JP2005146302A - Device for generating mixed gas of hydrogen and oxygen, and electrolytic cell thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water electrolysis unit and an electrolytic cell for stably, efficiently and safely generating a hydrogen-oxygen mixed gas by solving problems of a conventional device for generating a mixed gas of hydrogen and oxygen. <P>SOLUTION: The device 10 for generating the hydrogen-oxygen mixed gas has an electrolysis section 100 comprising many electrolytic cells 100a, 100b and 100c, which electrolyze water therein to produce and output the hydrogen-oxygen mixed gas. The electrolysis section 100 has a power source 200 for electrolysis, an automatic supply tank 300 for automatically supplying a correct amount of water to the electrolysis section 100 as water is consumed through decomposition, and a cooling means 400 for preventing overheat. The device also has a gas-collecting means 500, a pressure control section 600 which constantly controls the pressure of the mixed gas of hydrogen and oxygen to be collected and supplied and is installed in the rear end of the gas-collecting means, and a backfire-preventing section 700 installed further in the rear end of the pressure control section. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an apparatus for electrolyzing water to generate a mixed gas having a hydrogen: oxygen chemical equivalent ratio of 2: 1.

  As a method for generating hydrogen and oxygen by electrolyzing water, there are a method in which each gas is generated in a separated state and a method in which each gas is generated in a mixed form. The present invention relates to a mixed gas generator that generates hydrogen and oxygen in a mixed form.

As a mixed gas generator of hydrogen and oxygen, as disclosed in the following patent document, conventionally, a plurality of electrode plates are stacked inside an electrolytic cell, and a rubber-like insulating member is interposed therebetween. A structure in which each electrode plate is isolated and insulated is widely used.
Japanese Patent Laid-Open No. 06-192868 Japanese Patent Laid-Open No. 08-260177 Japanese Patent Laid-Open No. 09-071886 JP-A-11-001790

  However, due to the use of a rubber material as the insulating material between the electrode plates, over time, the electrolyte deteriorates and deforms due to the electrolyte and heat, causing electrolyte leakage and short circuits. A lot.

  In addition, due to the structure of the electrolytic cell, the distance between the electrode plates is as narrow as about 3 mm. Not only does the electrolysis efficiency of the electrolyte decrease due to the deterioration of the rubbery material, but the heat generation is intense and the power loss increases. There is also a problem that time operation is impossible.

  The present invention provides a water electrolysis apparatus capable of solving a problem in a conventional mixed gas generator of hydrogen and oxygen and generating a hydrogen / oxygen mixed gas stably and efficiently.

  The basic configuration of an apparatus for electrolyzing water according to the present invention to generate a mixed gas of hydrogen and oxygen is an electrolysis unit formed by a plurality of electrolytic cells that electrolyze water to generate a hydrogen / oxygen mixed gas; A power supply unit for supplying DC power to the electrolysis unit, a pressure control unit for generating a hydrogen / oxygen mixed gas having an appropriate pressure in the electrolysis unit, and preventing an external flame from flashing back into the electrolytic cell The operation of the electrolysis unit is controlled according to a change in the pressure of the mixed gas generated and discharged in the electrolysis tank, and the temperature of the electrolysis tank is controlled to prevent overheating. Therefore, it has a control part which controls supply electric power.

  In addition, the basic configuration of the electrolytic cell for electrolyzing water of the present invention to generate a mixed gas of hydrogen and oxygen is arranged symmetrically, and positive and negative DC power supplies are applied to the left and right sides, respectively. A pair of left and right electrolytic cell cases that combine to form an electrolysis chamber inside, electrolyze the water supplied into the electrolysis chamber to generate and discharge a hydrogen / oxygen mixed gas, and a water passage at the bottom A plurality of electrode plates with gas vent holes formed in the upper part and mounting grooves for vertical mounting of each electrode plate are formed, and the front electrode plate is placed in the electrolytic chamber at regular intervals. And an electrode plate insulating support frame for supporting the arrangement, and an insulating plate is disposed between the coupling contact portions of the pair of electrolytic cell cases to insulate the electrolytic cells from each other.

  Since the hydrogen / oxygen mixed gas generator of the present invention is provided with a large number of electrolytic cells, a large volume of mixed gas can be supplied by collecting the mixed gas generated in these electrolytic cells.

  In addition, the mixed gas obtained in the electrolytic cell is passed through a pressure regulator, water-sealed backfire preventer, moisture remover, flame regulator, and dry backfire preventer in order, and supplied to a supply object such as a fusing torch. Because it will be provided, it is excellent in safety.

  Furthermore, it is possible to easily mount the electrode plates and maintain an appropriate distance between the respective electrode plates.

  In addition, an automatic water supply tank can be provided, and an appropriate amount of water can be stably supplied into the electrolytic cell. It can prevent fire and secure safety.

  Hereinafter, embodiments of the present invention will be described based on examples shown in the accompanying drawings.

  FIG. 1 is an exploded perspective view of a hydrogen / oxygen mixed gas generator according to the present invention. FIGS. 2a and 2b are an assembled perspective view and an external perspective view of FIG.

