JPS59144805A - Cylinder device of double acting piston type - Google Patents

Abstract

PURPOSE:To enable a device to be used in an environment, such as the underwater or the waterside, where the device is damaged by corrosive and foreign matters, by providing a bellows whose end part is fixed to the extension end of a piston rod protruding from one enclosed end of a cylinder so that the bellows is telescopically moved with the piston rod. CONSTITUTION:A pressure fluid supply controller 32 moves a piston 14 in the desired direction by supplying pressure fluid to one side or the opposite side of the piston 14 in a cylinder 12 through a flow pipe 30 or 34. While a flow pipe 36, being mounted to a bellows 22 in the location approximate to its end part 26, is connected to a tank 38 arranged in a suitable place above the surface of water and used for antirust and aticorrosion liquid, filling this liquid in the inside of the bellows 22, and as the end part 26 of the bellows 22 is extended and contracted in the longitudinal direction by operating the piston 14, the antirust and anticorrosion liquid from the tank 38 is fed to and discharged from the inside of the bellows 22. Accordingly, any place except the periphery of the cylinder and the bellows is not brought in contact with water, while any possibility of foreign matters in the water intruding into the cylinder and the bellows is not considered, causing a device to be accurately operated and also its maintenance to be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a double-acting piston-type shilling, more specifically,
This invention relates to a double-acting piston-type cylinder device suitable for use underwater.

The present invention particularly relates to a double-acting piston-type cylinder device that can be permanently installed and operated underwater or in seawater.

In order to operate submersible or submersible equipment, there is always a need in many areas for double-acting piston-cylinder systems that operate submerged. For example, the range of applications is wide-ranging, such as equipment for opening and closing the bottom of a ship, or securing the hull of a ship to a support or leg during drilling of an offshore oil well.

However, if such equipment is permanently installed underwater, especially in seawater, water and foreign matter in the water will enter the moving parts of the operating equipment, preventing corrosion of important operating parts of the equipment and causing many problems due to deposits. , there are many inconveniences regarding its maintenance and other aspects.

Therefore, the main purpose of this invention is to
The object of the present invention is to provide a double-acting piston-type cylinder device for use in an environment constantly attacked by corrosive substances and foreign substances.

An object of the present invention is to provide a double-acting piston-type cylinder device that has a simple structure, has a cylinder rod that is a moving part, is completely isolated from the outside, and is suitable for use in environments with high corrosivity and foreign matter adhesion. There is a particular thing.

Next, the double-acting piston-type cylinder device of the present invention will be explained in detail with reference to the accompanying drawings.

As shown in the drawings, the double-acting piston-type cylinder device 10 of the present invention includes a cylinder 12 made of a corrosion-resistant material, and a piston 1 that can reciprocate inside the cylinder 12.
4 and screws 1 to 16. Both ends of the cylinder 12 are closed, and an opening 20 is provided in the center of one end 18 of the cylinder. extends outward through the

One end of a bell 0-22 that can extend longitudinally coaxially with the cylinder 12 is fixed to the outer wall of the end 18 of the cylinder 12, and the end 24 of the piston rod 16 that extends outwardly has a bellow 22 It is fixed to the other end 26 of.

Attached to the other end 28 of the cylinder 12 is a conduit 30 which communicates with a pressure fluid supply control device 32 located at a suitable location above the water. On the other hand, a conduit 34 is disposed near the end 18 of the cylinder 12 on the bellows 22 side, and this conduit 34 is also connected to the pressure fluid supply control device @32.

The pressure fluid supply control device 32 is known per se.
Pressure fluid is delivered to cylinder 12 via conduit 30 or 34.
The piston 14 can be moved in the desired direction within the cylinder 12 by feeding the cavity on one side of the piston 14 or the cavity on the opposite side.

The bellows 22 includes a conduit 3 adjacent its end 26.
6 is installation. This conduit 36 is connected to a tank 38 of a rust-proofing and anti-corrosion liquid located at a suitable place on the water, and the inside of the bellows 22 is filled with this liquid. end 24 of
As the end portion 26 of the bellows 22 expands and contracts in a long direction, the anti-rust and anti-corrosion liquid is fed into the bellows 22 from the tank 38 through the conduit 36, or as the end portion 26 of the bellows 22 expands and contracts.
2 to the tank 38.

Since the double-acting piston-type cylinder device 10 of the present invention is constructed as described above, even if this device is appropriately installed and used underwater, the operation other than the outer circumference of the cylinder 12 and the hero 22 Since the parts do not come into contact with water and there is no risk of foreign objects in the water entering the cylinder 12 and bellows 22, it operates very precisely and is also easy to maintain.

Although this invention has been described above with reference to an example of its embodiment, this invention can be implemented with various modifications within the scope of the claims.

[Brief explanation of the drawing]

The accompanying drawing is a schematic cross-sectional view of an example of a double-acting screw type cylinder device of the present invention. The relationship between reference symbols and constituent elements in the drawings is as follows. 10... Double acting piston type cylinder device 12... Cylinder 14... Piston 16... Piston rod 22... Bellows 30.34... Pressure fluid conduit 32... Pressure fluid supply control Device 36... Rust-proofing and corrosion-proofing conduit 38... Rust-proofing and corrosion-proofing tank (1 other person)

Claims (1)

[Scope of Claims] 1. A cylinder with both ends sealed; a piston capable of moving within the cylinder; one end attached to the piston and the other end extending outward from one closed end of the cylinder; a bellow fixed to the outside of the one sealed end of the cylinder, the end of which is fixed to the extended end of the piston rod so that the bellow moves along with the piston rod in the longitudinal axis direction; A conduit for supplying pressure fluid to the space between the screws 1 to the cylinder and discharging the pressure fluid from the space, and a pressure fluid supply control connected to both of the pipes. A double piston type cylinder device comprising: a rust-proofing and corrosion-proofing liquid tank; and a conduit connecting the rust-proofing and corrosion-proofing liquid tank and the bellows. 2. Claim 1, wherein the cylinder and the bellows are disposed underwater, and the pressure fluid supply fli control device control device mouth rust-proofing and corrosion-proofing liquid tank is disposed above the water.
The double-acting piston-type cylinder device described in .