JPH047397Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a pressure vessel lid suitable for sealing the lid of a pressure vessel in which liquid, gas, air, etc. compressed to a predetermined high pressure is stored. The present invention relates to a sealing device and a gasket used in the device.

(Prior art) Conventionally, this type of pressure vessel lid sealing device has a fourth
As shown in FIG. 5, the upper end flange 23 of the ring-shaped welding rule 21 welded to the upper end opening of the pressure vessel, and the periphery of the circular lid 22 that covers the welding rule 21. Sealing grooves 27 and 28 having a substantially semicircular cross section are provided in a ring shape in the circumferential direction on opposing surfaces of the parts, and a gasket is inserted between the upper end flange 23 of the rule 21 and the peripheral edge of the lid 22 during this welding. A sealing piece 3 having a substantially semicircular cross section is provided on the upper and lower surfaces of the main body 29.
A ring-shaped packing 24 in which numbers 0 and 31 are provided in a ring shape in the circumferential direction is inserted into each of the sealing grooves 27 and 28.
The upper end flange 23 of the rule 21 is interposed so that the upper and lower sealing pieces 30, 31 are fitted into the welding rule 21,
A pair of half-ring-shaped left and right clamps 25 and 26 are sandwiched between the peripheral edge of the lid 22 from the left and right sides, and both ends of each clamp 25 and 26 are tightened with a bolt 32 and a hexagonal nut 33. Ta.

(Problem to be solved by the invention) However, since sealing pieces 30 and 31 having a substantially semicircular cross section are provided in a ring shape in the circumferential direction on the upper and lower surfaces of the packing body 29 of the packing 24, the rule 21 is not applied to welding. A gasket 24 is interposed between the upper end flange 23 and the peripheral edge of the lid 22, and the upper and lower sealing pieces 30, 31 are inserted into the respective sealing grooves 27, 28, and the upper end flange 23 of the rule 21 is welded. When the clamps 25 and 26 are inserted into the peripheral edge of the lid 22 from the left and right sides, and both ends of the clamps 25 and 26 are tightened with the bolts 32 and hex nuts 33, the sealing pieces 30 of the gasket 24 are removed. , 31 are welded to each sealing groove 2 of the rule 21 and lid 22.
7 and 28, the working pressure strength was low, and there was a problem that liquid, gas, air, etc. in the pressure vessel were likely to leak. In addition, in order to prevent leakage of liquid, gas, air, etc. inside this pressure vessel,
Hexagon nuts 33 at both ends of each clamp 25, 26
must be strongly tightened with a monkey wrench, stress strain will occur in each clamp 25, 26, and there is a risk that the seal 24 may be damaged or each clamp 25, 26 may be plastically deformed. The durability of 25 and 26 was significantly reduced.

Therefore, the present invention was devised to solve the above-mentioned problems.It is an extremely easy operation that only involves lightly tightening the upper end flange of the welding rule and the periphery of the lid by hand. It is strong and can reliably prevent leakage of liquid, gas, air, etc. inside the pressure vessel, and also prevents damage to the seal or plastic deformation of each clamp, significantly increasing the durability of the seal and each clamp. The present invention provides an improved lid sealing device for a pressure vessel and a gasket used in the device.

(Means for Solving the Problems) In order to achieve the above-mentioned objects, the present invention includes an upper end flange of a ring-shaped welding ferrule that is welded to the upper end opening of the pressure vessel, and a ring-shaped welding ferrule that is welded to the upper end opening of the pressure vessel. A pair of half-ring-shaped left and right clamps are sandwiched from the left and right sides of the peripheral edge of the circular lid to be closed, and both ends of each clamp are tightened with bolts and tightening nuts such as eye nuts. In a lid sealing device for a pressure vessel, a sealing groove with a substantially semicircular cross section is provided in a ring shape in the circumferential direction on opposing surfaces of the upper end flange of the welding ferrule and the peripheral edge of the lid, and the upper end flange of the welding ferrule and A ring-shaped gasket, in which a self-sealing sealing piece with an approximately half-crescent cross section is provided in a ring shape in the circumferential direction on the upper and lower surfaces of the gasket body, is inserted between the upper and lower surfaces of the lid into each of the sealing grooves. A sealing piece is inserted between the two.

