JP4834423B2 - Connection fitting with safety mechanism and water supply hose - Google Patents

Description

  In particular, the present invention is a safety system for connecting a large capacity water supply hose and a pump device and a water supply hose used in a large capacity foam radiation system that can cope with a large fire such as when a fire occurs in an oil storage tank of a petroleum complex. The present invention relates to a connection fitting with a mechanism and a water supply hose.

The oil complex is equipped with several tens of oil storage tanks, but the size of each oil storage tank is 83m in diameter, 24m in height, and 120,000 kiloliters in capacity. Assuming that a fire has occurred in the oil storage tank of a large-scale oil complex in this way, the existing firefighting equipment including firefighting pumps and firefighting hoses have a water discharge of about 2,000 L / min. It is said that a high-capacity foam radiation system of 10,000 to 30,000 L / min is necessary.
In addition, assuming a fire in an oil storage tank of an oil complex, a large capacity water discharge is required, but it is a long distance of several kilometers from the water source to the oil storage tank. Need to be watered by. However, when a large volume of water is sent over a long distance, the pressure loss of the water supply hose naturally increases. Therefore, in order to reduce the pressure loss as much as possible, the diameter of the water supply hose is increased and the diameter of the connection fitting is increased (name 300). , 200). Furthermore, it is required to install a water pump and a pressure pump in the middle of the water supply path by the water supply hose, pressurize to a predetermined pressure, and guide it to the water cannon.
FIG. 12 shows a schematic configuration of a large-capacity bubble radiation system, 11 is a water source such as the sea and a lake, and 12 is land. Reference numeral 13 denotes a fire site of an oil storage tank of an oil complex several km away from the water source 11. A submersible pump 14 is installed in the water source 11, and the submersible pump 14 is driven by an engine generator 15 installed on the land 12. A water pump 16 is installed on the land 12, and a discharge port 17 of the submersible pump 14 and a suction port 18 of the water pump 16 are connected by a water hose 19.
The submersible pump 14 is provided with, for example, four discharge ports 17, and the water supply pump 16 is provided with, for example, four suction ports 18. The discharge port 17 and the suction port 18 are connected by four water supply hoses 19 having a diameter of 6 inches and a length of 10 m. The water pump 16 is connected to the pressurized pump 20 installed on the land 12 near the fire site 13 and far away from the water pump 16 via the water supply path 21.

  The water supply path 21 connecting the water supply pump 16 and the pressure pump 20 will be described. The water supply pump 16 is provided with, for example, four discharge ports 22, and the pressure pump 20 is provided with, for example, four suction ports 23. It has been. Each discharge port 22 of the water supply pump 16 is connected to one end of four water supply hoses 24 having a diameter of 6 inches and a length of 50 m, and the other ends of these water supply hoses 24 are connected to the first manifold 25. ing. The first manifold 25 is connected to one end of two water supply hoses 26 having a diameter of 8 inches and a length of 1000 m, and the other end of the water supply hose 26 is connected to the second manifold 27. The second manifold 27 is connected to one end of four water supply hoses 28 having a diameter of 6 inches and a length of 10 m, and the other ends of the water supply hoses 28 are connected to the suction port 23 of the pressure pump 20.

  On the other hand, 29 is a stock solution transport vehicle equipped with a tank 30 containing a fire extinguishing liquid for an oil storage tank. The tank 30 of this stock solution transport vehicle 29 has a diameter of 3 inches and a length of 10 m. One end of the rubber suction pipe 31 is connected, and the other end of the rubber suction pipe 31 is connected to the suction port 33 of the stock solution pump 32. The discharge port 34 of the stock solution pump 32 is connected to one end of two cloth hoses 35 having a diameter of 2.5 inches and a length of 10 m. The other ends of the cloth hoses 35 are pressurized pumps via a mixer 36. It is connected to 20 undiluted solution suction ports 37, and water sucked up from the water source 11 and the extinguishing undiluted solution are mixed to form a extinguishing solution.

  The pressure pump 20 is provided with, for example, four discharge ports 38. For example, four connection joints 41 are provided in the manifold 40 of the water cannon 39. Each discharge port 38 of the pressurizing pump 20 and each connection joint 41 of the manifold 40 of the water cannon 39 are connected by four water supply hoses 42 having a diameter of 6 inches and a length of 20 m. And it is comprised so that large-capacity foam may be radiated | emitted from the water cannon 39 toward the fire site 13, and it may extinguish.

  Each of the water supply hoses 24, 28, 42, etc. is provided with connection joints 43 at both ends, and is detachably connected to pumps via the connection joints 43, depending on the situation of fire fighting activities. , 42 can be increased or decreased. Further, a connection joint 43 is provided via a valve 44 at the discharge ports 22 and 38 of the water pump 16 and the pressure pump 20.

