JPS6322250B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for testing the internal pressure of a rubber hose.

Conventionally, there have been few examples of rubber hoses being connected with the same diameter, and it is unknown what kind of tests have been conducted on the connections, but in this case, if the entire hose, including the connections, is pressurized, it is possible to check for abnormalities in the connections. can do.

However, when pressurizing the entire hose like this, if the length of each rubber hose becomes longer,
The rubber hose is manufactured and stored by winding it on a drum or the like, but at this time, the rubber hose is flat, and if internal pressure is applied as it is, there is a concern that the rubber hose will be deformed and the performance of the rubber hose will deteriorate.

Furthermore, it is difficult to inspect the connection portions wrapped inside from the outside. Furthermore, during testing, the amount of water or gas filled inside the hose is large, making it difficult to handle.

Furthermore, if there is a defect near the center of a long length with a large number of connections, it is difficult to repair it. Therefore, there has been a demand for a test method that can locally test the vicinity of the connection portion each time connection work is performed.

The present invention was made in view of the above-mentioned situation, and an object of the present invention is to provide a method for testing the internal pressure of a rubber hose by which a pressure resistance test of only the connection portion can be easily and easily performed.

The internal pressure testing method for a rubber hose of the present invention includes providing a test device main body configured such that a disc member is fixed to both ends of a disc connecting member to form a pressurized space inside a rubber hose to be connected; The test device main body is movably disposed within the rubber hose, and the test device main body is attached to a position where the disk member sandwiches the same-diameter connection portion within the rubber hose, and furthermore, a The diameter of the O-ring is enlarged to bring it close to the inner circumference of the rubber hose, and the O-ring on the outside of the rubber hose is
This is a method in which the outer circumferential positions of each ring are tied together via bands to seal the inner circumferential surface of the rubber hose and the outer circumferential surface of the disk member, fluid is sealed in the processing space and pressurized, and fluid leakage from the connection part is detected. be.

An embodiment of the method for testing the internal pressure of a rubber hose according to the present invention will be described below with reference to FIGS. 1 to 4.

Figure 1 is a cross-sectional view of the same-diameter connection before pressurization,
Figure 2 is a detailed view of the seal part in Figure 1, Figure 3 is an explanatory diagram of the setup in which the test device body is inserted into one rubber hose before connection, and the other rubber hose is connected. The figure is an explanatory diagram for carrying out a test after connection is made in FIG. 3. In Figures 1 and 2,
1, 1A is a rubber hose, 2 is a connection with the same diameter, 7, 7
A is a band, 9 is a test device main body, 10 is a connecting hose end, and 11 is a connected hose end.

The disks located on both sides of the same-diameter connecting portion 2 are disk members 3 and 16 and disk members 3A and 1, respectively.
6A, and the disk members 3 and 3A are each fixed to a hollow disk connecting member 6 arranged on the outside and connected to a pressurizing pipe 15.

Disk members 3, 3A are provided inside the disk members 3, 3A, respectively.
3A, disc members 16, 16A are arranged, and the disc members 16, 16A are sealed and slidably attached to the hollow disc connecting member 6 via an O-ring 19, respectively, so that the disc members 16, 16A are slidably attached to the hollow disc connecting member 6, respectively. They are connected by an airtight bellows 18 containing a disc connecting member 6.

Further, the hollow disc connecting member 6 is provided with a hole 17 that opens into the bellows 18. Note that the disc member 16A is also slidably attached to the pressurizing pipe 5 while being sealed.

In order to pressurize the inner periphery of the same-diameter connection part 2 with this test device main body 9, first attach the test device main body 9 to the same-diameter connection part 2, fill the bellows 18 with fluid through the pressurization pipe 15, and make a circle. Plate members 16, 16
A is pressed against the disk members 3 and 3A on both sides, respectively.
Since tapers 30, 160, 30A, 160A are formed on the outer periphery of the disc members 3, 16 and 3A, 16A, the diameter of the O-rings 4, 4A is enlarged and brought into close contact with the inner periphery of the rubber hoses 1, 1A.

After this state is reached, the outer periphery of the O-rings 4, 4A is tightened from the outside with bands 7, 7A to seal the outer peripheries of the disc members 3, 16 and 3A, 16A and the inner peripheries of the rubber hoses 1, 1A, and then the pressure This is done by pressurizing fluid into the pressurized space 8 from the pipe 5.

The order of the test is as shown in Fig. 3, where rubber hose 1 is tested with length L (manufacturing unit length of large-diameter rubber hose is 20~
When connecting rubber hoses 1A of the same diameter (limited to 30m and L is approximately 20 to 30m), (1) Insert the test device main body 9 into the rubber hose 1 in advance, and do not connect the rubber hose 1A. The rope 12 and the pressurizing pipes 5, 15 are stretched out to the outside of the connecting hose end 10 on the side.

(2) Attach the core 14 for the same diameter connection inside the rubber hoses 1 and 1A at the same diameter connection point, and bond the rubber together.
Connect with the same diameter by vulcanization, etc.

(3) The core 14 is dismantled by pulling the core rope 13 fixed in the core 14 outside the rubber hose 1A with the pressure pipes 5 and 15 stretched. Note that the core rope 13 is pulled out in advance to the outside of the connection hose end 10 on the side that is not connected.

