JPH075355Y2 - Mounting device for perforating a branch communication port of a fluid pipe - Google Patents

Description

[Detailed Description of Device] a. Purpose of the Invention [Industrial field of application] The present invention relates to a branching work for branching a fluid pipe such as a water pipe or a gas pipe in which a fluid flowing through the fluid pipe is held in a conductive state. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a so-called mounting device for perforating a branch communication port, which is hermetically mounted at a branch position and is used for assisting a perforation work of a branch communication port, and more specifically, relates to improvement of an auxiliary function of the mounting device during perforation work.

[Conventional technology]

A mounting device for punching a branch communication port of this type is disclosed in, for example, Japanese Patent Laid-Open No.
It is known from the publication of 60-201808.

That is, in the above publication, "the fluid transport pipe is attached in a state of forming a sealed space between the fluid transport pipe and the outer surface of the peripheral wall of the transport pipe,
And, in a state in which this work case is connected to the work case connectable to the case in which the connection port portion for connecting the end portion of the other fluid transport pipe in a state of communicating with the closed space is formed. Fluid transport that can be inserted and moved into the connection case through the communication port of both cases, and that is inserted and moved while rotating around the axis along the insertion movement direction, so that the fluid is positioned on the insertion movement path. In a perforation device for a fluid transport pipe, which is provided with a cylindrical rotary cutter for cutting a peripheral wall portion of the fluid transport pipe, the peripheral wall of the fluid transport pipe being provided with a port for communicating the inside of the fluid transport pipe with the closed space, The rotary cutter is attached to the work case in a state where its rotary shaft core is located outside the fluid transport pipe, and the connection cable is detachably operated from the outside. The rotary cutter can be mounted and fixed inside the rotary cutter, and is automatically connected to the shaft core of the rotary cutter when the rotary cutter is inserted and fixed in the mounted and fixed state. A perforation device for a fluid transport pipe, which is provided with a member that can be held by the. The technology is disclosed.

With this configuration, after cutting, the connection between the holding member that is automatically connected to the shaft core of the rotary cutter is released from the connection case, and the rotary cutter is pulled out to cut the rotary cutter and the holding member. Since you can hold the peripheral wall part and take out the cutting peripheral wall part together with the rotary cutter,
While adopting a rational and efficient work form such as extracting the cutting peripheral wall part together with the rotary cutter, it is sufficient to use a power device for cutting and to operate only the rotary cutter with the minimum necessary .

However, according to the known technique, when the boring is completed, it is necessary to release the fixing of the holding member to the connection case in order to pull up the cutter and the cut piece of the peripheral wall of the cut pipe. Therefore, the release is performed by a mounting bolt provided on the lower bottom of the connection case, and not only the operation is complicated, but also the mechanism is complicated and leak processing is difficult.

[Problems to be solved by the invention]

In view of the above circumstances, the present invention has been made to solve the problems of the above-described conventional technology, and provides a mounting device that can automatically hold a cutting piece in a cutter. With the goal.

B. Configuration of the Invention [Means for Solving the Problems] The mounting device for perforating a branch communication port of a fluid pipe of the present invention has the following configuration (technical means) in order to achieve the above object. That is, it has a case body composed of at least an attached pipe portion, a perforated cylinder portion, and a branched pipe portion, and is attached across the branch position of the fluid pipe with the attached pipe portion, and is inserted into and removed from the perforated cylinder portion. A diverging communication port is bored in a fluid pipe by a cylindrical rotary cutter that is freely inserted, has a shaft rod at its center, and has a diameter-expanding locking means attached to the tip of the shaft rod. In the mounting device for communicating hole perforation, a plurality of cutting flat plates in a flat plate shape along the plane orthogonal to the center line of the perforating cylinder part are provided in the lower cylinder part of the perforating cylinder part, and the base is fixed to the inner surface of the cylinder wall. Is installed and stretched toward the center of the perforated cylinder portion, and a guide cylinder that receives the shaft rod of the rotary cutter in a penetrating manner is planted on these cutting flat plates, and the outer diameter thereof is the rotary cutter. The support plate, which is smaller than the inner diameter of It becomes, characterized in that.

[Action]

In the branch pipe installation work, after the case body was attached to the fluid pipe, the work water control valve was attached to the upper part of the perforation cylinder part, and further the perforation device with a cutter was attached to the fluid flow state, that is, under uninterrupted water. Open a branch communication port in the fluid pipe.

