JP3133445B2 - Hydrogen gas discharge device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydrogen gas discharging device for discharging hydrogen gas generated inside a device such as an absorption refrigerator.

[0002]

2. Description of the Related Art For example, Japanese Utility Model Application Laid-Open No. 64-8174 discloses an absorption chiller / heater in which a hydrogen permeable device is connected to a gas storage chamber for storing non-condensable gas generated inside the absorption chiller / heater. The hydrogen permeable device is provided with a container into which the non-condensable gas flows from the gas storage chamber, a hydrogen discharge tube provided in the container to transmit and release the hydrogen in the non-condensable gas, and provided near the hydrogen discharge tube. And a heater for heating the hydrogen discharge tube.

[0003]

In the above-mentioned prior art, the joint between a vessel made of, for example, iron or stainless steel and a hydrogen discharge tube made of palladium or a palladium alloy is made of silver brazing or copper manganese. They were joined by a wax, and each of the waxes also entered the gap between the joints and served to maintain the airtightness of the container.
The wax that has entered the gaps is further oxidized by heating during use, and the wax becomes brittle. As a result, the hydrogen discharge tube itself cracks and falls off, making it impossible to maintain airtightness.
That is, there is a problem that the durability of the device is inferior. Further, the heat conduction during the brazing causes impurities to diffuse into and penetrate into the crystal grains of the hydrogen discharge tube, resulting in a decrease in the discharge capacity of the apparatus. In addition, a palladium alloy (A
Brazing of g-Pd) is extremely difficult, and it is almost impossible to use it for a conventional discharge device. Further, when the container is made of stainless steel, when the container is heated to, for example, about 400 ° C., it reacts with the impurity gas in the refrigerator and decomposes the gas to generate carbon monoxide or carbon dioxide, and finally the gas is generated. -Bones will be deposited. As a result, the hydrogen inlet side of the hydrogen discharge pipe dirty, there is a risk of losing function of discharging hydrogen gas. Further, even when the container is not made of stainless steel, there arises a problem that the surface of the hydrogen discharge tube on the hydrogen gas inlet side becomes dirty with the elapse of time and the ability to discharge hydrogen gas decreases.

[0004] It is an object of the present invention to improve the durability of a hydrogen gas discharging device, simplify inspection and cleaning operations, and maintain the hydrogen gas discharging capability.

[0005]

[0006]

The present invention solves the above-mentioned problems.
For this purpose, a service valve 5, a sleeve 6 connected to the service valve and having a threaded surface 7 and an inclined surface 8 formed on the inner surface of the opening, one end of which is flared, and the other end of which is flared. A hydrogen discharge tube 1 which is sealed and transmits hydrogen gas by heating; a heater 17 provided inside the hydrogen discharge tube 1; and a heater 17 which is supported at the center of the hydrogen discharge tube 1 and A heat exchanger in which a hydrogen gas passage 21 communicating with the outside is formed.
And a bushing 4 in which the heater guide 18 is inserted and a screwing surface 10 and an inclined surface 11 corresponding to the screwing surface 7 and the inclined surface 8 of the sleeve 6 are formed on the outer surface. A gas discharge device is provided to improve the discharge performance of hydrogen gas, improve durability, simplify inspection and cleaning work, and maintain discharge performance.

[0007]

The hydrogen discharge tube 1 can be easily attached to the service valve 5 by the flared portion at one end of the hydrogen discharge tube 1 and the airtightness of the attachment portion of the hydrogen discharge tube 1 can be improved. Since attachment can be performed without brazing with a braze or the like, the durability of the hydrogen discharge tube is improved, and the hydrogen discharge tube 1 can be used for a long period of time. Further, by removing the heater 17, the state of the surface of the hydrogen discharge pipe 1 on the side of the hydrogen gas inlet side can be confirmed and cleaned, and the inspection and cleaning work can be simplified and the discharge capacity can be maintained. It becomes possible.

