A welding device for underwater operations

Abstract

The utility model discloses a kind of welding devices for underwater operation, including power supply device, the power supply device uses voltage less than 36v, the first end and the second end of the power supply loop of the power supply device are respectively connected with the capacitance;The capacitor is used to store electric charge, the first end and the second end of the capacitor are respectively connected with the positive electrode discharge part and the negative electrode discharge part matched;First control device is equipped between the positive electrode discharge part and the negative electrode discharge part, when first control device opens, short-circuit circuit is equipped between the positive electrode discharge part and the negative electrode discharge part. Since capacitor has the ability to store electric charge, when they are short-circuited, electric charge will be released with extremely high current instantaneously, connected with power supply device by first control device, and then realize the storage of electric charge, control short-circuit by second control device, when short-circuit, capacitor high-current discharge, and then produce high-temperature arc or produce high temperature and melt the piece to be welded.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment, and in particular to a welding device for underwater operations. Background Technology

[0002] Electric welding is a method of assembling workpieces by using electrical energy to heat or pressurize, or both, with or without filler material, to achieve atomic bonding.

[0003] Existing welding equipment generally uses AC power (220V) to convert AC power to DC power and then boosts the voltage and current. However, because the voltage is relatively high, the safety and design requirements are high in actual use, resulting in higher production costs.

[0004] In particular, for some non-standard welding operations, such as underwater operations, which use mains power to work in liquids, the safety and usage requirements are high. As a result, the cost of such special equipment is high, which affects its market share. Utility Model Content

[0005] The main purpose of this invention is to propose a welding device for underwater operations. It aims to use a low-voltage welding device, which uses low voltage in conjunction with a capacitor to achieve intermittent discharge, thereby melting the parts to be welded and improving welding safety.

[0006] To achieve the above objectives, this utility model proposes a welding device for underwater operations, comprising:

[0007] The power supply device uses a voltage of less than 36V, and the two ends of the power supply circuit of the power supply device are respectively connected to the first end and the second end of a capacitor.

[0008] The capacitor is used to store charge, and the first and second ends of the capacitor are respectively connected to a positive discharge section and a negative discharge section.

[0009] A first control device is provided between the positive discharge section and the negative discharge section. When the first control device is turned on, a short-circuit circuit is provided between the positive discharge section and the negative discharge section.

[0010] Because capacitors have the ability to store charge, when they are short-circuited, the charge is released instantaneously with an extremely high current. The first control device is connected to the power supply device to realize the storage of charge. The short circuit is controlled by the second control device. When short-circuited, the capacitor discharges with a high current, thereby generating a high-temperature arc or generating high temperature to melt the parts to be welded.

[0011] The first and second control devices are intermittently activated and staggered to achieve energy storage and short-circuit discharge. Therefore, in the actual design, the overall voltage is low. At the same time, because the short-circuit sequence is short, the charge of the capacitor can be released quickly (the current can reach between 700A and 1300A), avoiding the problem of high voltage residue and thus improving the safety of underwater operations. Attached Figure Description

[0012] Figure 1 This is a framework diagram of the present utility model;

[0013] Figure 2 This is the circuit diagram of this utility model.

[0014] In the picture,

[0015] 1 is a capacitor, 11 is a power supply device, 12 is an arc channel, 13 is the first control device, and 14 is the second control device.

[0016] 21 is the positive discharge section, and 22 is the negative discharge section.

[0017] 31 is an oxygen supply device, and 32 is a conveying device for parts to be welded. Detailed Implementation

[0018] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0019] It should be noted that if any directional indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, etc.) is involved in the embodiments of this utility model, the directional indication is only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0020] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0021] like Figure 1 As shown, a welding device for underwater operations includes:

[0022] The power supply device uses a voltage of less than 36V, and the two ends of the power supply circuit of the power supply device are respectively connected to the first end and the second end of a capacitor.

[0023] The capacitor is used to store charge, and the first and second ends of the capacitor are respectively connected to a positive discharge section and a negative discharge section.

[0024] A first control device is provided between the positive discharge section and the negative discharge section. When the first control device is turned on, a short-circuit circuit is provided between the positive discharge section and the negative discharge section.

[0025] Because capacitors have the ability to store charge, when they are short-circuited, the charge is released instantaneously with an extremely high current. The first control device is connected to the power supply device to realize the storage of charge. The short circuit is controlled by the second control device. When short-circuited, the capacitor discharges with a high current, thereby generating a high-temperature arc or generating high temperature to melt the parts to be welded.

[0026] The first and second control devices are intermittently activated and staggered to achieve energy storage and short-circuit discharge. Therefore, in the actual design, the overall voltage is low. At the same time, because the short-circuit sequence is short, the charge of the capacitor can be released quickly (the current can reach between 700A and 1300A), avoiding the problem of high voltage residue and thus improving the safety of underwater operations.

[0027] Specifically, a second control device is provided between the power supply circuit of the power supply device and the first and second ends of the capacitor. The second control device is used to control the charge storage of the capacitor, which is equivalent to charging the capacitor.

