CN2419585Y - Improved vibrating feeding balancer - Google Patents

Abstract

The utility model relates to a vibrating feeding balance in a feeding weighing device. A vibration exciter is connected to a feeding groove. One end of a gravity sensor suspended above the feeding groove is mutually connected with the outer side of the feeding tank adjacent to a discharge port; the gravity sensor and the vibration exciter are connected with a signal processor. Both sides of the feeding groove positioned a feed port are supported with a damping pad; the supporting center of the damping pad is coincident with the center of a silo pressure resultant force acted on the groove bottom of the feeding groove. The utility model makes silo pressure directly born by the damping pad; the influence of the silo pressure on the gravity sensor is effectively eliminated. Consequently, the metering precision of the utility model is ensured.

Description

Improved vibrating feed scale

The utility model relates to a kind of vibrating feed scale in the feed metering outfit.

During for the realization vibrating feed material of being carried is measured, existing vibrating feed scale has been set up gravity sensor, speed pickup and signal processor on the basis of oscillating feeder, by gravity sensor supporting feeder trough, speed pickup is attached on the feeder trough, when carrying out vibrating feed, record each by gravity sensor and constantly send by signal processor processes, calculating, draw the integrated flow of institute's convey materials to the electric signal of weight of material on the groove and by the electric signal that speed pickup records material mean flow rate in the feeder trough.In the design proposal of existing vibrating feed scale, ignored of the following influence of the interior material of feed bin: when the material in the feed bin constantly enters the charging aperture of feeder trough to gravity sensor, because the kinetic energy impact meeting of material forms certain pressure (claiming the storehouse to press again) to feeder trough, therefore, to record weight signal be weight of material signal and storehouse pressure signal sum to gravity sensor.Like this, signal processor records the material integrated flow that calculated signals goes out according to gravity sensor just bigger error, and the integrated flow of material is always less than result of calculation.

The purpose of this utility model is improved the structure of existing vibrating feed scale, provides a kind of storehouse of eliminating to press the vibrating feed scale that impacts to gravity sensor.

For achieving the above object, the scheme that the utility model adopts is: vibrator is connected on the feeder trough, an end that hangs on the gravity sensor of feeder trough top links to each other with the outside of feeder trough near discharging opening, gravity sensor and vibrator connect signal processor, the two-side supporting that feeder trough is positioned at charging aperture has cushion blocking, and the supporting center of cushion blocking overlaps with pressure force center, storehouse on acting on the feeder trough bottom land.

By such scheme as seen, cushion blocking at feeder trough charging aperture two-side supporting feeder trough, its supporting center overlaps with pressure force center, storehouse on acting on the feeder trough bottom land, like this, entering material in the feeder trough pressure at the bottom of to feeder trough by feed bin is directly born by cushion blocking, effectively eliminated of the influence of storehouse pressure, thereby measuring accuracy of the present utility model is guaranteed gravity sensor.

Description of drawings:

Fig. 1, be the structural representation of the utility model one embodiment;

The A-A cut-open view of Fig. 2, Fig. 1.

The utility model is described in further detail below in conjunction with embodiment and accompanying drawing thereof.

Referring to Fig. 1, vibrator 5 adopts existing commercially available prod, and vibrator 5 is fixedlyed connected with 3 of feeder troughs, and the upper end of gravity sensor 8 is connected with fixture, and the lower end is connected with the outside of feeder trough 3 near discharging opening by a spring 7.Cushion blocking 4 is bearing in the both sides of feeder trough 3 charging apertures 2, and cushion blocking 4 can be rubber blanket or spring, and a speed pickup 6 is housed in the outside of feeder trough 3.Among Fig. 1, gravity sensor 8, vibrator 5 and speed pickup 6 all connect signal processor.Be connected by flexible pipe 10 between the charging aperture 2 of the discharge end of feed bin 1 and feeder trough 3.

Referring to Fig. 2, basal seat area was pressed in the storehouse of feeder trough 3 bottom lands when the shadow region of feeder trough 3 charging apertures institute projection was charging, by calculating, B point in this zone is the action center of storehouse pressure force, then this center should overlap with the supporting center that two cushion blockings 4 form, and is born by cushion blocking 4 fully to guarantee that the storehouse is pressed.

During the work of this vibration feed weigher, vibrator 5 vibrations, the material that is entered feeder trough 3 by feed bin 1 is constantly sent from the discharging opening of feeder trough.In the vibrating transportation material, record the electric signal of weight of material in the feeder trough 3 by gravity sensor 8, record the electric signal of material flow in the feeder trough by speed pickup 6.After above-mentioned two electric signal that record are delivered to signal processor 9 and handle, can draw each weight Fi of material in feeder trough constantly, and the mean flow rate Vi of the material by feeder trough 3; With the Fi of gained and Vi by signal processor by formula: $W=K\underset{i=0}{\overset{n}{\mathrm{\Σ}}}\mathrm{Fi}\·\mathrm{Vi}$ Calculate, can draw the cumulative weight of material.In the following formula, W is an integrated flow, and K is the weighing coefficient.In whole feeding weighing process, the material that flows out in the feed bin 1 is directly born by cushion blocking 4 pressure of feeder trough 3, and this pressure is little of ignoring to the influence of gravity sensor 8.

In addition, the speed pickup 6 on feeder trough 3 outsides also can save.

If without speed pickup 6, the voltage signal change that signal processor 9 can be exported to vibrator 5 is handled by signal processor 9 after signal digital-to-analogue conversion process, can obtain the measured material flow signal of speed pickup equally.But the reliability of this scheme is not good, because once the job stability of vibrator 5 is not when good, the variation of measured material flow value of electrical signals is bigger, thereby causes measurement deviation bigger.Therefore, at feeder trough 3 outside installation rate sensors 6, can guarantee the functional reliability of this vibration feed weigher.

Claims (2)

1, improved vibrating feed scale, vibrator (5) is connected on the feeder trough (3), an end that hangs on the gravity sensor (8) of feeder trough (3) top links to each other with the outside of feeder trough (3) near discharging opening, gravity sensor (8) and vibrator (5) connect signal processor (9), it is characterized in that: the two-side supporting that feeder trough (3) is positioned at charging aperture (2) has cushion blocking (4), and the supporting center of cushion blocking (4) overlaps with pressure force center, storehouse on acting on feeder trough (3) bottom land.

2, vibrating feed scale according to claim 1 is characterized in that: a speed pickup (6) is housed on the outer wall of feeder trough (3), and this speed pickup (6) connects signal processor (9).

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