JPS594363B2 - Oxygen generator using a cartridge that releases oxygen - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an oxygen generating device using a cartridge for discharging oxygen, particularly for welding, fusing and soldering operations.

Such devices are also called reactors.

In known oxygen generators of this type, a gas-tight container surrounds the cartridge holder without forming any special intermediate chambers.

The cartridge holder is fitted with at least one commercially available cartridge for releasing oxygen, which cartridge is provided at one end with an igniter that can be rubbed against the friction surface of the matchbox for ignition.

The cartridge holder has, at the end located outside the container, a filter for dust-like by-products during the combustion process and a chamber for accommodating a desiccant agent for absorbing water vapor generated during combustion. There is.

This chamber for the desiccant is guided to a connection for the hose, which is then guided to a torch for welding, fusing and soldering operations.

This type of oxygen generator uses combustible gases such as
Used in conjunction with containers containing butane or butane.

The combustible gas container is equipped with a control valve leading to another hose which is also connected to the torch.

Such units are especially used for hobby work.

In the known device, the oxygen released into the container flows through the filter and the desiccant to the torch nozzle without creating a significant overpressure.

It is not possible to control the oxygen flow by mechanisms provided in the device itself.

The amount of oxygen consumed is determined exclusively by the combustion conditions of the cartridge, and for this reason various types of cartridges have been proposed.

The oxygen evolution process can only be terminated by withdrawing the cartridge holder from the container and separating the burning part of the cartridge, for example by cutting.

The unburned part of the cartridge can still be used by igniting it anew, but this ignition process is difficult since the remaining part of the cartridge no longer contains ignition agent.

The cartridge is therefore usually left to burn to the end, resulting in a fourth wasted cartridge if the process is terminated prematurely.

Control of the torch flame is only possible by changing the valving in the butane or butane container.

In known devices, the gas-tight container is heated due to its close proximity to the car-IJ joint holder or to the burning cartridge, so that it is not necessary, for example, to carry out expensive electrodeposition to obtain a heat-resistant surface shield of the container. There is.

However, discoloration of the surface shield or swelling of the coating material is still unavoidable.

Due to the high temperature in the container, the released oxygen also flows very hot through the filter and desiccant, taking with it moisture and heat.

For example, if the cartridge has not been stored properly, a significant amount of moisture absorbed by the cartridge may
Due to the high gas temperature, it is carried up to the torch without condensing.

This can cause the torch flame to occasionally go out, making the torch inconvenient to use.

The heat produced by oxygen also significantly reduces the useful life of the hose.

Since the torch nozzle of the known device has a special design due to the low gas pressure and no control of the oxygen flow, it must be selected to suit the particular cartridge dimensions or its characteristics.

Therefore, when the known device is used industrially, for example in small factories or construction sites, it is inconvenient.

Therefore, heavy and large high-pressure oxygen containers with an internal pressure of up to 200 gauge pressure are usually used at construction sites.
However, this container is expensive to purchase and difficult to transport.

Therefore, transport using ladders and transport on scaffolding is practically not carried out.

SUMMARY OF THE INVENTION It is therefore an object of the invention to improve an oxygen generator of the type mentioned at the outset so that it can be used in at least one, preferably several, cars.
To provide an oxygen generator capable of releasing the oxygen content of IJ Tsuji without interrupting the combustion process, storing the released oxygen under pressure for a long time, and taking it out at as constant a pressure as possible.

The configuration of the present invention that solves this problem is an oxygen generating device, especially for welding, fusing, and brazing work, using an oxygen-emitting cartridge, which includes a pressure-resistant container and a storage chamber inside the pressure-resistant container. and a cartridge holder inserted from the upper end of the pressure container, the upper end of the cartridge holder is hermetically coupled to the pressure container, and the cartridge holder has an upper closure at least at the point where it joins the pressure container. In the case of a type in which a valve for measuring oxygen is attached to the pipe, (a)
(b) the upper closed pipe is provided with a chamber provided with a filter; (c) this chamber is directly connected to the pressure reducing valve; The pressure reducing valve is connected to a connection for removing oxygen.

The size of the storage chamber or its storage volume depends on the amount of oxygen released by one cartridge or, if multiple cartridges are loaded, the amount of oxygen released by all cartridges, as well as the permissible operating pressure of the container. If it is known, it can be easily defined based on known regular relations.

In the designed pressure vessel, the used cartridge or cartridges can be completely burnt out without the need for continuous use of oxygen.

Rather, oxygen is stored in the storage chamber at constantly increasing pressure until the final pressure is reached.

Of course, it is possible to extract oxygen even during combustion of the cartridge.

