JPH07144172A - Screen damage discriminating method of vibrating screen device and device therefor - Google Patents

Abstract

PURPOSE:To provide a device capable of easily discovering failure of a screen of a vibrating screen device. CONSTITUTION:This screen damage discriminating device 4 consists of a frame body 25 having a coarse particle receiving net 26 supported rotatably on a machine base 20 a coil spring 30 holding the frame body 25 at a horizontal position and a contactless switch 35 to detect sinking of an objects to be detected. When the screen of the vibrating screen device is worn out and broken, e.g. by passing through of raw material particles, coarse raw material particles flowing out through the broken face of the screen are received on the coarse particle receiving net 26, the object S to be detected is sunk by the received weight and the sinking is detected by the contactless switch 35 and displayed on a displaying device 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sieving breakage discriminating method and its apparatus in a vibrating sieving apparatus for sieving a pulverized raw material into particles having a certain size.

[0002]

2. Description of the Related Art For example, porcelain clay as a raw material for an insulator is roughly pulverized by a coarse pulverizer, and the coarsely pulverized raw material is sieved through a vibrating sieving device. Then, the fine raw material particles below the sieve opening of the vibrating sieving device are put into the storage tank through the sieve and temporarily stored, and a predetermined amount is taken out from the storage tank and finely pulverized in the next step. Is done.

At the time of sieving, the raw material particles which are coarser than the opening of the sieve have been returned to the coarse crusher through a pipe and re-pulverized. However, the sieve included in the vibrating sieving apparatus is abraded by the passage of the raw material particles, etc., and may be broken into meshes in some cases. For this reason, the opening of the sieve becomes partially large, and even raw material particles having a size larger than that of the sieve are thrown into the storage tank after passing through the sieve, and the pulverization time by the fine pulverizer in the next step is increased. It was a cause of prolongation.

Then, in order to detect the breaking of the net,
The worker regularly inspected the sieve of the vibration sieving device installed at a high place (above the storage tank).

[0005]

However, the above-mentioned inspection work is a work at a high place for a worker, which is extremely dangerous and a painful work. Also, between the time when the mesh is broken and when it is discovered by regular inspection, coarse raw material particles that are larger than the openings of the sieve pass through the sieve and are thrown into the storage tank. Was affecting the crushing time.

The present invention has been made by paying attention to the problems existing in the above-mentioned prior art, and its object is to determine the breakage of the screen of the vibrating sieving apparatus, which can easily detect the sieving breakage of the vibrating sieving apparatus. A method and an apparatus therefor are provided.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, in the invention of claim 1, in a method of sieving a primary raw material with a vibrating sieving device, the size of the sieved secondary raw material particles is detected. Then, the presence or absence of damage to the screen of the vibrating screen device is determined.

Further, according to the second aspect of the present invention, it is determined whether the secondary raw material grains pass through the openings of a predetermined size to judge the sieve breakage. Further, according to the invention of claim 3, a detection part for detecting the size of the secondary raw material particles is provided on the discharge side of the vibrating sieving device for sieving the primary raw material.

Further, in the invention of claim 4, the detecting portion elastically holds the net body having a predetermined opening arranged on the discharge side of the vibrating screen device so as to be able to move up and down, and the net body in the raised position. It is provided with a holding member and a detection means for detecting the subsidence of the net body.

In addition, in the invention of claim 5, the detecting portion comprises a mesh body having a predetermined opening arranged on the discharge side of the vibrating screen device, and a detecting means for detecting a load applied to the mesh body. It is a thing.

[0011]

In the sieving breakage discriminating method of the oscillating sieving apparatus and the apparatus configured as described above, the primary raw material is sieved by the oscillating sieving apparatus. Then, the size of the sieved secondary raw material particles is detected, and the presence or absence of damage to the sieve of the vibration sieving device is determined. Therefore, the breakage of the vibrating screen device can be safely, easily, and swiftly determined by a worker without performing inspection work at a high place.

