JPH07229700A - Quick exhaustion explosion disposal equipment - Google Patents

Abstract

PURPOSE:To obtain quick exhaustion explosion disposal equipment by attaching a tank thereto, by reducing the pressure of the tank by sufficient vacuum exhaustion in a preparatory operation and by making the tank contribute to the reduction of the pressure of the equipment by communication therewith after the completion of the preparatory operation, since an excessively long time is required for the vacuum exhaustion in conventional equipment wherein the vacuum exhaustion is executed after the completion of the preparatory operation. CONSTITUTION:In regard to an airtight explosion disposal apparatus wherein an explosion disposal of an explosive such as a waste explosive is executed after vacuum exhaustion is executed beforehand, quick exhaustion explosion disposal equipment is constituted by having an airtight tank 6 provided outside the explosion disposal apparatus 1, a piping 2 making the tank 9 communicate with the explosion disposal apparatus 1, a vacuum pump 4 made to communicate with the piping 2 and enabling selective vacuum exhaustion of the explosion disposal apparatus 1 and the tank 6, and an on-off valve 7 interposed in an appropriate place of the piping 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rapid evacuation explosion-treatment device which can shorten the time for evacuation of the explosion-treatment device by additionally providing a tank capable of vacuum evacuation.

[0002]

2. Description of the Related Art Conventionally, in an airtight explosion processing apparatus for explosively processing explosives such as waste explosives, in order to prevent propagation of explosive pressure, the inside of the apparatus is evacuated and then processed.

Conventionally, the vacuum evacuation of this explosion processing apparatus is exhausted only by a vacuum pump. When the volume of the explosion processing device is small, the exhaust time is short, so the ratio of the exhaust time to the explosion processing operation and the like is small, and the effect on the number of processing within a predetermined time is small. However, the larger the volume, the longer the exhaust time, the larger the ratio of the exhaust time to the processing operation time, and the greater the influence on the number of treatments (the smaller the number of treatments).

[0004]

The above-described conventional explosion treatment device has the following problems to be solved.

That is, in the conventional explosion treatment device, the explosion treatment device is directly evacuated by the vacuum pump. Therefore, there is a problem that the exhaust time cannot be shorter than the exhaust time determined by the exhaust capacity of the vacuum pump.

In other words, in the conventional apparatus, the vacuum pump remains stopped during the preparatory work for the explosion treatment in the apparatus, and the vacuum pump can be operated only after the sealing of the apparatus is completed. It was a cause of efficiency.

SUMMARY OF THE INVENTION In order to solve the above problems, it is an object of the present invention to provide a rapid exhaust explosion treatment device which can evacuate a separately installed tank during preparatory work to promote decompression of the device by this negative pressure. .

[0008]

Means for Solving the Problems As a means for solving the above-mentioned problems, the present invention is to evacuate in advance and then to dispose of explosives, etc.
In an airtight explosion treatment device for explosive treatment of explosives, an airtight tank provided outside the explosion treatment device,
The tank is equipped with a pipe that connects the tank and the explosion treatment device, a vacuum pump that is connected to the pipe and that can selectively evacuate the explosion treatment device and the tank, and an opening / closing valve that is interposed at an appropriate position of the pipe. The present invention aims to provide a rapid exhaust explosion treatment device characterized by the following.

[0009]

Since the present invention is constructed as described above, it has the following actions.

That is, an airtight tank is provided outside the explosion processing device, the tank and the explosion processing device are connected by a pipe, and a vacuum capable of selectively evacuating the explosion processing device and the tank to the same pipe. Since the pump is in communication and an opening / closing valve is installed at an appropriate place in the pipe, the tank is evacuated by the vacuum pump while the manual preparation work is being carried out in the explosion processing device. Evacuate so that the vacuum pressure is sufficiently lower than the target pressure of the explosion treatment device, and when the preparatory work is completed, seal the explosion treatment device, operate the on-off valve to close the tank, and this time explode treatment Evacuate the device with a vacuum pump.

