CN2180980Y

CN2180980Y - Gear transmission liquid level sensor

Info

Publication number: CN2180980Y
Application number: CN 93243863
Authority: CN
Inventors: 孙成功; 李精国; 尹兴涛
Original assignee: No4 Oil Prodn Plant Daqing Petroleum Administration
Current assignee: No4 Oil Prodn Plant Daqing Petroleum Administration
Priority date: 1993-11-04
Filing date: 1993-11-04
Publication date: 1994-10-26
Anticipated expiration: 2003-11-04

Abstract

The utility model relates to a gear transmission liquid level sensor for automatic measure. A measured medium can not be contacted by the utility model and can be measured with linear method. The utility model is characterized in that a case is divided into two chambers 4, 7, a big and a small gears 4, 7 meshing with each other are arranged in a chamber 14, and the teeth number of the big gear is 136 and the number ratio of the big and the small gears is 8: 1. A big gear shaft 1 passing through a case wall is connected with a float connection rod in a measured container, and a small gear shaft 6 penetrating into a partition board is assembled with a built-in linear potentiometer 9. An inserting chamber (15) arranged on the case wall of one side of the potentiometer has microcomputer interfaces 12, 13, and the potentiometer is connected in parallel to an interface circuit.

Description

Gear transmission liquid level sensor

The utility model is to cooperate microcomputer simulation circuit 0-5V voltage-regulation to realize the sensor of the liquid level control of oil, water pot, separation vessel and other container, belongs to a kind of gear-driven liquid level sensor.

In order to improve the measuring accuracy of oil, water pot and separation vessel, must control liquid level automatically.At present, the technology of control adopts dry-reed liquid level gauge and capacitor-type level meter more.The measurement of dry-reed liquid level gauge is not successional, curved property, and its measuring accuracy does not reach the automatic gauge requirement, thereby has influenced the precision of automatic gauge.Though capacitive level probe is straightness measurement, because probe is to be dipped in the measured medium, when dielectric surface had the profit mixolimnion, normal adhesive tape had oily thing on the probe, and resolution is reduced, and the liquid level of being surveyed is inaccurate, also influences the automatic gauge precision.

The purpose of this utility model is to avoid above-mentioned deficiency of the prior art, not influenced by dielectric surface oil thing and the gear drive liquid level sensor of property linearly and provide a kind of, can improve measuring accuracy.

Essence of the present utility model is that the floating ball rod connector in tested container has the Large Gear Shaft During of 136 teeth to be connected with outside; What be meshed has a pinion wheel, and the gear ratio on the big steamboat is 8:1, and pinion wheel drives linear potentiometer, and potentiometer is connected in parallel on the microcomputer interface circuit.Because the rotation of floating ball rod in liquid comes transmission gear to drive the rotation of potentiometer, can get corresponding signal from the center tap of potentiometer, controls the purpose that liquid level reaches automatic gauge by microcomputer.

The utility model is compared above-mentioned prior art can have following effect: because this sensor does not contact measured medium, realized indirect measurement, made the resolution height, the degree of accuracy height.

Fig. 1 is the utility model complete section structural drawing;

Fig. 2 is a potentiometer 9 and microcomputer interface connection layout on Fig. 1;

Fig. 3 is that Large Gear Shaft During 1 connects floating ball rod (16,15) office cut-away view in the tested container by coupling shaft 2 on Fig. 1;

Fig. 4 is that pinion shaft 6 is connected office's cut-away view with potentiometer 9 on Fig. 1;

Fig. 5 is Large Gear Shaft During 1 and an annex map thereof on Fig. 1.

The utility model is described in further detail below in conjunction with accompanying drawing:

By shown in Figure 1, one housing is divided into two chambers (14,15), the large and small gear that is meshed (4,7) is adorned in lining, chamber (14), the number of teeth of bull wheel is 136, the size gear ratio is 8:1, Large Gear Shaft During (1) is passed shell wall and is linked to each other with floating ball rod (16,17) in the tested container by coupling shaft (2), pinion shaft (6) penetrates the linear potentiometer (9) of dividing plate and embedding and goes up the axle assembling, in the insertion chamber microcomputer interface (12,13) is being arranged on the shell wall of potentiometer side, and potentiometer (9) is to be connected in parallel on the microcomputer interface circuit, as shown in Figure 2.

Go up this and can make six wall rectangular case, the wall thickness of housing will reach explosion-proof thickness, in order to process middle part and top (5) that housing will be divided into bottom (10) band dividing plate (3), forms two chambeies (14,15), after but each phase setting-in is joined, use screw (11,18) in conjunction with a housing.Gear shaft (1) can pass through transmission shaft (2) and be connected with ball float (16) connecting rod (17) form right angle, connecting rod rotates around axle (2), its corner can be 0-15 °, two gear moduluses can be 0.5, and the gear wheel reference diameter is 66mm, and the number of teeth of pinion wheel is 17, reference diameter is 8.5mm, the corner of gear wheel is identical with the variation of the corner of floating ball rod, and the corner of pinion wheel is identical with the corner of potentiometer, and the potentiometer both end voltage can be made as 0-5V.Can put on the tested container shell by member (8).

Claims

1, a kind of gear drive liquid level sensor, it is characterized in that: a housing is divided into two chambers (14,15), the large and small gear that is meshed (4,7) is adorned in lining, chamber (14), the number of teeth of bull wheel is 136, the size gear ratio is 8: 1, big wheel shaft (1) passes shell wall and is connected with floating ball rod in the tested container, pinion shaft (6) is worn linear potentiometer (9) assembling of dividing plate and embedding, inserting lining, chamber (15) on the shell wall of dress potentiometer side has microcomputer interface (12,13), and potentiometer is connected in parallel on interface (12, the 13) circuit.

2, sensor as claimed in claim 1 is characterized in that: the wall thickness of housing will reach explosion-proof thickness.

3, sensor as claimed in claim 1 is characterized in that: Large Gear Shaft During (1) can be passed through transmission shaft (2) and be connected with the floating ball rod form right angle.