CN2180978Y

CN2180978Y - Material level meter

Info

Publication number: CN2180978Y
Application number: CN 93218876
Authority: CN
Inventors: 孙凯
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-07-20
Filing date: 1993-07-20
Publication date: 1994-10-26
Anticipated expiration: 2003-07-20

Abstract

The utility model relates to a material level meter which is composed of a round disc, a pulley, a weight dropper and a lever, wherein, one end of the lever is supported on a knife edge, and the other end of the lever is connected with a stress sensor; a pulley of which one side is suspended with the weight dropper is arranged in the middle part of the lever; a wire rope which is used for suspending the weight dropper is wound on the round disc after the wire rope is wound on the pulley. When the utility model is used, the wire rope is loosened, the weight dropper falls, the suspended wire rope is prolonged, weight is increased, and the stress of the stress sensor is increased; after the weight dropper drops onto materials, the stress on the sensor decreases suddenly; the top surface position of the materials can be measured by that an instrument marks the special line length of the wire rope through the stress variation on the stress sensor. The utility model has the advantages of simple structure, firmness, durability and accurate measurement.

Description

Material level meter

The utility model relates to a kind of level-sensing device, belongs to a kind of measuring apparatus.

Existing measurement heap section level-sensing device highly, the general instrument that adopts, its mechanical part as shown in Figure 1, promptly pull out wire rope around the disk 1 of full wire rope by motor-driven, this rope is walked around pulley 2,3 and is connected with weight 9 in the end of wire rope 1 at last, because the action of gravity of weight 9 pulls down pulley 3, Rocker arm 5 is rotated lean against at last on the limited block 12.During work, because of having a circle aperture at wheel 2 with the limit, the two sides of respective apertures is equipped with luminotron 11 and photoelectric tube 10 respectively, wheel 2 just produces electric impulse signal when rotating on photoelectric tube, calculate wire rope by pulse signal and walk line length, when dropping on the material table face under the weight, wheel 2 stops operating, under the pulling of extension spring 6, Rocker arm 5 upwards rotates, and pushes switch 7, switch 7 is connected, so send the signal that weight arrives charge level, can pull out length according to wire rope, record controlling level.Disk 1 backward rotation is regained wire rope then, carries on the weight, prepares next time and uses.

In use there is following problem in this physical construction:

1, luminotron and photoelectric tube are stained with dust easily, as untimely cleaning, with regard to cisco unity malfunction.

2, when equipment is not worked, above weight was hung in always, extension spring was in extended state always, and is so long-term, and tension spring descends, and makes work unreliable.

3, switch 7 is easy to cause the contact corrosion, loose contact in dusty environment.

4, rocking shaft 8 is in dusty environment, and lubricated being difficult to guarantees, uses a period of time just to rotate ineffective.

For this reason, above-mentioned this level-sensing device, fault is many in the use, must often adjust and safeguard, but the mechanical part of level-sensing device all is mounted in very high top, material storehouse, it is very inconvenient to keep in repair, general dust on the material storehouse, aqueous vapor are very big again, and workman's working condition is poor, and it is very arduous to work.

The purpose of this utility model is that a kind of improved level-sensing device will be provided, and it is simple in structure, is not afraid of the influence of dust and aqueous vapor, and maintenance capacity is little, and measures accurately.

The purpose of this utility model is achieved in that this level-sensing device is made of disk, pulley, weight, lever.One end of lever props up on the edge of a knife, and the other end is connected with strain gauge, Yi Bian suspend the middle part that the pulley of weight is installed in lever in midair, the wire rope of suspention weight is walked around behind the pulley on disk, during use, loosens wire rope, weight falls, the suspension wire rope elongation, and weight increases, the stressed increase of strain gauge, after weight is fallen on the material, stressedly on the sensor reduce suddenly, change by the strain gauge upper stress, walk line length by the instrumental calibration wire rope, thereby record the material top side location.

The utility model maintains static basically owing to used lever, just, observe the variation of strain gauge upper stress, measure material level by the traveling of steel rope, and strain gauge itself is exactly a hermetically-sealed construction, be not subject to aqueous vapor and effect of dust, thus simple in structure firm durable, do not need often maintenance and adjustment, so measure accurately, corresponding reduction measuring cost alleviates labor strength, and is easy to use.

Concrete structure of the present utility model is provided by following examples and accompanying drawing thereof:

Fig. 1 is existing level-sensing device structural representation.

Fig. 2 is the utility model structural representation.

Describe in detail below in conjunction with accompanying drawing.

With reference to Fig. 2: the utility model is made of the disk 1 that is wound with wire rope, pulley, weight 6 levers 4, and an end of lever 4 props up on the edge of a knife 7, and the other end is connected with strain gauge 8; The pulley 3 that suspends weight 6 on one side in midair is installed in the middle part of lever 4; The wire rope 5 of suspention weight 6 is walked around pulley 3, and directed pulley 2 is on disk 1.The position of directed pulley 2 will make the wire rope maintenance plumbness of 3 on itself and pulley, and to record Gravity changer accurate so that make.During use,, loosen wire rope by motor-operated disk 1 rotation, weight 6 falls, be suspended in the wire rope lengthening on the weight, weight is strengthened, be positioned at strain gauge 8 stressed must correspondingly increases of lever one end, after weight 6 is fallen on the material, stressed must the minimizing suddenly on the sensor 8 by the variation of strain gauge upper stress, calculated by instrumental calibration, just can draw the line length of walking of wire rope, thus the position that records the material end face.Wire rope is regained in disk 1 reverse rotation more then, and weight is got back to original position again, prepares to use again.

What install on the lever 4 among the figure is pulling force sensor 8, as below the lever of its relative position, places a pressure transducer and replaces pulling force sensor 8, also can reach effect same.

Claims

1, a kind of level-sensing device, by the disk that is wound with wire rope (1), pulley weight (6), lever (4), constitute, it is characterized in that:

1) end of lever (4) props up on the edge of a knife (7), and the other end is connected with strain gauge (8);

2) pulley (3) that suspends on one side weight (6) in midair is installed in the middle part of lever (4);

3) wire rope (5) of suspention weight (6) is walked around pulley (3), and directed pulley (2) is on disk (1).

2, by the described level-sensing device of claim 1, the position that it is characterized in that described directed pulley 2 makes the wire rope maintenance plumbness of 3 on itself and pulley.

3, it is characterized in that by the described level-sensing device of claim 1 described strain gauge can be with pulling force sensor or pressure transducer.