CN218566649U

CN218566649U - Automatic weighing instrument

Info

Publication number: CN218566649U
Application number: CN202222252901.2U
Authority: CN
Inventors: 程杲
Original assignee: Nanjing Wuyu Industrial Automation Technology Co ltd
Current assignee: Nanjing Wuyu Industrial Automation Technology Co ltd
Priority date: 2022-08-25
Filing date: 2022-08-25
Publication date: 2023-03-03
Anticipated expiration: 2032-08-25

Abstract

The utility model provides an automatic weighing instrument, relating to the technical field of weighing equipment, comprising a box body, wherein a box door is hinged on the box body; a weighing balance is arranged in the box body; a weighing container throwing mechanism is arranged on one side of the weighing balance close to the box door; a feeding mechanism is arranged above the weighing balance; the weighing container throwing mechanism comprises a sample carrying disc which can move up and down and is arranged in a rotating mode; a plurality of sample placing holes are distributed on the sample carrying disc in an annular array; placing a crucible in the lofting hole; the crucible can rotate to the upper part of the weighing balance in the rotation process of the sample carrying disc. The utility model discloses an automatic weighing instrument can interval feed many times through throwing material mechanism, and the feed is accurate quick more, and whole automatic weighing instrument is automatic to be weighed, and work efficiency is high.

Description

Automatic weighing instrument

Technical Field

The utility model relates to a weighing-appliance technical field especially relates to an automatic weighing instrument.

Background

Reagent weighing is an essential component in the research and development process in the fields of materials, chemical engineering, biology and the like, and the precision of reagent weighing is the premise of influencing whether the research and development experiment result is accurate.

The existing reagent weighing methods are mostly manual weighing, a weighing container such as a crucible is manually placed on a weighing balance, a glass door is closed, the glass door is opened after peeling, a reagent is put in, the glass door is closed, data is read, the reagent is continuously added or reduced according to data selection, and the glass door is closed to read the data. The process needs to be repeated for many times, the operation is very complicated, the workload is large, especially for batch weighing, very much time is consumed, and the efficiency is very low. And the reagent easily receives external environment's influence in the in-process of repeated switch glass door, for example some reagents that the hydroscopicity is bigger, and the weight gain of easily absorbing water in the weighing process causes and weighs inaccurately.

The automation of the existing weighing instrument is low, the feeding control is not accurate enough, the weighing error is large, some weighing instruments also need to move the weighing balance to match the crucible for weighing, the repeated movement of the weighing balance easily causes the levelness of the weighing balance to change, and the weighing result is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an automatic weighing instrument to solve above-mentioned technical problem.

In order to achieve the purpose, the automatic weighing instrument comprises a box body, wherein a box door is hinged on the box body; a weighing balance is arranged in the box body; a weighing container throwing mechanism is arranged on one side of the weighing balance close to the box door; a feeding mechanism is arranged above the weighing balance;

the weighing container throwing mechanism comprises a sample carrying disc which can move up and down and is arranged in a rotating mode; a plurality of sample placing holes are distributed on the sample carrying disc in an annular array; placing a crucible in the lofting hole; the crucible can rotate to the upper part of the weighing balance in the rotation process of the sample carrying disc;

the feeding mechanism comprises a supporting plate, a discharging disc and a feeding bin; the supporting plate is fixed on a bracket which is fixed on a bottom plate of the box body; the material placing disc consists of a disc body and a disc cover; a circular groove is arranged in the disc body; a disc is arranged in the groove; a rotating shaft is arranged at the center of the groove; the disc is fixedly connected with the rotating shaft; the rotating shaft is rotatably connected with the disc body and the supporting plate; the rotating shaft is driven by a servo motor; a plurality of first material leaking holes are distributed on the disc in an annular array; second material leaking holes corresponding to the first material leaking holes are formed in the tray body and the supporting plate, a feeding funnel is arranged below the second material leaking holes, and the feeding funnel is fixed to the bottom of the supporting plate; a discharge port at the bottom of the feeding funnel is positioned above the weighing balance; the feeding bin is fixed on the tray cover; and a third material leakage hole is formed in the tray cover, the third material leakage hole is communicated with a discharge hole of the feeding bin, and the third material leakage hole corresponds to the first material leakage hole in position.

Furthermore, the weighing container throwing mechanism comprises a fixing plate and a lifting plate; the fixed plate is fixed on the bottom plate of the box body through a connecting rod; a first stepping motor is arranged on the fixed plate; the movable end of the first stepping motor is connected with the lifting plate through a ball screw structure; a plurality of guide posts are fixed at the upper end of the fixing plate; the guide post is sleeved with the guide cylinder in a sliding manner; the guide cylinder is fixed at the lower end of the lifting plate; the sample carrying disc is arranged above the lifting plate and is detachably connected with the rotating disc; the rotating disc is rotationally connected with the lifting plate; the rotating disc is driven by a second stepping motor; the second stepping motor is installed on the lifting plate.

