JP3501481B2 - Pipe fittings - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe joint having a guide passage for guiding a fluid flowing out from a through hole provided in a lower peripheral wall of a fluid transport pipe upward along an outer peripheral surface of the fluid transport pipe.
Regarding the hands .

[0002]

A pipe fitting is used, for example, to connect a fire hydrant or an air valve to a water pipe in a branching manner. The tap water flowing out from a through hole provided in a lower peripheral wall of the water pipe is used as a fire hydrant or an air valve. By using a fire hydrant or an air valve that is branched and connected, etc., the sediment, mud, etc. accumulated at the inner bottom of the water pipe due to plumbing work, etc. will be discharged together with the tap water flowing out from the through hole. In addition, since the guide flow path is provided along the outer peripheral surface of the water pipe, the flow path wall that constitutes the guide flow path is integrally provided with the water pipe, and the guide flow path is advantageously arranged in terms of strength. However, conventionally, as shown in FIG. 7, the fluid flowing out from the through hole 02 provided in the lower peripheral wall of the fluid transport pipe 01 is supplied to the fluid transport pipe 01 itself used for a water pipe or the like. A guide flow path forming portion 0 that guides to the upper part in the circumferential direction along the
A pipe joint 05 in which 3 and a branch connection portion 04 are integrally cast is known. Such a pipe joint 05 is connected in the middle of a piping path, and a fire hydrant, an air valve, or the like is connected to the branch connection portion 04 side. It is branched and connected (for example, see Japanese Utility Model Laid-Open No. 5-19786).

[0003]

The above-mentioned conventional pipe joint is
Since the guide channel and the branch connecting portion are integrally formed in the fluid transport pipe itself, there is a drawback that the manufacturing cost becomes high. or,
If you want to newly install such a pipe joint in the existing pipe route and branch connect the fire hydrant or air valve, it is necessary to partially remove the existing pipe and attach the pipe joint to the removed part. The branch connection work has a drawback that it requires a lot of labor and cost, and at the time of such branch connection work, it is necessary to stop the flow of fluid in the existing pipe or install the pipe joint with the fluid removed from the existing pipe. Therefore, there is also a drawback that the user is forced to inconvenience such as running out of water. The present invention has been made in view of the above circumstances, and its purpose
Is, it is possible to achieve the simplification of the joint itself and the manufacturing cost reduction, even when the branch connection hydrants and air valves, etc. through the pipe joint in the existing pipe route, Ya sediment collected in the tube bottom while increasing the discharge performance for mud, a branch connecting work efficiently easily and in that it provides a pipe joint that can be advantageously implemented in construction cost surface.

[0004]

In order to achieve the above object, the pipe joint according to the present invention is characterized in that the fluid flowing out from the through hole formed in the lower peripheral wall of the fluid transport pipe is provided on the outer peripheral surface of the fluid transport pipe. A pipe joint having a guide flow path for guiding upward along the flow path, wherein a flow path forming member forming a guide flow path with the outer peripheral surface of the fluid transport pipe is provided on the outer peripheral surface of the fluid transport pipe. The split forming member on the upper side is in communication with the guide channel and is concentric with the upper peripheral wall and the lower peripheral wall of the fluid transport pipe. The point is that a branch connecting portion having a size through which a cutter of a punching device for forming a through hole can pass is provided, and a blocking member for closing the through hole formed in the upper peripheral wall of the fluid transport pipe is provided. The closing member may be configured to cover an inner peripheral surface of a through hole formed in an upper peripheral wall of the fluid transport pipe .

