CN2074222U

CN2074222U - Three-phase silicon rectifying dc arc welder

Info

Publication number: CN2074222U
Application number: CN 90216247
Authority: CN
Inventors: 杨占英
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-07-13
Filing date: 1990-07-13
Publication date: 1991-04-03

Abstract

The utility model relates to a three-phase silicon rectifying DC arc welder, comprising a three-phase transformer and a rectifier bridge. The utility model is characterized in that 4-6 resistors are connected in parallel between the inverse output end of the rectifier bridge and each welding tongs. The utility model has the advantages of small installed capacity, stable working current, soft arc starting, no arc bias, simple circuit, low cost, convenient maintenance, etc., being an ideal three-phase DC arc welder.

Description

Three-phase silicon rectifying DC arc welder

The utility model relates to the three-phase arc-welding machine, especially a kind of triphase silicon rectification DC arc welder.

When real work, there are many problems in present triphase silicon rectification DC arc welder, stings iron during as the starting the arc, the operating current that mixes up, the time slightly the farm labourer make electric current and just die down, the time inclined to one side arc phenomenon arranged.In addition because existing triphase silicon rectification DC arc welder circuit structure complexity, cost height, often be out of order, inconvenient maintenance, especially silicone tube burns out easily, this is the silicon rectifier welder most thorny issue.

After the utility model purpose was to provide a kind of welding current to set up, welding was stable, constant arc, arc partially, and a welding machine can have two electrode holders, and circuit structure is simple, the triphase silicon rectification DC arc welder that cost is low.

The utility model technical solution: several resistance in parallel (can be 4 or 5 or 6) between the reverse sending end of three-phase commutation bridge and each soldering turret, these several resistance form a rheostat.

The utility model advantage:

1, this machine input current balance, the welding starting the arc soft weldment of not stinging, operating current is stable, constant arc, arc partially.In addition, the characteristics of this machine maximum are that a welding machine can have the operation simultaneously of two electrode holders.And test: use welding rod φ 0.5～φ 7.0 through reality, power output is the welding machine of 12KW, when specified temporary section rate is 100% and 60%, zone of welding current is respectively (5A～120A) * 2, (5A～155A) * 2 two electrode holder operation simultaneously, can improve power factor 98%, raise the efficiency more than 86%.This machine floating voltage is low, is 50 volts, and 60～80 volts of general welding machines, therefore, installed capacity is little.

2, this machine is compared with similar silicon rectifier electric welding machine, can save copper cash and silicon steel sheet and reach more than 35%, also can save many electrical equipment original papers simultaneously, and fault rate very low (not burning silicone tube substantially) brings convenience for electric personnel's maintenance.

3, this device has not only solved the subject matter that existing triphase silicon rectification welding machine exists, and compares with the welding machine of other type, no matter all accounts for very big advantage at aspects such as structure, cost, economize on electricity, working environments., carbon brush big as: the rotary arc generator noise of three-phase and commutator are easy to wear, and starting current is big, and often because of phase-deficient operation burns out, and there are not the problems referred to above in this device; From the economize on electricity angle, because the circuit structure of this device determines that this machine operation no-load current is little, zero load and operating voltage are low in addition, and therefore, it is compared and can economize on electricity more than 20% than silicon rectifier welder of the same type.

Implement below in conjunction with circuit theory diagrams explanation the utility model the best:

Fig. 1 is the utility model circuit theory diagrams

In the accompanying drawings, ZB transformer, RD fuse, WK temperature-sensitive element, K ₁, K ₂Hand switch, FM fan electromotor, D ₁～D ₆Silicon rectifier diode, BP stablize rheostat, R resistance, 1 soldering turret, 2 ground handles.

In the figure, the corresponding soldering turret of stable rheostat BP, and serial connection one manual K switch between the resistance R in each soldering turret 1 rheostat BP corresponding with it ₂, in actual use by hand switch K ₁, K ₂Can control fan electromotor and welding electric current respectively, and temperature-sensitive element WK can control the startup of fan motor automatically according to variation of temperature.

Claims

1, a kind of triphase silicon rectification DC arc welder that comprises three-phase transformer, rectifier bridge, its feature:

4 or 5 or 6 resistance in parallel between rectifier bridge inverse output terminal and the soldering turret 1.

2, triphase silicon rectification DC arc welder according to claim 1, its feature:

A, rheostat BP can be two, and promptly corresponding with it soldering turret 1 can be two;

B, hand switch K connects between soldering turret 1 and resistance R ₂