JPS587199Y2 - Explosive pressure relief lid braking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an explosion relief lid braking device that is attached to a conduit, vessel, or the like.

It is well known that the lid of an explosion relief lid device is used as a safety valve in equipment filled with gas or dust where an explosion or explosive heat may occur.

Due to the sudden pressure increase caused by the explosion or deflagration, the lid opens very quickly, so that the overpressure gas immediately dissipates into the atmosphere.

After the normal operating pressure has been restored, the lid closes again with the aid of the clamping spring pressurizing it.

This type of known relief lid device is equipped with a braking device in addition to the pressing spring for the relief lid, and the braking device for the braking device may be one that uses a spring or one that uses an air cylinder. It consists of

However, all of these have complicated structures and are expensive, and the former has drawbacks such as being easily deformed by pressure and poor corrosion resistance, while the latter has drawbacks such as being difficult to adjust.

The purpose of this invention is to eliminate the drawbacks of conventional brakes as described above, and to provide a braking device that is simple in structure, inexpensive, has excellent durability, and does not require special adjustment work, This is achieved by what is stated in the claims for utility model registration.

Embodiments of this invention will be described in detail below with reference to the drawings.

The relief lid braking device shown in the drawings has an intermediate flange 1 and a lid body 2 which is hermetically pressed onto the intermediate flange 1 by a pressure spring 3.

The lid body 2 is supported by a plurality of guide bars 7 equally divided near the periphery.
The threaded portion 9 at the tip of the hole 8 of the lid body 2 is threaded into the corresponding threaded hole 11 of the intermediate flange 1, and passes through the through hole provided in the mounting flange 35 of the conduit 34. It is screwed with a tightening nut 10.

The relief lid braking device has a plurality of (7JI) placed near the circumference.
A threaded portion 25 at the tip of the bolt 21 passes through the hole 22.23 of the lid 2 and the intermediate flange 1, and is screwed into the mounting flange 35 of the conduit 34 with a nut 26. The bolt 21 includes a fan-shaped portion 24 supported by the intermediate flange 1.

A plurality of brake discs 27 made of highly elastic and pressure-resistant synthetic resin are removably attached to the other end of the brake bolt 21. In this case, in order to transmit equal force to the brake discs, the adjacent two Steel rings 28 are inserted one by one between the brake discs, and these brake discs 27 and steel rings 28
is fixed by the fan-shaped portion 29 of the brake bolt 21 and a nut 30 disposed at the outer tip thereof.

In the above-mentioned device, a plate gasket ring 36 is inserted between the flanges 1 and 35, and the flange 1 is provided with an annular groove 5, and the backing ring 4 is fitted into this groove 5 to release the button. A sealing effect is achieved by the ring 4 being engaged with the annular projection 6 of the lid body 2, and 37 indicates a washer.

Further, the pressing spring 3 is attached to the guide bar 7 and supported by the spring receiver 12, 13, the guide sleeve 14, and the guide tube 15.

The tension of the pressure spring 3 is determined by the threaded portion 17 and the nuts 18, 19 .
20, and can be adjusted by a threaded portion 16 provided at the outer tip of the guide bar 7.

Furthermore, one of the brake bolts 21 is arranged on an extension thereof, and one end thereof is attached to a marking rod 31 attached to a nut 30.
It is provided with three marking symbols 32 corresponding to the three different opening pressures of the relief lid.

The marking symbol part of the marking rod 31 is inserted into a through hole bored in a ring disc 33 supported by a guide bolt 7, and this ring disc 33 is fitted with a screw for adjusting the tension of the pressing spring 3. By operating the tool 16, it moves back and forth along the indicator rod 31.

In the above embodiment, the lid body 2 has a flat plate shape, but it may also be formed in an arch shape, for example, a rounded truncated cone shape.

In the above, when a sudden pressure rise occurs in the conduit 34, the lid 2 separates from the flange 1 and moves to the left in FIG. 1 to open, and its movement is stopped by the brake disc 27.

This idea is as described above, and the braking device has one end attached to a flange of a conduit, etc., and a braking plate made of a synthetic resin with high elasticity and pressure resistance attached to the other end of a plurality of braking bolts. Since it is attached removably,
In addition to its extremely simple structure and low cost, it has excellent corrosion resistance and does not require particularly troublesome adjustment operations.Furthermore, when replacing or repairing the brake disc, it is easy to remove the nuts. It has the effect of being able to be removed from the brake bolt, and in addition, in the case of a steel ring inserted between each brake disc, pressure is uniformly applied to each part of the brake disc, causing distortion of the brake disc. It also has an effect that is not present.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view of an embodiment of this invention, and FIG. 2 is a left side view of the same. 1.35: Flange, 2: Lid, 3: Spring, 21: Braking bolt, 22, 23: Hole, 24: Fan-shaped part, 25: Threaded part, 26: Nut, 27: Braking plate, 28: Steel ring ,2
9: sector, 30: nut, 34: conduit.

Claims (1)

[Scope of Claim for Utility Model Registration] ■ An explosive pressure relief lid braking device comprising a lid that is directed toward a flange of a conduit, etc. and is pressed by a spring, and a brake for the lid; The braking device has a braking bolt 21, one end of which passes through a plurality of holes 8 near the periphery of the lid body 2 and is attached to the flange, and a braking bolt 21 that is made of a highly elastic and pressure-resistant synthetic resin and has the other end attached to the flange. Natsuto 30 on board 27
An explosive pressure relief lid braking device characterized in that it consists of a device that is detachably attached to the device. 2. Utility model registration claim IJm Q explosion pressure relief lid braking device, in which there are a plurality of brake discs 27, and one steel ring 28 is inserted between two adjacent brake discs 27. 3. The explosion pressure relief cover braking device according to claim i or 2, wherein the brake disc 27 is held by the shoulder 29 of the brake bolt 21 on the opposite side of the nut 30.