JPS58100029A - Pulverized grain storing device with drawing out means - Google Patents

Abstract

PURPOSE:To realize efficient discharge with small power consumption by operating a crusher by means of a load sensor and a control member when load below a set value is imposed on a motor of a drawing out conveyor and stopping the crusher when load above the set value is imposed. CONSTITUTION:Rubble ice from an ice machine 6, for example, is scratched down by means of a crusher 4 via leveling means 8, and discharged out of a storing chamber 1 by means of a discharging conveyor 2. A load sensor 21 of the discharging conveyor 2 is an electric current sensor which detects operating current of a motor 22, and on the basis of a signal sent out from the load sensor 21, a control part 20 operates a crusher 4 when load on the motor is below the definite level. On the other hand, when the discharge conveyor 2 sends out a large quantity of rubble ice and the operating current of the motor 22 is increased to exceed a predetermined value, the crusher 4 is stopped by means of a signal from the control part 20 via a gear motor 19. Accordingly, there is no supply of rubble ice by the crusher to the discharging conveyor above requirement. Since the crusher is always operated in the condition close to the definite amount, torque at the starting time is made small and restarting can be smoothly performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is mainly aimed at temporarily storing powder and granular materials that cause a bridging phenomenon and fall in a storage room when stored, such as crushed ice, balas, lime, etc., or flour and other powders. The present invention relates to a storage device for storing water, and particularly to a storage device equipped with a retrieval means.

(1) Prior Art As a storage device for crushed ice that is most likely to cause the bridging phenomenon during storage, the present inventor has developed a storage device having the structure shown in FIGS. 1 and 2.

In this storage device, the shape of the storage chamber 1 is such that the horizontal cross section becomes larger toward the bottom, and the discharge conveyors 2 are arranged in multiple rows on the bottom surface. Discharge conveyor 2
When the ice cube 3 is operated, the crushed ice 3 in the storage room 1 is scraped off the bottom and discharged outside, and as it moves downward, it is horizontally m1
A storage chamber 1 whose surface becomes larger is moved downward without being fixed to the inner wall surface of the storage chamber, and is taken out sequentially from the bottom.

However, in a storage device with this structure, since the overall shape of the storage chamber 1 is formed in the shape of an overhead chime, the horizontal cross-sectional shape becomes smaller as the storage chamber becomes higher, and the storage device has sufficient volume compared to the height. However, there are drawbacks that make it difficult to put it into practical use.

The present inventor disposed a crusher in the storage chamber, regardless of the shape of the storage chamber, and used this to forcibly remove the stored material by Ktg1.
We have developed a device that removes 1.

A crushed ice storage device with a crusher is shown in FIGS. 3 and 4.

In this device, a crusher 4 scrapes off crushed ice onto a discharge conveyor 2F, and the discharge conveyor 2 discharges the crushed ice outdoors.

The crushed ice scraped off by the crusher 4 is transferred to the discharge conveyor 2
The container moves laterally along the bottom surface which is sloped downward toward the container, is separated from the wall surface of the storage chamber, and is pressed against the crusher 4 by its own weight.

This system has vertical walls, so the storage capacity can be increased in proportion to the height. However, the driving torque of the crusher 4 and the discharge conveyor 2 is extremely large, and the discharge conveyor is not in operation for a long time. , it often occurred that this could not be started at all.

The inability to start the discharge conveyor 2 is the biggest drawback of this type of device that hinders its practical use. This is because if it fails to start up, not only will it not be possible to take out crushed ice when needed, but the stored items in the storage room will have to be taken out from above by another method or, in the case of crushed ice, melted and removed. This is because the device loses its functionality completely.

Furthermore, in the device having this structure, as the crusher 4 is operated, the drive torque of the crusher 4 increases,
consumed a large amount of power.

The reason why the driving torque of the crusher increases is that the crushed ice that is initially scraped off by the crusher is then crushed into small pieces by the crusher.

Due to these factors, the motors for driving the discharge conveyor 2 and the crusher 4 have become significantly large, and the motors that drive the discharge conveyor 2 and the crusher 4 have to be forced to be driven by large motors. The disadvantage is that all the parts involved are prone to failure, and in normal continuous discharge conditions, the operating power of the discharge conveyor is relatively small, that is, the load fluctuation is large, so a large horsepower motor is not effective. There was also the drawback of not being able to use it.

