JP2010058115A - Flour mill of grain, seed, and hard resin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flour mill of grain, a seed, and a hard resin which can uniformly feed even a stock with bad fluidity over the whole roll width to be effectively operated and more highly effectively crush an ordinary stock. <P>SOLUTION: The flour mill, which has a stock hopper 1 with an inlet cylinder 1a, a stock feed roll 2, a feeder gate open/shut means 4 for opening and shutting a feeder gate 3, and a pair of milling rolls 5, is equipped with a level sensor 6 for measuring a stock level Aa in an noncontact state and two load cells 7 for measuring a stock A in contact therewith, so that the measured values are input in a control means 9, respectively, by which a space between the stock feed roll and the feeder gate and a gap of the pair of milling rolls are controlled. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cereal / seed / solid resin mill used for cereal milling, seed pulverization, and solid resin milling. More specifically, the present invention relates to grains, seeds, solid resin coarse powder or The present invention relates to a grain / seed / solid resin mill for adjusting the stock level of stock, which is a granular material, and supplying it evenly across the width of a grinding roll.

  Conventionally, the means for adjusting the general stock level of this kind of grain mill is the stock hopper that engages a lever mechanism that moves up and down by the flow of the stock in contact with the stock in the stock hopper. The lever mechanism is installed in the center, the vertical movement of the lever mechanism is transmitted to the hydraulic or pneumatic control mechanism, the control mechanism is activated to control the stock feed roll ON or OFF, and the opening and closing of the crushing roll gap is controlled. It was something to do.

Also, for example, it enables structurally simple product detection in the inflow path for feeding adjustment, detects the weight of the product to be supplied to the feeding cylinder of the cylinder mill, and calculates the result. A control signal can be input to the feeding device via a signal converter (see Patent Document 1), a fixed bearing on the opening side of the notch for rolls provided on the opposite side walls, and a moving bearing on the closing side In a milling roll machine in which at least one pair of rolls that are fixed to each other and mounted at high speeds on fixed bearings and at low speeds on mobile bearings and are rotated at opposite speeds are mounted horizontally. The movable bearing is divided into two parts, and one of the movable bearings is detachably attached to the fixed bearing side, and the other end is pivotally attached to the side wall via a roll opening / closing eccentric ring provided with a roll opening / closing eccentric ring driving means. And roll the other end This roll fine adjustment shaft is engaged with an adjustment shaft, and this roll fine adjustment shaft is connected to a roll fine adjustment eccentric wheel having a roll fine adjustment eccentric wheel driving means provided on the anti-fixed shaft side of the moving bearing via a disc spring ( Patent Document 2), a mechanical sensor and a product supply device, and the product supply device adjusts a supply gap or an adjustable drive means for a supply segment and a grinding roller close to each other. And a product automatic feeding device for a four-roller or eight-roller milling mill comprising a first mechanical signal transmitter for digital signals, comprising: A second mechanical signal transmitter for the analog signal, the rotation speed of the supply roller or the position of the supply segment can be adjusted via the analog signal, Septum those which are controllable via the digital signal (see Patent Document 3) are disclosed.
Japanese translation of PCT publication No. 2002-504854 (first page, FIG. 1) Japanese Patent No. 2788059 (first page, FIG. 1) Japanese Patent Publication No. 8-32309 (1st page, Fig. 1)

  However, a general means for adjusting the stock level is to place the float vertically by placing it vertically in the center of the stock hopper and always burying the float. This method detects the stock level indirectly, but the movement of the float is greatly affected by changes in the bulk specific gravity, spatula angle, etc. associated with the stock change. In addition, since it is in the center of the stock hopper, there is a drawback that it is difficult to detect the risk of uneven supply over the entire width of the stock feed roll due to the fall of the stock level in the axial direction of the stock feed roll of the accumulated stock. In order to make the setting safe, the lower limit value must be increased, and the upper and lower limit values are naturally narrowed. In addition, there is a problem in terms of maintenance because it is buried in the center of the stock, and the hydraulic control mechanism is limited to simple operation despite its high cost and large size, and there is a limit to efficient operation. It was.

