JPH10299960A - Pipe coupling for branching - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out the branching work of a pipe with a shallow burying depth, by reducing the height of a pipe coupling installed to the pipe. SOLUTION: An installing part 11 to a pipe 100, a communication passage 15 extending vertically when the installing part 11 is installed to the pipe 100, and a housing 10 to form a lateral branch passage 23 extending from the communication passage 15, are provided. A plug 3 in order to block the front end opening of the communication passage 15 is provided. To the housing 10, a branch port 24 positioning at the position on the way of the branch passage 23 is provided. A branch pipe can be connected to the branch port 24. A valve 4 to open and close the branch port 24 is housed in the branch passage 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a branch pipe joint.

[0002]

2. Description of the Related Art FIG. 5 shows a state of use of a conventional branch pipe joint. The branch pipe joint includes a mounting member 71 that is divided into a lower saddle 72 and an upper saddle 73 and is mounted on the pipe 100, and a first member 7 that is screwed to the upper saddle 73.
5, a housing 74 comprising a second member 76 screwed to the first member 75, a plug 77, and a valve 79 housed in a communication passage 78 formed by the first member 75 and having an open end. And so on.

In this pipe joint, the second member 76 of the housing 74 forms a branched passage 81 extending laterally from an intermediate position of a communication passage 78 of the first member 75. The valve 79 has a male screw 83 and a tool engagement hole 84 which can be screwed to a female screw 82 formed on the inner peripheral surface of the first member 75.

At the time of branching, the valve 79 is rotated in the forward or reverse direction using a tool (not shown) inserted into the communication passage 78 from which the plug 77 has been removed. Then, at a stage after the branch port 120 is pierced in the pipe 100, the valve 79 is rotated in the forward direction so that the valve seat 85 provided on the valve 79 is stepped on the peripheral surface of the communication hole 78. When the valve (79) comes into close contact with the formed seating surface (86), the valve (79) branches the passage (8) of the fluid (eg, gas) entering the communication passage (78) from the conduit (130) through the opening (120).
1 is shut off. Conversely, when the valve 79 is rotated in the reverse direction and the valve 79 is retracted upward (as shown), the valve seat 85 separates from the seat surface 86 and the communication passage 78 and the branch passage 81 are separated. Because it is communicated,
The fluid that has entered the communication passage 78 from the pipe 130 via the opening 120 further flows into the branch passage 81.

In the pipe joint shown in FIG. 5, a branch pipe (not shown) is connected to the second member 76 of the housing 74. Further, the plug 77 is attached to the first member 75 after retreating the valve 79 upward as shown in the figure, and closes the opening at the end of the communication passage 78. In the conventional pipe joint described with reference to FIG. 5, as can be seen from the above description, the moving direction of the valve 79 housed in the communication passage 78 of the first member 75 is the vertical direction. Therefore, the communication passage 78 is required to have a length enough to move the valve 79 in the vertical direction, and after performing the branching operation, the plug 77 attached to the open end of the communication passage 78 at the tip end is shown. As shown in the figure, the first member 75 projects further upward from the upper end thereof.
The height H2 from the top surface of the plug 77 to the top surface of the plug 77 becomes relatively high.

For this reason, like a gas buried pipe, the pipe 10
0 or a branch pipe joint connected to the pipe, or if it is required that the branch pipe be buried underground, the pipe 1
The burial depth of 00, that is, the depth D2 from the ground G to the top surface of the pipe 100 must be deepened in advance in consideration of the height H2 described above.

[0007]

However, the ground G
If the pipe 100 is constructed so that the depth D2 from the pipe to the top surface of the pipe 100 becomes deep, there is a problem that a large-scale construction is required and the construction cost is high.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a branch pipe joint having a height lower than that of the above-described conventional one. Further, the present invention meets the demand that, even when branching work is performed on a pipe having a smaller burial depth than the conventional case, a branch pipe joint or a branch pipe must be buried in the ground. It is an object of the present invention to provide a branch pipe joint that can be obtained.

[0009]

According to a first aspect of the present invention, there is provided a pipe joint for branching, which is used for drilling a pipe wall of the pipe when the mounting section is mounted on the pipe. An open-ended communication passage through which a drilling tool can be inserted and which is communicated with the pipe line of the pipe through an opening opened by drilling the pipe wall, and a branched passage extending from an intermediate portion of the communication path. And a plug for closing a distal end opening of the communication passage, wherein a branch pipe line is connected to the housing at a position midway along the branch passage. And a valve that is inserted into the branch passage and closes the branch port.

