JP2007271049A - Mediating fitting for water supply hose - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mediating fitting for water supply hose enabling to easily couple coupling fittings at ends of water supply hoses, or a coupling fitting at an end of water supply hose and a coupling fitting of an apparatus of water supply facilities. <P>SOLUTION: A pair of mediating fitting main bodies 14, 15 provided with coupling parts 18, 21 on one ends of coupling tubes 17, 20 having circulation paths 16, 19 formed therein are coupled to the coupling tubes 17, 20 watertightly and in such a manner that the same can extend in an axial direction. Each coupling part 18, 21 of the pair of the mediating fitting main bodies 14, 15 can mediate and couple coupling fittings 34, 35 of end parts of water supply hose 12, 13 to be coupled. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a water hose intermediate fitting used when, for example, a large-capacity water hose such as a fire hose or a water pump and a mass water hose are combined.

  For example, a large-capacity water supply hose used for a large-capacity foam radiation system that can handle a large fire such as a fire in an oil storage tank of an oil complex, or a drainage pump connected to a drain pump when a natural disaster such as a flood occurs Among the large-capacity water supply hoses to be used, in particular, the large-capacity water supply hose has a diameter of 400 mm, a standard length of the hose of 150 m, and a mass of 10 kg / m.

  The large-capacity water supply hose is provided with coupling fittings at both ends of the hose body, and a plurality of water feeding hoses or a water feeding pump and a water feeding hose are coupled to each other via the coupling fitting. Such a large-capacity water supply hose is usually wound around the drum of an extension vehicle. During the extension, the drum is driven to rotate and the large-capacity water supply hose is turned to the ground etc. An operation to join each other is performed and it is extended to the target place.

  However, assuming that a fire has occurred in an oil storage tank in an oil complex, large-capacity water supply is required, but the distance from the water source to the oil storage tank is a few kilometers, and dozens of It is necessary to connect and extend a large capacity water supply hose.

Therefore, the large-capacity water supply hose wound around the drum of the extension vehicle is fed from the drum and tied to the ground etc., and the coupling brackets at the end of the hose are coupled to each other. When the distance between them is long, that is, when the metal fittings are to be connected to each other more than the connection allowance and cannot be connected, it is necessary to draw and connect the hose laid on the ground or the like.
However, as described above, a large-capacity water supply hose with a diameter of 400 mm has a mass of 10 kg / m. Therefore, it is extremely difficult to manually move (pull up) a large-capacity water supply hose once laid on the ground or the like. It is. If the coupling fitting provided at the end of the hose is forcibly pulled, the connection between the hose and the coupling fitting may be cracked or broken.
On the other hand, the applicant has developed a joint fitting composed of a pair of joint bodies with the same structure without distinction between males and females that connect fire hoses and other hoses to each other or between liquid transport pipes. Registered (for example, refer to Patent Document 1).
Japanese Patent No. 3107507

However, as described above, a large capacity water supply hose with a diameter of 400 mm has a mass of 10 kg / m. Therefore, it is extremely difficult to manually move (pull) the large capacity water supply hose once laid on the ground or the like. It is. If the coupling fitting provided at the end of the hose is forcibly pulled, the connection between the hose and the coupling fitting may be cracked or broken.
On the other hand, if a joint fitting that connects a pair of hose bodies having the same structure without distinction between males and females such as a fire hose shown in Patent Document 1 is employed, the pair of joint metal bodies are slightly connected in the axial direction. However, when the pair of metal fittings are separated by more than the coupling allowance, there is a similar problem.
The present invention has been made by paying attention to the above circumstances, and the purpose thereof is, for example, after feeding a large-capacity water supply hose wound around a drum of an extension car from the drum and placing it on the ground, etc. When joining the metal fittings at the end of the water supply hose, even when the gap between the metal fittings is separated, that is, even when trying to join the metal fittings, they are separated by more than the coupling allowance and cannot be connected. An intermediate fitting for a water supply hose that can be coupled without pulling the hose is provided.

