JPH0446673A - Method for plugging gap space in lance pipe and lance pipe - Google Patents

Abstract

PURPOSE:To press-weld packing into inner wall of a spacer with an inner pipe and to strengthen bonding of a lance pipe and the spacer by fitting the packing to outer end part of the inner pipe in the lance pipe, pressing in the one end of spacer and deforming as expansion-opening the end part of inner pipe. CONSTITUTION:The packing 10 is fitted to the outer end part of inner pipe 2 in the lance pipe P, and outer surface of outer pipe 1 in the lance pipe P is brought into contact with inner surface of the spacer P1, and end parts of plural metal wires 3 are made to bending condition so as to expansion-open these to the radial direction. Further, the end part of inner pipe 2 is made to the extended diameter condition and the packing 10 is made to press-welding condition on the inner surface of spacer P1 and on the end face of outer pipe 1, and as gas space 5 between the outer pipe 1 and the inner pipe 2 is plugged with the packing 10, bonding between the lance pipe P and the spacer P1 can be strengthened.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention is applicable to structures such as reinforced concrete and other structures, metal materials such as steel frames, refractories such as fire bricks, rocks, or underwater structures. The present invention relates to a method for closing a gap in a lance pipe for an oxygen lance used for drilling, cutting, and disassembling objects to be welded, such as structures and reefs, while melting them, and the lance pipe.

(Conventional technology) Oxygen lance cutting involves attaching the proximal end of the lance pipe to a holder, flowing high-pressure oxygen into the pipe from the holder, and igniting and burning the tip of the lance pipe while exposing it to the oxygen jetting out. The object to be melted is perforated and cut using the high heat caused by the oxidation reaction at the tip of the lance pipe, flame, and mechanical pressure.

As described in Japanese Patent Application Laid-Open No. 53-113247, a conventional lance pipe has a metal inner pipe inserted into an outer pipe, and a slight gap is left between the outer pipe and the inner pipe. , a plurality of metal wires are arranged inside the inner tube, a gap between the outer tube and the inner tube is used as the first gas flow passage, and a plurality of first gas flow passages are provided inside the inner tube. has been done.

However, with lance pipes such as those mentioned above, oxygen is also supplied to the gap between the outer and inner tubes, which tends to cause excessive combustion, and the outer and inner tubes burn quickly, causing the flame to become concentrated. If the lance is not properly formed, the efficiency of fusing and drilling will be significantly reduced, and if the lance is not formed in a way that allows oxygen to exit uniformly from between the outer tube and the inner tube, the lance will continue to burn unevenly, resulting in uneven wear. There are disadvantages such as the flame is easily generated, the flame tends to spread outward, it is difficult to concentrate only on a predetermined melting point of the object to be melted, and it is difficult to perform efficient cutting and drilling work.

Therefore, in order to solve these difficulties, the applicant of the present application developed a lance pipe for oxygen lance (Utility Model No. 62142471).
No.) was proposed. It consists of an outer tube, an inner tube inside the outer tube, and a plurality of metal wires inside the inner tube. Each metal wire inside the inner tube is inscribed on the inner surface of the inner tube. At the same time, the adjacent metal wires are circumscribed and arranged in a substantially annular shape, and the part surrounded by the metal wires is a relatively large space as the main oxygen flow path, and the adjacent metal wires and the inner surface of the inner tube are connected to each other. The surrounded part is a sub-oxygen flow path which is a smaller space than the main oxygen flow path, and a gap space is formed between the inner surface of the outer tube and the outer surface of the inner tube, and this gap space is used to connect the outer tube and the inner tube. It is configured to be closed by a closing portion provided at the proximal end, thereby blocking the supply of oxygen into the gap space.

(Problems to be Solved by the Invention) When closing the gap space of the lance pipe, the outer pipe is often caulked into a belt shape along the circumferential direction using, for example, a press machine or a roll machine. However, since caulking using a press or roll machine is performed with a fairly strong force, the arrangement of the metal wires arranged in a ring may become uneven, the outer tube or inner tube may be distorted, and oxygen leakage may occur. The flow state and flow rate are not constant and become non-uniform, causing variations in the combustion state in the circumferential direction of the lance pipe.
There were drawbacks such as the inability to obtain a uniform and stable combustion state.