■ Purpose The present invention reduces the driving horsepower of the discharge conveyor with an extremely simple structure, effectively eliminates the initial inability to start, and efficiently moves stored powder and granules reliably and smoothly with less power consumption. An object of the present invention is to provide a storage device for powder and granular material, which is equipped with a take-out means that can be easily discharged.

(3) Configuration Embodiments of the present invention will be described below based on the drawings.

The present invention detects the drive torque of the discharge conveyor and operates the crusher when the drive torque of the discharge conveyor is below a certain level. Therefore, a storage device having the structure shown in FIGS. 3 and 4 can be used as an example.

To further explain the storage device shown in FIGS. 3 and 4, this storage device includes a storage chamber 1 for storing powder and granular materials such as crushed ice, and a discharge conveyor 2 disposed at the bottom of this storage chamber 1. and a crusher 4 disposed at the bottom of the discharge conveyor 2.

The storage chamber 1 is formed into an elongated rectangular horizontal cross section, and a crushed ice supply port 5 is opened in a part of the ceiling, and crushed ice made by an ice making machine 6 is supplied from the supply port 5.

The operation of the ice maker 6 is controlled by a level sensor 7 disposed above the storage chamber 1, and the ice making machine 6 is operated at a level below a predetermined level of crushed ice in the storage chamber 1 to store a certain amount of crushed ice in the storage chamber.

It is preferable to provide a crushing ice leveling means 8 in the upper part of the storage chamber 1. In the leveling means 8, leveling plates 10 are fixed to four chains 9 at regular intervals, and the four chains 9 are connected to two sprockets 1 horizontally arranged on both sides in FIG.
1 and the chain 9 is driven by the sprocket 11 to level the supplied crushed ice 3.

The bottom surface 12 of the storage room 1 is sloped downward toward the central discharge conveyor 2, and the crushed ice scraped off at the center is
It slides on the bottom surface 12 under its own weight and is pressed against the crusher 4.

The inclination angle of the bottom surface 12, that is, the angular deviation from the horizontal, is usually 10 degrees or more, preferably Fil 5 to 60 degrees, and optimally 20 to 4 degrees.
The angle is determined to be approximately 0 degrees, and the bottom surface 12 is formed of, for example, a stainless steel plate with a smooth surface so that crushed ice can slide smoothly.

The outer periphery of the storage room 1 is surrounded by a wall 13 that is heat-insulated.

The discharge conveyor 2 is a screw conveyor, and this screw conveyor has a rotary shaft 14 extending in the longitudinal direction of the storage chamber 1, and one end thereof extends outside the storage chamber to discharge crushed ice to the outside.

The crusher 4 has a large number of scraping claws 16 fixed to a shaft 15, and the plurality of shafts 15 are arranged parallel to each other and horizontal to the discharge conveyor.

Specific examples of the scratching claws 16 of the crusher 4 are shown in FIGS. 5 to 7. The scratching claws 16 in FIGS. 5 and 6 are formed in a wide shape extending in the longitudinal direction of the shaft 15, and adjacent scratching claws 16 in the rotational direction are somewhat overlapped. This crusher 4 has the feature of uniformly scraping off crushed ice over the entire length of the shaft 15 by being rotated.

The scratching claw 16 in FIG. 57 is a pin, and this pin is fixed around the shaft 15 according to the size of the crushed ice. pin spacing,
H is usually determined to be 100 dragons or less.

A sprocket wheel 17 is fixed to one end of the plurality of shafts 15, and this sprocket wheel 17 is connected to the chain 1.
8 to a gear motor 19, which rotates all the shafts 15, thereby scraping off the crushed ice in the storage chamber from the center.

The operation of the gear motor 19 of the crusher 4 is controlled by a control member and a load sensor of the discharge conveyor 2.

FIG. 8 shows an example of the control member 20 and the load sensor 21. In this figure, the load sensor 21 of the discharge conveyor 2 is
This i! is a current sensor that detects the operating current of the discharge conveyor drive motor 22. The control member 20 is controlled by the current sensor output.

For example, a meter relay can be used as the current sensor and control member 20.

The current sensor outputs a signal corresponding to the load current of the motor 22, usually a voltage output signal proportional to the current. Based on this output signal, the control member 20 is turned on and operates the crusher 4 when the motor is under a certain load, that is, when the discharge conveyor 2 is idling in the crushed ice or is in a state where a small amount of crushed ice is being discharged. When the crusher 4 is operated and crushed ice is scraped off to the discharge conveyor 2, the discharge conveyor 2 sends out a large amount of crushed ice, and the operating current of the motor 22 increases. This is detected by the current sensor, the control member 20 is turned off, and the operation of the crusher 4 is stopped.

