CN2848441Y

CN2848441Y - Electric welding machine having intelligent detecting loop

Info

Publication number: CN2848441Y
Application number: CN 200520122940
Authority: CN
Inventors: 王建平
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-11-03
Filing date: 2005-11-03
Publication date: 2006-12-20
Anticipated expiration: 2015-11-03

Abstract

The utility model provides an electric welding machine with an intelligent detecting loop. An input system of a power supply is arranged in a casing. The electric welding machine with an intelligent detecting loop also comprises a group of separate windings without electrical equipment to connect with neutral points of a power supply network and earth ground is wound at the auxiliary side of a transformer of a main power supply. The primary side of the transformer of the main power supply is provided with an intelligent detecting loop. The detecting loop is connected with sampling points of a safety power supply circuit and a welding power supply circuit by sampling points, carries out sampling and comparison for a safe state, and gives indication or cuts off a power supply system of the detecting loop. The utility model has the advantage that in the intelligent detecting loop of the electric welding machine with the structure, the occurrences of the welding power supply circuit, a welding cable, and the safety power supply circuit can be detected that the welding power supply circuit, the welding cable, and the safety power supply circuit are connected in abnormal electric appliance with the phase wire of the power supply, because of the accident of earth leakage caused by the breakage of insulation or other unpredictable reasons. The utility model can carry out various state indications or can cut off the power supply circuit of the detecting loop in operation so as to ensure operator's personal safety.

Description

The electric welding machine that has the Intelligent Measurement loop

Technical field

The utility model relates to a kind of electric welding machine, particularly a kind of electric welding machine that has the Intelligent Measurement loop.

Background technology

In the process of present iron structure processing, various steelwork components or other metal parts are welded, be the important manufacturing process in the production process.Before the work of various performance electric welding machines with after the work, all many aided processes can be arranged, wherein have bevel to remove corrosion, multiple situations such as finishing after the welding, grinding are arranged.Simultaneously also can use multiple different movable electric tool in various process, the input power cord length of these movable electric tools is all below 2.5 meters.And the welded piece major part is a metal parts.Also have many metallic elements to be welded around the welding work pieces, the weight of these metallic elements is generally all heavier, the very sharp burr in addition that its periphery has.The Move tool of various electricity consumptions is shorter because of lead, generally all can use portable terminal plate.Electric tool input power cord and portable terminal plate input power lead can appear in these situations inevitably, often unavoidably can rub mutually with parts, even extruding, be easy to cause the wire insulation breakage like this, and produce electric shock accidents.

At present; the manufacturer that many Move tools are arranged is in insulation or semi-insulating state because of the position of its product contact; and do not do protectiveness zero line exit, but multiple Move tool rotates and clamping portion is the metal manufacturing, and this has brought great potential safety hazard for the constructing operation personnel.Though have the protectiveness connecting to neutral on the movable electric tool that has; but the protectiveness zero line of multiple movable electric tool; all can be subjected to tractive inevitably; under frequent tractive state; loosening, the fracture of protectiveness zero line; and happen occasionally with the contacted accident of input power supply phase line, great majority have all been installed the protection against electric shock protector with electric unit now.But, add that in addition circuit and the earth have the existence of distribution capacity because the job site is not very dry.The protection against electric shock protector in use if sensitivity is transferred too highly, is difficult to operate as normal under the superposition of multiple leakage current; If transfer the sensitivity of protection against electric shock protector low excessively, when electric shock accidents takes place, do not play protective action at all.Some job site transfer earth leakage protector sensitivity very low or simply throw away need not, this situation is especially in outdoor work high above the ground, particularly in occasions such as building and finishings, the tumble injury phenomenon that causes because of electric shock also happens occasionally.Because of its ground is extremely moist, when electric shock accidents took place, under many people worked the condition of rescuing mutually simultaneously, the rate of getting an electric shock and dying also was quite high.For this reason, the electric welding machine of anxious a kind of subsidiary safety power supply to be supplied stopping above-mentioned hidden danger, and plays a good protection.

