JPS6034703Y2 - Underwater disconnection device that can be manually disconnected - Google Patents

Description

[Detailed description of the invention] This invention is a remote control system using signals such as ultrasonic waves, which is currently used in cases where construction buoyancy buoys are used when laying submarine pipelines, and need to be separated after installation. This relates to a backup system (backup device) for underwater automatic disconnection devices that unlocks hooks by igniting dosing and gunpowder, and is characterized by manual unlocking by attaching simple parts to conventional disconnection devices. In particular, when disconnecting buoyant buoys or heavy objects underwater, manual disconnection is dangerous because of the load that is applied during disconnection.

The present invention is intended to avoid such dangers.

Conventionally, it is well known to use an ultrasonic signal or a wired signal to ignite a medication (gas generator), and use the ignition energy to retract a piston pin locking a hook to open the hook.

A typical device used in this method, the so-called detachment hook, is explained with reference to FIG. 1. 1 is a connector, 2
is a gas generator, 3 is a spring, and 4 is a direct-acting piston.

Thus, the current amplified by the battery due to ultrasonic, wired, etc. signals passes through the connector 1 and heats the gas generator 2.

Then, the medication (or gunpowder) stored in the gas generator in advance ignites and generates gas.

Due to this generated gas pressure, the direct-acting piston 4 resists the spring force and moves downward in the figure.

In this way, as the direct-acting piston 4 moves downward, the lateral-moving piston 5 moves to the right in the figure, and with this movement, the locking direct-acting piston 6 that locks the hook 8 moves as shown in the figure. Move upwards.

In this way, when the locking direct-acting piston 6 moves, the hook 1 locked by the piston head 7 is unlocked and rotates around the hook support shaft 9, and the hook hook portion 10
It is equipped with an automatic unlocking mechanism 11 that disconnects the wire or shackle that has been engaged with the wire or shackle.

The conventional cutting device explained above includes a machine stand 19, this machine stand 1
A hook support plate 21 hanging from 9, this hook support plate 2
The hook 1 is rotatably supported by the hook 1, and the hook 1 has a gravitational force that acts by supporting the submarine installation shown by W in the figure, and a notch provided in the head of the hook 1 or a similar effect. The direct-acting piston 6 of the above-mentioned automatic unlocking mechanism 20 engages with this member to perform locking.

However, the above-mentioned conventional underwater automatic cutting device has the following problems.

(i) In addition to ultrasonic and wired signal transmission methods, timed methods are available, and many of the detachable hooks are used in marine surveys and construction work, so the environment is poor and signal transmission may not work for some reason. be.

(ii) Even if a signal is received, it must pass through a part of the electronic circuit and battery built into the disconnection hook until it ignites, and disconnection may fail due to defects in these parts or trouble. .

(iii) Gas generator detonators and gunpowder are normally manufactured to improve manufacturing accuracy through sampling inspection, but the possibility of a misfire is not zero.

(iv) Unless the gas generator ignites for some reason, it will not only be impossible to disconnect, but also the expensive disconnection hook will be impossible to recover.

(V) When cutting underwater, a load is often applied, and it is often dangerous to perform mechanical separation such as cutting using a careless person (diaper).

In view of the above-mentioned problems with conventional underwater automatic disconnection devices, the present invention relates to a manual disconnection device that is installed as a backup system (backup device) for the conventional underwater automatic disconnection devices.
Of course, a separation hook in which the automatic unlocking mechanism is omitted and only the manual separation device of the invention is installed is included in the gist of the invention.

Next, the underwater disconnection device capable of manual disconnection of the present invention is installed in the first to
The explanation will be based on the embodiment shown in FIG.

The reference numerals and members used in the explanation of the conventional apparatus in FIG. 1 are used as they are in the present invention, and therefore will not be repeated here to avoid duplication of explanation.

That is, the present invention comprises a machine base 19, a hook support plate 21 hanging from the machine base 1, a hook 8 rotatably supported on the hook support plate 21 by a hook support shaft 9, and the hook 8. The automatic unlocking mechanism 20 is the same as the conventional one, but the piston head 7 of the locking direct-acting piston 6 of the automatic unlocking mechanism 2 is used as a member for locking the hook 8. A release lever 15 rotatably supported by a support shaft 16 is provided at the head of the hook stand.

The release lever 15 is stopped from rotating clockwise in the figure by a stopper pin 17 provided at the head of the L near release 8.

