CN210937596U - Split type contravariant welding machine - Google Patents

Split type contravariant welding machine Download PDF

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Publication number
CN210937596U
CN210937596U CN201921549488.8U CN201921549488U CN210937596U CN 210937596 U CN210937596 U CN 210937596U CN 201921549488 U CN201921549488 U CN 201921549488U CN 210937596 U CN210937596 U CN 210937596U
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electrically connected
unit
module
welding
output
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CN201921549488.8U
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赵以金
郭秀星
邓长明
耿正
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Zhongshan Jinrui Welding Equipment Co ltd
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Zhongshan Jinrui Welding Equipment Co ltd
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Abstract

The utility model discloses a split type contravariant welding machine, including contravariant module, portable casing, step-down rectifier module and welding assembly sets up on the portable casing, step-down rectifier module's input passes through cable assembly with contravariant module's output electric connection, step-down rectifier module's output with welding assembly electric connection, this design has reduced the whole use cost of contravariant electric welding, has improved electric energy utilization.

Description

Split type contravariant welding machine
Technical Field
The utility model relates to an arc welding equipment field, especially an contravariant welding machine.
Background
The inverter type electric welding machine has a series of advantages of small size, light weight and the like, and becomes the mainstream technology of the existing electric welding machine.
The load of the inverter type electric welding machine is a welding arc, so the output basic characteristics of the inverter type electric welding machine are low voltage and large current, and the characteristics of low voltage and large current mean that the output end of the inverter type electric welding machine needs to use a welding cable with a large cross section area to connect welding workpieces such as a welding gun and the like.
The welding cable is generally made of high-quality pure copper and has high-strength rubber as outer insulation protection, so that the welding cable is heavy in weight and high in cost. If the welding machine is far away from the actual welding station due to the operation field, the lengthened welding cable is needed, the total amount and cost of the welding cable are considerable, and sometimes the weight and cost of the welding cable even exceed those of the inverter type welding machine.
And the lengthening of the welding cable means that the energy loss is greatly increased by passing a large current. In order to reduce the energy loss on the cable, the conventional method further increases the cross-sectional area of the welding cable, however, the total amount and cost of the welding cable are further increased; alternatively, the output voltage of the welding bug may be increased to compensate for the voltage drop across the extended weld cable, but this does not substantially reduce the energy loss of the weld cable and also increases the manufacturing cost of the welding bug.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a split type contravariant welding machine, transmit high voltage, low-current part with the cable subassembly, reduce extension welding cable energy loss and manufacturing cost, improve portability and work efficiency.
The utility model adopts the technical proposal that:
the utility model provides a split type contravariant welding machine, includes contravariant module, portable casing, step-down rectifier module and welding assembly sets up on the portable casing, step-down rectifier module's input passes through cable assembly with the output electric connection of contravariant module, step-down rectifier module's output with welding assembly electric connection.
The cable assembly is a coaxial cable.
The coaxial cable comprises a central line group, a braided copper wire layer and an outer insulating layer which are arranged from inside to outside.
The central line group is formed by a plurality of strands of enameled wires.
The conductive sectional area of the braided copper wire layer is equal to the conductive sectional area of the multi-strand enameled wire.
The inversion module comprises a first rectification unit and an inversion unit, wherein the input end of the first rectification unit can be electrically connected with an external alternating current power supply, the input end of the inversion unit is electrically connected with the output end of the first rectification unit, and the output end of the inversion unit is electrically connected with the cable assembly.
The voltage-reducing rectification module comprises a voltage-reducing unit, a second rectification unit and an output filtering unit, wherein the input end of the voltage-reducing unit is electrically connected with the cable assembly, the input end of the second rectification unit is electrically connected with the output end of the voltage-reducing unit, the output end of the second rectification unit is electrically connected with the input end of the output filtering unit, and the output end of the output filtering unit is electrically connected with the welding assembly.
The voltage reduction unit comprises a transformer T1, the second rectification unit comprises a diode D1 and a diode D2, the output filter unit comprises a filter inductor L0, two ends of a primary coil of the transformer T1 are electrically connected with the cable assembly, a secondary coil of the transformer T1 is provided with a center tap, one end of the secondary coil of the transformer T1 is electrically connected with the anode of the diode D1, the other end of the secondary coil of the transformer T1 is electrically connected with the anode of the diode D2,
the cathode of the diode D1 is electrically connected to the cathode of the diode D2 and one end of the filter inductor L0, respectively, the other end of the filter inductor L0 is electrically connected to one pole of the welding assembly, and the center tap of the secondary coil of the transformer T1 is electrically connected to the other pole of the welding assembly.
The inverter module outputs a medium-frequency power supply of 20KHz to 80 KHz.
One of the above technical solutions has at least one of the following advantages or beneficial effects:
the split type inverter welding machine of the utility model is composed of an inverter module and a voltage reduction rectifier module, and the inverter module is separated from the voltage reduction rectifier module, the inverter module has large volume and weight, outputs high voltage and low current, when in use, the inverter module can be fixed at a certain position and is connected with an external power grid, the voltage reduction rectification module and the welding component are arranged on a movable shell, the voltage reduction rectification module is connected with the inversion module through a cable component, the movable shell can be moved to a welding station, the voltage reduction rectification module is not provided with components such as a control circuit and the like, the size is small, the movement is convenient, the reliability in the moving and using process is high, and high voltage and low current are transmitted in the cable assembly, long-distance transmission loss is low, and a lead with a small sectional area can be used in the cable assembly, so that the overall use cost of the inverter welding machine is reduced, and the electric energy utilization rate is improved.