Furthermore, as a gasket used in a lid sealing device for a pressure vessel, a cross-sectional approximately half-crescent-shaped gasket is installed at the widthwise center of the top and bottom surfaces of the gasket body, which has a flat, rectangular, ring-shaped cross section. It is preferable that self-sealing sealing pieces are provided in a ring shape in a circumferential direction.

(Function) When the pressure vessel is sealed by the technical means described above, as the upper end flange of the welding ferrule and the peripheral edge of the lid are tightened, the corners of the upper and lower surfaces of the packing body of the packing are sealed. The tips of the pieces are gradually pressed against each other along the semicircumferential direction of the cross section of the corner sealing groove of the opposing surfaces of the upper end flange of the welding ferrule and the peripheral edge of the lid. Further, when tightening the upper end flange of the welding ferrule and the peripheral edge of the lid, it is only necessary to lightly tighten the knob of the tightening nut such as the eye nut of each clamp by hand. Furthermore, the sealing piece is interposed between the upper end flange of the welding ferrule and the peripheral edge of the lid so that the upper and lower sealing pieces of the sealing body are fitted into the respective sealing grooves, and the pair of left and right clamps are inserted into the left and right sides. By inserting and tightening the sealing piece, the tip of each sealing piece, which has an approximately crescent-shaped cross section on both the top and bottom surfaces of the seal body, will be aligned with the upper end flange of the welding ferrule and the cross section of each sealing groove on the periphery of the lid. Both are pressed together in a circumferential direction so that the cross section has a substantially full moon shape so that they are in close contact with each other.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

As shown in FIGS. 1 to 3, the pressure vessel lid sealing device of the present invention includes a ring-shaped welding ferrule 1 welded to the upper opening of the pressure vessel, and a lid closing device for the welding ferrule 1. a circular lid 2; a ring-shaped packing 4 interposed between the upper end flange 3 of the welding ferrule 1 and the peripheral edge of the lid 2;
It consists of an upper end flange 3 of the welding ferrule 1, and a pair of left and right half-ring-shaped clamps 5, 6 that are clamped onto the peripheral edge of the lid 2 from the left and right sides and tightened.

The welding ferrule 1 and the lid 2 are arranged at the opposing surfaces of the upper end flange 3 of the welding ferrule 1 and the peripheral edge of the lid 2, that is, at the center of the upper surface width direction of the upper end flange 3 of the welding ferrule 1, and Sealing grooves 7 and 8 each having a substantially semicircular cross section are formed in a ring shape in the circumferential direction on the peripheral edge of the lower surface of the lid 2 which faces each other when the lid is closed.

The packing 4 is made of silicone rubber containing red oxide to increase hardness, NBR, etc., and the packing main body 9, which has a flat square cross section and a ring shape, is provided at the widthwise center portions of the top and bottom surfaces of the packing body 9. Self-sealing (self-sealing) sealing pieces 10 and 11 each having a substantially crescent-shaped cross section are provided in a ring shape in the circumferential direction, and on the outer peripheral edge of the packing body 9, A fitting piece 12 fitted to the outer peripheral surface of the upper end flange 3 of the welding ferrule 1 is formed to protrude downward.

Further, the clamps 5 and 6 have the welding ferrule 1 on the inner peripheral surface of each half-ring-shaped clamp body 13.
A clamping groove 14 for clamping the upper end flange 3 and the peripheral edge of the lid 2 is recessed in the circumferential direction, and a collar 17 with a bolt hole 16 for inserting the bolt 15 is provided at both ends of each clamp body 13. Both flanges 17 of one clamp body 13 are provided with bolt head locking portions (not shown) on the bolt 15 insertion side to prevent idle rotation.