[0028] In specific designs, several resistors can be connected in series or parallel between the second control device and the capacitor to reduce the impact on the lithium battery and improve the stability of use. Specifically, diodes or fuses can also be set to further improve the stability of use.

[0029] Specifically, the first control device is used to intermittently control the opening or closing of the short circuit, wherein intermittent opening can effectively reduce capacitor damage caused by instantaneous high temperature during short circuit and improve the service life of the welding device.

[0030] Specifically, the capacitors are provided in multiple groups, and the short-circuit circuits are connected in parallel to each other in the same arc channel. In actual testing, the current during short-circuiting can reach 1000A or even higher, thereby generating high temperature or high arc, and thus melting the parts to be welded.

[0031] Specifically, the positive discharge section and the negative discharge section are interconnected or have a gap between them.

[0032] Specifically, the gap in the arc channel is less than 3mm.

[0033] Specifically, the first control device is used to control the output current of the capacitor.

[0034] Specifically, it also includes an oxygen supply device and a conveying device for the workpiece to be welded, wherein the oxygen supply port of the oxygen supply device is arranged opposite to the arc channel.

[0035] Specifically, the power supply device is a lithium battery. Of course, other low-voltage power sources can also be used.

[0036] The preferred power supply is 16V or 12V, which can achieve the predetermined power supply voltage and ensure stable operation.

[0037] The capacitor in question is a supercapacitor. It combines the high power density of a capacitor with the high energy density of a battery, exhibiting excellent performance in terms of rapid charging and discharging, cycle life, and temperature adaptability, and is widely used in energy storage, transportation, electronics, and other fields.

[0038] The positive discharge section and the negative discharge section are respectively a spark rod and a spark plate.

[0039] High power density: up to 10,000 W / kg or more, supporting second-level fast charging and discharging.

[0040] Long cycle life: The number of charge-discharge cycles can reach 500,000 to 1,000,000, far exceeding that of batteries.

[0041] Wide temperature range: suitable for environments from -40°C to +70°C.

[0042] Low energy density: The energy density is generally 5~50 Wh / kg, which is lower than that of lithium batteries (100~265 Wh / kg).

[0043] The power supply device is also equipped with chargers at both ends for charging it.

[0044] The power supply can be DC / AC; in actual designs, both AC and DC power can charge the supercapacitor.

[0045] Of course, the specific first and second control devices can be control switches, and other mechanical structures can also be used in the first control device to generate an arc channel (for example, a mechanical structure to bring the discharge part closer).

[0046] The short-circuit circuit can also be equipped with a resistor or other structure to ensure safe use.

[0047] In practical applications, the electric arc channel, with or without a carrier, melts the parts to be welded at high temperatures, thereby achieving the bonding between the components.

[0048] The carrier-free component (which does not require the addition of other materials) can be a component that is fused together, that is, it can achieve direct fusion.

[0049] The carrier can also be materials such as welding wire or flux, thereby achieving the bonding between components. In practice, the number of carriers can be increased depending on the materials and environment.

[0050] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A welding device for underwater operations, characterized in that, include: The power supply device uses a voltage of less than 36V, and the two ends of the power supply circuit of the power supply device are respectively connected to the first end and the second end of a capacitor. The capacitor is used to store charge, and the first and second ends of the capacitor are respectively connected to a positive discharge section and a negative discharge section. A second control device is provided between the power supply circuit of the power supply device and the first and second ends of the capacitor. The second control device is used to control the charge storage of the capacitor.

2. The welding device for underwater operations as described in claim 1, characterized in that: A first control device is provided between the positive discharge section and the negative discharge section. When the first control device is activated, a short-circuit circuit is provided between the positive discharge section and the negative discharge section. When short-circuited, the capacitor discharges a high current, which in turn generates a high-temperature arc or generates high temperature that melts the parts to be welded.

3. The welding device for underwater operations as described in claim 2, characterized in that: The first control device is used to intermittently control the opening or closing of the short circuit.

4. The welding device for underwater operations as described in claim 3, characterized in that: The capacitors are provided in one or more groups, and the short-circuit circuits are connected in parallel to each other in the same arc channel.

5. The welding device for underwater operations as described in claim 4, characterized in that: The positive discharge section and the negative discharge section are connected to each other or have a gap between them.

6. The welding device for underwater operations as described in claim 5, characterized in that: The positive discharge section and the negative discharge section are respectively a spark rod and a spark plate.

7. The welding device for underwater operations as described in claim 4, characterized in that: The capacitor is a supercapacitor.

8. The welding device for underwater operations as described in claim 4, characterized in that: It also includes an oxygen supply device, wherein the oxygen supply port of the oxygen supply device is arranged opposite to the electric arc channel.

9. The welding device for underwater operations as described in claim 1, characterized in that: The power supply device is a lithium battery.

10. The welding device for underwater operations as described in claim 4, characterized in that: The gap in the arc channel is less than 3mm, and the two ends of the power supply device are also equipped with chargers for charging it.

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