When it is determined that the target pressure is reached when the vacuum pressure of the explosion processing device is equalized with the vacuum pressure of the tank, the vacuum evacuation is stopped and the opening / closing valve of the explosion processing device and the tank is operated. If they are communicated with each other, both pressures are equalized and the target pressure is obtained. At that time, since the tank is sufficiently lower than the target pressure, if the explosion processing device and the tank are set to have the same capacity, the vacuum pressure due to the vacuum exhaust of the explosion processing device is lower than the target pressure. It can be high enough so that the time to evacuate the detonation treatment device is reduced until the target pressure is reached, compared to the conventional time to evacuate.

The operator may operate the on-off valve, set the operating time of the vacuum pump, or the like, or an appropriate timer,
It may be automatically controlled via a pressure gauge or the like.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The first and second embodiments of the present invention will be described with reference to FIGS. The same components as those in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted unless necessary.

(First Embodiment) A first embodiment will be described with reference to FIGS.

FIG. 1 is a schematic configuration diagram of this embodiment, and FIG. 2 is a time-dependent pressure change diagram in the first embodiment.

In FIG. 1, 1 is an airtight explosion treatment device, 2 is a pipe for connecting the vacuum pump 4, the tank 6 and the explosion treatment device 1 to each other, and 3 is a pipe 2 for opening and closing the explosion treatment device 1 side. An on-off valve installed in the
Is an on-off valve installed in the pipe 2 to open and close the vacuum pump 4 side, and 6 is a vacuum pump 4 that is evacuated to prepare a negative pressure in advance while the explosion treatment preparation work is in progress in the explosion treatment device 1. The tank 7 is an opening / closing valve provided in the pipe 2 for opening / closing the tank 6 side, and 8 is a timer provided to the opening / closing valves 5 and 7 so as to be able to transmit an opening / closing output signal.

Next, the operation of the above configuration will be described.

First, the operation will be summarized. When the explosion treatment device 1 is not evacuated, for example, during the preparatory work or during the opening to the atmosphere, the vacuum pump 4 has a pressure sufficiently lower than the target pressure of the explosion treatment device 1. The tank 6 is evacuated. Before the evacuation of the explosion processing device 1 is started, the evacuation target of the vacuum pump 4 is switched from the tank 6 to the explosion processing device 1.

The fixed time set by the timer 8, or
Only the explosion treatment device 1 is evacuated by the vacuum pump 4 until the pressure of the explosion treatment device 1 reaches a predetermined pressure, and then the tank 6 is connected to the explosion treatment device 1.

Since the pressure in the tank 6 is sufficiently lower than the target pressure of the explosion processing device 1, after the communication, the explosion processing device 1
The pressures in the tank 6 and the tank 6 are immediately equalized and fall below the target pressure. The volume of the tank 6 is V ₂ or more that satisfies the following formula.

P ₁ (e- ^{(S / V1) t1} ) V ₁ + P ₂ (e
^{-(S / V2) t2} ) V ₂ = (V ₁ + V ₂ ) P ₂ P ₁ : Initial pressure of the explosion processing device 1 (Torr) S: Pumping speed of the vacuum pump 4 (m ³ / min) V ₁ : Explosion Volume (m ³ ) of what is evacuated by the processing apparatus 1 t ₁ : Time for evacuating only the tank 6 by the vacuum pump 4 (mi
n) P _2: Explosive processing apparatus 1 of the target pressure (Torr) V _2: Tank 6 volume (m ³⁾ t _2: Set a timer 8 time (min) then acts (operation) will be described in detail.

Note that (1) to
(4) is attached and this is quoted in the explanation. Further, in order to avoid redundancy, the "open / close valve" is simply called "valve". In addition,
The description will be given as part of the iterative processing cycle.

