Powder fine sampling device

Abstract

The utility model provides a fine powder sampling device which comprises a tank body, a bottom cover, a screw rod, a slip ring and a blade, the bottom cover is arranged at the lower end of the tank body, the bottom cover is connected with the tank body, the bottom cover and the tank body define a containing space, a check ring is arranged on the inner side of the tank body, the screw rod penetrates through the bottom cover, and the slip ring is arranged on the lower end of the tank body. The sliding ring is arranged on the screw rod in a sleeving mode, the sliding ring is connected with the bottom cover, the screw rod can rotate relative to the sliding ring, threads are arranged on the portion, located in the containing space, of the screw rod, the upper section of the threads is matched with the check ring, the blade is arranged on the inner side of the bottom cover, and the lower section of the threads is matched with the check ring. The blades are connected in the circumferential direction of the screw rod, and a through hole is formed in the screw rod in the axial direction. According to the utility model, the powder sampling precision and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to experimental equipment technical field, specifically, relate to a fine sampling device of powder. BACKGROUND

[0002] The precision of laboratory powder weighing directly influences the accuracy of experimental results, therefore, very high precision requirement is put forward to powder weighing technology. The traditional manual weighing mode not only has the problem of inaccurate weighing, but also affects work efficiency due to the slow speed of manual operation. At the same time, the powder sampling and sampling by hand directly exist the risk of powder escaping, which affects human health.

[0003] Therefore, the utility model provides a fine sampling device of powder to improve the precision of powder weighing, improve work efficiency and reduce the influence on the health of operators. UTILITY MODEL CONTENT

[0004] In view of the defects in the prior art, the utility model aims at providing a fine sampling device of powder capable of improving sampling efficiency and precision.

[0005] The fine sampling device of powder provided by the utility model comprises a tank body, a bottom cover, a screw rod, a sliding ring, and a blade. The bottom cover is arranged at the lower end of the tank body, and the bottom cover is connected with the tank body. The bottom cover and the tank body enclose a containing space. The inner side of the tank body is provided with a retaining ring. The screw rod penetrates through the bottom cover. The sliding ring is sleeved on the screw rod. The sliding ring is connected with the bottom cover. The screw rod can rotate relative to the sliding ring. The part of the screw rod located in the containing space is provided with a thread. The upper section of the thread is matched with the retaining ring. The blade is arranged on the inner side of the bottom cover. The blade is connected in the circumferential direction of the screw rod. The inside of the screw rod is provided with a through hole in the axial direction.

[0006] Preferably, the utility model further comprises an upper cover, which is arranged at the upper end of the tank body and connected with the tank body.

[0007] Preferably, the tank body, the bottom cover and the upper cover are made of stainless steel.

[0008] Preferably, the utility model further comprises a knob, which is sleeved on the screw rod and arranged on the outer side of the bottom cover.

[0009] Further, the screw rod and the sliding ring, and the sliding ring and the bottom cover are sealed.

[0010] Preferably, the screw rod is provided with a shaft shoulder, which is lapped on the sliding ring.

[0011] Preferably, the middle portion of the retaining ring has an inverted U-shaped cavity, and the upper section of the thread is disposed within the inverted U-shaped cavity.

[0012] Furthermore, there is a gap between the top of the helical rod and the inverted U-shaped cavity.

[0013] Preferably, the upper circumferential section of the thread fits into the inverted U-shaped cavity.

[0014] Preferably, the inner side of the top of the helical rod has a bevel.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The powder fine sampling device provided by this utility model improves the accuracy and efficiency of powder sampling by controlling the rotation speed of the screw rod; it achieves isolation between personnel and powder, avoiding contact with hazardous substances; the tank body is made of special material, which can support powders with various properties, thus improving versatility. Attached Figure Description

[0017] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the internal structure of the powder fine sampling device according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the bottom structure of the powder fine sampling device according to an embodiment of the present invention.

[0020] Among them, 1-can body, 2-bottom cover, 3-spiral rod, 4-slip ring, 5-blade, 6-retaining ring, 7-top cover, 8-knob, 9-powder discharge port. Detailed Implementation

[0021] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0022] This invention provides a fine powder sampling device that replaces manual sampling, enabling the direct addition of hazardous samples to the target container, avoiding leakage caused by manual sample handling, while improving the accuracy and efficiency of sample addition, and adapting to different working environments and material characteristics.

[0023] like Figure 1 andFigure 2 As shown, the powder fine sampling device of this embodiment includes at least a canister 1, a bottom cover 2, a spiral rod 3, a slip ring 4, and blades 5. The bottom cover 2 is located at the lower part of the canister 1 and is connected to the canister 1. The powder to be added is first added from the upper part of the canister 1 and stored in the containment space enclosed by the canister 1 and the bottom cover 2. The spiral rod 3 passes through the bottom cover 2, with part located on the inner side of the bottom cover 2, i.e., the side connected to the canister 1, and part located on the outer side of the bottom cover 2. The slip ring 4 is sleeved on the spiral rod 3 and is connected to the bottom cover 2 where the spiral rod 3 passes through the bottom cover 2. The slip ring 4 is fixed to the bottom cover 2, while the spiral rod 3 can rotate relative to the slip ring 4. The blades 5 are located on the inner side of the bottom cover 2 and are connected to the circumference of the spiral rod 3. When the spiral rod 3 rotates, the blades 5 rotate together, and the rotation of the blades 5 stirs and disperses the powder at the bottom. The screw rod 3 has threads on the inner side of the bottom cover 2, and a retaining ring 6 is provided on the inner side of the tank body 1. A portion of the threads of the screw rod 3 engages with the retaining ring 6, enabling the upward conveying of powder through the threads. The screw rod 3 has a through hole along the axial direction inside, forming a powder drop outlet 9 at the bottom of the screw rod 3. Thus, when the powder conveyed upward along the threads reaches the top of the screw rod 3, it is blocked by the retaining ring 6 and then enters the through hole of the screw rod 3, falling out of the powder drop outlet 9.

