JPS596332B2 - oxygen lance device - Google Patents

Description

[Detailed Description of the Invention] The present invention is used for drilling, cutting, and dismantling buildings made of reinforced concrete and other structures, rocks, reinforcing bars, refractories, underwater structures, reefs, etc. The present invention relates to an oxygen lance device.

Conventionally, various oxygen lance devices have been provided → In order to efficiently and reliably blow out high-pressure oxygen gas supplied from an oxygen container etc. from the lance tube, it is necessary to combine the lance tube and the oxygen supply device. It is necessary to interpose a backing, a spacer, etc. at the connection part, and also to attach an on-off valve to adjust the flow rate of oxygen gas, making the structure quite complicated.

In addition, the connection between the lance tube and the gas supply nozzle must be airtight, but the abutting portions of the lance tube and the gas supply nozzle, which are removably formed, must be closely connected. This is a major drawback, as it causes a reduction in the pressure of oxygen gas and a decrease in the amount of oxygen gas ejected.

There are still many configurations in which the lance tube is attached to the holding tube by inserting it into the holding tube, and excessive insertion or contact with the workpiece may push the lance tube toward the gas supply nozzle. There is also a risk that the part that comes into contact with the gas supply nozzle may be damaged due to movement.

Furthermore, in recent years, a high-pressure pipe that spews out high-pressure oxygen gas and a branch flow path that branches off from the lance and has an appropriate opening/closing valve and jets out a low-medium-pressure gas flow from the tip of the lance pipe have been developed. Although there are some methods to efficiently perform drilling, cutting, etc. using these high-pressure, low-medium-pressure double jets, the branch structure still leaves much room for improvement.

The present invention was devised in view of the above-mentioned problem, and its purpose is to connect the rim of a lance tube to the rim of a nozzle that spouts oxygen gas, so that the through holes thereof communicate with each other. In addition to increasing supply efficiency, the nozzle is equipped with a buffer to absorb pressure on the nozzle due to attachment of the lance tube or contact with the workpiece, thereby preventing damage to each part. However, the object of the present invention is to provide an oxygen lance device that has a simple structure, is easy to handle, and has excellent workability.

In other words, the gist is an oxygen lance device having a substantially cylindrical holding tube to which oxygen gas is supplied from a supply port at the base end, and to which the proximal end of the lance tube body is detachably attached through a holding port at the tip. In this step, the proximal edge of the lance tube body is brought into close contact with the through hole edge of the nozzle installed in the holding tube so that the through hole of the lance tube body and the nozzle are in communication with each other, and The present invention consists in that the nozzle is brought into close contact with the internal buffer body, and that the through hole of the nozzle is formed so as to communicate with the supply port through the through hole of the buffer body.

Hereinafter, one embodiment of the present invention will be described in detail according to the drawings.

A lance tube body 1 having a double tube structure has an outer tube 2 made of iron or an iron alloy, and a small-diameter tube loaded inside the outer tube 2 with a small gap between it and the wall of the outer tube 2. It consists of an inner tube 3 and a metal wire 4, such as a combustion iron wire, which is appropriately placed between the two tubes 2 and 3.

On the other hand, oxygen container 5. There is an oxygen supply device 8 consisting of a pressure regulator 6, a hose 7, etc.

There is a regulating pipe 10 which has screw threads on the outer circumferential surface of both ends and is provided with an on-off valve 9 such as a needle valve or a cock on its axial center, and the tail end 11 is connected to the hose via a pipe joint 12. 7 are connected.

The on-off valve 9 is connected to the outside of the control pipe 10 and has a spring 1.
A movable connecting rod 14 that passes through 3 is attached.

The distal end of the connecting rod 14 is fixed to approximately the center in the longitudinal direction of a lever 15 which is pivotally supported near the tail end 11 of the adjustment tube 100, and when the lever 15 is operated, it resists the elastic force of the spring 13. Then, the connecting rod 14 moves up and down, and the on-off valve 9 is opened.

The holding tube 16, which has the adjustment tube 10 threadedly connected to its base end and has a holding port 17 at its distal end, has a thread on the outer circumferential surface of its distal end, so that a detachable tube 25, which will be described later, can be screwed onto the distal end.

