JP2017026333A - Metal fitting for use at hose end in hydraulic pressure testing of hoses - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal fitting for use at a hose end in hydraulic pressure testing of hoses that permits easy engagement and disengagement of hoses and facilitates measuring of the twist angle of the hose at only one end thereof.SOLUTION: A bearing 6 is disposed over a base 3, a rotating body 7 is rotatably fitted to the bearing 6, a sliding body 15 is fitted to the rotating body 7 to be slidable back and forth, and a terminal part of the hose 2 is disposed to be held between the tips of the rotating body 7 and of the sliding body 15.EFFECT: The sliding body is caused to slide back and forth relative to the rotating body to permit easy engagement and disengagement of the hose, and the rotational angle of the rotating body relative to the bearing enables any twist of the hose to be easily measured.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hose end fitting in a water pressure test of a hose, and particularly to a fitting for measuring a hose twist angle generated when water pressure is applied to a hose.

  In a water pressure test of a hose such as a fire hose, as described in Japanese Utility Model Publication No. 52-4068, a metal fitting that can be easily attached and detached by air pressure is known.

  The cylinder shaft is slidably inserted back and forth in the assembled outer cylinder, a tapered tapered surface is formed at the front end of the assembled outer cylinder and the cylinder shaft, and the cylinder shaft is slid back and forth by air pressure. By crimping, the end portion of the hose is clamped and fixed between the tapered surfaces.

  However, it is inevitable that torsion is caused by pressurization in a hose mainly composed of a tubular woven fabric such as a fire hose, and in the water pressure test of this type of hose, measure the degree of torsion. However, in the metal fitting described in the above publication, the twist angle cannot be measured.

  Usually, in the case of a fire hose, the maximum inner diameter is 65 mm, and the twist angle is about 1 to 2 rotations per 20 m. If the front end of the hose is fixed, the rotation angle of the far end can be adjusted from the front end. Since it can be measured sufficiently visually, there is no practical problem even with the metal fittings described in the above publication.

  However, in recent years, a long hose with a larger diameter has been demanded in various applications, and a test is performed at a higher water pressure, making it difficult to measure the twist angle of such a hose. ing.

  In other words, when the hose has a large diameter, the hose twist angle decreases accordingly, but when the hose is several hundred meters long, the overall twist angle increases accordingly, and it is difficult to measure the whole visually. Become.

Japanese Utility Model Publication No. 52-4068

  The present invention has been made in view of such circumstances, and in the hose end fitting in the hydraulic test of the hose, the hose can be easily attached and detached, and the torsion angle of the hose can be easily measured with only one fitting. An object of the present invention is to provide a metal fitting that can be used.

  Thus, the present invention provides a bearing on the base, rotatably attaches the rotating body to the bearing, and attaches the sliding body to the rotating body so as to be slidable back and forth. The terminal portion of the hose is clamped to the tip of the moving body.

  In the present invention, a holding member is detachably attached to the tip of the rotating body, a tapered surface is formed on the inner surface of the holding member and the outer surface of the sliding body, and the sliding body is formed inside the holding member. It is preferable that the end portion of the hose is clamped between the tapered surfaces by fitting the end portion of the hose to the outside and sliding the sliding body forward with respect to the rotating body.

  Moreover, in the said structure, the said rotary body has a pair of opposing board which opposes back and forth, and the cylinder which connects the outer peripheral part of the said opposing board, The attachment which protruded to the front part of the said front opposing board The clamping member is attached to a cylinder, and the sliding body includes a flange that opposes the front and rear and a pipe body that connects the flange, the rear flange is fitted to the inner surface of the cylinder, A flange is fitted to the inner surface of the mounting cylinder, and the sliding body is moved back and forth with respect to the rotating body by press-fitting compressed air between the front facing plate and the front or rear flange. It is preferable to slide the hose between the tapered surfaces. In the metal fitting of the structure, it is preferable that the rear flange has a larger diameter than the front flange.