  Referring to these drawings, the hydrogen / oxygen mixed gas generator 10 of the present invention generates a hydrogen / oxygen mixed gas by electrolyzing water therein and outputs a plurality of electrolytic cells 100a, 100b, 100c. It has the electrolysis part 100 comprised by these.

  The electrolysis unit 100 is provided with a power source 200 for electrolysis and an automatic supply tank 300 that automatically supplies the electrolysis unit 100 with an appropriate amount of water along with its decomposition and consumption.

  Each electrolytic cell 100a, 100b, 100c is provided with a cooling means 400 for preventing overheating.

  The cooling means 400 is constituted by cooling fans 410 and 420 disposed adjacent to the electrolytic cells 100a, 100b, and 100c. The cooling fans 410 and 420 automatically operate when the temperature of the electrolytic cells 100a, 100b, and 100c rises by 30 ° C., which is higher than the normal temperature, to cool the electrolytic cells.

  Reference numeral 500 denotes a gas collecting means for collecting and sending out a mixed gas of hydrogen and oxygen generated in each of the electrolytic cells 100a, 100b, and 100c.

  In this gas collecting means 500, gas discharge ports 102a, 102b, 102c of the respective electrolytic cells 100a, 100b, 100c are connected together by a hose 510 and a connection valve 520, and are generated in the respective electrolytic cells. Collect the mixed gas into one and send it out.

  At the rear end of the gas collecting means 500, there is provided a pressure adjusting unit 600 that controls the pressure of the mixed gas of hydrogen and oxygen to be sent out together.

  Reference numeral 600 denotes a pressure adjusting unit constituted by the primary pressure detector 610 and the secondary pressure detector 620.

When the generated gas pressure reaches about 1 kgf / cm ^{2, the} primary pressure detector 610 stops the power generation to the electrolysis unit 100 and interrupts the production of the gas, and drops to about 0.8 kgf / cm ^2. Then, power supply is started and the generation of cracked gas is resumed.
Further, the secondary pressure detector 620 has a function of a secondary safety means for interrupting gas generation when the gas pressure reaches about 1.5 kgf / cm ² when the primary pressure detector 610 fails.

  Reference numeral 700 denotes a backfire prevention unit disposed at the rear end of the pressure adjustment unit 600.

  This backfire prevention unit 700 is reverse to a water-sealed backfire preventer 710 that prevents backfire by allowing the generated mixed gas to pass through the water, and a ceramic backfire block that can withstand high temperatures. It is comprised by the dry-type back flash preventer 720 which prevents backfire by setting it as the structure which changes the flow of the flame at the time of a fire. In this way, in the present invention, it is possible to completely prevent backfire by passing the product gas through the double backfire preventers 710 and 720.

  Between the water-sealed backfire preventer 710 and the dry backfire preventer 720, when using a water remover 730 for removing a small amount of water contained in the mixed gas and the discharged gas, A flame regulator 740 is provided for adjusting the temperature of the ignition flame to a temperature suitable for the intended use.

  In addition, the device 800 includes not only current and voltage control but also a pressure control unit, an electrolyte temperature sensor, a thermometer, a water level sensor for an automatic water tank, a power lamp, an emergency lamp, an emergency buzzer, an ammeter and a voltmeter. The control part which comprehensively controls the component of is shown.

  The AC200V three-phase current from the power source 200 described above is transformed into AC75V by the transformer 210, and further converted into direct current by the AC / DC converter 220 to remove the pulsating current, and then into the electrolytic cells 100a, 100b, 100c. Supplied.

  When power is supplied from the power source 200 to each of the electrolytic cells 100a, 100b, and 100c, an insulating material piece 12a is interposed to prevent current from leaking to the support frame 12 to which each electrolytic cell is attached. In this state, the insulating bushing 101a is inserted into the bolt 101, and the electrolytic cells 100a, 100b, 100c and the support frame 12 are fastened.

  3 to 13 show details of the constituent members shown in FIGS.

  3 is an exploded perspective view of 100a showing one of the electrolytic cells constituting the electrolysis unit 100 shown in FIG. 1, FIG. 4 is an assembled perspective view thereof, and FIG. It is sectional drawing of a -A line.

  As shown in these drawings, in the electrolytic cell 100a, left and right cases 110 and 120 having the same size and area are arranged symmetrically.

  The coupling holes 112 and 122 are formed in the respective edges of the cases 110 and 120, and the bolts 130 are inserted and the nuts 132 are fastened with the coupling plates 114 and 124 being in close contact with each other. The left and right cases 110 and 120 are brought into close contact with each other and combined.

  When the left and right cases 110 and 120 are joined, an insulating plate 140 is interposed between the joining plates 114 and 124, and the two cases are formed in an insulating state. An electrolysis chamber is formed.

  The insulating plate 140 is compressed when the right and left cases 110 and 120 are fastened with the fastening bolts 130. Therefore, the insulating plate 140 must be made of an elastic material such as rubber. In particular, Neoprene, which does not become conductive even when compressed, is desirable, and by installing insulating papers 142 and 144 on both sides of the insulating plate 140, an almost perfect insulating effect can be obtained.