  In order to achieve the above object, according to the present invention, a first aspect of the present invention provides a pair of intermediate metal fittings provided with a coupling portion at one end of a connecting cylinder in which a flow passage is formed. Are connected to each other so that the coupling portions of the pair of intermediate metal fittings are connected to each other between the fittings at the ends of the water supply hose to be connected or between the fittings at the end of the water supply hose and the fittings of the water supply equipment. It exists in the intermediate | middle metal fittings for water supply hoses characterized by enabling intermediary coupling | bonding between.

  According to a second aspect of the present invention, the coupling portion of the pair of intermediate bracket main bodies according to the first aspect is a coupling metal body having the same structure, and the coupling metal body has a plurality of fittings arranged in the circumferential direction and projecting in the axial direction. A fitting recess and a fitting recess formed between the fitting projections, and the fitting projection and the fitting recess of the fitting body are fitted with the fitting recess of the mating fitting body on the other side. A pair of fittings are fitted into the mating projections in the axial direction, and these fitting projections are locked in the circumferential direction with the fitting projections of the mating fitting body on the other side to restrict the movement in the axial direction. A locking collar for locking the main body in the axial direction is formed.

  According to a third aspect of the present invention, in the connecting portion of the pair of intermediate metal fitting bodies according to the first aspect, the connecting portion of one intermediate metal fitting body is a male connecting portion, and the connecting portion of the other intermediate metal fitting body is a female connecting portion. It is characterized by that.

  In a fourth aspect of the present invention, the connecting cylinder of the pair of intermediate metal fitting bodies according to any one of the first to third aspects has a double-pipe structure that fits in the axial direction so as to be extendable and contractible, and an expansion / contraction length adjusting mechanism that adjusts the expansion / contraction length. Is provided.

  According to a fifth aspect of the present invention, the adjusting mechanism according to the fourth aspect is a male screw portion provided on one side of the connecting cylinder and a female screw portion provided on the other side of the connecting cylinder, and is screwed together.

  A sixth aspect of the present invention is characterized in that the connecting cylinder according to any one of the first to fifth aspects is provided with a measuring device connection port communicating with the flow passage.

  According to a seventh aspect of the present invention, the measuring device connected to the measuring device connection port of the sixth aspect releases the fluid in the flow passage to the outside when the pressure gauge for detecting the pressure in the flow passage or the internal pressure exceeds a set value. It is a safety mechanism to perform, a pressure relief valve for draining residual water after water supply, or a mechanism for measuring the flow rate.

  In an eighth aspect of the present invention, in the pair of intermediate metal fittings according to any one of the first to fourth aspects, the coupling portion and the connection cylinder are formed of different members, and the connection portion is circumferential with respect to the connection cylinder. It is characterized by being freely rotatable.

  According to the present invention, for example, even for a large capacity water supply hose having a diameter of 400 mm and a mass of 10 kg / m, between the metal fittings at the ends of the water supply hose or between the metal fittings at the end of the water supply hose and the water supply equipment There is an effect that it is possible to easily join the fittings of the equipment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a first embodiment of a water hose intermediate metal fitting, 11 is a water supply hose intermediate metal fitting, 12 and 13 are, for example, a large capacity water supply having a diameter of 400 mm, a hose length of 150 m, and a mass of 10 kg / m. A hose. These large-capacity water hoses 12, 13 are used for large-capacity foam radiation systems that can respond to large fires such as when an oil storage tank fires in an oil complex, for example, or drain pumps when natural disasters such as floods occur It is assumed that the hose is connected to the hose.

  First, the water supply hose intermediate metal fitting 11 will be described. The water supply hose intermediate metal fitting 11 includes a first intermediate metal fitting body 14 and a second intermediate metal fitting body 15. The first and second intermediate bracket bodies 14 and 15 basically have the same structure, and the first intermediate bracket body 14 is provided with a connecting portion 18 at one end of a connecting cylinder 17 in which a flow passage 16 is formed. It has been. The second intermediate fitting body 15 is provided with a coupling portion 21 at one end of a connecting cylinder 20 in which a flow passage 19 is formed. The connecting cylinder 17 of the first intermediate fitting main body 14 is formed in a cylindrical shape by a metal tube, and the connecting cylinder 20 of the second intermediate fitting main body 15 is fitted inside the connecting cylinder 17.