  Furthermore, it enables structurally simple product detection in the inflow path for feed adjustment, detects the weight of the product to be supplied to the feed cylinder of the cylinder mill, and converts the result into a signal. That is, a control signal can be input to the feeding device via a vessel, that is, a strain gauge is used as a sensor, a rod is fixed to the strain gauge, and this rod is placed at the point where the stock flows down on the upper center line in the stock hopper. It is mounted so as to be embedded in the stock, and the stock level is indirectly estimated from the pressure of the stock acting on the rod to control the acceleration / deceleration of the feed roll and separation of the grinding roll. It is greatly affected by changes in bulk specific gravity, spatula angle, etc. due to changes in the roll width, and the roll width is not uniform due to detection on the center line of the stock hopper. Fear difficult to detect the, there is likely to be less operating range of the above as well as grinder, in which there are problems also on maintenance.

  Furthermore, the fixed bearing is fixed to the opening side of the roll entrance notch provided on the opposite side wall, and the moving bearing is fixed to the closing side, and the high speed roll is fixed to the fixed bearing, and the low speed roll is set to the moving bearing. In a milling roll machine in which at least one pair of rolls that are attached to each other and rotate opposite to each other are horizontally mounted, each moving bearing is divided into two parts, and one of them is detachable to the fixed bearing side, and the other Is pivotally attached to the side wall via a roll opening / closing eccentric wheel having a roll opening / closing eccentric wheel driving means, and the other end is engaged with a roll fine adjustment shaft. , Which is connected to a roll fine adjustment eccentric wheel having a roll fine adjustment eccentric ring driving means provided on the side of the movable bearing opposite to the fixed shaft via a disc spring, that is, instead of the float, the inlet cylinder of the stock hopper Reflective photoelectric on the outer wall Alternatively, six electrostatic capacity type sensors are arranged in a column along the center line of the inlet cylinder at appropriate intervals, and each time the stock level in the hopper approaches each sensor without contact with the stock, the signal is detected. The system is connected to the microcomputer collectively, and the output signal of the microcomputer controls the acceleration / deceleration of the stock feed roll and the separation of the grinding roll. A method for detecting changes in electrostatic capacity accompanying changes in the stock level through the outer wall of the stock hopper Therefore, the outer wall becomes a barrier and it is necessary to use highly sensitive and expensive sensors and amplifiers. In addition, it takes a lot of time to combine six sensors with a personal computer and process data, and it becomes an expensive method. If the stock can only detect the sensor head placement range along the center line of the inlet cylinder and the stock tilts downward relative to the wall of the inlet cylinder, the inlet cylinder Even if there is enough stock inside, there is a risk that it will be detected if there is little stock, as in the previous case, it is difficult to detect the possibility of uneven supply of the roll as a whole, and furthermore, the height of the inlet cylinder and the stock level within the volume The operation control is based on the above measurement, and there are many start and stop of the pulverizer, which may cause inefficient operation.

  In addition, a mechanical sensor and a product supply device are provided, the product supply device for adjusting the supply gap or an adjustable drive means for the supply segment, and for bringing the grinding roller closer to and away from each other. In a product automatic feeding apparatus for a four-roller type or eight-roller type milling mill, comprising: a first mechanical signal transmitter for digital signals; and an analog signal A second mechanical signal transmitter, the rotation speed of the supply roller or the position of the supply segment can be adjusted via an analog signal, and the mutual approach and separation of the rollers can be controlled via a digital signal In other words, the operating amount of the aforementioned lever mechanism of the float is electrically detected instead of the hydraulic control mechanism, acceleration / deceleration control of the feed roll mechanism, But performs a focus control, in which the aforementioned problems of the float can not be solved.

