CN114178654A - Welding circuit and portable adjustable impulse welding machine - Google Patents

Welding circuit and portable adjustable impulse welding machine Download PDF

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Publication number
CN114178654A
CN114178654A CN202111592791.8A CN202111592791A CN114178654A CN 114178654 A CN114178654 A CN 114178654A CN 202111592791 A CN202111592791 A CN 202111592791A CN 114178654 A CN114178654 A CN 114178654A
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energy storage
storage module
welding
thermocouple
normally open
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CN202111592791.8A
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CN114178654B (en
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何灿阳
韩群霞
毕景良
郗昭
昝元锋
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Nuclear Power Institute of China
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Nuclear Power Institute of China
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/10—Other electric circuits therefor; Protective circuits; Remote controls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Protection Of Static Devices (AREA)

Abstract

The invention discloses a welding circuit and a portable adjustable impulse welding machine, wherein the welding circuit comprises a control module and an energy storage module with adjustable electric energy value, the control module controls the working state of the energy storage module, and the working state comprises a charging state and a discharging state; when the energy storage module is in a discharging state, the electric energy released by the energy storage module welds the object to be welded to the surface to be welded; the energy storage module comprises a plurality of discharging branches, the discharging branches are connected in parallel, the discharging branches have the same structure and comprise capacitors and switches which are connected in series. The invention aims to provide a welding circuit and a portable adjustable impact welding machine, which not only can ensure that the end of a thermocouple is reliably connected with the surface of a measured metal, but also can avoid the thermocouple from being damaged due to welding.

Description

Welding circuit and portable adjustable impulse welding machine
Technical Field
The invention relates to the technical field of thermotechnical measuring instruments, in particular to a welding circuit and a portable adjustable impact welding machine.
Background
In experimental research, it is often necessary to measure the multi-point temperature on a metal surface, how to reliably fix the thermocouple and make the thermocouple fully contact the metal surface, and it is the key for accurate temperature measurement to reduce the influence of the thermocouple on the surface temperature field as much as possible.
The common thermocouple surface fixing methods include: surface welding, sheet metal crimping, clamp fixing or gluing thin film thermocouples, and the like. The surface welding is to embed a thermocouple into a preset hole or the surface of a measured point and then perform welding fixation through silver brazing, and the thermocouple can be reliably fixed in the way and can be fully contacted with the metal surface, but the thermocouple is often damaged due to improper welding temperature control, and meanwhile, the surface area occupied by welding is large, and certain influence is exerted on a temperature field; the metal sheet is pressed under the stainless steel sheet, the point of a copper column of a spot welding machine discharges, the metal sheet is locally spot-welded on the surface of equipment, and the thermocouple can be reliably fixed through multi-point welding, so that the thermocouple cannot be damaged and can be reliably fixed, but the thermocouple cannot be fully contacted with the surface, and the metal sheet has a large influence on the surface temperature field; the clamp fixing mode is suitable for measuring the surface temperature of the pipeline, and is not suitable for large experimental bodies, particularly bodies with complex structures; the adhesive film thermocouple cannot be used at a higher temperature due to the influence of glue, and the temperature field is influenced by a larger bonding area.
Disclosure of Invention
The invention aims to provide a welding circuit and a portable adjustable impact welding machine, which not only can ensure that the end of a thermocouple is reliably connected with the surface of a measured metal, but also can avoid the thermocouple from being damaged due to welding.
The invention is realized by the following technical scheme:
in one aspect of the application, a welding circuit is provided, comprising a control module and an energy storage module with adjustable electric energy value, wherein the control module controls the working state of the energy storage module, and the working state comprises a charging state and a discharging state; when the energy storage module is in a discharging state, the electric energy released by the energy storage module welds the object to be welded to the surface to be welded;
the energy storage module comprises a plurality of discharging branches, the discharging branches are connected in parallel, the discharging branches have the same structure and comprise capacitors and switches which are connected in series.
In the nuclear power thermal measurement instrument test, the multi-point temperature on a metal surface is often required to be measured, and the measurement mode is common at present by fixing a plurality of thermocouples on the metal surface. How to reliably fix the thermocouple and make the thermocouple fully contact the metal surface, and simultaneously, reducing the influence of the thermocouple on the surface temperature field as much as possible is the key of accurate temperature measurement.
