JPH0535237Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] A clutch type is a quick opening/closing lid device for pressure vessels that is widely used in various industries including the chemical industry and the food industry.

In recent years, the number of pressure vessels used for high-pressure experiments and other applications at high pressure or ultra-high pressure, and whose lids are frequently opened and closed, has been increasing.

The present invention provides an inner lid clutch type opening/closing lid with an automatic position setting function, a smooth rotation function, and a radial movement prevention function.

[Prior art] Fig. 3 shows an inner lid clutch type opening/closing lid device in which a generally used claw clutch type lid is inserted inside the body (published by Shinnihon Hoki Publishing Co., Ltd., High Pressure Gas Control Ordinance) Regulations/Specific Equipment Inspection Regulations No. 12
(See Article 754-94-7). The lid 1 has claws 5 cut on its outer periphery. In this figure, there are four claws 5.

Further, the lid 1 is provided with a hanging and rotating metal fitting 3 as shown in the figure. The body 2 has claws 6 as shown.
Furthermore, an annular groove 7 is provided at a position corresponding to the claw 5 of the lid.

In this device, we will first describe the operation of setting the lid onto the barrel.

It was carried by a crane with a rope attached to the metal fitting 3 of the lid, and carefully and quietly lowered into the shell to the position shown in the figure.
While maintaining the gap 8 shown in the diagram while hanging,
When you rotate the lid by 45 degrees, the claws 5 and 6 will appear as shown.
are in a state of engagement. When rotating by 45 degrees, the gap 8 is extremely small (δ≒1.0mm), so careful work is required to prevent the crane from moving up and down, and to prevent the ends of claws 5 and 6 from colliding and causing damage. If the work is large, three or four workers are required. Also, there are gaps 9 and 13 on the outer periphery of the lid, and the work must be done extremely carefully so that the lid does not move to one side and damage the sealing material 4 (it is necessary to hold the gaps 13 on both sides). And it requires skill.

Once the lid is set in place (as shown), operate by applying internal pressure (for example, 1500 kg/cm ² G), then reduce the pressure to atmospheric pressure, and then remove the lid in the reverse order of the above. It is something to do.

By the way, the specifications of the container are as follows.

Container effective dimensions: Inner diameter 500mm x Inner height 1000mm Container structure: Forged integral ring type container Material: JIS SNCM-439 Maximum working pressure: 1500Kgf/ ^cm2G Test pressure: 1800Kgf/ ^cm2G Lid type : Inner lid clutch type lid Opening/closing: Manual opening/closing High pressure Seal: O-ring Body plate thickness: 200mm Body weight: Approx. 8TON Lid plate thickness: 200mm Lid weight: Approx. 1.5TON [Problems the invention aims to solve] ] As mentioned above, the conventional technology has the following problems.

When setting the lid, it is extremely difficult to maintain the gap 13 evenly around the entire circumference, and the work is time consuming and the accuracy is poor, resulting in variations in sealing performance and the risk of leakage of contents. There is.

The time required to open and close the lid is approximately 1 hour in this example.

When rotating the lid while suspended in the air with a crane, 3 to 4 workers are required, the lid is large and heavy, and the gap 8 is narrow (δ≒1.0
mm), and the work must be done carefully to avoid damage due to collision between the ends of the claws 5 and 6, which is undesirable from a safety standpoint, as the work is suspended in the air and takes a long time. Furthermore, if the lid is placed and rotated without being suspended in the air by a crane, it is necessary to slide it face to face, which requires a large amount of torque, and radial movement occurs on either side during rotation, causing problems in sealing performance.

[Means for Solving the Problems] The present invention is an inner lid clutch type opening/closing lid device for a pressure vessel, in which a stepped portion that supports the weight of the lid is formed on the inner surface of the end of the body, and a spherical groove and a groove are formed in the stepped portion. A tapered annular pedestal is provided on both sides of the holder, a plurality of rotatable spheres are arranged in the spherical groove, and a spherical groove with tapers on both sides is formed in an annular shape on the lid surface facing the spheres. It features a clutch-type quick opening/closing lid device.