The control member in the on state is controlled by a timer, for example, from 0.5 to
It is also a good idea to forcibly turn it off after 2 seconds.

In this case, the crusher does not crush the crushed ice to the required amount, and overload of the discharge conveyor due to a delay in detection time can be prevented. The control member has a delay or integral circuit and is turned on at a set current or higher for a certain period of time.

In FIG. 9, the load sensor 21 is a torque sensor, and this load sensor 21 is connected to the output shaft of the discharge conveyor drive motor 22.
6, and this load sensor 21 causes the discharge conveyor 2 to
The output signal of the load sensor 21 is sent to the control member 20, and the output signal of the load sensor 21 turns on the control member 20 when the drive torque of the motor 22 reaches a certain amount. , it turns off when it reaches a certain amount.

The control member 20 includes a timer 23, and this timer 23
After the crusher is operated, only the discharge conveyor 2 is operated for a certain period of time. According to this structure, even if the switch of the discharge conveyor [operation%-122] is turned off immediately after the crusher 4 is operated, the discharge conveyor 2 is operated for a certain period of time, and the crushed ice scraped off by the crusher 4 is completely or partially removed. Float +E after discharging leaving behind. Therefore, there is less crushed ice in the discharge conveyor 2 at the time of startup, and the feature of easy and smooth startup is achieved.

The shaft of the crusher does not necessarily have to be rotated, but can also be oscillated at a constant angle.

In FIG. 10, the motor 22 for driving the discharge conveyor is also used as the motor for driving the crusher 4. In FIG.

The crusher shaft 15 is connected via a clutch 24 to a motor 22 for driving a discharge conveyor.

The on/off state of the clutch 24 is controlled by the control member 20 . The control member 20 is controlled by an input signal from a load sensor 21.

The operation of the crusher 4 is such that when the load torque of the discharge conveyor 2 becomes below a certain level, this is detected by the load sensor 21, and the output signal of the load sensor 21 is used to control the control member 2.
0 connects the clutch 24 and operates the crusher 4.

The crusher 4 scrapes the crushed ice onto the discharge conveyor 2,
When the discharge conveyor 2 is ready to send out crushed ice of a predetermined company, the control member 20 releases the clutch 24 to stop the operation of the crusher 4, and thereafter repeats this process to take out the crushed ice.

The crusher 4 shown in FIGS. 11 to 13 has a shaft 15
are arranged vertically and move along the discharge conveyor 2. The crusher 4 includes a traveling base 25, a shaft-driving gear motor 19, and a traveling motor 26 for moving the traveling base 25. The operation of the shaft-driving gear motor 19 is controlled by a control member 20. be done.

The traveling platform 25 moves along a rail 27 fixed near the ceiling of the storage room in parallel with the discharge conveyor 2, and wheels 28 are driven by a traveling motor 26 to travel.

The travel motor 26 is energized together with the gear motor 19 for driving the shaft, and the shaft of the crusher is rotated to move while scraping off the crushed ice.

However, this traveling motor 26 can also be turned on and off by detecting the initial driving torque of the shaft. In this case, similar to the motor of the discharge conveyor, the shaft drive Jll, F) key? −
The current of the motor 19 is detected by, for example, a meter relay, so that the gear motor 19 operates the travel motor 26 at a constant torque or less, and stops the travel motor 26 when the gear motor 19 has a constant torque or more.

The crusher shown in FIG. 13 has two shafts 15 arranged in parallel, spiral claws 16 are fixed to both shafts, and the shafts 15 are rotated to scrape crushed ice upward.

According to this method, the scraped crushed ice is not compressed at the lower end, and the crushed ice can be continuously scraped up and down by the scraping claws 16 on the surface of the shaft 15.

14 to 18 show a crusher 4 whose shaft 15 can move up and down.

The crusher shaft 15 is parallel to the discharge conveyor 2, and both ends are supported by bearings 29 so that it can move up and down within a vertical plane that includes the discharge conveyor 2. It is connected to a string 31 such as a chain or wire so that it can move up and down along. String body 31
is applied to a winch drum 34 connected to a motor 33 via a worm reducer 32, and the winch drum 34 drives the string 31 to lower the bearing 29.

A gear motor 19 for driving the shaft is fixed to the bearing 29.
This drives the crusher shaft 15.

