JPH0514783U - Flexible pipe fittings - Google Patents

Abstract

(57) [Summary] [Purpose] When connecting a straight pipe part of a flexible pipe and a pipe, it is possible to always keep the axes of both pipes parallel to each other and improve the workability of the connection. [Structure] A gasket 11 is interposed between an end surface of a pipe 4 and a flange 4 formed on a straight pipe portion 3 at an end of a flexible portion 2, and both inner diameters of both the straight pipe portion 3 and the pipe 7 are adapted to their inner diameters. By inserting the connecting sleeve 9 having the outer diameter, the axial centers of the straight pipe portion 3 and the pipe 7 are parallel to each other, and this state is maintained, and the locking edge 6 is locked to the flange 4. Tighten the nut 5 by engaging the screw 8 of the pipe 7. The connecting sleeve 9 has a groove
It is supported by the gasket 11 engaged with 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a flexible pipe joint made of stainless steel or the like used for connecting various kinds of pipes for supplying water or hot water to pipes for appliances.

[0002]

[Prior Art]

 When connecting pipes for water supply, hot water supply, etc. and pipes for faucets, water heaters, and other appliances, there are various cases in which the position and direction of the pipes are related. Therefore, the connection is made using a flexible pipe made of stainless steel or the like that can be bent arbitrarily. The connection between the flexible pipe and the piping or instrument piping is performed, for example, as shown in FIGS. 6 (A) and 6 (B).

In FIGS. 6 (A) and 6 (B), 21 is a flexible pipe, which is provided with a straight pipe portion 23 at the end of the flexible portion 22 and a flange 24 at the end edge of the straight pipe portion 23. Is configured. Reference numeral 25 is a connecting nut, and a locking edge 26 projectingly provided on the inner circumference of the end is locked to the flange 24 and is inseparably attached to the straight pipe portion 23. 27 is a pipe for equipment or water supply, and the flange 24 is overlapped with an end face of which a ring-shaped gasket 28 is interposed, and the nut 25 is engaged with a screw 29 provided in the pipe 27 and tightened. The flexible pipe 21 is connected to the pipe 27, and the gasket 28 seals. 30 is the axis of the straight pipe portion 23, and 31 is the axis of the instrument pipe 27.

[0004]

[Problems to be solved by the device]

 In the conventional flexible pipe joint, as shown in FIG. 6 (A), the straight pipe portion 23 is connected to the pipe 27 so that the straight pipe portion 23 and the pipe 27 have a substantially parallel axis 31. Then, since the flange 24 and the end surface of the pipe 27 are in parallel with each other, the entire circumference of the gasket 28 is evenly pressed to seal the seal substantially evenly. It's rare.

However, due to the connection conditions such as the relationship between the position and direction of the pipe and the device, or the fact that the straight pipe portion 23 can freely move at the time of connection, as shown in FIG. 6 (B). In addition, when the shaft center 30 of the straight pipe portion 23 is tilted with respect to the shaft center 31 of the pipe 27, the flange 24 is tightened with the nut 25 with the flange 24 being slightly tilted with respect to the end face of the pipe 27. Since it is in a so-called one-side tightening state, unevenness occurs in the pressurized state of the gasket 28, and the seal becomes insufficient. Therefore, there may be cases where water leakage occurs during the initial water passage after the connection ends, or water leakage does not occur during the initial water passage, but water leakage may occur after a certain period of time due to vibration of the equipment or flexible pipe 21. is there. If water leakage occurs in the initial water flow, the connection of the straight pipe portion 23 can be immediately corrected to prevent the occurrence of problems due to water leakage. However, if water leakage occurs after a certain period of time, there is a risk that the discovery will be delayed and problems due to water leakage will occur. Also, with the gasket 24 and the flange 24 overlapped with the end surface of the pipe 27, the nut 25 is engaged with the screw 29 of the pipe 27, but since the straight pipe portion 23 is movable, its workability is a problem. There is also.

The present invention solves the above-mentioned problems, and when connecting a straight pipe portion of a flexible pipe and a pipe, it is possible to easily make the axes of the both parallel. At the same time, the purpose is to obtain a flexible pipe joint with good connection workability.

[0007]

[Means for Solving the Problems]

 The flexible pipe joint of the present invention is a flexible pipe joint in which a nut is attached to the straight pipe portion by engaging with a flange provided on the straight pipe portion at the end of the flexible portion. It has a connection sleeve that is inserted over both the pipe to which this straight pipe section is connected, and the outer diameter of this connection sleeve matches each inner diameter of the straight pipe section and the pipe. It is characterized in that support means is provided for keeping the connection sleeve in the state of being inserted over.

