JPS6029055B2 - Pressure test equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pressure test device for a brake hose having joint-type metal fittings at both ends.

[Prior Art] High-pressure hoses used in hydraulic circuits, such as brake hoses, are used with terminal fittings attached to both ends of the hose in order to fully demonstrate its performance.

Brake hose terminal fittings include straight joint type fittings and joint type fittings.

Straight joint type fittings are called female type fittings or male type fittings, and are used to connect brake hoses in a straight line. On the other hand, the eye joint type fitting is a terminal fitting that has recently been put into practical use for brake hoses.
The brake hose can be connected in a direction perpendicular to the length of the hose. For this reason, the joint type fitting is useful for piping in narrow spaces such as the engine room of a front-engine, front-drive vehicle. Now, brake hose manufacturers rarely sell hoses alone, and usually deliver them to customers as brake hoses with terminal fittings.

Therefore, brake hoses with terminal fittings are mass-produced in quantities greater than the number of automobiles produced. For this reason, brake hose manufacturers need to quickly conduct pressure tests on brake hoses with terminal fittings. On the other hand, in a conventional pressure tester for brake hoses with terminal fittings, a plurality of fluid supply side clamp cylinders are installed on one side of the machine frame, and the same number of fluid discharge cylinders are installed on the other side as on one side. A type of clamp cylinder in which a high-pressure hose with a cap at both ends is tightly connected between each opposing clamp cylinder, and fluid is sealed in each high-pressure hose to test the pressure resistance of the high-pressure hose. However, with this testing machine, the hoses must be connected and disconnected one by one each time a test is performed.
There is a drawback that setup time in addition to the test time is required.

In addition, a pressure tester for brake hoses with multiple terminal fittings has been developed, as in Mochikai No. 51-41582. The disadvantages are that a mounting section is required, and the test equipment is large because it operates using high-pressure air. Moreover, these conventional testing machines are all for pressure testing of brake hoses with straight joint type fittings, such as female fittings or male fittings, so they are not suitable for pressure testing of brake hoses with eye joint type fittings, which are structurally different. It cannot be used for other purposes. That is, in the conventional pressure test of a brake hose with a straight joint type fitting, the end of the straight joint type fitting is hollow, and a cylindrical valve with a packing can be easily inserted into this hollow part and sealed for testing. However, in pressure tests of brake hoses with joint-type fittings, the entrances are located at the top and bottom, making it extremely difficult to seal the high pressure quickly.

FIG. 1 is an explanatory diagram of a brake hose with joint type fittings attached to both ends thereof.

In Fig. 1, 10' is the brake hose body, 11'
is the eye joint fitting, 12' is the eye joint fitting 1
1' is the closed part. Conventionally, pressure tests of this type of brake hoses with joint-type fittings have been carried out using an apparatus shown in FIG. In Fig. 2, 10' is the brake hose body, 11' is an eye joint type fitting, 13', 1
5' is a copper packing, 14' is a cap nut, and 16' is a fluid passage hole 17' is a special nut 17 having a fluid passage hole 16'.
', 18' are bolts, and 19' is a high-pressure water supply pump. That is, one end of the spray hose with joint type fittings has a copper packing 13' and a cap nut 14', and the other end has a steel packing 15', a special nut 17', and a perforated bolt 1.
It was tightened by 8'.

Therefore, in this method, bolts, nuts, etc. are vertically attached and loosened for each test hose, and the test efficiency is extremely low. [Problems to be Solved by the Invention] The present invention has been made from this perspective, and its purpose is to provide a pressure resistance test device that can perform pressure resistance tests on brake hoses with joint-type fittings with a simple one-touch operation. Our goal is to provide the following.

[Means for solving problems]

The gist of the present invention is to provide a pressure test device for a brake hose with eye-joint type fittings at both ends, in which a fluid hole is located approximately at the center above and below the entrance portion of the eye-joint type fitting of the brake hose with eye-joint type fittings. A piston with a fluid passage hole is placed in the upper part of the upper packing, and the piston can move up and down by operating a handle to perform initial sealing and vertical sealing. A pressure test device is characterized in that it is provided with a toggle mechanism that can be turned on and off.

[Effect]

The functions of the present invention include upper and lower packings provided with fluid holes through which pressure fluid can pass, a piston also provided with fluid holes through which pressure fluid can pass, and a toggle that allows the piston to be moved upward or downward with a single touch. By effectively combining the mechanisms, the end seal of the brake hose with the joint type fitting can be quickly initialized, tightened, and released, and the pressure resistance test of the brake hose with the joint type fitting has been significantly improved. be.

