CN2044066U - Electronic belt balance - Google Patents

Abstract

The utility model discloses an electronic belt balance which can continuously convey the powder material. The electronic belt balance comprises a frame style belt conveyer and an electronic metering control system. Weighing levers are hanged on a supporting base by cross spring tabs and lever cross beams, the supporting feet of the belt conveyer are respectively hanged on the key point ends of the two weighing levers by a spring plate hanging device, the power point ends of the two weighing levers are connected with each other by a hinging device, and a load sensor is positioned under a balance arm. When the electronic belt balance is used, the continuous operation and intermittent metering can be realized, the continuous operation and continuous metering can also be realized at the same time, the electronic belt balance is not effected by the distribution uniformity degree of the material, the four-corner error does not appear, and the high metering accuracy and proportioning accuracy can be realized.

Description

Electronic belt balance

The utility model relates to the belted electronic balance of continuous conveying bulk material.

The belted electronic balance that uses in China's commercial production has several types at present, but all having measuring accuracy is difficult for guaranteeing, complex structure and other problems, Chinese patent discloses a kind of system controlled by computer double-cantilever belt weigher, the patent No. 86207515, this belt conveyer scale comes down to the frame-type band conveyor, be suspended on two weighing levers in the scale body by erecting by overhang, two to four load sensors are set under two weighing levers, export electric signal to the electrometer amount control system by load sensor, therefore this machine can not be subjected to the influence that material impact and skewness and belt transporting velocity change, have higher measuring accuracy and distributing precision, automaticity is higher, but because this machine has adopted two to four load sensors to gather the loading signal of four points respectively, and the characteristic of each load sensor has nothing in common with each other, even the sensor of same model specification, its characteristic can not be in full accord, this just requires configuration compensation and match circuit, because link is many, and influence each other, bring difficulty for the adjustment work of scale, in fact also form the position error in the weighing process.Owing to used the double-pole mouth structure in the erecting by overhang of this machine, in use easily cause edge of a knife wearing and tearing, influence measuring accuracy.

The purpose of this utility model provides a kind of position error that do not have, belted electronic balance simple in structure.

Main points of the present utility model are, band conveyor leg and weighing lever emphasis end are provided with latch plate and hang, thus band conveyor is suspended on two weighing levers, the force end of two weighing levers is hinged by articulated mounting, constitute a system, mutual restriction, concerted action, be added to the loading component of two weighing lever emphasis ends by the band conveyor leg, finally can both concern at equal pace to be delivered on the load sensor.

Referring to structure principle chart shown in Figure 4, articulated mounting 38 is equivalent to one two power bar, two ends respectively with two weighing levers 39,40 force end is hinged, jointed shaft can be a slidingtype, it also can be tumbling-type, the emphasis distance between center line of center line to two a weighing lever of the center line to two of an articulated mounting weighing balance pivot distance between center line and articulated mounting must equate, meanwhile, also must guarantee the emphasis axis and the fulcrum shaft line parallel of weighing lever, just can guarantee not produce the position error of loading, no matter loading 36 centers of gravity are positioned on which position of belt feeder, its weight can both be on the load sensor 37 below the weighing lever is reacted to the weighing lever balance arm of force 41.

Compared with the prior art the utility model has following advantage:

1, because the weighing lever is connected into system's mutual restriction by articulated mounting, eliminated the position error of scale body, improved the measuring accuracy of scale from structure.

2, owing to use latch plate to hang replacement double-pole mouth hanging structure, realized full elastic bearing, the link that reduces wear, the life-span of having improved scale.

3, because of only using a load sensor, thereby simplified greatly, made the adjustment work of scale simple and easy to do, and improved the reliability of total system work outside circuit function requirement.

Below in conjunction with accompanying drawing enforcement of the present utility model is elaborated:

Fig. 1 the utility model structural representation.

Fig. 2 articulated mounting structural representation (Figure 1A-A section).

Fig. 3 latch plate hanging structure figure.

Fig. 4 the utility model structure principle chart.

