An automatic needle-shaped sampling structure applied to powdery materials
By designing an automatic needle-like sampling structure, utilizing multi-layer sampling ports and a rotational damping mechanism, the problem of cumbersome operation caused by the layering of powder materials was solved, achieving efficient multi-layer powder sampling and testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN DONGJIAN TECH CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-07-24
AI Technical Summary
Existing technologies make sampling powdery materials cumbersome, time-consuming, and labor-intensive due to particle stratification, especially when sampling at different stratification depths, requiring multiple samplings.
An automatic needle-shaped sampling structure was designed, including a mounting plate, sleeve, inner cylinder, outer cylinder and spiral extrusion rod. Through the design of multiple sampling ports and material inlets, combined with a rotary damping mechanism and a drive motor, it can realize the simultaneous sampling and discharging of multi-layer powdered materials.
It simplifies the sampling and placement process, reduces the workload of staff, saves time, and enables efficient sampling and testing of multi-layered powdery materials.
Smart Images
Figure CN224552770U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of powder sampling technology, specifically to an automatic needle-shaped sampling structure applied to powdered materials. Background Technology
[0002] In many industrial or food production processes, powdered materials are often involved and need to be sampled and tested. Since powdered materials can separate into layers due to differences in particle density, multi-point sampling is usually required during sampling.
[0003] Currently, the existing technical operation method usually involves inserting the rod into the powder material and opening the sampling groove on the surface of the sampling rod at the target depth, allowing the material at the target depth to enter the sampling groove, thereby completing a single sampling. However, when sampling powder at layered depths, multiple samplings are required, which is cumbersome, time-consuming, and labor-intensive. Utility Model Content
[0004] The purpose of this invention is to provide an automatic needle-shaped sampling structure for powdered materials, so as to overcome the shortcomings of the prior art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic needle-shaped sampling structure for powdered materials, comprising a mounting plate, a sleeve fixed on the mounting plate, an inner cylinder coaxially fixedly connected to the bottom of the sleeve, an outer cylinder coaxially rotatably connected to the sleeve, a spiral extrusion rod coaxially rotatably connected inside the inner cylinder, a first sampling port, a second sampling port and a third sampling port equally spaced from top to bottom on the inner cylinder, and a first material outlet, a second material outlet and a third material outlet corresponding one-to-one with the first sampling port, the second sampling port and the third sampling port on the outer cylinder.
[0006] Preferably, the first sampling port, the second sampling port, and the third sampling port are fan-shaped, the arc corresponding to the fan shape of the first sampling port and the second sampling port is the same, and the arc corresponding to the fan shape of the third sampling port is greater than the arc corresponding to the fan shape of the first sampling port and the second sampling port.
[0007] Preferably, an insertion needle is fixedly connected to the bottom of the outer cylinder.
[0008] Preferably, the inner wall of the outer cylinder is fitted to the outer wall of the inner cylinder, and both the inner wall of the outer cylinder and the outer wall of the inner cylinder are smooth surfaces.
[0009] Preferably, a drive motor is fixedly connected to the mounting plate, and the output shaft of the drive motor is coaxially and fixedly connected to the screw extruder.
[0010] Preferably, the spiral extrusion rod divides the inner cavity of the inner cylinder into a spiral channel, and the first sampling port, the second sampling port and the third sampling port are all connected to the spiral channel.
[0011] Preferably, a rotary damping mechanism is provided between the outer cylinder and the sleeve. The rotary damping mechanism includes an annular groove formed on the sleeve. A first damping hole, a second damping hole, and a third damping hole are sequentially formed on the annular groove. A damping head located in the annular groove is radially elastically slidably connected to the sleeve. During the rotation of the outer cylinder relative to the sleeve, the damping head slides along the annular groove so that the damping head alternately engages with the first damping hole, the second damping hole, and the third damping hole.
[0012] Preferably, an annular sleeve is coaxially fixedly connected to the outer cylinder, and a storage cavity is provided on the annular sleeve. A first spring is provided in the storage cavity, one end of the first spring is fixedly connected to a damping head, and the other end is fixedly connected to the inner wall of the storage cavity.
[0013] Preferably, the damping head is arranged in a hemispherical shape, and the depths of the first damping hole, the second damping hole, and the third damping hole are all smaller than the radius of the hemispherical damping head.
