JPH081004Y2 - Crusher protector - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a protection device for a crusher provided in a waste treatment facility.

[Conventional technology]

At the waste treatment facility, the waste collected by the waste collection truck is thrown into a shredder or other crusher by a conveyor.

The above crusher crushes the input waste finely with a breaker liner and grinder that swivels around a vertical axis and a shell liner that is fixed inside the shell. Is fed to the lower end of the discharge conveyor, conveyed upward, and fed to a magnetic separator or the like.

[Problems to be solved by the device]

Since the above crushers are intended to crush paper, wood, cloth, etc., when unsuitable materials for crushing such as iron ingots and stones are thrown in, they must be promptly discharged. The machine may be damaged.

An object of the present invention is to provide a device for protecting a crusher by performing an operation such as promptly detecting this when an unsuitable material for crushing is thrown into the crusher and stopping the crusher. is there.

[Means for solving the problem]

In order to solve the above-mentioned problems, the present invention installs a vibration detection device that emits an output signal proportional to the magnitude of vibration in a part of the crusher, and the output signal from this vibration detection device is set in advance. When a certain upper limit is exceeded, the dust supply conveyor to the crusher is stopped and the control device that opens the foreign material discharge automatic gate installed in the crusher and the output signal from the vibration detection device are set in advance. Provide a protection device for the crusher that has a control device that stops the dust supply conveyor and discharge conveyor to the crusher when it exceeds the value, opens the foreign material discharge automatic gate provided in the crusher, and stops the crusher .

[Action]

Since the present invention has the above-mentioned configuration, the vibration of the crusher becomes large when there is an unsuitable crushing object such as an iron ingot in the trash that is thrown into the crusher from the waste supply conveyor.

The crusher is equipped with a vibration detection device that constantly oscillates the vibration of the crusher as an electrical signal, and the amplitude of this vibration is detected and the amplitude is preset to an upper limit value. Since a control device that determines that it is abnormal when it exceeds the above is connected, when the vibration of the crusher becomes large as described above, the control device works to stop the dust supply conveyor and at the same time the automatic gate for foreign matter discharge opens and , Unsuitable for crushing is taken out.

If the swing of the crusher returns to the normal value due to the removal of foreign matter as described above, the crusher continues to operate.

Also, if the foreign matter is not discharged even when the automatic foreign matter discharge gate is opened and the vibration of the crusher does not diminish, stop the operation of the discharge conveyor and the crusher and inspect the crusher.

〔Example〕

In FIG. 1, reference numeral 1 denotes a refuse collection vehicle, and the refuse collected by the collection vehicle 1 is thrown into a shredder 3 by a refuse feeding conveyor 2 through a feeding hood 4.

As the crusher 3, for example, a shredder as shown in FIG. 4 is used.

That is, in FIG. 4, 5 is a cylindrical discharge ring, and 6 is a shell fixed to the upper part of the shell. The shell 6 has a shallow taper shape with a wide upper part, and the upper end is opened as a charging port. Also, these rings 5,
A large number of upper shell liners 7 and lower shell liners 8 are fixed to the inside of the shell 6, and these shell liners 7, 8 are thick and thin and are arranged in an appropriate order to form unevenness. It's happening.

Reference numeral 11 denotes a vertical rotor shaft provided in the center, which is not shown in the drawing, but is rotated by a drive device provided in the lower portion.

A breaker 12 and a breaker liner 13 are attached to the upper part of the rotor shaft 11, and rotor disks 14, 15 and 16 are fixed to the upper part, the middle part and the lower part of the rotor shaft 11 respectively. Multiple grinders 18 with pins 17
Install.

In addition, a sweeper 19 is provided below the lower rotor disk 16.
And a sweeper liner 20 is provided.

As described above, from the refuse supply conveyor 2 to the input hood 4
The dust thrown into the shell 6 via the breaker 12 and the breaker liner 13 rotating with the rotor shaft 11 collides with the liner 7 inside the shell 6, is crushed and moves downward, and further moves to the grinder 18 and the liner. After being finely crushed with 8 and the discharge chute shown in FIG.
It is discharged onto the discharge conveyor 32 via 21.

An automatic foreign matter discharging gate 24 is provided on one side of the lower portion of the charging hood 4.

As shown in FIG. 3, the gate 24 opens and closes a foreign matter discharge port 25 provided in the feeding hood 4, and opens and closes around an upper shaft 26 and is driven by an air cylinder 27.

Further, the gate 24 is communicated with the upper portion of the discharge chute 21 by a chute 28.

Reference numeral 30 is a vibration detection device having a function of converting vibration into an electric signal, which is attached to the shell 6 of the crusher 3 and its output circuit is connected to the control device 31.

The control device 31 controls the operation of the crusher 3 and the setting of the upper limit value of the vibration of the crusher 3, and when the swing of the crusher 3 transmitted from the detection device 30 exceeds the upper limit value, the air cylinder 27 working, crusher 3 and garbage supply conveyor 2
It controls the stop and operation of the discharge conveyors 32 and 33.

In the above-mentioned embodiment, when the waste thrown into the waste supply conveyor 2 from the waste collection vehicle 1 does not include unsuitable materials for crushing, the waste input conveyor 2, the crusher 3, and the discharge conveyors 32, 33 are operated normally. Continuing, the automatic gate 24 is the foreign matter outlet
Since 25 is closed, the dust thrown into the shredder 3 from the conveyor 2 via the feeding hood 4 is shredded to an appropriate size, and is discharged onto the discharge conveyor 32 via the discharge chute 21.

During this period, the amplitude of the vibration sent from the vibration detection device 30 to the control device 31 is substantially constant as shown in a of FIG. 5, and does not reach the upper limit value b.

Now, if unsuitable materials for crushing such as iron ingots are mixed as foreign matter in the waste thrown into the crusher 3, the foreign matter will not be crushed and will perform abnormal movement at the upper part of the crusher 3, so crushing The balance of the machine 3 is lost and a large vibration is generated, and the amplitude of the signal sent from the vibration detection device 30 to the control device 31 is a ′,
When it becomes large like a ″ and the swing exceeds the upper limit value b, it is judged that a foreign object has been introduced and a gate open signal is transmitted to the air cylinder 27 to open the gate 24 as shown by the chain line in FIG. .

At the same time, a stop signal is also transmitted to the drive device of the refuse supply conveyor 2 to stop the conveyor 2.

When the foreign matter is discharged from the discharge port 25 to the chute 28 by the above operation, the swing of the crusher 3 returns to the original range of a, so the gate 27 is set to the closed position of the discharge port 25 by the cylinder 27, and the conveyor 2 Restart operation.

Further, as described above, if the swing does not return to the original state even if the foreign matter discharge port 25 is opened and the conveyor 2 is stopped, the crusher 3 is stopped and at the same time all the conveyors 2, 32, 33 are stopped,
The crusher 3 is inspected, foreign substances are removed, and then the operations of the crusher 3 and the conveyors 2, 32, 33 are restarted.

[Effect of device]

As described above, the present invention is provided with a vibration detecting device in the crusher and opens the foreign matter discharging automatic gate to remove the foreign matter when the amplitude of the crusher exceeds a preset upper limit value. It is possible to prevent the crusher from being damaged due to the inclusion of foreign matter.

If foreign matter is not discharged and vibration with a large amplitude continues, stop the crusher and the waste supply conveyor and discharge conveyor, inspect the inside of the crusher, and remove foreign matter, so the crusher is sufficiently protected. And so on.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the device of the present invention, FIG. 2 is an enlarged side view of a part of the same as in the vertical section, FIG. 3 is an enlarged vertical side view of the automatic gate section, and FIG. 4 is a crusher. FIG. 5 is an output waveform diagram of the vibration detecting device, and FIG. 2 ... refuse supply conveyor, 3 ... shredder, 24 ... automatic gate for foreign matter discharge, 27 ... air cylinder, 30 ... vibration detector, 32, 33 ... discharge conveyor, a ... normal swing,
a ', a "... Abnormal amplitude, b ... Upper limit value.

Claims (2)

[Scope of utility model registration request] 1. A crusher equipped with a vibration detecting device for transmitting an output signal in proportion to the magnitude of vibration, and crushing when the output signal from the vibration detecting device exceeds a preset upper limit value. A crusher protection device equipped with a control device that stops the refuse supply conveyor to the machine and opens the automatic foreign material discharge gate installed in the crusher. 2. When the output signal from the vibration detection device exceeds a preset upper limit value, the dust supply conveyor and the discharge conveyor to the crusher are stopped and the foreign material discharge automatic gate provided in the crusher is opened. The crusher protection device according to claim 1, further comprising a control device for stopping the crusher.