  That is, the connecting cylinder 20 is formed in a cylindrical shape by a metal tube having a slightly smaller diameter than the connecting cylinder 17, and an external thread portion 22 is formed on the outer peripheral surface thereof, and the external thread portion 22 is screwed onto the inner peripheral surface of the connecting cylinder 17. An internal thread portion 23 is formed. Therefore, the connecting cylinders 17 and 20 have a double-pipe structure. For example, by fixing the second intermediate bracket body 15 and rotating the first intermediate bracket body 14, the male screw portion 22 and the female screw portion 23 are screwed. As a result, the connecting cylinders 17 and 20 extend and contract in the axial direction.

  Further, an annular groove 24 is provided on the outer peripheral surface at the distal end portion of the connecting cylinder 20, and an O-ring 25 that contacts the inner peripheral surface of the connecting cylinder 17 is attached to the annular groove 24. The connecting cylinders 17 and 20 are watertight. It is connected to. A measuring device connection port 31 is formed in the outer peripheral surface of the proximal end portion of the connecting cylinder 20, and a pressure gauge 32 for detecting the pressure of the flow passages 16 and 19 is provided in the connection port 31 as a measuring device, for example. ing.

  A safety mechanism such as a safety valve or a rupture valve is provided to discharge the fluid in the flow passages 16 and 19 to the outside when the internal pressure exceeds a set value instead of the pressure gauge 32 that detects the pressure in the flow passages 16 and 19. The intermediate metal fitting 11 for the water supply hose and the large capacity water supply hoses 12 and 13 may be protected. If the residual pressure remains after the water is supplied, the metal fitting cannot be removed smoothly. Therefore, a pressure relief valve may be attached so that the pressure in the hose can be released and then removed with a light operation. Moreover, you may attach apparatuses, such as a flow meter and various sensors.

  Further, the connecting portions 18 and 21 of the first and second intermediate fitting main bodies 14 and 15 have the same structure as the connecting fitting known from Japanese Patent No. 3107507, and are connected to the ends of the connecting cylinders 17 and 20. The cylinder body 26 is provided. The cylinder body 26 has a substantially cylindrical shape, and a plurality of, for example, six fitting protrusions 27 are integrally projected from the front end of the cylinder body 26. These fitting projections 27 are arranged at equal intervals in the circumferential direction of the cylinder body 26.

  Further, a space between these fitting convex portions 27 is formed as a fitting concave portion 28, and a stepped hook-like locking hook portion 29 is formed on one side surface 27 a of the fitting convex portion 27. . The leading end corners of the other side surface 27b of these fitting convex portions 27 are formed in an arc shape to form a guide portion 30.

  Further, an urging mechanism 33 is provided on each of the other side surfaces 27 b of these fitting convex portions 27. These urging mechanisms 33 are composed of steel balls and springs that urge the steel balls in the protruding direction, and these urging mechanisms 33 are embedded in the other side surface 27 b of the fitting convex portions 27. It is. Therefore, when these fitting convex portions 27 are fitted in the mating fitting concave portion 28, the steel balls come into contact with each other and are pressed against each other, and the other side surface 27b of these fitting convex portions 27 is moved. Energize away from each other. As a result, the one side surface 27a of the fitting convex portion 27 is urged so as to be close to each other, and the locking collar portion 29 of the one side surface 27a is urged to engage with each other. ing.

  When the coupling portion 18 and the coupling portion 34 and the coupling portion 21 and the coupling portion 35 are abutted in the axial direction, for example, the fitting convex portion 27 of one coupling portion 18 is fitted to the other coupling portion 34. The fitting protrusions 27 of the other connecting portion 34 are fitted into the fitting recesses 28 of the one connecting portion 18 and are fitted in a complementary manner. Similarly, the fitting convex portion 27 of one coupling portion 21 is fitted into the fitting concave portion 28 of the other coupling portion 35, and the fitting convex portion 27 of the other coupling portion 35 is fitted to the one coupling portion 21. It fits in the fitting recess 28 and fits in a complementary manner.

