CN2173678Y - Controllable oxyhydrogen welding and cutting machine - Google Patents
Controllable oxyhydrogen welding and cutting machine Download PDFInfo
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- CN2173678Y CN2173678Y CN 93246061 CN93246061U CN2173678Y CN 2173678 Y CN2173678 Y CN 2173678Y CN 93246061 CN93246061 CN 93246061 CN 93246061 U CN93246061 U CN 93246061U CN 2173678 Y CN2173678 Y CN 2173678Y
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Abstract
The utility model relates to a controllable oxyhydrogen welding and cutting machine. A bridge type rectifying power supply and an oxyhydrogen separate type generator are arranged in a housing; the oxyhydrogen separate type generator is composed of a water chamber at the bottom, a plurality of groups of combined electrolysis chambers at the middle part and hydrogen gas and oxygen gas chambers at the top; flat plate type double-face electrodes and box-shaped electrodes are arranged in the electrolysis chambers; a hydrogen and oxygen separator is arranged between every two electrodes; the oxygen chamber and the hydrogen chamber are respectively coupled with a condenser, a gas-liquid processor, a drier, a pressure regulating valve, a backfire valve and a welding torch in respective flow path through an oxygen transmission air passage and a hydrogen transmission air passage. The utility model has the advantages that the air demand can be regulated randomly, the oxyhydrogen proportion can be flexibly controlled, the welding and cutting quality are high, the electric power consumption is small, and the heat radiation performance is favorable.
Description
The utility model relates to a kind of controlled oxyhydrogen welding and cutting machine, is to utilize brine electrolysis to produce hydrogen-oxygen to carry out the equipment of gas cutting and gas welding, and has welding set.
Chinese patent CN2095053U discloses a kind of oxyhydrogen welding and cutting machine, this machine is by the two electrolytic cells of dress in the glass fibre reinforced plastics casing, liquid gas knockout drum, the combustion adjuvant jar, Pressure gauge, liquid level gauge, pressure controller, rupture disk, backfire controller, automatic watering controller, gas-liquid filteration device and welding torch constitute, because it is thermal source that this machine adopts hydrogen and oxygen mixture, can't regulate and control the hydrogen-oxygen ratio, necessary killing during gas welding, when cutting, the temperature that gaseous mixture produces is low, again must be with combustion adjuvant, be difficult for guaranteeing the welding quality, the electrolytic cell that this secret is closed is provided with the polytetrafluoroethyllining lining poor radiation, so must set up water cooling and air-cooling device.
The purpose of this utility model is to provide a kind of controlled oxyhydrogen welding and cutting machine, and this machine can overcome above-mentioned deficiency, regulates the size of gas production at any time according to the needs of gas welding and gas cutting, and can regulate and control the ratio of hydrogen or oxygen gas flexibly.
The purpose of this utility model is achieved in that a kind of controlled oxyhydrogen welding and cutting machine, organism, transformer and bridge rectification power are installed on it, the gas-liquid pipeline, hydrogen-oxygen separate type generator and welding torch, sump is equipped with in this generator bottom, the middle part is installed in series organizes compound tank houses more, in the middle of in this tank house flat double-face electrode is housed, the boxlike electrode is equipped with in both sides, and the insulated enclosure pad is installed between each electrode, the hydrogen or oxygen gas separator is installed between boxlike electrode and the flat double-face electrode, this separator one side is the hydrogen generation chamber, and opposite side is the oxygen generation chamber, and hydrogen storehouse and oxygen bin are equipped with in hydrogen-oxygen separate type generator top; Hydrogen generation chamber and hydrogen storehouse UNICOM, oxygen generation chamber and oxygen bin UNICOM; The hydrogen storehouse is through defeated hydrogen road and hydrogen gas condenser UNICOM, and this condenser is through defeated hydrogen road and hydrogen gas-liquid process tank UNICOM, and this process tank bottom is through the sump of reflux line bottom access hydrogen-oxygen separate type generator after the hydrogen gas condenser bottom pipe is in parallel; Oxygen bin is through oxygen therapy air flue and oxygen condenser UNICOM, and this condenser inserts the sump of hydrogen-oxygen separate type generator bottom through oxygen therapy air flue and oxygen gas-liquid process tank UNICOM after the return duct of this process tank bottom return duct bottom the oxygen condenser is in parallel; The bottom of described oxygen and hydrogen gas-liquid process tank is filled with purifies waste water, and