JP3122853B2 - Pourable material weighing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to U.S. Pat.
An apparatus for weighing pourable material, such as the apparatus described in US Pat.

[0002]

2. Description of the Related Art The above-mentioned U.S. Pat. No. 4,878,086 (hereinafter referred to as "the above-mentioned patent") is filled through a plurality of pockets of a rotor arranged in a housing and rotatable about a substantially vertical axis through an inlet. An apparatus for continuously weighing pourable material discharged by the supply of pressurized air via a discharge outlet which is displaced in the direction of rotation of the rotor with respect to the injection inlet is disclosed. The housing is rotatable about a substantially horizontal axis and is coupled to a force measuring device located away from that axis. An injection inlet,
Elastic coupling members are provided at the discharge outlets, respectively. The horizontal axis passes through the center of the elastic coupling member so that the force generated by the torsion of the measuring device when a load is applied does not affect the measurement.

[0003] If such a measuring device is used, relatively high accuracy will be obtained. However, in the embodiment described in the above-mentioned patent, particularly the configuration shown in Figs. In essence, the elastic coupling means as a compensating device is arranged on the horizontal rotation shaft, so that the manner in which the pneumatic feed duct is connected at the discharge portion is limited.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pourable material weighing device which further enhances the connection of the pneumatic feeding system while maintaining high accuracy.

[0005] Another object of the present invention is to use pressurized air supplied to deliver measured material to clean the interior of the rotor of the device.

It is yet another object of the present invention to provide a pourable material weighing device having a configuration that facilitates assembly and maintenance.

[0007]

SUMMARY OF THE INVENTION A measuring device according to the above aspects includes the features of claims 1, 2 and 3.

A further improvement of the device according to the invention is as follows.

(1) The first axis extends into a first plane passing through a center of gravity of a unit including the housing and an element mounted thereon, and the center of gravity is provided when the device is in an operating position. 2. The apparatus of claim 1, wherein a normal from to the first axis extends into a second plane perpendicular to the second axis.

(2) A pressurized fluid supply means coupled to the housing via another elastic coupling means on a side opposite to the discharge means, wherein the first shaft is connected to the another elastic coupling means. Apparatus according to claim 1, also passing through the center of the means.

(3) The pressurized fluid supply means is coupled to an area of the housing facing a central interior space of the rotor means, and an outlet of the housing opposite the pressurized fluid supply means. The apparatus according to (2), further comprising a coupling means provided between the housing and an inlet of the housing on a side opposite to the discharge means.

(4) The apparatus according to (3), wherein said elastic coupling means included in said discharge means and said another elastic coupling means are arranged in said housing on the side opposite to said injection means.

5. The apparatus of claim 1, wherein in the operating position of the apparatus, the second axis extends in a substantially vertical direction.

6. The apparatus of claim 1, wherein in the operating position of the apparatus, the second axis extends in a substantially horizontal direction.

(7) The apparatus according to the above (6), wherein the injection means is connected to a peripheral wall of the housing, and the pocket is radially open.

(8) The pressurized fluid supply means is coupled to an area of the housing facing a central interior space of the rotor means, and an outlet of the housing opposite the pressurized fluid supply means. 3. The apparatus of claim 2 including coupling means provided between the housing and an inlet of the housing opposite the discharge means.

(9) The apparatus of claim 2, wherein said housing is mounted on one side of said support means.

(10) The discharge means is coupled to the housing on an opposite side with respect to the injection means.
The described device.

(11) The first axis extends into a first plane passing through a center of gravity of a unit including the housing and an element mounted thereon, and the center of gravity is provided when the apparatus is in an operating position. 4. Apparatus according to claim 3, wherein a perpendicular from the first axis to the first axis extends into a second plane perpendicular to the second axis.

(12) The apparatus further comprises pressurized fluid supply means coupled to the housing via another elastic coupling means on the side opposite to the discharge means, wherein the first shaft is connected to the another elastic coupling means. Apparatus according to claim 3, which also passes through the center of the means.

(13) The pressurized fluid supply means is coupled to an area of the housing facing a central interior space of the rotor means, and an outlet of the housing opposite the pressurized fluid supply means. The apparatus according to (12), further comprising coupling means provided between the housing and an inlet of the housing on a side opposite to the discharge means.

(14) The above (1), wherein the elastic coupling means included in the discharge means and the another elastic coupling means are arranged in the housing on the side opposite to the injection means.
Device according to 3).

(15) The apparatus according to claim 3, wherein said first axis is inclined with respect to a horizontal line.

(16) The apparatus according to claim 1, wherein said first axis is inclined with respect to a horizontal line. The use of a tilted pivot allows the compensating device to be located on the upper and lower sides of the housing, and the pivot to pass through the center of all compensating devices.

If the housing is supported on one side of the frame,
It is easy to perform the work of assembling and maintaining the device.

Other features and advantages of the device according to the invention will be inferred from the following description with reference to the drawings.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Since the above patent describes a weight measuring device which operates continuously by pneumatic pressure, reference should be made to this patent fully, and only those changes which are essential to the present invention will be described in more detail below. explain.

FIG. 1 to FIG. 3 show the basic configuration of the weight measuring device 10. A rotor 14 arranged in a cylindrical area of the housing 12 is rotated by a motor 13 about a substantially vertical axis A. A plurality of pockets 16 are arranged around a central internal space 19 of the rotor 14. The pockets pass under the pouring site, in particular under the pouring inlet 17 where the material is supplied from the bottle 11. In the region of the pocket 16 on the bottom side of the housing 12 there is provided a discharge outlet 18 at the discharge location, offset from the injection inlet in the circumferential direction, the outlet comprising an elbow pipe 26 and a feed duct 28. By the pressurized air supplied via the air inlet 15 towards the duct, the pourable material is blown out of the pocket 16 through the outlet 18.

As is known from the above patent, the device 1
0 is suspended asymmetrically in the frame 50 (see FIGS. 7 and 9). The frame is rotatable about an axis II. A force measuring device 30 coupled to the device 10 at a distance from the axis II measures the mass of the pourable material filling the pocket 16 between the inlet 17 and the outlet 18. I do. Given that the device 10 is of considerable weight, high accuracy will only be obtained if the effects of the extra force caused by the slight pivotal movement of the device 10 about the axis II are prevented. . This is because the inlet 17, the air inlet 15 and the exhaust duct 26/2
This is done by means of elastic coupling members as compensators 20, 22 and 24 which are arranged corresponding to FIG. According to the teachings of the above-mentioned patents, when the device 10 is pivoted, the axis II is substantially horizontally compensated so that the torsional forces caused by it are almost completely eliminated during the measurement. Devices 20, 22
And 24 extend through the center.

The embodiment shown in FIGS. 1 to 3 differs from the known device according to FIGS.
Housing 12 so as to improve the discharge of air by gravity.
In that compressed air is supplied from above.

FIGS. 4 to 6 show a second embodiment of the present invention, in which pressurized air is supplied to the device 10 at the discharge location.
After being guided through the central interior space 19 via the inlet 40 instead of directly into the air inlet 15 via the elbow pipe 26 from the outlet 47 opposite the inlet 40 It is characterized by being sent. This has the advantage that under high pressure the interior space 19 is kept free of pourable material.
Otherwise, material may leak inward from pocket 16 and accumulate there.

The third embodiment according to FIGS. 7 and 8 takes advantage of the particular feature of the invention in that the connection to the discharge location can be made quite varied. Although the axis II in the embodiment of FIGS. 1 to 3 and FIGS. 4 to 6 extends horizontally, the axis II-II of the device 10 is not horizontal, and the pivot axis is The angle is such that it passes through the center of a compensator that can be located both above and below 12.

In the third embodiment of FIGS. 7 and 8, the compensator 46 is simply placed on the bottom side of the housing 12 so that the pivot axis II-II passing through the compensator 20 also passes through the center of the compensator 46. Is mounted at the position of the discharge outlet portion 18. In this embodiment, discharge to an outlet duct (not shown) by the action of gravity alone would be possible, as will be described in more detail in connection with FIGS.

It should be noted that the housing 12 of the device 10 is rotatably pivoted at both ends by arcuate support arms 12a, 12b with bearings mounted in a suitable manner to the frame 50 as illustrated and described in the above patent. Supported.
A particularly advantageous one-sided support of the housing 12 is described below with reference to FIG.

As shown in FIG. 8, also in this case, the device 1
0 is suspended at the force measuring device 30 away from the axis II-II. With respect to the direction of force introduction of the force measuring device 30, the division of the force component taking into account the tilt position of the axis II-II may be compensated by calibration or calculation.

With respect to the angle of inclination of the axis II-II with respect to the horizontal, this angle is determined by the height of the housing 12 and the horizontal separation between the axis of the inlet and the axis of the outlet and from 15 ° to 45 °. Range, especially 20 ° to 30 °
It should be noted that

FIG. 7 illustrates another feature of the apparatus of the present invention that is applicable to most of the described embodiments.

In this regard, frame 50 is typically
It should be noted that, due to the tight connection to the bin 11, any change in the vertical, especially lateral, load exerted by the bin 11 carries the risk of the frame 50 being slightly twisted. Thereby, the position of the rotatable shaft II-II may change slightly, which may have a considerable effect on the measurement result. According to the present invention, the housing 12 and the rotor 1
4 and a motor 13 and their associated gears, the center of gravity S of the unit being rotatable about the axis II-II.
Is disposed in a plane that includes axis II-II and extends perpendicularly (at a 90 ° angle) to the plane of the drawing in FIG. 7 to prevent such effects. In addition, axis II from the center of gravity
The perpendicular drawn at -II extends horizontally in its plane in the operating position of the device.

Furthermore, the direction of introduction of the force into the force measuring device 30 may be selected to be as perpendicular as possible with respect to this plane (see also FIGS. 15 and 16).

FIGS. 9 and 10 show a fourth embodiment of the device according to the invention, which combines the features of the previous two embodiments.

More specifically, the pressurized air is supplied from below to the internal space 19 (FIG. 6) through the compensating device 51, and further supplied to the air inlet 15 through the elbow pipe 26. 6) receives an air blast from above, the pourable material passes through the discharge outlet 18,
It is discharged to the feed duct 28 via the compensating device 53. Also in this case, the compensating device 20 and the compensating devices 51 and 53 are positioned on the inclined pivotable shaft II-II.

FIGS. 11 and 12 and FIGS. 13 and 14
Shows two embodiments of the measuring device 60 of the present invention, respectively, which are different from the embodiment of the above patent and the previous embodiment in that the rotor 14 of the device 60 rotates about a substantially horizontal axis B. They differ in that they do. Injection inlet 62
Is preferably located around, i.e., on the peripheral wall of the housing 12, and the pockets 56 of the rotor 14 will preferably be open radially.

Also in this case, the compressed air is supplied to the compensator 22.
And via the elbow pipe 64 to the air inlet 15, so that the discharge takes place under pneumatic action and the pourable material blown out of the pocket 56 is sent out via the elbow pipe 66 and the compensator 24. . In this embodiment, the measuring device 60 is suspended in a frame (not shown) similar to the frame 50 of FIG. 7 so as to be rotatable about an axis III-III, and the axis III-III is the same. Through the centers of the compensators 20, 22, and 24. The mass of the pourable material that the rotor carries between the inlet 62 and the outlet 18 is determined by the force measuring device 30 and the measuring device 60 is connected to the force measuring device by the axes III-I.
It is fixed away from II.

FIGS. 13 and 14 in which the fifth embodiment is modified.
In the sixth embodiment of the measuring device 60, the blowing of the internal space 19 (FIG. 6) of the rotor 14 passes through the compensating device 22, passes through the elbow pipe 84, and reaches the pressurized air inlet 82. And from the elbow pipe 86 via the discharge outlet 18, the elbow pipe 88 and the compensator 24. The axis III-III likewise passes through the centers of the compensators 20, 22, and 24.

FIGS. 15 and 16 show a weight measuring apparatus 70 according to a seventh embodiment, which is a simplified form as compared with the previous embodiment. The device may be used as a weighing sluice that operates without pneumatic feed. This allows
A member that is simpler than a member that connects elastically, that is,
In principle, it is possible to use force-free transition elements 92, 94 consisting of loosely fitting tube elements, for example 92a, 92b and the like.

If some degree of sealing is desired, FIG.
As indicated at 6, the transition portion may be covered by a flexible material 92 in the form of a hose or bellows.

Further, as shown in FIG. 16, although the pressure is lower than the previous case, the operation of emptying the rotor 14 may be improved by supplying air through the air inlet 99.

Also in this embodiment, FIGS.
, The axis II-II lies in a plane passing through the center of gravity of the unit consisting of the housing 12 and the motor 13 mounted on it, the element being rotatable about its axis, from which the axis II-II The perpendicular drawn at II extends horizontally in said plane in the operating position of the device.

FIGS. 17 and 18 show an eighth embodiment of the measuring device 80 according to the present invention. In this case, as a modification of the previous embodiment, the rotatable shaft II-II is mounted on the frame 97 and the housing It passes through bearings 91 and 93 arranged only on one side from 12. The axis II-II is preferably connected to the housing 12 by a single crank-shaped support arm 12a. Air is supplied to the compensator 22 and the S-shaped duct 9
5 and to the air inlet 15 of the housing 12 and again through the compensator 46. Rotatable shaft
II-II extends through a plane passing through the centers of the compensating devices 20, 22, 46 and through the center of gravity S of the unit of the device 80 which is rotatable about this axis II-II. S to axis II-
The perpendicular drawn at II extends horizontally.

Such a one-sided support has the advantage of making it easier to operate the measuring device for both assembly and maintenance.

