JP3382921B2 - Vibrating sieve device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention places a raw material such as sand or coal on a sieve, and imparts vibration to the raw material by vibrating the raw material by an unbalanced weight provided on a flywheel rotated by a drive motor. The present invention relates to a vibrating sieving device for separating raw materials.

[0002]

2. Description of the Related Art In factories, thermal power plants, etc., a vibrating type sieving device is used as a device for crushing or classifying raw materials such as sand, coal, steel and chemical raw materials. As one of such vibrating type sieving devices, Japanese Patent Laid-Open No. 11-12884
Invention No. 2 has been proposed. According to the present invention, a supporting frame is fixedly provided on the lower side of a frame body on which a sieve mesh is stretched, and a resonance ring is horizontally supported via a plurality of springs on the supporting frame. The sound wave transmitter is fixed, and the elasticity of the spring causes the resonance ring to come into contact with the lower surface of the sieving net.

[0003]

In such a vibrating type sieving apparatus, an unbalanced weight is usually attached to a flywheel which is rotationally driven by a drive motor, and a vertical motive force (centrifugal force due to the rotation of the unbalanced weight) is generated. Power)
It vibrates the sieving net to obtain the required sieving function. Therefore, when a resonance phenomenon occurs between the natural frequency of the sieving device and the rotation speed of the flywheel, the centrifugal force due to the unbalanced weight of the flywheel is extremely large, resulting in an excessive vibration force. Observe the occurrence of a defect that a crack is generated in the housing of the sieving device.

However, the above-mentioned Japanese Patent Laid-Open No. 11-1288.
In the invention of No. 42, the resonance ring and the spring are combined to prevent the damage of the welded portion due to the microvibration from the ultrasonic transmitter, and in other conventional techniques, While maintaining the required sieving function at all times, measures are taken to prevent vibration damage due to resonance generated between the natural frequency of the device and the flywheel rotation speed and to prevent damage to the device. Not not.

In view of the problems of the prior art, the present invention provides a vibrating type sieving apparatus in which a required sieving function is stably obtained by rotation of a flywheel having an unbalanced weight, and the natural frequency of the sieving apparatus is An object of the present invention is to prevent the occurrence of damage to the device due to the resonance phenomenon that occurs between the number of revolutions of the flywheel and the number of revolutions.

[0006]

In order to solve the above problems, the present invention provides an invention according to claim 1 in which a raw material such as sand and coal is placed on a sieve and provided on a flywheel which is rotationally driven by a drive motor. in vibratory sieving device to separate the raw material by applying vibration to the sieve before the imbalance weight which is the vibration level operation sieve the rotational speed of the flywheel when less than a predetermined reference level in the sieving device select the retention allowed to sieve operation controlled within the allowable rotation range as possible and allowed to decrease the vibration level when the vibration level exceeds the reference level
We propose a vibrating type sieving apparatus, which is equipped with a control device that enables selection of vibration suppression control .

According to a second aspect of the present invention, in the first aspect, a rotation speed detector for detecting an operating rotation speed of the flywheel, a vibration detector for detecting a vibration level of the vibration type sieving apparatus, and the vibration. A vibration level setting unit for setting a level reference value is provided, and the control device includes a vibration level comparison unit for comparing a vibration level detection value and the vibration level reference value, and the vibration level comparison unit. On the basis of the comparison result of the vibration level, when the detected value of the vibration level is less than or equal to the reference level of the vibration level, select the sieving operation control that keeps the operating speed within the allowable rotation range in which the sieving operation is possible, operation control method selection for selecting the vibration suppression control allowed to reduce <br/> the vibration level when the detection value of the vibration level exceeds the reference level of the vibration level DOO wherein the is provided.

According to a third aspect of the present invention, in addition to the second aspect, a noise detector for detecting noise of the vibrating type sieving apparatus and a setting means for setting a reference value of the noise are provided, and the control apparatus includes While providing a noise comparison unit that compares the detected value of the noise and the reference value of the noise, the operation control method selection unit, based on the noise comparison result from the noise comparison unit, the detected value of the noise of the noise when more than the reference value to select the old operation control allowed to hold within permissible rotation range capable of operating sieve the working rotational speed, decrease the vibration level when the detected value of the noise exceeds the reference value of the noise It is characterized in that a means for selecting the vibration suppression control to be performed is additionally provided.