Preferably, the sample carrying plate is positioned on the rotating plate through a ball pin.

Further, the box door is connected with an opening and closing mechanism; the opening and closing mechanism comprises an electric push rod; the fixed end of the electric push rod is rotatably connected with the U-shaped joint; the U-shaped joint is fixed on a bottom plate of the box body; the movable end of the electric push rod is rotatably connected with the box door.

Preferably, a first belt pulley is fixed on the rotating shaft; a second belt pulley is fixed at the movable end of the servo motor; the first belt pulley and the second belt pulley are connected through a transmission belt.

Preferably, an electric clamp is arranged on the supporting plate; the discharging pipe of the feeding funnel is positioned between the two clamping plates of the electric clamp.

Preferably, a first detection rod is fixed on the rotating shaft; the supporting plate is provided with a first position sensor corresponding to the first detection rod.

Preferably, a second detection rod is fixed at the fixed end of the electric push rod, and a second position sensor corresponding to the second detection rod is arranged on the support.

Preferably, a third detection rod is fixed at the bottom of the lifting plate, and a third position sensor corresponding to the third detection rod is arranged at the top end of the fixing plate.

Preferably, the side surfaces of the box door and the box body are provided with observation windows.

In addition, the automatic weighing instrument is controlled by a control system to operate, and the weighing balance, the first position sensor, the second position sensor and the third position sensor are all connected with the control system.

Has the advantages that: the automatic weighing instrument of the utility model can feed materials at intervals for many times through the feeding mechanism, and the feeding is more accurate and rapid; a plurality of crucibles can be placed at one time through the sample loading disc without repeatedly opening and closing the box cover, so that the influence of the external environment on the weighing accuracy is avoided; the sample carrying disc is rotated and moves up and down to place the crucible on the balance, the balance does not need to move up and down, and the weighing error caused by the repeated movement of the balance is avoided; the case cover is connected with the opening and closing mechanism and can be automatically opened and closed. The whole automatic weighing instrument is used for automatic weighing and has high working efficiency.

Drawings

Fig. 1 is a schematic view of an external structure of the automatic weighing apparatus of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the automatic weighing apparatus of the present invention.

Fig. 3 is a side view schematic structural diagram of the feeding mechanism of the present invention.

Fig. 4 is the schematic view of the discharging tray decomposition structure of the feeding mechanism of the present invention.

Fig. 5 is a schematic front view of the feeding mechanism of the present invention.

Fig. 6 is a schematic structural view of a weighing container dropping mechanism.

Fig. 7 is a schematic view showing a positional relationship between the second detection lever and the second position sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the word "comprising" and similar words are intended to mean that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.

To the problem that prior art exists, the embodiment of the utility model provides an automatic weighing instrument.

Examples

As shown in fig. 1~7, an automatic weighing apparatus includes a box 1, on which a box door 2 is hinged; a weighing balance 3 is arranged in the box body; a weighing container throwing mechanism is arranged on one side of the weighing balance 3 close to the box door 2; a feeding mechanism is arranged above the weighing balance 3;

referring to fig. 2, the weighing container dropping mechanism includes a sample carrier plate 4 which is movable up and down and is rotatably provided; a plurality of sample placing holes are distributed on the sample carrying disc 4 in an annular array; placing a crucible 5 in the lofting hole; the crucible 5 can rotate to the upper part of the weighing balance 3 in the rotation process of the sample carrying disc 4; the outer diameter of the opening of the crucible 5 is larger than the radius of the sample placing hole, the crucible 5 is placed in the sample placing hole, the sample carrying disc 4 rotates to the position above the weighing balance 3, the sample carrying disc 4 moves downwards, the crucible 5 falls on the weighing balance 3, and the sample carrying disc 4 does not support the crucible 5 any more.