In addition, many lance pipes are available with different diameters depending on the purpose of use, fusing capacity, etc.
Since lance pipe holders corresponding to these dimensions are selectively used, it is difficult to prepare all lance pipe holders corresponding to the lance pipes because it is not economical.

Therefore, the present invention makes it possible to reliably close the gap space of the lance pipe configured as described above, and also to enable these closing means to be performed simply and quickly, and to connect the lance pipe of a predetermined outer diameter to other lance pipes. A spacer with a specified outer diameter is connected to the base end of the lance pipe so that it can be attached to a lance pipe holder corresponding to the outer diameter, and the gap space can be closed at the same time. It was created with the aim of making it easier to manufacture lance pipes with high cutting and perforating ability.

(Means for Solving the Problem) Therefore, in the method of closing the gap space in the lance pipe of the present invention, the inner tube 2 is installed inside the outer tube 1 so that the gap space 5 is appropriately provided, and a plurality of The metal wires 3 are inscribed on the inner surface of the inner tube 2 and adjacent metal wires 3 are circumscribed to form a substantially annular shape. A lance pipe P is formed that slightly protrudes from the end portion. Then, the space closing packing 10 is fitted onto the proximal end portion of the inner pipe 2 of the lance pipe P.

On the other hand, a spacer P1 is formed which has the other end portion of a predetermined outer diameter that can be attached to the receiver 20 and can be gripped by a lance pipe holder as appropriate. Then, the base end portion of the lance pipe P is forcibly inserted into one end of the spacer P1, and the plurality of metal wires 3 of the lance pipe P are expanded into a substantially conical shape provided at the tip of the receiver 20. contacting the inclined surface of the projection 21 and gradually bending so as to expand in the radial direction,
At the same time as this metal wire 3 is bent, the inner tube 2 is folded into a plurality of metal wires 3.
deform it so that it expands in diameter. Furthermore, while pressing the space closing gasket 10 onto the inner surface of the spacer P1,
A means is provided to close the gap space 5- between the inner surface of the outer tube 1 and the outer surface of the inner tube 2 with a space closing packing 10, and to connect the outer tube 1 and the spacer P1 by appropriate coupling means such as welding or caulking. Adopted.

In addition, in another method of closing a gap space in a lance pipe according to the present invention, an inner tube 2 is installed inside an outer tube 1 so that an appropriate gap space 5 is provided, and a plurality of metal wires 3 are inserted into the inner tube. The metal wires 3 are inscribed in the inner surface of the tube 2 and adjacent metal wires 3 are circumscribed to form a substantially annular shape, with the proximal end portions of the inner tube 2 and the metal wires 3 slightly protruding from the proximal end portion of the outer tube 1. A lance pipe P is formed. Then, a space closing gasket 10 is fitted onto the base end of the inner pipe 2 of the lance pipe P, and a spacer P1 having a predetermined outer diameter that can be gripped by a lance pipe holder is fitted onto the base end of the lance pipe P. fit. Then, the plurality of metal wires 3 of the lance pipe P
is brought into contact with the inclined surface of the substantially conical expansion protrusion 21 provided at the tip of the receiver 20, and the proximal end portion of the lance pipe P is forcibly pressed against the expansion protrusion 21, so that the radial direction At the same time as the metal wires 3 are bent, the inner tube 2 is deformed by a plurality of metal wires 3 so as to expand in diameter. Further, the space-closing packing 10 is pressed against the inner surface of the spacer P1, the gap space 5 between the inner surface of the outer tube 1 and the outer surface of the inner tube 2 is closed by the space-closing packing 10, and the outer tube 1 and the spacer P1 are closed. A method was adopted in which the parts were connected by appropriate joining means such as welding or caulking.