Further, by closing the service valve attached to the non-condensing gas tank and removing the bushing 4, the hydrogen discharge pipe 1 can be removed to clean the outer surface.
It is possible to further simplify the cleaning operation and maintain the discharge capacity. Further, a heater 17 is supported at the center of the hydrogen discharge tube 1 by a heater guide 18, and the hydrogen discharge tube 1 at an equal distance from the heater 11 is uniformly heated by the heater 11 so as to uniformly heat the hydrogen discharge tube 1. The hydrogen permeation area increases, and the amount of discharged hydrogen gas can be increased.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. In FIG. 1, reference numeral 1 denotes a metal material that can transmit hydrogen gas, for example, palladium or a palladium alloy (2
(Containing 5% silver). A flare 2 is formed at one end of the hydrogen discharge tube 1 by flare processing. And the flare 2 is formed doubly. The other end of the hydrogen discharge tube 1 is, for example, a spatula restrictor and Ti
g The sealed end 3 is formed by welding.

Reference numeral 4 denotes a bushing which is a mounting tube for the hydrogen discharge pipe, and reference numeral 5 denotes a service valve provided with a sleeve 6 which is a discharge pipe. Are formed. The bushing 4 also has a threaded surface 10 and an inclined surface 1 corresponding to the threaded surface 7 and the inclined surface 8 of the sleeve 6.
1 are formed. Then, the flare 2 of the hydrogen discharge tube 1 is attached to the sleeve 6 with the copper packing P interposed between the bushing 4 and the inclined surfaces 11 and 8 of the sleeve 6.
Here, 12 is a shaft of the service valve 5, 13 is a valve attached to the tip of the shaft, 14 is a valve seat, and 15 is O
The service valve 5 is attached to, for example, a side wall of a non-condensable gas tank T that stores non-condensable gas such as hydrogen gas. The non-condensing gas tank T is, for example, a bleeding device (not shown) of an absorption refrigerator (not shown).
Is connected to the piping.

A heater 17 has a diameter smaller than the inner diameter of the hydrogen discharge tube 1. 18 is heater 1
7 is a heater guide serving as a support member, and a heater mounting opening 20 is formed in the center of the heater guide 18. As shown in FIG. 2, a plurality of passages 21 are formed on the outer surface of the heater guide 18. A heater fixing screw 22 is provided at one position in the passage 21.
The heater 17 is fixed to the heater guide 18 by the screw 22. The heater 17 is supported by a heater guide 18 and is located at the center of the hydrogen discharge tube 1. Reference numeral 24 denotes a lead wire of the heater 17, and the lead wire 24 is connected to an AC power supply (not shown).

For example, during operation of the absorption refrigerator, the heater 17
Is energized and generates heat. The hydrogen discharge tube 1 is heated from the inside by a heater 17 and has a temperature of, for example, 300 ° C. to 350 ° C.
° C. Therefore, the hydrogen gas flowing from the non-condensable gas tank T to the hydrogen discharge pipe 1 via the service valve 5 passes through the hydrogen discharge pipe 1 and is discharged to the outside. When the surface of the hydrogen discharge pipe 1 on the hydrogen inlet side is contaminated with the operation of the absorption refrigerator and the hydrogen gas discharge capability is reduced, or at a predetermined operation time of the absorption refrigerator, the service valve 5 is activated. Is closed, the bushing 4 is removed from the sleeve 6, the hydrogen discharge tube 1 is removed from the sleeve 6, and the surface is cleaned by washing or wiping. After that, the cleaned hydrogen discharge pipe 1 is inserted into the sleeve 6 and the bushing 4 is attached to the sleeve 6, thereby restoring the hydrogen gas discharging ability.

According to the above embodiment, the flare 2 and the sealing end 3
Since the flare 2 of the hydrogen discharge tube 1 provided with the above is fastened and attached to the sleeve 6 of the service valve 5 by the bushing 4, the airtightness of the mounting portion of the hydrogen discharge tube 1 can be improved. Without joining with silver braze etc.
The hydrogen discharge tube 1 can be easily attached. Further, since no brazing material or copper manganese brazing is used for attaching the hydrogen discharging tube, cracking and falling off of the hydrogen discharging tube 1 can be avoided, and the hydrogen discharging tube 1 can be used for a long period of time. Furthermore, since it is not necessary to use brazing, a pipe made of a palladium alloy having good durability can be used for the hydrogen discharge tube 1, and the hydrogen discharge tube 1 can be used for a longer time. Further, by forming the flare 2 twice, the strength is improved, and it is possible to avoid the occurrence of cracks in the flare 2 even when the flare 2 is tightened by the bushing 4. The airtightness of the mounting portion can be further improved. Furthermore, since the brazing is not used for mounting the hydrogen discharge tube 1, the mounting operation can be greatly simplified.