By the way, during a fire extinguishing operation by the large-capacity foam radiation system configured as described above, water leakage occurs from the connection portion between the connection joint 43 and the water supply hoses 24 and 42 for some reason, or the connection joint 43 itself is damaged. Water leakage may occur. For example, when one of four connection joints 43 connected to the connection joint 41 of the manifold 40 closest to the water cannon 39 is damaged and water leaks, an operator operating the water cannon 39 Report the situation to the commander and stop the operator who has monitored the pressurizing pump 20 by radio or the like after dropping the pump rotation, and the water pump 16 and the submersible pump 14 will stop and water will leak. The four valves 44 connected to the four hoses including the water supply hose 42 are instructed to close. Next, the operator who monitors the water pump 16 is instructed to stop the pump rotation after dropping it, and then the operator who monitors the submersible pump 14 is instructed to stop the pump rotation after dropping it. To do.
The operator who is monitoring the pressurizing pump 20 that has received the instruction is connected to four hoses including the water supply hose 42 that has leaked water since the water pump 16 and the submersible pump 14 stopped. However, if the four valves 44 are closed while the water pump 16 and the submersible pump 14 are rotating at high speed, the water hoses 24, 26, 28 are connected to the water pump 16. There is a possibility that not the rated pressure but a high cutoff pressure is applied and the water supply hoses 24, 26, 28 are damaged or the connection fittings 43 attached to these hoses are damaged.
The water pressure hoses 24, 26, 28, and 42 need to have a high pressure resistance on the assumption that a high pressure as described above is applied to these water supply hoses 24, 26, 28, and 42. The same applies to the water supply path 21 that connects the pump 20, and the water supply hoses 24, 28, and 42 need to increase the pressure resistance on the assumption that the high pressure as described above is applied, but the pressure resistance is high. The water supply hoses 24, 26, 28, and 42 are expensive and have a problem that they are heavy and difficult to handle.
Also, if the water supply hoses 24, 26, 28, 42 are damaged or the connection fittings 43 attached to these hoses are damaged and disconnected, the water supply pressure may cause the tip of the water supply hose 42 to be exposed to danger. There is a problem of being accompanied by sex.
The present invention has been made paying attention to the above circumstances, and the purpose of the present invention is to cause water leakage from the connection portion between the connection joint and the water supply hose or damage to the connection joint during a fire fighting operation. Even if water leaks and high pressure is applied to the remaining water supply hoses, the water supply hoses and connection joints will not be damaged, and the connection fittings and water supply hoses with safety mechanisms that can improve safety are provided. is there.

In order to achieve the above-mentioned object, the invention of claim 1 includes a connection fitting main body having a connection portion connected to a hose, a pipe or a fluid device at both axial end portions, and having a fluid passage formed therein,
A branch pipe provided in the connection fitting main body and having a branch passage communicating with the fluid passage;
A safety mechanism that is provided in the branch pipe and is incorporated in a fitting that is detachably connected to the branch pipe , and discharges an internal fluid to the outside when the internal pressure of the branch passage exceeds a set pressure;
Comprising
One of the connection parts of the connection fitting body is coupled by a tightening ring in a state fitted to the end of a hose or piping,
The other connecting portion of the connection fitting body includes a pair of coupling fitting bodies, a plurality of fitting projections arranged in the circumferential direction of the coupling fitting body and projecting in the axial direction, and between the fitting projections. The fitting projections and the fitting recesses of the pair of coupling metal bodies are fitted together in the axial direction into the fitting depressions and the fitting projections of the other coupling metal body. It is possible, and each fitting convex part has a latching part which latches to each other's thing, and each latching part is latched by the latching part of the other fitting metal fitting body. A connection fitting with a safety mechanism, wherein the connection fitting is a coupling fitting that restricts axial movement of the pair of fitting metal bodies .

The invention of claim 2 has a connection fitting main body having a connection portion connected to a hose, piping or fluid equipment at both ends in the axial direction, and having a fluid passage formed therein,
A branch pipe provided in the connection fitting main body and having a branch passage communicating with the fluid passage;
A safety mechanism that is provided in the branch pipe and discharges an internal fluid to the outside when an internal pressure of the branch passage exceeds a set pressure;
The branch pipe is two pipe bodies that are divided into a connecting metal body side part and a part incorporating the safety mechanism, and the two pipe bodies include a pair of coupling metal bodies and the coupling body. A plurality of fitting projections arranged in the circumferential direction of the metal fitting body and projecting in the axial direction, and fitting depressions formed between the fitting projections, and fitting the pair of fitting metal bodies The protrusions and the fitting recesses can be fitted in the fitting recesses and the fitting protrusions of the mating fitting main body on the other side in the axial direction, and each of the fitting protrusions is engaged with each other. Each locking portion is coupled by a coupling fitting that restricts the movement of the pair of coupling fitting main bodies in the axial direction by being locked to the locking portion of the mating coupling fitting main body. This is a connection fitting with a safety mechanism.