Furthermore, in the lance pipe of the present invention, a plurality of metal wires 3 are arranged in a substantially annular shape in the inner tube 2 housed in the outer tube 1, and the base end portions of the inner tube 2 and the metal wires 3 are connected to the outer tube. A lance pipe P formed to slightly protrude from the base end portion of 1;
A spacer P1 of a predetermined outer diameter is fixed to the proximal end of the outer pipe 1 of the lance pipe P, and a spacer P1 of a predetermined outer diameter is fixed to the proximal end of the outer pipe 1 of the lance pipe P. Space-occluding gasket 1 that is pressed against the surface and the inner surface of spacer P1
It consists of 0. The spacer P1 is connected to the outer tube 1 of the lance pipe P through an appropriate coupling means such as welding or caulking. Further, the plurality of metal wires 3 which are inscribed in the inner surface of the inner tube 2 and arranged adjacent to each other in a substantially annular shape are bent so that their base end portions are respectively expanded in the radial direction,
Further, the base end portion of the inner tube 2 is deformed and expanded in diameter so as to surround each of the base end portions of the metal wires 3. after that,
A gap space 5 provided between the inner surface of the outer tube 1 and the outer surface of the inner tube 2
A means is adopted in which the space is closed by the space-closing gasket 10.

(Function) According to the method for closing the gap space in the lance pipe of the present invention, when the proximal end portion of the lance pipe P is forcibly press-fitted into the spacer P1, the outer pipe 1 of the lance pipe P is The metal wires 3 of the lance pipe P are inserted so that the surface thereof is in contact with the inner surface of the spacer P1, and the metal wires 3 of the lance pipe P are inserted into the receiver 20.
The inner tube 2 is gradually bent to expand in the radial direction by coming into contact with the inclined surface of the substantially conical expansion protrusion 21 provided at the tip.
is deformed so as to be expanded in diameter by the plurality of bent metal wires 3. Moreover, the space closing packing 10 is pressed against the inner surface of the spacer P1 by the inner tube 2 which is deformed into an enlarged diameter shape.
The space between the outer surface of the inner tube 2 and the inner surface of the spacer P1 is blocked, and the gap space 5 is closed. Furthermore, the spacer P1 is connected to the outer pipe 1 of the lance pipe P via an appropriate coupling means.
The spacer P1 is fixed to the lance pipe P.

In addition, in another method of closing a gap space in a lance pipe according to the present invention, when the proximal end portion of the lance pipe P is forcibly pressed against the expansion protrusion 21, the lance pipe P
The plurality of metal wires 3 are 1. The inner tube 2 is gradually bent to expand in the radial direction by coming into contact with the inclined surface of the substantially conical expansion protrusion 21 provided at the tip of the receiving body 20. It deforms so that it is expanded in diameter. Moreover, the space-closing packing 10 is pressed against the inner surface of the spacer P1 by the inner tube 2 that is deformed into an expanded diameter shape, and blocks the space between the outer surface of the inner tube 2 and the inner surface of the spacer P1, thereby closing the gap space 5. state. Further, the spacer P1 is connected to the outer tube 1 of the lance pipe P via an appropriate coupling means, so that the spacer Pi is fixed to the lance pipe P.

Furthermore, in the lance pipe of the present invention, the outer tube 1 of the lance pipe P is connected to the spacer P1 by an appropriate coupling means, and the base end portions of the plurality of metal wires 3 are expanded in the radial direction. It will be in a bent state like this. Moreover, the inner tube 2
is in a deformed and enlarged state in which its base end portion surrounds the base end portion of the metal wire 3. The space-occluding gasket 10 receives pressure from the proximal end of the inner tube 2, comes into pressure contact with the inner surface of the spacer P1, and closes the gap space 5 provided between the inner surface of the outer tube 1 and the outer surface of the inner tube 2. . Then, this spacer 21 portion is attached to the lance holder.

(Example) Hereinafter, the present invention will be explained with reference to illustrated examples.

In the figure, P indicates a lance pipe used as an oxygen lance. The inner tube 2 consists of an inner tube 2 and a plurality of metal wires 3 (mainly made of iron) installed inside the inner tube 2. The metal wires 3 are inscribed in each inner surface, and the adjacent metal wires 3 are circumscribed and arranged in a ring shape to form a gap space 5 between the inner surface of the outer tube 1 and the outer surface of the inner tube 2. Lance pipe P surrounded by
1 is configured as a main oxygen flow path, and each portion surrounded by adjacent metal wires 3 and the inner surface of inner tube 2 is configured as a sub oxygen flow path.

