CN2059502U

CN2059502U - Rotor measuring balance

Info

Publication number: CN2059502U
Application number: CN89219398U
Authority: CN
Inventors: 易乃惠; 周坚律; 沈根溪; 张惠良; 徐顺明; 郑京肖; 陆秉权; 魏辉
Original assignee: Jinhua electronic instrument factory; China Building Materials Academy CBMA
Current assignee: Jinhua electronic instrument factory; China Building Materials Academy CBMA
Priority date: 1989-11-11
Filing date: 1989-11-11
Publication date: 1990-07-18

Abstract

The utility model relates to a novelrotor measuring balance, which can do dynamic continuous measuring to granular material, and the structure characteristics are that the two fulcrums of the measuring balance are arranged on the both sides of an annular disk shape balance body and passes through the connecting lines of the center of annular disks. A feed inlet and a feed outlet are arranged on the connecting line. The utility model has the advantages that the structure is not sensitive to the gravity deviation which is caused by the impact of the material or the conglomeration state of the material. The weighing errors of the integral system are reduced. The weighing range ranges from 10 kg per hour to-200 tons per hour. The weighing precision ranges from +-0.5 to 1.0%.

Description

Rotor measuring balance

The utility model is a kind of novel rotor weigher that powder and granule shape material is carried out dynamic continuous measure.

Domestic and international existing belt scale, the charging aperture of impulse flow meter and spiral electronic scales is located near the fulcrum, but discharging opening is away from fulcrum, and materials flow impulsive force or material are heaped state variation and are caused centre-of gravity shift easily, have influenced the measuring accuracy of scale; Its structure also is unsuitable for the occasion that strength is carried, and the imbalance of air-flow easily causes error in dipping, present used square crossing formula cross-spring sheet supporting device, and unbalance stress can not support the rotor scale of big flow; West Germany Pfister company manufactured experimently into a kind of rotor weigher in 1987, be mainly used in coal powder metering, measures range is the highest just to reach 25 tons/hour, measuring accuracy ± 1%, structurally, the pivot of weighing adopts the suspension type bearing arrangement, dirt exclusion capabilities is poor, adopts belt pulley and worm and gear double reduction again, and dragging motor is installed in fulcrum one side, opposite side will be used counterweight balance, and the deadweight of scale body is obviously increased.

Task of the present utility model is at a kind of rotor weigher that is suitable for the powder and granule shape material continuous measurement of the deficiencies in the prior art part design, and it is wide to have a measures range, the characteristics that measuring accuracy is high.

The utility model is mainly by charging aperture, garden dish type scale body, rotor, fulcrum (2), drop-leg, discharging opening, tachogenerator, load sensor is formed, two fulcrums are arranged on the both sides of garden dish type scale body, and on the line by garden disk center, the feed inlet and outlet of weigher also is arranged on this line, this line is with garden dish type scale body dimidiation, and rotor rotates counterclockwise 180 °.Material is from the charging aperture to the discharging opening, and load sensor is arranged on the perpendicular line of two fulcrum lines and by the force transmission mechanism that is installed on the scale body and links to each other with the scale body, and tachogenerator is installed on the dragging motor; A drop-leg is installed between charging aperture and discharging opening;

Below in conjunction with accompanying drawing the utility model is described in detail:

Accompanying drawing 1 is a rotor weigher front elevation

Accompanying drawing 2 is a rotor weigher side view

Accompanying drawing 3 is a rotor weigher vertical view

The weigher A that accompanying drawing 4 is installed at an angle for level is to upward view

Weigher front elevation that accompanying drawing 5 is installed at an angle for level and B-B are to partial view

Accompanying drawing 6 is a pressure-bearing type cross-spring sheet fulcrum

Accompanying drawing 7 is a suspension type cross-spring sheet fulcrum

Accompanying drawing 8 is the supporting of square crossing cross-spring sheet

The elastic sheet sealing adaptor of accompanying drawing 9 charging apertures

The elastic sheet sealing adaptor of accompanying drawing 10 discharging openings

From Fig. 1,2,3 novel rotor weighers by charging aperture 1, charging aperture elastomeric joint 2, garden dish type scale body 3 rotors (vane type or hopper group) 4, fulcrum 5, drop-leg 6, discharging opening elastomeric joint 7, discharging opening 8, reductor 9, dragging motor 10, tachogenerator 11 is demarcated with counterweight 12, load sensor (pull-type) 13, scale frame 14 constitutes.Fulcrum (Fig. 6, Fig. 7) is by bearing 15, journal stirrup 16, and cross-spring sheet A group 17, cross-spring sheet B group 18 constitutes; Two fulcrums of rotor weigher are arranged on the both sides of garden dish type scale body 3, on the line by garden disk center, the charging aperture 1 of weigher and discharging opening 8 also are arranged on this line, this line is with garden dish type scale body 3 dimidiations, rotor 4 rotates counterclockwise 180 ° of angles, material is from charging aperture 1 to discharging opening 8, cause the imbalance of Weighing mechanism because of weight of material, be sent on the load sensor 13 by the force transmission mechanism that is installed on the scale body, produce corresponding electric signal, be installed in the tachogenerator 11 on the dragging motor simultaneously, detect the rotary speed signal of rotor, this two signal imports simultaneously that computer controller is handled and computing, and measurement result statistics have shown and record automatically.