  In view of the above-mentioned problems, the present invention has been developed as a result of diligent research for the purpose of efficiently feeding even a poorly flowable stock uniformly over the entire roll width and pulverizing more efficiently with normal stock. A stock hopper with an inlet cylinder for storing stock, which is a powder or a granule, disposed in a stock hopper, a stock feed roll for transferring the stock of the stock hopper downward, and a feeder for adjusting the flow of the stock transferred by the stock feed roll Feeder gate opening and closing means that opens and closes the gate and a pair of grinding rolls that pulverize the stock that has passed through the feeder gate, and a level sensor that measures the stock level of the stock in a non-contact manner at the top of the inlet cylinder of the stock hopper And contact the stock above the feeder gate of the stock hopper. Two load cells are mounted with a considerable interval in the horizontal direction, the measured values of the load cell and the level sensor are input to the control means having an amplifier, and the rotational speed set in advance by the control means In a grain / seed / solid resin mill where the control program controls the rotation speed of the stock feed roll, the feeder gate opening / closing means through the feeder gate and the separation of the pair of grinding rolls, the control means is a level sensor. When the measured value of the stock level rises from the set lower limit level and the load of the two load cells rises from the set lower limit level, the stock feeder gate opening / closing means is operated to increase the feeder gate interval. The stock feed roll is rotated while being separated, and at the same time between a pair of grinding rolls. The those returning to the grinding position.

  The grain / seed / solid resin mill according to the present invention is capable of accurately and directly detecting the stock level in the stock hopper flowing into the pulverizing roll directly and always accurately using both the non-contact level sensor and the load cell, or the load cell alone. By controlling the rotation speed of the stock feed roll, the distance between the feeder gates and the separation of the grinding rolls, it is possible to continuously supply the stock to the grinding rolls in full width, and especially between the preset upper and lower limit values of the stock. Since the lower limit value can be set low, it is possible to improve the operating rate by increasing the operating range of the pulverizer and to supply the stock uniformly. This leads to an improvement in the yield of good quality milling, and is an extremely practical invention.

  The present invention relates to a cereal / seed / solid resin mill used for cereal milling, seed pulverization, and solid resin milling, and more specifically, cereal milling, seed pulverization, and solid resin milling powder flowed into a stock hopper. The invention relates to a grain / seed / solid resin mill for adjusting the stock level of a stock, which is a body or a granule, to evenly supply the full width of a pulverizing roll. The stock hopper 1 that stores the stock A that is a body or a granule, the stock feed roll 2 that transports the stock A of the stock hopper 1 downward, and the flow of the stock A that is transported by the stock feed roll 2 are adjusted. Feeder gate opening / closing means 4 for opening and closing the feeder gate 3 and a pair of grinding rolls for grinding the stock A that has passed through the feeder gate 3 The level sensor 6 for measuring the stock level Aa of the stock A in a non-contact manner is mounted on the top of the inlet cylinder 1a of the stock hopper 1 and is in contact with the stock A above the feeder gate 3 of the stock hopper 1 Two load cells 7 to be measured are mounted with a considerable interval in the horizontal direction, and the measured values of the load cells 7 and the level sensor 6 are input to the control means 9 having an amplifier 8 interposed therebetween. The rotational speed of the stock feed roll 2 by the rotational speed control program set stepwise in advance by the control means 9, the distance between the feeder gate 3 through which the stock A passes by the feeder gate opening / closing means 4, and the separation of the pair of grinding rolls 5 In the grain / seed / solid resin mill for controlling the level, the control means 9 has a stock level Aa at the level sensor 6. When the measured value rises from the set lower limit level and the load of the two load cells 7 rises from the set lower limit level, the stock feeder gate opening / closing means 4 is operated to separate the feeder gate 3 from each other. At the same time, the stock feed roll 2 is rotated, and at the same time, the interval between the pair of grinding rolls 5 is returned to the grinding position.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a grain / seed / solid resin mill according to the present invention will be described in detail with reference to the drawings. FIG. 1 outlines an embodiment of a grain / seed / solid resin mill according to the present invention. FIG. 2 is a cross-sectional view of an essential part for explaining an outline of an embodiment of a grain / seed / solid resin mill according to the present invention, and FIG. It is a general | schematic front view for demonstrating the outline | summary of the Example of the mill of solid resin.