According to a fourth aspect of the present invention, a rotation speed control means for receiving a control signal from the operation control method selection section to adjust the operation rotation speed of the flywheel, and a control signal from the operation control method selection section. And a spring constant for setting a spring constant of an elastic supporting portion for supporting the sieving device in response to a control signal from the operation control method selecting portion and a weight position setting means for setting an unbalanced weight position of the flywheel. Setting means, and when the operation control method selection unit selects the sieving operation control, the sieving operation is performed by any one or all of the rotation speed control means, the weight position setting means, and the spring constant setting means. It is characterized in that it is configured to be held within a possible allowable operating range .

According to a fifth aspect of the invention, in the second aspect , the control signal from the operation control method selecting section is received.
Rotation speed control hand to adjust the operating speed of the flywheel
And a control signal from the operation control method selection unit
Set the unbalanced weight position of the flywheel
From the weight position setting means and the operation control method selection section
Elastic support for supporting the sieving device in response to the control signal of
And a spring constant setting means for setting the spring constant of the
Both are characterized in that the weight position setting means is provided with a weight position setting table in which the unbalanced weight position is set corresponding to the type of sieving operation.

According to a sixth aspect of the present invention, there is provided damping element actuating means for actuating the vibration suppressing means for lowering the vibration level of the sieving apparatus, and the damping element is provided when the operation control method selecting section selects the vibration suppressing control. created by the operation means
It is characterized in that the vibration level is lowered by the vibration suppressing means that is moved.

According to the present invention, the operation control method selection unit displays the detected value of the rotational speed of the flywheel, the vibration level comparison result from the vibration comparison unit, and the noise level comparison result from the noise comparison unit in claim 3. Based on the above, when the vibration level is within the range of the work capacity level in the vibration type sieving apparatus, or when the detected value of the noise level is equal to or lower than the noise level reference value, the sieving operation control is selected, With the rotation speed control means, the weight position setting means, and the spring constant setting means, it is possible to constantly control the operation of the vibration sieving device so that the vibration level and the noise level are within the set values, and the required sieving function is provided. The operation control can be stably obtained.

In the operation control method selection unit,
When the vibration level is in the vibration level in the dangerous range, or when the detected value of the noise level in claim 3 exceeds the noise level reference value, the vibration suppression control is selected and the damping element operating means is used. By dampening the vibration level by operating the damping device and suppressing the vibration of the vibrating type sieving apparatus, it is possible to avoid damage to the vibrating type sieving apparatus due to the excessive vibration level. As described above, according to the present invention, the required sieving function due to the rotation of the flywheel is constantly obtained, and the vibration level of the sieving apparatus is prevented from becoming excessively high, so that the occurrence of breakage of the vibrating sieving apparatus is ensured. Can be prevented.

Further, according to the inventions of claims 4 and 5, the weight position setting means is provided with a weight position setting table in which the unbalanced weight position is set in correspondence with the type of sieving operation. , Like the prior art,
It is not necessary to automatically adjust the position of the unbalanced weight during operation of the vibrating sieving device, which eliminates the need for the automatic adjustment device for the unbalanced weight position, which has a complicated structure as in the prior art. Is simplified.

According to a seventh aspect of the present invention, in the first aspect, the elements extend in the horizontal direction and are arranged in parallel with each other.
A flywheel is fixed to each of a pair of rotating shafts that are rotated in reverse so that the unbalanced weights are symmetrical, and their fixed positions are synchronized with the reverse rotations of the pair of rotating shafts, respectively. When the flywheels are rotated, the centrifugal force due to the unbalanced weights of these flywheels acts in the vertical direction, and in the horizontal direction, the vertical excitation force is generated to balance and balance each other. It is characterized by comprising means. According to the invention, in the vibrating type sieving apparatus, a vertical oscillating force is generated while the horizontal force is always balanced, and the vertical direction effective for sieving operation in the oscillating type sieving apparatus is generated. Is obtained without horizontal vibration.

