Welding pen with double welding heads

Abstract

The utility model relates to a welding pen with double welding heads, and belongs to the technical field of photovoltaic module manufacturing. Comprising a first shell, two second shells, two third shells, four fasteners, two welding heads, a connecting plate, four groups of electrifying assemblies, two groups of power lead assemblies, two temperature measuring lines, two heating cores and a controller. The first shell and the two second shells are rotationally connected through the four fasteners, the two second shells and the two third shells are rotationally connected, one ends of the two welding heads are fixedly connected with the two heating cores in the two third shells respectively, and the welding pen with the double welding heads is formed. When the welding fixture is used for welding a diode of a junction box, the two ends of the diode can be welded at the same time, and the phenomenon of missing welding of the diode is reduced; in addition, the controller is arranged to control the magnitude of current passing through the power supply lead assembly, so that the temperature of the heating core is controlled, the temperature of the welding head is controlled, and the service life of the welding head is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic component manufacturing, in particular to a soldering pen with double soldering heads. Background Art

[0002] During the production process of photovoltaic modules, it is necessary to weld the lead wires of the photovoltaic modules to the two ends of the diode in the junction box. Although the automatic welding machines on the market are relatively mature, the welding work often needs to be done manually with a welding pen due to unavoidable factors such as failure of the automatic welding machines and product size updates.

[0003] However, there are three junction boxes on the photovoltaic module, and each junction box has a diode. Therefore, each photovoltaic module needs to be welded six times during manual welding. The welding pens currently used on the welding production line are all single-tip welding pens, and there is a phenomenon of welding leakage during manual welding, which makes the welding efficiency and finished product qualification rate of the photovoltaic module low, thereby affecting the work efficiency of the production line; in addition, after long-term use, the temperature of the welding head of the existing welding pen is relatively high. If the welding head is kept at a high temperature for a long time during welding operations, it is not only not conducive to the welding effect, but also shortens the service life of the welding head. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a soldering pen with double soldering heads. The technical solution of the utility model is as follows:

[0005] A welding pen with double welding heads, comprising a first shell, two second shells, two third shells, four fasteners, two welding heads, a connecting plate, four groups of power supply components, two groups of power supply lead components, two temperature measuring wires, two heating cores and a controller, wherein a first inverted U-shaped groove is provided at the bottom of the connecting plate, the bottom end of the first shell is connected to the top end of the connecting plate, the top ends of the two second shells are located in the first inverted U-shaped groove, the top ends of the two second shells are rotatably connected to the bottom end of the connecting plate through two of the fasteners, the bottom ends of the two second shells are rotatably connected to the top ends of the two third shells through the other two fasteners, the two heating cores are respectively fixed in the two third shells, the top ends of the two welding heads are respectively passed through the bottom ends of the two third shells and fixedly connected to the bottom ends of the two heating cores; the first group of power supply components and the second group of power supply components are respectively connected to the connection between the connecting plate and the two second shells, and the third group of power supply components and the fourth group of power supply components are respectively connected to the connection between the two second shells and the two third shells;

[0006] One end of the two groups of power lead assemblies is connected to the external power supply, one end of the two temperature measuring wires is connected to the controller, the other end of the first group of power lead assemblies and the other end of the first temperature measuring wire are connected to the top of the first heating core through the first shell, the first group of power-on assemblies, the first second shell, the third group of power-on assemblies and the first third shell in sequence, the other end of the second group of power lead assemblies and the other end of the second temperature measuring wire are connected to the top of the second heating core through the first shell, the second group of power-on assemblies, the second second shell, the fourth group of power-on assemblies and the second third shell in sequence; both groups of power lead assemblies are electrically connected to the controller.

[0007] Optionally, each group of the power-carrying components includes three conductive slip rings and three contacts, and the three conductive slip rings are electrically connected after being abutted against the three contacts respectively; the top ends of the two second shells are connected to the first protrusion, the top ends of the two third shells are connected to the second protrusion, and the bottoms of the two second shells are provided with a second inverted U-shaped groove, the top ends of the two second shells are plugged into the first inverted U-shaped groove through the first protrusion, and the top ends of the two third shells are respectively plugged into the second inverted U-shaped grooves of the two second shells through the second protrusion; the three conductive slip rings in the first group of the power-carrying components are connected to one of the inner side walls of the first inverted U-shaped groove, and the three contacts are connected to the first of the second outer The three conductive slip rings in the second group of the power-carrying components are connected to one of the inner side walls of the first inverted U-shaped groove, and the three contacts are connected to one of the outer side walls of the first protrusion of the second shell; the three conductive slip rings in the third group of the power-carrying components are connected to one of the inner side walls of the second inverted U-shaped groove of the first second shell, and the three contacts are connected to one of the outer side walls of the second protrusion of the first third shell; the three conductive slip rings in the fourth group of the power-carrying components are connected to one of the inner side walls of the second inverted U-shaped groove of the second second shell, and the three contacts are connected to one of the outer side walls of the second protrusion of the second third shell.