The thermocouple surface fixing modes commonly used at present are as follows: surface welding, sheet metal crimping, clamp fixing or gluing thin film thermocouples, and the like. The surface welding is to embed a thermocouple into a preset hole or the surface of a measured point and then perform welding fixation through silver brazing, and the thermocouple can be reliably fixed and can be fully contacted with the metal surface, but the thermocouple is often damaged due to improper welding temperature control, and meanwhile, the surface area occupied by welding is large, and certain influence is exerted on a temperature field; the metal sheet is pressed under the stainless steel sheet, the point of a copper column of a spot welding machine discharges, the metal sheet is locally spot-welded on the surface of equipment, and the thermocouple can be reliably fixed through multi-point welding, so that the thermocouple cannot be damaged and can be reliably fixed, but the thermocouple cannot be fully contacted with the surface, and the metal sheet has a large influence on the surface temperature field; the clamp fixing mode is suitable for measuring the surface temperature of the pipeline, and is not suitable for large experimental bodies, particularly bodies with complex structures; the adhesive film thermocouple cannot be used at a higher temperature due to the influence of glue, and the temperature field is influenced by a larger bonding area. Based on this, the present application provides a new welding circuit, including energy storage module with adjustable energy storage value, because the energy that energy storage module stored is adjustable, namely: the discharge energy during welding can be adjusted, so that the discharge energy of the energy storage module can be reasonably adjusted according to the thickness of the thermocouple to be welded and the temperature measurement surface smoothness, the thermocouple can be prevented from falling off easily after being welded with the metal surface due to too small discharge energy during welding, and the thermocouple can be prevented from being damaged after being welded due to too large discharge energy. Specifically, the energy storage module in this embodiment includes many branch circuits that discharge, and the branch circuits that discharge are parallelly connected and the structure of branch circuits that discharge is the same, all includes electric capacity and the switch of establishing ties, consequently, through arranging the combination to the switch of branch circuits that discharge, selects the electric capacity of reasonable quantity can be used for controlling discharge current's size to reach best welding effect.
Preferably, in order to ensure that the energy storage module is not charged when discharging; when the energy storage module is charged, no voltage is output from the output end of the energy storage module, so that the personal safety of a user is ensured. The control module in the scheme comprises a power switch, a normally open self-reset switch, a normally closed self-reset switch and a relay with three normally open nodes and one normally closed node;
the power switch, the normally open self-reset switch, the normally closed self-reset switch and the relay are connected in series to form a closed loop, the input end of the energy storage module is connected in parallel to two ends of the power switch, and the normally open node KA of the relay-1The normally-open nodes KA of the relay are arranged at two ends of the normally-open self-reset switch in parallel-2Normally open node KA-3The series connection is arranged at the input end of the energy storage module, and the normally closed node KA of the relay-4The energy storage module is connected in series with the output end of the energy storage module.
According to the scheme, the self-reset charging button is specially arranged during charging, so that the energy storage module can be prevented from being directly charged after the control module is connected with a power supply. Through adopting a normally open from reset switch (charge button) SB1, a normally closed from reset switch (discharge button) SB2 and a relay KA of taking three normally closed contact of normally open contact, realized pressing charge button SB1 after, the normally open contact automatic closure of relay, normally closed contact automatic disconnection, control module charges for energy storage module automatically, automatic shutdown after charging the charging voltage that the potentiometre set for, in the charging process, because normally closed contact disconnection, energy storage module's output is uncharged, can ensure user's personal safety. When the discharge button SB2 is pressed, the normally open contact of the relay is automatically opened, the normally closed contact is automatically closed, the control module is disconnected with the energy storage module, the energy storage module outputs energy instantly, and the energy can instantly melt the thermocouple end and the contact surface part because the contact resistance of the thermocouple end and the welded surface is larger, so that the thermocouple is welded to the metal surface.
Preferably, the control module further includes a boost rectifier, an input end of the boost rectifier is connected in parallel to the two ends of the power switch, and a first output port of the boost rectifier and the normally open node KA-2Connected, the second output port of the boost rectifier and the normally open node KA-3And (4) connecting.