  The insulating plate 140 and the insulating papers 142 and 144 are respectively formed with rectangular hollows having the same size and shape as the coupling plates 114 and 124, and are inserted into portions corresponding to the coupling holes 112 and 122, respectively. Through holes 140a, 142a, and 144a for passing through the fastening bolts 130 are formed. As a result, the coupling holes 112, 122 and the through holes 140a, 142a, 144a of the left and right cases 110, 120 communicate with each other, and the right and left cases 110, 120 are coupled by the fastening bolts 130 and the nuts 132 through the communication holes. It will be.

  In this connection, the fastening bolts 130 are also made of metal. Therefore, in order to completely insulate the left and right cases 110 and 120, the insulating bushings 150 are inserted into the connection holes 112 and 122 and the through holes 140a, 142a and 144a. In the state, the fastening bolt 130 is inserted into the high temperature insulating bushing 150, and the coupling holes 112, 122 and the through holes 140a, 142a, 144a are provided on the nut 132 side with the high temperature insulating washer 152 interposed. The nut 132 is fastened to the inserted fastening bolt 130.

  When joining the left and right cases 110 and 120, first, an adhesive for gasket is applied to the inside of the joining plate 114 of one case 110, and the insulating paper 142 is attached thereto, and then the outside of the insulating paper 142. Again, the gasket adhesive is applied and the insulating plate 140 is attached. Then, an adhesive for gasket is applied to the outside of the insulating plate 140 and the insulating paper 144 is attached, and then an adhesive for gasket is applied to the outside of the insulating paper 144 to bond the bonding plate 124 of the case 120 on the other side. After the insulating bushing 150 and the insulating washer 152 are attached, the cases 110 and 120 are joined by the fastening bolt 130 and the nut 132. As a material of the insulating bushing 150 and the insulating washer 152, polyoxymethylene having excellent insulating properties is preferable.

  A large number of electrode plates 160 are arranged in an internal electrolysis chamber formed by combining the cases 110 and 120 on both the left and right sides. In order to arrange these electrode plates 160 at equal intervals, a support frame 170 for supporting the electrode plates in an insulating state is provided in the electrolysis chamber.

  As described above, in the electrolytic cell 100a composed of symmetrical left and right cases 110 and 120 having the same size and the same area, water is manually supplied to the upper side and the gas discharge port 102 for discharging the generated mixed gas. A manual water supply port 103 in the case of supply, a water supply connection port 105 for supplying a part of the produced mixed gas to an automatic water supply tank (not shown), and adjusting the pressure of the automatic water supply tank to the pressure of the electrolytic cell 100a and electrolysis A safety valve 104 that is activated when an abnormal pressure is generated in the tank 100a is provided.

The safety valve 104 is opened when the pressure in the electrolytic cell 100a exceeds the operating range and reaches a dangerous level, and serves to discharge gas to the outside, and operates at an operating pressure of about 3 kgf / cm ^2. Is set. The electrolytic cell 100a has a water supply port 106 for receiving water from an automatic water supply tank, and a drain valve 107 for discharging the electrolytic solution when the electrolytic cell is cleaned and the electrolytic solution is replaced. 110 and 120 are provided at the lower end on the left front side. The water supply port 106 is formed in the lower left part of the left rear side of the electrolytic cell cases 110 and 120 in the drawing.

  As described above, the left and right cases 110 and 120 are electrically insulated, and an anode is connected to one side and a cathode is connected to the other side. Power supply input terminals 116 and 126 are provided at intermediate portions of the left and right cases 110 and 120, respectively.

  In the case of a large-capacity hydrogen / oxygen mixed gas generator, two or more electrolytic cells 100a, 100b, and 100c having the same structure are connected in series with connecting wires, and the case of the electrolytic cell 100a on one side is connected. An anode power source is applied to the power input terminal, and a cathode power source is applied to the power input terminal of the case of the electrolytic cell 100c on the other side.

  Conversely, the effect is the same even when a cathode power source is applied to the power input terminal of the left case of the electrolytic cell 100a on one side and an anode power source is applied to the power input terminal of the right case of the electrolytic cell 100c on the other side.

  Aluminum heat sinks 180 are mounted on the upper and lower sides of the power input terminals 116 and 126 via insulating paper 182. The insulating paper 182 reduces power loss by allowing the current supplied to the electrolytic cell cases 110 and 120 to flow to the heat sink 180.

  The surface of the heat sink 180 is made of polytetrafluoroethylene (Poly Tetraa) to prevent corrosion of the case due to contact with the cases 110 and 120 made of stainless steel SUS316, and to provide resistance to heat and corrosion resistance. Fluoro Ethylene) is desirable.

  The heat sink 180 is connected to the cases 110 and 120 by fixing the bolts 118 and 128 by welding or the like, and forming the through holes 182a and 180a in the insulating paper 182 and the heat sink 180 and inserting them into the bolts 118 and 128. This is done by fastening and connecting nuts 184, 186 on the outside.

  In this connection, a cylindrical insulating bushing 150a is interposed between the bolts 118 and 128 and the through holes 182a and 180a, and an annular insulating washer 152a is interposed between the nuts 184 and 186 and the heat sink 180. .

  The electrolytic cell 100a is also provided with a water level gauge 190 and a temperature sensor.

