JP4693824B2 - Water-type backfire prevention device installed in the combustion gas supply channel - Google Patents

Description

  The present invention is a water-type backfire prevention device installed in a combustion gas supply channel, particularly a combustion gas supply channel using a mixed gas of hydrogen and oxygen obtained by utilizing electrolysis or the like as a combustion gas. The present invention relates to an improved water-type backfire prevention device that reliably suppresses backfire conducted from a combustion device through a supply path to a combustion gas generation device.

  The system used for various operations by sending hydrogen gas or hydrocarbon combustion gas from combustion gas source to the combustion device is applied to a wide range of fields, for example, gas welding machine, snow melting device, greenhouse warming, aquaculture facility It is also used as an in-vehicle power source for temperature management or transportation means.

  As such a combustion gas source, various apparatuses have been used in recent years. For example, the present inventor has proposed a new combustion gas generation apparatus utilizing electrolysis as Japanese Patent Application No. 2006-187245.

  However, often a problem in such devices is how to quench the flashback when a flashback occurs in the conduit from the combustion gas source to the combustion device.

  For example, when a flashback phenomenon occurs in a combustion device, the ignition of the combustion device may reach the combustion gas source through the conduit, and a device that reliably prevents such flashback has been obtained in the past. It was not done.

  As a conventional backfire prevention valve, for example, Patent Document 1 discloses a pressure valve incorporated in a pressure line of a self-ignition internal combustion engine.

Special table 2006-507446 public information

  However, in this type of conventional pressure valve, the main purpose is to release high pressure to the outside by a change in pressure, which is not sufficient for preventing flashback.

The present invention, in order to solve the above-tightly closed, empty chamber body is connected to the air chamber member, a supply path for supplying combustion gas from a combustion gas source to Check body, Check A closed water chamber body that is connected to the body by a connection pipe and is filled with water, and a delivery pipe that feeds combustion gas from the water chamber body, one end of the connection pipe being the bottom of the water chamber body It is extended so that the other end is connected to the side wall of the vacant body, and the middle part between the one end and the other end is positioned higher than the water surface of the water chamber body. It is arranged to extend to the bottom of the body .

  FIG. 1 shows a preferred first embodiment of a water-type backfire prevention device according to the present invention.

  The water-type backfire prevention device includes an empty chamber body 12 and a water chamber body 14 disposed on the substrate 10, and these devices are installed in a combustion gas supply path.

  The vacant body 12 is made of a pressure-resistant sealed cylinder such as stainless steel, and the combustion gas is fed into the receiving port 12a from a combustion gas source through a supply path (not shown) as indicated by an arrow.

  On the other hand, the water chamber body 14 is made of a pressure-resistant sealed cylinder such as stainless steel, and a pressure relief port 16 is provided on the upper portion thereof. When the pressure inside the water chamber body 14 rises abnormally, the pressure relief port 16 High pressure can be released to the atmosphere.

  A combustion gas delivery pipe 18 is connected to the upper side surface of the water chamber body 14, and the combustion gas that has passed through the empty chamber body 12 and the water chamber body 14 is sent out from the delivery pipe 18 to a combustion device (not shown). It is.

  A connecting pipe 20 is provided to connect the aforementioned vacant body 12 and the water chamber body 14, and one end 20 a of this connecting pipe 20 passes through the side surface of the vacant body 12 as is apparent from FIG. 1. The lever is extended to the vicinity of the bottom of the empty body 12. Further, the other end 20 b of the connecting pipe 20 extends through the side surface of the water chamber body 14 in the vicinity of the bottom of the water chamber body 14 as illustrated.

  A characteristic of the present invention is that the interior of the water chamber body 14 is filled with water as shown in the figure. In the embodiment, the water surface 22a extends to the inside of the water chamber body 14. It is filled to a height that allows 20 to be sufficiently submerged in water. Although the filling port for filling the water chamber body 14 with water 22 from the outside is not shown, it is provided at the upper part of the side surface of the water chamber body 14, and this filling port can be opened and closed by a valve.

  The pressure relief port 16 described above includes an upper opening 14a of the water chamber body 14 and a stop ring 24 fixed to the upper opening 14a, and a thin film made of a metal thin plate or a plastic thin plate that closes the upper opening 14a with the stop ring 24. 26 is fixed, and when an internal pressure exceeding a certain level is applied, the thin film 26 is broken, and the pressure in the water chamber body 14 is released to the atmosphere.

  1st Embodiment of this invention consists of the above structure, The effect | action is demonstrated below.