Referring to fig. 3~5, the charging mechanism includes a support plate 6, a discharge tray 7, and a charging bin 8; the supporting plate 6 is fixed on a bracket 9, and the bracket 9 is fixed on a bottom plate of the box body 1; the material placing disc 7 consists of a disc body 7-1 and a disc cover 7-2; a circular groove is arranged in the tray body 7-1; a disc 10 is arranged in the groove; a rotating shaft 11 is arranged at the center of the groove; the disc 10 is fixedly connected with a rotating shaft 11; the rotating shaft 11 is rotatably connected with the disc body 7-1 and the supporting plate 6; the rotating shaft 11 is driven by a servo motor 12; a plurality of first material leaking holes are distributed on the disc 10 in an annular array; a second material leaking hole corresponding to the first material leaking hole is formed in the tray body 7-1 and the supporting plate 6, a feeding funnel 13 is arranged below the second material leaking hole, and the feeding funnel 13 is fixed at the bottom of the supporting plate 6; a discharge port at the bottom of the feeding funnel 13 is positioned above the weighing balance 3; the feeding bin 8 is fixed on the disc cover 7-2; and a third material leakage hole is formed in the disc cover 7-2 and communicated with a discharge hole of the feeding bin 8, and the third material leakage hole corresponds to the first material leakage hole in position. The top of the feeding bin 8 is also provided with a bin cover (not shown in the figure) with a sealing ring.

A sample is put in through the feeding bin 8, the sample falls into a first material leakage hole of the disc 10 through a discharge hole of the feeding bin 8 and a third material leakage hole on the disc cover 7-2, the disc 10 rotates along with the rotating shaft 11, and when the positions of the first material leakage hole of the disc 10, the disc body 7-1 and a second material leakage hole on the supporting plate 6 are partially overlapped, the sample falls into the feeding funnel 13 and falls into a crucible on the weighing balance 3 through the feeding funnel 13; the weighing balance 3 weighs, and the feeding mechanism stops feeding when the set weight is reached.

The disc 10 is driven by a servo motor 12, so that the controllability of the rotation angle is ensured, a plurality of first material leaking holes are uniformly arranged on the disc 10, the volume of a sample falling into the first material leaking holes of the disc 10 is constant, and the mass of a specific reagent is also constant; therefore, when can obtain to put in appointed quality reagent through the calculation, servo motor needs the rotatory number of turns to realize accurate feed. The feeding process does not need to be carried out slowly all the time to ensure the feeding precision, but the feeding is carried out in a mode of first quick feeding and then slow feeding, so that the feeding speed is ensured.

Referring to fig. 2 and 6, the weighing container dropping mechanism includes a fixed plate 14 and a lifting plate 15; the fixed plate 14 is fixed on the bottom plate of the box body 1 through a connecting rod; the fixed plate 14 is provided with a first stepping motor 16; the movable end of the first stepping motor 16 is connected with the lifting plate 15 through a ball screw structure; a plurality of guide posts 17 are fixed at the upper end of the fixing plate 14; the guide post 17 is sleeved with the guide cylinder 18 in a sliding manner; the guide cylinder 18 is fixed at the lower end of the lifting plate 15; the sample carrying disc 4 is arranged above the lifting plate 15, and the sample carrying disc 4 is detachably connected with a rotating disc (not shown in the figure); specifically, the sample loading disc 4 is positioned on the rotating disc through a ball pin; the rotating disc is rotationally connected with the lifting plate; the rotating disc is driven by a second stepper motor 19; the second stepping motor 19 is installed on the elevating plate 15. The first stepping motor 16 rotates and pushes the lifting plate 15 to move up and down through a ball screw structure, the guide post 17 is matched with the guide cylinder 18 for guiding, and the second stepping motor 19 drives the rotating disc to rotate so as to drive the sample carrying disc 4 to rotate.

Referring to fig. 2, the door 1 is connected to an opening and closing mechanism; the opening and closing mechanism comprises an electric push rod 20; the fixed end of the electric push rod 20 is rotatably connected with a U-shaped joint 21; the U-shaped joint 21 is fixed on the bottom plate of the box body 1; the movable end of the electric push rod 20 is connected with the box door 2 in a rotating way.

Referring to fig. 5, a first pulley 22 is fixed to the rotating shaft 11; a second belt pulley 23 is fixed at the movable end of the servo motor 12; the first pulley 22 and the second pulley 23 are connected by a drive belt (not shown in the figure).

An electric clamp 24 is arranged on the supporting plate 6; the outlet pipe of the charging hopper 13 is located between two clamping plates 25 of the motorized gripper 24. Carry the feeder sleeve of throwing material funnel 13 through electric fixture 24, guarantee that the feeding process is more steady, reduce vibrations.

A first detection rod 26 is fixed on the rotating shaft 11; the support plate 6 is provided with a first position sensor 27 corresponding to the first detection lever 26.

Referring to fig. 7, a second detection rod 28 is fixed to the fixed end of the electric push rod 20, and a second position sensor 29 corresponding to the second detection rod 28 is provided on the bracket 9.

Referring to fig. 6, a third detection rod 30 is fixed to the bottom of the elevating plate 15, and a third position sensor 31 corresponding to the third detection rod 30 is provided at the top end of the fixing plate 14.