In the present invention, a valve for interrupting the flow of the fluid or flowing the fluid during the branching operation is inserted into the branch passage, and the branch passage is provided with a branch pipe. Since the branch port to which the passage is connected is provided, it is necessary to secure a sufficient length to allow the valve to be moved in the vertical direction in the open-ended communication passage that communicates with the internal passage of the pipe, as in the related art. Disappears. Therefore, as in the invention according to claim 2, when the mounting portion is attached to the pipe, the communication passage extends vertically, the branch passage extends laterally, and the branch port extends laterally. When the communication passage, the branch passage and the branch opening are formed in the housing, the height of the branch pipe joint attached to the pipe is lower than that of the related art, so that the burial depth of the pipe can be reduced accordingly. .

Further, since the housing is provided with the mounting portion to be mounted on the pipe, the number of parts is reduced as compared with the conventional case where the mounting member and the housing are separately provided, and the assembling is easy accordingly. And the production cost is low.

According to a third aspect of the invention, there is provided a branch pipe joint according to the first or second aspect, wherein the valve inserted into the branch passage connects the branch port in the branch passage. It is slidable hermetically with respect to the peripheral surface of the branch passage between a forward position for closing and a retreat position for opening the branch port, and the retreat position is provided at a terminal side of the branch passage from the forward position. It is.

In the present invention, when the valve is advanced to the advanced position, the fluid that has flowed into the branch passage through the opening of the pipe and the communicating passage is blocked by the valve and does not flow out of the branch port. Further, since the valve can be hermetically slid on the peripheral surface of the branch passage from the forward position to the retracted position where the branch port is opened, the valve is slid from the advanced position to the retracted position and from the retracted position. In each case when the position is reached, the branch passage is blocked at the location where the valve is located. Therefore, even if the end of the branch passage is open, the fluid does not flow out from the end.

According to a fourth aspect of the present invention, there is provided the branch pipe joint according to the second or third aspect, wherein the valve is located at the forward position on the peripheral surface of the branch passage. A seating surface corresponding to a valve seat provided at a front end of the valve is formed in a stepped shape.
A protruding member extending rearward of the valve is provided, and the housing is provided with a cap mounting portion for closing an opening provided at an end of the branch passage,
The cap body is provided with a pressing portion that presses the rear end of the protruding member to press the valve seat of the valve against the seat surface when the cap body is mounted on the mounting portion.

In the present invention, the cap body mounted on the mounting portion of the housing not only serves to prevent soil and water from entering the housing, but also presses the valve via the protruding member to remove the valve. Helps to hold in the advanced position. Therefore, the fluid flows out from the opening formed in the pipe wall of the pipe, and even if the fluid pressure at that time is applied to the valve, the valve may not retract and the branch port may be opened, and this may occur unexpectedly. This helps to prevent a situation where the mouth is opened and fluid flows into the branch passage.

According to a fifth aspect of the invention, there is provided a branch pipe joint according to any one of the second, third, and fourth aspects, wherein the branch pipe is hooked to the housing at a rear end of the valve. A hole is provided for inserting a convex member for preventing the valve from moving backward from the retracted position.

In the present invention, if the convex member is inserted into the hole of the housing, when the valve is to be moved further backward than the retracted position, the convex member is engaged with the rear end of the valve. The rearward movement of the valve is prevented. This prevents the valve from dropping out of the branch passage and accidental withdrawal.

According to a sixth aspect of the present invention, there is provided a branch pipe joint according to the fourth aspect, wherein a neck portion for breaking the projecting member and separating it from the valve is provided at the base of the projecting member. And the above housing,
There is provided a hole for inserting a convex member which is hung on the rear end of the valve and prevents the valve from moving backward from the retracted position.

In the present invention, the same operation as that of the fifth aspect is provided. Further, when the protruding member provided on the valve becomes unnecessary, for example, when the final stage of the branching operation of retreating the valve to the retreat position and opening the branch port is completed, the protruding member is confined at the base thereof. And can be disconnected from the valve.
Therefore, despite the fact that the opening at the end of the branch passage is closed by the cap body mounted on the mounting portion of the housing, the projecting member is accommodated behind the valve when the valve is located at the retracted position. There is no need to reserve space for Thus, it is possible to suppress the length of the branch passage from becoming long.

According to a seventh aspect of the invention, there is provided a branch pipe joint according to any one of the first, second, third, fourth, fifth and sixth aspects. Are divided into a first member forming the mounting portion and the communication passage, and a second member forming the branch passage and the branch port, and the first member has a mounting hole for the second member. The second member is provided with a mounting cylinder portion that is mounted in the mounting hole portion.

