JPH08270852A - Base unit of abrasion alarming type antiabrasive hose - Google Patents

Abstract

PURPOSE: To alarm the service limit of the base of an antiabrasive hose securely and easily, by providing a groove or a hole with a specific depth to be the service limit to at least one place on the exposing part of the base unit other than a nipple part. CONSTITUTION: Since a groove or a hole 2 with a specific depth D2 to be the service limit is provided to at least one position of the exposing part of a base unit other than a nipple part 7 of the base unit 1, the inner side and the outer side of the base unit are penetrated at the groove or the hole when the part is abraded from the thickness D1 at the new condition to the thickness D2 at the service limit by transporting a fluid inside the base unit, and the service limit from leaking the transported fluid from the position is alarmed accurately without using an other measuring apparatus. And the influence to the strength of the whole body of the base unit by providing such a groove or hole, in this case, is almost negligible because the section area of the groove or the hole is very small.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mouth fitting for warning the life of the mouth fitting part of a wear resistant hose for transporting ready-mixed concrete or the like.

[0002]

2. Description of the Related Art As a wear fitting hose mouth fitting such as a joint flange or a tapered pipe is used, the inside thereof is worn away by the fluid to be transported, and finally reaches the limit of use. In this case, if it continues to be used as it is, it will lead to burst or disconnection. However, an ultrasonic thickness measuring instrument is required to measure the remaining thickness of the mouthpiece, but handling it requires specialized knowledge and is not general because it is expensive,
The accuracy was poor because the usage limit was set empirically.

[0003]

SUMMARY OF THE INVENTION The present invention has been made as a result of studying to solve the above-mentioned problems of the prior art, and certainly and easily uses wear-resistant hose mouth fittings. It is about warning the limit.

[0004]

The present invention adopts the following constitution in order to achieve the above object. That is,
In fittings attached to the end of a wear-resistant hose,
A groove or hole with a predetermined depth that is the limit of use is placed in at least one of the exposed parts of the mouth fitting excluding the nipple portion of the mouth fitting (the portion where the wear-resistant hose and the mouth fitting are fitted). When the inside of the fitting is worn out and reaches the limit of use and reaches the depth of the groove or hole, the transport fluid leaks from there to warn the limit of use. It should be noted that the predetermined depth and position of the groove or hole are determined by the shape and material of the mouth metal fitting at the time of design. Similarly, the length of the groove and the size of the hole are determined so as not to weaken the strength of the entire fitting.

[0005]

According to the present invention, since the groove or hole 2 having a predetermined depth D2 which is the limit of use is arranged in at least one of the exposed portions of the mouth metal fitting except the nipple portion 7 of the mouth metal fitting 1, the mouth metal fitting is provided. When the inside of the mouth metal wears from the new thickness D1 shown in FIG. 1 to the use limit thickness D2 shown in FIG. 2 by transporting the fluid, the groove or hole penetrates the inside and outside of the fitting. ,
It is intended to warn of the usage limit due to the leakage of the transport fluid, accurately and without using any other measuring device. Further, at this time, the influence of the arrangement of the groove or hole on the strength of the entire fitting is almost zero because the cross-sectional area of the groove or hole is small. Further, the grooves or holes can be easily arranged by milling or drilling.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway cross-sectional view showing a fitting of the present invention, in which a nipple portion 7 is fitted with a hose H having a diameter of 100 mm, and further firmly fixed by a sleeve 6. Then, a hole 2 having a diameter of 5 mm is formed in the exposed portion of the mouth fitting.
Are arranged at a depth of 8 mm. FIG. 2 shows how the mouth fitting has worn down to the depth of the hole 2 due to the passage of the transport fluid. In this state, if the high-pressure transport fluid passes through the inside of the mouth fitting, the transport fluid leaks and the usage limit of the mouth fitting is certainly warned.

In this case, only one hole is provided, but if a hole or groove is provided at another position as required, the accuracy of use can be increased and the limit of use can be warned. Further, although the present invention shows the embodiment of the flanged fitting, it can be applied to a tapered pipe in the same manner.

[0008]

As is apparent from the above description, according to the present invention, it is possible to easily and surely warn the limit of use of the mouth fitting of the wear resistant hose, so that a sudden burst or disconnection can be prevented. Became possible.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway side view showing a state in which the inner surface of the mouth metal fitting of the embodiment of the present invention has reached the limit of use.

[Explanation of symbols]

 1 Mouthpiece 2 Usage limit detection part 3 Hose reinforcement layer 4 Hose outer surface rubber 5 Hose inner surface rubber 6 Sleeve 7 Nipple part D1 New thickness D2 Usage limit thickness H Wear resistant hose

Claims (1)

[Claims] 1. A mouth fitting to be attached to an end of a wear resistant hose, wherein a groove or hole having a predetermined depth is provided in at least one exposed portion of the mouth fitting excluding a nipple portion of the mouth fitting. Abrasion warning wear resistant hose fittings featuring.