Furthermore, the proximal end portions of the inner tube 2 and the metal wire 3 protrude outward from the proximal end portion of the outer tube 1, and the proximal end portion of the inner tube 2 is further protruded from the proximal end portion of the metal wire 3. It is formed to protrude slightly outward.

By the way, the inner tube 2 has an outer diameter smaller than the inner diameter of the outer tube 1 and is arranged so as to be concentric with the outer tube 1 (although it does not necessarily have to be concentric). By holding the provided appropriate holding means, the inner surface of the outer tube 1 and the inner surface of the inner tube 2 are
A gap space 5 is secured between the outer surface and the outer surface. That is, the specific means for holding the inner tube 2 within the outer tube 1 is as follows:
Partial welding means, partial caulking means, and other appropriate means can be employed. Furthermore, the position, number, etc. of the holding means can be freely set. Further, the outer tube 1 may be constructed of a plurality of multiple tubes, or may be constructed by providing appropriate gaps between these multiple tubes, or any other suitable configuration may be adopted.

In addition, the specific configuration, shape, size, material, number of metal wires 3, cross-sectional shape of each of the gap space 5, the main oxygen flow path, and the auxiliary oxygen flow path, The ratio of cross-sectional area, etc. can also be set freely as appropriate.

In the figure, P1 indicates a spacer which is fixed to the proximal end portion of the lance pipe P as described above and has the other end portion of a predetermined outer diameter that can be gripped by a lance pipe holder as appropriate, and this spacer P1 is made of metal. (Mainly made of iron)
It is made of pipe material and is configured to be connectable to the outer tube 1 of the lance pipe P by appropriate coupling means.

Note that the spacer P1 may be of any type as long as it can be easily and reliably attached to the lance holder.For example, the spacer P1 may be provided with a tightening part on one end that gradually reduces in diameter from one end toward the center. It may also have a different configuration. That is, simply by forcibly press-fitting the lance pipe P into this tightening portion, the outer tube 1 of the lance pipe P is fixed to the spacer P1. By the way, the tightening state of the tightening portion may be a relatively gentle curved narrowing state, a relatively gentle linear narrowing state, a relatively gentle compound curved narrowing state, or the like. Also, spacer P
The specific shape, dimensions, material, etc. of 1 can also be freely set as appropriate.

The space-closing packing 10 is made of a rubber material, a synthetic resin material, or a relatively ductile metal material (for example, copper, lead, etc.).
or an alloy thereof) or an appropriate paper material, etc., and is fitted onto the inner tube 2 of the lance pipe P, and is formed so as to sufficiently close the gap space 5 at the proximal end surface of the outer tube 1. ing. In addition, its specific configuration, shape,
Dimensions, materials, etc. can be freely set as appropriate.

The receiver 20 has a generally conical (or polygonal pyramid) expanding protrusion 21 protruding from its distal end portion to be inserted into the spacer P1, and its proximal end portion can be stably gripped with an appropriate chuck or the like. It is designed so that it can be The receiver 20 to which the spacer P1 can be attached is formed so that its distal end can be inserted into the other end of the spacer P1, and its proximal end is in contact with the other open end surface of the spacer P1. It has a structure with a possible step. That is, while stably supporting the spacer P1, the spacer P1
One end is shaped so that it can reliably receive and stop a certain amount of force. By the way, the specific shape, dimensions, and material of the receiver 20 and the specific shape of the expansion protrusion 21 (for example, a cone with a curved slope, a cone with a straight slope, etc.) ), dimensions, etc. of lance pipe P and spacer P1
It can be freely set as appropriate depending on the shape, dimensions, etc.

Then, the method for closing the gap space in the lance pipe P of the present invention is to first attach the base end portion of the inner pipe 2 of the lance pipe P.
A space closing gasket 10 is fitted around the proximal end so as to close the opening of the gap space 5, and the other end of the spacer P1 is attached to the distal end portion of the receiver 20, and the receiver 20 is moved by appropriate means. (e.g., grip it with a chuck as appropriate),
The spacer P1 is stably supported by the receiver 20 (see FIG. 1).

