JPH0635901Y2 - Hatch cover for tank cleaning hatch - Google Patents

Description

[Detailed description of the device] [Industrial applications]

This idea is to open the so-called hatch cover of the tank cleaning hatch provided on the upper deck when cleaning the tanks of chemical tankers and product tankers engaged in the transportation of bulk chemical liquids, refined petroleum oils and animal and vegetable oils. The present invention relates to an opening hatch cover for loading a tank cleaning machine.

[Prior art]

Conventionally, a device of this type has been shown in FIG.
A hole having a diameter of 300 to 400 mm is made in the hole, and a circular tube-shaped hatch combing 9 corresponding to the diameter is erected and the hatch combing 9 is formed.
Is welded to the upper deck 10, a collar-shaped circular disc 4 is horizontally welded to the upper portion of the hatch coaming 9, and more than ten stud bolts 2a are attached to the upper surface of the circular disc 4. It was arranged appropriately. A ring-shaped packing 8 that avoids the stud bolts 2a is installed on the circular disk 4, and a steel hatch cover 7 with a hole through which the stud bolts 2a pass is closed on the periphery, and the nuts 6a are tightened evenly. I was trying to maintain oil tightness. Further, the packing 8 is made of a fluorotetrachlorofluoride resin in consideration of the corrosion resistance against the contact of the cargo.

[Problems to be solved by the device]

As described in the prior art, when considering the corrosion resistance, the packing material is generally not superior to the tetrachlorofluorocarbon resin, and the tetrachlorofluorocarbon resin-based packing is poor in elasticity, easily scratched, and If the hatch cover is repeatedly opened and closed, the reliability of oil tightness becomes thin, and if the cargo does not allow mixed water, tighten the steel hatch cover and cover the tank cleaning hatch body with the canvas cover. , It was tied with a string at the combing to prevent ingress of seawater or rainwater. The present invention has been made in view of such problems of the conventional technology, and its purpose is to perform opening and closing operations several times and to be exposed to bad weather on the sea. , The cargo is sewn in the gaps between the packings so that the cargo does not leak and seawater does not enter the cargo.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention has a dual structure of an inner structure and an outer structure, which is designed to prevent cargo from leaking and to prevent ingress of seawater etc. Is.

[Action]

The inner structure prevents cargo from leaking, and the packing made of fluorotetrafluorocarbon resin is held by a steel hatch cover coated with corrosion-resistant paint, and a material considering corrosion resistance is used, and the outer structure prevents ingress of seawater. The structure uses synthetic rubber elastic packing, the mold that covers the inner structure can be easily molded, and the rigid FRP hatch cover holds the structure in place to emphasize water tightness.

【Example】

An embodiment will be described with reference to the drawings. As shown in FIG. 1, a hole having a diameter of 300 to 400 mm is made in the upper deck 10, and a circular tubular hatch combing 9 corresponding to the diameter is erected and the hatch combing is performed. The foot of 9 is welded to the upper deck 10, the collar-shaped circular disc 4 is horizontally welded to the upper part of the hatch coaming 9, and more than a dozen stud bolts are provided on the inner edge of the upper face of the circular disc 4.
2a is properly erected, and more than ten stud bolts 2 are properly erected on the outer edge. A ring-shaped packing 8 that avoids the stud bolts 2a is installed on the inner edge of the circular disk 4, and the periphery is covered with a steel hatch cover 7 that is coated with a corrosion-resistant paint with a hole through which the stud bolt 2a passes. It is designed to be tightened evenly with the nut 6a. The packing 8 is made of fluorotetrafluorocarbon resin in consideration of the corrosion resistance against the contact of the cargo. In addition, a ring-shaped packing 5 that avoids the stud bolts 2 is installed on the outer edge of the circular disk 4, and a FRP hatch cover A having a hole through which the stud bolts 2 are formed is used to cover the periphery with a nut 6. It is designed to be evenly tightened. The packing 5 is made of elastic synthetic rubber in consideration of the watertightness against the intrusion of seawater.

[Effect of device]

Since the present invention is configured as described above, it has the following effects. This invention has a dual structure of an inner structure and an outer structure, which is designed to prevent cargo from leaking and to prevent ingress of seawater, etc. And steel hatch cover to prevent cargo leakage, the outer structure to block seawater etc. with elastic synthetic rubber packing and FRP hatch cover, and the inner structure to the outer structure FRP hatch. Since it is covered with the cover, the contact surface is not corroded, the tetrachlorofluororesin-based packing is not scratched, can be used for a long time, and is improved in oil tightness and water tightness.

[Brief description of drawings]

FIG. 1 is a side sectional view schematically showing the tank cleaning hatch of the present invention. FIG. 2 is a side sectional view schematically showing a conventional tank cleaning hatch. Main symbol A …… FRP hatch cover 2 …… Stud bolt 2a …… Stud bolt 4 …… Annular disc 5 …… Packing 6 …… Nut 6a …… Nut 7 …… Steel hatch cover 8 …… Packing 9 …… Hatch combing 10 …… Upper deck

Claims (1)

[Scope of utility model registration request] 1. A circular tubular hatch coaming 9 is erected on the upper deck 10, the feet of the hatch combing 9 are welded to the upper deck 10, and a collar-shaped circular disc 4 is provided on the upper part of the hatch combing 9. Are welded horizontally, and dozens of stud bolts 2a are appropriately erected on the inner edge of the upper surface of the circular disc 4, and tens of stud bolts 2 are appropriately erected on the outer edge. A ring-shaped packing 8 that avoids the stud bolts 2a is installed on the inner edge of the circular disk 4, and a steel hatch cover 7 with a hole through which the stud bolts 2a pass is used to cover the periphery with a nut 6a. The packing 8 is made of fluorotetrafluorocarbon resin, and the ring-shaped packing 5 is installed on the outer edge of the circular disc 4 so as to avoid the stud bolt 2, and the hole for the stud bolt 2 to pass through is provided on the periphery. Cover with the opened FRP hatch cover A and tighten with the nut 6, and the packing 5 Tank Cleaning hatch hatch cover, characterized in that to use a a force of the synthetic rubber.