The oxygen generator according to the invention has the following advantages.

The oxygen release process from the cartridge and the oxygen consumption process in the torch are no longer forced to be related to each other.

In other words, both processes can be performed independently of each other.

Interruptions in the welding, brazing or fusing process do not force a significant interruption in the combustion of the cartridge.

Therefore, it is not necessary to cut out the burning cartridge part and reignite the unburnt part.

Furthermore, since control of the oxygen flow is possible by means of a pressure reducing valve, there is no need to stock various cartridges.

This also makes it possible to control the oxygen pressure, so that the torch flame can be adapted to the working conditions, for example when cutting.

Due to the provision of the storage chamber, the distance between the container wall and the cartridge holder or the burning cartridge is considerably large, so that the container is hardly heated up.

A danger to the surroundings is therefore eliminated and a relatively inexpensive surface shield is obtained, for example by simple painting.

The released oxygen can be cooled sufficiently so that only little heat of combustion is entrained and moisture is absorbed by the desiccant.

The functionality of the torch is thus improved.

In other words, the flame will not be extinguished by moisture.

Due to the stored oxygen amount, the oxygen generating device is always ready for work, and the oxygen storage amount can be determined exclusively by the selection of the container dimensions and the number of cartridges to be inserted.

Typically, vessel dimensions are selected such that the final oxygen pressure is about 20-50 gauge pressure.

At such pressures, thin-walled vessels can still be used which are relatively small and therefore significantly lighter compared to high-pressure vessels.

Therefore, it is easy to carry it onto the scaffold and transport it on the scaffold.

In contrast to high-pressure vessels, the oxygen generator according to the invention can always be replaced with a new cartridge at any location and put back into operation.

If oxygen is required immediately and in large quantities, a cartridge or a stack of cartridges can be ignited at both ends and inserted into the container.

The water oxygen generator can use a torch of conventional construction designed for working pressures up to about 2.5 gauge pressure by being equipped with a conventional pressure reducing valve.

Any combustible gas e.g. acetylene, for the formation of a flame
Propane and hydrogen, etc. can be used.

As mentioned above, the device is lightweight and, in conjunction with the ability to load a large number of cartridges, compact, and therefore can be transported over long distances in buses, airplanes, ships and ambulances.

This is particularly advantageous in remote areas, such as mountainous areas, remote farms or space travel.

The ratio between the delivered oxygen and the weight of the equipped container is optimal.

The need to transport and manage empty containers for new filling can be completely eliminated.

Furthermore, there is no need to store fully or partially filled containers for infrequently occurring use cases, and there is no need to pay for this storage.

There is no need to keep a stock of spare containers in case the first container is used up.

According to an advantageous embodiment of the invention, the oxygen generator is designed in such a way that the pressure vessel has approximately the same length as the cartridge holder and at least twice its diameter.

In the storage chamber formed in this way, an adequate amount of oxygen can be collected even if the internal pressure of the container is not too high.

It is advantageous if the pressure-tight container concentrically surrounds the cartridge holder with a radial spacing, such that the spacing is at least equal to the diameter of the cartridge holder, so as to produce as uniform a temperature distribution as possible on the circumference of the container. .

In this case, it is advantageous if the cartridge holder is inserted into the pressure-tight container via a pressure-tight thread, which provides a high sealing effect and also allows rapid replacement.

In order to better control the operating conditions and obtain a constant gas pressure, it is advantageous to have a manometer for indicating the internal pressure of the pressure vessel, a pressure reduction device and a manometer for indicating the working pressure.

Since the cartridge releases aggressive components when burned, the pressure container is made of corrosion-resistant steel or the inside of the container is coated with a heat-resistant material such as enamel or polytetrafluoroethylene. is particularly advantageous.

Plastics are preferred because of their high impact resistance, and the selection of heat- and corrosion-resistant plastics for surface coatings is relatively wide in this case.

The oxygen generator according to the invention is also suitable as a reactor for filling storage vessels or large vessels.

In contrast to previously known devices, the oxygen generating device according to the invention consists of a pressure-tight container, so that the released oxygen can be transferred to another container with a certain pressure difference and a pressure can be built up in this container. .

In that case, it is only necessary to equip the oxygen generator with a suitable number of cartridges and to connect it to the storage container via a suitable connecting line.

In this case too, the pressure vessel can accommodate at least one cartridge of released oxygen while maintaining the permissible vessel pressure.

If the pressure in the storage container reaches a predetermined pressure within a short period of time before all the cartridges in the oxygen generator are completely burned out, a pre-installed safety valve will act to prevent excess pressure. of oxygen can be released into the atmosphere.