According to a third aspect of the present invention, in the connection bracket with a safety mechanism according to the first or second aspect, the safety mechanism is provided in a state where the branch passage is closed in the branch pipe, and an internal pressure of the branch passage is set. It is a rupture disc that ruptures when the pressure exceeds the pressure and releases the internal fluid to the outside .

According to a fourth aspect of the present invention, in the connection bracket with a safety mechanism according to the first or second aspect, the safety mechanism is provided in the branch pipe and is opened when an internal pressure of the branch passage is equal to or higher than a set pressure. It is a pressure valve for releasing the internal fluid to the outside .

The invention of claim 5 is a water supply hose comprising a hose body and a connecting metal fitting body provided at both ends of the hose body and having a fluid passage connecting the hose bodies to each other or the hose body and a fluid device.
A branch pipe having a branch passage communicating with the fluid passage is provided in at least one of the connection fitting main bodies, and a safety mechanism for discharging the internal fluid to the outside when the internal pressure of the branch passage exceeds a set pressure; Provided,
The branch pipe is two pipes divided into a part on the side of the connection fitting main body and a part into which the safety mechanism is incorporated. The two pipes include a pair of connection fitting main bodies and a periphery of the connection fitting main body. A plurality of fitting projections arranged in a direction and projecting in the axial direction, and fitting recesses formed between the fitting projections, and fitted with the fitting projections of the pair of coupling metal bodies The mating recesses can be fitted in the mating recesses and the mating projections of the mating fitting body on the other side in the axial direction, and each mating projection has a locking portion that latches with the mating one. Each of the locking portions is coupled with a coupling metal that restricts the movement of the pair of coupling metal bodies in the axial direction by engaging with the locking part of the coupling metal body on the other side. It is a water supply hose.

According to a sixth aspect of the present invention, in the water supply hose according to the fifth aspect, the safety mechanism is provided in a state where the branch passage is closed in the branch pipe, and bursts when the internal pressure of the branch passage is equal to or higher than a set pressure. Thus, the rupture disc releases the internal fluid to the outside .

A seventh aspect of the present invention is the water supply hose according to the fifth aspect, wherein the safety mechanism is provided in the branch pipe and opens when the internal pressure of the branch passage is equal to or higher than a set pressure to release the internal fluid to the outside. It is a pressure valve to be made.

  According to the present invention, during a fire extinguishing operation, water leakage occurs from the connection portion between the connection joint and the water supply hose for some reason, or the connection joint is damaged to cause water leakage, and high pressure is applied to the remaining water supply hose. However, the water supply hose and the connection joint are not damaged, and the safety can be improved.

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

1 and 2 show a first embodiment, FIG. 1 is a side view of a part of a connection fitting 50 with a safety mechanism, and FIG. 2 shows a water cannon 39 of the large-capacity foam radiation system shown in FIG. It is a schematic block diagram of the state which connected the connection metal fitting 50 with a safety mechanism of this invention to the connection coupling 41 of the manifold 40 nearest.
A connection fitting main body 51 shown in FIG. 1 is a T-shaped tube formed of a metal material such as aluminum, for example, and a first connection portion 53 is provided at one end portion of a fluid passage 52 along the axis O, and the other end portion. A second connecting portion 54 is provided. Further, a branch pipe 55 orthogonal to the axis O of the connection fitting main body 51 is integrally provided, and the branch pipe 55 is provided with a branch passage 56 communicating with the fluid passage 52.

  A plurality of annular convex portions 57 are provided on the outer peripheral surface of the first connection portion 53 of the connection fitting main body 51. An end of a water supply hose 42, for example, a fire hose 58, is fitted to the first connection portion 53, and the end of the fire hose 58 is connected to the first connection by a tightening ring 60 via a mouth reinforcing cloth 59. It is fixed to the part 53.

  The second connection portion 54 of the connection fitting main body 51 is connected to the connection joint 41 of the manifold 40 via a connection fitting 61 known from, for example, Japanese Patent No. 3375315. In the present embodiment, the four water supply hoses 42 are connected to the connection joint 41 of the manifold 40 via the coupling fitting 61, but one of the water supply hoses 42 is connected to the connection fitting 50 with a safety mechanism. It is connected to the coupling fitting 61 via

