JPH0658159B2 - Uninterrupted water branching construction method and equipment for water pipes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an uninterrupted water state in an existing water pipe (a water flow state without stopping the flow of running water in an existing pipe line by a pre-established water control valve). The construction method of so-called uninterrupted water branch construction for newly installing a branch pipe and the construction device applied to the construction method.

Here, uninterrupted water is not limited to tap water,
It includes liquid and gas. Therefore, the present invention is widely applied not only to water pipe work but also to plant piping and gas piping work.

[Prior Art] As an existing technology of this type, generally, a split T-shaped pipe and a working water control valve are used as indispensable for construction. A workable water control valve that is used without being left is known (for example, Japanese Patent Publication No. 38-98).
No. 28).

However, in the known art, since the branch tube portion of the split T-shaped tube shares the valve box portion that forms the valve seat, even if the valve body portion of the working water control valve is removable, The structure becomes complicated and its molding is difficult, resulting in a high price. Further, since the valve seat portion remains as a concave portion, it resists the flow of running water after the branching work is completed, resulting in pressure loss.

[Technical Problem of the Present Invention] In view of the above situation, an object of the present invention is to provide a novel branching construction method and a construction apparatus therefor by focusing on eliminating the valve seat of the branching cylinder. Challenge).

[Structure and Action of the Present Invention] In order to achieve the above object, the method for branching a fluid conduit according to the present invention has the following structure (technical means). That is, a split T-shaped pipe having a receiving portion in which a fixing brim is stretched outward is attached to a branch position of a fluid pipe, and then temporarily fixed to the fixing brim of the split T-shaped pipe and inserted later. The pipe main is pierced in an uninterrupted state by opening / closing the water control valve for work that can be disassembled around the opening that allows the insertion of the connection insertion pipe, and at the end of the branch pipe installed in advance or the branch pipe. At the end of the short pipe connected to the end of the connection insertion pipe, the receiving end of one end of the connection insertion pipe is slidably fitted while keeping airtightness, and the other end of the connection insertion pipe is attached to the work. It is mounted so that it can be inserted through the valve box of the water control valve in an airtight manner, and the flow of the fluid is started by opening the water control valve for the work and the connecting insertion pipe is opened in the valve box of the water control valve for the work. It is characterized in that it penetrates through the inside and is inserted into the receiving portion of the split T-shaped pipe, and then the working water control valve is removed.

Further, the fluid pipe branching construction device of the present invention is used for carrying out the construction method, and has the following configuration.
That is, the split T-shaped pipe is attached to the fluid conduit, the opening end of the branch tube is formed in the receiving portion, and the fixing flange is stretched outward on the end surface of the receiving portion. And a work water control valve that is detachably fixed through the fixing collar of the split T-shaped tube and has a perforated opening, and a work water control valve that is separable around the opening, and one end of the valve is The split T-shaped pipe is formed in an inlet portion which is watertightly inserted into the receiving portion and the opening of the working water control valve, and the other end portion is the inlet portion of the end portion of the branch pipe or the branch pipe. Connection insertion that is formed in the receiving part that fits the insertion part of the short tube inserted in the receiving part of the end part in a watertight and slidable manner, and projects the reaction ridge at the intermediate position. A pusher that is interposed between a pipe, the working water control valve, and the connection insertion pipe, and applies a reaction force to a reaction force protrusion of the connection insertion pipe to advance the connection insertion pipe. Comprising a tool, characterized in that.

[Effects] Since the present invention is configured as described above, it has the following unique effects.

According to the method of the present invention, since the valve box of the water control valve is not left at the branching portion after the branching work is completed, the inside of the fluid conduit becomes smooth and the loss of running water can be reduced.

According to the method of the present invention, since there is no portion protruding outward after the construction is completed, it can be carried out even in a shallow portion of the buried pipe, and the application range of the uninterrupted water branch construction can be expanded.

The split T-shaped tube of this device has a simple structure, the material cost, the manufacturing cost, and the like can be significantly reduced, and the weight can be reduced, so that the handling is easy and the construction cost at the time of construction can be reduced.

[Examples] Examples of the uninterrupted water branching construction method and device of the present invention will be described below with reference to the drawings.

1 to 4 show an embodiment of a method and a device for branching uninterrupted water according to the present invention.

First, the apparatus used for the uninterrupted water branching construction method of the present invention will be described.

Here, P is a water main, and a split T-shaped pipe 10 is arranged at a branch position of the water main P.