  Further, the end portions of the large-capacity water supply hoses 12 and 13 are provided with joint portions 34 and 35 having the same structure as the joint portions 18 and 21 of the first and second intermediate metal fitting main bodies 14 and 15, respectively. The same code | symbol is attached | subjected to the part. That is, the connecting portions 34 and 35 are provided with connecting pipes 34a and 35a protruding rearward, and the hose bodies 12a and 13a of the large capacity water supply hoses 12 and 13 are fitted and connected to the connecting pipes 34a and 35a.

The connecting portions 34 and 35 of the large capacity water supply hoses 12 and 13 are usually connected to each other when the large capacity water supply hoses 12 and 13 wound around the drum of the extension vehicle are drawn out from the drum and stretched to the ground or the like. Although it is coupled, there is a case where the coupling portions 34 and 35 of the large capacity water supply hoses 12 and 13 to be coupled are separated from each other so that the coupling portions 34 and 35 are separated by more than the coupling allowance and cannot be coupled. Arise.
In this case, the intermediate fitting 11 for the water supply hose is interposed between the connecting portion 34 and the connecting portion 35 of the large capacity water supply hoses 12 and 13. Then, the coupling portion 34 of the large-capacity water supply hose 12 and the coupling portion 18 of the water-feed hose intermediate fitting 11 are coupled, and the coupling portion 35 of the large-capacity water supply hose 13 and the coupling portion 21 of the water-feed hose intermediate fitting 11 are coupled. To do. Then, the large-capacity water supply hose 12 and the large-capacity water supply hose 13 are connected via the intermediate fitting 11 for the water supply hose, and the connecting portions 34 and 35 of the large-capacity water supply hoses 12 and 13 to be connected are separated from each other. But it can be easily combined. That is, the large capacity water supply hoses 12 and 13 can be coupled by the water supply hose intermediate metal fitting 11 without bringing the coupling part 34 and the coupling part 35 close to each other.

  Further, since the connecting cylinders 17 and 20 of the water hose intermediate metal fitting 11 are coupled by the male screw part 22 and the female screw part 23 being screwed together, for example, the connecting cylinder 20 is fixed and the connecting cylinder 17 is caught by a wrench. And the like, and the male screw part 22 and the female screw part 23 are screwed together, and the connecting cylinders 17 and 20 expand and contract in the axial direction. Accordingly, the axial length of the water supply hose intermediate fitting 11 can be adjusted according to the distance between the coupling portions 34 and 35 of the large capacity water supply hoses 12 and 13.

  FIG. 2 shows a second embodiment of the intermediate fitting for a water supply hose, and the same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. 41 is a water supply hose intermediate bracket, and 42 and 43 are large capacity water supply hoses having a diameter of 400 mm, a hose length of 150 m, and a mass of 10 kg / m, for example.

  The water hose intermediate metal fitting 41 will be described. The water hose intermediate metal fitting 41 is composed of a first intermediate metal fitting body 44 and a second intermediate metal fitting body 45. The first intermediate fitting main body 44 has a connecting cylinder 17 having a flow passage 16 formed therein, and a female coupling portion 46 is provided at one end of the connecting cylinder 17. The second intermediate fitting main body 45 includes a connecting cylinder 20 having a flow passage 19 formed therein, and a male coupling portion 47 is provided at one end of the connecting cylinder 20.

  Further, a male coupling portion 48 having the same structure as the male coupling portion 47 of the second intermediate fitting main body 45 is provided at the end of the large capacity water supply hose 42. A female coupling portion 49 having the same structure as the female coupling portion 46 of the first intermediate fitting main body 44 is provided at the end of the large capacity water supply hose 43. The male coupling portion 48 and the female coupling portion 49 are provided with connection pipes 48a and 49a protruding rearward, and the hose bodies 42a and 43a of the large capacity water supply hoses 42 and 43 are fitted and connected to the connection pipes 48a and 49a. Has been.