A bursting plate 62 is provided at the distal end of the branch pipe 55 of the connection fitting body 51 as a safety mechanism for releasing the internal fluid to the outside when the internal pressure of the branch passage 56 exceeds the set pressure. That is, a flange 64 having a bolt hole 63 is provided at the tip of the branch pipe 55. A flange 66 having a bolt hole 65 is joined to the flange 64 via the rupturable plate 62, and the flange 64 and the flange 66 are joined by a plurality of bolts 67 inserted through the bolt holes 63 and 65. The flange 66 has an opening 66a so that the central portion of the rupturable plate 62 is exposed, and the bulging portion 62a of the rupturable plate 62 faces the opening 66a. The rupturable plate 62 is made of a thin metal plate and normally closes the branch passage 56. However, when the internal pressure of the branch passage 56 exceeds a set pressure, the rupturable plate 62 is ruptured to release the internal fluid to the outside.
The coupling fitting 61 is composed of a pair of coupling fitting main bodies 67a and 67b having the same structure. Each of the coupling fitting main bodies 67a and 67b includes a cylindrical main body 68, and the cylindrical main bodies 68 have a cylindrical shape. None, a seal member 69 such as a rubber packing is attached to the front end. Accordingly, when these coupling metal bodies 67a and 67b are fitted and coupled to each other in the axial direction, the seal member 69 is abutted with each other, and the inside of these cylinder main bodies 68 communicates with each other and the sealing performance is maintained. .

  A plurality of, for example, six fitting projections 70 are integrally projected from the front end portion of the cylinder body 68. These fitting projections 70 are arranged at equal intervals in the circumferential direction and protrude in the axial direction from the seal member 69. Further, a space between these fitting projections 70 is formed as a fitting recess 71. When these fitting metal bodies 67a and 67b are abutted in the axial direction, one fitting metal body 67a The fitting projection 70 is fitted in the fitting recess 71 of the other coupling metal body 67b, and the fitting projection 70 of the other coupling metal body 67b is fitted in the fitting recess 71 of the one coupling metal body 67a. Mates and fits in a complementary fashion.

  In this case, the width of the fitting recess 71 is slightly wider than the width of the fitting projection 70. Accordingly, the fitting convex portions 70 are fitted in the fitting concave portions 71 in the axial direction, and are also rotatable by a predetermined amount in the circumferential direction.

  Further, one side surface 70a of the fitting convex portion 70 is formed with a stepped hook-like locking hook portion 72, which is in the circumferential direction with respect to the locking hook portion of the mating protruding portion on the other side. It is configured to engage. Therefore, in a state in which these fitting convex portions 70 are fitted in the mating fitting concave portions 71 in the axial direction, the coupling metal bodies 67a and 67b are rotated with respect to each other, and one of the fitting convex portions 70 is rotated. When the side surfaces 70a are close to each other, the locking collars 72 are engaged with each other to lock in the axial direction, and the coupling metal bodies 67a and 67b are coupled to each other.

  Further, the locking surfaces of these locking hooks 72 are inclined in an overhanging manner by a predetermined angle with respect to the circumferential direction, and these coupling metal bodies 67a are caused by internal water pressure or the like in a state where they are fitted. , 67b are separated from each other, a rotational force is generated in a direction in which the side surfaces 70a are pressed against each other, so that these locking hooks 72 are fitted more strongly, and the coupling metal bodies 67a, 67b It is configured to surely prevent the omission or the like.

  The dimensions of each part are set so that a gap is formed between the front end face of the fitting convex part 70 and the back wall surface of the fitting concave part 71 in the state where the locking collar part 72 is fitted. Yes. Therefore, this can move so that these fitting convex part 70 and fitting concave part 71 may mutually enter into the direction of an axis from the state where the above-mentioned locking collar part 72 was engaged.

  Moreover, the other side surface 70b of these fitting convex part 70 inclines with respect to the axial direction of these coupling metal main bodies 67a and 67b. Therefore, the fitting convex portion 70 is formed in a taper shape such that the circumferential width becomes narrower as it goes to the tip portion, and the fitting concave portion 71 similarly has a circumferential width as it goes to the inner portion. Is formed in a taper shape such that becomes narrower. Thereby, fitting of these fitting convex part 70 and fitting recessed part 71 becomes easy. One side surface on which the locking collar 72 is formed is formed substantially parallel to the axial direction of the coupling metal bodies 67a and 67b.

  Further, an urging mechanism 73 is provided on each of the other side surfaces 70b of the fitting convex portions 70. These urging mechanisms 73 are composed of steel balls 74 and springs (not shown) that urge the steel balls 74 in the protruding direction. Embedded in the other side. Therefore, when these fitting projections 70 are fitted into the mating fitting recess 71, the steel balls 74 are brought into contact with each other and pressed against each other, and the other side surfaces of these fitting projections 70 are moved. The side surfaces 70a of the fitting projections 70 are urged so as to be close to each other, and as described above, the locking collars 72 on these one side surfaces are engaged with each other. It is energized to unite.