  This temperature sensor includes an electrolytic solution temperature sensor 192 that detects the temperature of the electrolytic solution inside the electrolytic bath 100a and an electrolytic bath temperature sensor 194 that detects the surface temperature of the electrolytic bath 100a.

  When the temperature of the electrolytic solution detected by the electrolytic solution temperature sensor 192 reaches about 90 ° C., the power supply to the electrolytic cell 100a is automatically cut off. When the electrolytic cell temperature sensor 194 detects that the electrolytic cell is overheated, an electrolytic cell cooling fan (not shown) is activated to cool the electrolytic cell 100a.

  6 to 8 show details of the electrode plate insulating support frame 170. FIG. 6 is an exploded perspective view showing in detail the structure of the electrode plate shown in FIG. 4 and the electrode plate insulating support frame 170 supporting the electrode plate, and FIGS. 7a and 7b are the electrodes shown in FIG. FIG. 8 is a plan view of the lower plate portion of the plate insulating support frame and a side view thereof, and FIG. 8 is a plan view of the upper plate portion of the electrode plate insulating support frame shown in FIG.

  As shown in these drawings, the electrode plate insulating support frame 170 is composed of four unit plates 170a to 170d that are made of an epoxy resin having excellent heat resistance insulation and have substantially the same shape in the upper, lower, left, and right directions. Thus, a square formwork is formed. Among the unit plates, the left and right side plate portions 170a and 170b and the lower plate portion 170d have mounting grooves 172 that are supported by the edge of the electrode plate 160 entering a certain portion on the upper surface of the inner drawing as shown in FIGS. 7a and 7b. Are formed at equal intervals. In the present embodiment, eight mounting grooves 172 are formed at regular intervals as shown in FIG. 7a.

  These mounting grooves 172 have a function as an electrode plate insertion slot, are linear grooves having a width of about 1.5 mm, a depth of about 6 mm, and a distance of about 17 mm is appropriate. It is. In the left and right plate portions 170a and 170b and the lower plate portion 170d, there is no member other than the mounting groove 172 in a flat plate-like body. In addition to the mounting groove, the upper plate 170c has a gas discharge port, a manual water supply port, a water supply connection port, and a gas connected to a safety valve formed on the upper side of the electrolytic cell case as shown in FIG. A discharge port communication hole 173, a manual water supply port communication hole 174, a water feeder connection port communication hole 175, and a safety valve communication hole 176 are formed. Water can be supplied between the electrode plates through these holes, and the produced and produced mixed gas can be discharged.

  In order to reduce heat generation of the electrode plate 160, these mounting grooves 172 are preferably separated from each other by an interval of at least 10 mm, and preferably formed at an interval of 17 mm. Further, the depth needs to be a depth at which the electrode plate 160 is stably supported, and is preferably at least 3 mm or more and about 6 mm. As described above, since the electrode plate 160 is vertically inserted and mounted in the mounting groove 172 of the electrode plate insulating support frame 170 accommodated vertically in the electrolytic chamber, they can be arranged at an interval of approximately 17 mm in the electrolytic chamber and can be stably supported. A state is obtained.

  The electrode plate 160 is made of stainless steel SUS316 having a thickness of about 1 mm, and is formed with a water passage hole 162 for passing an electrolyte solution having a width of 22 mm with a distance of 6 mm from the lower end.

  The reason why the distance from the lower end is 6 mm is that the electrode plate 160 is mounted in the mounting groove of the electrode plate insulating support frame 170 at a position 6 mm from the lower end. Then, by forming a water passage hole 162 with a separation of 6 mm, all the electrolyte solution in the space defined between the electrode plates is discharged when the electrolyte solution is replaced. Can do.

  A gas vent 164 through which the generated mixed gas can flow is formed on the electrode plate 160. The gas ventilation holes 164 are preferably formed in a pair of left and right on the upper side of the electrode plate 160, and the appropriate size is about 22 mm in diameter.

  The water flow holes 162 formed in the electrode plate 160 are for preventing current from flowing to only one side during electrolysis. When arranging a large number of electrode plates 160, Forms water passage holes 162 on the left side, and adjacent plates form water passage holes 162 on the right side so that the positions of the water passage holes are alternately arranged on the left and right.

  FIG. 9 shows a configuration of an automatic water supply tank 300 applied to the present invention.

  The automatic water supply tank 300 automatically replenishes the electrolytic cell with water consumed during electrolysis. A water supply port 302 for supplying water to the electrolytic cell is provided at the bottom of the tank, and water is supplied into the tank. Is provided with a water inlet 304 for replenishing water. At the upper part of the tank, there is provided a water level detection sensor 310 for detecting a water level inside the tank and sending a signal for opening and closing a solenoid valve 306 connected to the water inlet 304 through a hose or a pipe when water is insufficient.

  A check valve 308 is installed at the rear end of the solenoid valve 306 to prevent the supplied water from flowing backward.

  Next to the water level detection sensor 310, a manual water supply port 320 that can be manually refilled with water, a safety valve 330 that operates in the event of a pressure abnormality in the tank, a water supply connecting port of the electrolytic cell, a hose, a pipe, etc. And a pressure adjusting port 340 that makes the internal pressure of the tank the same as the internal pressure of the electrolytic cell.

