CN201045587Y

CN201045587Y - Device for improving weighing precision of weightless balance

Info

Publication number: CN201045587Y
Application number: CNU2007200852558U
Authority: CN
Inventors: 胡西雷; 叶斌
Original assignee: WUHAN KEHENG INDUSTRIAL ENGINEERING Co Ltd
Current assignee: WUHAN KEHENG INDUSTRIAL ENGINEERING Co Ltd
Priority date: 2007-06-15
Filing date: 2007-06-15
Publication date: 2008-04-09
Anticipated expiration: 2017-06-15

Abstract

The utility model discloses a device for improving weighing precision of a weightlessness steelyard, which relates to a weightlessness steelyard. The utility model comprises a weighing transducer (1), a matching block (2), a lever (3), a supporting point (4), a weighing frame (5), a weighing bucket and a discharging mechanism (6). The lever (3) is arranged on the supporting point (4), the weighing transducer (1) and the matching block (2) are arranged on the long arm end of the lever (3), and the weighing frame (5) is connected on the short arm end of the lever (3), and the weighing bucket and a discharging mechanism (6) are arranged on the weighing frame (5). The utility model can improve weighing precision, particularly when full weight is more than weighting, and the transducer with fewer loads can get more measurement range by the lever. Changing a transducer is more convenient, and the utility model is convenient for maintaining. The utility model is applicable to the improvements of a weightlessness steelyard, and a weigh hopper and the like.

Description

A kind of device that improves weightless scale weighing precision

Technical field

The utility model relates to a kind of weightless scale, relates in particular to a kind of device that improves weightless scale weighing precision.

Background technology

Weightless scale is a kind of burden balance of continuous measurement, it can be according to the stability of flow of setting, accurately, outputting material continuously.Current, the measurement of weightless weighing amount is all undertaken by LOAD CELLS.The structure of existing weightless scale is to hang scale bucket and shedding mechanism by many LOAD CELLS; LOAD CELLS must be chosen the size of specified range according to following rule:

Weight (abbreviation the gross weight)+weight of material of the specified range＞scale bucket of LOAD CELLS and shedding mechanism.

So improve the precision of whole scale following two kinds of methods are arranged:

1, improves the precision of LOAD CELLS;

2, reduce gross weight.

Because the precision of LOAD CELLS is limited, can not significantly improve, so can only reduce gross weight, improve the ratio of weight of material in full scale.

For example: gross weight is 100kg, and weight of material is 100kg, so must select the LOAD CELLS of 200kg.If the precision of LOAD CELLS is 0.02%, then resultnat accuracy is 200kg * 0.02%=0.04kg.

If gross weight is 0kg, weight of material is 100kg, so can select the LOAD CELLS of 100kg.Equally, the precision of LOAD CELLS is 0.02%, and then resultnat accuracy is 100kg * 0.02%=0.02kg.So just can improve one times of resultnat accuracy.

Summary of the invention

The purpose of this utility model just is to overcome the above-mentioned shortcoming and defect that prior art exists, and a kind of device that improves weightless scale weighing precision is provided, and it is a kind of scale bucket gross weight compensation system based on Machine Design.

The purpose of this utility model is achieved in that

As Fig. 1, the utility model comprises LOAD CELLS (1), balancing weight (2), lever (3), fulcrum (4), the frame of weighing (5), scale bucket and shedding mechanism (6);

Be lever (3) on the fulcrum (4), be connected with LOAD CELLS (1) and balancing weight (2) at the long arm end of lever (3), be connected with the frame of weighing (5) at the galianconism end of lever (3), the frame of weighing (5) is provided with scale bucket and shedding mechanism (6).

Principle of work of the present utility model is:

The two ends of lever (3) are asymmetrical design, and promptly sensor (1) and balancing weight (2) are at the long arm end of lever (3), and scale bucket and shedding mechanism (6) are at the galianconism end of lever (3), and the weight when adjusting balancing weight (2) can compensate gross weight.

For example: when the ratio of the long and short arm of lever (3) was 10: 1, gross weight was 100kg, and the weight of balancing weight is 10kg, and this moment, the stressed of sensor was 0kg, thereby compensated gross weight.

The utlity model has following advantage and good effect:

1, can the raising weighing precision, particularly when gross weight when weighing.

2, can realize obtaining relatively large journey by lever, reduce cost with the sensor of less load

3, more emat sensor is convenient, is convenient to safeguard.

4, the utility model is applicable to the improvement of weightless scale, bunker scale etc.

Description of drawings

Fig. 1 is this apparatus structure schematic diagram;

Fig. 2 .1 is the example structure front view;

Fig. 2 .2 is the example structure side view;

Fig. 2 .3 is the example structure vertical view;

Fig. 2 .4 is Fig. 2 .1 partial enlarged drawing.

Wherein:

The 1-LOAD CELLS;

The 2-balancing weight;

The 3-lever, 3.1-sounding rod, 3.1-Z type piece;

The 4-fulcrum;

The 5-frame of weighing;

6-scale bucket and shedding mechanism;

The 7-support;

8.1-the 1st steel disc, 8.2-the 2nd steel disc.

Embodiment

Describe in detail below in conjunction with drawings and Examples:

As Fig. 2 .1,2.2,2.3,2.4, the structure of present embodiment is:

On the basis of Fig. 1, lever (3) comprises long-armed sounding rod (3.1) and galianconism Z type piece (3.2); Be provided with support (7) and the 1st, 2 steel discs (8.1,8.2).

Lever (3) comprises long-armed sounding rod (3.1) and galianconism Z type piece (3.2) on the both sides of fulcrum (4); Lever (3) is located to be suspended on the support (7) by the 1st steel disc (8.1) at fulcrum (4), the top of sounding rod (3.1) connects LOAD CELLS (1) and balancing weight (2), the top of Z type piece (3.2) is hung with the frame of weighing (5) by the 2nd steel disc (8.2), is connected with scale bucket and shedding mechanism (6) on the frame of weighing (5).

Each functions of components is as follows:

LOAD CELLS (1), a kind of standard weights sensor, its function is that weight signal is converted to electric signal, and the listing product is arranged.

Balancing weight (2), a kind of derby, its function is the weight of compensation scale bucket and shedding mechanism (6).

Sounding rod (3.1), a kind of Metallic rod, its function provide the long-armed limit of lever (3).

Z type piece (3.2), a kind of derby of zigzag, its function provides the galianconism limit of lever (3).

The 1st steel disc (8.1), a kind of stalloy, its function is for lever (3) provides fulcrum (4), and is suspended on the support (7).

The 2nd steel disc (8.2), a kind of stalloy, its function is to hang the frame (5) of weighing.

The frame (5) of weighing, a kind of supporting frame, its function is to support scale bucket and shedding mechanism (6).

Support (7), a kind of metal supporting frames, its function are to support whole weightless scale.

After the present embodiment manufacturing is finished, when weightlessness claims empty scale,, allow LOAD CELLS (1) be output as zero,, improve weighing precision to reach the counteracting gross weight by regulating the weight of balancing weight (2).

Claims

1. device that improves weightless scale weighing precision is characterized in that:

Comprise LOAD CELLS (1), balancing weight (2), lever (3), fulcrum (4), the frame of weighing (5), scale bucket and shedding mechanism (6);

2. by the described a kind of device that improves weightless scale weighing precision of claim 1, it is characterized in that:

Lever (3) comprises long-armed sounding rod (3.1) and galianconism Z type piece (3.2); Be provided with support (7) and the 1st, 2 steel discs (8.1,8.2);