Summary of the invention

In order to solve the problem that exists in the above-mentioned technology, a kind of electric welding machine that has the Intelligent Measurement loop that the utility model provides is used for the safe condition of safety power supply circuit and source of welding current circuit is detected.

For achieving the above object, the technical solution adopted in the utility model provides a kind of electric welding machine that has the Intelligent Measurement loop, it includes the casing of electric welding machine, the input system that is used to introduce welding machine electric power is housed in described casing, the input system of described power supply comprises: the quick socket CZ1 of input power supply, main power switch K1, main power source contactor CJ1, main power transformer B1, in the loop of main power transformer one side winding L 1 safety locking motion BX1 and BX2 are housed, also be included in main power transformer B1 secondary and be wound with one group of independent winding L4 that does not have electrical equipment to connect with the earth and supply network neutral point, be used to the miniature movable type electric tool that safety power supply is provided, wherein: the primary side at main power transformer B1 is equipped with the Intelligent Measurement loop, this detection loop is connected with the sampled point of safety power supply circuit with source of welding current circuit by sampled point, and safe condition is sampled, relatively and make indication or cut off its electric power system; This Intelligent Measurement loop is to insert K switch 1-1 in the normally opened contact CJ1-1 junction of main power transformer primary side safety locking motion BX1 end opening and main power source contactor CJ1, the other end of K switch 1-1 connects control circuit safeties BX2, the end of the other end Access Control circuit transformer B2 of safeties BX2, the control circuit transformer B2 other end is received the other end of main power transformer B1 input power supply primary side, the output of the second siding ring L6 of control circuit transformer B2 is connected with control circuit rectifier ZL1, control circuit rectifier ZL1 output and control relay J1, voltage comparator I1 connects successively, the other end of control relay J1 coil is connected with the colelctor electrode of triode BG2, the base stage of triode BG2 is connected with the output of voltage comparator I1, the in-phase input end of voltage comparator I1 respectively with divider resistance R9, sampling current-limiting resistance R8 is connected with R38, and divider resistance R1 on the negative pole of Intelligent Measurement loop circuit and the primary side main circuit and the dividing point F of R2 are connected.

Effect of the present utility model is the Intelligent Measurement loop of this structure electric welding machine, to be taken place welding power circuit, welding cable and safety power supply circuit, because of leakage accident over the ground that damage in insulation caused or because of all unpredictalbe reasons, and the improper electrical equipment that the source of welding current circuit that causes, welding cable and safety power supply circuit and power supply phase line take place is connected and detects, to carrying out the various states indication in the operation or cutting off its power supply circuits, to guarantee operator's personal safety.

Description of drawings

Fig. 1 is an electrical block diagram of the present utility model.

The specific embodiment

Reaching embodiment in conjunction with the accompanying drawings is illustrated the electric welding machine that has the Intelligent Measurement loop of the present utility model.

As shown in Figure 1, the electric welding machine that has the Intelligent Measurement loop of the present utility model, it is a kind of electric welding equipment that has the Intelligent Measurement loop, it includes the casing of electric welding machine, the input system that is used to introduce welding machine electric power is housed in described casing, the input system of described power supply comprises: the quick socket CZ1 of input power supply, main power switch K1, main power source contactor CJ1, main power transformer B1, in the loop of main power transformer one side winding L 1 safety locking motion BX1 is housed, BX2, it also is included in main power transformer B1 secondary and is wound with one group of independent winding L4 that does not have electrical equipment to connect with the earth and supply network neutral point, is used to the miniature movable type electric tool that safety power supply is provided.Primary side at main power transformer B1 is equipped with the Intelligent Measurement loop, and this detection loop is connected with the sampled point of safety power supply circuit with source of welding current circuit by sampled point, and safe condition is sampled, relatively and make indication or cut off its electric power system; This Intelligent Measurement loop is to insert K switch 1-1 in the normally opened contact CJ1-1 junction of main power transformer primary side safety locking motion BX1 end opening and main power source contactor CJ1, the other end of K switch 1-1 connects control circuit safeties BX2, the end of the other end Access Control circuit transformer B2 of safeties BX2, the control circuit transformer B2 other end is received the other end of main power transformer B1 input power supply primary side, the output of the second siding ring L6 of control circuit transformer B2 is connected with control circuit rectifier ZL1, control circuit rectifier ZL1 output and control relay J1, voltage comparator I1 connects successively, the other end of control relay J1 coil is connected with the colelctor electrode of triode BG2, the base stage of triode BG2 is connected with the output of voltage comparator I1, the in-phase input end of voltage comparator I1 respectively with divider resistance R9, sampling current-limiting resistance R8 is connected with R38, the negative pole of Intelligent Measurement loop circuit with import power supply primary side main circuit on divider resistance R1 and the dividing point F of R2 be connected.