Then, insert the proximal end of the lance pipe P into one end of the spacer P1, and insert the outer pipe 1 of the lance pipe P.
The outer surface is brought into contact with the inner surface of spacer P1 (see Figure 2).

Furthermore, the lance pipe P is forcibly press-fitted, and the plurality of metal wires 3 of the lance pipe P are brought into contact with the inclined surface of the expansion protrusion 21 at the tip of the receiver 20, and the metal wires 3 are forced to expand in the radial direction.
Each of the metal wires 3 is bent gradually, and at the same time as the metal wires 3 are bent, the inner tube 2 is deformed so as to expand in diameter by the plurality of metal wires 3 (see FIG. 3).

At this time, the inner tube 2 is greatly deformed only at the part where the metal wire 3 is in contact with it, and the base end of the metal wire 3 bites into the inner tube 2 (see Fig. 4), and the metal wires 3 and the inner tube 2 each deform. Mutual bonding is strengthened. In addition, the space-closing packing 10 is made such that the deformed portion of the inner tube 2 is brought into pressure contact with the inner surface of the spacer P1 and the proximal end surface of the outer tube 1, so that the opening portion at the proximal end of the gap space 5 is appropriately deformed. Obstructed Patsukin 10
Then, the spacer P1 is fixed to the lance pipe P by connecting the outer tube 1 and the spacer P1 by appropriate coupling means such as welding or caulking.

In addition, when forcibly press-fitting the base end of the lance pipe P, the metal wire 3
The tip end of the lance pipe P is also pressed to prevent the inner pipe 2 from slipping.

The lance pipe P to which the spacer P1 is fixed is used for fusing and drilling operations by attaching the other end of the spacer P1 to a holder.

By the way, the means for forcibly press-fitting the lance pipe P into the spacer P1 includes, for example, a chuck that can grip and hold the lance pipe P, and a chuck that can grip and hold the receiver 20.
A device that allows these chucks to approach each other using hydraulic pressure may be used, or other suitable forced press-fitting means may be employed.

Further, in another method of closing the gap space in the lance pipe P of the present invention, first, a space closing packing is attached to the base end portion of the inner pipe 2 of the lance pipe P so as to close the opening of the gap space 5 at the base end. At the same time, the spacer P1 is fitted onto the base end portion of the lance pipe P (see FIG. 5). At this time, the receiver 20 is held by appropriate means (eg, gripped by an appropriate chuck).

Then, connect the plurality of metal wires 3 of the lance pipe P to the receiver 2.
The metal wires 3 are brought into contact with the inclined surface of the expansion protrusion 21 at the tip of the lance pipe P, and the proximal end portion of the lance pipe P is forcibly pressed against the expansion protrusion 21, so that the metal wires 3 are gradually expanded in the radial direction. At the same time as the metal wires 3 are bent, the inner tube 2 is deformed so as to expand in diameter by the plurality of metal wires 3. At this time, the space-closing packing 10 was pressed so that mainly the deformed portion of the inner tube 2 was brought into pressure contact with the inner surface of the spacer P1 and the proximal end surface of the outer tube 1, and the opening portion at the proximal end of the gap space 5 was appropriately deformed. (See Figure 6)
Then, the spacer P1 is fixed to the lance pipe P by connecting the outer tube 1 and the spacer Pi by appropriate coupling means such as welding or caulking.

The lance pipe P of the present invention, in which the gap space 5 is closed by the above-mentioned method, is composed of the lance pipe P constructed as described above, the spacer P1, and the space closing packing 10, and the spacer pipe P is provided at the proximal end of the lance pipe P. In addition to fixing P1, the gap space 5 at the proximal end of the lance pipe P is closed with a space closing packing 10.

