JPS587198Y2 - Overpressure release hatch - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a filtration pressure relief hatch provided in a tank to improve the safety of the tank.

In gas and liquid tanks, such as oil storage tanks, when gas or liquid pressure that causes a certain pressure in the tank is applied, this abnormal pressure is automatically released to the outside, and overpressure is applied to minimize damage. Open: Sochi lid can be attached.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

Reference numeral 1 denotes an opening (hatch) formed at the top of the tank body wall 2, and a flange 4 is provided at the upper end of the coaming 3.

A peripheral portion of a cover plate 60 is attached to the flange 4 via an annular hack 5 in an air-tight or liquid-tight manner.

T is the bottom for cover plate coverage.

In this embodiment, by using the cover plate 6 made of reinforced glass, the cover sheet is made to have strong static strength and weak impact force characteristics.

When the tank internal pressure is at a normal value, this internal pressure acts in a direction to push up the cover plate 6, but the strength is set to such a degree that the cover plate 6 will not be destroyed under such normal internal pressure.

8 is a cylinder having a built-in piston body 9, and a lower chamber (pressure chamber) 10 partitioned by the piston body 9 is connected to the connecting pipe 1.
1 communicates with the inside of the hatch coaming 3.

Therefore, the tank internal pressure acts on the piston body 9 at all times.

Reference numeral 12 denotes a spring that urges the piston body 9 against the tank internal pressure, and this spring 12
'? : It is installed internally and its biasing force can be increased or decreased as desired by the adjustment screw 14.

When the tank internal pressure is normal, the piston body 9 is held in a neutral position by the tank internal pressure and the biasing force of the spring 12, but when the tank internal pressure becomes excessive pressure, the spring 12 is It is pushed upward and displaced against the urging force of.

The set pressure when the piston body 9 is displaced is determined by the adjustment screw 14.
can be easily adjusted to any value by

The piston body 9 has a lifting rod 15 extending upward from the cylinder 8.
is provided protrudingly, and a hinge 1 is provided at the upper end of this elevating rod 15.
A link 17 is connected via a link 6 so as to maintain a horizontal position at all times, and an arcuate engaging pawl 18 is attached to the tip of the link 17 via a hinge 19.

Both left and right ends of the engaging claw 18 are supported by bearings (not shown).

This pivot support shall be provided if necessary.

Reference numeral 20 denotes a post erected on the side of the opening 1, and an intermediate portion near the base end of the swing arm 21 is pivotally supported at the top of the post 20 by a horizontal pin 22.

At the tip of the swinging arm 21, there is a weight 2 whose tip has an edge shape.
3 is suspended by a pin 24.

Further, a horizontal rod 25 is provided at the base end of the swing arm 21, and the engaging claw 18 is engaged with this horizontal rod 25.

In this state, the weight 23 is supported above the cover plate 6.

The swing arm 21, the horizontal rod 25, the engaging claw 18,
The link 17 and the lifting rod 15 constitute a support.

A wire net 26 is stretched in the lower part of the hatch coaming 3.

If excessive pressure exceeding the predetermined pressure occurs in the tank for some reason on the ground, the piston body 9
is pushed up and displaced against the bias of the spring 12.

As the elevating rod 15 rises due to the displacement of the piston body 9, the engaging pawl 18 rotates by a certain angle at that position via the link 17.

By rotating the engaging claw 18, the notch 18A of the engaging claw 1-8
is located at the top.

Therefore, the horizontal rod 25, which is urged upward by the weight of the weight 23, is pulled out from the notch 18A, and the swing arm 21
swings around the horizontal pin 22, and the weight 23 falls onto the cover plate 6.

The weight 23 is pre-positioned to fall onto the center of the cover plate 6.

The cover plate 6 is crushed by the impact force caused by the falling weight 23, and the fragments are collected on the wire net 26.

By crushing the cover plate 6, the opening 1 is fully opened and excessive pressure is released to the outside.

In this embodiment, the tip of the weight 23 has an edge shape, and when excessive pressure is generated, the cover plate 6 made of tempered glass
Since the weight 23 falls into the center of the cover plate 6
is easily destroyed and can reliably release excess pressure to the outside.

And the fragments of the cover plate 6 are not dispersed into the tank.
Since they are collected on the wire net 26, the operation when newly attaching the cover plate 6 can be performed quickly and easily.

As is clear from the above explanation, according to the present invention, when excessive pressure occurs inside the tank, the opening can be reliably opened and the excessive pressure can be released to the outside, so that damage can be minimized. Furthermore, since the weight that destroys the cover plate is configured so that its supported state is released by the displacement of the piston body, the force that destroys the cover plate, that is, the weight of the weight, can be freely changed, and therefore, various It can be applied to tanks, and since the natural fall of the weight is used to destroy the cover plate, the overall structure can be made extremely simple.

In the embodiment, a case has been described in which the cylinder 8 is supported by the tank body wall 2, but the cylinder 8 is not limited to this, and the cylinder 8 may be provided at any location.

For example, it may be provided on the cover plate 6.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention. FIGS. 1 and 3 are longitudinal sectional side views, and FIG. 2 is a plan view of the main parts. DESCRIPTION OF SYMBOLS 1... Opening, 5... Packing, 6... Cover plate, 8... Cylinder, 9... Piston body, 10...
...Pressure chamber, 11...Connecting pipe, 12...Spring, 14
...adjustment lever 15...lifting rod, 17...link,
18... Engaging claw, 21... Swinging arm, 23...
Weight, 25... horizontal rod.

Claims (1)

[Scope of utility model registration request] It has a cover plate that seals the tank opening, a weight that falls onto the cover plate and destroys it, a support that supports the weight above the cover plate, and a piston body that is displaced by the action of excessive pressure inside the tank. , an overpressure release device characterized in that the state in which the weight is supported by the support device is released by displacement of the piston body.