CN204686249U - A kind of underwater welding electrodes arc welding special welding power supply - Google Patents
A kind of underwater welding electrodes arc welding special welding power supply Download PDFInfo
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- CN204686249U CN204686249U CN201520395963.6U CN201520395963U CN204686249U CN 204686249 U CN204686249 U CN 204686249U CN 201520395963 U CN201520395963 U CN 201520395963U CN 204686249 U CN204686249 U CN 204686249U
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- welding
- arc
- pwm controller
- remote control
- voltage
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Abstract
The utility model discloses a kind of underwater welding electrodes arc welding special welding power supply, comprising: welding current feedback circuit; Arc control circuit; Welding current remote control given circuit; Welding machine remote control starting or stopping control circuit; PWM controller; Inverter; Flex point judges; Described welding current remote control given circuit is connected with described PWM controller with described Arc control circuit, for PWM controller provides given value of current value; Described Arc control circuit and described flex point judge to be connected, knee voltage during for arranging Underwater Welding; The utility model provides that a kind of flexible operation, security are high, remote control start and stop, Real-time Obtaining arc voltage and loop resistance values, the underwater welding electrodes arc welding special welding power supply of knee voltage can be set in real time according to working environment.
Description
Technical field
The utility model relates to technical field of welding equipment, is specifically related to a kind of underwater welding electrodes arc welding special welding power supply.
Background technology
Underwater wet welding is in implementation process, and the electric arc that directly ignites in water welds, and does not take special pumping equipment, only relies on the gas produced during welding rod burning to reach protected effect.Relative to dry method welding, wet method has a certain distance in quality of weld joint etc., but with low cost with it, easy to operate, the advantage such as production efficiency is high and equipment is simple, still become the study hotspot of underwater welding technology.
During wet method Underwater Welding, diver wears diving suit and is in water.Because glassware for drinking water has conductive characteristic, therefore, in welding process, numb electrical phenomena can be there is unavoidably.When fiber crops electrical phenomena occurs, not only easily cause weld defect, what is more important can affect the mood of welder, produces fear, even affects healthy.Especially this phenomenon is should be noted when welding power source special design under water.
During diver's underwater operation, the land personnel's back work of general needs, this mainly comprises transmission operational order, ensures oxygen supply etc.If what carry out is Underwater Welding operation, onshore operations personnel also need the need of work according to welder under water, arrange source of welding current associated electrical parameters, control the start and stop etc. of welding machine.According to national regulation, in order to protect diving welder, the measure of employing is to be provided with the special equipment reliably for cutting off the electricity supply in welding circuit, can force disconnect power supply at any time.Conventional is in practice blade switch.This equipment is simple, but operation underaction, cut-off velocity is comparatively slow, and often have phenomenon of arc discharge when cutting off big current, this not only has certain danger, also therefore can increase the pressure drop at plug-in strip place.Therefore, the failure of current mode of Portable safety is needed.
If Underwater Welding aggravates because its special working environment result in electric arc compression, the phenomenons such as impedance loop increase.The conventional source of welding current, owing to mainly considering when it designs that the instructions for use of land welding designs, is applied under water, can bring certain impact by welding quality.To make the source of welding current to measure for Underwater Welding, needing researcher angularly to analyse in depth from arc physics, Underwater Welding technique, optimizing welding machine further.
Utility model content
For the deficiency that prior art exists, technical problem to be solved in the utility model is, there is provided that a kind of flexible operation, security are high, remote control start and stop, Real-time Obtaining arc voltage and loop resistance values, the underwater welding electrodes arc welding special welding power supply of knee voltage can be set in real time according to working environment.
For solving the problems of the technologies described above, technical solution adopted in the utility model is: a kind of underwater welding electrodes arc welding special welding power supply, comprising:
Welding current feedback circuit;
Arc control circuit;
Welding current remote control given circuit;
Welding machine remote control starting or stopping control circuit;
PWM controller;
Inverter;
Flex point judges;
Described welding current remote control given circuit is connected with described PWM controller with described Arc control circuit, for PWM controller provides given value of current value; Described Arc control circuit and described flex point judge to be connected, knee voltage during for arranging Underwater Welding; Described welding current feedback circuit is connected with described PWM controller, for PWM controller provides real-time welding current value of feedback; Described PWM controller is connected with described inverter, for inverter provides power switch component drive singal; Described welding machine remote control starting or stopping control circuit is connected with described inverter, is convenient to the start and stop realizing being controlled welding machine by remote control.
Above-mentioned underwater welding electrodes arc welding special welding power supply, described flex point judges to comprise arc voltage collection, knee voltage is arranged, the depth of water regulates, cable impedance regulates; Described arc voltage collection arranges with described knee voltage and judges to be connected with described flex point, for gathering arc voltage, carries out knee voltage setting; Described depth of water adjustment and the adjustment of described cable impedance arrange with knee voltage and are connected, for carrying out knee voltage correction according to the depth of water and resistance value.