To import the power supply quick plug by above-mentioned loop is connected with the quick socket CZ1 of input power supply, connect power supply, open main power switch K1, make main power source contactor CJ1 get electric adhesive CJ1-1 and two groups of normally opened contact closures of CJ1-2, main power transformer B1 gets the secondary L2 of electric B1, L3, three groups of windings of L4 produce induced voltage, L2 and L3 obtain operating voltage, carried out welding job, main power switch KB2 is and the KB1 interlock in addition, so KB1 closure in the time of closed main power switch, make the secondary of control transformer B2 survey the voltage that will induce 14 volts of one group of interchanges, after rectifier main part ZL1 rectifying and wave-filtering and voltage stabilizing, obtain the operating voltage of 12 volts of one group of direct currents, use for the secondary control circuit.Divider resistance R1 on the negative pole of safety power control circuit and the main circuit and the dividing point F of R2 link to each other, make safety control circuit negative pole and dividing point F equipotential, and obtain the comparison current potential at safety power supply one end by sample resistance R10, transmit comparison signal by sample resistance R10 through sampling diode D3 and current-limiting resistance R8 polyphone in addition, any end source of welding current circuit when safety power supply, the output loop of welding cable and safety power supply, because of the reason that can not meet, contact with phase line, the capital obtains an ac voltage signal, through sample resistance R10, sampling diode D3, current-limiting resistance R8 transmits comparison signal to the A of input in the same way of voltage comparator I1, become direct current signal under the effect of commutation diode D3, this signal will compare with the comparison current potential of setting certainly of the reverse input end B of voltage comparator I1.When safety power supply winding L4 and welding cable during not with input power supply phase line joint, therefore the dividing point of importing the power supply primary circuit is connected with secondary control circuit negative pole and is equipotential, the dividing point of input power supply primary side does not have electric current to produce, so the two ends of the adjustable divider resistance R9 on the in-phase input end of voltage comparator I1 do not have pressure drop, current potential to equate, the in-phase input end of voltage comparator I1 and the negative pole current potential of secondary control circuit equate and are lower than the reverse input end B of voltage comparator I1.Therefore the output of voltage comparator is a low level, relay J 1 in the secondary control circuit can not moved, when any end of safety power supply winding L4 and any end of source of welding current circuit, the output loop of welding cable and safety power supply, barrier is connected with input power supply phase line for some reason, the two ends of safety power supply all produce potential difference with the dividing point of primary power source input circuit, carry out current limliting by sample resistance R10, carry out rectification through commutation diode D3, obtain a positive voltage signal, and carry out current limliting once more through current-limiting resistance R8, adjustable divider resistance R9 dividing potential drop through the input in the same way of voltage comparator I1, obtain a positive comparative voltage of about 3 volts, comparative voltage is higher than from the reverse input end B that sets, make the output of voltage comparator I1 under pull-up resistor R5 effect, be high level, this current potential is through diode D2 and through current-limiting resistance R3, divider resistance R4 dividing potential drop, make triode BG3 base stage obtain operating voltage, relay J 1 adhesive, the long closed contact J1-3 of relay opens main power source contactor coil circuit, coil losing electricity discharges, main power source contactor CJ1 normally opened contact CJ1-1 and CJ1-2 disconnect, the main power transformer primary side loses voltage, the normally opened contact J1-1 closure of while relay J 1, malfunction indicator lamp ZD1-1 gets electric, makes indicating fault.Relay normally open contact J1-2 closure makes the relay coil self-insurance.This self protective function, be for preventing, hinder for some reason and the electrical equipment that produces connects the frequent disconnection and the detection that cause because of the output loop of main power transformer primary side to safety power supply circuit, source of welding current circuit, welding cable and safety power supply, at this moment answer powered-down, pending fault restarts after getting rid of.In addition because the driving triode BG2 of the driving triode BG3 of the self check indicator lamp ZD1-2 of this electric welding machine and the relay J 1 control utmost point is to be connected in parallel on same end, after relay driving triode BG2 receives signal, when cutting off main power source, to the relay coil self-insurance, the primary side of main power transformer B1 and secondary side do not have the existence of current potential by the normally opened contact J1-2 of relay J 1.If because the inside of electric welding machine to the output loop electric leakage of safety power supply circuit, source of welding current circuit, welding cable and safety power supply, this moment voltage comparator I1, because of there not being power supply will lose the electric leakage sampled signal, self check malfunction indicator lamp ZD-1 loses the driving signal simultaneously and extinguishes, to confirm the inner electric leakage of welding machine.If safety power supply circuit extension and source of welding current circuit, miniature movable type electric tool during the output loop of welding cable and safety power supply or miniature movable type electric tool just in use come in contact other electrical body or safety power supply extension and use is former thereby produce leakage failure over the ground because of insulation breakdown or other, once import the dividing point F of power circuit and the input of voltage comparator I1, can produce potential difference, make that the voltage comparator output is a high level, malfunction indicator lamp ZD1-2 and self check malfunction indicator lamp ZD1-1 will make indication, trouble location is judged, or with its power supply cut-out, to guarantee operator's safety.