Because the capacitor has the characteristic of passing alternating current and direct current, when the energy storage module is charged, only direct current acts on the energy storage module, and the commonly used commercial power is 220V alternating current, so that a rectifier is further arranged in the embodiment to convert the commercial power into direct current in order to facilitate a user to use the welding circuit; meanwhile, considering the problem that the voltage of 220V is small and the object to be welded is a thick thermocouple, iron, nickel, copper, stainless steel and other metals and is easy to fall off, the rectifier in the embodiment is a boost rectifier, and the voltage is boosted while the rectifier rectifies.
Preferably, the boost rectifier further comprises an adjustable potentiometer, a first fixed contact of the adjustable potentiometer is connected with the first output port of the boost rectifier, and a second fixed contact of the adjustable potentiometer is connected with the second output port of the boost rectifier and the normally-open node KA-3The movable contact of the adjustable potentiometer is connected with the normally open node KA-2And (4) connecting.
In the scheme, the charging voltage acting on the energy storage module can be linearly adjusted by arranging the adjustable potentiometer, so that a user can further reasonably adjust the discharging voltage of the energy storage module according to the thickness of an object to be welded and the temperature measurement surface smoothness. Compared with the method that the output current of the energy storage module is adjusted only by controlling the number of the charged and discharged capacitors, after the adjustable potentiometer is added, the output current of the energy storage module has a larger adjustment range, and the application scene is wider. Preferably, a digital voltmeter can be connected in parallel to the energy storage module to display the voltage of the current energy storage module.
Preferably, the safety device further comprises a safety tube 1FU, and the safety tube 1FU is arranged in the control module in series.
Preferably, the boost rectifier further comprises a fuse 2FU, and the fuse 2FU is arranged at the input end of the boost rectifier in series.
In this scheme, through setting up protective tube 1FU and protective tube 2FU, can avoid when certain return circuit appears the short circuit, damage the electronic component in the circuit.
Preferably, the control module further includes an isolation transformer, the power switch is disposed on a primary side of the isolation transformer, and the normally open self-reset switch, the normally closed self-reset switch, the relay, the fuse 1FU and the boost rectifier are disposed on a secondary side of the isolation transformer.
In the scheme, the fuse can be prevented from being burnt when the discharge wire is grounded by arranging the isolation transformer.
Preferably, the object to be welded is a thermocouple.
In a second aspect of the present application, the present application provides a portable adjustable impact welder, comprising a housing and a welding rod, wherein a welding circuit as described above is provided in the housing, and the output end of the energy storage module is electrically connected to the welding rod.
Preferably, the welding rod is provided as a copper cylinder.
Compared with the prior art, the invention has the following advantages and beneficial effects:
because the energy stored by the energy storage module is adjustable, namely: the discharge energy during welding can be adjusted, so that the discharge energy of the energy storage module can be reasonably adjusted according to the thickness of the thermocouple to be welded and the temperature measurement surface smoothness, the thermocouple can be prevented from falling off easily after being welded with the metal surface due to too small discharge energy during welding, and the thermocouple can be prevented from being damaged after being welded due to too large discharge energy.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram of a bonding circuit according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
The embodiment provides a welding circuit, as shown in fig. 1, which includes a control module and an energy storage module with an adjustable electric energy value, where the control module controls working states of the energy storage module, where the working states include a charging state and a discharging state; when the energy storage module is in a discharging state, the electric energy released by the energy storage module welds the object to be welded to the surface to be welded;
the energy storage module comprises a plurality of discharging branches, the discharging branches are connected in parallel and have the same structure, and each discharging branch comprises a capacitor and a switch which are connected in series, as shown in fig. 1.
In the nuclear power thermal measurement instrument test, the multi-point temperature on a metal surface is often required to be measured, and the measurement mode is common at present by fixing a plurality of thermocouples on the metal surface. How to reliably fix the thermocouple and make the thermocouple fully contact the metal surface, and simultaneously, reducing the influence of the thermocouple on the surface temperature field as much as possible is the key of accurate temperature measurement.