In the process of opening this branch communication port, the cutter inserts its shaft rod into the guide tube portion, and when the cutter completes the cutting of the branch communication port, the cutting flat plate is subsequently cut, and at this point the locking means of the guide tube is The restraint is released, whereby the locking means at the tip of the cutter shaft engages with the support plate. In this state, the cutter is pulled up to take out the cut piece while holding it.

〔Example〕

An embodiment of a mounting device for perforating a branch communication port of a fluid pipe of the present invention will be described with reference to the drawings.

FIGS. 1 to 3 show a mounting device (hereinafter, simply referred to as “mounting device”) S for branch communication port perforation, which is applied to a water pipe of the embodiment. That is, FIG. 1 shows the cross-sectional structure during the working process in which the main installation device S is attached to the water pipe, and FIGS. 2 and 3 show the internal structure of the main device S after completion of the work.

In the figure, P is a water supply main in a water pipeline,
Q is a branch communication port that is perforated by a perforator I at a branch point of the water supply main pipe P, and R is a cut piece thereof. Also, T
Is a branch pipe.

Thus, the mounting device S is mounted between the water supply main pipe P and the branch pipe T at the branch position of the water supply main pipe P.

Prior to the description of the apparatus of the present embodiment, a relevant portion of the punching machine 1 applied to the apparatus of the present embodiment, that is, the cutter portion C will be described.

As shown in FIG. 1, reference numeral 100 denotes a cutter body of the punching machine I, which has a right cylindrical shape and has a cutting edge 102 formed at its tip. The cutter body 100 has a drive shaft 10
Rotated by 4. Further, a cylindrical shaft rod 106 projecting below the cutting blade 102 surface is arranged at the center of the cutter body 100, and a predetermined distance from the cutting blade 102 surface is provided at the lower end portion of the shaft rod 106. The expanded diameter ring 108 having elasticity is attached to the existing position. The shaft 106 is not rotated with the drive shaft 104.

Therefore, these configurations belong to the known art.

With reference to FIGS. 1 to 3, the mounting device S of the present embodiment.
Includes a case body 4 including an attached pipe part 1, a perforation cylinder part 2 and a branch cylinder part 3, and is attached to a lower part of the perforation cylinder part 2 which is an essential part of the present invention. , A water stop lid 8 and an outer lid 9 and a locking bolt 10.

The detailed configuration of each unit will be described below.

The attached pipe portion 1 is composed of a pipe body 15 that holds the water supply main pipe P, and joint portions 16 at both ends of the pipe body 15.

In the attached pipe portion 1, two pipe bodies 15a and 15b are divided at a vertical plane including the central axis O of the water supply main pipe P as a boundary.
It is assembled together by abutting the 5c doshi and welding.

The joint portion 16 includes a receiving portion 16a, an annular rubber ring 16b loaded in the receiving portion 16a, a push ring 16c for pressing the rubber ring 16b, and a tightening bolt 16d. Thus, the rubber ring 16b is tightened via the push ring 16c to make the end portion of the attached pipe portion 1 watertight. 16e is a locking bolt for preventing removal.

The perforated tube portion 2 has a bottomed cylindrical shape with an opening at the top, is eccentric to the attached pipe portion 1 at a predetermined interval, and is attached in the vertical direction, and protrudes above and below the attached pipe portion 1. To do.

More specifically, an annular flange 18 is stretched outward at the upper end of the perforated tube portion 2, and bolt insertion holes 19 are provided in the flange 18 at predetermined intervals in the circumferential direction. ing.
The outer lid 9 and a work water control valve H, which will be described later, are attached by means of the flange 18 with attaching bolts and nuts 20.

Bolt holes 22 into which the locking bolts 10 are screwed are provided in the upper cylinder part of the perforated cylinder part 2 at predetermined intervals in the circumferential direction. A cap 23 is screwed into the bolt hole 22.

Further, a receiving shelf 25 for the water blocking lid 8 is annularly arranged below the bolt hole 22 at a predetermined interval. The receiving rack 25 has an L-shaped cross section, the lower end of the collar-shaped portion 25a serves as a mounting surface of the water blocking lid 8, and the inner diameter thereof is within a range that does not hinder the insertion operation of the cutter body 100 of the punching machine I. It is said that 25b is the inner surface of the vertical wall of the receiving shelf 25.

In the lower cylinder of the perforated cylinder 2, the bottom plate 27 has a drain pipe 28.
It is attached to the stool for discharging chips. The drain pipe
A water shutoff valve is appropriately attached to the end of 28.

The auxiliary member 6 for perforation is mounted in the lower tubular part of the perforated tubular part 2 and comprises a cutting flat plate 30, a support plate 31, a mounting bolt 32 and a guide tube 33.