A buffer body 18 such as a rubber cushion is loaded inside the base end of the holding tube 160, and its through hole 19 communicates with the supply port 20 of the regulating tube 10.

There is a substantially hat-shaped nozzle 21 that is housed inside the holding tube 16 in contact with the buffer body 18 .

The converging tip of the nozzle 21 faces the tip of the holding tube 16, and the through hole 22 passing through the center is connected to the through hole 19 of the buffer body 18.
and communicates with the supply port 20.

A portion of the regulating pipe 10 from the tail end 11 to the on-off valve 9;
There is a branch flow path 23 that connects the vicinity of the tip of the nozzle 21 in the holding tube 16 and branches the supplied oxygen gas to supply it to the tip of the nozzle 21 .

A pressure reducing valve 24 is interposed at an appropriate position in the branch flow path 23, and is opened and closed by appropriate means such as a bundle or a lever.

That is, the oxygen gas flowing in the regulating pipe 10 is kept at high pressure, and the oxygen gas flowing in the branch flow path 23 is adjusted to low or intermediate pressure by the pressure reducing valve 24, thereby creating a double jet flow of high pressure and low intermediate pressure oxygen gas. This is what we get.

In the illustrated example, the starting end of the branch flow path 23 is selected near the tail end 11 of the regulating tube 10, but the invention is not limited to this, and the intake port for low and medium pressure oxygen gas may be formed separately and independently. Of course you can.

The detachable tube 25 is detachably connected to the tip of the holding tube 16.
It has a screw thread inside, a spacer 26, a rubber ring 2
7, etc., as appropriate, and an insertion hole 28 into which the lance tube 1 can be inserted is bored at the tip.

By externally fitting and screwing the detachable tube 25 formed as described above onto the tip of the holding tube 16 and moving it forward and backward with respect to the holding tube 16, the tip end surface of the holding tube 16 is attached to the rubber ring 27 through the spacer 26. The rubber ring 27 itself bulges toward its cylindrical center, presses the outer peripheral surface of the lance tube 1, and fixes the lance tube 1.

Further, on the outer circumferential surface of the detachable tube 25, there is provided a hole for easy attachment and detachment using fingers.

Anti-slip knurling 29 is engraved.

To attach the lance tube 1, first, the detachable tube 25 is screwed to the tip of the holding tube 16, and then the lance tube 1 is inserted through the insertion hole 28 of the detachable tube 25 into the holding port 17 of the holding tube 16. Insert it into .

Therefore, it is desirable that the diameter of the holding port 17 be equal to the outer diameter of the lance tube 1.

Still, the inner diameter of the inner tube 3 constituting the lance tube body 1 is
It is formed to be slightly larger than the outer diameter of the tip of the nozzle 21 so as to surround the tip of the nozzle.

The edge of the end of the lance tube 1 that enters the inside of the holding tube 16 by inserting itself or by screwing the detachable tube 25,
Although it closely contacts and presses the tip of the nozzle 21, the pressure of the lance tube 1 is buffered and absorbed by the buffer body 18 placed in contact with the proximal end of the nozzle 21.

The gap in the lance tube body 1 in which the metal wire 4 is disposed is as follows:
The peripheral surface of the tip of the nozzle 21 communicates with the branch flow path 23, and the low-medium pressure oxygen gas is ejected to the outside through the gap in the lance tube 1.

On the other hand, the inner tube 3 communicates with the through hole 22 of one nozzle 21, the through hole 19 of the buffer body 18, and the supply port 20.
, the buffer body 18 and the adjustment tube 10 are closely connected to each other.

To explain this use, first, the lever 15 is released and the on-off valve 9 is closed, while the pressure reducing valve 24 is adjusted to allow oxygen gas whose pressure has been reduced to approximately 1/2 to flow into the branch flow path 23. The metal wires 4 are made to flow through each other to ignite the tip of the lance tube 1 to form a crater.

Thereafter, the crater is applied to the workpiece to heat it, and after the start of melting of the workpiece, the lever 15 is pushed to open the on-off valve 9 and high pressure oxygen gas is spouted from the tip of the inner pipe 3.

