JPS599396B2 - Timed simple release device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that connects two objects and separates them after a predetermined period of time has elapsed, and in particular, a device that can automatically connect two objects after a predetermined period of time has elapsed without relying on external transmission or mechanical force. This invention relates to a time-limited simple detachment device that allows for automatic detachment.

Conventionally, two objects are temporarily connected by a connecting device, and in order to break the connection, the connecting device is mechanically maintained in a connected state by an appropriate locking means, and this locking is broken by an external force. It has been proposed to release the bond by releasing it, or to disconnect the bond remotely using a signal such as an ultrasonic wave.
However, in either case, the structure of the detachment device becomes complex, especially when the detachment involves danger, or when the detachment device is used at sea, etc., and it is difficult to mechanically transmit external force to the detachment device. In some cases, remote control using ultrasonic waves or the like must be used, which has the drawbacks of making the structure more complex, resulting in unstable performance and higher prices. . It is an object of the present invention to eliminate such drawbacks and to provide a timed simple detachment device that is inexpensive and allows two objects to be automatically detached after a predetermined period of time without relying on external signals or mechanical force. .

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view showing a first embodiment of the present invention.
The container is composed of a cylindrical main body 2 with a bottom, and a lid 3 that is removable from the main body 2.

Holes 4 and 5 are bored in the bottom of the main body 2 and in the center of the lid 3, and a connector 6 passes through the inside of the container 1 described above. Threads 7 are formed at both ends of the connector 6, and locking devices 8 such as eye nuts are screwed into the screws 7.
A notch 9 is formed in the center of the connector 6 and has enough extra thickness to break under a predetermined tensile load. Note that the reference numeral 10 is a washer interposed between the container 1 and the locking tool 8. On the other hand, a compound 11 is sealed in the container 1.

This compound 11 reaches an expansion pressure that exceeds the breaking load of the connector 6 after a predetermined period of time has elapsed, and an auxiliary agent is added to suppress the breaking time. Further, if the expansion reaction of the compound 11 is not initiated due to ambient temperature or the like, an induction accelerator is added. Although FIG. 1 shows the connector 6 provided with a notch 9, there is a difference between the increase in tensile stress on the connector 6 due to expansion of the compound 11 and the allowable tensile stress of the connector 6. Depending on the fit, the notch 9 may not necessarily be provided.

Furthermore, the fracture site is not limited to the general cross section of the connector 6, but can be determined by appropriately selecting the screw T at the end of the connector 6 and the thread shape of the locking tool 8, or the engagement size of the connector 6. Stop 8
It is also possible to set it at the screwing part of the. in this case,
This will result in shear failure of the threaded part. FIG. 2 is a sectional view showing a second embodiment of the invention.

In this embodiment, the main body 2 of the first embodiment can be separated in the axial direction from approximately the center. In this case, even if the compound 11 expands and clings to the connector 6, the main body 2 can be reliably separated.
FIG. 3 is a sectional view showing a third embodiment of the present invention.

In this embodiment, the function of the connector 6 in the first and second embodiments is provided in the container 1 itself, and includes a main body 2 having a locking device 8 on the bottom surface and a lid 3 having a locking device 8 on the outer surface. Main body 2
The container 1 is formed by screwing together the opening ends of the two. A notch 9 is formed on the outer circumferential surface of the main body 2, and the fracture portion is set in the cylindrical portion of the main body 2. Note that, as in the first embodiment, it is not necessarily necessary to provide the notch 9 in the main body 2 due to the relationship between the expansion pressure and the allowable tensile stress. It's okay. FIG. 4 is a sectional view showing a fourth embodiment of the present invention.

In this embodiment, pores 12 are provided at appropriate positions in the container 1. In the first to third embodiments, when using the bonding device of the present invention, the compound 11 is assembled and used after adding an inducing agent to initiate the swelling reaction. Therefore, when transporting to a long distance, it is necessary to finally assemble the coupling device of the present invention at the installation site. However, according to this embodiment, after the pre-assembled coupling device is transported to the installation site, appropriate holes 12 are inserted into the coupling device. The swelling reaction can be started by injecting and permeating an inducing agent. In addition, coupling devices are used under the sea, etc. to induce In the case of agent or water, simply by dropping the coupling device according to this embodiment into the sea, the seawater will enter through the pores 12 and the expansion reaction can be automatically started. The timed simple disengagement device according to the present invention can be used, for example, at sea. -When connecting ocean observation equipment with buoyancy at the bottom using a pressure-resistant pipe and detaching it after a predetermined period of time to recover the ocean observation equipment, or when laying a pipeline to the seabed, the pipe body that constitutes the pipeline When towing with buoyancy applied to the pipe, a pressure-resistant pipe is connected to the pipe body to facilitate towing, and when the pressure-resistant pipe is disconnected after towing and a pipeline is laid, there is a risk of danger on the ground. Used for detaching work parts, etc.

Since the present invention is configured in this way, compound 11
A tensile or shearing load is applied to the connector 6 due to the expansion of the
In order to break the connector 6, the two connected objects can be automatically separated via the separation device after a predetermined period of time has elapsed.

Therefore, since no transmitting/receiving device is required as in the prior art, the structure is simple, and troubles and adjustments associated with transmitting and receiving are unnecessary, so that an inexpensive and reliable detachment device can be obtained. Next, the present invention will be explained in more detail with reference to specific examples.

Experimental example 1 Outer diameter φ60.5mm1 Inner diameter φ50.51L7! A steel container 1 with a height of L1 of 150 mm is used as a connector (see Figure 3).The extra wall thickness of this container 1 is 0.5 m7! The notch that becomes L is 3
Table 1 shows the time required for fracture due to changes in the blending ratio when water is used as an induction accelerator and an auxiliary agent is added to a compound mainly composed of calcium silicate.
It became like that.

Experimental example 2 Outer diameter φ60.5m77! , inner diameter φ50.51t71t1
A notch (φ6~
Table 2 shows the time required to break due to changes in the blending ratio when using a coupling tool (φ1671tm) with a diameter of φ77Nm), using the same compound and auxiliary agent as in Experimental Example 1, and using water as the inducer. Ta.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention, FIG. 2 is a sectional view showing a second embodiment of the invention, FIG. 3 is a sectional view showing a third embodiment, and FIG. The figure is a sectional view showing the fourth embodiment. 1...Container, 2...Body, 3...
・・・Lid, 4, 5...hole, 6...connecting tool, 7...screw, 8...locking tool, 9
・・・・・・Notch part, 10...Washer, 11
...Compound, 12...Through hole.

Claims (1)

[Claims] 1. A container equipped with locking devices at both ends that are connected by a connecting device, and a compound that is sealed inside the container and reaches a predetermined inflation pressure after a predetermined period of time. A simple timed release device characterized by rupture.