According to the invention of claim 8, if automatic operation or manual operation of the sieving device is selected and operation method selecting means for inputting to the control device is provided, automatic operation or manual operation can be performed. It can be arbitrarily selected.

Further, as in the invention described in claim 9, it is determined whether or not an alarm should be issued based on the vibration level comparison result from the vibration level comparison unit and the noise comparison result from the noise comparison unit, and the determination result is obtained. If the alarm determination means for activating the alarm device according to the above is provided, the abnormal state of the vibrating screen device can be quickly detected, and the device can be protected from damage.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative positions, etc. of the components described in this embodiment are not intended to limit the scope of the present invention thereto, unless there is a specific description, and are merely illustrative examples. Nothing more.

FIG. 1 is a block diagram of an operation control system in a vibrating type sieving apparatus according to an embodiment of the present invention, FIG. 2 is a hardware configuration diagram including a detecting means of the vibrating type sieving apparatus, and FIG. 3 is a weight position adjusting means. Configuration diagram, FIG. 4 is an external view showing a screw portion of the weight position adjusting means, FIG. 5 is a configuration diagram of a weight position setting table in the weight position adjusting means, FIG. 6 is a front view of the main body supporting device, and FIG. 8 is a front view of a vibrating screen device to which the present invention is applied, and FIG. 10 is a side view of a flywheel device. is there.

In FIG. 9 showing a vibrating type sieving apparatus to which the present invention is applied, 100 is a vibrating type sieving apparatus, which is constructed as follows. Reference numeral 105 is a main body, 104 is a sieving portion provided inside the main body 105 and on which a raw material is placed, 102 is a cover for covering the sieving portion 104, and 103 is an inlet for feeding the raw material to the sieving portion 104. Reference numeral 70 denotes a main body supporting device for supporting the main body 105 on a fixed portion such as the ground, and two main body supporting devices are provided at the front and rear. 50 is the sieving part 1
Reference numeral 04 denotes a flywheel device for applying vertical vibrations, and 60 denotes a drive motor for driving the flywheel device 50. In such a vibrating type sieving device, the flywheel device 50 having an unbalanced weight is rotated by the drive motor, and the sieving portion 104 is vertically vibrated by the centrifugal force generated by the unbalanced weight. By sieving the raw material placed on the sieving unit 104, the raw material is crushed and separated.

FIG. 10 shows the details of the flywheel device 50 for imparting vertical vibration to the sieving portion 104. Such a flywheel device 50 is disclosed in Japanese Utility Model Application No. 61-155079 filed by the applicant of the present application. In the figure, reference numeral 51 is a hollow flywheel shaft, which is the drive motor 60 (see FIG. 9). It is directly driven. Reference numeral 57 is a weight moving shaft that is inserted through the inner circumference of the flywheel shaft.
It is rotated in synchronization with. Reference numeral 52 is a hollow flywheel in which an unbalanced weight 53 screwed to a screw shaft 54 is fitted so as to be movable in the radial direction. Reference numeral 058 denotes a bevel gear that connects the screw shaft 54 and the weight moving shaft 57. Reference numeral 58 is an electromagnetic brake connected to the shaft end of the weight moving shaft 57, and applies a required braking force to the weight moving shaft 57. Reference numeral 111 is a bearing that supports the flywheel shaft 51.

In such a flywheel device 50,
With respect to the weight moving shaft 57 that is rotated in synchronization with the flywheel shaft 51, when one of the electromagnetic brakes 58 connected to the shaft end is actuated to brake the weight moving shaft 57, the weight moving shaft 57 is moved. A rotation speed difference is generated between the shaft 57 and the flywheel shaft 51, and in proportion to this rotation speed difference, the flywheel 52 and the screw shaft 54 are simultaneously rotated.
Rotates, the unbalanced weight 53 screwed to the screw shaft 54 moves in the radial direction, and the position in the radial direction changes. The change in the center of gravity of the flywheel 52 due to the change in the radial position of the unbalanced weight 53 changes the centrifugal force, that is, the vibrating force of the flywheel 52. Therefore, by operating the electromagnetic brake 58, the flywheel 5 can be operated during the operation of the vibrating screen device.
The excitation force of 2 can be adjusted arbitrarily.