The male coupling portion 48 of the large-capacity water supply hose 42 and the female coupling portion 49 of the large-capacity water supply hose 43 usually feed out the large-capacity water supply hoses 42 and 43 wound around the drum of the extension vehicle from the drum. Are connected to each other when they are stretched while being connected to each other, but the distance between the male coupling portion 48 and the female coupling portion 49 of the large-capacity water supply hoses 42 and 43 to be coupled is separated so that both coupling portions 48 and 49 are connected. Even if it tries to combine, it may be separated from the coupling allowance and cannot be combined.
In this case, the water hose intermediate fitting 41 is interposed between the male coupling portion 48 and the female coupling portion 49 of the large-capacity water feeding hoses 42 and 43. Then, the male coupling portion 48 of the large capacity water supply hose 42 and the female coupling portion 46 of the water supply hose intermediate fitting 41 are combined, and the female coupling portion 49 of the large capacity water supply hose 43 and the intermediate fitting 41 for the water supply hose 41 are connected. The male coupling part 47 is coupled. Then, the large-capacity water supply hose 42 and the large-capacity water supply hose 43 are joined via the water-feed hose intermediate bracket 41, and the coupling portions 48, 49 of the large-capacity water supply hoses 42, 43 to be joined are separated from each other. Can be easily combined. That is, the large capacity water supply hoses 42 and 43 can be coupled by the water supply hose intermediate fitting 41 without bringing the male coupling portion 48 and the female coupling portion 49 close to each other.

In the above-described embodiment, the connecting cylinders 17 and 20 are screwed together with the male screw portion 22 and the female screw portion 23, and, for example, the second intermediate fitting main bodies 15 and 45 are fixed, and the first intermediate fitting main body 14 is fixed. 44, the male screw portion 22 and the female screw portion 23 are screwed together so that the connecting cylinders 17 and 20 expand and contract in the axial direction. However, this shows one embodiment and is limited. Is not to be done.
FIG. 3 shows the third embodiment, which is a modification of the first embodiment. The same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
The water hose intermediate metal fitting 50 will be described. The water supply hose intermediate metal fitting 50 is composed of a first intermediate metal fitting body 51 and a second intermediate metal fitting body 52. The first and second intermediate fitting main bodies 51 and 52 basically have the same structure. In the first intermediate fitting main body 51, the coupling portion 54 and the connecting cylinder 53 are separate members. The coupling portion 54 is formed to be rotatable in the circumferential direction. There is a thrust ball bearing between the coupling portion 54 and the connecting cylinder 53, and even if the hose internal pressure is applied, the thrust ball bearing receives the axial load, so that it can be rotated smoothly. The second intermediate fitting main body 52 includes a connecting cylinder 55 having a smaller diameter than the connecting cylinder 53 and a coupling portion 56 that is rotatable in the circumferential direction of the connecting cylinder 55. A connecting cylinder 55 of the second intermediate bracket body 52 is fitted inside the connecting cylinder 53 of the first intermediate bracket body 51. Therefore, the connecting cylinders 53 and 55 have a double-pipe structure. By rotating the connecting cylinders 53 and 55 relatively, the male screw portion 22 and the female screw portion 23 are screwed together, so that the connecting tubes 53 and 55 are pivoted. It expands and contracts in the direction.

  A flange portion 57 is integrally provided at an end portion of the connecting cylinder 53 of the first intermediate fitting main body 51. A fitting recess 58 provided on the inner peripheral surface of the coupling portion 54 is rotatably fitted to the flange portion 57, and the coupling portion 54 is prevented from coming off from the connecting cylinder 53. Similarly, a flange portion 59 is integrally provided at the end portion of the connecting cylinder 55 of the second intermediate metal fitting body 52. A fitting recess 60 provided on the inner peripheral surface of the coupling portion 56 is rotatably fitted to the flange portion 59, and the coupling portion 56 is prevented from coming off from the connecting cylinder 55.