porous barrier is equipped with at the middle part, and gas-liquid separator is equipped with at the top, in the gas-liquid separator exit burst disk, pressure-relief valve, electro connecting pressure gauge is housed; There is the device for supplying of purifying waste water to insert hydrogen, oxygen gas-liquid process tank inlet respectively through pipeline; The hydrogen input port of described welding torch by the road with hydrogen gas-liquid process tank on gas-liquid separator air supply opening UNICOM, the drier of contacting in this pipeline, pressure regulator valve and tempering valve, the oxygen input port of this welding torch, by the road with oxygen gas-liquid process tank on gas-liquid separator air supply opening UNICOM, connect in this pipeline drier, pressure regulator valve and tempering valve, at the two ends of pressure regulator valve, one in parallel constitutes automatic storage oxygen device by automatic inflation pump, storage oxygen cylinder and oxygen gauge.Hydrogen or oxygen gas separator in the utility model only allows the electrolyte circulation of these separator both sides, and hydrogen that produces on two lateral electrodes or oxygen can not mix through this separator, boxlike electrode in the utility model and flat double-face electrode all adopt corrosion resistant plate to make, on anode surface, do the sandblast Nickel Plating Treatment, do blasting treatment on the cathode surface.Each tank house has two radiating surfaces, and the multi-disc fin is arranged, and not only gas production is big but also perfect heat-dissipating, flow of oxygen is less during the gas welding operation, can utilize automatic storage device that oxygen is stored, flow of oxygen increases during gas cutting, and deposit oxygen can be discharged increases oxygen supply.
In power circuit of the present utility model, can also add thyristor and receiver circuit, remote controlled transmitting circuit is installed on welding torch, utilize remote signal to regulate the power output of power supply, the gas production of control hydrogen-oxygen separate type generator.
Therefore, the utility model compared with the prior art: following advantage is arranged.
1, utilizes the hydrogen or oxygen gas separator that hydrogen, oxygen separation are opened, and on the oxygen road, add the automatic storage device of oxygen, regulate air demand at any time, reach flexible regulation and control hydrogen-oxygen ratio, guaranteed the welding quality.
2, compound tank house is done electrode with corrosion resistant plate, and each compound tank house all has two radiating surfaces and multi-disc fin, and perfect heat-dissipating can work long hours.
3, hydrogen-oxygen separate type generator architecture is simple, is convenient to disassembly, cleaning, and is easy to maintenance, guaranteed gas production.
4, the device for supplying of purifying waste water can make the utility model use ordinary tap water, and prevents that heavy metal from depositing on electrode.
5, the utility model electrode coupling is reasonable, and decomposition voltage is suitable, can reduce power consumption, energy savings.
6, use remote signal to regulate gas production at random, improved operating efficiency, guaranteed the welding quality, saved electric energy again.
Below in conjunction with drawings and Examples, the utility model is described further.
Fig. 1, the utility model structural representation
Fig. 2, hydrogen-oxygen separate type generator architecture figure
Fig. 3, hydrogen-oxygen separate type generator side view (Fig. 2 A is to view)
Fig. 4, compound tank house enlarged drawing
Fig. 5, the silicon controlled rectification power source schematic diagram
Fig. 6, the remote control transmitter circuit
Fig. 7, receiver circuit
Referring to accompanying drawing, the utility model have one long 70 centimetres, wide 40 centimetres, high 50 centimetres body, hydrogen-oxygen separate type generator is housed in body, for sake of convenience, body is saved, the each several part device is launched, the utility model is equipped with sump 2 in hydrogen-oxygen separate type generator 1 bottom, the middle part 24 groups of compound tank houses 3 that are installed in series, leave heat dissipation channel 6 between per two groups of compound tank houses, flat double-face electrode 4 is housed in the middle of in this tank house, this electrode is simultaneously to do blasting treatment with corrosion resistant plate, another side is made do nickel plating, the boxlike electrode 5 that corrosion resistant plate is made is equipped with in these electrode both sides, a boxlike electrode is done blasting treatment, another boxlike electrode is made Nickel Plating Treatment, install insulated enclosure pad 26 and fastening between three electrodes additional with bolt 27, hydrogen or oxygen gas separator 7 is installed in the middle of boxlike electrode and the flat double-face electrode, on two boxlike electrode lateral surfaces