The advantage of the utility model underwater welding electrodes arc welding special welding power supply is:
1, underwater welding electrodes arc welding special welding power supply, described welding current remote control given circuit, is installed to remote-control box place but not welding machine panel by original SMAW electric current preset knob, is convenient to site operation human users; Described welding machine remote control starting or stopping control circuit, for SMAW power supply adds welding machine on off control function; Traditional SMAW source of welding current, when after itself and power supply grid UNICOM, welding machine and in running order, without on off control button; Described Arc control circuit, can arrange knee voltage according to depth condition and cable resistance.
2, underwater welding electrodes arc welding special welding power supply, the Real-time Collection underwater construction degree of depth and cable impedance value, regulated by the depth of water and estimate out knee voltage correction value; Regulated by cable impedance, draw knee voltage correction value; After two different correction value process, for realizing the setting of knee voltage.
Accompanying drawing explanation
Fig. 1 is logic diagram of the present utility model.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments, the utility model is described in further details:
As shown in Figure 1, a kind of underwater welding electrodes arc welding special welding power supply, comprising: welding current feedback circuit; Arc control circuit; Welding current remote control given circuit; Welding machine remote control starting or stopping control circuit; PWM controller; Inverter; Flex point judges; Described welding current remote control given circuit is connected with described PWM controller with described Arc control circuit, for PWM controller provides given value of current value; Described Arc control circuit and described flex point judge to be connected, knee voltage during for arranging Underwater Welding; Described welding current feedback circuit is connected with described PWM controller, for PWM controller provides real-time welding current value of feedback; Described PWM controller is connected with described inverter, for inverter provides power switch component drive singal; Described welding machine remote control starting or stopping control circuit is connected with described inverter, is convenient to the start and stop realizing being controlled welding machine by remote control.
Described welding current feedback circuit is by Hall current sensor, and real-time welding current is changed into voltage signal, regulates the output current of welding machine for PWM controller;
Described welding current remote control given circuit, is installed to remote-control box place but not welding machine panel by original SMAW electric current preset knob, is convenient to site operation human users.
Described welding machine remote control starting or stopping control circuit, for SMAW power supply adds welding machine on off control function.Traditional SMAW source of welding current, when after itself and power supply grid UNICOM, welding machine and in running order, without on off control button.
Described Arc control circuit, can arrange knee voltage according to depth condition and cable resistance.Under water in wet method welding process, along with the increase of the depth of water, electric arc compression degree aggravates, and arc voltage corresponding to identical arc length increases thereupon, therefore, needs to arrange knee voltage according to depth condition.In addition along with the increase of the depth of water, the lengthening of cable, causes impedance loop also to return corresponding increase.Affect by above-mentioned two situations, need according to actual conditions, change knee voltage.
Described PWM controller, carries out Integrated comparative to Arc given value of current value, welding current set-point and feedback current, determines the dutycycle of the pulse signal controlling power switch component.
Described inverter, the impulse waveform that inner high power switch element provides according to PWM controller, high voltage direct current is changed into high-frequency and high-voltage alternating current, then by high frequency transformer, high-frequency high-voltage current is changed into high frequency low voltage electric current, low-voltage DC is changed into, for welding arc provides the energy finally by fast recovery diode.When carrying out SMAW in atmosphere, for improving arcing initiation success rate, the floating voltage that general employing is larger, but, in water, carry out welding operation, first must ensure the personal safety of welder, therefore, need control voltage to be set within safe voltage scope.
Described flex point judges to comprise arc voltage collection, knee voltage is arranged, the depth of water regulates, cable impedance regulates; Described arc voltage collection arranges with described knee voltage and judges to be connected with described flex point, for gathering arc voltage, carries out knee voltage setting; Described depth of water adjustment and the adjustment of described cable impedance arrange with knee voltage and are connected, for carrying out knee voltage correction according to the depth of water and resistance value.
Operator is regulated by the depth of water and cable impedance regulates, realize the correction to knee voltage: in depth of water adjustment process, by the degree of depth of the Underwater Welding construction location of setting, incorporation engineering experience, system estimates out the compression degree of this depth of water adjustment to electric arc, proposes knee voltage correction value by this; In cable impedance adjustment process, operate and surveyed and drawn by reality, evaluate cable impedance input system, system combines welding current preset in real time and cable impedance, draws knee voltage correction value.Two different correction values through integrated treatment, for realizing the setting of knee voltage.