  In the present invention, it is preferable that a pointer and a scale for displaying a rotation angle of the rotating body with respect to the bearing are provided on the bearing and the rotating body. Moreover, it is preferable to provide an exhaust pipe that communicates from the upper part in the end part of the hose to the outside of the wall surface of the rear part of the bearing.

  According to the present invention, the sliding body is slid back and forth with respect to the rotating body by press-fitting compressed air as a pressure fluid between the front facing plate and the front or rear flange. The hose can be easily attached and detached, and the torsion of the hose can be easily measured with only one metal fitting by the rotation angle of the rotating body with respect to the bearing.

Central longitudinal sectional view showing a state in which the sliding body in the present invention is slid rearward The center longitudinal cross-sectional view which shows the state which slid the sliding body in this invention forward, and clamped the hose III-III sectional view in FIG.

  The present invention will be described below with reference to the drawings. Reference numeral 1 denotes a mounting bracket for attaching the end of the hose 2 of the present invention. The base 3 is placed on the floor 4 so as to be movable back and forth by wheels 5. The bearing 6 is fastened and fixed by a fastening bolt 38. The hose 2 is mounted linearly on the floor surface 4, and the other end is fixedly attached at a predetermined position.

  A rotating body 7 is rotatably attached to the bearing 6 by bearings 8 and 8. The rotating body 7 includes a pair of opposing plates 9 and 10 that are opposed to each other in the front-rear direction, and a cylindrical body 11 that connects the outer peripheral portions of the opposing plates 9 and 10. It is assembled by tightening in an annular shape.

  A mounting cylinder 13 is provided on the front part of the front counter plate 9 in the rotating body 7 so as to project forward. A clamping member 14 is detachably attached to the tip of the mounting cylinder 13. ing.

  Next, reference numeral 15 denotes a sliding body. The sliding body 15 has flanges 16 and 17 opposed to each other in the front-rear direction, and the flanges 16 and 17 are tube bodies 18 that penetrate the inside of the front facing plate 9 in an airtight manner. It is connected. The rear flange 17 is airtightly fitted to the inner surface of the cylinder 11, and the front flange 16 is airtightly fitted to the inner surface of the mounting cylinder 13.

  A projecting cylinder 19 is formed on the outer peripheral front portion of the front flange 16 of the sliding body 15, and tapered taper surfaces 20 and 21 are formed on the outer surface of the projecting cylinder 19 and the inner surface of the holding member 14. ing.

  By fitting the hose 2 to the outer periphery of the overhanging cylinder 19, coupling the clamping member 14 to the tip of the mounting cylinder 13, and sliding the sliding body 15 forward relative to the rotating body 7 in this state, The end portion of the hose 2 can be clamped between the tapered surfaces 20 and 21 to fix the hose 2 in an airtight and firm manner.

  The bearing 6 is provided with air inlets 22, 23, and the air inlets 25, 26 in the thickness of the tubular portion 24 of the rotating body 7 and the rear opposing plate 10 from the air inlets 22, 23. Through the air supply pipes 27 and 28 connected between the front and rear opposing plates 9 and 10, and further through the air supply paths 29 and 30 formed in the front opposing plate 9 and the front opposing plate 9 and the front part Compressed air is fed into the spaces 31 and 32 between the front flange 16 and between the front facing plate 9 and the rear flange 17.

  By feeding compressed air from the air inlet 22 into the space 31 between the front facing plate 9 and the front flange 16 via the air supply path 25, the air supply pipe 27 and the air supply path 29, The moving body 15 is slid forward, and compressed air is supplied from the air inlet 23 to the space 32 between the front facing plate 9 and the rear flange 17 through the air supply path 26, the air supply pipe 28 and the air supply path 30. By feeding in, the sliding body 15 can be slid back.

  Reference numeral 33 denotes a pointer attached to the bearing 6, which indicates a scale formed on the back surface of the counter plate 10 behind the rotating body 7. In FIG. 3, the end of the bolt 12 is used as a scale. However, when it is necessary to measure a finer angle, a scale can be separately provided.