[0005]

By fixing a plurality of divided forming members forming the flow passage forming member to the outer peripheral surface of the fluid transport pipe in a state of being sandwiched from the radial direction, the inner surface of the flow passage forming member and the outer peripheral surface of the fluid transport pipe are fixed. A guide flow path for guiding the fluid flowing out from the through hole formed in the lower peripheral wall of the fluid transport pipe to the branch connection portion provided in the upper split forming member can be formed between the two. Moreover, by utilizing the branch connecting portion provided on the upper split forming member, the cutter of the punching device fed from this branch connecting portion to the fluid transport pipe side forms through holes in the upper peripheral wall and the lower peripheral wall in a concentric state. Since it can be formed, for example, as compared with the case where the lower split forming member is provided with a connecting portion for punching work having a size through which the cutter of the punching device can pass, the flow passage forming member can be simplified and downsized. Not only can it be realized, but also it is not necessary to secure a large space for mounting the punching device below the fluid transport pipe, so that the excavation volume of the work pit can be significantly reduced. Furthermore, since the through hole formed in the upper peripheral wall of the fluid transport pipe can be closed with the closing member after the punching step,
It is possible to improve the performance of discharging the earth and sand and mud accumulated at the bottom of the pipe. Further, when the closing member is configured to cover the inner peripheral surface of the through hole formed in the upper peripheral wall of the fluid transport pipe, it is possible to suppress corrosion of the inner peripheral surface of the through hole.
it can.

[0006]

According to the pipe joint of the first aspect, the joint itself can be simplified and the manufacturing cost can be reduced, and a fire hydrant, an air valve, etc. can be branched through the pipe joint to an existing pipe path. Even when connecting, the work of removing a part of the existing pipe is unnecessary, the excavation volume of the work pit can be significantly reduced, and the pipe joint assembly work can be performed easily. By synergizing with what can be done, branch connection work can be performed efficiently and easily, and also advantageous in terms of construction cost, while enhancing the discharge performance to the soil and mud accumulated in the bottom of the pipe. The pipe joint according to claim 2,
Through the through hole for work formed on the upper peripheral wall of the fluid transport pipe, while forming a through hole communicating with the guide channel on the lower peripheral wall of the fluid transport pipe, it is possible to suppress corrosion of the upper through hole. it can.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 to 3 show, in a through hole 1 provided in a lower peripheral wall of an existing water pipe A, an arc-shaped guide passage 2 which guides the existing water pipe A along its outer peripheral surface to an upper portion in the circumferential direction. The pipe joint B made of ductile cast iron that is branched and connected via the flow path forming member 3 that can be fixed to the outer peripheral surface of the existing water pipe A is provided, and the branch connection for branching and connecting the fire hydrant and the air valve is shown. The section 4 is provided on the guide channel end side of the channel forming member 3, and as shown in FIGS. 2 and 3, by fixing the channel forming member 3 to the outer peripheral surface of the existing water pipe A, The guide flow path 2 is formed between the inner surface of the forming member 3 and the outer peripheral surface of the existing water pipe A, so that tap water flowing out from the through hole 1 provided in the existing water pipe A is along the outer peripheral surface of the existing water pipe A. Guide to the upper part in the circumferential direction and lead out to a fire hydrant or an air valve that is branched and connected to the branch connection part 4 side Cormorants are constituted. The flow path forming member 3 is formed in a tubular shape surrounding the outer peripheral surface of the existing water pipe A, and the two upper and lower split forming members 3a and 3b are fixed so that the outer peripheral surface of the existing water pipe A can be fixed while being sandwiched from the radial direction. In addition, the flow path wall 12 forming the guide flow path 2 is bulged radially outward along the circumferential direction of the outer peripheral surface of the existing water pipe A. In the division forming members 3a, 3b, a mounting groove 6 for a rubber packing material 5 for preventing tap water from leaking between the flow path forming member 3 and the outer peripheral surface of the existing water pipe A,
The flanges 7 and 8 that connect the two split forming members 3a and 3b, and the mounting groove 10 for the rubber packing material 9 that prevents tap water from leaking from the joint surface between the flanges 7 are provided, and The flow path forming member 3 and the existing water pipe A are secured by ensuring a large contact area between the forming member 3 and the outer peripheral surface of the existing water pipe A.
Existing water pipe A to effectively prevent relative movement with
The half-split cylindrical member 11 pressed against the outer peripheral surface is integrally formed, and the upper split forming member 3a includes a branch connecting pipe portion 4a and a connecting flange 4b, and the existing water pipe A The upper and lower peripheral walls are integrally formed with a branch connecting portion 4 having a size through which the cutter E of the punching device D for forming the through holes 13 and 1 in the concentric state can pass.

