RU2248483C1 - Reservoir hatch closure - Google Patents

Abstract

FIELD: transportation of radioactive and toxic materials.

SUBSTANCE: proposed closure contains upper and lower flanges rigidly connected by axle, seal, spring-vacuum device and floating disk. Spring thrust ring found on outer belt of floating disk gets into ring slot of hatch. Said thrust ring has conical inner surface in contact with conical surface of floating disk, and end face surface in contact with seal placed in ring slot between upper flange and floating disk. Spring thrust ring is furnished with at least three tenons getting with clearance into mating holes of floating disk. Two longitudinal cylindrical holes are made in axle, said holes being conjugated with conical surface. Conical shutoff valve and pressure spring are fitted in larger diameter upper hole. Lower hole of smaller diameter is intersected with cross through hole made in lower part of axle. Through hole of diameter smaller than inner diameter of pressure spring is made along vertical axis of symmetry of upper flange. Removable vacuum suction head and permanent magnet with ribbed support surface secured on vacuum suction head by means of spring from its inner side are installed on central part of upper flange.

EFFECT: prevention of unauthorized access to radioactive or toxic materials carried in or temporary stored in containers with proposed closure, improved sealing of containers.

2 cl, 3 dwg

Description

The invention relates to the field of transportation of radioactive and toxic substances and can be used in the design and manufacture of closures of hatches of containers or means for sealing shutters, pressed using springs and elastic elements.

Known technical solution according to RU 2215921, M. Cl. 7: F 16 J 13/12, publ. November 10, 2003, “Extractor shutter”.

The known shutter comprises a lid located in the neck of the housing with the possibility of limited reciprocating movement, made in the form of a flat disk disk fixed on a guide rod, on which rings made in the form of two elastic concentric - rubber and fluoroplastic rings are installed, an annular gasket in contact with the support washer . A snap ring is fixed on the guide rod, restricting the movement of the cover by A. The guide rod is located in the central hole of the outer cover mounted on the neck of the housing using a threaded connection. The inlet and outlet fittings are made in the housing.

The shutter operation of the extractor is as follows.

The outlet fitting is preliminarily closed, raw materials are loaded into the housing, a cover with an annular gasket and a supporting washer is placed in the neck of the housing. The outer cover is tightly closed, while a flat disk disk with rubber and fluoroplastic rings placed on it and a support washer are lowered into the housing by an amount A to the stop of the retaining ring in the outer cover. Then, gas is supplied through the inlet fitting, under the influence of high pressure of the supplied gas, the flat disk-shaped disk rises up by the value A, compresses the rubber ring, which radially expands and acts on the persistent fluoroplastic ring, presses it against the body. The extractor shutter is sealed between the housing and the support washer, which provides sealing.

A disadvantage of the known shutter is the possibility of its unauthorized opening, which makes it impossible to use the known device in containers designed for transporting radioactive and toxic substances.

A technical solution is known according to A.S. SU 1537937, M. Cl. 5: F 16 J 13/00, publ. 01/23/90, “Sealed cover” selected by the applicant as a prototype.

According to the known technical solution, a sealed cover is installed in the housing of the pressure vessel and performs the function of shuttering the hatch of the tank. The tight cover contains the upper and lower flanges connected by an axis, a seal, a spring device. In addition, it further comprises a locking and intermediate discs, a threaded pin. A stepped groove is made in the lid case in the form of conical and cylindrical sections, respectively, the locking disk is made in the form of an elastic ring with ring grooves on its inner and outer diameters, respectively. The spring device is made in the form of a disk spring disk mounted in the annular groove of the elastic ring. A mechanical seal is installed in the head of the threaded pin. The elastic ring is located in the area of the cylindrical section, and the intermediate disk is mounted on the upper plane of the elastic ring and is located between the last and upper flange.

A disadvantage of the known technical solution is the possibility of unauthorized opening of a sealed lid, which makes it impossible to use the known device in containers intended for transporting radioactive and toxic substances.

The technical result of the invention is the elimination of these disadvantages of the prototype, namely the elimination of the possibility of unauthorized access to radioactive or toxic substances transported or temporarily stored in containers equipped with the inventive shutter of the hatch, as well as increasing the tightness of these containers.

The technical result is achieved by the fact that in the shutter of the tank hatch containing the upper and lower flanges connected by an axis, a seal, a spring device, according to the invention, the upper and lower flanges are rigidly connected by an axis, a spring-vacuum device is used as a spring, the shutter is equipped with a floating disk, the outer belt of which is placed in the annular groove of the hatch spring thrust ring having a conical inner surface in contact with the conical surface of the floating disc, and the end surface, to contacting with a seal located in the annular groove between the upper flange and the floating disk, the spring thrust ring is provided with at least three spikes that enter into the mating holes of the floating disk with a gap, two longitudinal cylindrical holes mating with a conical surface are made in the axis, in the upper hole with a large diameter has a conical shut-off valve and a clamping spring, the lower hole with a smaller diameter intersects with a transverse through hole made in the lower part of the axis, along a vertical hole of symmetry of the upper flange has a through hole with a diameter smaller than the inner diameter of the clamping spring; a removable vacuum suction cup and a permanent magnet with corrugations on the supporting surface are attached to the central part of the upper flange and attached to the vacuum suction cup on the inside with a spring.