[0008] Optionally, each group of the power lead assemblies includes a positive power lead and a negative power lead, and one end of the positive power lead and the negative power lead in each group of the power lead assemblies are respectively connected to the positive and negative poles of an external power source; the other end of the positive power lead in the first group of power lead assemblies, the other end of the negative power lead and the other end of the first temperature measuring wire are respectively connected to the top of the first heating core through three conductive slip rings and three contacts in the first group of power-on assemblies and three conductive slip rings and three contacts in the third group of power-on assemblies; the other end of the positive power lead in the second group of power lead assemblies, the other end of the negative power lead and the other end of the second temperature measuring wire are respectively connected to the top of the second heating core through three conductive slip rings and three contacts in the second group of power-on assemblies and three conductive slip rings and three contacts in the fourth group of power-on assemblies.

[0009] Optionally, the outer peripheries of the first shell, the two second shells and the connecting plate are all wrapped with a heat insulation sleeve, and the outer side surface of the heat insulation sleeve is provided with a plurality of anti-slip protrusions.

[0010] Optionally, a plurality of heat dissipation holes are provided on the two third shells.

[0011] Optionally, the first shell, the two second shells, the two third shells and the connecting plate are all made of stainless steel.

[0012] Optionally, the welding head is made of copper.

[0013] Optionally, each of the conductive slip rings is made of copper, and each of the contacts is made of copper.

[0014] All the optional technical solutions mentioned above can be combined arbitrarily, and the present utility model does not provide detailed descriptions of the structures after the combinations one by one.

[0015] By means of the above scheme, the beneficial effects of the utility model are as follows:

[0016] A welding pen with double welding heads is provided by arranging a first shell, two second shells, two third shells, four fasteners and two welding heads; the first shell, two second shells and two third shells are rotatably connected by four fasteners; and one end of the two welding heads passes through the two third shells respectively and is fixedly connected to two heating cores respectively fixed in the two third shells. When a diode of a junction box is welded by the welding pen with double welding heads, welding operations can be performed on both ends of the diode at the same time, thereby reducing the phenomenon of leakage welding of the diode; in actual application, the staff can adjust the angle between the first shell and the two second shells and the angle between the second shell and the third shell by adjusting four fasteners, thereby adjusting the spacing between the two welding heads, so that the utility model is suitable for different types of junction boxes, thereby making the utility model have good compatibility and applicability, and can be suitable for welding photovoltaic modules of different sizes or specifications; by setting a controller, two groups of power lead assemblies and two temperature measuring wires are connected to the controller, when the utility model is used for welding operations, the controller controls the external power supply to provide current to the two heating cores through the two groups of power lead assemblies, so that the temperature of the heating core rises, thereby raising the temperature of the two welding heads; the temperature measuring wire detects the temperature of the heating core in real time and transmits it to the controller, the controller displays the temperature detected by the temperature measuring wire, the staff observes the temperature displayed by the controller, controls the current through the power lead assembly by operating the controller, thereby controls the temperature of the heating core, thereby controls the temperature of the welding head, avoids the welding head from operating at a high temperature for a long time, and improves the service life of the welding head.

[0017] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a left view of the utility model;

[0020] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0021] Figure 4 for Figure 2 A partial enlarged view of point B in the middle;

[0022] Figure 5 This is a schematic diagram of the connection relationship between the second housing and the third housing in the present utility model;

[0023] Figure 6It is a front view of three conductive slip rings in the utility model.