  In a normal combustion state, the combustion gas supplied from the combustion gas source is first guided into the empty chamber body 12 and sequentially sent from one end 20 a of the connecting pipe 20 to the bottom of the water chamber body 14. Combustion gas blown out from the other end 20 b of the connecting pipe 20 passes through the water 22 and is led from the delivery pipe 18 to the combustion device.

  When a backfire occurs between the delivery pipe 18 and the combustion apparatus for some reason, the backfire first reaches the water chamber body 14 and increases the pressure in the water chamber body 14. Since the pressure relief port 16 is set to have a sufficiently large relief pressure, the thin film 26 does not break, and the pressure due to the backfire in the water chamber body 14 pushes down the water 22 in the water chamber body 14. As a result, the water 22 flows into the vacant body 12 through the connecting pipe 20.

  As is apparent from the figure, the inner volumes of the empty chamber body 12 and the water chamber body 14 in the first embodiment are sufficiently larger than the former, and the water 22 is also filled in the water chamber body 14. The amount is filled more than the internal volume of the vacant body 12. Therefore, even if the pressure in the water chamber body 14 increases due to flashback and the water 22 moves to the empty chamber body 12 as described above, if the empty chamber body 12 is filled with the water 22, the water chamber body 14 And the water 22 in the vacant body 12 cuts off the path to the combustion gas source, and the fire is reliably extinguished.

  Of course, when the pressure in the water chamber body 14 instantaneously increases due to the backfire, the thin film 26 of the pressure relief port 16 described above is destroyed, and this backfire pressure is surely released to the outside. it can.

  As described above, at the time of normal combustion gas supply, the vacant body 12 hardly acts as a resistance against the combustion gas and acts as a mere passage region. It itself is filled with the return of the water 22 from the water chamber body 14 and acts as a water shielding chamber against backfire. By such a double shielding chamber of the air chamber body 12 and the water chamber body 14, It is possible to perform a quick fire suppression by reliably blocking the backfire from reaching the combustion gas source.

  FIG. 2 shows a second preferred embodiment of the water-type flashback prevention device according to the present invention. The same or corresponding members as those in the embodiment of FIG.

  What is characteristic in the second embodiment is that a gas-liquid separation chamber is provided in the water chamber body 14, thereby separating the liquid component from the combustion gas that has become highly humid through the water 22. And can be sent to the supply path.

  The first gas-liquid separation chamber 30 is provided in the upper part of the water chamber body 14, and a plurality of baffle plates 32 are provided in the gas-liquid separation chamber 30. Each baffle plate 32 is made of a substantially disk-shaped thin plate, and its outer periphery is fixed to the inner wall of the gas-liquid separation chamber 30, but a part of the baffle plate 32 a is bent downward and is connected to the inner wall of the gas-liquid separation chamber 30. A gap is provided between them, and the combustion gas sequentially rises toward the conduit 34 from this gap. Usually, the temperature of the combustion gas is about 65 ° C., while the gas-liquid separation chamber 30 is kept at substantially normal temperature, so the high-humidity combustion gas is cooled by the baffle plate 65 and the liquid is separated from the combustion gas. Is done.

  In the second embodiment, a second gas-liquid separation chamber 40 is further provided outside the water chamber body 14. The second gas-liquid separation chamber 40 has a double cylindrical shape and is closed at the top. A thin extraction tube 44 is inserted into the inner tube 42, and one end of the extraction tube 44 is opened at the upper portion of the inner tube 42. The lower end of the outer cylinder 46 of the second gas-liquid separation chamber 40 is a thin tube 46a in the shape of a funnel, and this thin tube 46a is connected to the inside of the water chamber body 14 through a check valve 48. On the other hand, on the upper side surface of the outer cylinder 46, the distal end of the conduit 34 opens into the outer cylinder 46 through the throttle 34a, and the combustion gas in which humidity remains is ejected from the throttle 34a into the outer cylinder 46. The liquid is further separated from the combustion gas and returned to the water chamber body 14 in the process until the combustion gas reaches the extraction pipe 44 through the inner cylinder 42. As a result, dry combustion gas can be obtained from the delivery pipe 18.

  In the second embodiment, the first and second gas-liquid separation chambers 30 and 40 can obtain the dry combustion gas as described above, and the water 22 filled in the water chamber body 14 is also significantly less consumed. Therefore, there is an advantage that water replenishment to the water chamber body 14 from the outside is not so required. The water level in the water chamber body 14 can be easily known from the outside by providing a water level gauge 50 such as glass shown in FIG. 2 on the side wall of the water chamber body 14.