Drawings
The following description will further describe embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic circuit structure diagram of the split inverter welding machine of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
As shown in fig. 1, a split inverter welding machine includes an inverter module 100, a movable housing (not shown), a step-down rectifier module 200 and a welding assembly 400, wherein the step-down rectifier module 200 and the welding assembly 400 are disposed on the movable housing, an input end of the step-down rectifier module 200 is electrically connected to an output end of the inverter module 100 through a cable assembly 300, and an output end of the step-down rectifier module 200 is electrically connected to the welding assembly 400.
The movable shell is a shell for placing the step-down rectification module 200 and the welding assembly 400, and the movable shell is not limited to a specific shape and is convenient for a user to move and operate; the welding assembly 400 comprises a welding torch 401, the welding assembly 400 is connected with the output end of the step-down rectifier module 200 through a welding cable 500, and the welding torch 401 acts on a welding workpiece 404 through a welding rod 402 and a welding arc 403;
in some embodiments, the inverter module 100 includes a first rectifying unit 101 and an inverter unit 102, an input end of the first rectifying unit 101 is electrically connected to an external ac power source, an input end of the inverter unit 102 is electrically connected to an output end of the first rectifying unit 101, and an output end of the inverter unit 102 is electrically connected to the cable assembly 300.
The first rectifying unit 101 is composed of a diode D7, a diode D8, a diode D9 and a diode D10, rectifies an external alternating current power supply, filters the rectified alternating current power supply through a capacitor C1, and inputs the filtered alternating current power supply into the inverter unit 102, the inverter unit 102 can be composed of four IGBT components, the IGBT components can be connected with an external control circuit, the IGBT components are controlled to be switched on and off by the control circuit to drive the inverter unit to operate, and high-voltage and low-current alternating current power is output, and in some embodiments, the inverter module outputs a 100 KHz-80KHz intermediate frequency power supply.
In some embodiments, the buck rectifier module 200 includes a buck unit 201, a second rectifier unit 202, and an output filter unit 203, wherein an input terminal of the buck unit 201 is electrically connected to the cable assembly 300, an input terminal of the second rectifier unit 202 is electrically connected to an output terminal of the buck unit 201, an output terminal of the second rectifier unit 202 is electrically connected to an input terminal of the output filter unit 203, and an output terminal of the output filter unit 203 is electrically connected to the welding assembly 400.
The voltage reduction unit 201 comprises a transformer T1, the second rectification unit 202 comprises a diode D1 and a diode D2, the output filter unit 203 comprises a filter inductor L0, two ends of a primary coil of the transformer T1 are electrically connected with the cable assembly 300, a secondary coil of the transformer T1 is provided with a center tap, one end of a secondary coil of the transformer T1 is electrically connected with an anode of the diode D1, the other end of the secondary coil of the transformer T1 is electrically connected with an anode of the diode D2,
the cathode of the diode D1 is electrically connected to the cathode of the diode D2 and one end of the filter inductor L0, respectively, the other end of the filter inductor L0 is electrically connected to one pole of the welding assembly 400, and the center tap of the secondary coil of the transformer T1 is electrically connected to the other pole of the welding assembly 400.
The design is composed of an inversion module 100 and a voltage-reducing rectification module 200, and separates the inversion module 100 from the voltage-reducing rectification module 200, the inversion module 100 is generally large in size and weight and outputs high voltage and low current, when in use, the inversion module 100 can be fixedly arranged at a certain position and is connected with an external power grid, the voltage-reducing rectification module 200 and a welding assembly 400 are arranged on a movable shell, the voltage-reducing rectification module 200 is connected with the inversion module 100 through a cable assembly 300, the movable shell can be moved to a welding station, no control circuit and other components are arranged on the voltage-reducing rectification module 200, the size is small, the reliability of the movement and the use process is high, the cable assembly 300 transmits high voltage and low current, the long-distance transmission loss is low, a lead with a small sectional area can be used in the cable assembly 300, and the whole use cost of the inversion electric welding machine is, the electric energy utilization rate is improved.
In some embodiments, the cable assembly may be coaxial cable, and further, high power intermediate frequency coaxial cable may be used.
The working frequency of the high-power intermediate-frequency coaxial cable is low and is between 20KHz and 80KHz, and the high-power intermediate-frequency coaxial cable is matched with an output power supply of the inverter unit, so that the problem of loss of a dielectric material is basically not considered; and the working current is large and can reach dozens of amperes.
The coaxial cable comprises a central line group, a braided copper wire layer and an outer insulating layer which are arranged from inside to outside.
The central line group is composed of a plurality of strands of enameled wires, the plurality of strands of enameled wires are made of the same material as the primary coil of the transformer, the conductive sectional area of the braided copper wire layer is equal to the sum of the conductive sectional areas of the plurality of strands of enameled wires, and the cost and the weight of the cable assembly are reduced.
In some embodiments, if the welding voltage of the welding assembly is 20-40V, calculated as 30V which is a common intermediate value, the output amplitude of the inverter module is equal to 300V relative to the dc input voltage of the inverter module, and is also 300V, according to the principle of power equality, 300 × I1 is 30 × I2, I1 is I2/10, that is, 1/10 of only welding current I2 passes through I1 in the cable assembly;
thus, the effective cross-sectional area in the cable assembly 300 may be only 1/10 for the weld cable 500; for example, for a welding current of 200A, a load duration of 60%, a cross-sectional area of 2-2.5 square millimeters may be selected for the cable assembly for conductive transmission.
In addition, 20KHz-80KHz intermediate frequency current is transmitted by the cable assembly, although the voltage is 300V or higher, the personal safety is very high due to the skin effect, namely the 20KHz-80KHz intermediate frequency current can not be concentrated on the surface of a human body, and is quickly attenuated along with the increase of the depth of entering the skin, so that the safety is high.
It is readily understood by those skilled in the art that the above-described preferred modes can be freely combined and superimposed without conflict.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (9)