[0024] Description of Figure Numbers:

[0025] 1. First shell; 2. Second shell; 21. First protrusion; 22. Second inverted U-shaped groove; 3. Third shell; 31. Second protrusion; 4. Fastener; 5. Welding head; 6. Connecting plate; 61. First inverted U-shaped groove; 7. Conductive slip ring; 8. Contact; 9. Positive power lead; 10. Negative power lead; 11. Temperature measuring wire; 12. Heating core. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] like Figures 1 to 6 As shown, the utility model provides a welding pen with a double welding head 5, including a first shell 1, two second shells 2, two third shells 3, four fasteners 4, two welding heads 5, a connecting plate 6, four groups of power supply components, two groups of power lead components, two temperature measuring wires 11, two heating cores 12 and a controller, the bottom of the connecting plate 6 is provided with a first inverted U-shaped groove 61, the bottom end of the first shell 1 is connected to the top of the connecting plate 6, the tops of the two second shells 2 are located in the first inverted U-shaped groove 61, and the tops of the two second shells 2 are rotatably connected to the bottom of the connecting plate 6 through two of the fasteners 4. Then, the bottom ends of the two second shells 2 are rotatably connected to the top ends of the two third shells 3 through the other two fasteners 4, the two heating cores 12 are respectively fixed in the two third shells 3, and the top ends of the two welding heads 5 pass through the bottom ends of the two third shells 3 and are fixedly connected to the bottom ends of the two heating cores 12; the first group of power-on components and the second group of power-on components are respectively connected to the connection between the connecting plate 6 and the two second shells 2, and the third group of power-on components and the fourth group of power-on components are respectively connected to the connection between the two second shells 2 and the two third shells 3;

[0028] One end of the two groups of power lead assemblies are connected to the external power supply, one end of the two temperature measuring wires 11 are connected to the controller, the other end of the first group of power lead assemblies and the other end of the first temperature measuring wire 11 are connected to the top of the first heating core 12 after passing through the first shell 1, the first group of power-on assemblies, the first of the second shells 2, the third group of power-on assemblies and the first of the third shells 3 in sequence, the other end of the second group of power lead assemblies and the other end of the second temperature measuring wire 11 are connected to the top of the second heating core 12 after passing through the first shell 1, the second group of power-on assemblies, the second of the second shells 2, the fourth group of power-on assemblies and the second of the third shells 3 in sequence; both groups of power lead assemblies are electrically connected to the controller.

[0029] Specifically, each fastener 4 in the present invention is a bolt and a nut.

[0030] In a specific implementation, each bolt and each nut are loosened, and the two second shells 2 and the two third shells 3 are rotated respectively, thereby changing the angle between the two second shells 2 and the first shell 1 and the angle between the second shell 2 and the third shell 3, and then each bolt and each nut are tightened to fix the positions of the two second shells 2 and the two third shells 3, thereby realizing the adjustment of the distance between the two welding heads 5 and the adjustment of the inclination angle of the two welding heads 5 themselves.

[0031] Furthermore, the welding temperature range is usually 400℃±20℃. When performing welding operations, the two temperature measuring wires 11 detect the temperatures of the two heating cores 12 in real time and transmit them to the controller. The temperature is displayed on the display in the controller. The staff observes the temperature values ​​of the two heating cores 12. When one of the temperature values ​​exceeds the welding temperature range, the staff can operate the controller to control the current passing through one set of power lead assemblies, thereby controlling the temperature of one of the heating cores 12.

[0032] When welding a diode of a junction box through the utility model, the two ends of the diode can be welded simultaneously by the welding pen, thereby reducing the phenomenon of leaking welding of the diode; in actual application, the staff can adjust the angle between the first shell 1 and the two second shells 2 and the angle between the second shell 2 and the third shell 3 by adjusting the four fasteners 4, and then adjust the distance between the two welding heads 5, so that the utility model is suitable for different types of junction boxes, and thus the utility model has good compatibility and applicability, and can be suitable for welding photovoltaic modules of different sizes or specifications; due to the different habits of the staff in holding the welding pen, the inclination angle of the welding head 5 is different. The utility model changes the angle between the second shell 2 and the third shell 3, and then changes the inclination angle of the two welding heads 5 themselves, so that the utility model can adapt to the different habits of the staff in holding the welding pen.