  Reference numeral 34 denotes an exhaust pipe 34 for discharging the air in the hose 2, and discharges from the upper part of the hose 2 through the pipe body 18 and the tubular portion 24 to the outside from the wall surface of the water supply pipe 36 at the rear of the bearing 6. It is supposed to be. When the air in the hose 2 is exhausted, the valve 35 is closed and the exhaust pipe 34 is closed.

  Thus, in order to use the mounting bracket 1 of the present invention, as shown in FIG. 1, the holding member 14 is fitted to the end of the hose 2, and the end of the hose 2 is projected from the sliding body 15. The clamp member 14 is fitted to the outer periphery of the cylinder 19 and the clamping member 14 is coupled to the mounting cylinder 13 of the rotating body 7. The tip of the hose 2 is fixed by an appropriate means.

  At this time, by forming a window 37 in the holding member 14, the end of the internal hose 2 can be seen from the window 37, and it is visually confirmed that the hose 2 is properly fitted. Can do.

  By sending compressed air from the air inlet 22 in this state, the compressed air passes through the air supply path 25, the air supply pipe 27, and the air supply path 29, and the opposing plate 9 and the sliding body 15 in front of the rotating body 7. 2, the sliding body 15 slides forward as shown in FIG. 2, and the tapered surface 21 of the clamping member 14 and the tapered surface 20 of the overhanging cylinder 19 are brought into contact with each other. The end of the hose 2 is sandwiched between them, and the hose 2 is securely and firmly fixed.

  Next, when water is fed from a water pipe 36 coupled to the rear part of the bearing 6, the water enters the rotary body 7 through the tubular portion 24 of the rotary body 7 and further passes through the pipe body 18 of the sliding body 15. It is press-fitted into the hose 2 and a water pressure test can be performed on the hose 2.

  At this time, air is contained in the hose 2 before water is fed in. When high-pressure water is fed into the hose 2, the air is compressed and the hose 2 may burst. Sometimes it can be explosive and can be extremely dangerous. Therefore, the upper air in the hose 2 is exhausted by the exhaust pipe 34. When the air in the hose 2 is discharged and the exhaust pipe 34 is filled with water, the valve 35 is closed and the exhaust pipe 34 is closed.

  Further, at this time, by making the rear flange 17 of the sliding body 15 larger in diameter than the front flange 16, the force of pushing the rear flange 17 forward by the water pressure in the water pressure test causes the front flange 16 to move forward. Therefore, the sliding body 15 is pushed forward, the hose 2 is firmly clamped between the tapered surfaces 20 and 21, and the hose 2 is not inadvertently dropped.

  When the hose 2 is twisted in the water pressure test, the rotating body 7 is rotatable with respect to the bearing 6, and the sliding body 15 is fixed inside the rotating body 7 via the hose 2. As the hose 2 is twisted, the rotating body 7 and the sliding body 15 can rotate together, and the rotation angle can be measured.

  At this time, according to the example of the drawing, the end of the bolt 12 can be measured with the pointer 33 attached to the bearing 6 as a scale. In the example of the drawing, 16 bolts 12 are provided on the outer periphery of the rotating body 7 at equal intervals, so that the measurement can be performed in units of 22.5 degrees, which is sufficient in a normal water pressure test. When it is necessary to measure a finer angle, it is possible to add a scale separately.

  In addition, the hose 2 may expand and contract due to the water pressure acting on the hose 2, but in this case, the wheels 5 roll to cause the base 3 and the entire mounting bracket 1 mounted on the base 3 to move. It can move back and forth to absorb the expansion and contraction of the hose 2. It is also possible to measure the degree of expansion and contraction of the hose 2 by attaching a scale at the position of the base 3 to the floor surface 4.

  After a predetermined water pressure is applied to the hose 2 for a predetermined time and a predetermined water pressure test is performed, the water supply from the water supply pipe 36 is stopped, the water pressure in the hose 2 is reduced, and the water in the hose 2 is supplied to the water supply pipe. 36 is discharged.