The presence or absence of breakage of the sieve is detected by the subsidence of the mesh body by the secondary raw material particles having a size larger than a predetermined size staying on the mesh body having a size larger than the predetermined mesh size. Alternatively, the presence / absence of breakage of the sieve can be detected by measuring the load applied to the net body by retaining the secondary raw material particles having a predetermined size or more on the net body.

[0013]

First Embodiment Hereinafter, a first embodiment in which the method for discriminating sieve damage of a vibrating sieving apparatus according to the present invention and the apparatus are incorporated into a sieving apparatus will be described with reference to FIGS. 1 to 4.

In the present embodiment, the vibrating and sieving apparatus will be described as a vibrating and sieving apparatus for sieving coarsely ground porcelain clay as a raw material for insulators. As shown in FIG. 4, an impeller breaker 1 as a coarse crusher for coarsely crushing clay (not shown) is installed on the floor surface of a factory or the like.
The impeller breaker 1 is for crushing porcelain clay charged from the charging port 10 by rotation of a rotor (not shown) having a blade plate, and then crashing it into a breaker plate (not shown) to roughly crush it. Then, the primary raw material particles are discharged from the discharge port 11.

The bucket conveyor 2 is arranged in parallel with the impeller breaker 1, and the coarsely crushed porcelain clay (hereinafter referred to as primary raw material grains) discharged from the impeller breaker 1 is conveyed upward. Although not shown, the bucket conveyor 2 has a plurality of buckets arranged in a belt shape in a frame 12. A charging port 13 is formed at a lower end portion of the bucket conveyor 2 and the impeller breaker 1 is provided.
Is connected to the discharge port 11 of. A discharge port 14 is formed at the upper end of the bucket conveyor 2, and the primary raw material particles conveyed by the bucket conveyor 2 are charged into the charging port 15 of the vibrating screen device 3 from the discharge port 14.

A vibrating and sieving device 3 is arranged near the discharge port 14 of the bucket conveyor 2, and the primary raw material grains are sieved by vibration into secondary raw material grains having a certain particle size or less. Although not shown, the vibrating sieving device 3 has a sieving inside the main body, and vibrates the sieving by a Uras vibrator having a plurality of poles.

From the outlet 17 of the vibration sieving device 3 to the pipe 1
A sieve breakage discriminating device 4 is disposed on the downstream side via the device 6. As will be described in detail later, the sieve breakage discriminating device 4 detects the breakage of the sieve of the vibrating sieve device 3 and displays the fact on the display device 5.

The storage tank 6 is a sieve damage discriminating device 4
The secondary raw material particles, which are disposed below the screen and are sieved by the vibrating and sieving device 3, are put into the storage tank 6 through the pipe 16 and the sieving breakage discriminating device 4 and temporarily stored. The coarse primary raw material particles that have not been used as the secondary raw material and have been sieved by the vibrating and sieving device 3 are transferred from the raw material discharge port 7 of the vibrating and sieving device 3 to the raw material input port 9 of the impeller breaker 1 through the raw material pipe 8. It is thrown in and crushed again.

Next, the sieve breakage discriminating device 4 of the vibration sieving device 3
Will be described with reference to FIGS. A machine base 20 is fixedly attached to the upper surface of the storage tank 6, and the machine base 20 shown in FIG.
A support 21 is attached to the left end of the. A shaft 22 is rotatably held by a support tool 23 on the upper surface of the support 21. A pair of connecting members 24 are fixed to both ends of the shaft 22. A frame 25 is attached to the connecting tool 24 and is rotatable about the shaft 22. The frame body 25 holds a coarse receiving mesh 26 as a mesh body having an opening slightly larger than the opening of the sieve of the vibrating sieving apparatus 3.

A spring base 28 as a holding member is provided at the right end of the machine base 20 in FIG. A pair of guide shafts 29 are erected on the spring base 28. A coil spring 30 is inserted in each of the guide shafts 29, and an upper end portion of each of the guide shafts 29 is inserted in a pair of through holes 31 formed in the right side portion of the frame body 25.