According to the present invention, since the housing is divided into the first member forming the mounting portion and the communication passage, and the second member forming the branch passage and the branch port, the communication passage intersects with each other. And a housing having a complicated shape having a branch passage can be easily assembled by the first member and the second member.

[0022]

FIG. 1 is a partially cutaway front view showing a use state of a branch pipe joint A according to the present invention, and FIG.
FIG. 3 is a partially broken plan view of a main part of the pipe joint A, and FIG. 4 is a partial cross-sectional view of another main part of the pipe joint A.

In this branch pipe joint A, the housing 10 is divided into a first member 1 and a second member 2.

The first member 1 of the housing 10 has a mounting portion 11 formed by a lower saddle portion 11a and an upper saddle portion 11b. The mounting portion 11 is formed by sandwiching the tube 100 vertically with a lower saddle portion 11a and an upper saddle portion 11b, and tightening a plurality of portions of the saddle portions 11a and 11b with bolts 12.
It is attached to. Further, the first member 1 includes an upper saddle portion 1.
1b, and a mounting hole portion 14 protruding laterally from the rising cylindrical portion 13 is integrally provided, and the mounting hole portion 14 is used for mounting the second member 2. Can be

The rising cylindrical portion 13 of the first member 1 is
Has an inner diameter capable of inserting a drilling tool used for drilling a pipe wall, and an opening formed by drilling the pipe wall of the pipe 100 using a drilling tool inserted into the rising cylindrical portion 13 from above ( Tube 100 (not shown in FIG. 1)
Vertically extending communication passage 15 which is communicated with the pipeline 130
Is formed. A female screw 16 is formed in the rising cylindrical portion 13, and when the male screw 31 of the plug 3 is screwed into the female screw 16, the plug 3 closes the open end 17 of the communication path 15. .

The second member 2 has a mounting cylinder 21 inserted into the mounting hole 14 of the first member 1 and mounted. The second member 2 is made of polyethylene, and the mounting cylinder 21 is reinforced by a metal stiffener 22. The fitting portion between the mounting cylinder 21 and the mounting hole 14 is hermetically sealed by sealing materials 18 and 19 interposed therebetween. The mounting cylinder 21 is prevented from slipping into the uneven surface 14a on the mounting hole 14 side by the expanding action of the stiffener 22.

The second member 2 having the mounting cylinder 21 is a first member 2
A branch passage 23 extending laterally from an intermediate portion of the communication passage 15 of the member 1 is formed. The second member 2
A connection port 25 to which a branch pipe (not shown) is connected extends at a right angle, and is connected to the second member 2 at an intermediate position of the branch passage 23 so as to be connected to the connection port 25. A horizontal branch port 24 is provided for communication. Although the branch passage 23 and the branch opening 24 are both horizontal, the horizontal opening angle in each of the directions is 90 degrees (see FIG. 2). At the front of the branch port 24, the peripheral surface 26 of the branch passage 23 is formed.
A seating surface 27 is formed in a stepped shape. Further, a male screw 28 is provided at the rear end of the second member 2 forming the branch passage 23. When the female screw 51 of the cap body 5 is screwed into the male screw 28, the cap body 5 is attached to the rear end of the second member 2 so as to close the opening 29 provided at the end of the branch passage 23.

A valve 4 made of synthetic resin is inserted into the branch passage 23 of the second member 2. This valve 4
An annular front seal member 41 is provided at the front end corner portion, and an annular rear seal member 42 is provided at the rear outer peripheral portion. The front end surface of the front seal member 41 is a seat surface 43. Also, the sealing material 4
The front seal member 41 and the rear seal member 42 can be hermetically slid on the peripheral surface 26 of the branch passage 23 during the movement. Further, the valve 4 is integrally formed with a rod-shaped projecting member 44 of a predetermined length extending rearward thereof. The protruding member 44 has an annular groove 45 at the base thereof, and the annular groove 45.
Are formed as vulnerable constrictions 46,
When the protruding member 44 is bent at the constricted portion 46, the protruding member 44 is broken there and easily separated from the valve 4.