  At the same time, a water level gauge 350 that can recognize the water level inside the tank is provided on the upper side of the side surface of the tank, and a drain valve 360 for discharging the water inside the tank is provided on the lower side of the tank. Mounted plate portions 370 and 370a in which bolt holes 372 and 372a are formed to be seated on the support frame of the apparatus and to be coupled with bolts are provided on the front and rear of the upper portion.

  FIG. 10a is a longitudinal sectional view of a backfire preventer applied to the present invention, and FIG. 10b is a plan view thereof.

  This backfire preventer constitutes a double backfire prevention unit, one of which is a water-sealed backfire preventer 710. This water-sealed backfire preventer 710 allows the mixed gas generated in the electrolytic cell to pass through the water and then discharge it, so that if the flame flows backward toward the discharge port 711, The flame reaching the inlet 712 is blocked by water. As a result, the reverse flow of the flame is blocked by water and the flame is prevented from reaching the electrolytic cell.

  The structure of the water-sealed backfire preventer 710 will be described in more detail. A gas supply pipe 715 is inserted from above into a backfire prevention liquid tank 714 filled with water to a certain height, and cut off near the bottom. It is bent and arranged in the shape of “L”.

  A fine gas outflow hole 715a is formed in the bent inner end of the gas supply pipe 715, and the gas flows into the backfire prevention liquid tank 714 through the gas outflow hole 715a. At least one or more gas dispersion plates 716 and 717 are disposed above the gas outflow hole 715a of the gas supply pipe 715, and two in the present embodiment are arranged above and below at regular intervals. Supply pipe through holes 716a and 717a through which the gas supply pipe 715 passes are formed in the gas dispersion plates 716 and 717, and innumerable fine gas dispersion holes 716b and 717b are formed in the periphery thereof. The gas dispersion holes 716b and 717b have a diameter of approximately 2 mm inside and outside and a smaller diameter than the gas outflow hole 715a.

  With this structure, the mixed gas exiting through the gas outflow hole 715a passes through the gas dispersion holes 716b and 717b of the double gas dispersion plates 716 and 717, thereby suppressing the generation of bubbles and discharging the backfire prevention liquid tank 714. It is discharged through the outlet 711.

  The backfire prevention liquid tank 714 is preferably formed in a cylindrical shape, and the gas dispersion plates 716 and 717 mounted therein are also formed in a disk shape. Of course, the gas dispersion plates 716 and 717 are fixed inside the backfire prevention liquid tank 714 at a predetermined interval by welding or the like. An air inlet 718a for injecting water into the interior of the flashback prevention liquid tank 714 and an air port 718a that forms an air passage so that water can easily enter the tank when water is injected through the water inlet 718. Is provided. A drain valve 719 is provided below the backfire prevention liquid tank 714 to discharge the internal water.

  As described above, the mixed gas is discharged from the water-sealed backfire preventer 710 and supplied to the moisture remover 730 for removing moisture contained in the mixed gas.

  FIG. 11 a and FIG. 11 b show the principle and structure of this moisture remover 730. FIG. 11a is a longitudinal sectional view showing in detail the structure of the moisture remover in the present invention, and FIG. 11b is a sectional view taken along the line BB of FIG. 11a.

  The moisture remover 730 serves to remove a small amount of moisture contained in the mixed gas. The moisture remover 730 is connected to a gas inflow pipe 734 eccentrically to the side surface of the remover cylinder 732, and a gas outflow pipe 735 is partially inserted into the interior from the upper surface of the remover cylinder 732 on the central axis. Is fixed. The end portion of the gas outflow pipe 735 is generally located at the intermediate portion of the remover cylinder 732, and the gas inflow pipe 734 is located above the end portion of the gas outflow pipe 735. A funnel-shaped moisture removal pipe 736 is disposed below the gas outflow pipe 735, and the lower part thereof communicates with a drain valve 738 provided at the lower end of the remover cylinder 732.

  Due to such a structure of the moisture remover 730, the mixed gas discharged from the water-sealed backfire preventer 710 flows eccentrically into the moisture remover 730 through the gas inflow pipe 734. The inflowing mixed gas descends while rotating along the inside of the remover cylinder 732, and at this time, the moisture contained in the mixed gas falls and is separated by the generated centrifugal force. Further, the separated water is collected in the moisture removing pipe 736. The mixed gas from which moisture has been removed flows into the gas outflow pipe 735, moves toward the upper portion of the remover cylinder 732, and flows out. The water collected in the water removal pipe 736 is discharged to the outside by opening the drain valve 738.

  The mixed gas exiting the moisture remover through the gas outlet pipe 735 is then flowed into the flame regulator.

  This flame regulator is shown in FIG. FIG. 12a is a longitudinal sectional view of the flame regulator, and FIG. 12b is a plan view thereof.