  A plurality of tool grooves 75 are formed on the outer peripheral surfaces of the coupling metal bodies 67a and 67b. These tool grooves 75 are formed in a shape that can be fitted with a tool such as a wrench. In the unlikely event that the coupling metal bodies 67a and 67b cannot be uncoupled due to sand or the like, a tool such as a wrench is fitted into these tool grooves 75, and the coupling metal bodies 67a and 67b. The connection can be released by forcibly turning.

According to the first embodiment described above, the fire extinguishing liquid that circulates through the fire hose 58 circulates to the connection joint 41 of the manifold 40 through the fluid passage 52 of the connection fitting body 51. The large-capacity foam can be radiated toward the fire site 13 by the water cannon 39 to extinguish the fire.
At this time, the fluid passage 52 of the connection fitting main body 51 communicates with the branch passage 56, and the rupture plate 62 is provided in the branch pipe 55 that forms the branch passage 56. Always receive the pressure of the fire extinguishing liquid. Therefore, when the hydraulic pressure of the fire extinguishing liquid flowing through the fluid passage 52 exceeds a set value for some reason, the bulging portion 62a of the rupturable plate 62 is ruptured and the fire extinguishing liquid flowing through the fluid passage 52 passes through the branch passage 56. Released to the outside.
As described above, when the hydraulic pressure of the fire extinguishing liquid flowing through the fluid passage 52 exceeds a set value, the bursting plate 62 ruptures as a safety mechanism, thereby reducing the hydraulic pressure of the fire extinguishing liquid flowing through the fluid passage 52, and the like. The large hydraulic pressure exceeding the set value is not applied to the fire hose 58, the connection fitting main body 51, and the like. For this reason, it is not necessary to manufacture the fire hose 58 as a hose that can withstand more pressure than necessary, and the same applies to the connection fitting main body 51 and the like, and the cost can be reduced.

  3 and 4 show a second embodiment, and are side views in which a part of the connection fitting with safety mechanism 76 is cut, and FIG. 4 is a longitudinal side view in a state in which a rupturable plate 62 is provided on the coupling fitting main body 67b. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. In the present embodiment, as shown in FIGS. 3 and 4, the connection fitting body 77 is a T-shaped tube formed of a metal material such as aluminum, and is attached to one end portion of the fluid passage 78 along the axis O. One connecting portion 79 is provided, and the second connecting portion 80 is provided at the other end. Further, a branch pipe 81 orthogonal to the axis O of the connection fitting main body 77 is integrally provided, and a branch passage 82 communicating with the fluid passage 78 is provided in the branch pipe 81.

The first connecting portion 79, the second connecting portion 80, and the branch pipe 81 are provided with a connecting fitting 61 having the same structure as the connecting fitting 61 provided in the second connecting portion 54 of the first embodiment. . Further, of the pair of coupling metal bodies 67a and 67b of the coupling metal 61 provided in the branch pipe 81, the internal pressure of the branch passage 82 of the branch pipe 81 is set in the cylinder body 68 of the coupling metal body 67b provided outside. As a safety mechanism for releasing the internal fluid to the outside when the pressure is exceeded, a rupturable plate 62 similar to that of the first embodiment is provided. The rupturable plate 62 is ruptured when the internal pressure of the branch passage 82 exceeds the set pressure, and discharges the internal fluid to the outside.
According to the second embodiment described above, the rupturable plate 62 as a safety mechanism is provided on the branch pipe 81 via the coupling fitting 61. Therefore, when the rupturable plate 62 is ruptured and replaced with a new rupturable plate 62, the coupling metal body 67b is removed from the coupling metal body 67a, the bolt 67 of the coupling metal body 67b is loosened, and the flange 66 is separated from the flange 64. Can be easily removed, and workability can be improved. Further, by preparing a plurality of rupture plates 62 set on a tie fitting body 67b that can be attached to and detached from the tie fitting main body 67a, the rupture plate 62 is ruptured and replaced with a new rupture plate 62. It is only necessary to connect the coupling metal body 67b to the coupling metal body 67a, and the workability can be further improved.
5 and 6 show a cap for closing the branch passage 82 of the branch pipe 81 when the safety mechanism is not used in the third embodiment, FIG. 5 is a side view of a part of the cap, and FIG. 6 is a cap. The same components as those of the second embodiment are denoted by the same reference numerals and description thereof is omitted. In this embodiment, as shown in FIG. 5 and FIG. 6, the cap 83 that can be attached to and detached from the coupling metal body 67a attached to the branch pipe 81 closes the opening to the tube main body 68 of the coupling metal body 67b. A disk-shaped cap liner 84 is fixed by screwing.

A seal member 85 is attached to the cap liner 84. When the coupling metal body 67b is coupled to the coupling metal body 67a attached to the branch pipe 81, the seal member 69 of the coupling metal body 67a and the seal member of the cap liner 84 are connected. 85 is joined, and the branch passage 82 of the branch pipe 81 is closed by a cap 83. Reference numeral 86 denotes a handle protruding from the tube main body 68 of the coupling metal body 67b, so that the coupling can be released by grasping the handle 86 and forcibly rotating the coupling metal body 67b. It has become.
FIGS. 7 to 9 show a fourth embodiment, FIG. 7 is a front view of the coupling fitting, and FIG. 8 is a sectional view showing a pair of coupling fittings taken along the line ABC in FIG. 9 is a side view, partly in cross section, of a state in which a hose connection tube is combined with a coupling fitting.

  As shown in FIGS. 7 and 8, the coupling fitting 91 is composed of a pair of coupling fitting bodies 87a and 87b having the same structure, and each of the coupling fitting bodies 87a and 87b includes a cylinder body 88. These cylindrical main bodies 88 have a cylindrical shape, and, for example, two engagement convex portions 89 are provided so as to protrude in the axial direction at a point-symmetrical position about the axis O at the front end portion. These engagement convex portions 89 are provided with substantially L-shaped engagement flange portions 89 a that protrude in the outer peripheral direction of the tube main body 88.

  A fitting recess 90 that is wider and deeper than the engaging protrusion 89 is provided on the right side of the engaging protrusion 89 so that the engaging protrusion 89 is fitted. An engagement receiving portion 92 is provided in the circumferential direction of the cylinder main body 88 further to the right of the fitting recess 90. The engagement receiving part 92 protrudes along the longitudinal direction of the concave groove 93 so as to narrow the opening width of the concave groove 93, and the engagement flange part 89a. It is comprised from the engaging edge part 93a to engage.

The engaging edge 93a is provided with an inclined surface 94 and a stopper 95 so that the axial thickness of the cylinder main body 88 gradually increases from the fitting recess 90 in the clockwise direction. Then, when the engagement convex portion 89 of one coupling metal body 87a is fitted into the fitting recess 90 of the other coupling metal body 87b and the coupling metal bodies 87a and 87b are rotated relatively clockwise, When the flange portion 89a engages with the engagement edge portion 93a and the engagement flange portion 89a approaches the upward slope of the inclined surface 94, the coupling metal bodies 87a and 87b are pulled toward each other in the axial direction and the front end surfaces are joined to each other. It is supposed to be.
Further, as shown in FIG. 9, when connecting, for example, a fire hose or the like to the coupling metal bodies 87a and 87b, hose connection pipes 96 are provided on the coupling metal bodies 87a and 87b. The hose connection tube 96 is provided with a flange 98 at the front end of the connection tube main body 97 inserted into the tube main body 88 of the coupling metal bodies 87a and 87b, and a packing or the like is provided at the front end of the flange 98. An annular groove 100 in which the sealing member 99 is mounted is provided. Further, an annular convex portion 102 for retaining is provided on the outer peripheral surface of the cylinder 101 to which the end portion of the fire hose (not shown) is fitted and connected at the rear end portion of the connection tube body 97. Reference numeral 103 denotes a retaining ring for preventing the coupling metal bodies 87a and 87b and the hose connecting pipe 96 from being separated.

  Accordingly, when the coupling metal bodies 87a and 87b are coupled in the state where the hose connection pipe body 96 is combined with the coupling metal bodies 87a and 87b, when the coupling metal bodies 87a and 87b are pulled in the axial direction, the seal member 99 is obtained. They are in close contact with each other and are liquid-tightly coupled.

  FIG. 10 shows a fifth embodiment, which is a longitudinal side view of a pressure valve as a safety mechanism, and is configured to be coupled to a flange 64 of the branch pipe 55 in the first embodiment by a bolt 67. That is, the connection body 113 having the flange 112 is provided on the valve body 111 of the pressure valve 110. The connecting pipe 113 is provided with a fluid passage 115 having a valve seat 114 protruding into the valve main body 111, and the fluid passage 115 passes through the valve seat 114 to an escape hole 116 provided in a lower portion of the valve main body 111. Communicate.

  A valve body 117 that opens and closes the fluid passage 115 is provided in the valve seat 114 so as to be able to contact and separate. The valve body 117 is supported by a valve rod 118. A spring receiver 119 is provided in the middle of the valve stem 118, and the spring receiver 119 supports a lower end portion of a coil spring 120 fitted into the valve stem 118.

Further, a valve stem support case 121 is provided at the top of the valve body 111, and a screw hole 122 through which the valve stem 118 is inserted is provided at the bottom of the valve stem support case 121. An adjustment screw member 123 fitted to the valve rod 118 is screwed into the screw hole 122, and the adjustment screw member 123 is joined to the upper end portion of the coil spring 120 via a spring retainer 124. Then, by rotating the adjustment screw member 123 to move up and down, the urging force of the coil spring 120 is adjusted, and the set pressure at which the valve body 117 is opened can be adjusted. Reference numeral 125 denotes a cap.
The pressure valve 110 as a safety mechanism configured as described above can be coupled to the flange 64 of the branch pipe 55 in the first embodiment by a bolt 67. Therefore, when the hydraulic pressure of the fire extinguishing liquid flowing through the fluid passage 115 exceeds a set value, the valve body 117 is pushed up against the biasing force of the coil spring 120 and is separated from the valve seat 114, thereby A part of the fire extinguishing liquid flowing is discharged to the outside through the escape hole 116. Therefore, the fluid pressure flowing through the fluid passage 115 is reduced, and a large fluid pressure exceeding the set value is not applied to other fire hose, the connecting metal fitting body, or the like. For this reason, it is not necessary to manufacture the fire hose as a hose that can withstand pressure more than necessary, and the same applies to the connection fitting body and the like, and the cost can be reduced.

  FIG. 11 shows a sixth embodiment, which is a longitudinal side view of a pressure valve as a safety mechanism, and is configured such that the pressure valve 130 is coupled to the branch pipe 81 in the second embodiment by a coupling fitting 132. Yes. That is, the fitting main body 132 is provided on the valve main body 131 of the pressure valve 130. A fluid passage 135 having a valve seat 134 protruding inside the valve body 131 is provided.

A valve body 136 that opens and closes the fluid passage 135 is provided in the valve seat 134 so as to be able to contact and separate, and the valve body 136 is provided with a valve rod 137 that protrudes upward. The valve stem 137 is supported in a through hole 140 of an adjustment screw member 139 screwed into the female thread portion 138 of the valve main body 131 so as to advance and retract in the axial direction. Between the lower surface of the adjusting screw member 139 and the upper surface of the valve body 136, a coil spring 141 fitted into the valve rod 137 is interposed in a compressed state. Then, by rotating the adjustment screw member 139 to move up and down, the urging force of the coil spring 141 is adjusted, and the set pressure at which the valve body 136 is opened can be adjusted. Reference numeral 142 denotes an escape hole provided in the peripheral wall of the valve main body 131 and communicates with the fluid passage 135.
The pressure valve 130 as a safety mechanism configured as described above can be coupled to the branch pipe 81 in the first embodiment by the coupling fitting 132. Therefore, when the hydraulic pressure of the fire extinguishing liquid flowing through the fluid passage 135 exceeds a set value, the valve body 136 is pushed up against the urging force of the coil spring 141 and separated from the valve seat 134, thereby A part of the fire extinguishing liquid that flows is discharged to the outside through the escape hole 142. Therefore, the fluid pressure flowing through the fluid passage 78 is reduced, and a large fluid pressure exceeding the set value is not applied to the other fire hose, the connection fitting main body, or the like. For this reason, it is not necessary to manufacture the fire hose as a hose that can withstand pressure more than necessary, and the same applies to the connection fitting body and the like, and the cost can be reduced.

In each of the above embodiments, the connection fitting with a safety mechanism has been described. However, like a fire hose, the hose body is provided at both ends of the hose body. In the water supply hose comprising a connection fitting body having a fluid passage for connecting the fluid passage, a branch pipe having a branch passage communicating with the fluid passage is provided in the connection fitting body, and an internal pressure of the branch passage is set to a set pressure in the branch pipe. A similar effect can be obtained by providing a safety mechanism (rupture disk or pressure valve) that discharges the internal fluid to the outside when the pressure exceeds.
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 connection metal fitting with a safety mechanism. The schematic block diagram of the state which showed the embodiment and connected the metal fitting with a safety mechanism to the connection joint of the manifold nearest to the water cannon of the large capacity foam radiation system. The side view which showed the 2nd Embodiment of this invention and cut down a part of connection fitting with a safety mechanism. The vertical side view of the state which showed the same embodiment and provided the rupturable plate in the coupling metal fitting main body. The side view which showed the 3rd Embodiment of this invention and cut | disconnected some caps which block | close the branch channel | path of a branch pipe at the time of non-use of a safety mechanism. The bottom view of the cap which shows the same embodiment. The front view of the coupling metal fitting which shows the 4th Embodiment of this invention. Sectional drawing which shows a pair of coupling metal fittings which showed the embodiment and was cut along the line ABC of FIG. The side view which showed the same embodiment and showed the partial cross section of the state which combined the hose connection pipe body with the coupling metal fitting. The vertical side view of the pressure valve which shows the 5th Embodiment of this invention as a safety mechanism. The longitudinal cross-sectional side view of the pressure valve which shows the 6th Embodiment of this invention as a safety mechanism. The whole block diagram of a large-capacity bubble radiation system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 42 ... Water supply hose, 51 ... Connection metal fitting body, 52 ... Fluid passage, 55 ... Branch pipe, 56 ... Branch passage, 61 ... Coupling metal fitting, 62 ... Rupture disc (safety mechanism), 110 ... Pressure valve (safety mechanism)