[0014] In the above technical solution, this utility model provides an automatic needle-shaped sampling structure for powdery materials. During sampling, the outer cylinder is first rotated to align the first, second, and third feed inlets with their corresponding first, second, and third sampling ports. Then, the drive motor is activated, and its output shaft drives the spiral extruder to rotate. This allows the powdery material at the corresponding depths of the first, second, and third feed inlets to enter the spiral cavity through the first, second, and third sampling ports, respectively. The spiral extruder continues to rotate, drawing in a certain amount of powdery sample. This process can extract powdery material from multiple deep layers without requiring repeated sampling. The entire operation is simple and straightforward, reducing the workload of workers and saving time to a certain extent.
[0015] When sampling is required, the outer cylinder is first driven to rotate until the damping head is inserted into the second damping hole. At this time, the first and second sampling ports are closed, while the third sampling port remains open. Then, the screw extruder is driven to reverse so that the powdered sample flows out from the third sampling port. The entire process facilitates the removal and testing of the sample by the staff, and is simple, convenient, time-saving, and labor-saving. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.
[0017] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model; Figure 2 This is a schematic diagram of the spiral extruder structure provided in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the inner cylinder provided in an embodiment of the present utility model; Figure 4 A partial structural schematic diagram of the inner cylinder provided in an embodiment of this utility model; Figure 5 This is a schematic diagram of the outer cylinder provided in an embodiment of the present utility model; Figure 6 This is a partial structural diagram of the outer cylinder provided in an embodiment of the present utility model.
[0018] Explanation of reference numerals in the attached figures: 1. Mounting plate; 2. Sleeve; 3. Inner cylinder; 4. Outer cylinder; 5. Spiral extrusion rod; 6. First sampling port; 7. Second sampling port; 8. Third sampling port; 9. First feed port; 10. Second feed port; 11. Third feed port; 12. Insertion needle; 13. Drive motor; 14. Annular groove; 15. First damping hole; 16. Second damping hole; 17. Third damping hole; 18. Damping head; 19. Annular sleeve; 20. First spring. Detailed Implementation
[0019] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.
[0020] Please see Figure 1-6 This utility model provides an automatic needle-shaped sampling structure for powdered materials, including a mounting plate 1, a sleeve 2 fixed on the mounting plate 1, an inner cylinder 3 coaxially fixedly connected to the bottom of the sleeve 2, an outer cylinder 4 coaxially rotatably connected to the sleeve 2, a spiral extrusion rod 5 coaxially rotatably connected inside the inner cylinder 3, and a first sampling port 6, a second sampling port 7, and a third sampling port 8 equidistantly opened from top to bottom in the inner cylinder 3. The outer cylinder 4 has a first feed port 9, a second feed port 10, and a third feed port 11 corresponding to the first sampling port 6, the second sampling port 7, and the third sampling port 8.
[0021] It should be noted that the first sampling port 6, the second sampling port 7, and the third sampling port 8 are fan-shaped. The arc corresponding to the fan shape of the first sampling port 6 and the second sampling port 7 is the same, while the arc corresponding to the fan shape of the third sampling port 8 is greater than that of the first sampling port 6 and the second sampling port 7. Furthermore, one side of the first sampling port 6, the second sampling port 7, and the third sampling port 8 are aligned from top to bottom. Based on this, since the arc corresponding to the fan shape of the third sampling port 8 is greater than that of the first sampling port 6 and the second sampling port 7, when the outer cylinder 4 is rotated, the outer cylinder 4 can block the first sampling port 6 and the second sampling port 7, while the third sampling port 8 remains open. This allows the screw extruder 5 to rotate, enabling the powder in the inner cylinder 3 to be discharged, thus facilitating material collection. The edges of the first sampling port 6, the second sampling port 7, and the third sampling port 8 are all beveled to prevent the adhesion of powdery materials.
[0022] The bottom of the outer cylinder 4 is fixedly connected to an insertion needle 12, which facilitates immersion of the entire cylinder in the powder for sampling.
[0023] The inner wall of the outer cylinder 4 is fitted to the outer wall of the inner cylinder 3, and both the inner wall of the outer cylinder 4 and the outer wall of the inner cylinder 3 are smooth surfaces. It should be further noted that the inner wall of the inner cylinder 3 is also smooth. This prevents powder from adhering to the outer wall, which would not only affect subsequent sampling and testing, but also prevent powder from affecting the rotation of the inner cylinder 3 and the outer cylinder 4.