multi-disc is housed and props up muscle formula fin 10, compound tank house relies on the outer surface and the fin heat radiation of its boxlike electrode, and the electrolysis operating temperature is remained on about 40 ℃-60 ℃.The hydrogen or oxygen gas separator forms through the special process sintering, and electrolyte can successfully penetrate this separator, and hydrogen molecule or oxygen molecule then can't see through this separator, thereby just forms hydrogen generation chamber 8 and oxygen generation chamber 9 respectively in these separator both sides.All have two hydrogen generation chamber and two oxygen generation chamber in each compound tank house, be full of concentration in this tank house and be 20% potassium hydroxide electrolyte.At the top of hydrogen-oxygen separate type generator hydrogen storehouse 11 and oxygen bin 12 are housed, the hydrogen generation chamber is by the pore 13 and hydrogen storehouse UNICOM at its top, the oxygen generation chamber is by the pore and the oxygen bin UNICOM of its top other end, the hydrogen storehouse is through defeated hydrogen road 14 and hydrogen gas condenser 15 UNICOMs, the hydrogen that electrolysis produces enters the expansion cooling suddenly later on of this condenser, the droplet of blending in gas separated from hydrogen, purer hydrogen enters hydrogen gas-liquid process tank 16 along the defeated hydrogen road of this condenser overhead, this process tank bottom is filled with pure water, it is contour that its liquid level position and compound tank house top liquid level keep, the hydrogen that enters this process tank can rise to this jar middle part after washing, at this process tank middle part porous barrier 17 is housed, which is provided with hygroscopic agent, gas-liquid separator 18 also is equipped with at this process tank top, and hydrogen is further purified behind hygroscopic agent and gas-liquid separator.The sump of hydrogen-oxygen separate type generator bottom is inserted in this process tank bottom after the reflux line of reflux line 19 bottom hydrogen gas condenser is in parallel.Identical with hydrogen flow path, oxygen bin is through oxygen therapy air flue 20 and oxygen condenser 21, oxygen gas-liquid process tank 22 UNICOMs.Have one purify waste water device for supplying 23 through pipeline respectively with oxygen, hydrogen gas-liquid process tank UNICOM, after-purification water in it at any time.Purify waste water and ion exchange resin and exchange column are housed in the replenisher tank of device for supplying, be used for producing and purify waste water.Burst disk, electro connecting pressure gauge 25 and pressure-relief valve 24 are equipped with in gas-liquid separator outlet at the gas-liquid process tank top of oxygen, hydrogen, the normally closed interlock BJ-1 of this electro connecting pressure gauge is serially connected in the bridge rectification power loop, when the pressure in gas-liquid separator exit is higher than 3 kilograms, normally closed interlock BJ-1 opens and cuts off the electricity supply, and the utility model is quit work.The hydrogen input port of welding torch 30 connects with gas-liquid separator air supply opening on the hydrogen gas-liquid process tank by the road, serial connection drier 31, pressure regulator valve 28 and tempering valve 29 in this pipeline.The oxygen input port of welding torch connects with gas-liquid separator air supply opening on the oxygen gas-liquid process tank by the road, is connected in series drier, pressure regulator valve and tempering valve in this pipeline.At the two ends of pressure regulator valve 28, an automatic storage oxygen device that constitutes by automatic inflation pump 32, storage oxygen cylinder 33 and oxygen gauge 34 in parallel.When welding, oxygen is excessive, and automatic inflation pump will start automatically according to the oxygen pressure signal, and to the inflation of storage oxygen cylinder, and oxygen demand increases when cutting, and the oxygen in the storage oxygen cylinder can in time discharge again for cutting and use.The dc source that present embodiment uses is to use common transformer B, bridge rectifier BR to constitute.Regulate more conveniently for electric current, voltage parameter that dc source is provided, can also use silicon controlled rectification power source.
Two of present embodiment is exactly a controlled oxyhydrogen welding and cutting machine that uses silicon controlled rectification power source, this machine can use common transformer, also can use the A.C. welder core transformer, if use the electric welding machine core transformer, then this machine can not only gas welding, has also increased the electric welding function, and this machine can also be installed a remote control transmitter 38 on welding torch, receiver circuit is installed in SCR rectification circuit, can be realized the gas production of STOCHASTIC CONTROL hydrogen-oxygen separate type generator.