The thermocouple surface fixing modes commonly used at present are as follows: surface welding, sheet metal crimping, clamp fixing or gluing thin film thermocouples, and the like. The surface welding is to embed a thermocouple into a preset hole or the surface of a measured point and then perform welding fixation through silver brazing, and the thermocouple can be reliably fixed and can be fully contacted with the metal surface, but the thermocouple is often damaged due to improper welding temperature control, and meanwhile, the surface area occupied by welding is large, and certain influence is exerted on a temperature field; the metal sheet is pressed under the stainless steel sheet, the point of a copper column of a spot welding machine discharges, the metal sheet is locally spot-welded on the surface of equipment, and the thermocouple can be reliably fixed through multi-point welding, so that the thermocouple cannot be damaged and can be reliably fixed, but the thermocouple cannot be fully contacted with the surface, and the metal sheet has a large influence on the surface temperature field; the clamp fixing mode is suitable for measuring the surface temperature of the pipeline, and is not suitable for large experimental bodies, particularly bodies with complex structures; the adhesive film thermocouple cannot be used at a higher temperature due to the influence of glue, and the temperature field is influenced by a larger bonding area. Based on this, the present embodiment provides a new welding circuit, which includes an energy storage module with adjustable energy storage value, since the energy stored by the energy storage module is adjustable, that is: the discharge energy during welding can be adjusted, so that the discharge energy of the energy storage module can be reasonably adjusted according to the thickness of the thermocouple to be welded and the temperature measurement surface smoothness, the thermocouple can be prevented from falling off easily after being welded with the metal surface due to too small discharge energy during welding, and the thermocouple can be prevented from being damaged after being welded due to too large discharge energy. Specifically, the energy storage module in this embodiment includes many branch circuits that discharge, and the branch circuits that discharge are parallelly connected and the structure of branch circuits that discharge is the same, all includes electric capacity and the switch of establishing ties, consequently, through arranging the combination to the switch of branch circuits that discharge, selects the electric capacity of reasonable quantity can be used for controlling discharge current's size to reach best welding effect.
Furthermore, in order to ensure that the energy storage module is not charged by the control module when the energy storage module is discharged; when the energy storage module is charged, no voltage is output from the output end of the energy storage module, so that the personal safety of a user is ensured. The control module in the scheme comprises a power switch SA0, a normally open self-reset switch SB1, a normally closed self-reset switch SB2 and a relay KA with three normally open nodes and one normally closed node;
the power switch SA0, the normally open self-reset switch SB1, the normally closed self-reset switch SB2 and the relay KA are connected in series to form a closed loop,the input ends of the energy storage modules are connected in parallel at two ends of a power switch SA0, and a normally open node KA of the relay-1The normally-open nodes KA of the relay KA are arranged at two ends of the normally-open self-reset switch SB1 in parallel-2Normally open node KA-3The normally closed node KA of the relay KA is arranged at the input end of the energy storage module in series-4The series connection is arranged at the output end of the energy storage module.
This scheme is through adopting a normally open from reset switch (charge button) SB1, a normally closed from reset switch (discharge button) SB2 and a relay KA of taking three normally open contact normally closed contact, realized pressing charge button SB1 back, the normally open contact (KA) of relay KA-1、KA-2、KA-3) Self-closing, normally closed contact (KA)-4) The automatic disconnection, the control module automatically charges the energy storage module, and the control module automatically stops when the charging voltage set by the potentiometer is charged; during the charging process, due to the normally closed contact (KA)-4) And when the energy storage module is disconnected, the output end of the energy storage module is not electrified, so that the personal safety of a user can be ensured. When the discharging button SB2 is pressed, the normally open contact (KA) of the relay KA-1、KA-2、KA-3) Automatic opening, normally closed contact (KA)-4) The thermocouple welding device is automatically closed, the control module is disconnected with the energy storage module, the energy storage module outputs energy instantly, and the thermocouple end and the contact surface are partially melted instantly by the energy due to the fact that the contact resistance of the thermocouple end and the welded surface is large, so that the thermocouple is welded to the metal surface.
Further, the control module in this embodiment further includes a boost rectifier VT, an input end of the boost rectifier VT is disposed at two ends of the power switch SA0 in parallel, and a first output port of the boost rectifier VT and the normally open node KA-2A second output port of the boost rectifier VT and a normally open node KA are connected-3And (4) connecting.