  FIG. 3 shows a third preferred embodiment of the water-type flashback prevention device according to the present invention. The same or corresponding members as those of the embodiment shown in FIGS. To do.

  What is characteristic in the third embodiment is that the first gas-liquid separation chamber 30 is provided above the interior of the water chamber body 14, and the combustion gas in the water chamber body 14 once passes from the plug port 60 through the connection pipe 61. It goes outside and is then led again to the first gas-liquid separation chamber 30 provided inside the water chamber body 14. The combustion gas is guided from the first gas-liquid separation chamber 30 to the second gas-liquid separation chamber 40, and is sent from the second gas-liquid separation chamber 40 through the delivery pipe 18 to the combustion device. The water separated in the first gas-liquid separation chamber 30 is returned to the water chamber body 14 from a discharge port (not shown) provided at the lower end of the first gas-liquid separation chamber 30.

  In FIG. 3, it is preferable to further provide a third gas-liquid separation chamber in the conduit 62 leading from the first gas-liquid separation chamber 30 to the second gas-liquid separation chamber 40 as shown in FIG. It is.

  In the third embodiment, unlike the first and second embodiments, the end portion of the connecting tube 20 on the side of the vacant body 12 does not extend to the bottom of the vacant body 12, but simply the vacant body 12. Connected to the side wall. The combustion gas source supply path 70 supplied to the receiving port 12 a of the vacant body 12 has an inner end 70 a extending to the bottom of the vacant body 12.

  As a result, when a backfire occurs on the combustion device side, the water 22 in the water chamber body 14 is sent to the empty chamber body 12 through the connecting pipe 20, and the inner end 70a of the supply passage 70 is immediately submerged. Thus, the vacant body 12 can perform a suitable shielding function against flashback.

  FIG. 4 shows a preferred fourth embodiment of the water-type backfire prevention device according to the present invention. The same or corresponding members as those of the above-described embodiments are denoted by the same reference numerals, and description thereof is omitted.

  This embodiment is similar to the second embodiment, but is characterized in that the first gas-liquid separation chamber 30 is provided in the upper part of the water chamber body 14 coaxially with the water chamber body 14, thereby Since the coupling between the liquid separation chamber 30 and the water chamber body 14 is performed on the central axes of the both, there is an advantage that the assembling process is extremely easy. As a result, in the fourth embodiment, the second gas-liquid separation chamber 40 is configured to return the separated liquid from the side surface of the water chamber body 14 into the water chamber body 14.

  As described above, according to the water type backfire prevention device according to the present invention, the water type backfire prevention device in which the vacant body and the water chamber body are connected in series in the combustion gas supply path is provided. At the time of combustion, the vacant body hardly becomes resistance to the supply of the combustion gas, and a stable supply of the combustion gas can be performed. Also, when a backfire occurs on the combustion device side, the water in the water chamber body is also guided to the vacant body, which can double shield against the backfire, and the backfire is a combustion gas source. It is possible to surely prevent reaching and to promote reliable fire extinguishing.

The principal part sectional view showing a suitable 1st embodiment of the water type backfire prevention device concerning the present invention. The principal part sectional view showing a 2nd embodiment of the present invention. Sectional drawing which shows the principal part which shows suitable 3rd Embodiment of this invention. A Western dance sectional view showing a fourth preferred embodiment of the semi-invention.

Explanation of symbols

  12 vacant bodies, 14 water chamber bodies, 18 delivery pipes, 20 connecting pipes, 30 first gas-liquid separation chamber, 40 second gas-liquid separation chamber.

Claims (2)

And tightly closed, empty chamber body,
A supply path connected to the vacant body and supplying combustion gas from a combustion gas source to the vacant body;
A sealed water chamber body that is connected to the vacant body with a connecting pipe and filled with water;
A delivery pipe for delivering combustion gas from the water chamber body,
The connecting pipe is arranged so that one end extends to the vicinity of the bottom of the water chamber body , the other end is connected to the side wall of the empty chamber body, and the middle part between the one end and the other end is positioned higher than the water surface of the water chamber body. And
A water-type backfire prevention device installed in a combustion gas supply path, wherein the supply path is disposed with its inner end extending to the bottom of the vacant body .   2. The water type flashback prevention device according to claim 1, wherein a gas-liquid separation chamber is provided in the combustion gas delivery path of the water chamber body.

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