Is belt feeder referring to Fig. 1 more than joist steel (25), its critical piece has active roller (1), return idler (9), carrying roller (5), slewing rollers (7) and deceleration unit (3) etc., they are installed on the rigid frame that is made of vertical Beam (26) of channel-section steel and the horizontal Beam of joist steel (25) by bearing seat (10) or support (6) etc.Deceleration unit (3) selected technology advanced person, the planet cycloid pin gear reductor of compact conformation, it directly is fixed on two small size channel-section steels of cross-arm below the vertical Beam (26) of channel-section steel.Its power by small belt pulley (4), vee belt (2) and big belt pulley (27), reach active roller (1).

Below the belt feeder, outside the part leg (24) that uses when removing general assembly, all belong to the scale body.The scale body is by weighing lever (18) and weighing lever (19) articulated mounting, and the horizontal Beam of lever (15), cross-spring sheet (16), bearing (17), latch plate are hung (23), stone roller bar (20), balanced weight (21), the back of the body female (22) and the balance arm of force (11), load sensor (13), sensor stand (14), base parts such as (28) composition.

The cross-spring sheet comprises vertical reed and horizontal reed.Two groups of reeds are a cover, and totally two covers are screwed respectively and hang on end and the bearing (17) at the horizontal Beam of two levers (15).Double weighing lever (18) (19) then directly rides on the horizontal Beam of lever (15).Be processed with locating surface and location shoulder on the lever, the locating surface that they and mounting spring plate are hung (23) all once is installed on double-housing planer and processes, so dimensional accuracy and parallelism precision between the vertical reed of cross-spring sheet and latch plate are hung are all guaranteed.

Referring to Fig. 2, form articulated mounting by the splice bar (30) of pairing processing with by the jointed shaft (29) of two bearings (31) supporting up and down, two weighing levers are hinged together.Owing to adopted biserial double row self aligning ball bearings, can compensate automatically to the two weighing lever relative position deviations that cause by processing or installation with automatic adjustment function.Above-mentioned bearing can also use spherical bearing or oscillating bearing.

Weighing lever (18) left end is equipped with stone roller bar (20).The balanced weight of being made up of 7～8 circular steel plates (21) is through on the stone roller bar (20), and there is the locking back of the body female (22) both sides.At weighing lever (18) other end balance arm of force (11) is housed, its below is by base (28) upwards device sensor stand (14) and load sensor (13).The balance arm of force (11) is pressed on the contact of sensor (13) by the stainless steel platen (12) that is contained in below it.

More than than the structure of having introduced belt feeder and scale body in more detail.Introduce belt feeder below again and on the scale body, hang mounting structure.

Belt feeder is directly hung at four groups of latch plates that are pre-installed in two weighing lever emphasis ends by following four legs of joist steel (25) (24) and is hung on (23).In order to compensate the influence of the cumulative errors that is caused by processing and installation, the utility model is designed to have three degree of freedom adjustable function mechanism (seeing Fig. 3 for details) to this part.The riser and the latch plate of leg (24) are hung between (23) and directly are not screwed, and the mode that adopts double clamp to clamp, to guarantee lateral adjustments; Leg (24) is gone up to install with the screw via hole on the flat board and adopted slotted hole, and is vertically adjustable to guarantee; Processing screw hole and set screw (34) is housed and the back of the body female (33) on the link plate of suspending assembly (32) convex shoulder, adjustable to guarantee vertical.Owing to taked above-mentioned indemnifying measure, although hang calculating from four groups, vertically span reaches 1200 millimeters, and 660 millimeters of lateral separations can guarantee still during general assembly that four groups of latch plates hang evenly stressed and do not cause extra flexural deformation.This machine and electrometer amount control system are used, and can have continuous operation, and dosing is interrupted the function of weighing, and can reaches static error≤0.5%, the measuring accuracy of dynamic error≤1%.

Claims (3)

1, a kind of belted electronic balance, comprise the frame-type band conveyor, erecting by overhang, load sensor, the electrometer amount control system, the double weighing lever is hung on bearing by cross-spring sheet and lever crossbeam, it is characterized in that, the band conveyor leg is hung respectively on the emphasis end of two weighing levers by the board-like erecting by overhang of spring, and articulated mounting is linked together the force end of two weighing levers, and load sensor is arranged on below the balance arm of force.

2, belted electronic balance according to claim 1 is characterized in that, the biserial double row self aligning ball bearings are housed on the jointed shaft of articulated mounting.

3, belted electronic balance according to claim 1 is characterized in that, on the jointed shaft of articulated mounting spherical bearing is housed.

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