Claims (7)

A connection fitting main body having a connection part connected to a hose, piping or fluid equipment at both ends in the axial direction and having a fluid passage formed therein,
A branch pipe provided in the connection fitting main body and having a branch passage communicating with the fluid passage;
A safety mechanism that is provided in the branch pipe and is incorporated in a fitting that is detachably connected to the branch pipe , and discharges an internal fluid to the outside when the internal pressure of the branch passage exceeds a set pressure;
Comprising
One of the connection parts of the connection fitting body is coupled by a tightening ring in a state fitted to the end of a hose or piping,
The other connecting portion of the connection fitting body includes a pair of coupling fitting bodies, a plurality of fitting projections arranged in the circumferential direction of the coupling fitting body and projecting in the axial direction, and between the fitting projections. The fitting projections and the fitting recesses of the pair of coupling metal bodies are fitted together in the axial direction into the fitting depressions and the fitting projections of the other coupling metal body. It is possible, and each fitting convex part has a latching part which latches to each other's thing, and each latching part is latched by the latching part of the other fitting metal fitting body. A connection bracket with a safety mechanism, wherein the connection bracket is a coupling bracket that restricts axial movement of the pair of coupling bracket bodies . A connection fitting main body having a connection part connected to a hose, piping or fluid equipment at both ends in the axial direction and having a fluid passage formed therein,
A branch pipe provided in the connection fitting main body and having a branch passage communicating with the fluid passage;
A safety mechanism that is provided in the branch pipe and discharges an internal fluid to the outside when an internal pressure of the branch passage exceeds a set pressure;
Comprising
The branch pipe is two pipes divided into a part on the side of the connection fitting main body and a part into which the safety mechanism is incorporated. The two pipes include a pair of connection fitting main bodies and a periphery of the connection fitting main body. A plurality of fitting projections arranged in a direction and projecting in the axial direction, and fitting recesses formed between the fitting projections, and fitted with the fitting projections of the pair of coupling metal bodies The mating recesses can be fitted in the mating recesses and the mating projections of the mating fitting body on the other side in the axial direction, and each mating projection has a locking portion that latches with the mating one. Each of the locking portions is coupled with a coupling metal that restricts the movement of the pair of coupling metal bodies in the axial direction by engaging with the locking part of the coupling metal body on the other side. Connection bracket with safety mechanism. The safety mechanism is a rupture plate that is provided in a state in which the branch passage is closed in the branch pipe, and ruptures when the internal pressure of the branch passage is equal to or higher than a set pressure to release the internal fluid to the outside. The connection fitting with a safety mechanism according to claim 1 or claim 2 . 3. The pressure mechanism according to claim 1, wherein the safety mechanism is a pressure valve that is provided in the branch pipe and opens when the internal pressure of the branch passage is equal to or higher than a set pressure, and discharges the internal fluid to the outside. Connection bracket with safety mechanism as described . In a water supply hose comprising a hose main body and a connecting metal fitting body having a fluid passage that is provided at both ends of the hose main body and connects between the hose main bodies or the hose main body and a fluid device,
A branch pipe having a branch passage communicating with the fluid passage is provided in at least one of the connection fitting main bodies, and a safety mechanism for discharging the internal fluid to the outside when the internal pressure of the branch passage exceeds a set pressure; Provided,
The branch pipe is two pipes divided into a part on the side of the connection fitting main body and a part into which the safety mechanism is incorporated. The two pipes include a pair of connection fitting main bodies and a periphery of the connection fitting main body. A plurality of fitting projections arranged in a direction and projecting in the axial direction, and fitting recesses formed between the fitting projections, and fitted with the fitting projections of the pair of coupling metal bodies The mating recesses can be fitted axially into the mating recesses and the mating projections of the mating fitting body on the mating side, and each mating projection has a locking part that latches with the mating one. Each of the locking portions is coupled with a coupling metal that restricts movement of the pair of coupling metal bodies in the axial direction by engaging with the engagement part of the coupling metal body on the other side. Water hose to do. The safety mechanism is a rupture plate that is provided in a state in which the branch passage is closed in the branch pipe, and ruptures when the internal pressure of the branch passage is equal to or higher than a set pressure to release the internal fluid to the outside. The water supply hose according to claim 5. The water supply mechanism according to claim 5, wherein the safety mechanism is a pressure valve provided in the branch pipe and opened when the internal pressure of the branch passage is equal to or higher than a set pressure to release the internal fluid to the outside. hose.

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