[0008]

[Action]

 In the flexible pipe joint of the present invention, the connecting sleeve is inserted over both the straight pipe portion and the pipe to which the straight pipe portion is connected, and the connecting sleeve pre-connects the straight pipe portion to the pipe. At the same time, the radial movement of the straight pipe portion is regulated by the connecting sleeve so that the axial centers of the pipe and the straight pipe portion are parallel to each other and the parallel axes are maintained in parallel. In this state, the nut attached to the straight pipe portion is engaged with the screw of the pipe and tightened. In addition, the connecting sleeve regulates the movement of the straight pipe section, enabling smooth engagement of the nut with the pipe thread.

A first embodiment of the flexible pipe joint of the present invention will be described with reference to FIGS.

1 and 2, reference numeral 1 denotes a flexible pipe made of stainless steel, which is provided with a straight pipe portion 3 at an end of the flexible portion 2 and a flange 4 at an end edge of the straight pipe portion 3. Is configured. Reference numeral 5 is a connecting nut, and an engaging edge 6 projecting from the inner circumference of the end is engaged with the flange 4 and is inseparably attached to the straight pipe portion 3. 7 is a pipe for equipment or water supply, and a screw 8 is provided on the outer circumference of the end portion. Reference numeral 9 is a connecting sleeve made of metal, and a ring-shaped concave groove 10 as a supporting means is formed on the outer peripheral surface of the intermediate portion in the lengthwise direction, and the outer diameter of the connecting sleeve 9 on one side thereof is the straight pipe portion 3 It is adapted to be inserted into the pipe 7, and the outer diameter of the other side is adapted to be inserted into the pipe 7. Reference numeral 11 denotes a ring-shaped gasket, which is attached to the connecting sleeve 9 with its inner peripheral edge engaged with the groove 10.

The flexible pipe 1 and the pipe 7 are connected by inserting the end portion of the connecting sleeve 9 into the pipe 7, stacking the gasket 11 on the end face of the pipe 7, and connecting the other end of the connecting sleeve 9 to the straight pipe portion. 3 and insert the flange 4 on the gasket 11. In this state, the nut 5 is tightened by engaging the screw 8 of the pipe 7 and the gasket 11 is brought into close contact with the end face of the pipe 7 through the locking edge 6 and the flange 4 to connect the straight pipe portion 3 to the pipe 7. And seal the connection. Further, the inner peripheral surface of the pressurized gasket 11 is pressed against the groove 10 to support and fix the connecting sleeve 9, and the connecting sleeve 9 is prevented from sliding toward the flexible pipe 1. ..

As described above, since the straight pipe portion 3 and the pipe 7 are connected in advance by the connection sleeve 9 inserted over both of them, the free movement of the straight pipe portion 3 is restricted. The respective axial centers of the pipe 7 are in a parallel state regardless of the arrangement state of the straight pipe portion 3 and maintain the state. Therefore, the flange 4 and the end surface of the pipe are kept parallel to each other via the gasket 11. In this state, the nut 5 is engaged with the screw 8 of the pipe 7 and tightened. Therefore, the entire surface of the gasket 11 is evenly pressed through the locking edge 6 of the nut 5 and the flange 4, and the respective contact surfaces are brought into close contact with each other. It is possible to securely seal the seal and eliminate the risk of water leakage. Moreover, since the connecting sleeve 9 restricts the free movement of the straight pipe portion 3, it is possible to smoothly and efficiently perform the work of engaging the nut 5 with the screw 8 and tightening.

The connecting sleeve 9 may be inserted in any order such as inserting the other end into the pipe 7 with the other end inserted into the straight pipe part 3. The gasket 11 is also optional such that the gasket 11 is attached to the connecting sleeve 9 whose end is inserted into the straight pipe portion 3 or the pipe 7 without attaching the gasket 11 to the connecting sleeve 9 in advance. Moreover, since the diameters of the straight pipe portion 3 and the pipe 7 are different, the diameters of both ends of the connection sleeve 9 are different, but these diameters are different from each other. Set according to.