[0033] By setting up a controller, two groups of power lead assemblies and two temperature measuring wires 11 are connected to the controller. When the utility model is used for welding operations, the controller controls the external power supply to provide current to the two heating cores 12 through the two groups of power lead assemblies, so that the temperature of the heating core 12 rises, and then the temperature of the two welding heads 5 rises; the temperature measuring wire 11 detects the temperature of the heating core 12 in real time and transmits it to the controller. The controller displays the temperature detected by the temperature measuring wire 11. The staff observes the temperature displayed by the controller and controls the current passing through the power lead assembly by operating the controller, thereby controlling the temperature of the heating core 12, thereby controlling the temperature of the welding head 5, avoiding the welding head 5 from operating at a high temperature for a long time, and improving the service life of the welding head 5.

[0034] Optionally, each group of the power-on components includes three conductive slip rings 7 and three contacts 8, and the three conductive slip rings 7 are electrically connected to the three contacts 8 after being abutted respectively; the tops of the two second shells 2 are connected to the first protrusion 21, the tops of the two third shells 3 are connected to the second protrusion 31, and the bottoms of the two second shells 2 are provided with a second inverted U-shaped groove 22, the tops of the two second shells 2 are plugged into the first inverted U-shaped groove 61 through the first protrusion 21, and the tops of the two third shells 3 are respectively plugged into the second inverted U-shaped grooves 22 of the two second shells 2 through the second protrusion 31; the three conductive slip rings 7 in the first group of the power-on components are connected to one of the inner side walls of the first inverted U-shaped groove 61, and the three contacts 8 are connected to the first and second The three conductive slip rings 7 in the second group of the power-on components are connected to one of the inner side walls of the first inverted U-shaped groove 61, and the three contacts 8 are connected to one of the outer side walls of the first protrusion 21 of the second shell 2; the three conductive slip rings 7 in the third group of the power-on components are connected to one of the inner side walls of the second inverted U-shaped groove 22 of the first second shell 2, and the three contacts 8 are connected to one of the outer side walls of the second protrusion 31 of the first third shell 3; the three conductive slip rings 7 in the fourth group of the power-on components are connected to one of the inner side walls of the second inverted U-shaped groove 22 of the second second shell 2, and the three contacts 8 are connected to one of the outer side walls of the second protrusion 31 of the second third shell 3.

[0035] Optionally, each group of the power lead assemblies includes a positive power lead 9 and a negative power lead 10, and one end of the positive power lead 9 and the negative power lead 10 in each group of the power lead assemblies are respectively connected to the positive and negative poles of an external power source; the other end of the positive power lead 9, the other end of the negative power lead 10 and the other end of the first temperature measuring wire 11 in the first group of power lead assemblies are respectively connected to the top of the first heating core 12 through the three conductive slip rings 7 and the three contacts 8 in the first group of power-on assemblies and the three conductive slip rings 7 and the three contacts 8 in the third group of power-on assemblies; the other end of the positive power lead 9, the other end of the negative power lead 10 and the other end of the second temperature measuring wire 11 in the second group of power lead assemblies are respectively connected to the top of the second heating core 12 through the three conductive slip rings 7 and the three contacts 8 in the second group of power-on assemblies and the three conductive slip rings 7 and the three contacts 8 in the fourth group of power-on assemblies.

[0036] In a specific implementation manner, the positive power lead 9, the negative power lead 10 and the temperature measuring wire 11 in the utility model are divided into three parts, wherein one end of the first part of the first positive power lead 9 and the first negative power lead 10 is connected to an external power source, one end of the first part of the first temperature measuring wire 11 is connected to a controller, and the other ends of the first positive power lead 9, the first negative power lead 10 and the first part of the first temperature measuring wire 11 are respectively connected to the first conductive slip ring 7, the second conductive slip ring 7 and the third conductive slip ring 7 in the first group of energized components;

[0037] One end of the first positive power lead 9, the first negative power lead 10 and the second part of the first temperature measuring wire 11 are respectively connected to the first contact 8, the second contact 8 and the third contact 8 in the first group of energized components, and the other end is respectively connected to the first conductive slip ring 7, the second conductive slip ring 7 and the third conductive slip ring 7 in the third group of energized components;

[0038] One end of the first positive power lead 9, the first negative power lead 10 and the third part of the first temperature measuring wire 11 are respectively connected to the first contact 8, the second contact 8 and the third contact 8 in the third group of energized components, and the other ends are all connected to the top of the first heating core 12;

[0039] The connection method between the second positive power lead 9, the second negative power lead 10, the second temperature measuring line 11 and the second group of power-on components and the fourth group of power-on components is consistent with the connection method between the first positive power lead 9, the first negative power lead 10 and the first temperature measuring line 11, and will not be described in detail here.