[Example] Next, a third example of the pressure test device of the present invention will be described.
This will be explained using figures.

In Fig. 3, 10 is the brake hose body subjected to the pressure test, 11 is a joint type fitting, 12 is a clamp device, 13 is an upper packing, 14 is a lower packing, and 15 is provided on the upper packing 13 and the lower packing. fluid hole,
16 is a piston, 17 is a handle, 18 is a fluid passage hole provided approximately along the central axis of the piston, 19 is a cylinder, 20G fluid pressure chamber, 21 is a high pressure water chamber, 22 is a compression coil spring, and 23 is high pressure water Generation pump, 24, 25
is a stop valve, 26 is a water discharge groove, 27 is a high pressure introduction hole, 2
It is 81 consecutive boards.

In FIG. 3, the cross-sectional area of the piston 16 is D. The ratio of the cross-sectional area D2 of the opening 12' of the joint fitting 11 is D
, >D2.

This was done by using fluid pressure to connect the eye joint fitting 1.
This is to self-seal 1. That is, D,>D2
This is because the minimum pressure necessary for self-sealing is reliably generated by establishing the relationship. Next, the operation of the pressure test apparatus shown in FIG. 3 will be described. First, the piston 16 is pushed down by the handle 17 of the toggle mechanism, and the eye joint type fitting 11 is attached to perform an initial seal.

Next, the stop valves 24 and 25 are raised, water is passed through, and the air inside the brake hose 10 is removed.

After that, when the stop valve 25 on the outlet side is closed, the brake hose 1 is
The river will be under high pressure and a pressure test will be conducted. At this time, the clamping device 12 is moved into the pressure chamber 2 by the water pressure.
Since the pressure inside 0 is increased, the piston 16 is further pushed down and the joint fitting 11 is completely tightened.

After conducting the test for a certain period of time, the outlet side stop valve 25 is raised and the inlet side stop valve 24 is closed to discharge water.

Next, when the handle 17 is raised, the piston 16 is lifted by the action of the compression coil spring 22, and the eye joint fitting 11 is untightened. According to the pressure test device of this embodiment configured as described above, in the clamp device 12, the piston 16 and the cylinder 19, which are configured with a toggle mechanism and a self-sealing mechanism, perform initial sealing of the eye joint fittings 11 at both ends of the hose and Because it performs increasing compression, testing can be carried out very efficiently without the need for any tools such as spanners, and it also eliminates the need for tightening bolts and nuts. This has the effect of solving the problem of lifespan all at once.

〔Effect of the invention〕

The pressure tester of the present invention can quickly perform a pressure test of a brake hose with eye joint fittings at both ends, and is industrially useful.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram of a brake hose with joint fittings on both ends, Figure 2 is an explanatory diagram of a conventional pressure test device, and Figure 3 is an explanatory diagram of a brake hose with joint fittings on both ends.
The figure is an explanatory view showing one embodiment of the pressure resistance test device of the present invention. 10', 10...Brake hose body, 11', 11・
...Eye joint type fitting, 12'...
Opening of eye joint type fitting, 13', 15'...
...Copper packing, 14'...Cap nut, 16
'...Fluid passage hole, 17'...Special nut, 18'...Bolt, 19'...High pressure water supply pump, 12... Clamp device, 13...
...Top packing, 14...Bottom packing, 15...
Packing fluid hole, 16. ．．・・・． Piston, 17.
... Handle, 18 ... Fluid passage hole of piston, 19 ... Cylinder, 20 ... Fluid pressure chamber, 21 ... High pressure water distribution chamber, 22...
... Compression coil spring, 23 ... High pressure water generation pump, 24, 25 ... Stop valve, 26 ...
...Water drain groove, 27...High pressure introduction hole, 28.
...Connection plate. ★14-na Z diagram 3 diagram

Claims (1)

[Claims] 1. In a pressure test device for a brake hose with eye joint type fittings on both ends, above the opening of the eye joint type fitting of the brake hose with eye joint type fittings on both ends,
A gasket with a fluid hole provided approximately in the center is disposed at the bottom, and a piston having a fluid passage hole approximately in the center is placed on the upper portion of the upper gasket. A pressure test device characterized in that it is provided with a toggle mechanism that operates downward to perform initial sealing, tightening, and tightening release.