  That is, the grain / seed / solid resin milling machine of the present invention is symmetrically divided into two sets of grain / seed / solid resin milling machines as shown in FIG. Each main body casing is provided with a stock hopper 1 provided with an inlet cylinder 1a on the upper side, a product discharge hopper on the lower side, a stock feed roll 2, a feeder gate opening / closing means 4, and a pair of pulverizing rolls, which will be described later. 5 and the like, and the following detailed description will be made only with a grain, seed and solid resin mill on one side, but it has a pair structure.

  As shown in FIG. 2, the stock hopper 1 is arranged above the grain / seed / solid resin mill, and is a raw material such as grain milling, seed pulverization, solid resin milling powder or grains. A stock A, which is a body, is stored. An inlet cylinder 1a is provided at the upper side, and a supply system 1c such as a pipe for supplying the stock A from a raw material supply source is connected to the lower part. 2 and feeder gate opening / closing means 4 are provided, and the stock feed roll 2 and feeder gate opening / closing means 4 are provided with an inclined plate 1b that squeezes downward so that all the stock A passes through the feeder gate 3. The upper side has a transparent window through which the stock level Aa can be seen from the outside.

  Next, in the embodiment, the stock feed roll 2 has two rolls arranged in an obliquely downward direction at a lower opening of the stock hopper 1 and rotated in the same direction. The stock A is introduced into a feeder gate 3 to be described later and transferred downward. Each stock feed roll 2 is mechanically connected to a variable speed stock feed roll geared motor 2a, and the stock feed roll geared motor 2a. Is provided with a speed controller 2b, which is driven by a signal sent from the control means 9 described later to the speed controller 2b.

  Next, the feeder gate opening / closing means 4 adjusts the flow of the stock A transferred by the stock feed roll 2, and the feeder gate opening / closing lever 4b pivotally attached by the pivot pin 4a is used as the feeder gate opening / closing actuator 4c. The feeder gate opening / closing lever 4b is pivoted by moving the feeder gate opening / closing actuator 4c forward and backward, and the distance between the feeder gate 3 between the feeder gate opening / closing lever 4b and the stock feed roll 2 is mechanically connected. Is to open, close and adjust.

  Further, the pair of pulverizing rolls 5 are horizontally arranged so as to be separable in the horizontal direction, that is, at least one of the pulverizing rolls 5 is mechanically connected to the pulverizing roll separating actuator 5a and moved in the horizontal direction so as to be separated. The crushing roll gap adjusting means 5b for adjusting the gap between the pair of crushing rolls 5 is provided, and the pair of crushing rolls 5 pass through the feeder gate 3 by rotating relatively in the middle direction. The stock A flowing down is pulverized.

  Further, the level sensor 6 measures the stock level Aa of the inlet cylinder 1a and the stock A of the stock hopper 1 in a non-contact manner. A mounting hole is formed in the top surface of the inlet cylinder 1a of the stock hopper 1, The sensor head is mounted in the mounting hole with the sensor head facing downward, and is connected to the control means 9 via an amplifier 8 described later.

  The load cell 7 is measured by contacting the stock A in the vicinity of the upper part of the feeder gate 3 of the stock hopper 1, and at least two of the load cells 7 are mounted in the horizontal direction above the inclined plate 1 c constricted below the stock hopper 1. It is possible to measure the inclination of the stock A by attaching it in the horizontal direction in contact with the stock A.

  Next, the control means 9 uses a sequencer and is connected to the level sensor 6 and the load cell 7 through an amplifier 8, and the measured value of the stock A at the level sensor 6 and the load cell 7 is measured. The signal is amplified by an amplifier 8 and input.

  The control means 9 is electrically connected to a speed controller 2b of a mechanically connected stock feed roll geared motor 2a for rotating the stock feed roll 2, and a rotational speed control program set in a stepwise manner in advance. Thus, the rotational speed of the stock feed roll 2 is controlled.