The split T-shaped pipe 10 is divided into an attached pipe portion 11 and a branch cylinder portion 12, and an end portion of the branch cylinder portion 12 is formed with a receiving portion 13 which allows insertion of a connection insertion pipe described later. Attached pipe part 11
Is divided into two parts 11a and 11b, both end faces are integrated by welding and watertightly attached around the main water pipe P.
It is possible to adopt a mode in which one of the attached pipe portions (cap members) 11a is omitted and the other attached pipe portion 11b is directly welded and fixed to the water mains P, and the attached pipe portions 11a and 11b are flanged together. It is also possible to adopt a mode of joining. Receptacle 13
An inner peripheral groove for accommodating the O-ring 14 is formed on the inner periphery of the
A fixing collar 15 is integrally formed on the outer end of the receiving portion 13 in the circumferential direction. Bolt insertion holes 15a are formed in the fixing collar 15 at appropriate intervals in the circumferential direction (see FIGS. 1 and 2).

The work water control valve 20 substantially includes a valve box 21 and the valve box 21.
It is formed of a valve body 24 housed inside and a valve rod 25 that drives the valve body 24. Working water control valve 2 shown in this embodiment
0 is a so-called valve rod non-elevating type.

The valve box 21 includes an upper valve box (hereinafter referred to as "bonnet") 22 and a lower valve box (hereinafter referred to as "valve box body").
Divided into 23. The bonnet 22 rotatably supports the valve rod 25, accommodates the valve rod 25 therein, and also accommodates the valve body 24 when the valve body 24 is opened.

The valve box main body 23 has a circular hole-shaped opening 26 for accommodating an insertion port 41 of a connection insertion tube 40, which will be described later, inserted therein. It should be noted that the valve box main body 23 is divided into an upper main body 23A and a lower main body 23B so that the valve box main body 23 can be disassembled vertically with a horizontal plane including the central axis of the opening 26 as a boundary. The upper and lower main bodies 23A and 23B are formed as flanges on the abutting surface 23C and are integrally assembled by a bolt and nut (not shown). The main body 23A and the bonnet 22 may be integrally formed or may be decomposed and decomposed.

The valve box body 23 has a valve seat surface of the valve body 24, and an O-ring 27 is attached to ensure the watertightness thereof. An O-ring 28 is also attached to the inner peripheral surface of the opening 26.
Both of these O-rings 27 and 28 are divided into two by the vertically divided structure of the valve body 23. Screw holes 21a and 21b are formed on the front and rear outer sides of the valve box 21.

The work water control valve 20 is fixed to the split T-shaped tube 10 with a fixing plate 30 in contact with the fixing flange 15 of the split T-shaped tube 10 and a fixing bolt 31 screwed into the screw hole 21a. Fixed plate 3
If 0 is a ring shape, it is divided into 20% or more, but it is not necessary to have a ring shape.

The punching device 35 includes a punching machine 36, a cutter 37, and an intermediate cylinder 38.
And adopts a known mechanism. The punching device 35 includes a flange 38 of an intermediate cylinder around the opening 26 of the working water control valve 20.
It is removably attached with a bolt 39 using a (see FIG. 2).

A part of the connection insertion tube 40 is formed in the insertion port 41, and the other end is formed in the reception port 42. The spout 41 is a water control valve 2 for work.
0 is inserted into the opening 26 and its outer peripheral surface is in contact with the O-ring 28 so as to be watertight.
It is fitted inside and its outer peripheral surface comes into contact with the O-ring 14 to perform a watertight function. By chamfering the tip of the insertion opening 41, the O-rings 28 and 14 can be smoothly inserted when inserted.
A packing accommodating recess 43 is formed at the tip of the receiving portion 42, and a flange 44 that extends outward is provided. 44a is a bolt insertion hole formed in the flange 44. An O-ring 45 is attached to the inner circumference of the receiving portion 42. The receiving portion 42 accommodates the insertion portion 51 of a short pipe (or the end of the branch pipe) described later in a watertight manner and slidably. Therefore, the packing 46, the push ring 47, and the bolt nut 48 are attached to the packing accommodating recess 43 flange 44 of the receiving portion 42, respectively. Connection insertion tube 40
A ridge 49 is continuously or discontinuously formed on the outer periphery of the intermediate portion of the.