In this way, at the crater, low-medium pressure oxygen gas is ejected around high-pressure oxygen gas to form a double gas jet, focusing combustion energy in a beam shape and preventing oxygen gas diffusion. It efficiently performs drilling, cutting, etc. of the workpiece.

Therefore, according to the present invention, the nozzle 21 and the buffer body 18 that is in close contact with the nozzle 21 are housed in the holding tube 16, and the lance when the lance tube body 1 is attached or comes into contact with the workpiece. Against contact between the base end edge of the lance tube 1 and the tip of the nozzle 21, or suppression of the nozzle 21 due to entry of the lance tube 1, etc.
Since the nozzle 21 moves using the buffer body 18 as a cushion and absorbs the pressing force, damage to the tip of the nozzle 21 and the contact portion of the lance tube 10 can be prevented, which is extremely effective.

In addition to this, the proximal edge of the lance tube 1 that moves back and forth within the holding tube 16 during installation is constantly pressed and closed by the tip of the nozzle 21 that is pressed by the buffer 18. Airtightness is ensured, there is no risk of oxygen gas leaking, and the supply efficiency is extremely high.

Furthermore, as described in the embodiment, the nozzle 21 that is in close contact with the proximal edge of the inner tube 3 reliably guides the low-medium pressure oxygen gas flowing in the branch flow path 23 toward the metal wire 4. Since it serves as a guide wall, the optimal pressure value can be obtained near the crater without impairing the appropriate value operated and set by the pressure reducing valve 24.

In addition, by forming a double jet of high pressure and low and medium pressure, and adjusting the gas jet as appropriate depending on the type of workpiece and the construction state by operating the lever 15 etc., energy can be focused. and its control etc. are also flexible.

Further, as shown in the illustrated example, by making the detachable tube 25 detachable, the lance tube body 1 can be easily repaired, replaced, etc., and is suitable for transportation, packaging, etc., and is extremely convenient.

As described above, the present invention provides a shock absorber connected to the nozzle to protect each part by absorbing the shock when installing the lance tube or during use, and to protect the connecting parts of each member. In addition to preventing leakage of oxygen gas by bringing them into close contact with each other and increasing supply efficiency, the structure is simple and easy to handle, and it can be expected to improve work efficiency.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is an overall view, and FIG. 2 is a sectional view of a main part. 1...Lance tube body, 2...Outer tube, 3...Inner tube,
4... Metal wire, 5... Oxygen container, 6... Pressure regulator, 7... Hose, 8... Oxygen supply device, 9...
Opening/closing valve, 10... Regulating pipe, 11... Tail end, 12.
...Pipe joint, 13...Spring, 14...Connection rod,
15... Lever, 16... Holding tube, 17... Protective port, 18... Buffer, 19... Through hole, 20... Supply port, 21... Nozzle, 22... Through hole, 23... Branch flow path, 24... Pressure reducing valve, 25... Detachable pipe, 26...
...Spacer, 27...Rubber ring, 28...Insertion hole, 29...Knurling.

Claims (1)

[Scope of Claims] 1. An oxygen lance having a substantially cylindrical holding tube to which oxygen gas is supplied from a supply port at the base end and to which the proximal end of the lance tube body is detachably attached to the holding port at the distal end. In the device,
The base end edge of the lance tube body is brought into close contact with the through hole edge of the nozzle housed in the holding tube so that the through hole of the lance tube body and the nozzle communicate with each other, and the buffer body housed in the holding tube An oxygen lance device characterized in that a nozzle is brought into close contact with a buffer body, and a through hole of the nozzle is formed to communicate with the supply port through a through hole of a buffer body. 2 The lance tube body is composed of an inner tube, an outer tube with the inner tube inside, and an appropriate number of metal wires arranged in the gap between the inner tube and the outer tube, and the proximal rim of the inner tube communicates with the supply port of the holding tube through the nozzle and the through hole of the buffer body, and the gap between the outer tube and the inner tube is connected to a branch flow path configured to branch off a part of the supplied oxygen gas. 2. The oxygen lance device according to claim 1, which communicates with each other and has a valve body interposed in the branch flow path.