[0024] Among them, a drive motor 13 is fixedly connected to the mounting plate 1, and the output shaft of the drive motor 13 is fixedly connected to the spiral extrusion rod 5 coaxially.
[0025] The spiral extrusion rod 5 divides the inner cavity of the inner cylinder 3 into a spiral channel, and the first sampling port 6, the second sampling port 7, and the third sampling port 8 are all connected to the spiral channel. When the spiral extrusion rod 5 rotates, the powdered material slides along the spiral channel so that the powdered material can complete the sampling and unloading processes.
[0026] A rotary damping mechanism is provided between the outer cylinder 4 and the sleeve 2. The rotary damping mechanism includes an annular groove 14 opened on the sleeve 2. A first damping hole 15, a second damping hole 16 and a third damping hole 17 are sequentially opened on the annular groove 14. A damping head 18 located in the annular groove 14 is radially elastically slidably connected to the sleeve 2. During the rotation of the outer cylinder 4 relative to the sleeve 2, the damping head 18 slides along the annular groove 14 so that the damping head 18 alternately engages with the first damping hole 15, the second damping hole 16 and the third damping hole 17.
[0027] Among them, an annular sleeve 19 is coaxially fixedly connected to the outer cylinder 4. The annular sleeve 19 has a storage cavity. A first spring 20 is provided in the storage cavity. One end of the first spring 20 is fixedly connected to the damping head 18, and the other end is fixedly connected to the inner wall of the storage cavity.
[0028] The damping head 18 is arranged in a hemispherical shape, and the depths of the first damping hole 15, the second damping hole 16, and the third damping hole 17 are all smaller than the radius of the hemispherical damping head 18. Therefore, when the damping head 18 is inserted into the first damping hole 15, the second damping hole 16, or the third damping hole 17, only a large portion of the damping head 18 is fitted, allowing the user to easily rotate the outer cylinder 4. The rotational damping mechanism is designed to prevent rotation between the outer cylinder 4 and the sleeve 2 within a certain range; only external forces exceeding this range can drive the outer cylinder 4 to rotate relative to the sleeve 2.
[0029] Specifically, when the damping head 18 is located in the first damping hole 15, it indicates that the first material port 9, the second material port 10, and the third material port 11 are aligned with the corresponding first sampling port 6, the second sampling port 7, and the third sampling port 8, thus facilitating material collection. When the damping head 18 is located in the second damping hole 16, the first sampling port 6 and the second sampling port 7 are blocked by the outer cylinder 4, while the third sampling port 8 is partially blocked, but it still has the function of sampling or releasing. When the damping head 18 is located in the third damping hole 17, the first sampling port 6, the second sampling port 7, and the third sampling port 8 are all blocked by the outer cylinder 4 and are in a closed state, which makes it convenient to store after use and prevents dust from entering the inner cavity of the inner cylinder 3.
[0030] In the specific workflow, when the operator rotates the annular sleeve 19, the damping head 18 slides along the annular groove until it aligns with the first damping hole 15. At this time, the first spring 20 restores its elastic deformation so that the damping head 18 can be inserted into the first damping hole 15. When it is necessary to rotate to the second damping hole 16, only the external force used for rotation needs to be increased. With the cooperation of the first damping hole 15 and the damping head 18, the damping head 18 directly compresses the first spring 20 until the damping head 18 retracts into the annular groove. Then, when the damping head 18 is inserted into the second damping hole 16 or the third damping hole 17 respectively, it can be inserted into the second damping hole 16 or the third damping hole 17 under the action of the first spring 20.
[0031] It should be further noted that a functional handle is fixedly installed on the mounting plate 1 so that the staff can hold the entire device to complete the sampling and placement procedures.
[0032] During sampling, the outer cylinder 4 is first rotated to align the first feed port 9, the second feed port 10, and the third feed port 11 with the corresponding first sampling port 6, the second sampling port 7, and the third sampling port 8. Then, the drive motor 13 is activated, and its output shaft drives the screw extruder 5 to rotate. This allows the powdery material from the depths of the first feed port 9, the second feed port 10, and the third feed port 11 to enter the spiral cavity through the first sampling port 6, the second sampling port 7, and the third sampling port 8, respectively. The screw extruder 5 continues to rotate, drawing up a certain amount of powdery sample. This process can extract powdery material from multiple deep layers without requiring repeated sampling. The entire operation is simple and straightforward, reducing the workload of workers and saving time.