In silicon controlled rectification power source circuit 35, the 220V alternating current connects the elementary of electric welding machine core transformer B1, the alternating current about the secondary two ends output 7CV of B1.Controllable silicon SCR 1 and SCR2 and diode D1, D2 form single-phase full wave half control rectification circuit.The secondary two ends of the input termination B1 of this rectification circuit, and rectification circuit is exported unidirectional pulsating dc voltage, the mean value of this voltage can change by the trigger impulse phase place that changes between controllable silicon SCR 1 and SCR2 gate pole and negative electrode (B, A between) at 2.The output voltage of rectification circuit adds to the input of mu balanced circuit.Mu balanced circuit is by power tube T1, triode BG1, and voltage-stabiliser tube DW1 and resistance R 1, R2, RW, R4, R5 form.Wherein, R4 one is connected to the high level output of pulsating volage after the rectification, and the other end of R4 is connected to the negative electrode of voltage-stabiliser tube DW1, and the anode of DW1 connects the low level output of pulsating volage.Thereby provide an electric current of voltage regulation to DW1.The colelctor electrode of power tube T1 is connected to the high level output of pulsating volage after the rectification, and the base stage of T1 is connected to the colelctor electrode of triode BG1, and the emitter stage of T1 output 70V DC voltage.The emitter stage of BG1 is connected to the negative electrode of DW1, and the base stage of BG1 is connected to the series connection bleeder circuit of being made up of RW, R2, R1, and DC voltage will be by pincers at 70V.R5 is connected on the base stage of T1 and inter-collector so that a conducting electric current to be provided.Capacitor C 1 is connected on dc output end and strobes.Controllable silicon triggers input B, 2 outputs that should be connected to circuits for triggering of A.The phase place that changes trigger impulse just can change the silicon controlled angle of flow, thereby changes the output current of voltage-stabilized power supply, and the generating capacity of hydrogen and oxygen in the change hydrogen-oxygen separate type generator.In circuits for triggering 36, the 220V alternating current is connected to the elementary of transformer B2, and at the alternating voltage of secondary generation 15V, this voltage adds to the input of full-bridge rectification piece BR1, and BR1 exports unidirectional pulsating volage.Resistance R 6 and voltage-stabiliser tube DW2 form pressure limiting circuit, the termination BR1 output high level end of R6, and the negative electrode of another termination voltage-stabiliser tube DW2 of R6, the negative electrode of DW2 connects BR1 output low level end.Obtain by the pulsating volage of peak clipping at the DW2 two ends.Triode T2, capacitor C 2, resistance R 9, unijunction transistor J1, resistance R 10 are formed pulse-generator circuit, wherein the emitter stage of T2 connects the end of R9, the negative electrode of another termination DW2 of R9, the colelctor electrode of T2 connects the end of C2, the anode of another termination DW2 of C2, the gate pole of unijunction transistor connects the colelctor electrode of T2, the anode of unijunction transistor J1 connects the end of R10, the negative electrode of another termination DW2 of R10, and the negative electrode of unijunction transistor J1 connects pulse transformer B3 one end, the anode of another termination DW2 of B3, resistance R 8, R7 and triode BG2 form the electric capacity charge adjustment circuit.Wherein the BG2 colelctor electrode connects the end of R7, the negative electrode of another termination of R7 DW2, and the emitter stage of BG2 connects the end of R8, the anode of another termination DW2 of R8, the base stage of BG2 connects the receiver output.B3, diode, D3, D4, D5 form the SCR trigger pulse output circuit.Wherein D3 and at the elementary two ends of B3 plays the pressure limiting effect, and the anode of D4 connects an end of B3 level, and the negative electrode of D4 connects the negative electrode of D5, and the anode of D5 connects B3 time grade the other end.D5 two ends output SCR trigger pulse.
The voltage swing that changes BG2 base input end C can change the phase place of trigger impulse.Can add that a voltage regulation component also can provide an input voltage by receiver circuit at the C end.