The pipe joint B is attached to an existing water pipe A buried in the ground in a state of uninterrupted water that does not stop the flow of tap water, and a fire hydrant or air is attached to the branch connection portion 4 side of the pipe joint B. The method of branching and connecting valves etc. is shown in Figs.
A description will be given with reference to FIGS. An existing water pipe A was constructed by excavating a pit at a branch connection point such as a fire hydrant or air valve.
After exposing the outer peripheral surface of the existing water pipe A, the split forming members 3a and 3b having the packing materials 5 and 9 are set on the outer peripheral surface of the existing water pipe A, and the packing materials 5 and 9 are set. By connecting them together, both split forming members 3a, 3
By connecting the flanges 7 and 8 of b with bolts and nuts, the flow path forming member 3 is watertightly fixed to the outer peripheral surface of the existing water pipe A as shown in FIG. Branch connection between the inner surface of the forming member 3 and the outer peripheral surface of the existing water pipe A, in which tap water flowing out from the through hole 1 formed in the lower peripheral wall of the existing water pipe A is provided in the upper split forming member 3a. Branch connection pipe part 4a of the branch connection part 4 for guiding the flow to the part 4.
The guide flow path 2 communicating with the. Next, the branch connection part 4
The sluice valve C is fixed to the sluice in a watertight manner, and the first closed case F in which the cylindrical cutter E of the perforator D is set inside is fixed to the sluice valve C in a watertight manner, as shown in FIG. As shown, the inside of the guide passage 2 is kept watertight. Next, the cutter E of the perforator D is fed into the branch connecting pipe portion 4a of the branch connecting portion 4 through the sluice valve C to form the working through hole 13 in the upper peripheral wall of the existing water pipe A, and then the cutter E is further provided. 4 from the work through hole 13 into the existing water pipe A, and further fed to the lower peripheral wall side of the existing water pipe A as shown in FIG. The through hole 1 is formed in the lower peripheral wall of the existing water pipe A facing the above. next,
As shown in FIG. 5D, the cutter E, which holds the cutting pieces of the working through hole 13 and the through hole 1 inside, is collected in the first closed case F, and the sluice valve C is closed to make the first closed case. The case F is removed from the sluice valve C, and as shown in FIG. 5E, the second sealing case G in which the closing member 14 for closing the working through hole 13 is set inside the sluice valve C. And fix it watertight.

An operating rod 15 having a handle 16 which can be pushed and pulled and rotated from the outside of the casing is supported by the second closed casing G, and the tip of the operating rod 15 is supported as shown in FIG. The male screw portion 17 provided in the portion is screwed into the female screw hole 18 provided in the closing member 14, and the closing member 14 is set inside the case. The closing member 1
4 is configured by covering the metal plate-shaped core material 19 with the thick-walled rubber lining material 20 to form a disk shape in a plan view and an arc shape along the shape of the existing water pipe A in a side view. The upper and lower flanges 21 and 22 that sandwich the peripheral edge of the work through hole 13 from the thickness direction along the radial end surface are integrally formed in an annular shape in a state of being elastically deformable in the thickness direction, and A taper surface 23 is formed on the lower surface side of the side flange 22 to facilitate the fitting of the closing member 14 into the working through hole 13.

Then, the closing member 14 is operated by operating the operating rod 15.
When the tapered surface 23 is pressed against the upper edge of the work through hole 13 and pushed in, the lower collar 22 is elastically deformed and the closing member 14 is inserted into the work through hole 13 as shown in FIG. 6B. 6 (c)
As shown in FIG. 4, the upper flange 21 is elastically deformed by contact with the upper edge of the work through-hole 13, and the lower flange 22 is pushed in until the peripheral edge of the lower flange 22 comes out of the work through-hole 13 and then pushed by the operating rod 15. When the operation is cancelled, FIG.
As shown in (d), the peripheral edge of the work through-hole 13 is sandwiched between the upper and lower flanges 21 and 22, so that the work through-hole 1
3 is closed. In other words, the through hole 1 formed in the upper peripheral wall of the fluid transport pipe (A) by the closing member 14
The inner peripheral surface of 3 is covered. Next, the operating rod 15 is rotated to be removed from the female screw hole 18 of the closing member 14 and collected in the second closed case G, and the sluice valve C is closed to remove the second closed case G as shown in FIG. After that, a branch pipe or the like is connected to the sluice valve C as necessary, and a fire hydrant, an air valve, or the like is diverged to the shunt valve 4 via the sluice valve C. The female screw hole 18 after the operation rod 15 is removed functions as an air vent hole after the fire hydrant and the air valve are branched and connected.

