting the first straight boom section 42 and the second straight boom section 52, the first connecting rod 23 and the second connecting rod 24 can move upward by a shorter distance to drive the baffle 60 at the end of the first articulated boom 40 and the bucket 70 at the end of the second articulated boom 50 to produce a larger rotation angle, making the structure of the entire device more compact.

[0039] The working principle of this utility model is as follows:

[0040] 1. Preparation stage:

[0041] The ground powder sample is evenly spread on a smooth plate with a thickness of ≤5mm and divided into a uniform grid of ≥4×5.

[0042] Check whether the bucket 70 of the powder sample quantitative sampling shovel is aligned with the baffle 60, and ensure that the elastic telescopic component 82 is reset normally and the bucket 70 is in the open state.

[0043] 2. Sampling stage:

[0044] Positioning: Hold the gripper 212 and align the bucket 70 vertically with the random sampling point of the target grid, with the baffle 60 close to one side of the grid.

[0045] Press down: Grip the gripping block 212 tightly, and transmit the force through the linkage component 20, so that the first curved arm 40 drives the baffle 60, and the second curved arm 50 drives the bucket 70 to insert into the bottom of the sample simultaneously.

[0046] Scooping: Keep the bucket 70 horizontal and push it forward until its open end is completely closed with the baffle 60, ensuring that all samples (including the bottom) within the area of ​​the bucket 70 are intercepted.

[0047] Sample lifting: Slowly lift the quantitative sample shovel, keeping the handle firmly in place to prevent the sample from spilling.

[0048] 3. Transfer Phase:

[0049] Release the gripping block 212, and the elastic telescopic component 82 will reset, causing the bucket 70 and the baffle 60 to open. The sample will automatically fall into the receiving container, completing a single quantitative sampling.

[0050] Repeat the above steps to collect samples from all grid cells in sequence, ensuring that the sample size is consistent for each cell.

[0051] This utility model provides a quantitative sample dispensing spatula for powdered samples, which has the following advantages:

[0052] 1. Improve sampling accuracy and representativeness

[0053] Quantitative control: The bucket 70 adopts a fixed size design to ensure that the sampling amount is consistent each time, avoiding the sampling amount fluctuation caused by human operation in traditional methods, and ensuring that the sampling amount of each compartment is approximately equal.

[0054] Full-layer sampling: The bucket 70 and baffle 60 are linked, allowing the bucket 70 and baffle 60 to be inserted into the bottom of the sample at the same time and completely intercepted, preventing the bottom material (such as coarse particles or high-density components) from being missed, ensuring that the sample covers the entire thickness layer and improving representativeness.

[0055] 2. Reduce human error.

[0056] Standardized operation: The bucket 70 and the baffle 60 are synchronized through a mechanically linked structure (including movable block 21, linkage component 20, first curved arm 40 and second curved arm 50). The operator only needs to grip / release the grip block 212 to complete the sampling, reducing the deviation caused by manual problems (such as tilting insertion or not scooping to the bottom).

[0057] Spill prevention design: Keeping the gripping block 212 firmly in place ensures that the bucket 70 is closed, preventing the sample from spilling during the lifting process and ensuring the integrity of the sample.

[0058] 3. Improve work efficiency

[0059] Rapid positioning and sampling: The coordinated operation of the baffle 60 and the bucket 70 simplifies the steps of manually aligning the baffle 60 in the traditional method, shortens the sampling time per operation, and is especially suitable for large-scale operations.

[0060] Good repeatability: The fixed opening range and 70mm bucket size design ensure that the results of multiple samplings by different operators or the same person are highly consistent, reducing the re-inspection rate.

[0061] The above description is only a specific embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made based on the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A quantitative sampling spatula for powdered samples, characterized in that: The device includes a housing, a linkage assembly with a gripping part, a fixed shaft, a first crank arm, a second crank arm, a baffle, and a bucket. The fixed shaft is vertically fixed to the inner surface of the housing. The linkage assembly is disposed inside the housing and moves up and down under the action of hand force. The upper end of the first crank arm is hinged to the linkage assembly. A first through hole is provided near the upper end of the first crank arm. The baffle is fixed to the lower end of the first crank arm. The upper end of the second crank arm is hinged to the linkage assembly. A second through hole is provided near the upper end of the second crank arm. The bucket is fixed to the lower end of the second crank arm. The fixed shaft passes through the first through hole and the second through hole. The bucket opening faces the baffle.

2. The powder sample quantitative dispensing spatula according to claim 1, characterized in that: The linkage assembly includes a movable block, a first link, and a second link. The upper part of the movable block is a gripping part, and the lower bottom of the movable block is hinged to the upper ends of the first link and the second link. The lower end of the first link is hinged to the upper end of the first crank arm, and the lower end of the second link is hinged to the upper end of the second crank arm.

3. The powder sample quantitative dispensing spatula according to claim 1, characterized in that: The linkage assembly also includes a crossbar, which is fixed to the lower bottom of the movable block, and the upper ends of the first link and the second link are both hinged to the crossbar.

4. The powder sample quantitative dispensing spatula according to claim 2, characterized in that: The gripping part is provided with a first opening, and a gripping block is provided in the first opening. The gripping block is fixedly connected to the inner upper edge of the first opening. The upper part of the outer shell is provided with a second opening, and the first opening and the second opening are correspondingly arranged.

5. The powder sample quantitative dispensing spatula according to claim 2, characterized in that: It also includes a reset assembly, which includes a fixed post and an elastic telescopic member. The fixed post is vertically fixed to the inner surface of the housing. One end of the elastic telescopic member is fixedly connected to the fixed post, and the other end is connected to the movable block. The fixed post is located below the movable block.

6. The powder sample quantitative dispensing spatula according to claim 5, characterized in that: The movable block is provided with a third through hole, and the other end of the elastic telescopic member is fixedly connected to a positioning post, which is inserted into the third through hole.

7. The powder sample quantitative dispensing spatula according to claim 5, characterized in that: The elastic expansion joint is a spring.

8. The powder sample quantitative dispensing spatula according to claim 1, characterized in that: The outer side of the housing is provided with a fourth through hole and a fifth through hole. The upper part of the first curved arm is located inside the housing, and the lower part of the first curved arm passes through the fourth through hole. The upper part of the second curved arm is located inside the housing, and the lower part of the second curved arm passes through the fifth through hole.

9. The powder sample quantitative dispensing spatula according to claim 1, characterized in that: The first articulated boom is composed of a first straight boom section and a first articulated boom section connected to each other. The first straight boom section has a first through hole in the middle. The end of the first straight boom section is hinged to the linkage assembly. The end of the first articulated boom section is fixed to the baffle. The second articulated boom is composed of a second straight boom section and a second articulated boom section connected to each other. The second straight boom section has a second through hole in the middle. The end of the second straight boom section is hinged to the linkage assembly. The end of the second articulated boom section is fixed to the bucket.

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