  As shown in the figure, the flame regulator 740 has the same structure as the water-sealed backfire preventer 710 shown in FIG. That is, a gas inflow pipe 742 cut into a shape of “L” is inserted into a cylindrical organic solvent tank 741 filled with an organic solvent up to a certain height from the top, and the mixed gas is organic at the bottom. The mixed gas is supplied to the inside of the solvent tank 741 and the mixed gas is discharged to the discharge port 746 through the gas dispersion plates 744 and 745 installed in two stages. However, the organic solvent tank 741 of the flame controller 740 is filled with an organic solvent up to a certain height, and normal hexane, methyl alcohol, or the like is used as the organic solvent in accordance with the application. Accordingly, the mixed gas that has flowed into the flame regulator 740 through the gas inflow pipe 742 passes through the organic solvent tank 741, and a small amount of the organic solvent is included in the mixed gas as a gaseous form. Will change the temperature of the flame. In this way, the mixed gas containing the organic solvent is discharged to the outside through the discharge port 746 provided in the upper part of the organic solvent tank 741 and supplied to the dry flashback preventer 720.

  FIG. 13 is a longitudinal sectional view showing the dry flashback preventer 720. As shown in FIG.

  As shown in the figure, the dry flashback protector 720 includes a lower casing 722 that has a space formed therein, and an upper plug 724 that is screwed into the upper end opening of the lower casing 722. The upper plug 724 is formed with a gas inflow passage 724a in the central vertical direction. The gas inflow passage 724a is branched at the end into a plurality of narrow flow tubes 724b, and the flame flow is changed during backfire. To play a role.

  Therefore, the mixed gas supplied by the above-described flame regulator flows into the lower casing 722 through the flow narrow tube 724b through the gas inflow passage 724a of the upper plug 724.

  A backfire blocking piece 726 is mounted inside the lower casing 722.

  The backfire blocking piece 726 is supported in the lower casing 722 by an elastic piece 728 made of stainless steel, the lower end is opened in a cylindrical shape, and the upper end is closed.

  Further, the backfire blocking piece 726 is made of a ceramic material in which fine pores are formed, and blocks the flame that flows back into the outflow port 722a formed at the lower end of the lower casing 722. The mixed gas flowing in through the flow capillary 724b of the upper plug 724 flows through the fine pores toward the outlet 722a. A female thread 722b is formed at the outlet 722a of the lower casing 722, and a nipple 729 is connected thereto. A gas supply hose is connected to the nipple 729 to supply the mixed gas to an apparatus for using the mixed gas, for example, a fusing torch.

  FIG. 14 is a block diagram illustrating the configuration and function of the power supply unit 200.

  In the figure, a power supply unit 200 includes a voltage regulator SCR 230 that adjusts and outputs a supply voltage, and a transformer that transforms to AC 75 V by receiving AC 200 V three-phase AC supplied through the voltage regulator 230. 210, an AC / DC converter 220 that converts AC 75V alternating current output from the transformer 210 into direct current, and a pulsating flow is removed from the direct current output in the AC / DC converter 220 and supplied to the electrolysis unit 100. The pulsating flow remover 240 is provided. The pulsating flow remover 240 is connected to only one polarity of the current output from the AC / DC converter 220, for example, the cathode.

  In the example shown in the figure, since three electrolytic cells 100a, 100b, and 100c are connected in series to the power supply unit 200 and DC25V is used for each operating voltage, the final output from the power supply unit 200 is performed. The voltage is DC75V. Even when there are four or more electrolytic cells, the voltage supplied from the power supply unit 200 can be adjusted.

  FIG. 15 is a block diagram schematically showing the configuration of the hydrogen / oxygen mixed gas generator according to the present invention.

  This block diagram shows the operation flow of the hydrogen / oxygen mixed gas generating apparatus of the present invention sequentially, and the operation of the apparatus of the present invention will be described.

When direct current is supplied from the power supply unit 200 to the electrolysis unit 100 constituted by the electrolytic cells 100a, 100b, and 100c filled with the electrolytic solution, electrolysis occurs and a hydrogen / oxygen mixed gas is generated. The generated mixed gas is collected into one and transferred to the water-sealed backfire preventer 710 through the pressure control unit 600. The gas pressure signal detected by the pressure adjustment unit 600 is transferred to the control unit 800. When the gas pressure detected by the primary pressure detector 610 of the pressure adjusting unit 600 reaches about 1 kgf / cm ² , the control unit 800 stops the power supply of the power supply unit 200 and interrupts the gas production. When the gas pressure drops to about 0.8 kgf / cm ^2, power is supplied again, and gas generation is resumed. The secondary pressure detector 620 has a function of a secondary safety device that interrupts gas production when the gas pressure reaches about 1.5 kgf / cm ² when the primary pressure detector 610 fails. When such an electrolytic cell operation is interrupted, the user is informed of the abnormal state of the equipment through an emergency lamp and buzzer.

  In this way, the mixed gas input through the pressure adjusting unit 600 passes through the water-sealed backfire preventer 710 and flows into the moisture remover 730. Moisture is removed by the moisture remover 730, and only the mixed gas flows out through the discharge port provided on the upper side and flows into the flame regulator 740. In the flame regulator 740, the mixed gas is mixed with a predetermined organic solvent and flows to the dry flashback preventer 720. The mixed gas that has passed through the dry flashback preventer 720 is supplied to a device that requires the mixed gas for use. As an example, a supply hose is connected to the nipple 729 of the dry flashback preventer 720, and the mixed gas is supplied to the fusing torch to be used as a fusing gas source.