The right side portion of the frame body 25 in FIG. 1 is always urged upward by the coil spring 30, but a nut 32 is provided on the upper end portion of the guide shaft 29.
Is screwed in, the biasing force of the coil spring 30 is accumulated, and the frame body 25 is held in a horizontal state.

When the sieve of the vibrating sieving device 3 is worn and broken due to the passage of secondary raw material grains, the coarse primary raw material grains flowing out from the broken surface of the sieve are retained in the coarse receiving net 26. Then, due to the staying weight, the side surface of the frame body 25 is sunk around the shaft 22.

A proximity switch 35 as a detecting means is arranged at one end of the spring base 28 so as to correspond to the detected element S on the side surface of the frame 25 due to the sinking. Then, when the coarse primary raw material grains retained on the rough receiving net 26 become a constant amount, and as shown in FIG. 3, the detected element S is positioned to face the proximity switch 35 due to the sinking of the rough receiving net 26, The proximity switch 35 is activated.

The display device 5 is electrically connected to the proximity switch 35 and displays the operation of the proximity switch 35. next,
The operation of this embodiment configured as described above will be described.

The pottery clay charged from the charging port 10 of the impeller breaker 1 is coarsely crushed to become primary raw material grains. The primary raw material particles are conveyed by the bucket conveyor 2 and put into the vibration sieving device 3. The charged primary raw material particles are sieved by the vibration sieving device 3. The sieved secondary raw material particles are put into the storage tank 6 through the pipe 16 and the sieve breakage discriminating device 4 and temporarily stored. That is, since the coarse receiving net 26 of the sieve breakage determining device 4 has a larger opening than the sieve of the vibrating sieving device 3, the secondary raw material particles screened by the vibrating sieving device 3 pass through the coarse receiving net 26. It passes and reaches the storage tank 6. And
A predetermined amount is taken out from the storage tank 6 and finely pulverized as the next step (not shown).

At this time, when the sieve of the vibrating sieving device 3 is worn and broken by, for example, passage of secondary raw material grains, coarse primary raw material grains flow out from the ruptured surface of the sieve and stay in the coarse receiving net 26. To be done. Due to the retained weight of the primary raw material grains, the coarse receiving net 26 of the sieve breakage discriminating apparatus 4 is settled together with the frame 25 against the spring force of the coil spring 30 as shown in FIG. Due to this sinking, the proximity switch 35 detects the detected element S, and the fact that the sieve of the vibrating sieving apparatus 3 has been damaged is displayed on the display device 5 to notify the operator or the like.

Therefore, it is not necessary to perform the periodic inspection of the vibrating and sieving apparatus 3 at a high place, and the dangerous and troublesome work becomes unnecessary. In addition, even if the mesh breaks, the secondary raw material grains larger than the openings of the coarse receiving net 26 will not be thrown into the storage tank 6. For this reason, it is possible to prevent an adverse effect that the fine grinding time afterwards becomes long due to the secondary raw material particles having large particles.

[0028]

Second Embodiment Next, a second embodiment embodying the method for discriminating sieve damage of the vibration sieving apparatus 3 and the apparatus according to the present invention will be described with reference to FIG.
~ It demonstrates according to FIG. Now, in the second embodiment, the frame 25 to which the coarse receiving net 26 of the sieve breakage discriminating apparatus 4 is attached
The holding means is different from the above-described first embodiment, but the other structure is the same as that of the first embodiment.

That is, in the second embodiment, a total of four guide shafts 41 are erected on the machine base 20 on both sides of the frame body 25, and the coil springs 4 are provided on the respective guide shafts 41.
0 is inserted and arranged. The frame 25 is held at four points by the four coil coil springs 40.