Then, a packing 4 is placed between the upper end flange 3 of the welding ferrule 1 formed as described above and the peripheral edge of the lid 2, and a packing main body 9 is placed in each sealing groove 7, 8.
The upper and lower sealing pieces 10 and 11 of the welding ferrule 1 are fitted, and the fitting piece 12 on the outer periphery of the packing body 9 is interposed so as to be fitted to the outer peripheral surface of the upper end flange 3. After inserting the clamp grooves 14 of the left and right pair of clamps 5 and 6 into the peripheral edge of the lid 2 from the left and right sides, the flanges 1 at both ends of one clamp 5 are inserted.
Insert the bolts 15 from the bolt holes 16 side of 7, respectively, and insert the bolts 15 into the bolt holes 1 of the collar 17 at both ends of the other clamp 6.
Eye nut with ring 18 on side 6, knob nut,
Each is tightened with a tightening nut 19 such as a wing nut.

(Effects of the Invention) As described above, the present invention includes the upper end flange 3 of the ring-shaped welding ferrule 1 welded to the upper end opening of the pressure vessel, and the circular lid 2 covered with the welding ferrule 1. A pair of half-ring-shaped left and right clamps 5 and 6 are sandwiched between the peripheral edges of the left and right sides, and both ends of each clamp 5 and 6 are tightened with a bolt 15 and a tightening nut 19 such as an eye nut. In a container lid sealing device, sealing grooves 7 and 8 having a substantially semicircular cross section are provided in a ring shape in the circumferential direction on opposing surfaces of the upper end flange 3 of the welding ferrule 1 and the peripheral edge of the lid 2. Between the upper end flange 3 of the ferrule 1 and the peripheral edge of the lid 2, self-sealing sealing pieces 10 and 11 having a substantially half-crescent shape in cross section are provided in a ring shape in the circumferential direction on the upper and lower surfaces of the packing body 9. Since the ring-shaped gasket 4 is arranged so that the upper and lower sealing pieces 10, 11 are inserted into the respective sealing grooves 7, 8, when sealing the pressure vessel, the sealing grooves 7, 8 are arranged so that the sealing pieces 10, 11 are inserted into the sealing grooves 7, 8. welding ferrule 1
As the upper end flange 3 and the peripheral edge of the lid 2 are tightened, the tips of the sealing pieces 10 and 11 on the upper and lower surfaces of the gasket body 9 of the gasket 4 will tighten between the upper end flange 3 of the welding ferrule 1 and the peripheral edge of the lid 2. Since the sealing grooves 7 and 8 are gradually pressed together along the semicircumferential direction of the cross section of each sealing groove 7 and 8 on the surface facing the peripheral edge, the upper end flange 3 of the welding ferrule 1 and the peripheral edge of the lid 2 are only lightly tightened. It is easy to operate, has strong operating pressure strength, and can reliably prevent leakage of liquid, gas, air, etc. inside the pressure vessel. Moreover, since it is only necessary to lightly tighten the upper end flange 3 of the welding ferrule 1 and the peripheral edge of the lid 2, the hexagonal nuts 33 at both ends of each clamp 25, 26 are strongly tightened with a monkey wrench as in the conventional method. Breakage of the packing 4 or plastic deformation of each clamp 5, 6 can be prevented without causing stress strain on the packing 4, 26, and the durability of the packing 4 and each clamp 5, 6 can be significantly improved.

In addition, a pair of half-ring-shaped left and right clamps 5 and 6 are sandwiched between the upper end flange 3 of the welding ferrule 1 and the peripheral edge of the lid 2 from the left and right sides, and each clamp 5,
Since both ends of the clamps 25 and 6 are tightened with bolts 15 and tightening nuts 19 such as eye nuts, when tightening the upper end flange 3 of the welding ferrule 1 and the peripheral edge of the lid 2, each clamp 25,
26, the upper end flange 3 of the welding ferrule 1 and The operation of tightening the peripheral edge of the lid 2 is extremely easy. In this case, tightening nut 19
If an eye nut is used as the eye nut, a long rod can be inserted into the ring 18 of the eye nut and tightened tightly, which is convenient as a spare.