More specifically, the cutting flat plate 30 is composed of a plurality of (3 in this embodiment) flat plates, which are equidistant from each other and whose bases are fixedly mounted on the inner wall surface of the perforating cylinder 2. It is extended toward the center. Bolt hole 30a at its tip
Is screwed.

The support plate 31 has a disk shape and is placed on the cutting flat plate 30, and the bolt insertion hole 3 is provided at a position corresponding to the screw hole 30a of the cutting flat plate 30.
1a is opened, and mounting bolts 32 are inserted into these holes 30a and 31a to fix them. The outer diameter of the support plate 31 is made sufficiently smaller than the inner diameter of the cutter body 100 of the punching machine I.

The guide cylinder portion 33 is erected at the center of the upper surface of the support plate 31, the inner hole 33a of the guide cylinder 33 is vertically penetrated, and is disposed in the center portion of the cutter body 100 of the punching machine I in the inner hole 33a. The shaft rod 106 is inserted. A tapered portion 33b is formed on the upper edge of the guide cylinder 33 so as to face the inner hole 33a, and assists the diameter reduction operation of the diameter expansion ring 108 of the cutter portion C.

FIG. 1 shows the relationship between the auxiliary member 6 for punching and the cutter portion of the punching machine I.

That is, the state of the figure is immediately after the completion of the punching work, and shows the state in which the diameter-expanding ring 108 of the shaft rod 106 inserted into the guide cylinder 33 is expanded in diameter on the lower surface of the support plate 31.

Returning to FIG. 1 to FIG. 3 again, the branch tube portion 3 that constitutes the case body 4 is fixed to the side surface portion of the perforated tube portion 2 in an orthogonal shape, and the flange 35 is stretched at its end portion. Become. Reference numeral 36 is a bolt insertion hole formed in the flange 35, and a mounting bolt / nut 37 is inserted into the bolt insertion hole 36. The branch pipe T is connected through the flange 35.

As shown in FIG. 2, the water shut-off lid 8 has a substantially disk shape, and a packing 40 is arranged on the outer periphery thereof, and the upper portion of the water shut lid 8 is used for attachment / detachment with an insertion device J described later. An engaging projection 41 is provided so as to project. 41a is a hole for the engagement. The water blocking lid 8 is placed on the collar portion 25a of the receiving rack 25 of the perforated cylinder portion 2,
The packing 40 is compressed and brought into contact with the inner wall surface 25b of the receiving shelf 25, and exhibits a water blocking effect.

Similarly, as shown in FIG. 2, the outer lid 9 is placed on the flange 18 of the perforated tube portion 2, and the bolt insertion holes 43 corresponding to the bolt insertion holes 19 of the flange 18 are opened. The mounting bolts and nuts 20 are inserted and fixed in 19,43. In this fixed state, the lower surface of the outer lid 9 comes into contact with the upper end surface of the engaging protrusion 41 of the water shut lid 8 to prevent the water shut lid 8 from rising.

Next, the operation of each member of the mounting device S will be described by taking as an example the branch pipe disposing work that is performed by using the mounting device S for branch communication opening perforation of the present embodiment (FIGS. 4 to 7). See figure). The upper and lower relations in the figure are non-essential matters, and the relative relation to the axis of the pipe P has priority.

Hereinafter, it demonstrates based on a construction procedure.

(1) The main body of the apparatus, that is, the case body 4 from which the water blocking lid 8 and the outer lid 9 are removed, is attached to the additional pipe section 1 at the planned branching position of the water supply main pipe P.
The two split parts 15a, 15b are abuttingly joined to each other so as to be mounted watertightly around the main water supply pipe P.

After that, the support plate 31 in which the guide cylinder 33 constituting the perforation assisting member 6 is planted in the lower cylindrical portion of the perforated cylindrical portion 2 of the case body 4 is mounted and fixed on the cutting flat plate 30 with the mounting bolts 32.
The guide cylinder 33 coincides with the central axis of the perforated cylinder portion 2.

In addition, in parallel with these operations, the branch pipe T is connected to the branch pipe portion 3
Connect to.

(2) As shown in FIG. 4, the water control valve H for the uninterrupted water work and the perforator I are sequentially mounted in a watertight manner on the upper part of the perforated cylinder portion 2 of the main mounting device S via the flange 18. In FIG. 4, 120 is the valve body of the water control valve H, 122 is the drive unit of the perforator I, 12
4 is the watertight cylinder.

In this state, the work water control valve H is opened, and the cutter portion of the punching machine I is inserted into the punching tubular portion 2.