The position of the valve 4 where the seat surface 43 of the front sealing member 41 of the valve 4 is pressed against the seat surface 27 provided in the branch passage 23, ie, the position of the valve 4 shown in FIGS. When the valve 4 is located at the forward position, the branch port 24 is closed by the valve 4. Further, at this time, when the cap body 5 is screwed to the rear end portion of the second member 2 as shown in FIG. 1 and FIG. 2, the pressing portion 52 provided on the cap body 5 causes the protruding member 44 to move. The front sealing member 41 is pressed forward by the pressing force, and the seat surface 43 of the front sealing member 41 is strongly pressed against the valve seat 27, so that the airtightness at that location is enhanced. The valve 4 is movable within the branch passage 23 between the forward position and the backward position. The retracted position of the valve 4 is provided at a position closer to the end of the branch passage 23 than the advance position described with reference to FIGS. 1 and 2, that is, at a position between the branch port 24 and the end of the branch passage 23. Therefore, when the valve 4 retreats from its advanced position and moves to the retracted position as shown in FIG. 3, the seat surface 43 of the front sealing material 41 separates from the valve seat 27, the branch port 24 opens, and the branch passage 2 opens.
3 is an internal passage 25a of the connection port 25 through the branch port 24
Is communicated to.

As shown in FIG. 4, a hole 61 made of a screw hole is provided at the rear end of the second member 2.
, A convex member 62 made of a set screw is screwed. When the protruding member 62 is rotated in the direction of screwing into the hole 61, the tip of the protruding member 62 is protruded to the end of the branch passage 23, and conversely, when the protruding member 62 is rotated in the direction of being pulled out from the hole 61,
The tip of the convex member 62 retreats outside the terminal end of the branch passage 23. When the convex member 62 projects to the end of the branch passage 23, the convex member 62
To prevent the valve 4 from moving backward from the retracted position. In addition, the convex member 62 includes
A pin can be used instead of the set screw, in which case the hole 61 does not need to be a screw hole.

In the branch pipe joint A described above, the housing 10 composed of the first member 1 and the second member 2 is attached to the pipe 100 by attaching the mounting portion 11 to the pipe 100 as shown in FIGS. Attached to 100. After the housing 10 is attached in this manner, the first
An opening is opened by inserting a drilling tool from above into the communication path 15 of the rising cylindrical portion 13 of the member 1, and an opening is opened.
The drilling tool is removed from the communication path 15, and the plug 3 that closes the open end 17 of the communication path 15 is attached to the rising cylindrical section 13.

During the branching operation, the fluid (for example, gas) flowing out of the pipe 130 through the opening of the pipe wall does not flow out of the branch port 24 through the communication passage 15 or the branch passage 23 so as not to occur. When it is required to keep the valve 4 in the forward position as shown in FIGS. 1 and 2, the branch port 24 may be closed. Even if the pressure of the fluid flowing into the branch passage 23 is applied to the valve 4 when the branch port 24 is closed in this manner, the valve 4 is connected to the cap member 5 mounted on the second member 2 via the projecting member 44. , The valve 4 does not retract and the branch port 24 opens.

When diverting the fluid flowing through the conduit 130 through a branch pipe (not shown) connected to the connection port 25, the valve 4 is moved to the retracted position and the branch port 24 is opened. In this case, after removing the cap body 5 from the second member 2, the protruding member 44 is pulled out to move the valve 4 from the advanced position to the retracted position, and then the protruding member 44 is separated from the valve 4 at the constricted portion 46. I just need. During and after the valve 4 is moved from the advanced position to the retracted position, the front seal material 41 and the rear seal material 42 are in close contact with the peripheral surface 26 of the branch passage 23. Therefore, a situation in which the fluid leaks from the end of the branch passage 23 does not occur. If the protruding member 62 is protruded into the branch passage 23 to restrict the retreat limit of the valve 4 as shown in FIG. 4, the valve 4 may be erroneously pulled out from the end of the branch passage 23 when the protruding member 44 is pulled out. There is no danger of it.

In the above-described branch pipe joint A, the valve 4 for cutting off the flow of the fluid or flowing the fluid during the branching operation is provided with a lateral branch extending from an intermediate portion of the vertical communication passage 15. A branch port 24 is inserted into the passage 23, and the branch passage 23 is provided with a branch port 24 to which a branch pipe line is connected. Therefore, unlike the conventional branch pipe joint described with reference to FIG. 5, there is no need to secure a length that allows the valve 79 to move in the vertical communication passage 78 in the vertical direction. Therefore, as shown in FIG. 1, the height H1 of the branch pipe joint A attached to the pipe 100 is lower than that of the conventional pipe joint H2, and the burial depth D1 of the pipe is reduced accordingly.
Also shallow.