Further, as the gasket 4, a self-sealing sealing piece having a substantially half-crescent shape in cross section is installed at the widthwise center of the top and bottom surfaces of the gasket body 9, which has a flat rectangular and ring-shaped cross section. 10 and 11 are formed so as to protrude in a ring shape in the circumferential direction, so that the upper and lower sealing pieces 10 and 11 of the packing body 9 are provided between the upper end flange 3 of the welding ferrule 1 and the peripheral edge of the lid 2. are inserted into the sealing grooves 7 and 8, and the left and right pair of clamps 5 and 6 are sandwiched and tightened from the left and right sides, thereby sealing the upper and lower surfaces of the gasket main body 9 as shown by the dashed lines in FIG. The tips of the sealing pieces 10 and 11, which have a substantially crescent-shaped cross section on both sides, are connected to the upper end flange 3 of the welding ferrule 1 and the sealing grooves 7 on the peripheral edge of the lid 2, as shown by solid lines in FIG. , 8 are in close contact with each other in a semi-circumferential direction so that their cross sections form a substantially full-moon shape. Even if leakage occurs into each sealing groove 7, 8 from the inside of the packing body 9 between the periphery, each sealing piece 1
Liquid, gas, and liquid in the pressure vessel with the apex of 0.11.
Leakage of air, etc. can be reliably prevented.

According to measurement results that support this effect, by simply lightly tightening the upper end flange 3 of the welding ferrule 1 and the peripheral edge of the lid 2, the maximum working pressure required by the pressure vessel structure regulation standard can be increased to 7.0 kg/cm ² . A strength of 8.41Kg/cm ² , which far exceeded that of the previous model, was obtained. In this case, not only was there no leakage of liquid, gas, air, etc. inside the pressure vessel, but there was also no damage to the packing 4 or plastic deformation of the clamps 5 and 6.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of the present invention; Figure 1 is an exploded perspective view, Figure 2 is a perspective view of the assembled state, and Figure 3 is an enlarged longitudinal section of the main part of Figure 2. The plan view, FIGS. 4 and 5 show a conventional example, and FIG. 4 is an exploded perspective view, and FIG. 5 is an enlarged vertical sectional view of the main part in an assembled state. 1... Welding ferrule, 2... Lid, 3... Flange, 4... Packing, 5... Clamp, 6... Clamp, 7... Sealing groove, 8... Sealing groove, 9... Packing body, 10 ... Sealing piece, 11... Sealing piece,
12... Fitting piece, 13... Clamp body, 14...
...Pinch groove, 15...Bolt, 16...Bolt hole,
17... Tsuba, 18... Ring, 19... Tightening nut.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A semi-ring shaped upper end flange of a ring-shaped welding ferrule to be welded to the upper end opening of a pressure vessel, and a peripheral edge of a circular lid to be attached to this welding ferrule. In a pressure vessel lid sealing device that consists of a pair of left and right clamps sandwiched from the left and right sides and both ends of each clamp tightened with bolts and tightening nuts such as eye nuts, the upper end flange and lid of the rule are welded together. A sealing groove with a substantially semicircular cross section is provided in a ring shape in the circumferential direction on the surface opposite to the peripheral edge of the sealing groove, and the upper and lower surfaces of the gasket body are welded between the upper end flange of the rule and the peripheral edge of the lid. A ring-shaped gasket, in which a self-sealing sealing piece having a substantially half-crescent shape in cross section is provided in a ring shape in the circumferential direction, is interposed in each of the sealing grooves so that the upper and lower sealing pieces are fitted into each of the sealing grooves. Lid sealing device for pressure vessels. 2. A self-sealing sealing piece with an approximately semi-crescent cross section is attached to the center of the upper and lower surfaces of the packing body, which has a flat rectangular and ring-shaped cross section in the width direction, in the circumferential direction. A gasket used for a lid sealing device for a pressure vessel, characterized by having a protruding shape.