In receiver circuit, induction coil L1 and capacitor C 4 formed antiresonant circuits, and antenna TY1 and capacitor C 3 series connection also are connected to the end of L1, and this circuit receives resonant frequency
Signal.This signal amplifies by the input that secondary induction coil is connected to resonance amplifier.Resonance amplifier is by triode, BG3, and resistance R 11, R12, R13, capacitor C 5, C6, induction coil L3 form, and wherein R11, R12 composition bleeder circuit provides a direct current bias voltage for the base stage of triode BG3.R13 and C5 parallel connection, the emitting stage of the termination BG3 of C5, the other end ground connection of C5, L3 and C6 form resonance circuit, the termination BG3 colelctor electrode of C6, another termination power high level end of C6.Form the voltage to frequency translation circuit by induction coil L4 and F/V converter, the input of the two termination F/V of L4, F/V output C meets the base input end C of the BG2 of thyristor gating circuit.Along with the difference of receive frequency, the output impulse phase of circuits for triggering is also different like this.
In the remote control transmitter circuit, RWG and capacitor C 8, unijunction transistor J2, resistance R 14 and R18 form oscillating circuit.Wherein variable resistor RWG and C8 series connection, power supply BAT adds to the two ends of capacitor C 7 by K switch, the end ground connection of C7, the end of another termination RWG of C7, the gate pole of unijunction transistor J2 connects the tie point of C8 and RWG, and the anode of J2 connects the end of R14, the positive pole of another termination of R14 C7, the negative electrode of J2 connects the end of R18, R18 other end ground connection.Adjust the size of RWG, can change frequency of oscillation.The two ends output frequency of oscillation of R18.Triode BG4, capacitor C 10, C11, C12, resistance R 17 and induction coil L5 form amplifier, and frequency of oscillation is amplified.Wherein resistance R 15 and R16 are connected on the two ends of C7, the base stage of BG4 connects the contact of R15 and R16, C10 and at the two ends of R16, the emitting stage of BG4 connects the end of R17, other end ground connection, C11 and between the emitting stage and colelctor electrode of BG4, C12 and L5 form resonance amplifier, the colelctor electrode of the termination BG4 of C12, the positive pole of another termination C7 of C12 is launched through C13 and antenna TY2 through the oscillator signal after amplifying.
Therefore adjusting RWG can change frequency, thereby changes the output current of silicon controlled rectification power source, thus the hydrogen-oxygen generating capacity of control hydrogen-oxygen separate type generator.The power of present embodiment can be regulated between 0-5000 watt.
Claims (2)
1, a kind of controlled oxyhydrogen welding and cutting machine, organism, transformer and bridge rectification power are installed on it, oxyhydrogen generator, gas-liquid pipeline and welding torch, it is characterized in that, described oxyhydrogen generator is a hydrogen-oxygen separate type generator (1), sump (2) is equipped with in this generator bottom, the middle part is installed in series organizes compound tank houses (3) more, in the middle of in this tank house flat double-face electrode (4) is housed, boxlike electrode (5) is equipped with in both sides, and the insulated enclosure pad is installed between each electrode, hydrogen or oxygen gas separator (7) is installed between boxlike electrode and the flat double-face electrode, this separator one side is hydrogen generation chamber (8), and opposite side is oxygen generation chamber (9), and hydrogen storehouse (11) and oxygen bin (12) are equipped with in hydrogen-oxygen separate type generator top; Hydrogen generation chamber and hydrogen storehouse UNICOM, oxygen generation chamber and oxygen bin UNICOM; The hydrogen storehouse is through defeated hydrogen road (14) and hydrogen gas condenser (15) UNICOM, this condenser is through defeated hydrogen road and hydrogen gas-liquid process tank (16) UNICOM, and this process tank bottom is through the sump of reflux line (19) bottom access hydrogen-oxygen separate type generator after the hydrogen gas condenser bottom pipe is in parallel; Oxygen bin is through oxygen therapy air flue (20) and oxygen condenser (21) UNICOM, this condenser inserts the sump of hydrogen-oxygen separate type generator bottom through oxygen therapy air flue and oxygen gas-liquid process tank (22) UNICOM after the return duct of this process tank bottom return duct bottom the oxygen condenser is in parallel; The bottom of described oxygen and hydrogen gas-liquid process tank is filled with purifies waste water, and porous barrier (17) is equipped with at the middle part, and gas-liquid separator (18) is equipped with at the top, and burst disk, pressure-relief valve (24), electro connecting pressure gauge (25) are housed in the gas-liquid separator exit; There is the device for supplying of purifying waste water (23) to insert hydrogen, oxygen gas-liquid process tank inlet respectively through pipeline; The hydrogen input port of described welding torch (30) by the road with hydrogen gas-liquid process tank on gas-liquid separator air supply opening UNICOM, the drier (31) of contacting in this pipeline, pressure regulator valve (28) and tempering valve (29), the oxygen input port of this welding torch, by the road with oxygen gas-liquid process tank on gas-liquid separator air supply opening UNICOM, connect in this pipeline drier, pressure regulator valve and tempering valve, at the two ends of pressure regulator valve, one in parallel constitutes storage oxygen device automatically by automatic inflation pump (32), storage oxygen cylinder (33) and oxygen gauge (34).