The present invention relates to an operation control system for a vibration type sieving apparatus configured as above and an apparatus associated therewith. In FIG. 1 showing such an operation control system, reference numeral 100 is a vibrating type sieving apparatus, and 01 is an operating method selecting circuit for selecting and switching automatic operation or manual operation of the vibrating type sieving apparatus 100. In the operation method selection circuit 01, when the driver selects the automatic operation of the vibration sieving apparatus 100, a command signal of the automatic operation is input to the setting device 300. The setting device 3
In 00, 1 is a noise level setting unit, which sets a reference value of the noise level of the vibration sieving apparatus 100, that is, an allowable value of the noise level.

Reference numeral 2 denotes a vibration level setting unit, which sets a reference value of the vibration level of the vibration type sieving apparatus 100, that is, a permissible value of the vibration exciting force. An example of the vibration level reference value (allowable value) is shown below. Working capacity level of vibrating type sieving apparatus 100 1 (weak) = 1.0 to 1.5G 〃 2 (medium) = 2.0 to 2.5G 〃 3 (strong) = 3.0 to 3.5G Vibration level (vibration level requiring vibration suppression) = 4.0 G or more (1) where G is the acceleration of gravity. Further, 3 is a rotation speed setting unit, which is a vibrating screen device 1 for each work capability level.
The operating speed (set speed) of the flywheel shaft 51 at 00 is set.

On the other hand, the actual operating rotational speed of the vibrating type sieving apparatus 100 is detected by the rotational speed detector 4, the vibration level of the sieving apparatus 100 is detected by the vibration detector 5, and the noise level of the sieving apparatus 100 is detected. Is detected by the noise detector 6, and the control device 200 described later
Has been entered in.

FIG. 2 shows the structure of the rotational speed detector 4 and the vibration detector 5 attached to the vibrating sieving apparatus 100 and the vicinity thereof. In FIG. 2, the flywheel shaft 51 of the vibrating sieving apparatus 100 is shown. A pulley 59b (driven pulley) is fixed to the shaft end, and is connected to a pulley 59a (driving pulley) fixed to the output shaft of the drive motor 60 by a fan belt 059. The rotation speed detector 4 is attached to the shaft end of the flywheel shaft 51, detects the rotation speed of the flywheel shaft 51, and inputs it to the control device 200. Reference numeral 70 denotes a main body supporting device that supports the main body 105 of the vibrating type sieving apparatus 100. The lower portion of a support 71 fixed to the main body 105 is fixed to a fixed portion such as the ground through a plurality of springs 72 arranged in parallel. It is supported. The vibration detector 5 is attached to the support 71 to detect the vibration level of the main body 105,
Entering 00.

Reference numeral 200 shown in FIG. 1 is a control device, which is constructed as follows. Reference numeral 7 denotes a rotation speed monitoring unit, which inputs the set value of the operating speed of the vibration sieving apparatus 100 from the rotation speed setting unit 3 and the detected value of the actual operation speed from the rotation speed detector 4, respectively. While comparing the detected value of the operating speed with the set value, the comparison result is sent to the alarm determination means 15 described later, and the detected value of the operating speed is sent to the operation control method selection unit 10 described later. Reference numeral 8 denotes a vibration comparison unit, which compares the detection signal of the vibration level of the sieving apparatus 100 detected by the vibration detector 5 with the vibration reference value set in the vibration level setting unit 2, and compares the comparison result. It is sent to the operation control method selection unit 10 and the alarm determination means 15. Reference numeral 9 denotes a noise comparison unit, which compares a noise detection signal of the sieving device 100 detected by the noise detector 6 with a reference value of the noise set in the noise level setting unit 1, that is, a noise allowable value. , The comparison result is the operation control method selection unit 1
0 and alarm determination means 15.

In the operation control method selection unit 10, the vibration level is based on the detected value of the operating speed, the vibration level comparison result from the vibration comparison unit 8, and the noise level comparison result from the noise comparison unit 9. Working capacity level 1 in the vibration sieving apparatus 100 as indicated by the set value (1)
If the detected value of the noise level is equal to or lower than the noise level reference value, the sieving operation control is selected and the control command signal is output to the rotation speed control means 11. , Weight position setting means 12 and spring constant setting means 13. Further, in the operation control method selection unit 10, the vibration level is the vibration level in the dangerous area (vibration level requiring vibration suppression) = 4.0.
When it is equal to or higher than G, or when the detected value of the noise level exceeds the noise level reference value, the vibration suppression control is selected and the control command signal is sent to the damping element operating means 14.

When sieving operation control is selected in the operation control method selection unit 10, the rotation speed control means 11,
Weight position setting means 12 and spring constant setting means 13
In each of the above, the following control or setting is performed. First, in the rotation speed control means 11, the vibration level of the vibration type sieving apparatus 100 is the work capacity level currently set by the rotation speed setting unit 3 ((1) above).
Rotation speed of the drive motor 60 so that it falls within the range of the vibration level reference value (permissible value) in the work ability levels 1 to 3) and the noise level becomes equal to or lower than the noise level reference value. To control. Thereby, the flywheel shaft 51 directly connected to the drive motor 60
The number of revolutions is automatically controlled so that the vibration level and the noise level of the vibration sieving apparatus 100 are within the range of the allowable vibration level in the current work capacity level and below the allowable noise level.

Further, the weight position setting means 12 is
The weight position adjusting device 80 provided in the flywheel device 50 is controlled and operated as follows.
That is, in FIG. 3, the flywheel device 50 in this embodiment has an unbalanced weight 53 incorporated in a hollow flywheel 52 so as to be reciprocally movable in the radial direction. Further, the weight position adjusting device 80 is
The radial position of the unbalanced weight 53 is adjusted, and 54 is a screw shaft 54 screwed into the central portion of the unbalanced weight 53. The unbalance weight 53 is adapted to reciprocate in the flywheel 52 in the radial direction by the rotation of the screw shaft 54.

FIG. 4 shows a drive mechanism of the screw shaft 54,
In the figure, a ball screw is formed on the outer periphery of the screw shaft 54, and the unbalanced weight 53 is screwed into the nut 055 and the ball screw 054 formed in the weight mounting flange 053. Therefore,
When the screw shaft 54 is rotated, the weight mounting flange 053 and the unbalanced weight 53 fixed thereto move in the flywheel 52 in the radial direction via the ball screw. Reference numeral 057 is a bearing of the screw shaft 54, and reference numeral 056 is a return tube.

Returning to FIG. 3, reference numeral 080 is a motor, and its output shaft, that is, the operating shaft 56, is connected to the screw shaft 54 via a bevel gear 058. Further, the weight position setting means 12 is connected to the motor 080, and the motor 0 is driven by a setting signal in the weight position setting means 12.
80 is driven to rotate, and the rotation of the motor 080
6 and the bevel gear 55 are transmitted to the screw shaft 54, and the unbalance weight 53 is movable in the radial direction by the rotation of the screw shaft 54 as described above.

As shown in FIG. 5, the weight position setting means 12 determines the size and weight of the raw material grains in the vibrating type sieving apparatus 100 and the mounting position of the unbalance weight 53, that is, the flywheel axis. Distance R
The relationship with is set. Such setting is performed in advance when the vibration-type sieving apparatus 100 is stopped, depending on the size and weight of the elementary particles of the raw material to be sieved. Therefore, unlike the prior art, it is not necessary to automatically adjust the position of the unbalance weight 53 during the operation of the sieving apparatus 100, and the position of the unbalance weight 53 having a complicated structure as shown in FIG. No need for automatic adjustment device
The structure of the weight position adjusting device is simplified.

The spring constant setting means 13 sets the spring constant of the spring 72 in the main body supporting device 70 supporting the vibrating type sieving device 100, and the operation control method selecting section 10 selects the sieving operation control. Then, according to the vibration comparison result from the vibration comparison unit 8, when the amplitude of resonance generated between the natural frequency of the sieving apparatus 100 and the flywheel rotation speed becomes larger than the set value, the supporting unit By operating the spring adjusting device 90 to change the spring constant of the spring 72 of the main body supporting device 70, the natural frequency of the sieving device 100 is adjusted.

FIG. 6 shows the structure of the support portion spring adjusting device 90. In the figure, a plurality of springs 72 constituting the main body supporting device 70 are provided with an adjusting plate 73 for changing the effective length thereof and the adjusting plate. A tightening bolt 74 for setting 73 at a predetermined position is provided. In the supporting portion spring adjusting device 90, the adjusting plate 7
The position 3 is placed at a position having an effective length corresponding to the spring constant of the spring 72 set by the spring constant setting means 13, and the adjusting plate 73 is fixed by the tightening bolt 74. The position of the adjusting plate 73 may be adjusted or fixed manually by the tightening bolts 74 or automatically by using a hydraulic cylinder or the like.

Next, when the vibration control is selected in the operation control method selection unit 10 and the control command signal is sent to the damping element operating means 14, the damping element operating means 14 compares the vibrations. Based on the vibration comparison result from the part 8, the required vibration level attenuation amount, that is, the vibration level of the vibration type sieving apparatus 100 becomes equal to or lower than the vibration level (4.0 G) in the dangerous area shown in the formula (1). Such a vibration level attenuation amount is calculated and sent to the damping device 40. As the damping device 40, a known vibration damping means such as a hydraulic damper is used, and the vibration of the vibration sieving device 100 is damped so that the vibration level damping amount given from the damping element operating means 14 is obtained.

As described above, according to this embodiment, the operation control method selection unit 10 detects the operating speed, the vibration level comparison result from the vibration comparison unit 8, and the noise level from the noise comparison unit 9. Based on the comparison result, when the vibration level is within the range of the work capacity level in the vibration sieving apparatus 100, or when the detected value of the noise level is equal to or lower than the noise level reference value, the sieving operation control is performed. By selecting, the rotation speed control means 11, the weight position setting means 12, and the spring constant setting means 13 can control the operation of the vibration sieving apparatus 100 so that the vibration level and the noise level are within the set value range. it can.

Further, in the operation control method selection unit 10, when the vibration level is in the danger level,
Alternatively, when the detected value of the noise level exceeds the noise level reference value, the vibration suppression control is selected and the damping device 40 is operated by the damping element operating means 14 to damp the vibration level. By suppressing the vibration of the vibrating screen device 100, it is possible to avoid damage to the vibrating screen device 100 due to an excessive vibration level.

Next, the rotation speed detection signal from the rotation speed monitoring unit 7, the vibration level comparison result from the vibration comparison unit 8, and the noise level comparison result from the noise comparison unit 9 are respectively as described above. It is sent to the alarm determination means 15, and when the rotation speed, the vibration level or the noise level exceeds an allowable value, the alarm determination means 15 determines the alarm issuance and issues an alarm transmission command signal. Send to device 400.

When the driver selects the manual operation of the vibration sieving apparatus 100 in the operation method selection circuit, the driver uses the manual operation unit 2 to rotate the drive motor 60 and adjust the weight position. The position of the unbalanced weight 53 is adjusted by the adjusting device 80, the natural frequency of the vibrating screen device 100 is adjusted by the supporting part spring adjusting device 90, and the operation of the damping device 40 is operated when the vibration level is excessive. When the number of revolutions, the vibration level, or the noise level exceeds the allowable value, the alarm device 400 is activated to issue an alarm.

Next, FIGS. 7 to 8 are configuration diagrams of the excitation generating means 16 for generating the vertical motive force in the vibrating type sieving apparatus 100. In FIG.
a and 52b are unbalanced weights 53a and 53b
A pair of flywheels attached to the flywheels 52a and 52b. The pair of flywheels 52a and 52b are fixed to the flywheel shafts 51a and 51b that are rotated in opposite directions so that the unbalanced weights 53a and 53b are symmetrical. ing. The pair of flywheel shafts 51
The a and 51b are rotated in opposite directions from the drive motor 60 via the gear train 110. Reference numeral 111 is a bearing that supports the flywheel shafts 51a and 51b.

In the excitation generating means 16, a pair of flywheels 52a and 52b in which the unbalance weights 53a and 53b are fixed symmetrically.
As shown in FIG. 8, since they are rotated in opposite directions at N1 and N2, the vibrating type sieving apparatus 100
The centrifugal force of the unbalanced weights 53a and 53b acts on the vertical direction, and balances them in balance in the horizontal direction. As a result, in the vibrating sieving apparatus 100, a vertical oscillating force is generated in a state where the horizontal force is always balanced, and the vertical activating force effective for the sieving operation in the vibrating sieving apparatus 100 is generated. Vibratory forces are obtained without horizontal vibration.

[0043]

As described above, according to the present invention, when the vibration level is within the working capacity level of the vibration type sieving apparatus or when the noise level is below the reference value, the operation control method is performed. The sieving operation control is selected by the selection unit, and the rotation speed control means, the weight position setting means, and the spring constant setting means keep the vibration type sieving apparatus so that the vibration level and the noise level are always within the set values. The operation control can be performed in a stable manner and the required sieving function can be stably obtained.

Further, when the vibration level is in the vibration level in the dangerous range, or when the noise level exceeds the reference value, the operation control method selecting section selects the vibration suppressing control to activate the damping element operating means. By dampening the vibration level through the above and suppressing the vibration of the vibrating type sieving apparatus, it is possible to avoid damage to the vibrating type sieving apparatus due to the excessive vibration level. As described above, according to the present invention, the required sieving function by the rotation of the flywheel is always obtained stably, and the occurrence of damage to the vibrating sieving device is avoided by avoiding the excessive vibration level of the sieving device. Can be prevented.

In particular, according to the fourth and fifth aspects, since the weight position setting means is provided with the weight position setting table in which the unbalanced weight position is set corresponding to the type of sieving operation, vibration It is not necessary to automatically adjust the position of the unbalanced weight during the operation of the automatic sieving device, and the automatic adjustment device for the unbalanced weight position, which has a complicated structure as in the prior art, becomes unnecessary, and the structure of the weight position adjusting device is Simplified and low cost.

According to the seventh aspect of the invention, in the vibrating type sieving apparatus, a vertical oscillating force is generated when the horizontal force is always balanced, and the vibrating type sieving apparatus is generated. The vertical exciting force effective for the sieving operation can be obtained without horizontal vibration.

[Brief description of drawings]

FIG. 1 is a block diagram of an operation control system in a vibrating screen device according to an embodiment of the present invention.

FIG. 2 is a hardware configuration diagram including a detection unit of the vibrating screen device.

FIG. 3 is a configuration diagram of weight position adjusting means.

FIG. 4 is an external view showing a screw portion of the weight position adjusting means.

FIG. 5 is a configuration diagram of a weight position setting table in the weight position adjusting means.

FIG. 6 is a front view of the main body supporting device.

FIG. 7 is a configuration diagram (1) of the excitation generating means.

FIG. 8 is a configuration diagram (part 2) of the excitation generating means.

FIG. 9 is a front view of a vibrating screen device to which the present invention is applied.

FIG. 10 is a side view of a conventional flywheel device.

[Explanation of symbols]

1 Noise level setting section 01 Operation method selection circuit 2 Vibration level setting section 3 Rotation speed setting section 4 rotation speed detector 5 Vibration detector 6 Noise detector 7 Rotation speed monitoring unit 8 Vibration comparison section 9 Noise comparison section 10 Operation control method selection section 11 Rotation speed control means 12 Weight position setting means 13 Spring constant setting means 14 Damping element actuating means 15 Warning judgment means 16 Excitation generating means 40 attenuator 50 flywheel device 51 flywheel shaft 52, 52a, 52b flywheel 53 Unbalanced weight 54 screw shaft 55 bevel gear 60 drive motor 70 Main unit support device 71 Support 72 spring 73 Adjustment plate 74 Tightening bolt 80 Weight position adjustment device 080 motor 90 Support part spring adjusting device 100 Vibrating type sieving device 104 Sieve part 105 body 200 control device 300 setting device 400 alarm device

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B06B 1/00-15/00

Claims (9)

