CN2848440Y

CN2848440Y - Electric welding machine having safety power source

Info

Publication number: CN2848440Y
Application number: CN 200520122939
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 a safety power source. In a power source input system of the electric welding machine, a group of independent 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 source, and is used for providing a safety power source for a miniature movable type electric tool. The increased windings of the safety power source for the structure are a group of independent windings without electrical equipment to connect with neutral points of the power supply network and the earth ground. In the process of using the miniature movable type electric tool, when an operator is in contact with one end of the safety power source because of the breakage of insulation, etc., the utility model can not generate the shock current which is caused by the potential difference generated by the safety power source passing through a human body and the earth ground so as to have the action of preventing electric shock. Simultaneously, for the accident of earth leakage of the miniature movable type electric tool used by the safety power source or the secondary loop of a welding machine, the utility model can give state indication, and can cut off a power supply circuit of the safety power source. Under the conditions of used electric loop having the accidents of overload or short circuit, etc., a safety device of the safety power source can cut off a power supply loop of the safety power source so as to ensure safety.

Description

The electric welding machine that has safety power supply

Technical field

The utility model relates to a kind of electric welding machine, particularly a kind of electric welding machine that has safety power supply.

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 safety power supply that the utility model provides, for in using the electric welding machine operation, preventing the generation of electric shock accidents, and can satisfy miniature movable type instrument operate as normal, for operating personnel provide safe working environment.

For achieving the above object, the technical solution adopted in the utility model provides a kind of electric welding machine that has safety power supply, 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 first side winding L1 safety locking motion is housed, wherein: the secondary that this electric welding machine also is included in main power transformer B1 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.

The described safety power supply output voltage that provides is alternating current 220V or 380V, and frequency is 50-60HZ.

Effect of the present utility model is that the safety power supply winding that this structure increases is one group of isolated windings that does not have electrical equipment to be connected with the earth and supply network neutral point, when the miniature movable type electric tool in use comes in contact because of reasons such as damage in insulation cause operator and safety power supply one end, and the potential difference that can not cause safety power supply to produce by human body and the earth, and cause the generation of shock current, thereby play the electric shock effect that prevents.The safeties of this safety power supply take place in the electricity consumption loop under the situation of accidents such as overload or short circuit, the current supply circuit of its safety power supply can be cut off, to guarantee safety.The safety power supply that this kind provides for the miniature movable type instrument is the part as the load of this electric welding machine main power transformer primary side; the safeties of the main power transformer primary side of this electric welding machine; also can play the safety assurance effect to it; the safety power supply has double shielding like this; especially when safety power supply when the safeties of native system break down; simultaneously two produce body leakage with electric wire; or because of safety power supply outlet side transships, this electric welding machine can also play the effect that prevents fire.

Description of drawings

Fig. 1 is the main circuit schematic diagram of the utility model electric welding machine.

The specific embodiment

Reaching embodiment in conjunction with the accompanying drawings is illustrated the electric welding machine that has safety power supply of the present utility model.

As shown in Figure 1, the electric welding machine that has safety power supply of the present utility model is can provide the equipment that AC power is provided that is not electrically connected with the earth and supply network neutral point for the miniature movable type electric tool a kind of having, its output voltage is for exchanging 220 or 380 volts, and frequency is 50 hertz.This has the electric welding machine of safety power supply, 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, the secondary that it also is included in main power transformer B1 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.

The electric welding machine of said structure will be imported the power supply quick plug and be 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, three groups of windings of secondary L2, L3, L4 that main power transformer B1 gets electric B1 produce induced voltage, L2 and L3 obtain operating voltage, are carried out welding job.Simultaneously L4 makes and exchanges 220 or 380 volts induced voltage, and the safeties BX4 by auxiliary winding makes safety power supply export fast and safely socket CZ2 and gets electricly, normally use in order to miniature movable type electrodynamic type instrument.When safety accessory power outlet or serious overload of miniature movable type electric tool or short circuit, the safeties of safety power supply will cut off the out-put supply of independent winding L4.If in a single day the safeties BX4 of independent winding L4 breaks down, and can't play safety effect the time, the improper electric current of independent winding L4, can cause the surge of main power transformer B1 primary side current, the safeties of main power transformer B1 primary side will cut off whole power supply, and this will suppress the fire incident that causes because of main power transformer secondary side independent winding L4 overload effectively.

This its safety power supply lead-out wire of electric welding machine that has a safety power supply in use, because of national standard does not allow to use for a long time portable terminal plate, and this electric welding machine safety power supply line length is unrestricted, can satisfy the condition of work of various movable electric tools very easily.

Claims

1, a kind of electric welding machine that has safety power supply, 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), in the loop of the first side winding (L1) of main power transformer (B1), safety locking motion is housed, it is characterized in that:

The secondary that this electric welding machine also is included in described main power transformer (B1) 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.

2, the electric welding machine that has safety power supply according to claim 1 is characterized in that: the described safety power supply output voltage that provides is alternating current 220V or 380V, and frequency is 50-60HZ.