[0024] In this embodiment, the retaining ring 6 has an inverted cavity in the middle, which can be either an inverted U-shape or a cone shape. The threaded portion of the spiral rod 3 is located inside this cavity, with a gap between its top and the bottom of the cavity, and its circumference is as close as possible to the inner wall of the cavity. This prevents the powder from falling off the side when it is conveyed upwards through the thread; when the powder reaches the top, it can gather at the hole of the spiral rod 3 and fall down. To improve the powder falling effect, a bevel is opened on the inner side of the top of the spiral rod 3 along its wall thickness direction, forming a downward slope from the outside to the inside, which facilitates the sliding of the powder.

[0025] The powder fine sampling device of this embodiment also includes a knob 8, which is sleeved on the screw rod 3 and located on the outside of the bottom cover 2. By operating the knob 8, the screw rod 3 can be rotated. When the screw rod 3 rotates in the forward direction, the powder can be conveyed upward. When powder jamming occurs, the powder can be output in the opposite direction by reversing the screw rod 3, thus solving the powder jamming problem. At the same time, the powder sampling efficiency and accuracy of the entire device can be changed by controlling the rotation speed of the screw rod 3 according to the amount of powder to be sampled and the accuracy of powder sampling.

[0026] The powder fine sampling device of this embodiment also includes an upper cover 7, which is located on the top of the tank body 1 and connected to the tank body 1, thereby realizing the encapsulation of the powder fine sampling device and enabling the powder to be completely sealed inside the sampling device.

[0027] In this embodiment, the tank body 1, bottom cover 2, and top cover 7 are all made of stainless steel, specifically 316L material, to achieve the effects of acid and alkali resistance and resistance to various organic solvents.

[0028] The slip ring 4 and the bottom cover 2 are sealed together to prevent powder from leaking out of the sampling device. The screw rod 3 is provided with a shoulder, which rests on the slip ring 4 to improve the sealing effect between the screw rod 3 and the slip ring 4 and reduce powder leakage.

[0029] Blade 5 can be in the shape of a fan blade, as long as it can achieve the stirring effect.

[0030] In use, the powder fine sampling device of this embodiment connects to a knob 8 via an external device. The knob 8 rotates the screw rod 3 and blades 5, causing the powder at the top to fall into the lower part of the bottom cover 2 under gravity. The powder, under the action of the blades 5, enters the bottom of the screw rod 3, rises to the top of the screw rod 3 as the screw rotates, and falls through the through hole to the powder outlet 9. Simultaneously, the rotation speed of the knob 8 can be changed via the external device according to the amount of powder collected and the accuracy of the collection, thereby changing the sampling efficiency and speed of the entire sampling device. If powder jamming occurs in the sampling device, it can be resolved by rotating the knob 8 in both directions.

[0031] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A fine powder sampling device, characterized in that, The device includes a tank body, a bottom cover, a spiral rod, a slip ring, and blades. The bottom cover is located at the lower end of the tank body and is connected to the tank body. The bottom cover and the tank body form an accommodating space. A retaining ring is provided on the inner side of the tank body. The spiral rod passes through the bottom cover. The slip ring is sleeved on the spiral rod and is connected to the bottom cover. The spiral rod can rotate relative to the slip ring. The portion of the spiral rod located in the accommodating space is threaded. The upper section of the threaded portion engages with the retaining ring. The blades are located on the inner side of the bottom cover and are connected to the circumference of the spiral rod. A through hole is formed in the axial direction inside the spiral rod.

2. The powder fine sampling device according to claim 1, characterized in that, It also includes a top cover, which is located at the upper end of the tank and is connected to the tank.

3. The powder fine sampling device according to claim 2, characterized in that, The tank body, bottom cover, and top cover are made of stainless steel.

4. The powder fine sampling device according to claim 1, characterized in that, It also includes a knob, which is sleeved on the screw rod and located on the outside of the bottom cover.

5. The powder fine sampling device according to claim 1, characterized in that, The screw rod and the slip ring are sealed together, as are the slip ring and the bottom cover.

6. The powder fine sampling device according to claim 5, characterized in that, The screw has a shoulder, which rests on the slip ring.

7. The powder fine sampling device according to claim 1, characterized in that, The middle part of the retaining ring has an inverted U-shaped cavity, and the upper section of the thread is located inside the inverted U-shaped cavity.

8. The powder fine sampling device according to claim 7, characterized in that, There is a gap between the top of the helical rod and the inverted U-shaped cavity.

9. The powder fine sampling device according to claim 7, characterized in that, The upper circumferential section of the thread fits into the inverted U-shaped cavity.

10. The powder fine sampling device according to claim 1, characterized in that, The top inner side of the screw rod has a bevel.

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