  After the pressure in the hose 2 is lowered, when compressed air is fed from the air inlet 23, the compressed air passes through the air feeding path 26, the air feeding pipe 28 and the air feeding path 30 and the front opposing plate 9 and the rear part. Is pressed into a space 32 between the flange 17 and the sliding body 15 is slid rearward with respect to the rotating body 7 to release the pinching pressure of the hose 2 between the tapered surfaces 20 and 21 and remove the hose 2. be able to.

  At this time, the compressed air that has been press-fitted into the space 31 between the front facing plate 9 and the front flange 16 passes through the air supply path 29, the air supply pipe 27, and the air supply path 25, and then the air inlet 22. Discharged from.

  Therefore, according to the present invention, the hose 2 can be easily attached and detached by press-fitting air from the air inlets 22 and 23, and when the hose 2 is twisted in the water pressure test, the hose 2 is twisted. Since the rotating body 7 rotates with respect to the bearing 6 due to the force, the degree of twisting of the hose 2 as a whole can be known with only one fitting by measuring the number of rotations and the rotation angle.

  In the above description, compressed air is used as the pressure fluid for attaching and detaching the hose 2, but in the present invention, not only the compressed air but also a pressure fluid such as water pressure or hydraulic pressure can be used.

DESCRIPTION OF SYMBOLS 1 Mounting bracket 2 Hose 3 Base 6 Bearing 7 Rotating body 9,10 Opposing plate 11 Cylindrical body 13 Mounting cylinder 14 Holding member 15 Sliding body 16, 17 Flange 18 Tubular body 20, 21 Taper surface 31, 32 Space 33 Pointer 34 Exhaust pipe

Claims (6)

A bearing (6) is provided on the base (3), a rotating body (7) is rotatably attached to the bearing (6), and a sliding body (15) is moved back and forth with respect to the rotating body (7). Attaching the hose end in a water pressure test of the hose characterized in that the end of the hose (2) is clamped to the tip of the rotating body (7) and the sliding body (15). Metal fittings A clamping member (14) is detachably attached to the tip of the rotating body (7), and tapered tapered surfaces (20, 21) are formed on the inner surface of the clamping member (14) and the outer surface of the sliding body (15). Then, the end of the hose (2) is fitted to the outside of the sliding body (15) inside the clamping member (14), and the sliding body (15) is moved forward with respect to the rotating body (7). The hose end attachment in a water pressure test of a hose according to claim 1, characterized in that the end portion of the hose (2) is clamped between the tapered surfaces (20, 21) by sliding. Metal fittings The rotating body (7) has a pair of opposing plates (9, 10) opposed to each other in the front-rear direction and a cylindrical body (11) connecting outer peripheral portions of the opposing plates (9, 10). The clamping member (14) is attached to a mounting cylinder (13) projecting from the front portion of the opposing plate (9), and the sliding body (15) has a flange (16, 17) and the flange ( 16 and 17), the rear flange (17) is fitted to the inner surface of the cylindrical body (11), and the front flange (16) is connected to the mounting cylinder (16). 13) is fitted to the inner surface of the front plate and pressurizes the pressure fluid into the space (31, 32) between the front facing plate (9) and the front or rear flange (16, 17). By sliding the sliding body (15) back and forth with respect to the rotating body (7), the hose (2) Wherein the supermarkets surfaces (20, 21) between the to be detachable, mounting bracket of the hose end in the pressure test of the hose according to claim 2 The hose end mounting bracket in a hydraulic test of a hose according to claim 3, wherein the rear flange (17) has a larger diameter than the front flange (16). The said bearing (6) and the rotary body (7) are provided with a pointer (33) and a scale for displaying the rotation angle of the rotary body (7) with respect to the bearing (6). Hose end fitting in the water pressure test of the hose described in 3 or 4 The exhaust pipe (34) leading from the upper part in the end part of the hose (2) to the outside of the rear wall surface of the bearing (6) is provided. Hose end fittings in the hose hydraulic test

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