Claims

1, a kind of electric welding machine that has the Intelligent Measurement loop, it includes the casing of electric welding machine, the input system that is used to introduce welding machine electric power is housed in described casing, the input system of described power supply comprises: the input quick socket of power supply (CZ1), main power switch (K1), main power source contactor (CJ1), main power transformer (B1), the safety locking motion that is equipped with in the loop of main power transformer one side winding (L1), include the source of welding current circuit of charging major circuit components (12) and charging control integrated circuit (13), also be included in main power transformer (B1) secondary and be wound with one group of independent winding (L4) that does not have electrical equipment to connect with the earth and supply network neutral point, be formed for providing the safety power supply circuit of power supply, it is characterized in that for the miniature movable type electric tool:

Also include the Intelligent Measurement loop that the primary side at main power transformer (B1) is equipped with, its Intelligent Measurement loop is connected by the sampled point of sampled point with described safety power supply circuit and source of welding current circuit, safe condition is sampled, compared, and the outside is carried out the various states indication or cut off its electric power system; This Intelligent Measurement loop is to insert switch (K1-1) in normally opened contact (CJ1-1) junction of main power transformer primary side safety locking motion (BX1) end opening and main power source contactor (CJ1), the other end of switch (K1-1) connects control circuit safeties (BX2), one end of the other end Access Control circuit transformer (B2) of safeties (BX2), the other end of control circuit transformer (B2) is received the other end of input power supply primary side, the output of the second siding ring (L6) of control circuit transformer (B2) is connected with control circuit rectifier (ZL1), control circuit rectifier (ZL1) output and control relay (J1), voltage comparator (I1) connects successively, the other end of control relay (J1) coil is connected with the colelctor electrode of triode (BG2), the base stage of triode BG2 is connected with the output of voltage comparator (I1), the in-phase input end of voltage comparator (I1) respectively with divider resistance (R9), sampling current-limiting resistance (R8) is connected with (R38), the negative pole of Intelligent Measurement loop circuit with import power supply primary side main circuit on divider resistance (R1) and the dividing point (F) of (R2) be connected.