[Operation] In this invention, when the lid is lowered by a crane or the like, the tapered part of the tapered spherical groove at the bottom of the lid hits the freely rotating sphere and uses it as a guide, causing the lid to fall while moving in the radial direction. Moreover, the structure is such that it can be automatically adjusted to a predetermined position by rotating the sphere.

Thereafter, when the lid is rotated, the freely rotatable sphere rotates with extremely small torque, allowing the circumferential direction to be set smoothly. Furthermore, even if internal pressure is applied repeatedly, radial movement is automatically prevented or adjusted by the taper and spherical contact portion.

[Example] Fig. 1 shows an overall view of an example device of the present invention,
A is a plan view of the device, and B is a longitudinal side view.

The lid 1 is loaded into the shell 2, and the procedure of gradually lowering it with a crane via the hanging bracket 3 is the same as in the conventional technology, but the lid 1 has a circular tapered spherical groove 10 as shown. It is arranged in a circumferential manner. Further, on the abutment surface of the barrel opposite to the tapered spherical groove 10 of the lid, there is an annular pedestal 12 having a spherical groove and tapers on both sides, and a plurality of spheres 11 arranged on the circumference thereof.

FIG. 2A is an enlarged view thereof.

Now, to explain the behavior when the lid is lowered by a crane, using FIG. Since the tapered part of the lid and the sphere 11 come into contact with each other and the sphere rotates in the direction 14 in the figure, the tapered part of the lid moves in the direction 15 in the figure by its own weight. Therefore, their center lines will coincide with each other.

Therefore, after reaching the state shown in FIG. 2A, it is necessary to rotate the lid by 45 degrees in order to hang it on the nail, but the sphere 11 allows rotation with extremely small torque.
At this time, movement in the radial direction is prevented by the radial movement preventing effect of the taper of the base 12 and the taper of the lid, and the radial movement preventing effect of the sphere and the spherical groove.

[Effects of the invention] By employing the above-mentioned configuration, the present invention provides the following effects.

When lowering the lid with a crane, one person can lower the lid by operating the crane's buttons, and the positioning can be done automatically.

The lid can be rotated by one person with a small amount of force.

Since the position of the lid can be automatically adjusted with high precision without moving in the radial direction, variations in sealing performance are eliminated and a good seal can be achieved.

Since operations are done in batches, it was effective to reduce the time required to open and close the lid to increase the operating rate, but by using the device of this invention, this time can be reduced to about 1/3 of the conventional time.

Can be extensively automated.

In other words, when the lid is loaded into the shell with a crane,
As with the device of the present invention, the position can be automatically set in the radial direction. Then, when the lifting tool is pushed hydraulically, it easily rotates 45 degrees, allowing the specified work to be performed using mechanical power.

[Brief explanation of the drawing]

Fig. 1 is an overall view of an embodiment of the device of the present invention, A is a plan view, B is a vertical side view, Fig. 2 A is an enlarged view of the self-aligning mechanism, B is an explanatory diagram of behavior when loading the lid, FIG. 3 is an overall view of an example of a conventional device, in which A is a plan view and B is a longitudinal side view. 1... Lid, 2... Body, 3... Hanging tool, 4... Sealing material, 5... Lid side claw, 9... Body side claw, 7... Annular groove, 8... Gap (upper and lower), 9... Gap (radial direction),
10... Tapered spherical groove, 11... Sphere, 12
... Pedestal, 13 ... Gap (radial direction), 14 ... Rotation direction of sphere, 15 ... Direction of movement of lid taper.

Claims (1)

[Scope of utility model registration request] In an inner lid clutch-type opening/closing lid device for a pressure vessel, a stepped portion is formed on the inner surface of the end of the body to support the weight of the lid,
A spherical groove and a circular pedestal having tapers on both sides of the groove are provided in the stepped portion, a plurality of rotatable spheres are arranged in the spherical groove, and a spherical groove with tapered sides on both sides is provided on the lid surface facing the sphere. A clutch type quick opening/closing lid device characterized by having an annular shape.