[0033] When sampling is required, the outer cylinder 4 is first driven to rotate until the damping head 18 is inserted into the second damping hole 16. At this time, the first sampling port 6 and the second sampling port 7 are in a closed state, while the third sampling port 8 is still open. Then, the screw extruder 5 is driven to reverse so that the powdered sample flows out from the third sampling port 8. The whole process makes it easy for staff to take out and test the sample, and the process is simple, convenient, time-saving, and labor-saving.
[0034] It should be further noted that the output shaft of the drive motor 13 is equipped with an angle sensor, which is existing technology and can be purchased on the market. The angle sensor can identify the number of rotations of the spiral extrusion rod 5 driven by the output shaft. Preferably, the number of rotations of the spiral extrusion rod 5 driven by the output shaft in reverse during sampling is at least three times the number of rotations of the spiral extrusion rod 5 driven by the output shaft in forward rotation during sampling, so as to remove the powder sample in the spiral channel.
[0035] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.
Claims
1. An automatic needle-shaped sampling structure for powdered materials, comprising a mounting plate, characterized in that, A sleeve is fixed on the mounting plate. An inner cylinder is coaxially fixedly connected to the bottom of the sleeve. An outer cylinder is coaxially rotatably connected to the sleeve. A spiral extrusion rod is coaxially rotatably connected inside the inner cylinder. The inner cylinder has a first sampling port, a second sampling port, and a third sampling port equidistantly opened from top to bottom. The outer cylinder has a first material outlet, a second material outlet, and a third material outlet that correspond one-to-one with the first sampling port, the second sampling port, and the third sampling port.
2. The automatic needle-shaped sampling structure for powdered materials according to claim 1, characterized in that, The first, second, and third sampling ports are fan-shaped. The arc corresponding to the fan shape of the first and second sampling ports is the same, while the arc corresponding to the fan shape of the third sampling port is greater than the arc corresponding to the fan shape of the first and second sampling ports.
3. The automatic needle-shaped sampling structure for powdered materials according to claim 1, characterized in that, The bottom of the outer cylinder is fixedly connected to an insertion needle.
4. The automatic needle-shaped sampling structure for powdered materials according to claim 1, characterized in that, The inner wall of the outer cylinder is fitted to the outer wall of the inner cylinder, and both the inner wall of the outer cylinder and the outer wall of the inner cylinder are smooth surfaces.
5. The automatic needle-shaped sampling structure for powdered materials according to claim 1, characterized in that, A drive motor is fixedly connected to the mounting plate, and the output shaft of the drive motor is coaxially and fixedly connected to the screw extruder.
6. The automatic needle-shaped sampling structure for powdered materials according to claim 1, characterized in that, The spiral extrusion rod divides the inner cavity of the inner cylinder into a spiral channel, and the first sampling port, the second sampling port and the third sampling port are all connected to the spiral channel.
7. The automatic needle-shaped sampling structure for powdered materials according to claim 1, characterized in that, A rotary damping mechanism is provided between the outer cylinder and the sleeve. The rotary damping mechanism includes an annular groove formed on the sleeve. A first damping hole, a second damping hole, and a third damping hole are sequentially formed on the annular groove. A damping head located in the annular groove is radially elastically slidably connected to the sleeve. During the rotation of the outer cylinder relative to the sleeve, the damping head slides along the annular groove so that the damping head alternately engages with the first damping hole, the second damping hole, and the third damping hole.
8. An automatic needle-shaped sampling structure for powdered materials according to claim 7, characterized in that, An annular sleeve is coaxially fixedly connected to the outer cylinder. A storage cavity is provided on the annular sleeve. A first spring is provided inside the storage cavity. One end of the first spring is fixedly connected to a damping head, and the other end is fixedly connected to the inner wall of the storage cavity.
9. An automatic needle-shaped sampling structure for powdered materials according to claim 7, characterized in that, The damping head is arranged in a hemispherical shape, and the depth of the first damping hole, the second damping hole, and the third damping hole is smaller than the radius of the hemispherical damping head.