[Other Embodiments] 1. The fluid transport pipe to which the pipe fitting according to the present invention is attached,
It is not limited to a water pipe, but may be a sewer pipe, a gas pipe, or the like, and the application of the fluid transport pipe to be attached is not particularly limited. 2. The flow path forming member of the pipe joint according to the present invention is fixed to the outer peripheral surface of the fluid transport pipe by welding, fixed by bolts standing on the outer peripheral surface of the fluid transport pipe, and U-bolt mounted so as to hold the outer peripheral surface of the fluid transport pipe. It may be fixed or adhesively fixed, and the fixing means is not limited. 3. The material of the pipe joint according to the present invention is not limited to metal and may be synthetic resin, hard rubber or the like. 4. The pipe joint according to the present invention is provided with a branch connection portion including a sluice valve or the like capable of holding the guide flow passage formed between the flow passage forming member and the outer peripheral surface of the existing fluid transport pipe in a liquid-tight or air-tight manner. It may be one. 5. The pipe joint mounting method according to the present invention may be one in which a perforation device for perforating by a manual operation force is inserted into the guide passage to form the through hole. 6. In the example, a through hole for construction for providing a through hole in the lower peripheral wall of the fluid transport pipe is formed with a large-diameter cutter,
After forming the construction through-hole, even if this large-diameter cutter is replaced with a small-diameter cutter, a smaller-diameter through-hole is provided on the lower peripheral wall of the fluid transport pipe with this small-diameter cutter. good. 7. In the embodiment, even if the construction through hole formed to provide the through hole in the lower peripheral wall of the fluid transport pipe is left as it is,
It may be performed by closing with a closing member (plug) that does not have a small hole that functions as an air vent hole.

It should be noted that although reference numerals are given in the claims for convenience of comparison with the drawings, the present invention is not limited to the configurations of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a pipe joint.

FIG. 2 is a sectional view of a pipe joint.

FIG. 3 is a side view of the pipe joint.

FIG. 4 is a schematic view showing a pipe joint mounting method.

FIG. 5 is a schematic diagram showing a fitting method for a pipe joint.

FIG. 6 is a sectional view of an essential part showing a fitting method for a pipe joint.

FIG. 7 is a perspective view showing a conventional pipe joint.

[Explanation of symbols]

1 through hole 2 guide channels 3 Flow path forming member 4 branch connection A fluid transport pipe B fitting D punching device

Claims (2)

(57) [Claims] 1. A guide channel (2) for guiding a fluid flowing out from a through hole (1) formed in a lower peripheral wall of a fluid transport pipe (A) upward along an outer peripheral surface of the fluid transport pipe (A). )
A pipe joint provided with a guide flow path (2) between the fluid transport pipe (A) and the outer peripheral surface thereof.
The flow path forming member (3) for forming the above is composed of a plurality of division forming members (3a), (3b) fixed in a state of being sandwiched radially from the outer peripheral surface of the fluid transport pipe (A), and the upper side The split forming member (3a) is communicated with the guide channel (2),
Moreover, the size of the cutter (E) of the punching device (D) for forming the through holes (13) and (1) in the concentric state on the upper peripheral wall and the lower peripheral wall of the fluid transport pipe (A) can be passed. A blocking member (1) which is provided with the branch connection part (4) and closes the through hole (13) formed in the upper peripheral wall of the fluid transport pipe (A).
4) A pipe joint provided with. 2. The pipe joint according to claim 1, wherein the closing member (14) is configured to cover an inner peripheral surface of a through hole (13) formed in an upper peripheral wall of the fluid transport pipe (A). .