JPS6117036Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is designed to transfer explosive pressure to the outside without significantly destroying the tank when an explosion occurs inside the tank in silos, filtration and dust collectors, and other devices that handle explosive gases and dust. This invention relates to an improvement of a rupture disc type explosive pressure dissipation device that protects the main body of the device by dissipating the pressure into the air.

Compared to door-type explosive pressure dissipation devices, bursting disc type explosive pressure dissipation devices are less likely to cause rainwater to enter the tank or gas leakage, so they are used in silos, dust collectors, and other applications both outdoors and indoors. However, in conventional bursting disc type explosion pressure dissipation devices, the main plate that closes the required openings of the tank body is a laminated plate of a metal plate and a fluororesin film with the required notches. Usually, the explosion pressure is dissipated through the notch by the rupture of the fluororesin film that shields the incision, so the tank body is particularly large and the explosion pressure dissipation device is also large. If necessary, it requires a lot of effort to manufacture and has the drawbacks of insufficient reliability.

The present invention was completed with the aim of providing an explosive pressure dissipation device that does not have the above-mentioned drawbacks, and the illustrated embodiment will be described in detail below.

Figures 1, 2, 3, and 4 show a first embodiment of a silo using the present invention, in which 1 is a tank body with legs 2 that is installed on the ground and serves as the silo body. The vinyl chloride resin powder 4 is accommodated through a chute 3 provided on the upper surface, and the vinyl chloride resin powder 4 is discharged from a discharge device 5 at the lower end. Further, an opening 6 is provided on the upper surface of this tank body 1.
A peripheral portion of a main plate 10 serving as a dissipating plate for closing the opening 6 is sandwiched between the flange portion 7 forming the opening 6 and the presser frame 8 via a gasket 9. It is fixed with bolts 11. The main plate 10 as this diffusion plate is made of a material having sufficient corrosion resistance and strength depending on the purpose of use, such as an 18-8 stainless steel plate or a thin aluminum plate with a thickness of about 0.3 to 1 mm. For example, if the shape is easy to rupture,
As shown in the figure, an appropriate number of plate pieces 13 that are erected by explosive pressure are formed through continuous U-shaped or It is closed with a tape 14 having excellent corrosion resistance, heat resistance, weather resistance, etc., such as aluminum foil tape, silicone resin tape, or polyester resin tape, attached to both sides. On the other hand,
Figures 5 and 6 show the second silo using this invention.
This embodiment is different from the first embodiment described above, in that when large negative pressure and positive pressure are applied alternately, reinforcing crosspieces are provided in the opening 6 as necessary to sufficiently withstand the alternating pressure, and a presser foot is also provided. The frame 8 is also provided with a rising portion 8'' with a crosspiece 8', and an appropriate number of plates that are erected by explosive pressure through continuous notches 12 in the main plate 10 that closes the required openings of the tank body 1 are provided. forming a piece 13;
Tape 14 with the cut 2 attached to both sides of the main plate 10
The point of occlusion with is the same as in the first embodiment. In addition, in the above two embodiments, the notch 12 provided in the main plate 10 is continuous, but
Depending on the conditions such as the material and wall thickness of the main plate 10, the cut may be made in the shape of a broken line so that the plate piece portion 13 is properly held on the main plate 10. may be attached only to one side of the main plate 10 except for a tank body to which negative pressure and positive pressure are applied alternately.

In this structure, although the notch 12 is provided in the main plate 10 that closes the required opening 6 of the tank body 1, the notch 12 is not connected to the main plate 10.
Since the opening 6 of the tank body 1 is properly closed at all times, there is no risk of rainwater entering the tank body 1 or gas leakage. Although it can be safely used in equipment that handles explosive gas or dust as a highly reliable bursting disc-type explosion pressure dissipation device during normal operation, whether outdoors or indoors, an explosion may occur inside the tank body 1. In this case, since the tape 14 that closes the notch 12 is weaker than the main plate 10 that closes each part of the tank body 1 and the opening 6, the tape 14 that closes the notch 12 is An appropriate number of plate pieces 13 that are erected by the blast pressure formed in the cutout 12 are erected from the line connecting the ends of the notches 12 to form a large opening in the main plate 10, and the blast pressure is applied to the tank body. 1) It is radiated to the outside through the opening without any other adverse effects on the main body of the device, and therefore has a sufficient protective function to properly prevent the main body of the device from being destroyed by explosive pressure. In addition, the blast pressure dissipation device according to the present invention has notches 12 in the main plate 10 that closes the opening 6 of the tank body 1 to form plate pieces 13 that stand up due to an appropriate number of blast pressures. The main plate 1
Since it has an extremely simple structure in which it is closed with the tape 14 attached to at least one side of the main plate 10 and the tape 14, even large ones can be provided at low cost.
It has the advantage that it can be easily designed and manufactured regardless of the magnitude of the explosive pressure by simply changing the shape and size of the cutout 12.Furthermore, the tape 14 can be attached to both sides of the main plate 10 to close the notch 12. Therefore, even when positive pressure and negative pressure are applied alternately within the tank body 1, reliability during normal operation will be extremely high.

Note that the silo of the first embodiment has a wall thickness of 0.3
Main plate 1 made of mm stainless steel plate (SUS304)
A continuous notch 12 is provided in a U-shape as shown in FIG. The results of the burst pressure test using compressed air were as shown in FIG. 7, which was performed by closing the tube with a tape 14 made of a fluororesin having a wall thickness of 0.13 mm. As is clear from these results, the bursting pressure according to the present invention does not increase much even though the pressure rise rate increases, and it has been confirmed that the bursting responsiveness is extremely good.

Therefore, the present invention has great practical value as it eliminates the drawbacks of conventional explosive pressure dissipation devices.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing the first embodiment of the present invention, FIG. 2 is a partially cutaway front view of the main part,
FIG. 3 is a partially cutaway plan view of the main part, FIG. 4 is a partially enlarged view of FIG. 2, and FIG. 5 is a partially cutaway front view of the main part showing the second embodiment of the present invention. FIG. 6 is a partially cutaway plan view of the main part, and FIG. 7 is a graph showing the results of the burst pressure test. 1: Tank body, 10: Main plate, 12: Notch, 13: Appropriate number of plate pieces that stand up due to explosive pressure, 14: Tape.

Claims (1)

[Claims for Utility Model Registration] 1. An appropriate number of plate pieces 13 that are erected by explosive pressure are formed through notches 12 in the main plate 10 that closes required openings of the tank body 1, and the notches 12 are An explosive pressure dissipation device characterized in that a main plate 10 is closed with a tape 14 attached to at least one side. 2. The explosive pressure dissipation device according to claim 1, wherein the notch 12 provided in the main plate 10 is in the shape of a broken line. 3. The explosive pressure dissipation device according to claim 1 or 2, in which the tape 14 for closing the notch 12 is attached to both sides of the main plate 10.