That is, the space closing packing 10 is fitted onto the base end of the lance pipe P, the outer surface of the outer tube 1 of the lance pipe P is brought into contact with the inner surface of the spacer P1, and the base end portions of the plurality of metal wires 30 are each radiated. At the same time, the inner tube 2 is bent to expand in the direction, the proximal end portion of the inner tube 2 is expanded in diameter, and the space closing packing 10 is pressed against the inner surface of the spacer P1, and the outer tube 1 is pressed against the proximal end surface of the outer tube 1. As such, the gap space 5 provided between the inner surface of the outer tube 1 and the outer surface of the inner tube 2 is closed with a space closing packing 10.

Furthermore, the spacer P1 is connected to the outer pipe 1 of the lance pipe P through an appropriate coupling means such as welding or caulking. Further, the base end portion of the inner tube 2 is deformed and expanded in diameter so as to surround the base end portions of the metal wires 3.

(Effects of the Invention) Therefore, in the method for closing a gap space of the present invention, the inner tube 2 is installed inside the outer tube 1 so that the gap space 5 is appropriately provided, and a plurality of metal wires 3 are attached to the inner surface of the inner tube 2. The metal wires 3 are inscribed and adjacent to each other and are arranged in a substantially annular shape,
A lance pipe P is formed by making the proximal end portion of the metal wire 3 slightly protrude from the proximal end portion of the outer tube 1, and a space closing packing 10 is externally fitted onto the proximal end portion of the inner tube 2 of this lance pipe P. On the other hand, a spacer P1 having the other end portion with a predetermined outer diameter that can be attached to the receiver 20 and gripped by a lance pipe holder as appropriate is formed, and this spacer P1
The proximal end of the lance pipe P is forcibly inserted into one end of the lance pipe P, and the plurality of metal wires 3 of the lance pipe P are connected to the inclination of the substantially conical expansion protrusion 21 provided at the tip of the receiver 20. The metal wires 3 are brought into contact with the surface and gradually bent to expand in the radial direction. At the same time as the metal wires 3 are bent, the inner tube 2 is deformed so as to expand in diameter by a plurality of metal wires 3, and the space-occluding packing 10 is formed. A gasket 10 that closes the gap 5 between the inner surface of the outer tube 1 and the outer surface of the inner tube 2 is pressed against the inner surface of the spacer P1.
Since the outer pipe 1 and the spacer P1 are connected by appropriate coupling means such as welding or crimping, when the gap space 5 of the lance pipe P is closed, it is necessary to use a press machine, a roll machine, etc. that exerts a fairly strong crimping mechanism. This eliminates the need for caulking, which can prevent the arrangement of the plurality of metal wires 3 arranged in an annular shape from being disordered or uneven, and the outer tube 1 and inner tube 2 to be distorted. The flow state and flow rate become constant and uniform, and the combustion state in the circumferential direction of the lance pipe P becomes uniform without variation, allowing a stable combustion state to be obtained, and the original welding cutting ability is improved. A lance pipe P whose gap space 5 is reliably closed without any risk of damage.
can be manufactured easily and reliably.

In particular, the gap space 5 of the lance pipe P can be closed at the same time as the spacer P1 is connected to the base end of the lance pipe P. Moreover, the spacer P1 can be used to remove the lance pipe P that could not be attached to the specified lance pipe holder.
It can be installed by connecting the lance pipe P.
There is no need to prepare all the lance pipe holders according to the diameter of the lance pipe, making it extremely economical.

