JPH09159089A - Branch piping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a branch piping device which accurately drives a pin and is safer in its handling in carrying. SOLUTION: A branch piping device is so constituted that explosive 24 in a cap 23 fixed to an opening end 15 of a branching device 1 is exploded by driving a pin in a small hole bored in the bottom, a piston 18 in the branching device main body 1 is forcedly moved, a part of an established pipe (A) is bored by a cutting blade 19 in the tip of the piston 18, and thus the pipe is branched. A guide part 50 provided on the end face of the cap 23 is composed of a projecting part 51 projecting on the end face of the cap 23 concentric to the small hole, and a nut member 52 for threadly engaged with a male screw provided around the outer circumferential face of the projecting part 51. A driving pin 40 movably provided in the guide part 50 is composed of a trunk part 41 slidably formed in the projecting part 51, an insertion part 42 projecting from one end of the trunk part 41 concentric to the trunk part 41, and a driving part 43 projecting to the other end of the trunk part 41.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branch pipe device for branching a pipe by utilizing the explosive force of explosive powder.

[0002]

2. Description of the Related Art The applicant of the present application has already proposed a branch piping device of this type as a device as shown in FIG. That is,
In the figure, a piston 1 having a cutting blade at its tip
10 is arranged in the main body 101, and the open end 1 of the main body 101
In the cap 103 screwed to 02, the explosive 104 for forcibly moving the piston 110, the detonator 105 for exploding the explosive 104, and the pressing pin 106 for pressing the detonator 105 to ignite, are arranged, Further, a small hole 107 reaching the end of the pressing pin 106 is formed at the bottom of the cap 103.

In order to branch the pipe, the attached pin 120 is driven into the small hole 107 with a hammer or the like without stopping the fluid line of the pipe to explode the explosive powder 104 and move the piston 110. A part of the existing pipe is bored by a cutting blade at the tip of the piston 110 so that the existing pipe and the branch pipe connected to the main body 101 communicate with each other.

[0004]

This branch piping device is
After fixing the main body to the existing pipe, position the pin in the small hole of the cap with one hand and hit the pin with the hammer etc. with the other hand, so the pin may shift when hitting the hammer,
It sometimes entered at an angle to the axis of the small hole and did not ignite. In addition, due to conditions such as high places, dark places, narrow places, and branch points of existing pipes, it is difficult for even a skilled person to drive the pin accurately, and it may not ignite. Furthermore, if the pins are lightly driven into the small holes for positioning in advance, there is a problem that various conditions overlap, such as gunpowder being scattered all the way when it is driven in and not igniting even if the pin is strongly driven later, resulting in non-fire. It was

The present invention has been made in order to solve the above problems, and provides a branch pipe apparatus in which a pin can be accurately driven and which is safer to handle during transportation. With the goal.

[0006]

In order to achieve the above-mentioned object, the present invention explodes by expelling explosive in a cap fixed to the opening end of a branching device body into a small hole drilled in the bottom of the cap. Then, the piston in the main body of the branching device is forcibly moved, a part of the existing pipe is punched by the cutting blade at the tip of the piston, and in the branching pipe device for branching the pipe, it is driven into the guide part provided on the end face of the cap. A pin is provided so that it can move freely, and the gunpowder in the cap is exploded with this driving pin.

Further, the guide portion is composed of a projecting portion projecting concentrically with the small hole on the end surface of the cap, and a nut member screwed to a male screw provided on the outer peripheral surface of the projecting portion.
The driving pin includes a body portion slidably formed in the protrusion, an insertion portion for inserting a small hole projecting from one end of the body portion concentrically with the body portion, and the other end of the body portion. It may be a projecting driving section, and the driving section may be projected from an insertion hole formed in the nut member.

Since the driving pin housed in the guide portion moves along the axis of the small hole when it is driven in, it does not stop in the middle of the small hole, so that the explosive within the cap can be surely exploded. You can

Further, when the guide portion is composed of the projecting portion and the nut member, the nut member can be removed from the projecting portion. Therefore, the driving pin is taken out of the guide portion and the driving pin and the main body are stored or transported. It can be handled separately at different times. Also, by screwing the nut member into the projecting portion, the driving pin can be stored without jumping into the projecting portion, the driving portion of the driving pin can be projected from the insertion hole of the nut member, and Since the axial center of the small hole can be matched, it is easy to drive with a hammer or the like.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a vertical sectional view showing an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of an essential part of FIG.