The side surfaces of the box door 2 and the box body 1 are both provided with observation windows. The working conditions inside the box body 1 can be seen through the observation window.

The automatic weighing apparatus is controlled by a control system, and the weighing balance 3, the first position sensor 27, the second position sensor 29 and the third position sensor 31 are all connected with the control system. The automatic operation of the weighing instrument can be realized through the control system.

The utility model discloses an automatic weighing instrument during operation places the crucible on carrying sample disc 4, will carry sample disc 4 to install on the rotary disk, and the mechanism that opens and shuts closes chamber door 1 places crucible 5 through weighing container feeding mechanism and weighs balance 3 on, weighs balance 3 and peels the back, and feeding mechanism puts in reagent, reaches the weight of setting after, and feeding mechanism stops to put in reagent and accomplishes weighing, takes out and carries sample disc 4, takies away the crucible away.

Although the embodiments of the present invention have been described in detail hereinabove, it is apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it is to be understood that such modifications and variations are within the scope and spirit of the present invention as set forth in the appended claims. Moreover, the invention as described herein is capable of other embodiments and of being practiced or of being carried out in various ways.

Claims

1. An automatic weighing instrument is characterized by comprising a box body, wherein a box door is hinged on the box body; a weighing balance is arranged in the box body; a weighing container throwing mechanism is arranged on one side of the weighing balance close to the box door; a feeding mechanism is arranged above the weighing balance;

the feeding mechanism comprises a supporting plate, a discharging disc and a feeding bin; the support plate is fixed on the bracket, and the bracket is fixed on the bottom plate of the box body; the material placing disc consists of a disc body and a disc cover; a circular groove is arranged in the disc body; a disc is arranged in the groove; a rotating shaft is arranged at the center of the groove; the disc is fixedly connected with the rotating shaft; the rotating shaft is rotatably connected with the disc body and the supporting plate; the rotating shaft is driven by a servo motor; a plurality of first material leaking holes are distributed on the disc in an annular array; second material leaking holes corresponding to the first material leaking holes are formed in the tray body and the supporting plate, a feeding funnel is arranged below the second material leaking holes, and the feeding funnel is fixed to the bottom of the supporting plate; a discharge port at the bottom of the feeding funnel is positioned above the weighing balance; the feeding bin is fixed on the tray cover; and a third material leakage hole is formed in the disc cover and communicated with a discharge hole of the feeding bin, and the third material leakage hole corresponds to the first material leakage hole in position.

2. The automated weighing apparatus of claim 1, wherein the weighing container deposit mechanism comprises a fixed plate and a lifting plate; the fixed plate is fixed on the bottom plate of the box body through a connecting rod; a first stepping motor is arranged on the fixed plate; the movable end of the first stepping motor is connected with the lifting plate through a ball screw structure; a plurality of guide posts are fixed at the upper end of the fixing plate; the guide post is sleeved with the guide cylinder in a sliding manner; the guide cylinder is fixed at the lower end of the lifting plate; the sample carrying disc is arranged above the lifting plate and is detachably connected with the rotating disc; the rotating disc is rotationally connected with the lifting plate; the rotating disc is driven by a second stepping motor; the second stepping motor is installed on the lifting plate.

3. An automated weighing apparatus according to claim 2 wherein the load port door is connected to the opening and closing mechanism; the opening and closing mechanism comprises an electric push rod; the fixed end of the electric push rod is rotatably connected with the U-shaped joint; the U-shaped joint is fixed on a bottom plate of the box body; the movable end of the electric push rod is rotatably connected with the box door.

4. An automatic weighing apparatus according to claim 3 wherein a first pulley is fixed to the shaft; a second belt pulley is fixed at the movable end of the servo motor; the first belt pulley and the second belt pulley are connected through a transmission belt.

5. An automatic weighing apparatus according to claim 4 wherein the support plate is provided with a powered clamp; the discharge pipe of the feeding funnel is positioned between the two clamping plates of the electric clamp.

6. An automatic weighing apparatus according to claim 5 wherein a first sensing bar is fixed to the shaft; a first position sensor corresponding to the first detection rod is arranged on the supporting plate;

a second detection rod is fixed at the fixed end of the electric push rod, and a second position sensor corresponding to the second detection rod is arranged on the support;

and a third detection rod is fixed at the bottom of the lifting plate, and a third position sensor corresponding to the third detection rod is arranged at the top end of the fixing plate.

7. An automatic weighing apparatus according to claim 6 wherein the sides of the bin door and bin body are provided with viewing windows.

8. An automated weighing apparatus according to claim 7 wherein the automated weighing apparatus is controlled by a control system, the weighing balance, the first position sensor, the second position sensor and the third position sensor being connected to the control system.