FIG. 2 shows the above specifications as V ₁ : 100 m ³ , P ₁ :
760 Torr, t ₁ : 10 min, P ₂ : 200 Torr, t ₂ :
2.5 min, S: a pressure change diagram in the case where the 30 m ³ / min. The volume V ₂ of the tank 6 at this time is 82 m ³ . In accordance with this state, the tank 6 is evacuated, and after the evacuation treatment device 1 is completely evacuated, the valve 3 is closed and the valve 5 is opened to perform the explosion treatment in the explosion treatment device 1. Then, the explosion processing device 1 is opened. As a result, the pressure in the explosion processing device 1 becomes atmospheric pressure. (Pressure change is shown in Figure 2 (1)). After reaching atmospheric pressure, the valve 3 is closed, the valve 5 and the valve 7 are opened for t ₁ min, and the tank 6 is evacuated by the vacuum pump 4.
(Pressure change is shown in Figure 2 (2)). After t ₁ min, the timer 8 is set, the valve 7 is closed, the valves 3 and 5 are opened, and the evacuation device 1 is evacuated for t ₂ min (the pressure change is shown in FIG. 2C). After t ₂ min, the valve 8 is closed by the timer 8, the valves 3 and 7 are opened, and the explosion processing device 1 and the tank 6 are opened.
And are pressure-equalized, and evacuation is completed. If the vacuum pump 4 can follow a rapid change in pressure fluctuation, the valve 5 can be left open, and the opening operation of the valve 5 after the completion of vacuum exhaust is unnecessary. As a result, the evacuation time of 4.5 min (the pressure change in FIG. 2 (4)) when the tank 6 is not provided can be shortened to 2.5 min.

(Second Embodiment) A second embodiment will be described with reference to FIG.

FIG. 3 is a schematic configuration diagram of this embodiment.

In this embodiment, in order to prevent dust from flowing into the system from the explosion treatment device 1, the filter 9 is installed in the explosion treatment device 1.
And the on-off valve 3 and the timer 8 of the first embodiment.
Instead of the above, a pressure gauge 10 was provided. The other points are the same as in the first embodiment.

The operation from the completion of vacuum exhaust to the start of vacuum exhaust of the explosion processing device 1 is also the same as in the first embodiment. After the vacuum evacuation of the explosion processing device 1 is started, evacuation is performed until the indicated value of the pressure gauge 10 reaches a predetermined pressure. When the pressure gauge 10 reaches a predetermined pressure, the on-off valve 5 is closed, the on-off valve 3 and the on-off valve 7 are opened, and the explosion treatment device 1 and the tank 6 are pressure-equalized,
Complete evacuation. The pressure change is similar to that shown in FIG.

As described above, according to the first and second embodiments, the vacuum pump 4 is operated to keep the tank 6 at a sufficiently low pressure even during the work preparation of the explosive treatment device 1, thus contributing to the low pressure of the explosive treatment device 1. Since it can be done, there is an advantage that the vacuum exhaust time to the target pressure of the explosion treatment device 1 can be saved and the number of explosion treatments within a predetermined time can be improved.

[0029]

Since the present invention is constructed as described above, it has the following effects.

That is, according to the present invention, the airtight tank provided separately is depressurized to a target pressure or less even in the preparatory stage in which the explosion processing device cannot be evacuated yet, and the depressurization is performed after the completion of the preparation of the explosion processing device. Since a sufficiently low pressure of the tank can be contributed, the evacuation time of the explosion processing device is shortened, and the explosion processing work is highly efficient.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a fast exhaust explosion treatment device according to a first embodiment of the present invention.

FIG. 2 is a pressure change diagram according to the first embodiment.

FIG. 3 is a schematic configuration diagram of a rapid exhaust explosion processing device according to a second embodiment of the present invention.

[Explanation of symbols]

 1 Explosion treatment device 2 Piping 3 Open / close valve 4 Vacuum pump 5 Open / close valve 6 Tank 7 Open / close valve 8 Timer 10 Pressure gauge

Claims (1)

[Claims] 1. An airtight explosion treatment device for explosive treatment of explosives such as waste explosive after vacuum evacuation in advance, and an airtight tank provided outside the explosion treatment device and the same tank. It is equipped with a pipe communicating with the explosion treatment device, a vacuum pump which is connected to the pipe and can selectively evacuate the explosion treatment device and the tank, and an opening / closing valve interposed at an appropriate position of the pipe. Rapid exhaust explosion treatment device characterized by.