Because the capacitor has the characteristic of passing alternating current and direct current, when the energy storage module is charged, only direct current acts on the energy storage module, and the commonly used commercial power is 220V alternating current, so that a rectifier is further arranged in the embodiment to convert the commercial power into direct current in order to facilitate a user to use the welding circuit; meanwhile, considering the problem that the voltage of 220V is small and the object to be welded is a thick thermocouple, iron, nickel, copper, stainless steel and other metals and is easy to fall off, the rectifier in the embodiment is set as a boost rectifier VT, and the voltage is boosted while the rectifier rectifies.
Further, the control module in this embodiment further includes an adjustable potentiometer Rp, a first fixed contact of the adjustable potentiometer Rp is connected to the first output port of the boost rectifier, and a second fixed contact of the adjustable potentiometer Rp is connected to the second output port of the boost rectifier and the normally open node KA-3Movable contact and normally open node KA of adjustable potentiometer Rp-2And (4) connecting.
In the scheme, the charging voltage acting on the energy storage module can be linearly adjusted by arranging the adjustable potentiometer Rp, so that a user can further reasonably adjust the discharging voltage of the energy storage module according to the thickness of an object to be welded and the smoothness of the temperature measurement surface. Compared with the method that the output current of the energy storage module is adjusted only by controlling the number of the charged and discharged capacitors, after the adjustable potentiometer Rp is added, the output current of the energy storage module has a larger adjustment range, and the application scene is wider. Preferably, a digital voltmeter SV can be further arranged in parallel on the energy storage module to display the voltage of the current energy storage module, so that a user can know the discharge voltage of the current energy storage module conveniently.
Further, in order to avoid damaging electronic components in a circuit when a short circuit occurs in a certain loop (the control module and/or the energy storage module), the embodiment further includes a fuse 1FU and a fuse 2FU, the fuse 1FU is arranged in the control module in series, and the fuse 2FU is arranged at the input end of the boost rectifier in series.
Further, the control module further comprises an isolation transformer T1, the power switch SA0 is disposed on the primary side of the isolation transformer T1, and the normally open self-reset switch SB1, the normally closed self-reset switch SB2, the relay KA, the protective tube 1FU and the boost rectifier VT are disposed on the secondary side of the isolation transformer T1.
In this scheme, through setting up isolation transformer T1, when can avoiding energy storage module's output ground connection, burn out the protective tube.
Further, the objects to be welded in the present embodiment are provided as thermocouples.
Example 2
The embodiment provides a portable adjustable impact welder, which comprises a shell and a welding rod, wherein a welding circuit provided in embodiment 1 is arranged in the shell, and the output end of an energy storage module is electrically connected with the welding rod.
Further, the welding rod in this embodiment is configured as a copper cylinder.
In the nuclear power thermal measurement instrument test, the multi-point temperature on a metal surface is often required to be measured, and the measurement mode is common at present by fixing a plurality of thermocouples on the metal surface. How to reliably fix the thermocouple and make the thermocouple fully contact the metal surface, and simultaneously, reducing the influence of the thermocouple on the surface temperature field as much as possible is the key of accurate temperature measurement.