According to a particularly advantageous embodiment, this oxygen generator is used as a reactor for continuously producing large amounts of oxygen.

For this purpose, at least one charging gate is provided, through which a new cartridge can be introduced into the pressure-tight container without opening it and without reducing the oxygen pressure.

According to another embodiment, at least one magazine for storing a number of cartridges is arranged inside the container;
If these cartridges are brought to the ignition position one after another, long-term operation is possible.

The invention will now be explained with reference to the illustrated embodiment.

In the drawing, reference numeral 10 designates a gas-tight container, such containers being known, for example, from liquefied gas containers or fire extinguishers.

The container 10 has a substantially cylindrical shape, and has a head with a pressure-resistant threaded portion 11 at its upper end, which allows the upper end of the cartridge holder 12 to be attached to the container 10.
and are airtightly connected.

Since such a pressure-resistant threaded portion is already known, a description thereof will be omitted.

The cartridge holder 12 has an approximately tubular shape and consists of a tube segment 13 to which curved portions 14 are fixed at a distance from each other, which curves together with the tube segment form a circular shape. forming a ring.

The lower end of the cartridge holder 12 is closed by a base 15, which is welded to the tube segment 13 as well as to the lower bend 14a.

The upper end of the cartridge holder 12 consists of a closed tube 16 into which a filter 17 is inserted, which is made of a plug-shaped heat-resistant fiber material (glass fiber, asbestos fiber, etc.). It is made of slag cotton.

A chamber 18 is thereby formed in the tube 16, into which a granular desiccant agent, for example silica gel, is inserted.

A plurality of cartridges 19 are contained in the cartridge holder 12.
are inserted, and these cartridges are made of heat-generating material that generates oxygen upon combustion.

The lowest cartridge 19a is shown in the firing state after being lit at the bottom end, with the glowing area 19b moving upwards.

Gaseous oxygen is generated in the region of this red-hot zone, which is indicated by gas stream 20.

Because the curved portions 14 or 14a have a relatively large intermediate space between each other, oxygen can flow out of the cartridge holder 12 unimpeded and the storage concentrically surrounding the cartridge holder 12. They are gathered in room 21.

As is clear from the drawings, the cartridge holder has approximately the same length as the airtight container 10.

In this case, the radial distance II S +1 is approximately equal to the diameter of the cartridge holder 12.

The curved portion 14 or 14a prevents the cartridge from falling from the cartridge holder 12.

A manometer 22 for displaying internal pressure, a pressure reducing valve 23, a manometer 26 for displaying working pressure, and a safety valve 27 are provided at the upper end of the cartridge holder 12.

The oxygen hose connection is designated 24.

The oxygen outflow pressure can be adjusted within the limits normally used by the regulating bundle 25.

The oxygen released within the red-hot area 19b is transferred to the connection 2
4, it flows through the outer surface of the filter 17 into the chamber 18 containing the desiccant and from there into the pressure reducing valve 23.

Dust generated during the combustion process adheres to the surface of the filter 1T and is removed from the filter by brushing or knocking out when the cartridge holder 12 is newly inserted.

Furthermore, this oxygen generator is provided with a carrying handle 28.

[Brief explanation of drawings]

The drawing is a partial cross-sectional view showing an oxygen generator according to an embodiment of the present invention. 10...Container, 11...Threaded portion, 12
... Cartridge holder, 13 ... Tube segment, 14° 14a ... Curved portion, 15.
...Bottom, 16...Pipe, 17...
- Filter, 18... Chamber, 19... Cartridge, 19a... Burning cartridge, 19b... Red-hot area, 20... Gas flow, 21...Storage chamber, 22...Manometer, 23...Reducing valve, 24...Connection, 25...Adjustment Bundle, 26...
Manometer, 27...Safety valve, 28...
- Handle for transportation.

Claims (1)

[Claims] 1. An oxygen generating device, in particular for welding, fusing and brazing operations, using an oxygen-emitting cartridge, comprising:
It is equipped with a pressure-resistant container and a cartridge holder inserted from the upper end of the pressure-resistant container leaving a storage chamber in the pressure-resistant container. - In a type in which the IJ joint holder consists of an upper closed pipe at least at the point where it is connected to the pressure vessel, and a valve for oxygen metering is attached to this pipe, (a) said valve is (b) a chamber 18 equipped with a filter 17 is provided in the upper closed pipe 16; (c) this chamber 18 is directly connected to the pressure reducing valve 23; and (b) An oxygen generating device using a cartridge for releasing oxygen, characterized in that the pressure reducing valve 23 is connected to a connection for taking out oxygen.