Since the connection cylinders 53 and 55 of the first intermediate metal fitting body 51 and the second intermediate metal fitting main body 52 constituting the intermediate metal fitting 50 for the water supply hose are coupled by the male screw portion 22 and the female screw portion 23 being screwed together, By fixing the connecting cylinder 55 and rotating the connecting cylinder 53, the male screw part 22 and the female screw part 23 are screwed together, and the connecting cylinders 53 and 55 expand and contract in the axial direction. Accordingly, the axial length of the water hose intermediate fitting 50 can be adjusted according to the distance between the coupling portions 34 and 35 of the large capacity water supply hoses 12 and 13 as in the first embodiment. In addition, the coupling portions 54 and 56 need only be relatively rotated with the coupling cylinders 53 and 55 in a fixed state, and the operability can be improved.
In the above embodiment, the water hose intermediate bracket has been described for a large capacity water supply hose having a diameter of 400 mm, a hose length of 150 m, and a mass of 10 kg / m, but is limited to a large capacity water supply hose. It can also be applied to a standard fire hose.
Further, the case where the coupling fittings at the ends of the large-capacity water supply hose are mediated through the coupling fittings for the water supply hose has been described. It can also be mediated between the fittings of water transmission equipment.

  The present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, the constituent elements over different embodiments may be combined.

The side view which showed the 1st Embodiment of this invention and cut down a part of intermediate | middle metal fitting for water supply hoses. The side view which showed the 2nd Embodiment of this invention and crossed a part of intermediate | middle metal fittings for water supply hoses. The side view which showed the 3rd Embodiment of this invention and crossed a part of intermediate | middle metal fittings for water supply hoses.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 ... Intermediate | middle metal fitting for water supply hoses, 12, 13 ... Large capacity water supply hose, 14, 15 ... Intermediate metal fitting main body, 16, 19 ... Flow path, 17, 20 ... Connection pipe | tube, 18, 21, 34, 35 ... Joint part

Claims (8)

A pair of intermediate metal fittings provided with a coupling portion at one end of a connecting cylinder in which a flow passage is formed is connected to the connecting cylinder so as to be watertight and extendable in the axial direction.
Each coupling part of the pair of intermediate metal fittings can be intermediately coupled between the coupling metal parts at the ends of the water supply hoses to be connected or between the metal fittings at the end of the water supply hose and the metal fittings of the water supply equipment. An intermediate fitting for a water supply hose characterized by   The coupling portion of the pair of intermediate bracket main bodies is a coupling bracket body having the same structure. The coupling bracket body includes a plurality of fitting projections arranged in the circumferential direction and projecting in the axial direction, and the fitting projections. A fitting concave portion formed between the fitting fitting main body and the fitting convex portion and the fitting concave portion of the fitting body are fitted in the fitting concave portion and the fitting convex portion of the mating fitting main body in the axial direction. The fitting projections are engaged with the fitting projections of the mating fitting main body in the circumferential direction to restrict axial movement, and the pair of fitting fitting bodies are engaged in the axial direction. The intermediate fitting for a water supply hose according to claim 1, wherein a stop portion is formed.   2. The coupling portion of the pair of intermediate metal fittings is characterized in that the intermediate metal fitting body has a male connection portion and the other intermediate metal fitting portion has a female connection portion. Intermediate bracket for water hose.   The connecting cylinder of the pair of intermediate metal fittings has a double-pipe structure that fits in an axially stretchable manner, and is provided with an adjustment mechanism that adjusts the stretchable length. The metal fitting for water supply hoses as described in any one.   The intermediate fitting for a water supply hose according to claim 4, wherein the adjusting mechanism is a male screw part provided on one side of the connecting cylinder and a female screw part provided on the other side of the connecting cylinder and is screwed together.   6. The intermediate fitting for a water supply hose according to claim 1, wherein the connection cylinder is provided with a measuring device connection port communicating with the flow passage.   The measuring device connected to the measuring device connection port includes a pressure gauge that detects the pressure of the flow passage or a safety mechanism that discharges the fluid of the flow passage to the outside when the internal pressure exceeds a set value, or residual water after water supply. 7. The intermediate fitting for a water supply hose according to claim 6, which is a pressure release valve for removing air or a mechanism for measuring a flow rate.   The pair of intermediate metal fittings main body is composed of a coupling part and a connecting cylinder made of different members, and the coupling part is rotatable in the circumferential direction with respect to the coupling cylinder. The intermediate fitting for a water supply hose as described in one.

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