High-precision automatic weighing device for powder samples

Patent metadata

Field	Value
Publication number	US-12313440-B2
Application number	US-202418959574-A
Country	US
Kind code	B2
Filing date	Nov 25, 2024
Priority date	Jun 28, 2024
Publication date	May 27, 2025
Grant date	May 27, 2025

Abstract

The present disclosure relates to a high-precision automatic weighing device for powder samples, including a three-dimensional moving track and a working area, wherein the three-dimensional moving track includes a horizontal length track, a vertical track and a horizontal width track, the vertical track being slidingly connected to the horizontal length track, the horizontal width track being slidingly connected to the vertical track; the horizontal length track is arranged on one side of the working area, and a cleaning area, a sample storage area and a weighing area are provided in sequence along the horizontal length track within the working area; a series of slideways are connected to a mechanical claw for grabbing a sample tube in the sample storage area, a fine-tuning sample releasing mechanism to release samples in trace amounts, a sample head clamping part for mounting or dismounting of a sample head, and a sample loosening pestle.

First claim

The invention claimed is:

1. A high-precision automatic weighing device for powder samples, comprising a three-dimensional moving track and a working area, wherein the three-dimensional moving track comprises a horizontal length track, a vertical track and a horizontal width track, the vertical track being slidingly connected to the horizontal length track, the horizontal width track being slidingly connected to the vertical track, such that the horizontal width track moves along the vertical track, and the vertical track moves along the horizontal length track;
the horizontal length track is arranged at an edge of one side of the working area, and a cleaning area, a sample storage area and a weighing area are provided in sequence along the horizontal length track within the working area;
a first slideway and a second slideway are provided, wherein the first slideway is above the second slideway on one side, facing the weighing area, of the horizontal width track, and a third slideway and a fourth slideway are provided, wherein the third slideway is above the fourth slideway on the other side of the horizontal width track, the first slideway extending to the other side of the horizontal width track and being located below the fourth slideway, the first slideway, the second slideway, the third slideway and the fourth slideway being all horizontal; and
the first slideway is slidingly connected to a mechanical claw for grabbing a sample tube in the sample storage area, and the second slideway is slidingly connected to a fine-tuning sample releasing mechanism for tapping the sample tube to release samples in trace amounts, and the third slideway is slidingly connected to a sample head clamping part for finishing the mounting or dismounting of a sample head and the sample tube, and the fourth slideway is slidingly connected to a sample loosening pestle for crushing agglomerated samples inside the sample tube;
wherein the fine-tuning sample releasing mechanism comprises a supporting rod II, a balancing rod, an upward sample applicator and a downward sample applicator, wherein one end of the supporting rod II is slidingly connected to the second slideway, and the other end is connected to the middle of the balancing rod: the balancing rod is arranged horizontally, with one end being connected to a bottom of the upward sample applicator, while the other end being connected to the downward sample applicator through a fulcrum rod: the upward sample applicator and the fulcrum rod are both arranged vertically, the bottom of the fulcrum rod being connected to the balancing rod, the top being connected to the top of the downward sample applicator; and
a retractable sample application head I is provided on the top of the upward sample applicator, and the sample application head I is configured to tap middle and lower parts of the sample tube, to promote samples inside the sample tube to move outwards: a retractable sample application head II is provided on the bottom of the downward sample applicator, and the sample application head II is configured to tap the sample head, to promote samples in the sample head to move outwards.

2. The high-precision automatic weighing device for powder samples according to claim 1 , wherein the mechanical claw comprises a supporting rod I and a gripper which is openable and closable, one end of the supporting rod I being slidingly connected to the first slideway, the other end being rotationally connected to a closed end of the gripper through an adapter member; and
the gripper is circular, the gripper being composed of two semi-circular frames which are symmetrically arranged, and two corresponding ends on the same side of each of the two semicircular frames are connected in an articulated manner to form the closed end, and two corresponding ends on the other side can be opened and closed freely to form an opening and closing end; when a cylindrical sample tube needs to be grabbed, the opening and closing end of the gripper is open, and the gripper descends, such that a tube head of the sample tube penetrates through the inside of the gripper, and then the opening and closing end is closed, and the gripper is tightly wrapped on an outer wall of the sample tube.

3. The high-precision automatic weighing device for powder samples according to claim 2 , wherein a rotator and an angle sensor are provided at the position where the supporting rod I is connected to the adapter member, and the rotator can control rotation of the gripper, and the angle sensor can monitor in real time the rotation angle of the gripper, and further control the inclination angle of the sample tube.

4. The high-precision automatic weighing device for powder samples according to claim 1 , wherein the sample head is conical and is small at the top and large at the bottom with an opening at the top for pouring out samples, and the bottom is vertical and an inner wall is provided with internal threads to adapt to external threads on an outer wall on the top of the sample tube, so as to facilitate threaded connection between the sample head and the sample tube; the sample head is hollow inside and is provided with continuous spiral textures protruding inwards on the inner wall, and a plurality of circles of spiral textures are spirally provided from top to bottom along a circumferential direction of the sample head, the spiral textures extending from the top opening of the sample head to the position above the bottom of the sample head, and the spiral textures are not connected to the above-mentioned internal threads.

5. The high-precision automatic weighing device for powder samples according to claim 1 , wherein the sample head clamping part comprises a rotating motor, a water baffling plate and a holder which are provided in sequence from top to bottom, wherein the rotating motor is slidingly connected to the third slideway through a sliding block, and a rotating shaft of the rotating motor penetrates through the water baffling plate and is connected to the holder, so as to drive the water baffling plate and the holder to rotate; and the water baffling plate can prevent the water used for cleaning the sample head from rushing to the rotating motor; and
the holder is a retractable and liftable three-claw holder; in terms of holding position, the holder comprises two operating positions; the first operating position is a clamping position in which the three claws are all close to the circle center of the holder, and at this time, inner walls of the three claws can be tightly pressed against the outer side surface at the bottom of the sample head, so that the sample head is clamped; the second operating position is a relaxation position in which the three claws are all far away from the circle center of the holder, and at this time, the three claws do not contact the sample head, so that the sample head is not clamped; the top of the three claws is articulated with a telescopic rod, which is capable of moving the three claws up and down.

6. The high-precision automatic weighing device for powder samples according to claim 1 , wherein the cleaning area comprises a sink, a waterproof wall, a sprinkler and at least two blow dryers, wherein the sink is configured to reserve water for cleaning the sample head and a sample loosening pestle, and the waterproof wall is arranged around the sink to prevent water sprayed onto the sample head or the sample loosening pestle by the sprinkler from splashing onto the outside of the sink;
the sprinkler is inside the sink and is provided with a water pump at the bottom and a nozzle at the top, and the water pump feeds water in the sink into the sprinkler and then sprays water out of the nozzle; and
the two blow dryers are symmetrically arranged on the outer side of the sink, and an air outlet is

Assignees

• Inst Geology & Geophysics Cas

Inventors

• Xue Dingshuai
• Zhang Danping
• Liu Yanhong
• Guo Shun
• Wang Xiangli
• Wan Bo

Classifications

• G01B21/22

  for measuring angles or tapers; for testing the alignment of axes · CPC title

• B08B2209/032

  by the mechanical action of a moving fluid · CPC title

• B08B9/0321

  using pressurised, pulsating or purging fluid (E04F17/126 takes precedence) · CPC title

• B08B3/02 Primary

  Cleaning by the force of jets or sprays · CPC title

• G01G13/006 Primary

  Container supply or discharge mechanism (means for automatic loading or discharging G01G13/02, G01G13/16, G01G13/24) · CPC title