Therefore, the whole of the frame 25 and the coarse receiving net 26 is lowered by the coarse primary raw material grains flowing out from the broken surface of the sieve. Also, in this embodiment, the guide shaft 41
Since the frame body 25 can be easily removed by removing the nut 43, it is convenient for cleaning the coarse receiving net 26 and the like.

The present invention is not limited to the above embodiments, but can be carried out in the following modes without departing from the spirit of the present invention. (1) Use the sieving breakage discriminating method and the device thereof according to the above-described embodiment for a sieving device for raw materials other than ceramic porcelain for insulators, for example, in food production. (2) As shown in FIG. 7, the frame member 25 is supported by the support tool 51 having the pressure sensor 50, flows out from the damaged portion of the sieve, and is retained in the coarse receiving net 26 to retain the coarse primary raw material grains. The weight is measured and detected by the pressure-sensitive sensor 50, and the screen breakage is notified. In this case, in order to prevent erroneous detection of the pressure sensitive sensor 50 due to resistance or the like when the secondary raw material particles pass through the coarse receiving net 26, as shown in FIG. Timer 52 in between
Is provided, and the fact that the sieve is damaged may be displayed on the display device 5 only when the pressure sensor 50 continues to detect a load of a predetermined amount or more for a certain period of time. (3) The timer 52 of the second item is also used in the first and second embodiments to prevent erroneous detection when the secondary raw material passes through the rough receiving net 26.

[0032]

As described above in detail, according to the present invention,
The worker does not need to regularly inspect the broken state of the sieve, and the worker can be relieved from the dangerous and troublesome work of inspecting at a high place. Further, by detecting the breakage of the sieve at an early stage, it is possible to prevent the primary raw material grains from mixing into the storage tank at an early stage, and to prevent an adverse effect such as an increase in the fine pulverization time in the next step.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment embodying the present invention and is a side view showing a sieve breakage determining device.

FIG. 2 is a top view showing a sieve breakage determination device.

FIG. 3 is an enlarged view showing an operation in the vicinity of the proximity switch in the sieve breakage determining device.

FIG. 4 is a side view showing a sieving device incorporating a sieving breakage determining device.

FIG. 5 is a diagram showing a second embodiment of the present invention and is a side view showing a sieve breakage determining device.

FIG. 6 is a top view showing a sieve breakage determination device.

FIG. 7 is a side view showing another example of a sieve damage determination device.

FIG. 8 is a block diagram showing a detection process of a pressure sensor.

[Explanation of symbols]

3 ... Vibration sieving device, 26 ... Rough receiving net as net, 30
... Coil springs constituting the holding member, 35 ... Proximity switch as detection means for detecting subsidence of the net body, 40 ...
A coil spring that constitutes the holding member, 50 ... A pressure-sensitive sensor as a detection unit that detects a load.

Claims (5)

[Claims] 1. A method for sieving a primary raw material with a vibrating sieving apparatus, wherein the size of the sieved secondary raw material particles is detected to determine whether or not the sieving of the vibrating sieving apparatus is broken. Sieve breakage determination method for sieving equipment. 2. A method for determining a breakage of a sieve in a vibrating screen device, which comprises detecting whether or not the secondary raw material particles pass through an opening having a predetermined size to determine the breakage of the sieve. 3. A sieve breakage discriminating apparatus for a vibration sieving apparatus, comprising a detection unit for detecting the size of secondary raw material particles on the discharge side of the vibration sieving apparatus for sieving the primary raw material. 4. A detection unit, a net body having a predetermined opening arranged vertically on the discharge side of the vibrating screen device, a holding member for elastically holding the net body in a raised position, and a net body sinking. 4. A sieve breakage discriminating apparatus for a vibrating sieving apparatus according to claim 3, further comprising a detection unit for detecting 5. The detection unit includes a mesh body having a predetermined opening arranged on the discharge side of the vibrating screen device, and a detection unit for detecting a load applied to the mesh body. Item 3. A sieve breakage determination device of the vibrating screen device according to Item 3.