[0040] The two groups of power lead assemblies form a current path through the electrical connection between the first conductive slip ring 7 and the first contact 8, and the second conductive slip ring 7 and the second contact 8 in the four groups of power-on assemblies, thereby providing a stable current for the two heating cores 12; the two temperature measuring wires 11 form a temperature detection path through the third conductive slip ring 7 and the third contact 8 in the four groups of power-on assemblies, thereby being able to detect the temperatures of the two heating cores 12 in real time.

[0041] Optionally, the outer peripheries of the first housing 1, the two second housings 2 and the connecting plate 6 are all wrapped with a heat-insulating sleeve, and the outer side of the heat-insulating sleeve is provided with a plurality of anti-slip protrusions. Specifically, the heat-insulating sleeve in the utility model is made of silicone.

[0042] The thermal insulation sleeve made of silicone can not only prevent workers from being scalded during use, but also has an insulating effect, which can protect workers from injury when accidents such as leakage occur; the multiple anti-slip protrusions arranged on the outer side of the thermal insulation sleeve not only have an anti-slip effect, but also can improve the comfort of workers when holding the utility model.

[0043] Optionally, a plurality of heat dissipation holes are provided on the two third shells 3. By providing a plurality of heat dissipation holes on the two third shells 3, the heat dissipation effect of the utility model can be enhanced, the temperature inside the third shell 3 can be reduced, the temperature of the welding head 5 can be prevented from being too high, the welding effect of the diode welding point can be improved, and the service life of the welding head 5 can be extended.

[0044] Optionally, the first shell 1, the two second shells 2, the two third shells 3 and the connecting plate 6 are all made of stainless steel. The first shell 1, the two second shells 2, the two third shells 3 and the connecting plate 6 made of stainless steel have high heat resistance and can maintain strength at high temperatures, ensuring that the first shell 1, the two second shells 2, the two third shells 3 and the connecting plate 6 will not be deformed during welding.

[0045] Optionally, the material of the welding head 5, the two second shells 2, the two third shells 3 and the connection is copper. The copper welding head 5 has strong thermal conductivity and can quickly melt the welding rod, so that the welding rod and the welding points at both ends of the diode form a good welding effect.

[0046] Optionally, each of the conductive slip rings 7 is made of copper, and each of the contacts 8 is made of copper. The conductive slip rings 7 and contacts made of copper have good conductivity, so that the positive power lead 9 and the negative power lead 10 form a stable current path in the first housing 1, the two second housings 2, and the two third housings 3.

[0047] In summary, the utility model can realize one-time welding of the two ends of a diode by setting two welding heads 5, thereby reducing the leakage rate of manual welding; by adopting four fasteners 4 to make the two second shells 2 rotatably connected with the connecting plate 6, and the two second shells 2 and the two third shells 3 rotatably connected, the adjustment of the angle between the two second shells 2 and the first shell 1 and the adjustment of the angle between the two second shells 2 and the two third shells 3 are realized, thereby realizing the adjustment of the spacing between the two welding heads 5 and the adjustment of the inclination angle of the two welding heads 5, so that the utility model has good compatibility and wide applicability, is suitable for different types of junction boxes, and can also adapt to the habits of different staff members holding welding pens; and by connecting the two sets of power lead assemblies with the controller, the temperature of the heating core 12 is adjusted, thereby improving the welding effect at both ends of the diode.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A soldering pen with double soldering heads, characterized in that: include: A first shell (1), two second shells (2), two third shells (3), four fasteners (4), two welding heads (5), a connecting plate (6), four groups of power supply components, two groups of power supply lead components, two temperature measuring wires (11), two heating cores (12) and a controller, wherein a first inverted U-shaped groove (61) is provided at the bottom of the connecting plate (6), the bottom end of the first shell (1) is connected to the top end of the connecting plate (6), the top ends of the two second shells (2) are located in the first inverted U-shaped groove (61), the top ends of the two second shells (2) are rotatably connected to the bottom of the connecting plate (6) through two of the fasteners (4), the bottom ends of the two second shells (2) are rotatably connected to the top ends of the two third shells (3) through the other two fasteners (4), the two heating cores (12) are respectively fixed in the two third shells (3), and the top ends of the two welding heads (5) pass through the bottom ends of the two third shells (3) and are fixedly connected to the bottom ends of the two heating cores (12); The first group of power-on components and the second group of power-on components are respectively connected to the connection between the connection plate (6) and the two second shells (2), and the third group of power-on components and the fourth group of power-on components are respectively connected to the connection between the two second shells (2) and the two third shells (3); One end of the two groups of power lead assemblies is connected to an external power source, one end of the two temperature measuring wires (11) is connected to the controller, the other end of the first group of power lead assemblies and the other end of the first temperature measuring wire (11) are connected to the top of the first heating core (12) after passing through the first shell (1), the first group of power-on assemblies, the first of the second shells (2), the third group of power-on assemblies and the first of the third shells (3), and the other end of the second group of power lead assemblies and the other end of the second temperature measuring wire (11) are connected to the top of the second heating core (12) after passing through the first shell (1), the second group of power-on assemblies, the second of the second shells (2), the fourth group of power-on assemblies and the second of the third shells (3); Both sets of power lead components are electrically connected to the controller.