The short pipe 50 is formed in a straight tube shape, one end 51 of which is inserted into the receiving portion 42 of the connection insertion pipe 40, and the other end 52 of which is inserted into the receiving portion 55 of the branch pipe R described later. A packing 56 and a push wheel 57 are deposited in the other end 52 and attached to the receiving portion 55 by a bolt nut 58.

The extrusion tool 60 includes a pressing plate 61, a screw rod 62, a feed nut 63, and a lock nut 64. The pressing plate 61 has a ring shape and is composed of two halves. The pressing plate 61 is formed in a concave portion 61a that engages with the pressure projection of the connection insertion tube 40 and a position corresponding to the screw hole 21b of the working water control valve 20. Bolt through hole 6
With 1b.

Screws 62 are engraved on the screw rod 62 over the entire length, and penetrate the bolt through holes 61 b of the pressing plate 61 to penetrate the work water control valve 20.
Is screwed into the screw hole 21b.

The lock nut 64 ensures that the threaded rod 62 is screwed and fixed in the threaded hole 21b of the working water control valve 20.

By the rotation of the feed nut 63, the thrust is transmitted from the pressing plate 61 to the reaction force projection 49, and the connecting insertion tube 40 is advanced. If the reaction force projection 49 of the connection insertion tube 40 also serves as the pressing plate, the pressing plate 61 is unnecessary.

In each of the above-mentioned members, the split T-shaped pipe 10 and the work water control valve 2
0, the connecting insertion tube 40, and the extrusion tool 60 have specific configurations, and constitute the device of the present invention.

An uninterrupted water branch construction method for a water pipe using the above equipment is performed by the following procedure.

(1) First, the working space is secured by excavating the ground at the position where the branch pipe of the water main P is arranged.

After the split T-shaped pipe 10 is attached to the main water pipe P at the branch position in a watertight manner (confirmed by a water pressure test), the work water control valve 20 is attached to the fixing collar 15 of the split T-shaped pipe 10 with the fixing plate 30. To install in a watertight manner.

After that, the perforation device 35 is attached in a watertight manner around the opening 26 of the valve box 21 of the working water control valve 20 through the intermediate cylinder 38.

(2) In this state, the valve body 24 of the working water control valve 20 is opened, the perforator 36 is driven to advance the cutter 37, and the branch hole Q is perforated in the water distribution main pipe P by the rotation of the cutter 37.

(3) When the perforation of the branch hole Q is completed, the cutter 32 is retracted together with the cut piece, the cutter 37 is housed in the intermediate cylinder 38, and the valve body 24 of the working water control valve 20 is closed (see FIG. 2). ). Then, the punching device 35 is removed.

(4) With the assembly of the connection insertion tube 40 and the short tube 50 reduced, it is carried into the space from which the punching device 35 has been removed.
The packings 46 and 56 and the push wheels 47 and 57 are previously stored in the short pipe 50. After that, the insertion opening 41 of the connection insertion tube 40 is mounted in the opening 26 of the working water control valve 20.

(5) The branch pipe R is arranged, the socket 55 is fitted to the end 52 of the short pipe 50, the packing 56 and the push ring 57 are sequentially mounted in the socket 55, and the joint is held with the bolt nut 58. Seal the part.

(6) Then, the extrusion tool 60 is interposed between the working water control valve 20 and the connection insertion pipe 40 (see FIG. 1).

(7) Open the valve body 21 of the work water control valve 20. As a result, the running water from the main water pipe P is guided to the branch pipe R via the connection insertion pipe 30 and the short pipe 40, and is brought into a conducting state.

(8) Next, the feed nut 63 of the extrusion tool 60 is tightened, the pressing plate 61 is advanced, and the connecting insertion tube 40 is pushed toward the receiving portion 13 of the split T-shaped tube 10 (see FIG. 3).

(9) The fixing ring 30 and the extrusion tool 60 are removed from the work water control valve 20, and then the work water control valve 20 is disassembled from the upper body 23A and the lower body 23B of the valve box body 23 to remove it from the connection insertion pipe 40. Remove.

(10) The packing 17 and the push ring 18 (divided in two) are attached to the socket 13 of the split T-shaped tube 10, and the push split is tightened by the bolt nut 19 to seal the joint (see FIG. 4).

The branch work is completed by the above process.

In place of the above steps (4) to (6), when the short tube 50 is inserted into the receiving portion 42 of the connection insertion tube 40 while maintaining a sufficient expansion / contraction length (so-called deep portion) The following steps can be taken for this.