Another method of closing a gap space according to the present invention is to install an inner tube 2 inside an outer tube 1 so as to provide an appropriate gap space 5, and to inscribe a plurality of metal wires 3 into the inner surface of the inner tube 2. At the same time, adjacent metal wires 3 are circumscribed and arranged in a substantially annular shape, and the proximal end portions of the inner tube 2 and the metal wires 3 are slightly protruded from the proximal end portion of the outer tube 1 to form a lance pipe P, A space closing packing 10 is fitted onto the proximal end of the inner pipe 2 of the lance pipe P, and a spacer P1 having a predetermined outer diameter that can be gripped by a lance pipe holder is fitted onto the proximal end of the lance pipe P. The plurality of metal wires 3 of the lance pipe P are connected to a substantially conical expansion protrusion 21 provided at the tip of the receiver 20.
At the same time, the proximal end portion of the lance pipe P is forcibly pressed against the expansion protrusion 21, and is gradually bent so as to expand in the radial direction. The tube 2 is deformed so as to expand in diameter with a plurality of metal wires 3, and the space closing packing 10 is brought into pressure contact with the inner surface of the spacer P1, and the gap space 5 between the inner surface of the outer tube 1 and the outer surface of the inner tube 2 is closed. The space is closed with a seal 10, and the outer tube 1 is closed.
and the spacer P1 are connected by appropriate coupling means such as welding or caulking, so that when the gap space 5 of the lance pipe P is closed, there is no need to caulk it using a press machine, a roll machine, etc. that exerts a fairly strong caulking mechanism. This may cause the arrangement of the plurality of metal wires 3 arranged in a ring to be disordered or uneven, and the outer tube 1 and inner tube 2 may also be distorted.
The flow state and flow rate of oxygen become constant and uniform, and the combustion state in the circumferential direction of the lance pipe P becomes uniform without variation, allowing a stable combustion state to be obtained. It becomes possible to easily and reliably manufacture a lance pipe P in which the gap space 5 is reliably closed without causing any risk of impairing the performance.

Moreover, the lance pipe P that could not be attached to the specified lance pipe holder can now be attached by connecting the spacer P1, eliminating the need to prepare all the lance pipe holders according to the diameter of the lance pipe P, which is extremely economical. It will be excellent.

In particular, since the spacer P1 is fitted onto the lance pipe P in advance and the gap space 5 is closed by the receiver 20, the spacer PL can be stably attached to the lance pipe P. , interstitial space 5
This makes it easier to close the area. Moreover, there is no need for a configuration that allows the spacer P1 to be stably attached to the receiver 20, and the receiver 20 can be configured more simply.

Furthermore, in the lance pipe P of the present invention, a plurality of metal wires 3 are arranged in a substantially annular shape in an inner tube 2 that is housed in an outer tube 1, and the base end portions of the inner tube 2 and the metal wires 3 are connected to the outer tube 1. A lance pipe P formed to slightly protrude from the proximal end portion, a spacer P1 having a predetermined outer diameter that is fixed to the proximal end portion of the outer pipe 1 of the lance pipe P, and an inner pipe of the lance pipe P. It consists of a space closing packing 10 that is fitted onto the two proximal end portions and is pressed against the inner tube 2j & the outer surface of the end portion and the inner surface of the spacer P1. A plurality of metal wires 3 connected to the P outer tube 1, inscribed in the inner surface of the inner tube 2, and arranged adjacent to each other in a substantially annular shape are arranged such that their base end portions each expand in the radial direction. It is in a bent state, and the proximal end portion of the inner tube 2 is
The metal wire 3 is deformed and expanded in diameter so as to surround each of the base end portions, and the gap space 5 provided between the inner surface of the outer tube 1 and the outer surface of the inner tube 2 is closed by the space closing packing 10. Since the structure is configured such that the inner tube 2 is greatly deformed only in the portion where the metal wire 3 is in contact with the inner tube 2, the base end of the metal wire 3 is
As a result, the metal wires 3 and the inner tube 2 are bonded to each other even more strongly. Moreover, space occlusion patch 1
0, mainly the deformed portion of the inner tube 2 is brought into pressure contact with the inner surface of the spacer P1, resulting in a lance pipe P whose proximal end opening portion of the gap space 5 is reliably closed with the space closing packing 10 which has been appropriately deformed. . Furthermore, the bond between the lance pipe P and the spacer P1 is strong and has high robustness.

[Brief explanation of the drawing]

The drawings illustrate the present invention; Fig. 1 is a partially omitted longitudinal sectional front view of the lance pipe before it is inserted into the spacer, and Fig. 2 shows the lance pipe in contact with the expansion protrusion of the receiver. Fig. 3 is a partially omitted vertical front view of the lance pipe with the metal wire, inner pipe, and space-occluding packing deformed by the expansion protrusion, and the spacer is fixed to the lance pipe. Fig. 4 is a longitudinal sectional front view with parts omitted; Fig. 4 is a longitudinal sectional side view of the spacer fixed to the lance pipe; Figs. 5 and 6 show other closing methods; Fig. 5 shows the spacer fixed to the lance pipe. A partially omitted longitudinal front view of the lance pipe when it is fitted externally, and Figure 6 shows the spacer fixed to the lance pipe with the metal wire, inner pipe, and space-occluding packing deformed by the expansion projections. It is a partially omitted vertical sectional front view. P... Lance pipe, Pl... Spacer... Outer pipe, 2... Inner pipe, 3... Metal wire, 5... Gap space, 10... Space closing packing, 20... - Receptor, 21...expansion protrusion. Patent application Hito Fire Lance Industry Co., Ltd.