Knee voltage is arranged, with basic knee voltage U
0for 18V, welding cable length is 60 meters, and sectional area is 70mm
2, the welding depth of water 50 meters, works as example under the conditions such as welding current 200A, is described:
Welding cable impedance is comparatively large on knee voltage impact, needs to realize by cable impedance adjustment welding machine knee voltage.According to national standard, sectional area is 70mm
2cable, the pass of impedance and length of cable is every 1000 meters of cables, impedance 0.28 Ω, when cable length is 0.06km, corresponding knee voltage correction value U
1=I
weld* (0.28 Ω/km*L*2), wherein, I
weldfor welding current, L is cable length.
Along with the increase of depth condition, the pressure increase of water environment to electric arc causes arc length to shorten, arc constriction, therefore needs to revise knee voltage in conjunction with hydraulic condition.Rule of thumb, the depth of water often increases by 10 meters, and knee voltage needs to increase 0.5V, corresponding knee voltage correction value U
2=0.05V/m*H, wherein H is the degree of depth of water.When the depth of water is 50 meters, U
2=2.5V.
Under these conditions, knee voltage U=U
0+ U
1+ U
2=18+6.72+2.5=27.22V.
For safe floating voltage, for ensureing underwater construction personnel personal safety, in the present embodiment, welding machine floating voltage is set to direct current 36V.
Certainly, above-mentioned explanation is not to restriction of the present utility model, and the utility model is also not limited to above-mentioned citing; those skilled in the art; in essential scope of the present utility model, the change made, change, interpolation or replacement, all should belong to protection domain of the present utility model.
Claims (2)
1. a underwater welding electrodes arc welding special welding power supply, is characterized in that: comprising:
Welding current feedback circuit;
Arc control circuit;
Welding current remote control given circuit;
Welding machine remote control starting or stopping control circuit;
PWM controller;
Inverter;
Flex point judges;
Described welding current remote control given circuit is connected with described PWM controller with described Arc control circuit, for PWM controller provides given value of current value; Described Arc control circuit and described flex point judge to be connected, knee voltage during for arranging Underwater Welding; Described welding current feedback circuit is connected with described PWM controller, for PWM controller provides real-time welding current value of feedback; Described PWM controller is connected with described inverter, for inverter provides power switch component drive singal; Described welding machine remote control starting or stopping control circuit is connected with described inverter, is convenient to the start and stop realizing being controlled welding machine by remote control.
2. underwater welding electrodes arc welding special welding power supply according to claim 1, is characterized in that: described flex point judges to comprise arc voltage collection, knee voltage is arranged, the depth of water regulates, cable impedance regulates; Described arc voltage collection arranges with described knee voltage and judges to be connected with described flex point, for gathering arc voltage, carries out knee voltage setting; Described depth of water adjustment and the adjustment of described cable impedance arrange with knee voltage and are connected, for carrying out knee voltage correction according to the depth of water and resistance value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520395963.6U CN204686249U (en) | 2015-06-10 | 2015-06-10 | A kind of underwater welding electrodes arc welding special welding power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520395963.6U CN204686249U (en) | 2015-06-10 | 2015-06-10 | A kind of underwater welding electrodes arc welding special welding power supply |
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| Publication Number | Publication Date |
|---|---|
| CN204686249U true CN204686249U (en) | 2015-10-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520395963.6U Expired - Fee Related CN204686249U (en) | 2015-06-10 | 2015-06-10 | A kind of underwater welding electrodes arc welding special welding power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106944718A (en) * | 2017-03-31 | 2017-07-14 | 山东省科学院海洋仪器仪表研究所 | A kind of split submersible type source of welding current |
| CN112439969A (en) * | 2019-09-04 | 2021-03-05 | 哈尔滨工业大学（威海） | Screen mesh type double-wire double-pulse underwater wet welding device and method |
-
2015
- 2015-06-10 CN CN201520395963.6U patent/CN204686249U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106944718A (en) * | 2017-03-31 | 2017-07-14 | 山东省科学院海洋仪器仪表研究所 | A kind of split submersible type source of welding current |
| CN112439969A (en) * | 2019-09-04 | 2021-03-05 | 哈尔滨工业大学（威海） | Screen mesh type double-wire double-pulse underwater wet welding device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Welding source of wet process welding rod arc welding special use under water Effective date of registration: 20161109 Granted publication date: 20151007 Pledgee: Qingdao high technology financing Company limited by guarantee Pledgor: Qingdao Ha Gong ocean engineering technology Co., Ltd Registration number: 2016990000938 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20171213 Granted publication date: 20151007 Pledgee: Qingdao high technology financing Company limited by guarantee Pledgor: Qingdao Ha Gong ocean engineering technology Co., Ltd Registration number: 2016990000938 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20210610 |
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| CF01 | Termination of patent right due to non-payment of annual fee |