As shown in FIG. 1, a main body 1 of a branch piping device.
Is a branch position of the existing pipe A by clamping the existing pipe A with a substantially semi-cylindrical clamping portion 11 and a substantially semi-cylindrical clamping piece 12 formed on the bottom and tightening both with a bolt (not shown). It is fixed to. Further, an O-ring 13 and a fireproof packing 14 are installed on the semi-cylindrical surface of the holding portion 11 that comes into contact with the existing pipe A, and the fireproof packing 14 extends between the holding portion 11 and the holding piece 12 so as to be held. 14a is molded. As described above, in this embodiment, the O-ring 13 is surrounded by the branch opening (not shown) formed in the existing pipe A.
Further, since the fireproof packing 14 is interposed between the outer peripheral surface of the existing pipe A and the main body holding portion 11, the sealing property is good, and fluid leakage from the contact surface between the existing pipe A and the main body 1 is prevented.

Further, a passage 16 for piston movement is formed inside the main body from the opening of the male screw-shaped opening end portion 15 formed on the side of the main body 1. The passage 16 intersects with the existing pipe A and The branching position of the existing pipe A is obscured. Further, a short-cylindrical female thread 17 for connecting a branch pipe (not shown) is provided above the branch position of the existing pipe A.

A piston 18 for piercing a branch port in a part of the existing pipe A is movably arranged on the open end side in the passage 16. This piston 18 is provided with a cutting blade 19 at the end portion (tip portion) on the side of the existing pipe, and an O-ring 20 on the outer peripheral surface of the end portion (rear end portion) on the opposite side. Also, a rectangular frame-shaped lock ring 21 is provided on the tip end side. And this lock ring 2
1 is a lock groove 21a formed on the inner peripheral surface of the passage 16 when the piston 18 is stopped after cutting the branch opening in the existing pipe A.
The piston 18 is prevented from returning due to fluid pressure. Further, the piston 18 is provided with a through hole 22 that connects the existing pipe A and the branch pipe, and the through hole 22 is located above the branch port when the piston 18 stops after cutting the branch port in the existing pipe A. To position.

A cap 23 containing explosives or the like is screwed onto the open end 15 of the main body 1. As shown in FIG. 2, this cap 23 has a bottom portion 23 provided with recessed portions 27, 28 and 29 for accommodating a short cylinder portion 23a having a threaded inner peripheral surface, an explosive powder 24, a detonator 25 and a pressing pin 26, respectively.
b, and these recesses 27, 28, and 29 are, in order from the inner end surface on which the short tubular portion 23a is projected, the explosive recess 27, the detonator recess 28 having a smaller diameter than the explosive recess 27,
Further, the depression 29 for the pressing pin has a smaller diameter than the depression 28 for the detonator.
Is provided. Further, a small hole 30 communicating with the recess 29 for accommodating the pressing pin is formed at the center of the bottom of the cap 23.

A guide portion 50 for accommodating the driving pin 40 is provided on the end surface of the cap 23 so as to be movable along the axis of the small hole 30, and the guide portion 50 has a protruding portion 51.
And a nut member 52. The projecting portion 51 is formed in a short tubular shape, is concentric with the small hole 30, and projects from the end surface of the cap 23. Further, a screw is provided on the outer peripheral surface. Further, the nut member 52 is detachably screwed to the projecting portion 51, and an insertion hole 53 for projecting the driving portion 43 of the driving pin 40, which will be described later, is bored in the bottom portion. The insertion hole 53 has a smaller diameter than the inner diameter of the protrusion 51.

The driving pin 40, which is movably accommodated in the guide portion 50, has a cylindrical body portion 41 whose outer diameter is substantially the same as the inner diameter of the projecting portion 51, and which is formed at one end of the body portion 41. Concentrically, the rod-shaped insertion portion 4 for inserting the small hole 30 of the cap 23
2 is projected, and the nut member 52 is attached to the other end of the body portion 41.
The columnar driving part 43 is provided so as to project from the insertion hole 53.