  FIG. 16 is a block diagram illustrating the control operation of the control unit in the apparatus of the present invention.

  As shown in FIG. 16, when water is electrolyzed in the electrolytic baths 100a, 100b, and 100c to produce a mixed gas, the electrolyte temperature sensor 192 continuously senses the temperature of the electrolyte and sends it to the power controller 810. Will be transferred. At this time, when the detected temperature of the electrolytic solution exceeds 90 ° C., the power supply control unit 810 sends a signal to the power supply unit 200 to cut off the electric supply to the electrolytic cells 100a, 100b, and 100c.

  At the same time, the temperature of the electrolytic cell surface is also sensed by the electrolytic cell temperature sensor 194. When the detected temperature reaches 30 ° C. or higher, the cooling fan drive switch 820 is activated to drive the cooling fans 410 and 420, and the electrolytic cell 100a, 100b and 100c are cooled. On the other hand, when the amount of water in the electrolytic cell decreases due to generation of the mixed gas in the electrolytic cells 100a, 100b, and 100c and reaches a certain water level, the automatic water tank 300 is installed at the same height and automatically supplies water. The water level is also lowered accordingly. At this time, the water level detection sensor 310 provided in the automatic water supply tank 300 detects the water level and transfers it to the water level adjustment switch 830 if it is below a certain amount. As a result, the water level adjustment switch 830 is actuated to drive the solenoid valve 306 to supply water from the water supply to the automatic water supply tank 300.

  The embodiments disclosed herein are intended to assist those skilled in the art, and the technical idea of the present invention is not limited by the description of the embodiments, and is within the scope of the technical idea of the present invention. Of course, various modifications are possible.

  The mixed gas of hydrogen and oxygen produced by this equipment is not only used as a heat source for welding, cutting, various heat processing, etc., but also a hydrogen and oxygen mixed gas heater, hydrogen / oxygen mixed gas boiler, hydrogen It can also be widely used as a fuel supply device for oxygen mixed gas heating furnaces, hydrogen / oxygen mixed gas incinerators, hydrogen / oxygen mixed gas carbonizers, mixed gas engines, and the like.

It is an exploded perspective view of the hydrogen / oxygen mixed gas generator of the present invention, FIG. 2A is an assembly perspective view of the hydrogen / oxygen mixed gas generator of the present invention, and FIG. The disassembled perspective view of the electrolytic cell of the hydrogen-oxygen mixed gas generator by this invention is shown. Similarly, an assembly drawing of the electrolytic cell is shown. It is sectional drawing of the AA line of FIG. 1 shows the structure of an electrode plate and an electrode plate insulating support frame that supports the electrode plate. FIG. 7A is a plan view and FIG. 7B is a side view showing a lower plate portion of an electrode plate insulating support type. The top view of the upper board of an electrode plate insulation support frame is shown. It is a block diagram of an automatic water supply tank. It is a block diagram of a water seal type | mold backfire preventer, FIG. 10a is a longitudinal cross-sectional view, and FIG. 10b is a top view. Indicates a moisture remover. 11a is a longitudinal sectional view, and FIG. 11b is a sectional view taken along line BB of FIG. 11a. Indicates a flame regulator. 12a shows a longitudinal section, and FIG. 12b shows a plan view. It is a longitudinal cross-sectional view of a dry-type backfire preventer. It is a block diagram which shows the structure of a power supply part. It is a block diagram for demonstrating the operation state of this invention. It is a block diagram for demonstrating the control action of a control part.

Explanation of symbols

100: Electrolytic part 100a, 100b, 100c: Electrolyzer 110, 120: Left and right cases 140: Insulating plate 150: Insulating bushing 152: Insulating washer 160: Electrode plate 170: Electrode plate insulating support type 180: Heat sink 190: Water level gauge 192 : Electrolyte temperature sensor 194: Electrolyzer temperature sensor 200: Power supply unit 210: Transformer 220: AC / DC converter 300: Automatic water supply tank 400: Cooling means 500: Gas collecting means 600: Pressure adjusting unit 610: Primary Pressure detector 620: Secondary pressure detector 700: Backfire prevention unit 710: Water-sealed backfire prevention device 720: Dry backfire prevention device 730: Moisture removal device 740: Flame regulator 800: Control unit

Claims (14)