(3) As shown in FIG. 5, the cutter body 10 of the punching machine I
The side portion of the water supply main pipe P is cut by the cutting edge 102 of 0 to form the branch communication port Q. In the middle of the process, the cutter part C
The diameter expanding ring 108 at the tip of the shaft rod 106 is once reduced in diameter and enters the guide cylinder 33. When the cutting of the branch communication port Q is completed, the cutter subsequently cuts the cutting flat plate 30 of the perforation assisting member 6, and when this cutting is completed, the cutter shaft rod 106
The diameter expansion ring 108 at the tip of the diameter expands and engages with the support plate 31.

FIG. 1 is an enlarged view of this state. As can be seen from the figure, the cutting piece R of the water supply main P is supported by the support plate 31 in the cutter body 100 of the cutter portion of the punching machine I. It becomes a state.

(4) As shown in FIG. 6, when the punching device I is operated by the pulling mechanism to pull up the cutter portion C, the shaft rod 106 of the cutter portion C and the support plate 31 are in the engaged state. The support plate 31 serves as a bottom cover of the cutter unit C, and the cutter body 10
The cutting piece R is lifted upward while holding the cutting piece R in 0. After that, the water control valve H is closed and the perforator I is removed.

(5) As shown in FIG.
The insertion device J detachably attached to the lower end of the above is watertightly mounted on the working water control valve H, and the water control valve H is opened to insert the water shut lid 8 up to the receiving rack 25 of the perforated cylinder 1. In FIG. 7, 132 is a drive part of the insertion device J, and 134 is its watertight cylinder.

After that, the locking bolt 10 penetrating the upper cylinder wall of the perforated cylinder portion 2 is pivotally advanced, and the tip end thereof is engaged with the upper edge of the water stop lid 8 to temporarily move the water stop lid 8. Fix it.

(6) Next, release the engagement between the water stop lid 8 and the insertion device J,
The insertion device J and the work water control valve H are removed.

After that, the outer lid 9 is placed and fixed on the perforated tube portion 2, and the work is completed. FIG. 2 shows this state.

Since the mounting device S of this embodiment is implemented in the above-described manner, the cutting piece R is automatically held in the cutter of the punching machine I, and the holding operation unlike the conventional one is unnecessary. Yes, this improves work efficiency. Another advantage of the apparatus S of the present embodiment is that a punching machine having an existing cutter is used and the versatility is high.

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

The cutting flat plate 30 and the support plate 31 can be fixed by an appropriate fixing means such as welding.

Instead of the locking means of the diameter expansion ring 108, the equivalent means, for example, a diameter expansion pin system in which the support plate 32 is supported by a pin which is elastically biased may be used.

C. Effect of the Invention According to the present invention, since the cut pieces of the cut fluid pipe are automatically held in the cutter, the working efficiency can be improved.

[Brief description of drawings]

FIG. 1 shows an embodiment of a mounting device for perforating a branch communication port of a fluid pipe of the present invention, FIG. 1 is a longitudinal sectional view of the device of the embodiment during a cutting process, and FIG. FIG. 3 is a vertical sectional view of the apparatus, FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIGS.
The figure is a diagram showing a work process of branching work in a water pipe. DESCRIPTION OF SYMBOLS 1 ... Attached pipe part, 2 ... Perforated pipe part, 3 ... Branch pipe part, 4 ... Case main body, 30 ... Cutting flat plate, 31 ... Support plate, 33 ... Guide pipe, 100
… Cutter body, 102… Cutting blade, 106… Shaft rod, 108… Expanding ring

Claims (1)

[Scope of utility model registration request] 1. A case main body comprising at least an attached pipe portion, a perforated cylinder portion, and a branch pipe portion, which is attached by straddling a branch position of a fluid pipe with the attached pipe portion. It is inserted into and removed from the shaft and has a shaft rod at its center, and the tip of the shaft rod has a cylindrical rotary cutter equipped with locking means capable of expanding the diameter. In the attachment device for piercing a branch communication port, a plurality of cutting flat plates in a flat plate shape along the plane orthogonal to the center line of the piercing cylinder part are provided in the lower cylinder part of the piercing cylinder part, and the base thereof is a cylinder wall. It is fixed to the inner surface and stretched toward the center of the perforated cylinder portion, and on these cutting flat plates, a guide cylinder that receives the shaft rod of the rotary cutter in a penetrating manner is planted, and its outer diameter is The support plate, which is smaller than the inner diameter of the rotary cutter, is mounted and fixed. An attachment device for perforating a branch communication port of a fluid pipe, which is characterized by the following.