A drop-leg 6 is installed, to adapt to the metering of strength convey materials between feed inlet and outlet.

Two fulcrums 5 are a kind of novel cross-spring sheet mechanisms, and two kinds of pressure-bearing type and suspension types (Fig. 6, Fig. 7) are arranged; (1) pressure-bearing type (Fig. 6) has two groups of spring leafs of A, B, and A group spring leaf is installed from the horizontal by 15 °～45, and B group spring leaf is installed from the horizontal by 75 °～45, and is orthogonal to guarantee two groups of spring leafs, stressed even; (2) suspension type (Fig. 7) changes the bearing of cross-spring sheet mechanism into pull-type bearing, hangs on the scale frame, and journal stirrup is fixed on the scale body, A, and angle is 45 ° within two groups of spring leafs of B and the horizontal direction, makes the scale body be in suspension status.

Garden disc type scale body 3 can be 0～80 ° of angle with level to be installed, to adapt to different installation occasions.

The structure of rotor can be vane type or hopper group formula (Fig. 1,2,3,4,5), when metering normal temperature granular material, the garden dish is level and installs, the rotor blade wheel structure, granular or during when metering up to 400 ℃ of materials, according to material angle of repose difference, the garden dish is installed at an angle with level, rotor adopts the hopper group, material is unlikely in rotation to be overflowed from hopper prematurely in order to make, the hopper section is designed to polyline shaped, just begins in the time of so just making material turn to discharging opening to overflow and drain, and has guaranteed the accuracy of metering.

Embodiment: not before the blanking, make disk shaped scale body both sides weight balancing by the machine zero device, just begin blanking, 180 ° from charging aperture to the discharging opening rotor rotation, material falls from discharging opening, measure signal by load sensor and tachogenerator, the input computer, computer controller carries out corresponding computing to two signals, calculates material instantaneous delivery and cumulative amount, carry out numeral demonstration or printing, reach the dynamic continuous measure purpose.

The advantage of the utility model rotor weigher is as follows:

(1) charging aperture and discharging opening all are arranged on the line of two fulcrums and garden disk center, and this kind structure can significantly reduce impulsive force that material produces to the impact of measuring accuracy in running, and its measuring accuracy is ± 0.5～1.0%.

(2) drop-leg is installed between its charging aperture and discharging opening, is made most of air-flow arrive discharging opening from isocon, gas passes through simultaneously from two fulcrums, and pressure differential is little, to the essentially no impact of measuring accuracy, is particularly suitable for the occasion that strength is carried.

(3) in the prior art, the supporting of square crossing type (Fig. 8) cross-spring sheet, two groups of spring leaf unbalance stress, fail its potentiality of fine performance, the utility model design has pressure-bearing type and two kinds of support patterns of suspension type, obviously improved the fulcrum bearing capacity, its measures range is also corresponding to be widened, and its measurement range is 10kg/ hour～200 tons/hour.

(4) this equipment rotor form can be vane type or hopper group formula (Fig. 1,2,3,4,5), and dish type scale body installation site, garden can be 0 °～80 ° angles with level, adapting to different fields of employment, and can be used for the metering of different material (powdery or granular).

(5) the utility model is when feed inlet and outlet connects with garden dish type scale intracoelomic cavity, and (Fig. 9 Figure 10), in conjunction with closely, makes the rotor scale be in sealing state, has avoided dust from flying to have designed the board-like sealing adaptor of a kind of Thin Elastic.

Claims

1, a kind of powder and granule shape material is carried out the novel rotor weigher of dynamic continuous measure, it is characterized in that, weigher is mainly by charging aperture, garden dish type scale body, and rotor, fulcrum (2), drop-leg, discharging opening, tachogenerator, load sensor is formed; Two fulcrums of weigher are arranged on the both sides of garden dish type scale body, and on the line by garden disk center, the feed inlet and outlet of weigher also is arranged on this line, and this line is with garden dish type scale body dimidiation, and rotor rotates counterclockwise; Load sensor is arranged on the perpendicular line of above-mentioned line (disk center makes vertical line by the garden), and links to each other with the scale body by force transmission mechanism, and tachogenerator is installed on the dragging motor; A drop-leg is installed between charging aperture and discharging opening;

2, according to claim 1 described novel rotor weigher, the fulcrum that it is characterized in that described weigher is by bearing, journal stirrup, and A organizes spring leaf, and B group spring leaf is formed; Can be divided into two kinds of pressure-bearing type and suspension types from the installation of bearing:

(1) pressure-bearing type cross-spring sheet mechanism, A group spring leaf and horizontal direction are 15 °～45 installs, and B group spring leaf and horizontal direction angle are 75 °～45 °;

(2) suspension type cross-spring sheet mechanism, bearing is hung on the scale frame, and journal stirrup is fixed on the scale body, is 45 ° cross-spring sheet binding with one group with level between two groups of bearings;

3, the rotor weigher according to claim 1 is characterized in that described garden disc type scale body can be 0 °～80 ° angles with level and install;

4, the rotor weigher according to claim 1 is characterized in that described rotor structure, and two kinds of vane type and hopper group formulas are arranged;

5, the rotor weigher according to claim 1 is characterized in that described charging aperture and discharging opening and garden disc type scale intracoelomic cavity connect the connection place, adopts the elastic sheet sealing adaptor.