CN2227327Y

CN2227327Y - Liquid level transmission apparatus

Info

Publication number: CN2227327Y
Application number: CN 95230455
Authority: CN
Inventors: 何运熙; 徐振起; 张军; 金荣贵; 唐美凤; 历建荣
Original assignee: AUTOMATION INSTRUMENT INST DLIAN NO INSTRUMENT AND METER PLANT
Current assignee: AUTOMATION INSTRUMENT INST DLIAN NO INSTRUMENT AND METER PLANT
Priority date: 1995-03-07
Filing date: 1995-03-07
Publication date: 1996-05-15
Anticipated expiration: 2005-03-07

Abstract

The utility model discloses a liquid level transmission apparatus, which is mainly used for liquid level survey and control of liquid storing containers in petrochemical industry. The utility model is used by matching with local instrumentation such as a surface type steel band level meter, the mechanical angle of rotation of local instrumentation can be changed into electric signals, and transmitted to a microcomputer or a display instrument for display and control. The utility model is provided with a casing 3 whose inner part is provided with a gearing device, and a position sensor is connected with the gearing device. The end of an input shaft 2 for driving the gearing device is arranged outside the casing 3, and is fixedly connected with a shifting shaft 1. The utility model has the advantages of simple structure, high sensitivity, reliability, etc.

Description

Fluid level transmitter

The utility model relates to a kind of fluid level transmitter, mainly be level gauging and the control that is exclusively used in the petroleum chemical industry liquid storage container, field instruments such as it and float-type level gauge of steel band are supporting, and the mechanical corner of field instrument is become electric signal, give microcomputer or Displaying Meter and show and control.

Mostly be the code-disc electric brush type at existing fluid level transmitter, this transmitter is to utilize relative motion and excellent contact between code-disc and the brush to come transmission of electric signals, when making moist between the two or being corroded and occur the loose contact phenomenon during surface oxidation, when contacting tension between the two, not only make very quick-wearing of surface in contact, mechanical rotation moment is strengthened, thereby influence the measuring accuracy and the sensitivity of a whole set of instrument.Therefore existing code-disc electric brush type transmitter has service condition and requires shortcomings such as high, that the life-span is short, error is big.

The purpose of this utility model provide a kind of all can operate as normal under any condition, highly sensitive fluid level transmitter.

Technical solution of the present utility model is: a kind of fluid level transmitter, it is characterized in that: be provided with housing 3, in housing 3 gearing is housed, is connected to position transducer with gearing, the termination of the input shaft 2 that drive transmission rotates is positioned at outside the housing 3 and is connected with dial axis 1.

Described position transducer is rotary transformer or selsyn.

Described gearing is a cogwheel gearing.

The utility model compared with prior art, have that this body structure of transmitter is simplified greatly, electric elements are few, corrosion-resistant, advantage such as humidity resistance is good, thereby prolonged serviceable life greatly, improved the reliability of instrument, owing to got rid of structures such as code-disc brush, driving torque is reduced, go slick, few to supporting with it float level gauge of steel band influence, system accuracy and sensitivity are improved.

Below in conjunction with the drawings and the specific embodiments the utility model is further described:

Fig. 1 is the utility model embodiment structural representation;

Fig. 2 is the utility model and the supporting structural drawing of float-type steel band table shown in Figure 1.

As shown in Figure 1: 3 is housing, and housing 3 is a separable structure, about O-ring seal 6 is housed between two housings, both adopt pressing plate 11 and screw 12 affixed.Be fixed with base plate 7 at housing 3 inner bolts, be furnished with cover plate 8 mutually with base plate 7, the center bearing is connected with main shaft 15, and

output shaft

16,17 also is housed between base plate 7 and the cover plate 8, is gear drive between main shaft 15 and the output shaft 16, and its ratio of gear is 1: 1.And output shaft 17 drives by output shaft 16, between be gear drive, its ratio of gear is 56: 1.

Output shaft

16,17 joins with position transducer 9,10 respectively, and described position transducer is rotary transformer or selsyn, 28XZ10～5 type rotary transformers of selecting for use Shanghai micromotor factory to produce in the present embodiment.Be fixed with shaft coupling 5 in the termination of main shaft 15, rotating input shaft 2 also is housed on the housing 3, the shaft coupling 4 (referring to Fig. 1) that is complementary with shaft coupling 5 is equipped with in the termination of input shaft 2, and the external end head of input shaft 2 is connected with dial 18, is fixed with dial axis 1 on the dial 18.Dial 18 place's housings 3 are provided with flange 14.Go back screw thread in the bottom of housing 3 and be connected to terminal box 13.

Position transducer 9,10 joins by terminal box 13 and microcomputer or display instrument.

Principle of work: as shown in Figure 2: this fluid level transmitter is loaded on the float-type level gauge of steel band 19 supporting with it, dial axis 1 on the transmitter inserts the cross socket of float-type level gauge of steel band output dial, aim at seam and flange connecting hole simultaneously, fastening with bolt and nut then.Float 20 on the float-type level gauge of steel band 19 swims in the liquid storage container 22, when liquid level changes in the container, the dials that drive in the liquid level gauges 19 by float 20, the steel band of walking around guide wheel 23 that is connected with float 20 21 rotate, stir dial axis 1 again input shaft 2 and main shaft 15 are rotated, rotate by

output shaft

16,17 activation point sensors 9,10 at last.Position transducer 9,10 becomes the mechanical corner of float-type level gauge of steel band into corresponding 400HZ modulation signal, and the single-chip microcomputer or the microcomputer that send secondary instrument to carry out digital operation, to show liquid level.

Claims

1, a kind of fluid level transmitter is characterized in that: be provided with housing [3], in housing [3] gearing be housed, be connected to position transducer with gearing, the termination of the input shaft [2] that drive transmission rotates is positioned at outside the housing [3] and is connected with dial axis [1].

2, fluid level transmitter according to claim 1 is characterized in that: described position transducer is rotary transformer or selsyn.

3, fluid level transmitter according to claim 1 and 2 is characterized in that: described gearing is a cogwheel gearing.