3 to 4 show a second embodiment, in which a support wall 12 as a support means is fixedly projected on the outer periphery of the middle portion of the connection sleeve 9 in the length direction. The ring-shaped gasket 11 is formed in a concave shape in cross section, the support wall 12 is inserted into the groove portion, and the gasket 11 is attached to the support wall 12. The support wall 12 can be fixed to the connection sleeve 9 by any means such as welding, and the connection sleeve 9 and the support wall 12 can be integrally formed of metal or hard synthetic resin. Is. The other structure is the same as that of the first embodiment, and therefore the same reference numerals are given. The connection of the flexible pipe 1 to the pipe 7 is also the same as that in the first embodiment, so the description thereof will be omitted.

In the second embodiment, since the support wall 11 is supported by the flange 4 and the end surface of the pipe 7 via the gasket 11, the connection sleeve 9 can be supported more firmly. It is possible.

FIG. 5 shows a third embodiment. In the third embodiment, the straight pipe portion 3 provided at the end of the flexible pipe 1 is provided with a locking groove 13 projecting outward from the peripheral surface thereof, and is inserted into the straight pipe portion 3 described above. A locking ridge 14 is provided that projects outward from the peripheral surface of the connecting sleeve 9. Then, the end portion of the connection sleeve 9 provided with the locking projection 14 is slightly strongly inserted into the straight pipe portion 3, and the locking projection 14 is locked in the locking recessed groove 13 so that the connection sleeve 9 is locked. The straight pipe part 3 is supported so as not to be separated. The other configurations are the same as those in the first embodiment, and therefore, are denoted by the same reference numerals. The connection sleeve 9 is made of metal or hard synthetic resin.

The flexible pipe 1 is connected to the pipe 7 by inserting the connecting sleeve 9 into the pipe 7 through the straight pipe portion 3 by disposing a gasket 11 on the outer circumference of the connecting sleeve 9. Then, the nut 5 is engaged with and tightened with the screw 8 of the pipe 7, and since the straight pipe portion 3 and the connecting sleeve 9 are integrated, the axial centers of the straight pipe portion 3 and the pipe 7 are integrated. Are easier to parallelize.

In contrast to the third embodiment, it is also possible to provide a concave groove on the outer peripheral surface of the connection sleeve 9 and provide a ridge engaged with the concave groove on the inner peripheral surface of the straight pipe portion 3. Is. It is also possible to fix the connecting sleeve 9 of the straight pipe portion 3 by welding or the like so that the connecting sleeve 9 is supported by the straight pipe portion 3.

[0019]

[Effect of the device]

 As described above, the flexible pipe joint of the present invention is a connecting sleeve inserted over both the straight pipe portion and the pipe when the flexible pipe is connected to the pipe. Because the connection is made, the straight pipe section is always parallel to each other and the free movement of the straight pipe section is regulated regardless of the bending state of the flexible section of the flexible pipe. It is possible to maintain the horizontal state of each axial center of the pipe. Then, in this state, engage the nut with the screw on the pipe and tighten it. Therefore, it is easy to connect the nut to the screw of the pipe, and at the same time, the flange provided on the straight pipe can be tightened while maintaining the parallel state to the end face of the pipe, so it is possible to tighten one-sidedly. It is possible to connect the straight pipe section to the pipe in a state where there is no risk of water leakage by constantly pressurizing the entire circumference of the gasket evenly without causing this.

[Brief description of drawings]

FIG. 1 is a sectional view of a connection state of a first embodiment.

FIG. 2 is an enlarged front view in which a part of the connection sleeve of the first embodiment is sectioned.

FIG. 3 is a cross-sectional view of a connected state of the second embodiment.

FIG. 4 is an enlarged front view in which a part of the connection sleeve of the second embodiment is sectioned.

FIG. 5 is a cross-sectional view of a connected state of the second embodiment.

FIG. 6 is a cross-sectional view of a connected state of a conventional example.

[Explanation of symbols]

3 straight pipe section, 4 flanges, 5 nuts, 7 piping, 9
Connection sleeve, 10 recesses, 11 gaskets.

Claims (1)

[Scope of utility model registration request] 1. A flexible pipe joint in which a nut is attached to the straight pipe portion by engaging with a flange provided on the straight pipe portion at the end of the flexible portion, and the straight pipe portion is connected to the straight pipe portion. A connecting sleeve is provided that is inserted over both the pipe and the pipe, and the outside diameter of this connecting sleeve matches the inside diameter of the straight pipe section and the pipe. A flexible pipe joint, characterized in that it is provided with supporting means for keeping it in the sleeve.