2, oxyhydrogen welding and cutting machine according to claim 1, it is characterized in that, described bridge rectification power is a silicon controlled rectification power source, the single-phase full wave half control rectification circuit that constitutes by controllable silicon SCR 1 and SCR2 and diode D1 and D2, this rectification circuit input end connects with transformer B1 secondary electrical, the output voltage of this rectification circuit adds to the input of mu balanced circuit, mu balanced circuit is made up of power tube T1, triode BG1, voltage-stabiliser tube DW1 and resistance R 1, R2, R4, R5, RW, and the dc output end and the generator for separating hydrogen and oxygen of silicon controlled rectification power source electrically connect; Controllable silicon triggers input A, B and connects the circuits for triggering output; Transformer B2 secondary coil in the circuits for triggering is connected to full-bridge rectification piece BR1, and full-bridge rectification piece output is connected to the pressure limiting circuit of being made up of resistance R 6 and voltage-stabiliser tube; The charge adjustment circuit of forming by resistance R 7, R8 triode BG2; The pulse-generator circuit of forming by triode T2, capacitor C 2, resistance R 9, R10 unijunction transistor J1; And constitute the trigger impulse output circuit by pulse transformer B3, diode D4, D5; A remote-controlled launcher (38) is installed on the described welding torch, in the remote-controlled launcher circuit, form oscillating circuit by variable resistor RWG, capacitor C 8, unijunction transistor J2, resistance R 14 and R18, by triode BG4, capacitor C 10, C11, C12, resistance R 17 and induction coil L
5Form resonance amplifier, output end of oscillating circuit connects the resonance amplifier input, antenna TY2 and capacitor C 13 series connection induction coil L
5One end; In receiver circuit, by induction coil L
1Form antiresonant circuit with capacitor C 4, antenna TY1 and capacitor C 3 series connections are to L
1An end, form resonance amplifier by triode BG3, resistance R 11, R12, R13, capacitor C 5, C6, induction coil L3, form the voltage to frequency translation circuit by induction coil L4 and F/V converter, F/V output C connects the triode BG2 base input end of described thyristor gating circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93246061 CN2173678Y (en) | 1993-12-08 | 1993-12-08 | Controllable oxyhydrogen welding and cutting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93246061 CN2173678Y (en) | 1993-12-08 | 1993-12-08 | Controllable oxyhydrogen welding and cutting machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2173678Y true CN2173678Y (en) | 1994-08-10 |
Family
ID=33818844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93246061 Expired - Fee Related CN2173678Y (en) | 1993-12-08 | 1993-12-08 | Controllable oxyhydrogen welding and cutting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2173678Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104781887A (en) * | 2013-01-30 | 2015-07-15 | 索非亚投资与工程公司 | Method and practical device composition for purification of air from gaseous tritium and concentration of tritium in a constant volume of water |
| CN111659974A (en) * | 2020-05-14 | 2020-09-15 | 钟晓华 | Anti-backfire oxyhydrogen cutting machine with leakage protection function |
| CN113369627A (en) * | 2021-07-01 | 2021-09-10 | 广东省科学院中乌焊接研究所 | Welding equipment |
-
1993
- 1993-12-08 CN CN 93246061 patent/CN2173678Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104781887A (en) * | 2013-01-30 | 2015-07-15 | 索非亚投资与工程公司 | Method and practical device composition for purification of air from gaseous tritium and concentration of tritium in a constant volume of water |
| CN111659974A (en) * | 2020-05-14 | 2020-09-15 | 钟晓华 | Anti-backfire oxyhydrogen cutting machine with leakage protection function |
| CN113369627A (en) * | 2021-07-01 | 2021-09-10 | 广东省科学院中乌焊接研究所 | Welding equipment |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |