JPS607341A - Water-pressure testing method for pneumatic fender - Google Patents

Abstract

PURPOSE:To prevent the deformation of a fender and to make it possible to measure accurate size, by floating the fender under test in a water tank, filling the fender with water, sinking the fender into the water to the state the fender is not deformed by the weight of the filled water. CONSTITUTION:A floating-type pneumatic fender 10 comprises a main body 11 of the fender and a mouthpiece 12. In testing, the fender is floated on a water tank 30. Water pressure devices such as water feeding and draining hose 14, to which a weight 15 is attached, and an air feeding and exhausting hose, to which a float 17 is attached, are provided in the fender. Water is injected into the inside by the hose 14. Air in the inside is exhausted through the hose 16. With the increase in weight of water, the fender skins. When the fender is fully filled with the water, the fender contacts with the bottom of the water tank. Under this state, the fender 10 is subjected to buoyancy. The weight of the water in the inside does not act on the main body 11. The circular shape is kept along the entire length. When the water pressure test is conducted under this state, the accurate sizes can be measured.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for testing the water pressure of a pneumatic fender A, and in particular, by submerging the pneumatic fender in water at a predetermined depth 1 and conducting a water pressure test. This prevents deformation of the main body of the fender due to the weight of the water filled inside the fender, thereby allowing accurate dimensional measurements.

Conventionally, containers made of rubber or other rubber-like elastic materials (
(The pneumatic fender is fully filled with compressed air and attached to the ship's hull and quay.This pneumatic fender material passes the pressure test and is shipped as a product.) However, conducting the 1111.1 pressure test at a pressure higher than the working pressure is risky of unexpected accidents, so tests are conducted using water pressure.

(2) Among pneumatic fenders, floating type fenders attached to the ship's hull have a fender body formed into an elongated cylindrical shape, so it is difficult to conduct water pressure tests on land. The fender body is deformed into a flat shape due to the weight of the water filled inside the ILC, and there is a disadvantage that it is not possible to measure the dimensions of the fender body (L). The disadvantage is that the product is easily damaged due to excessive stress, resulting in cracks or scratches due to contact with foreign objects on the floor.

This invention has been made in order to eliminate the above-mentioned drawbacks, and it is an object of the present invention to provide a method for conducting a water pressure test on a nitrogen-type fender in a state where the material is submerged in water. The purpose of this invention is to provide pneumatic fenders 1 and 4.
The object of the present invention is to provide a water pressure testing method that can accurately measure the dimensions of and does not cause damage.

-f That is, as shown in the embodiments and drawings described later, the present invention provides a water pressure test in which the pressure of yellowish water inside the pneumatic fender 10 is increased at a predetermined level to investigate the presence or absence of an abnormality. When performing
This relates to a method for hydraulic pressure testing of pneumatic fenders, which is characterized by submerging the material into water to such an extent that the material is filled with water and becomes unable to deform.

Examples of the present invention will be described below with reference to FIG. (8).

FIG. 1 is a vertical cross-sectional side view of the entire structure at the time of water injection in the water pressure test according to the method of the present invention.

In the same figure, symbols ioi and t indicate a floating pneumatic fender to be tested, and a fender body 11 formed into an elongated cylindrical shape from a rubber-like elastic body, and the fender It consists of a 1" metal part 12 attached to the end face of the material body 11.

Hydraulic pressure HJE test (l-To begin, place the water pressure test device on the cap 12 of the above fender 1).

This water pressure testing device has a supply/exhaust hose 14 with 15 weights installed at its tip, a float 17f at the end: the opening of the supply/exhaust hose 16, and a pressure gauge JVi H pipe 18 that are both new and watertight. It consists of a plate 20 attached to the plate 20' (il-not shown) and is detachably attached to the 10-metal part 12 via the plate 20' (il-not shown). When installing the plate 20, attach the end of the weight 15111II of the water supply and drainage hose 14, the side prong of the float 17 of the supply and exhaust hose 16, and the inside of the fender main body 11 (
(insert.

-1k, supply 121' water hose 14 and supply/exhaust hose 1
6 and 10 yuan county are respectively] 22.24',
! : The external hoses 26 and 25 are connected through the pressure gauge connecting pipe 18, and the pressure gauge 2 for underwater measurement is connected through the knob 26.
7 is connected to the hose 28.

The above-mentioned fender 10 is immersed in water in a water tank 6U and a water pressure test is started. The bottom of the water tank 60 is smooth, and before filling it with water, it is cleaned to remove all foreign matter such as stone blocks and glass pieces.

Connect the external hose 26 of the water supply and drainage hose 14 to the water supply/drainage hose 14.
After connecting to the knob 63 of the pedal pro 2, fully open the valve 66 and the knob 64 of the water pressure source, and then connect the hose 14 for drainage.
One of the knobs 22 is opened and water is injected into the fender body 11 through the snore drainage hose 14.

In this IHL, the nozzle 24 at the mouth of the supply/exhaust hose 16 and the nozzle 29 at the tip of the external hose 25 are left open.
7. Discharge the air inside the fender body 11 through the supply/exhaust hose 16 and the external hose 25. 7. By submerging the tip of the external hose 25 in the water of the water tank 60, the desired air υ1.
You can check the release status.

As raw water advances into the portboard body 11 and the water level rises, the tip of the supply/exhaust hose 16 becomes a float 17V.
Therefore, it floats while maintaining its protruding state above the water surface. Therefore, the air inside the fender body '1111 was almost completely exhausted and filled with water! 1'q
- Water can be injected with J.

At the point when air is no longer discharged from the tip of the external hose 25 of the supply/exhaust hose 16, the supply/exhaust B'J, ]
] = Mace's base ζ lube 24 and outside u hose 25
Close the knob 29 at the tip.

The fender 10, which had been floating in the water tank 60, sinks into the water tank 60 as the weight of the water gradually increases, but it becomes full of the injected water and becomes p++6. In point,
As shown in FIG. 2, the bottom is the bottom of the water tank 60.
The second part of the concubine is exposed above the surface of the water.

In this state, the θ three water pipes from the water supply and drainage hose 14 are gradually raised to a constant water pressure of nl'.

The pressure of the water pressure source should be 4 to 7 kg/crr, and the pressure should be adjusted as appropriate depending on the type and size of the BoM Gengetsu 1D.
Define the king.

The water pressure of regulation 5r= slows down during the time tc, i'lV shop HE
Measure 7 of the surface of the foil.

l sank into the water of tank 60! ／J肚4A10 is in a state where it is in contact with the water surface of water 4"& 30 and receives floating horns like "niheself", so the water that is injected into the inside is M(
The amount is 1 over the entire length without adding 11V to the fender 4N main body.
] The cross section of the shape is maintained by 1.

In order to maintain the fender material in such a state by 10 kfMJ, the depth of the water tank 60 must be 50 times or more the diameter of the fender main body 11. However, it is not a good idea to bury 10ffi of the fender in water because the external observation becomes an internal organ. Most preferably, it is exposed above the water surface.

The above-mentioned check of the water pressure while the water injection pressure is rising is carried out while watching the finger 11 of the pressure gauge 27, and any abnormal sounds or abnormal deformations are carefully checked.

After completing the water pressure test, turn the knob 6 of the water injection valve 62.
671・Remove the external hose 26 and remove the fender main body 1
1 Internal water supply and drainage hose 14 and external hose 2
Let it drain through 5.

At this time, a hose 'k, 1! from a compressed air source (not shown) is connected to the valve 29 at the tip of the external hose 25 of the ηS exhaust hose 16. ! Then, the valve 29 and the valve 24 at the mouth of the supply/exhaust hose 160 are fully opened, and the inside of the fender main body 11 ((correction air is fully injected. The pressure of the injected air is 0.5
~0-8 kq/crl is appropriate.

Fender: 42 υ[- inside the main body 11 - As the water level lowers due to water, the tip of the supply/exhaust hose 16 descends while keeping it protruding above the water surface due to the float 17, and the pressure of compressed air rises above the water surface. is added, so even if the water inlet 11 is lowered, the water discharge speed If is maintained high.

1, the end of the training water hose 14, 'Ij old d1 weight 15
Since it has sunk to the bottom inside the fender main body 11, what is the sound of water inside? i can be completely drained.

When water no longer comes out from the tip of the external hose 26 of the water supply and drainage hose 14, the compressed air source
9. Stop the air injection, close the mouth valves 22.24 of the underside drainage hose 14 and the supply/exhaust hose 16, and remove the external hoses 26.25 from the mouth valves 22.24.

Next, the fender 1U Kinsui@60 was pulled ashore, the water pressure was measured, Remove the valve and inject all the air at the specified pressure through the valve to make the product.

In the above embodiment, as a water pressure test device, a water supply and drainage hose with a full weight at the tip (c), a supply and exhaust hose with a float at the tip, and a pressure gauge connection pipe are attached to a plate, Although the case has been described in which the device is detachably attached to the mouthpiece, the water pressure test device used in the method of the present invention is not limited to the above embodiments.
Other hydraulic testing devices than those described above can be used.

2. As explained above, in this invention, the observation type fender is floated in water and water is poured into it, and the amount of water that fills the inside of the fender body is The structure is such that a pressure test is performed by lowering the pot to a depth where the pot itself is not used. Therefore, according to this invention, the main body of the fender will not be deformed by the force of water, and the water pressure test can be carried out while it is completely held for circular cutting. Not only is this possible, but it also prevents excessive stress from acting on the anti-abrasive body due to abnormal deformation and from coming into contact with foreign matter, making it possible to prevent damage to the product.

[Brief explanation of drawings]

FIG. 1 is a longitudinal side view showing the state of the fender during water injection in a test according to the method of the present invention, and FIG. 2 is a longitudinal front view showing the state of the fender when it is submerged in water. In the figure, 10 is a viewing type fender, and 11 is a Uj fender main body.・Patent applicant: Yokohama Rubber Co., Ltd. Representative Patent Attorney, 1!41: Tetsuya Patent Attorney Yoshiaki Haru, Patent Attorney Shimizu, Registered Patent Attorney Bei Kajiyama

Claims (1)

[Claims] Inside the pneumatic fender 1 (fill the hole and increase the pressure of water to a predetermined value 1) [7] When conducting a water pressure test to investigate the presence or absence of abnormalities, the fender under test is floated on the water surface to prevent Water is poured into the inside of the fender body, and the material body is submerged in water so that it is not deformed by the weight of the water filled inside. Test method.