In the pipe joint A for branching, the cap body 5 mounted on the mounting portion of the housing 10 (corresponding to the male screw 28 of the second member 2) and the rising cylindrical portion 13 of the first member 1 are mounted. Plug 3 is connected to the pipe joint A for branching.
Helps prevent soil and water from entering the housing 10 after being backfilled in the ground.

In this embodiment, when the projecting member 44 provided on the valve 4 becomes unnecessary, for example, when the final stage of the branching operation of retreating the valve 4 to the retracted position and opening the branch port 24 is completed, Since the protruding member 44 is separated from the valve 4 by folding it at the constricted portion 46 at the base thereof, the opening 29 at the end of the branched passage 23 is formed.
Is closed by the cap body 5,
There is an advantage that the length of the branch passage 23 can be reduced.

[0037]

According to the present invention, when connecting a branch pipe to a pipe buried underground, even if the burial depth of the pipe is smaller than in the conventional case, the branch pipe joint or the branch pipe is grounded. Work that can be buried in it becomes possible.

[Brief description of the drawings]

FIG. 1 is a partially broken front view showing a use state of a branch pipe joint according to the present invention.

FIG. 2 is a partially broken plan view showing a use state of the pipe joint.

FIG. 3 is a partially broken plan view of a main part of the pipe joint.

FIG. 4 is a partial cross-sectional view of another main part of the pipe joint.

FIG. 5 is a cutaway front view showing a usage state of a conventional branch pipe joint.

[Explanation of symbols]

 A Branch pipe joint 1 First member 2 Second member 3 Plug 4 Valve 5 Cap body 10 Housing 11 Mounting portion 14 Mounting hole 15 Communication passage 21 Mounting cylinder 23 Branching passage 24 Branch opening 26 Peripheral surface of branching passage 27 Seat Surface 28 Male screw (mounting portion) 29 Opening at the end of branch passage 43 Valve seat 44 Projecting member 46 Neck portion 52 Pressing portion 61 Hole portion 62 Convex member 100 Tube 130 Pipe line

Claims (7)

[Claims] 1. A mounting part to be mounted on a pipe, wherein the mounting part is opened by being able to insert a drilling tool used for drilling a pipe wall of the pipe when the mounting part is mounted on the pipe, and by piercing the pipe wall. A communication passage having an open end communicated with the conduit of the pipe through the opening, a housing forming a branched passage extending from an intermediate portion of the communication passage, and a housing for closing the open end of the communication passage. A branch pipe joint including a plug, wherein the housing is provided with a branch port located at an intermediate position of the branch path and connected to a branch pipe path, and is inserted into the branch path. A branch pipe joint comprising a valve for closing the branch port. 2. When the mounting portion is mounted on the pipe,
2. The housing according to claim 1, wherein the communication path, the branch path, and the branch port are formed in the housing such that the communication path extends in a vertical direction, the branch path extends in a horizontal direction, and the branch port is in a horizontal direction. Branch pipe fitting. 3. The valve inserted in the branch passage is hermetically sealed to a peripheral surface of the branch passage in the branch passage between an advanced position for closing the branch port and a retracted position for opening the branch port. The branch pipe joint according to claim 1, wherein the pipe joint is slidable, and the retracted position is provided closer to an end of the branch passage than the advanced position. 4. A seating surface corresponding to a valve seat provided at a front end of the valve when the valve is located at the advanced position, is formed in a stepped shape on the peripheral surface of the branch passage. The valve is provided with a protruding member extending rearward of the valve, and the housing is provided with a cap mounting portion for closing an opening provided at the end of the branch passage. 4. The pressing part according to claim 2 or 3, further comprising a pressing part for pressing a rear end of the protruding member to press the valve seat of the valve against the seat surface when the cap body is mounted on the mounting part. Branch pipe fitting. 5. The housing is provided with a hole for inserting a convex member which is hung on a rear end of the valve and prevents the valve from moving backward from the retracted position. The branch pipe joint according to any one of claims 2, 3, and 4. 6. A protruding member is provided at a base thereof with a constricted portion for breaking the protruding member and separating the protruding member from the valve. The branch pipe joint according to claim 4, further comprising a hole for inserting a convex member that prevents the member from moving backward from the retracted position. 7. The housing is divided into a first member forming the mounting portion and the communication passage, and a second member forming the branch passage and the branch port. A mounting hole portion for the second member is provided, and
The pipe joint for branching according to any one of claims 1, 2, 3, 4, 5, and 6, wherein the member is provided with a mounting cylinder portion that is mounted in the mounting hole. .