(4a) The branch pipe R is arranged up to the rear position of the punching device 35 in parallel with the step (3) above.

(5a) The assembly of the connection insertion tube 40 and the short tube 50 is brought into the space from which the punching device 35 has been removed, in a state of being reduced in size. The short tube 50 has packings 46 and 56 and push wheels 47 and 5.
Deposit 7 in advance.

(6a) Connect the insertion port 41 of the connection insertion tube 40 to the work water control valve 20.
Of the short pipe 50, and the rear end of the short pipe 50 is inserted into the receiving portion 55 of the branch pipe R so that the short pipe 50 and the branch pipe R are watertight by a joint.

Thereafter, the extrusion tool 60 is interposed between the working water control valve 20 and the subsequent insertion pipe 40.

The present invention is not limited to the above embodiments, and various design changes can be made within the scope of the basic technical idea of the present invention. That is, the following aspects are included in the technical scope of the present invention.

It is possible to adopt a mode in which the short pipe 50 is omitted, the end portion of the branch pipe R is formed in the insertion opening portion, and the branch pipe R is directly inserted into the receiving portion 42 of the connection insertion pipe 40.

In the apparatus of this embodiment, the work sluice valve 20 is shown as a valve rod non-elevating type, but a valve rod ascending / descending type may be used.

[Brief description of drawings]

The drawings show an embodiment of the present invention, and FIGS. 1 to 4 show the process and apparatus of one embodiment thereof. P ... Fluid pipe (water mains), Q ... Branch hole, R ... Branch pipe, 10 ... Split T-shaped pipe, 12 ... Branch barrel, 13 ...
… Mouthpiece, 15 …… Fixing collar, 20 …… Water control valve for work,
21 ... Valve box, 22 ... Valve element, 26 ... Opening, 40 ...
Connection insertion tube, 41 ... insertion part, 42 ... receiving part, 49 ...
… Reaction force ridges, 50 …… Short pipes, 60 …… Extrusion tools

Claims (2)

[Claims] 1. A split T-shaped pipe (10) having a receiving portion (13) having a fixing brim (15) stretched outward is attached to a branch position of a fluid pipe (P), and then the split T-shaped pipe (10) is attached. A water control valve (20) for work that can be disassembled around the opening (26) that is temporarily fixed to the fixing collar (15) of the T-shaped pipe (10) and allows the insertion of the connection insertion pipe (40) to be inserted later. The main pipe of the pipeline is pierced by the opening / closing operation of the pipe without interruption, and the pipe is installed at the end of the branch pipe (R) installed in advance or
At the end of the short pipe (50) connected to the end of (R),
(0) The receiving end portion (42) of one end portion is slidably fitted while keeping airtightness, and the other end portion (41) of the connection insertion pipe (40) is connected to the working water control valve ( The valve box (21) of (20) is airtightly inserted into the opening (26) of the valve box (21), and the working water control valve (20) is opened to start fluid flow and the connection insertion pipe (40) is attached. Valve box (2) for work water control valve (20)
The receiving portion (13) of the split T-shaped tube (10) that penetrates through the opening (26) of (1)
An uninterrupted water branching construction method for a fluid pipe, characterized in that the working water control valve (20) is removed after the insertion. 2. A branch cylinder (1) attached to a fluid pipe (P).
A split T-shaped pipe (2) in which the opening end of (2) is formed in the receiving part (13) and a fixing brim (15) is stretched outward on the end surface of the receiving part (13). 10) and the valve box (21), which is detachably fixed through the fixing collar (15) of the split T-shaped tube (10) and has the opening (26),
6) A water control valve for work (20) that is separable around, and one end of the water control valve for work (20) in the receiving part (13) of the split T-shaped pipe (10) Of the branch pipe (R) or the end of the branch pipe (R) is formed in the opening (26) of the branch pipe (R) that is watertightly inserted. The insertion part of the short tube (50) inserted into the receiving part is formed in the receiving part (42) that fits in a watertight and slidable manner, and the projection (49) for reaction force is projected at the intermediate position. The connection insertion pipe (40) provided, and the work water control valve (20) and the connection insertion pipe (40) are interposed between the connection insertion pipe (40) and the reaction force projection of the connection insertion pipe (40). A construction device for uninterrupted water branching of a fluid pipeline, which comprises an extrusion tool (60) for advancing the connection insertion tube (40) by applying a reaction force to the (49).