The thermocouple surface fixing modes commonly used at present are as follows: surface welding, sheet metal crimping, clamp fixing or gluing thin film thermocouples, and the like. The surface welding is to embed a thermocouple into a preset hole or the surface of a measured point and then perform welding fixation through silver brazing, and the thermocouple can be reliably fixed and can be fully contacted with the metal surface, but the thermocouple is often damaged due to improper welding temperature control, and meanwhile, the surface area occupied by welding is large, and certain influence is exerted on a temperature field; the metal sheet is pressed under the stainless steel sheet, the point of a copper column of a spot welding machine discharges, the metal sheet is locally spot-welded on the surface of equipment, and the thermocouple can be reliably fixed through multi-point welding, so that the thermocouple cannot be damaged and can be reliably fixed, but the thermocouple cannot be fully contacted with the surface, and the metal sheet has a large influence on the surface temperature field; the clamp fixing mode is suitable for measuring the surface temperature of the pipeline, and is not suitable for large experimental bodies, particularly bodies with complex structures; the adhesive film thermocouple cannot be used at a higher temperature due to the influence of glue, and the temperature field is influenced by a larger bonding area. Based on this, this embodiment provides a portable adjustable impact welder, including the energy storage module that the energy storage value is adjustable, because the energy that the energy storage module stored is adjustable, promptly: the discharge energy during welding can be adjusted, so that the discharge energy of the energy storage module can be reasonably adjusted according to the thickness of the thermocouple to be welded and the temperature measurement surface smoothness, the thermocouple can be prevented from falling off easily after being welded with the metal surface due to too small discharge energy during welding, and the thermocouple can be prevented from being damaged after being welded due to too large discharge energy. Specifically, the energy storage module in this embodiment includes many branch circuits that discharge, and the branch circuits that discharge are parallelly connected and the structure of branch circuits that discharge is the same, all includes electric capacity and the switch of establishing ties, consequently, through arranging the combination to the switch of branch circuits that discharge, selects the electric capacity of reasonable quantity can be used for controlling discharge current's size to reach best welding effect.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A welding circuit is characterized by comprising a control module and an energy storage module with adjustable electric energy value, wherein the control module controls the working state of the energy storage module, and the working state comprises a charging state and a discharging state; when the energy storage module is in a discharging state, the electric energy released by the energy storage module welds the object to be welded to the surface to be welded;
the energy storage module comprises a plurality of discharging branches, the discharging branches are connected in parallel, the discharging branches have the same structure and comprise capacitors and switches which are connected in series.
2. The welding circuit of claim 1, wherein the control module comprises a power switch, a normally open self-resetting switch, a normally closed self-resetting switch, a relay with three normally open nodes and one normally closed node;
the power switch, the normally open self-reset switch, the normally closed self-reset switch and the relay are connected in series to form a closed loop, the input end of the energy storage module is connected in parallel to two ends of the power switch, and the normally open node KA of the relay-1The normally-open nodes KA of the relay are arranged at two ends of the normally-open self-reset switch in parallel-2Normally open node KA-3The series connection is arranged at the input end of the energy storage module, and the normally closed node KA of the relay-4The energy storage module is connected in series with the output end of the energy storage module.
3. The welding circuit of claim 2, wherein the control module further comprises a boost rectifier having an input connected in parallel across the power switch, and a first output port of the boost rectifier connected to the normally open node KA-2Connected, the second output port of the boost rectifier and the normally open node KA-3And (4) connecting.
4. The welding circuit of claim 3, further comprising an adjustable potentiometer having a first fixed contact connected to the first output port of the boost rectifier and a second fixed contact connected to the second output port of the boost rectifier and the normally open node KA-3The movable contact of the adjustable potentiometer is connected with the normally open node KA-2And (4) connecting.
5. The welding circuit of claim 1, further comprising a fuse 1FU, wherein the fuse 1FU is disposed in series with the control module.
6. The welding circuit of claim 3, further comprising a fuse 2FU, wherein the fuse 2FU is disposed in series at an input of the boost rectifier.
7. The welding circuit of claim 6, wherein the control module further comprises an isolation transformer, wherein the power switch is disposed on a primary side of the isolation transformer, and wherein the normally open self-reset switch, the normally closed self-reset switch, the relay, the fuse 1FU, and the boost rectifier are disposed on a secondary side of the isolation transformer.
8. A welding circuit according to claim 1 wherein said object to be welded is a thermocouple.
9. A portable adjustable impact welder comprising a housing and a welding rod, wherein a welding circuit according to any one of claims 1 to 8 is provided in the housing and the output of the energy storage module is electrically connected to the welding rod.
10. A portable adjustable impact welder according to claim 9, characterized in that said welding rod is provided as a copper cylinder.
CN202111592791.8A 2021-12-23 2021-12-23 Welding circuit and portable adjustable impact welding machine Active CN114178654B (en)

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CN206316530U (en) * 2016-11-30 2017-07-11 岭东核电有限公司 Use for laboratory precision pulse welding machine

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CN203607815U (en) * 2013-09-30 2014-05-21 合肥南南电力保护设备有限公司 Safety protection circuit of energy storage circuit of explosive discharge type large-current rapid on-off device
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