The gear motor 19 for driving the shaft of the crusher is operated at the same time as the motor 33 that moves the crusher down F, or the gear motor 19 drives the shaft F.
Similar to the motor 33 that moves the crusher shaft in the horizontal direction, the motor 33 that moves the crusher downward is operated only when the shaft drive torque of the crusher is below a certain level.

As shown in FIGS. 11 to 18, when the shaft 15 of the crusher 4 moves horizontally or vertically, when the shaft 15 of the crusher 4 is rotated without moving, the scratching pawl 16 of the shaft 15 is moved. The shaft 15 rotates lightly without scraping off the crushed ice. Therefore, the shaft 15 of the crusher 4 is rotated simultaneously with the operation of the discharge conveyor 2, the travel motor 26 or the motor 33 is operated when the rotational torque of the discharge conveyor 2 is below the set value, and after a certain period of time, the timer drive motor 2
It is preferable to stop the operation of the motor 33 or detect the torque of the wastewater conveyor 2 and stop it when the torque of the wastewater conveyor 2 exceeds a set value.

As mentioned earlier, crushers whose operating time is controlled by tires have a problem in that the operating time of the crusher is too long and the crushed ice is not crushed into small pieces, and that more crushed ice than necessary is sent to the discharge conveyor. Therefore, the discharge conveyor will not be overloaded. Although it is possible to control the off-state of the crusher using the torque of the discharge conveyor, this method causes a time delay in increasing the torque of the discharge conveyor, and even if the crusher crushes a considerable amount of crushed ice, The drive torque of the discharge conveyor does not increase immediately, and the crusher has to be operated for a longer time than necessary. Therefore, in the most preferred embodiment, the torque of the discharge conveyor is detected and the crusher is started operating when it is below a set value, and the crusher operation is controlled by a timer, e.g.
It is best to forcibly stop it after 2 seconds.

In the storage device shown in FIG. 19, a discharge conveyor 2 is disposed on one side of a storage chamber 1, and a bottom surface 12 is inclined downward toward the discharge conveyor 2.

■ Effects In the powder storage device equipped with the take-out means configured as described above, the drive torque of the discharge conveyor is detected by the load sensor, the load sensor controls the control member, and the control member controls the operation of the crusher. The load sensor and control member are configured to operate the crusher only when the drive torque of the discharge conveyor falls below a certain level, so that the crusher does not store more material than necessary. There is no overlay on the discharge conveyor, and the discharge conveyor is
The stored material is sent from the crusher after the stored material has been sufficiently delivered or has been delivered to the extent that it rotates lightly. Now, if a large amount of stored material is sent to the discharge conveyor at once, the drive torque of the discharge conveyor will increase, so the crusher will not be operated, and the discharge conveyor will send the stored material outside and rotate lightly. The crusher is operated only when the condition is met. Therefore, the discharge conveyor always discharges the stored material in a state close to a constant quantity. For this reason, the discharge conveyor is not overloaded even temporarily, and the crusher does not scrape off more stored material than necessary, which becomes a load or crushes the stored material into small pieces. It always rotates lightly and smoothly, and achieves the excellent effect of reducing the torque at startup, which is particularly prone to overload, and smoothing out old startups.

The fact that the load torque fluctuation of the discharge conveyor is small means that
It is also effective to be able to use a small horsepower motor effectively.

According to the prototype actually produced by Fubenban, it is a storage device for approximately 5 tons of crushed ice, and the planar shape of the storage room is 2m x 5m.
, a discharge conveyor is disposed extending in the longitudinal direction at the center of the bottom surface, a crusher with five shafts in a vertical row is disposed directly above it, and the discharge conveyor and crusher are driven separately by a 108P motor. With continuous operation of the discharge conveyor, the crusher was only operated for about 0.5 to 2 seconds once every few dozen times, and the discharge conveyor discharged a nearly constant amount of crushed ice.