  Further, the control means 9 is electrically connected to a feeder gate opening / closing actuator 4c for pivoting a feeder gate opening / closing lever 4b of the feeder gate opening / closing means 4 provided for adjusting the distance between the feeder gates 3. The gate opening / closing actuator 4c is moved forward and backward to pivot the feeder gate opening / closing lever 4b, thereby opening / closing and adjusting the interval between the feeder gates 3 and adjusting the flow of the stock A flowing into the feeder gate 3.

  Further, the control means 9 controls the separation of the pair of pulverizing rolls 5, and one of the pair of pulverizing rolls 5 is mechanically connected to the pulverizing roll separation actuator 5a, and the pulverizing roll separation actuator 5a. Is electrically connected to the control means 9 and is moved by a signal transmitted from the level sensor 6 or the load cell 7.

  Next, when the measured value of the stock A at the level sensor 6 or the load cell 7 reaches the set lower limit level, that is, when the stock A cannot be supplied to the full width of the pair of grinding rolls 5, the control is performed. The means 9 stops the rotation of the stock feed roll 2, operates the feeder gate opening / closing means 4 to close the interval between the feeder gates 3, and simultaneously separates the pair of grinding rolls 5.

  Further, when the measured value of the stock A at the level sensor 6 or the load cell 7 rises from the set lower limit level, that is, when the stock A can be supplied to the full width of the pair of grinding rolls 5, the control means 9, the stock feeder gate opening / closing means 4 is actuated to separate the gap between the feeder gates 3 and the stock feed roll 2 is rotated. At the same time, the gap between the pair of grinding rolls 5 is returned to the grinding position.

  Further, the level sensor 6 has a guarantee function against temperature change, and is provided with an air gun 6a that removes a minute amount of dust adhering to the level sensor 6 by periodically blowing air.

  The grain / seed / solid resin mill according to the present invention is suitable for providing a wide range of raw material stock and efficiently providing high quality powder at low cost.

FIG. 1 is a schematic side view for explaining an outline of an embodiment of a grain / seed / solid resin mill according to the present invention. FIG. 2 is a cross-sectional view of an essential part for explaining the outline of an embodiment of the grain / seed / solid resin mill according to the present invention. FIG. 3 is a schematic front view for explaining the outline of the embodiment of the grain / seed / solid resin mill according to the present invention.

A stock Aa stock level 1 stock hopper 1a inlet tube 1b supply system 1c inclined plate 2 stock feed roll 2a geared motor for stock feed roll 2b speed controller 3 feeder gate 4 feeder gate opening / closing means 4a pivot pin 4b feeder gate opening / closing lever 4c Feeder gate open / close actuator 5 Crushing roll 5a Crushing roll separation actuator 6 Level sensor 6a Air gun 7 Load cell 8 Amplifier 9 Control means

Claims (1)

  A stock hopper with an inlet cylinder for storing stock, which is powder or granules disposed above, a stock feed roll for transporting the stock of the stock hopper downward, and a flow of stock transported by the stock feed roll Feeder gate opening and closing means for opening and closing the feeder gate to be adjusted, and a pair of pulverizing rolls for pulverizing the stock that has passed through the feeder gate, and measuring the stock level of the stock in a non-contact manner at the top of the inlet cylinder of the stock hopper And two load cells to be measured in contact with the stock above the feeder gate of the stock hopper with a considerable distance in the horizontal direction, and the load cell and the level sensor are connected to each other. The measured value is input to the control means with an amplifier, and the control means Grains, seeds, and solids that control the rotation speed of the stock feed roll, the distance between the feeder gate through which the stock passes by the feeder gate opening / closing means, and the separation of the pair of pulverizing rolls by a rotational speed control program set in stages. In the resin mill, when the control means rises from the lower limit level where the stock level measurement value by the level sensor is set, and the load of the two load cells rises from the lower limit level set, the stock feeder A cereal / seed / solid resin milling machine, wherein a gate opening / closing means is operated to separate a feeder gate, rotate a stock feed roll, and simultaneously return a pair of grinding rolls to a grinding position.

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