Further, since the surface of the hydrogen discharge tube 1 is the side surface of the inlet of the hydrogen gas, the inlet area of the hydrogen gas is increased as compared with the case where the inner surface of the hydrogen discharge tube 1 is on the inlet side of the hydrogen gas. And the ability to discharge hydrogen gas can be improved. When the hydrogen discharge pipe 1 is inspected, the service valve 5 is closed, the bushing 4 is removed, and the hydrogen discharge pipe 1 is taken out of the sleeve 6 to easily check the state, thereby simplifying the inspection work. be able to. In addition, the hydrogen discharge pipe 1 can be inspected by closing the service valve 5 regardless of the operation of the absorption refrigerator.

Furthermore, when the surface of the hydrogen discharge tube 1, that is, the surface on the hydrogen inlet side becomes dirty after a lapse of time, the surface can be easily cleaned by removing the hydrogen discharge tube 1, thereby discharging hydrogen gas. It is possible to recover the capacity and maintain the discharge capacity for a long period of time and to simplify the cleaning work. In the above embodiment, the hydrogen discharge pipe 1 is attached to the non-condensable gas tank T via the service valve 5, but the non-condensable gas tank T is provided with a mounting portion for the bushing 4, and the hydrogen discharge pipe 1 is directly attached to the non-condensable gas tank T. May be. Further, the sealing end 3 of the hydrogen discharge tube 1 may be processed by, for example, press molding.

[0016]

According to the present invention, there is provided a hydrogen gas discharging apparatus constructed as described above, comprising: a hydrogen discharge pipe having one end flared and the other end sealed; and a heater provided inside the hydrogen discharge pipe. Because it is equipped, the hydrogen discharge pipe can be easily attached to the non-condensable gas tank etc. using the flare processing part,
In addition, since no brazing or the like is used, cracking or falling off of the hydrogen discharge tube can be avoided, the hydrogen discharge tube can be used for a long period of time, and installation work can be greatly simplified. it can.

Further, the hydrogen gas inlet area can be increased, the hydrogen gas discharge capacity can be improved, and the surface of the hydrogen discharge tube on the hydrogen inlet side is the surface of the hydrogen discharge tube. Even when the hydrogen inlet side surface becomes dirty, the cleaning operation can be easily performed, and the discharge capability of the hydrogen gas can be maintained for a long period of time. Further, the hydrogen discharge pipe can be easily attached to and detached from the discharge cylinder connected to the service valve by using the hydrogen discharge pipe mounting cylinder by using the screwing surface and the inclined surface. As a result, the service valve is closed and the absorption valve is closed. Inspection and cleaning of the hydrogen discharge tube can be easily performed even during operation of the refrigerator.

The heater guide supports the heater at the center of the hydrogen discharge tube, and the heater controls the hydrogen discharge tube.
It is possible to uniformly heat, heat - via a passage formed in Tagaido can release hydrogen in hydrogen release pipe to the outside, and the this <br/> to further improve the discharge capacity of the hydrogen gas it can.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a hydrogen gas discharge device.

FIG. 2 is a plan sectional view taken along the line AA of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hydrogen discharge pipe 2 Flare 3 Sealing end 4 Bushing 5 Service valve 6 Sleeve 7 Screw surface 8 Inclined surface 10 Screwed surface 11 Inclined surface 17 Heater 18 Heater guide 21 Passage

Claims (1)

(57) [Claims] 1. A hydrogen discharge tube is heated by a heater,
In a hydrogen gas discharge device that permeates hydrogen gas and discharges it to the outside, a service valve and a connection to the service valve are provided.
With a screwed surface and an inclined surface formed on the inner surface of the opening
Tube and one end is flared and inserted into this discharge tube
The other end is sealed.
The outlet pipe, the heater housed in the hydrogen discharge pipe, and the heater
-Support the center of the hydrogen discharge tube and
A heater guide having a passage communicating with the heater;
The guide is inserted into the outer surface on the screwing surface and the inclined surface of the discharge cylinder.
Hydrogen release pipe with corresponding screwing and inclined surfaces
A hydrogen gas discharge device comprising: an attached cylinder .