Furthermore, when the locking direct-acting piston 6 protrudes for locking, the base of the release lever 15 is designed to fit and be locked in shape with the piston head 7 of the locking direct-acting piston 6.

Further, the hook support plate 21 is provided with a manual release lever 13 rotatably supported by a support shaft 14 having a notch 14' in the shaft for unlocking the release lever.

When locked, the end portion of the release lever 15 is locked by the shaft portion 14'' left from the notch 14' of the support shaft 14, and when manually released, the manual release lever 1
Operate 3 counterclockwise.

As shown in FIG. 1, this manual release lever 13 has
A long drawstring 11 with one end fixed is attached to the manual release lever 13, and the drawstring 11 is fixed to the outside of the hook support plate 21 in a wound state.

12.12 is a safety pin for permanently fixing the manual release lever 13 to the hook support plate 21, and the operation of pulling out this safety pin 12.12 is performed by a person (diaper) only when manual release is performed. shall be taken as a thing.

Reference numeral 18 denotes a weak leaf spring provided to bias the release lever 15 so as not to rotate in the clockwise direction in the figure and to stabilize the locking of the piston head 7 to the notch in the head of the release lever 15. be.

Next, a procedure for underwater disconnection of the hook 1 using the manual disconnection device of the present invention will be described.

For some reason, the gas generator 2 of the automatic unlocking mechanism 20 of the above structure provided on the hook 8 does not operate, and the locking direct-acting piston 6 cannot be moved upward in FIG. The manual disconnection device of the present invention is used when automatic unlocking is not possible.

To do this, the first person (diaper) pulls out the safety pins 12 and 12 shown in FIG. Move to a more secure location.

By pulling the drawstring 11, the manual release lever 13 is rotated about the support shaft 14 in the counterclockwise direction in the figure.

Along with this, as shown in FIG. 2b → FIG. 3 → FIG. The combination is solved,
The release lever 15 rotates counterclockwise in the figure around the support shaft 16.

Note that the leaf spring 18 is for ease of setting.
Since a material with a weak spring force is used, the downward force of the release lever 15 at the time of separation is generated by the downward force caused by W and the inclination of the contact point between the piston head 7 and the release lever 15 about the hook support shaft 9.

As a result, the locking direct-acting piston 6 is released from being restrained by the piston head 7, and the hook 8 rotates clockwise around the hook support shaft 9, and the wire and shackle that were engaged with the hook hook portion 17 are released. etc. are separated.

In addition, we tried a practical test of this invention for a 2-ton load (breaking load was 10 tons), but the load (pulling force of the drawstring) when operated manually in the disconnection test with a load of 2 tons was at most. It was 5-7 kg.

According to the present invention, when disconnecting a buoyant buoy or heavy object underwater, even if the automatic disconnection device does not operate, a person (diaper) can manually disconnect it at a position where the danger of the load can be avoided. It is possible.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a partially cutaway front view, Fig. 2a is a plan view, the same is a front view with main parts cut away, and Figs. 3 to 5. 2A and 2B are front views illustrating the operating states of the main parts during manual separation, respectively. 1...Connector, 2...Gas generator, 3...Spring, 4...Direct-acting piston, 5...Transverse-acting piston , 6... Direct-acting piston for mountain piston, 7... Piston head, 1...
...Hook, 9...Hook support shaft, 10.
...Hook hook part, 11...Drawstring, 12.
... Safety pin, 13 ... Manual release lever, 14 ... Support shaft, 14' ... Notch, 14" ... Shaft part , 15...Release lever 16...Support shaft, 17...
・Stopper pin, 18...Plate spring, 19...
... Machine base, presentation 1 ... Automatic unlocking mechanism, 21.
...Hook support plate.

Claims (1)

[Scope of utility model registration request] A hook rotatably supported by a hook support plate hanging from the machine base, a release bar rotatably supported in only one direction by a stopper on the head of the hook for locking the hook, and a release bar for unlocking the hook. In the detachment device equipped with an automatic unlocking mechanism for the purpose of the present invention, the hook support plate is provided with a rotatable manual release bar integrally with a support shaft having a notch for unlocking the release bar in the shaft, and the manual release bar is rotatable integrally with the support shaft. An underwater disconnection device capable of being manually disconnected, which has a built-in long drawstring with one end fixed to the support shaft, and locks the release bar with the shaft portion left from the notch of the support shaft when locked.