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional views of a conventional crushed ice storage device, Figures 3 and 4 are longitudinal and cross-sectional views showing an example of a crushed ice storage device, and Figures 5 to 7 are cross-sectional views of a crusher shaft. 8 to 10 are schematic sectional views showing the state of connection between the load sensor and the control member, and 11 to 13 are partial front and side views of the storage device equipped with a crusher that moves in the horizontal direction. A sectional view and a front view of the crusher, FIGS. 14 to 18 are a sectional view and a perspective view of a storage device that has a crusher that moves up and down, and FIG. 19 is a sectional view of a storage chamber with a discharge conveyor disposed on one side. It is a diagram. 1. Storage room, 2. Discharge conveyor, 3. Crushed ice, 4.
・Crusher, 5.. Supply port, 6.. Ice maker, T..
Level sensor, 8... Domestic hand control, 9... Chain, 1
0... Leveling board, 11... Spro nut, 12 - Now bottom, 13 - Φ wall, 14 squares, rotation axis ζ 15 @ shaft, 16.
11 claw, 171 long sprocket wheel ζ18・゛-
Chain, 111-9 gear motor, 20 control members: 21-ν load sensor, 22...motor, 2311-timer, 24...clutch, 25...travel platform, 26...travel motor, 27.・Rail, 28.. Wheel, 29.. Bearing, 30.. Guide rail, 31.. String, 32.. Worm reducer, 33.. Motor, 34.. Winch drum, Applicant: Kyoei Zoki Co., Ltd. 179 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 1st 61st to 6th 7th Figure 8 Figure 12 Figure 13 1st 14th Figure 2 15 Figure 3'; 16 1X 33rd 17th Figure 18

Claims (1)

[Scope of Claims] (+1) A storage chamber is provided in which a supply port for powder and granular material, which is a stored material, is opened at the top and a discharge conveyor is disposed at the bottom. f In a powder storage device, a crusher is disposed on one side, and the crusher scrapes the stored powder onto the discharge conveyor and discharges the stored powder to the outside of the storage room. It is equipped with a load sensor that detects the load of the driving motor, and a control member that controls the operation of the crusher using the output of the load sensor. Powder and granular material having an ejecting means configured to operate the crusher when the following load is applied, and to stop operating the crusher when the load on the drive motor of the discharge conveyor exceeds a set value. storage device. (2) A claim in which the drive motor of the discharge conveyor is an electric motor, the load sensor is a current sensor that detects the current flowing through the electric motor, and the crusher is operated only when the operating current of the motor is below a set value. A storage device for powder and granular material, comprising the taking-out means according to item +11. (3) A patent claim in which the negative M sensor is a torque sensor, the torque sensor is connected between the motor and the crusher shaft, and the crusher is operated only when the crusher shaft is driven with a set torque or higher. A storage device for powder or granular material, comprising a taking-out means according to item (1). (4) Storage of powder and granular material equipped with a take-out means according to claim (1), wherein the control member is provided with a start timer, and the timer stops the operation of the crusher for a certain period of time after the discharge conveyor is started. Device. (5) A storage device for powder and granular material equipped with a take-out means according to claim (m), wherein the control member includes a timer, and the timer operates the discharge conveyor for a certain period of time after the crusher is stopped. (6) A discharge conveyor is disposed horizontally or almost horizontally in the center of the bottom of the storage chamber, and the bottom surfaces on both sides of the discharge conveyor are inclined downwardly toward the discharge conveyor. A storage device for powder and granular material equipped with a means for taking it out. (7) Claim No. 1 in which a discharge conveyor is disposed horizontally or almost horizontally on one side of the bottom of the storage chamber.
A storage device for powder and granular material, which is equipped with a taking-out means as described in 1. (8) The crusher is equipped with the extraction means according to claim m, wherein the crusher includes a shaft and a driving member that rotates or swings the shaft, and the shaft has a scratching claw fixed to its surface. Powder storage device. (9) A storage device for powder and granular material equipped with a retrieving means as set forth in claim (8), wherein the claws of the crusher are either bottles or plates fixed to the surface of the shaft at regular intervals. Claim No. 8, wherein the crusher's claws are formed of a band iron having a helical shape, and the shaft is rotated by a driving member.
2. A storage device for powder and granular material, which is equipped with the means for taking out the powder as described in 1. (11) A patent claim in which the crusher has a plurality of shafts, each of which is spaced apart from each other at a constant interval below -F, and is located in a vertical plane that includes the discharge conveyor and is arranged parallel to the discharge conveyor. A storage device for powder or granular material, comprising a taking-out means according to item (8). (b) The rotating shaft of the crusher is disposed parallel to the discharge conveyor, and the crusher is supported so as to be vertically movable within a vertical plane of the discharge conveyor.
) A storage device for powder and granular material, which is equipped with the taking-out means described in item 2. 03) The crusher is provided with a take-out means according to claim m, in which the rotating shaft of the crusher is vertically supported and is mounted so as to be movable along the axial direction of the discharge conveyor within a vertical plane that includes the discharge conveyor. Powder storage device.