(4) Next, pull the test device main body 9 towards the rubber hose 1A side via the rope 12 and move it to a position where the same-diameter connection part 2 is sandwiched between the disc members 3, 3A, 16, 16A, and then open the Ring 4, 4A
are brought close to the inner periphery of the rubber hoses 1, 1A, the outer peripheries of the disc members 3, 3A, 16, 16A are further tightened with bands 7, 7A, and the O-rings 4, 4A are brought into close contact with the inner peripheries of the rubber hoses 1, 1A for sealing.

(5) A pressurized fluid such as water or gas is sent from the pressurizing pipe 5 to the pressurizing space 8 and is pressurized to connect the rubber hoses 1, 1A.
Check for leaks and other abnormalities in the same-diameter connection part 2 from the outside.

As a result of the pressure test, if there is no abnormality in the same-diameter connection part 2, the next rubber hose is connected, a counter-pressure test is performed, and the above operations are repeated, thereby making it possible to lengthen the rubber hose.

In addition, if the voltage resistance test results in a failure, perform the connection work and test again.

As mentioned above, the manufacturing unit length of large-diameter rubber hoses is limited to 20 to 30 meters, and making them longer by connecting them with the same diameter at the factory makes transportation and installation easier, and also stabilizes performance. You can also do so.

In this way, the internal pressure test method for rubber hoses of this example is such that when rubber hoses each having a manufacturing unit length of 20 to 30 m are successively connected with the same diameter to obtain a long hose, immediately after connecting the joints, the internal pressure test method of the You can easily and easily perform standard pressure tests.

Therefore, a long rubber hose can be easily obtained.

As described above, according to the method for testing the internal pressure of a rubber hose of the present invention, it is possible to simply and easily perform a pressure resistance test on only the connecting portion.

In addition, according to the invention, in particular the pressurizing pipe 1
5, and a hollow disc connecting member 6 connected to the connecting member 6, and disc members 3, 3A fixed to the connecting member 6 at a predetermined interval with tapered surfaces 30, 30A formed on the outer periphery facing inward. and another disc disposed inside the disc members 3, 3A with their tapered surfaces 160, 160A facing each other, and attached to the connecting member 6 in a sealed state and slidably. members 16, 16A, an airtight bellows 18 that connects the disc members 16, 16A with the connecting member 6 built therein, and the disc members 3, 3A.
and O-rings 4, 4A built into V-shaped grooves formed by tapered surfaces 30, 30A and 160, 160A of 16, 16A. While making it possible to fill the fluid inside 18,
As a result of proceeding using the test device main body 9 configured to form a pressurized space 8 between the rubber hose to be connected, the disc members 16, 16A, and the airtight bellows 18, It is also possible to form a pressurized space that is stable and reliable at all times, and therefore, it is possible to perform pressure resistance tests stably and reliably at all times.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view of the installed state of the device for carrying out the internal pressure test method for rubber hoses of the present invention before pressurization;
The figure is a sectional view of section B of the apparatus in Figure 1 when pressurized, Figure 3 is an explanatory diagram of the setup for making connections before testing using the apparatus in Figure 1, and Figure 4 shows the connection completed from the state in Figure 3. It is an explanatory diagram at the time of a test. 1, 1A: Rubber hose, 2: Same diameter connection, 3,
3A, 16, 16A: disk member, 30, 30A,
160, 160A: Tapered surface, 4, 4A: O-ring, 5, 15: Pressurizing pipe, 6: Disk connecting member, 7, 7A: Band, 8: Pressurizing space, 9: Test device main body, 18: Airtight Bellow.

Claims (1)

[Claims] 1. A hollow disc connecting member 6 connected to the pressurizing pipe 15, and a disc fixed to the connecting member 6 at a predetermined interval with tapered surfaces 30, 30A formed on the outer periphery facing inward. members 3 and 3A, and tapered surfaces 16 on the inner sides of the disc members 3 and 3A, respectively.
Another disk member 16, 16A is arranged so that the 0,160A faces each other and is attached to the connecting member 6 in a sealed manner and slidably.
and the disc member 1 with the connecting member 6 built-in.
an airtight bellows 18 that connects 6 and 16A;
O-ring 4 incorporated in the V-shaped groove formed by the tapered surfaces 30, 30A and 160, 160A of the disc members 3, 3A and 16, 16A,
4A, which allows fluid to be filled into the airtight bellows 18 through the hole 17 provided in the connecting member 6, and also connects the rubber hose 1,
A test device main body 9 configured to form a pressurized space between the rubber hoses 1, 1A, and the airtight bellows 18 is provided, and the test device main body 9 is movably arranged inside the rubber hoses 1, 1A. At the same time, the test device main body 9 is attached to a position where the disk members 16, 16A sandwich the same-diameter connecting portion 2 in the rubber hoses 1, 1A, and the pressurizing pipe 15 is also attached.
By filling the airtight bellows 18 with fluid through the connecting member 6, the disc members 16, 16A are pressed against the disc members 3, 3A on both sides, respectively, and the above-mentioned V
The diameter of the O-rings 4, 4A incorporated in the groove is enlarged to bring the O-rings 4, 4A close to the inner periphery of the rubber hoses 1, 1A, and the O-rings 4, 4A outside the rubber hoses 1, 1A are enlarged. The inner peripheral surfaces of the rubber hoses 1, 1A and the outer peripheries of the disk members 16, 16A are sealed by binding the outer circumferential positions of the rubber hoses 1, 1A through the bands 7, 7A, respectively, and then the pressurized space is filled with fluid and pressurized. A rubber hose internal pressure testing method characterized by detecting fluid leakage at connections.