An electrolysis unit formed by a plurality of electrolytic cells that electrolyze water to generate a hydrogen / oxygen mixed gas;
A power supply section for supplying direct current power to the electrolysis section;
A pressure adjusting unit for generating a hydrogen / oxygen mixed gas having an appropriate pressure in the electrolyzing unit;
In order to control the operation of the electrolysis unit according to a change in the pressure of the mixed gas generated and discharged in the electrolytic cell, and to control the temperature of the electrolytic cell to prevent overheating, supply power is A mixed gas generator of hydrogen and oxygen having a control unit for controlling. It has an automatic water supply tank that automatically supplies water when the water in the electrolyzer is insufficient,
In this automatic water tank,
When the water level falls to the water replenishment position, a water level detection sensor that detects this and transfers it to the control unit,
2. The hydrogen / oxygen mixed gas generator according to claim 1, further comprising a solenoid valve connected to a water supply source and opened by an operation signal of a control unit to supply water to an automatic water supply tank. An electrolytic solution temperature sensor that is installed inside the electrolytic cell case, detects the temperature of the electrolytic solution inside the electrolytic cell, and transfers the detected value to the control unit;
An electrolytic cell temperature sensor that is attached to the electrolytic cell case, detects the surface temperature of the electrolytic cell, and transfers the detected value to the control unit,
The mixed gas generation of hydrogen and oxygen according to claim 1 or 2, further comprising a cooling fan for cooling the electrolytic cell driven by the control unit according to a change in temperature detected by the electrolytic cell temperature sensor. apparatus. The control unit
A power supply control unit that receives a signal detected by the electrolyte temperature sensor and shuts off the power supply to the electrolytic cell and stops the operation of the electrolytic cell when the temperature of the electrolytic solution reaches a preset temperature;
A cooling fan drive switch that drives the cooling fan to cool the electrolytic cell when the surface temperature of the electrolytic cell detected by the electrolytic cell temperature sensor reaches a preset temperature;
4. The hydrogen / oxygen mixed gas generator according to claim 3, further comprising a water level adjustment switch that opens the solenoid valve according to the water level of the automatic water tank detected by the water level sensor and supplies water. The backfire prevention part
A water-sealed backfire preventer that prevents the backfire by allowing the mixed gas that has passed through the pressure control section to pass through the backfire prevention liquid circle filled with water;
Equipped with a flashback piece with fine pores inside the casing, and a dry flashback prevention device that prevents the flashback by preventing the flame from passing through the mixed gas through the flashback piece. The hydrogen and oxygen mixed gas generator according to claim 1. A moisture remover that removes a small amount of moisture contained in the mixed gas that has passed through the water-sealed backfire prevention device;
A flame controller that adjusts the flame temperature so that the mixed gas that has passed through the moisture remover passes through a container filled with an organic solvent and a predetermined amount of the organic solvent is contained in the mixed gas as a gaseous form. The mixed gas generator for hydrogen and oxygen according to claim 5, further comprising: The pressure adjusting unit detects the gas pressure of the mixed gas generated in the electrolytic cell and transfers it to the control unit, thereby supplying or shutting off the power of the power supply unit at a preset pressure to control the operation of the electrolytic cell. A primary pressure detector;
2. The hydrogen / oxygen mixed gas generator according to claim 1, further comprising a secondary pressure detector that stops the operation of the electrolytic cell when an allowable value is exceeded in the event of a failure of the primary pressure detector. They are arranged symmetrically, and positive and negative DC power supplies are applied to both the left and right sides, respectively, which are combined to form an electrolysis chamber inside, and the water supplied inside the electrolysis chamber is electrolyzed to generate hydrogen and oxygen A pair of left and right electrolytic cell cases for generating and discharging a mixed gas;
A plurality of electrode plates in which water holes are formed in the lower portion and gas vent holes are formed in the upper portion;
A mounting groove for vertical mounting of each electrode plate is formed, and an electrode plate insulating support frame for arranging and supporting the front electrode plate in the electrolytic chamber at regular intervals,
A mixed gas generation electrolytic cell of hydrogen and oxygen in which an insulating plate is disposed between the joint contact portions of the pair of electrolytic cell cases to insulate the electrolytic cells from each other.   The hydrogen-oxygen mixed gas generating electrolytic cell according to claim 8, further comprising insulating paper attached to both sides of the insulating plate and interposed between a pair of left and right electrolytic cell cases. At the top of each of the left and right electrolytic cell cases,
A manual water inlet for manually supplying water;
Connected to the automatic water tank with a hose, and a water supply port connection port for sending a part of the mixed gas generated internally to match the pressure to the above automatic water tank, and generated inside A gas outlet for discharging the mixed gas;
It is equipped with a safety valve that automatically discharges pressure when overpressure occurs.
Also,
At the bottom of each of the left and right electrolytic cell cases,
10. The hydrogen / oxygen mixed gas generating electrolytic cell according to claim 8, wherein a water supply port to which water is automatically supplied and a power input terminal to which positive / negative power is applied are formed.   The electrode plate insulating support frame is divided into upper, lower, left, and right sides, and the upper plate portion of these electrode plate insulating support frames communicates with the above-described manual water supply port, water feeder connection port, safety valve, and gas discharge port, respectively. The hydrogen / oxygen mixed gas generating electrolytic cell according to claim 8, wherein the holes are perforated.   The left and right electrolytic cell cases are fastened with bolts and nuts, insulation bushings are provided outside the bolts, and insulation washers are provided inside the nuts, so that the left and right electrolytic cell cases are insulated from each other. The hydrogen-oxygen mixed gas generating electrolytic cell according to claim 8.   9. The hydrogen / oxygen mixed gas generating electrolytic cell according to claim 8, wherein a heat radiating plate is attached to the surface of the electrolytic cell case through insulating paper.   9. The hydrogen / oxygen mixed gas generating electrolytic cell according to claim 8, wherein the electrode plate insulating support frame is made of an epoxy resin, and the interval between the mounting grooves is set to 10 mm or more.

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