In addition, in the shutter of the tank hatch, the upper flange is made of non-magnetic steel.

The essence of the proposed technical solution is illustrated by drawings.

Figure 1 shows the main view of the shutter, combined with a cut by its frontal plane. Figure 2 shows a cross section of a shut-off valve. Figure 3 shows a local breakout in figure 1. The shutter of the tank hatch contains parallel flanges: the upper 1, made of non-magnetic steel, and the lower 2. Flanges 1 and 2 are rigidly connected by the axis 3. In the axis 3 there are two cylindrical holes conjugated by a conical surface. A hole with a smaller diameter intersects with a transverse through hole made in the lower part of the axis 3. Before welding the axis 3 to the flange 1, a shut-off valve 4 and a compression spring 5 are pre-installed in it. Before welding to the axis 3 of the flange 2, the belt 6 of the upper flange 1 is installed a sealing element 7, then a floating disk 8 is installed on the axis 3 with a spring thrust ring 9 with spikes 10 mounted on its conical surface, and a disk spring 11 is attached to the rim of the flange 2 and a sealing membrane 12.

After installing the shutter in the hatch 13 of the tank with an uncompressed sealing element 7, the upper end of the ring 9 is located below the upper edge of the annular groove 14 made in the hatch of the tank.

At the time of opening the hatch of the tank, a vacuum suction cup 15 and a permanent magnet 16 with corrugations are mounted on the top flange 1 of the shutter on a supporting surface attached to the vacuum suction cup from its inner side by means of a compression spring 17.

For communication of the vacuum cavity 18, concluded between the lower flange 2 and the sealing membrane 12 with the cavity of the vacuum suction cup 15 through the cavity for the valve 4 in the upper flange 1, a hole 19 is made.

The shutter of the tank hatch operates as follows. A suction cup 15 with a magnet 16 is mounted on the surface of the flange 1, and they are pressed against the surface of the flange. Under the action of magnetic forces, the shutoff valve 4 rises up, compressing the spring 5. As a result, the cavity 18 communicates with the cavity of the vacuum suction cup. The cavity of the vacuum suction cup 15 is connected to the vacuum line, as a result of which the suction cup 15 is firmly attached to the surface of the flange 1, and a vacuum is created in the cavity 18. The Belleville spring 11 is compressed by the action of the membrane 12, removing the pressure of the floating disk 8 against the sealing element 7. The spring thrust ring 9 slides along its conical surface while the floating disk 8 is moving downward, being compressed and held onto the floating disk by means of spikes 10.

In this state, the shutter is installed in the tank hatch. Then the suction cup 15 is disconnected from the vacuum line and connected to the atmosphere, as a result of which the cavity 18 is filled with air. The disk spring 11 through the sealing membrane 12 acts on the floating disk 8, which as a result moves towards the upper flange 1, compressing the sealing element 7, which, due to radial deformation, seals the hatch 13 of the tank. The spring thrust ring 9, in contact with the conical surface of the floating disk 8 and the seal 7, increases in diameter and enters the ring groove 14 until it stops, firmly fixing the position of the shutter in the hatch.

Vacuum suction cup 15 with magnet 16 is removed. The shutoff valve 4 under the action of the spring 5 ensures the disconnection of the vacuum cavity 18 with the cavity of the hole 19.

In this state, it is impossible to open the tank hatch without the use of special devices. A spring thrust ring fixes the position of the shutter in the hatch and prevents its opening during vibration and shock. In addition, its use increases the area of the sealing surfaces.

Opening the tank hatch is in the reverse order.

Claims (2)

1. The shutter of the tank hatch containing the upper and lower flanges connected by an axis, a seal, a spring device, characterized in that the upper and lower flanges are rigidly connected by an axis, a spring-vacuum device is used as a spring, the shutter is equipped with a floating disk, on the outer belt of which placed in the annular groove of the hatch, the spring thrust ring having a conical inner surface in contact with the conical surface of the floating disc, and an end surface in contact with the seal placed in a groove between the upper flange and the floating disk, the spring thrust ring is provided with at least three spikes that enter into the mating holes of the floating disk with a gap, two longitudinal cylindrical holes are made in the axis, mating with a conical surface, a conical in the upper hole with a large diameter shut-off valve and pressure spring, the lower hole with a smaller diameter intersects with a transverse through hole made in the lower part of the axis, along the vertical axis of symmetry of the upper flange a through hole was made with a diameter smaller than the inner diameter of the clamping spring, a removable vacuum suction cup and a permanent magnet with corrugations on the supporting surface attached to the vacuum suction cup from the inside using a spring were installed on the central part of the upper flange. 2. The shutter of the tank hatch according to claim 1, characterized in that the upper flange is made of non-magnetic steel.

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