The guide portion is not limited to the above-mentioned structure, and it suffices that the driving pin can be moved along the axis of the small hole. For example, one end (driving portion) of the driving pin at the bottom. It may be a cap-shaped member having an insertion hole for projecting. Then, such a guide portion may be attached to the end surface of the cap on site, or fixed to the end surface of the cap. When the guide portion is fixed to the cap, it is fixed to the end surface of the cap after the driving pin is built into the guide portion. To do.

Next, the operation of this embodiment will be described. After attaching the main body 1 to the branch position of the existing pipe A without stopping the fluid line of the pipe, the tip of the insertion portion 42 of the driving pin is applied to the small hole 30 of the cap 23, and the protruding portion of the guide portion 50. When the driving pin 40 is inserted into 51 and the nut member 52 is screwed to the protruding portion 51, the driving portion 4 of the driving pin 4
3 protrudes from the insertion hole 53 of the nut member 52,
The insertion part 42 of the driving pin slightly goes into the small hole 30,
The branch piping is ready.

When the driving portion 43 of the driving pin protruding from the nut member 52 is hit with a hammer or the like, the inserting portion 42 of the driving pin pushes the pressing pin 26 provided at the back of the small hole 30 and the detonator 25 is removed. Ignite and explode the powder 26. At the same time as the explosive powder 26 explodes, the piston 18 is forcibly moved by the explosive force of the explosive powder 26, and the cutting blade 19 provided at the tip cuts a part of the existing pipe A to branch the existing pipe A.

As described above, in the branch piping device of this embodiment, since the projecting portion 51 is provided concentrically with the small hole 30, when the driving pin 40 is driven, the small pin 30 is axially centered. Since the driving pin 40 is driven without tilting, the explosive 24 can be surely exploded. Also,
Since the driving pin 40 is attached to the main body 1, the driving pin 40 can be easily driven even in a place where the body is in a bad position. Furthermore, by removing the driving pin 40 and the nut member 52 of the guide portion 50 from the protruding portion 51 until the main body 1 is attached to the existing pipe A, the explosive powder 24 is prevented from exploding due to accident and the safety during transportation is improved. Can be increased. Then, by screwing a protective cap or the like (not shown) onto the protrusion 51, it is possible to prevent foreign matter from entering the protrusion 51 and eliminate the anxiety of the operator.

[0021]

As described above, the present invention provides:
When you hit the hammer, the driving pin does not move and does not enter diagonally with respect to the axis of the small hole, so you can prevent the driving pin from being mistaken even in bad conditions such as high places, dark places, and narrow places. It is possible to prevent misfire. Further, since it is not necessary to lightly drive the driving pin in advance to align the axes of the small hole and the driving pin, the explosive powder will not be scattered.

Further, since the guide portion of the present invention has a simple structure, it is possible to provide the branching pipe device in which the driving pin can be accurately driven and the handling is safe, at low cost.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a partial cross-sectional perspective view of the above embodiment.

FIG. 3 is a vertical partial sectional view showing a cap structure of a conventional branch piping device.

[Explanation of Codes] 1 Main body 15 Open end 18 Piston 19 Cutting blade 23 Cap 24 Explosive 30 Small hole 40 Driving pin 41 Body part 42 Inserting part 43 Driving part 50 Guide part 51 Projection part 52 Nut member 53 Insertion hole

Claims (2)

[Claims] 1. An explosive in a cap fixed to an opening end of a branching device body is exploded by hitting a pin into a small hole drilled in the bottom of the cap, forcibly moving a piston in the branching device body, and a piston tip. In a branch piping device for branching a pipe by piercing a part of an existing pipe with a cutting blade of a part, a driving pin is movably provided in a guide part provided on the end face of the cap, and the explosive in the cap is provided by the driving pin. A branch piping device characterized in that it is designed to explode. 2. The guide portion is composed of a projecting portion that is provided concentrically with the small hole on the end surface of the cap, and a nut member that is screwed to a male screw provided on the outer peripheral surface of the projecting portion. The pin includes a body portion slidably formed in the protruding portion, an insertion portion for inserting a small hole that is provided concentrically with the body portion from one end of the body portion, and a protruding portion at the other end of the body portion. 2. The branch piping device according to claim 1, wherein the branching piping device is formed of a driven driving portion, and the driving driving portion protrudes from an insertion hole provided in the nut member.