Claims (1)

[Claims] 1. An inner tube is placed inside the outer tube so that an appropriate gap space is provided, and a plurality of metal wires are inscribed on the inner surface of the inner tube, and adjacent metal wires are circumscribed with each other to form a substantially annular shape. A lance pipe is formed by disposing the inner pipe and the proximal end portion of the metal wire slightly protruding from the proximal end portion of the outer pipe, and a space closing packing is externally fitted onto the proximal end portion of the inner pipe of the lance pipe. On the other hand, a spacer is formed which has the other end portion of a predetermined outer diameter that can be attached to the receiver and can be gripped by a lance pipe holder as appropriate, and the proximal end portion of the lance pipe is attached to one end of this spacer. Forcibly insert the metal wires of the lance pipe into contact with the inclined surface of the substantially conical expansion protrusion provided at the tip of the receiver, and gradually bend them so that they expand in the radial direction. At the same time as this metal wire is bent, the inner tube is deformed so as to expand its diameter by a plurality of metal wires, and the space closing packing is brought into pressure contact with the inner surface of the spacer, and the gap space between the inner surface of the outer tube and the outer surface of the inner tube is A method for closing a gap in a lance pipe, characterized in that the outer tube and the spacer are connected by appropriate coupling means such as welding or caulking. 2. An inner tube is placed inside the outer tube so that an appropriate gap space is provided, and a plurality of metal wires are inscribed in the inner surface of the inner tube, and adjacent metal wires are circumscribed to form a substantially annular shape. A lance pipe is formed by making the proximal end portion of the tube and the metal wire slightly protrude from the proximal end portion of the outer pipe, and a space closing packing is externally fitted onto the proximal end portion of the inner pipe of the lance pipe, and
A spacer with a predetermined outer diameter that can be gripped by a suitable lance pipe holder is fitted onto the proximal end of the lance pipe, and multiple metal wires of the lance pipe are expanded into a substantially conical shape provided at the tip of the receiver. At the same time, the proximal end of the lance pipe is forcefully pressed against the expansion projection, and the lance pipe is gradually bent to expand in the radial direction. is deformed so as to expand in diameter with a plurality of metal wires, and a space-closing packing is brought into pressure contact with the inner surface of the spacer, and the gap space between the inner surface of the outer tube and the outer surface of the inner tube is closed with the space-closing packing, and the outer tube is A method for closing a gap in a lance pipe, characterized in that the spacer and the lance pipe are connected by appropriate coupling means such as welding or caulking. 3. A lance pipe that is formed by arranging a plurality of metal wires in a substantially annular shape in an inner tube installed in an outer tube, and making the base end portions of the inner tube and metal wires slightly protrude from the base end portion of the outer tube. ,
A spacer of a predetermined outer diameter is fixed to the proximal end of the outer tube of the lance pipe, and a spacer of a predetermined outer diameter is fitted onto the proximal end of the inner tube of the lance pipe so that the outer surface of the proximal end of the inner tube and the inner surface of the spacer are connected to each other. The spacer is connected to the outer pipe of the lance pipe through an appropriate coupling means such as welding or caulking, and is inscribed in the inner surface of the inner pipe and arranged adjacent to each other in a substantially annular shape. The plurality of metal wires are bent so that their respective proximal ends expand in the radial direction, and the proximal end portion of the inner tube is deformed and expanded so as to surround each of the proximal ends of the metal wires. 1. A lance pipe characterized in that the lance pipe is configured such that the gap space provided between the inner surface of the outer tube and the outer surface of the inner tube is closed by a space-closing packing.