As is evident from the above description, a pourable material weighing device has been disclosed that exhibits significant advantages in various respects over known devices. In this regard,
The essential features of the present invention are not limited to the application to the weighing device according to the above-mentioned patent, and the deterioration of the measurement result due to the undesired force generated at the connection between the device and the injection duct and the discharge duct should be eliminated. It should be noted that the invention is equally applicable to any other weighing device such as

[Brief description of the drawings]

FIG. 1 is a schematic front view of a first embodiment of the apparatus of the present invention.

FIG. 2 is a front view of the apparatus of FIG. 1 when it is turned 90 °.

FIG. 3 is a schematic plan view of a housing of the device of FIG. 1;

FIGS. 4 to 6 are views corresponding to FIGS. 1 to 3 in a second embodiment of the device of the present invention.

7 and 8 are views corresponding to FIGS. 1 and 2 in a third embodiment of the apparatus of the present invention.

9 and 10 show a fourth embodiment of the device according to the invention, FIG.
And a diagram corresponding to FIG.

11 and 12 are views corresponding to FIGS. 1 and 2 in a fifth embodiment of the device of the present invention.

13 and 14 are views corresponding to FIGS. 1 and 2 in a sixth embodiment of the device of the present invention.

15 and 16 are views corresponding to FIGS. 1 and 2 in a seventh embodiment of the device of the present invention.

17 and 18 are views corresponding to FIGS. 1 and 2 in an eighth embodiment of the device of the present invention.

[Explanation of symbols]

 10, 60, 80 Weight measuring device 11 Bin 12 Housing 13 Motor 14 Rotor 15, 82 Air inlet 16, 56 Pocket 17, 62 Injection inlet 18 Discharge outlet 19 Central internal space 20, 22, 24, 46, 51, 53 Compensation device 26, 64, 66, 84, 86, 88 Elbow pipe 28 Feed duct 30 Force measurement device 40, 99 Air inlet 47 Air outlet 50, 97 Frame A, B axis S center of gravity II, II-II, III-III Rotation axis

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-58-204325 (JP, A) Japanese Patent Publication No. 5-6854 (JP, B2) Japanese Utility Model Publication No. 5-25700 (JP, Y2) (58) Field (Int.Cl. ⁷ , DB name) G01G 11/00 G01G 17/04

Claims (3)

(57) [Claims] 1. An apparatus for continuously weighing a pourable material, comprising: support means; a housing rotatably mounted on said support means about a first axis; Rotor means arranged rotatably about two axes and having a plurality of pockets arranged therearound; injecting means coupled to the housing and supplying the pourable material into the pockets of the rotor means; Discharge means coupled to the housing on the opposite side of the injection means in a rotational direction of the rotor means with respect to the injection means, for receiving the pourable material and discharging it from the pocket; The first means is included in the injection means and the discharge means, and prevents transmission of force from the injection means and the discharge means to the housing; There elastic coupling means and which passes through the center; between the housing and the support means, the weight measuring apparatus characterized by comprising a force measuring means for coupling away from said first axis. 2. An apparatus for continuously weighing a pourable material, comprising: support means; a housing mounted on said support means so as to be pivotable about a first axis; Rotor means arranged rotatably about two axes and having a plurality of pockets arranged therearound; injecting means coupled to the housing and supplying the pourable material into the pockets of the rotor means; Discharge means coupled to the housing on the opposite side of the injection means in a rotational direction of the rotor means with respect to the injection means, for receiving the pourable material and discharging it from the pocket; The first means is included in the injection means and the discharge means, and prevents transmission of force from the injection means and the discharge means to the housing; And elastic coupling means passing through the center; coupled to the housing via another elastic coupling means so as to face the discharge means, and the same of the housing with the elastic coupling means of the injection means and the discharge means. Pressurized fluid supply means disposed on the side of the first fluid passage, the first axis passing through the center;
And a force measuring means that is coupled away from the axis of the weight measuring device. 3. An apparatus for continuously weighing a pourable material, comprising: support means; a housing mounted on one side of said support means so as to be pivotable about a first axis; Rotor means arranged to be rotatable about a second axis and having a plurality of pockets arranged therearound; coupled to the housing and supplying the pourable material to the pockets of the rotor means. Injection means; and discharge means coupled to the housing in a rotational direction of the rotor means with respect to the injection means for receiving the pourable material and discharging it from the pocket; the injection means and the discharge means. Wherein the first shaft passes through the center to prevent transmission of force from the injection means and the discharge means to the housing. Resilient coupling means and; between the housing and the support means, the weight measuring apparatus characterized by comprising a force measuring means for coupling away from said first axis.