(57) [Claims] 1. A vibrating sieve for placing raw materials such as sand and coal on a sieve , and imparting vibration to the front sieve by an unbalanced weight provided on a flywheel rotated by a drive motor to separate the raw materials. in the apparatus, old operating system vibration level when less than a predetermined reference level allowed to hold within permissible rotation range capable of operating the rotational speed sieve of the flywheel in the sieving device
Select your, to select the vibration suppression control allowed to decrease the vibration level when <br/> said vibration level exceeds the reference level
A vibrating sieving device comprising a control device that enables selection . 2. A rotation speed detector for detecting an operating rotation speed of the flywheel, a vibration detector for detecting a vibration level of the vibration type sieving apparatus, and a vibration level setting means for setting a reference value of the vibration level. And a vibration level comparison unit that compares a detected value of the vibration level and a reference value of the vibration level, and the vibration based on the comparison result of the vibration level from the vibration level comparison unit. When the detected value of the level is equal to or lower than the reference level of the vibration level, the sieving operation control that keeps the operating speed within an allowable rotation range in which the sieving operation is possible is selected, and the detected value of the vibration level is the reference of the vibration level. claim when exceeding level is characterized by comprising the operation control method selection unit for selecting a vibration suppression control allowed to reduce the vibration levels are provided 1 The vibrating screen device described. 3. A noise detector for detecting noise of the vibrating sieving apparatus and setting means for setting a reference value of the noise are provided, and the control apparatus is provided with the detected value of the noise and the reference value of the noise. While providing a noise comparison unit to compare, the operation control method selection unit, based on the noise comparison result from the noise comparison unit, when the detected value of the noise is less than or equal to the reference value of the noise, the operation of sieving the operating speed is A means for selecting a sieving operation control for keeping it within a possible permissible rotation range and additionally for selecting a vibration suppression control for reducing the vibration level when the detected value of the noise exceeds a reference value of the noise is additionally provided. The vibrating sieving device according to claim 2, wherein 4. A rotation speed control means for adjusting a driving rotation speed of the flywheel in response to a control signal from the operation control method selection section, and the flywheel in response to a control signal from the operation control method selection section. A weight position setting means for setting an unbalanced weight position, and a spring constant setting means for receiving a control signal from the operation control method selection part and setting a spring constant of an elastic support part supporting the sieving device, When the operation control method selection unit selects the sieving operation control, within one of the rotation speed control means, the weight position setting means, and the spring constant setting means, or an allowable operation range in which the sieving operation is possible. 3. The structure according to claim 2, wherein
The vibrating screen device described. 5. A control signal from the operation control method selection unit.
To adjust the operating speed of the flywheel
A control signal from the number-of-turn control means and the operation control method selection unit.
Unbalance weight position of the flywheel
Position setting means for setting the speed and the operation control method
Supports the sieving device by receiving a control signal from the selection unit
Spring constant setting means for setting the spring constant of the elastic support part
3. The vibrating sieving apparatus according to claim 2 , wherein the weight position setting means includes a weight position setting table in which the unbalanced weight position is set corresponding to the type of sieving operation. . Further comprising: a damping element actuation means for actuating the vibration suppressing means allowed to reduce the vibration level of the sieve device, the operation control method selecting unit is operated by the damping element actuating means when selecting the vibration suppression control 3. The vibrating type sieving apparatus according to claim 2, wherein the vibration suppressing means is configured to reduce the vibration level. 7. Horizontally extending and mutually
A flywheel is fixed to each of a pair of rotating shafts arranged in parallel and rotated in reverse so that the unbalanced weight is symmetrical, and the fixed position is synchronized with the rotation of the pair of rotating shafts in the opposite direction. Then, when each flywheel rotates, the centrifugal force due to the unbalanced weight of these flywheels acts in the vertical direction, and in the horizontal direction the vertical direction is configured to balance and balance each other. The vibrating screen device according to claim 1, further comprising a vibrating force generating means. 8. The vibrating type sieving apparatus according to claim 1, further comprising an operation method selecting means for selecting an automatic operation or a manual operation of the sieving apparatus and inputting to the control apparatus. 9. An alarm determination means for determining whether or not an alarm should be issued based on the vibration level comparison result from the vibration level comparison unit and the noise comparison result from the noise comparison unit, and operating an alarm device according to the determination result. The vibrating screen device according to claim 3, wherein the vibrating screen device is provided.