1. The utility model provides a split type contravariant welding machine, its characterized in that, includes contravariant module, portable casing, step-down rectifier module and welding assembly sets up on the portable casing, step-down rectifier module's input pass through cable assembly with contravariant module's output electric connection, step-down rectifier module's output with welding assembly electric connection.
2. The split inverter welder according to claim 1, wherein: the cable assembly is a coaxial cable.
3. The split inverter welder according to claim 2, wherein: the coaxial cable comprises a central line group, a braided copper wire layer and an outer insulating layer which are arranged from inside to outside.
4. The split inverter welder according to claim 3, wherein: the central line group is formed by a plurality of strands of enameled wires.
5. The split inverter welder according to claim 4, wherein: the conductive sectional area of the braided copper wire layer is equal to the sum of the conductive sectional areas of the multiple strands of enameled wires.
6. The split inverter welder according to claim 1, wherein: the inversion module comprises a first rectification unit and an inversion unit, wherein the input end of the first rectification unit can be electrically connected with an external alternating current power supply, the input end of the inversion unit is electrically connected with the output end of the first rectification unit, and the output end of the inversion unit is electrically connected with the cable assembly.
7. The split inverter welder according to claim 1, wherein: the voltage-reducing rectification module comprises a voltage-reducing unit, a second rectification unit and an output filtering unit, wherein the input end of the voltage-reducing unit is electrically connected with the cable assembly, the input end of the second rectification unit is electrically connected with the output end of the voltage-reducing unit, the output end of the second rectification unit is electrically connected with the input end of the output filtering unit, and the output end of the output filtering unit is electrically connected with the welding assembly.
8. The split inverter welder according to claim 7, wherein: the voltage reduction unit comprises a transformer T1, the second rectification unit comprises a diode D1 and a diode D2, the output filter unit comprises a filter inductor L0, two ends of a primary coil of the transformer T1 are electrically connected with the cable assembly, a secondary coil of the transformer T1 is provided with a center tap, one end of the secondary coil of the transformer T1 is electrically connected with the anode of the diode D1, the other end of the secondary coil of the transformer T1 is electrically connected with the anode of the diode D2,
the cathode of the diode D1 is electrically connected to the cathode of the diode D2 and one end of the filter inductor L0, respectively, the other end of the filter inductor L0 is electrically connected to one pole of the welding assembly, and the center tap of the secondary coil of the transformer T1 is electrically connected to the other pole of the welding assembly.
9. The split inverter welder according to claim 1, wherein: the inverter module outputs a medium-frequency power supply of 20KHz to 80 KHz.
CN201921549488.8U 2019-09-17 2019-09-17 Split type contravariant welding machine Active CN210937596U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921549488.8U CN210937596U (en) 2019-09-17 2019-09-17 Split type contravariant welding machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921549488.8U CN210937596U (en) 2019-09-17 2019-09-17 Split type contravariant welding machine

Publications (1)

Publication Number Publication Date
CN210937596U true CN210937596U (en) 2020-07-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921549488.8U Active CN210937596U (en) 2019-09-17 2019-09-17 Split type contravariant welding machine

Country Status (1)

Country Link
CN (1) CN210937596U (en)

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