2. A soldering iron with double soldering tips according to claim 1, characterized in that: Each group of the power supply components comprises: three conductive slip rings (7) and three contacts (8), and the three conductive slip rings (7) are electrically connected to the three contacts (8) after being abutted against each other; The top ends of the two second shells (2) are connected to a first protrusion (21), the top ends of the two third shells (3) are connected to a second protrusion (31), the bottom ends of the two second shells (2) are provided with a second inverted U-shaped groove (22), the top ends of the two second shells (2) are plugged into the first inverted U-shaped groove (61) through the first protrusion (21), and the top ends of the two third shells (3) are respectively plugged into the second inverted U-shaped grooves (22) of the two second shells (2) through the second protrusion (31); The three conductive slip rings (7) in the first group of the power-on components are connected to one of the inner side walls of the first inverted U-shaped groove (61), and the three contacts (8) are connected to one of the outer side walls of the first protrusion (21) of the first second shell (2); the three conductive slip rings (7) in the second group of the power-on components are connected to one of the inner side walls of the first inverted U-shaped groove (61), and the three contacts (8) are connected to one of the outer side walls of the first protrusion (21) of the second second shell (2); the three conductive slip rings (7) in the third group of the power-on components are connected to one of the inner side walls of the first inverted U-shaped groove (61), and the three contacts (8) are connected to one of the outer side walls of the first protrusion (21) of the second second shell (2); The conductive slip ring (7) is connected to one of the inner side walls of the second inverted U-shaped groove (22) of the first of the second shells (2), and the three contacts (8) are connected to one of the outer side walls of the second protrusion (31) of the first of the third shells (3); the three conductive slip rings (7) in the fourth group of the power-carrying components are connected to one of the inner side walls of the second inverted U-shaped groove (22) of the second of the second shells (2), and the three contacts (8) are connected to one of the outer side walls of the second protrusion (31) of the second of the third shells (3).

3. A soldering iron with double soldering heads according to claim 2, characterized in that: Each group of the power lead assembly comprises a positive power lead (9) and a negative power lead (10), and one end of the positive power lead (9) and the negative power lead (10) in each group of the power lead assembly is connected to the positive electrode and the negative electrode of the external power source respectively; The other end of the positive power lead (9) in the first group of power lead components, the other end of the negative power lead (10) and the other end of the first temperature measuring wire (11) are connected to the top end of the first heating core (12) through the three conductive slip rings (7) and three contacts (8) in the first group of power supply components and the three conductive slip rings (7) and three contacts (8) in the third group of power supply components respectively; The other end of the positive power lead (9) in the second group of power lead components, the other end of the negative power lead (10) and the other end of the second temperature measuring wire (11) are connected to the top end of the second heating core (12) through the three conductive slip rings (7) and three contacts (8) in the second group of power supply components and the three conductive slip rings (7) and three contacts (8) in the fourth group of power supply components, respectively.

4. A soldering iron with double soldering tips according to claim 1, characterized in that: The outer circumferences of the first outer shell (1), the two second outer shells (2) and the connecting plate (6) are all wrapped with a heat insulation sleeve, and the outer side surface of the heat insulation sleeve is provided with a plurality of anti-slip protrusions.

5. A soldering iron with double soldering tips according to claim 1, characterized in that: The two third shells (3) are each provided with a plurality of heat dissipation holes.

6. A soldering iron with double soldering tips according to claim 1, characterized in that: The first housing (1), the two second housings (2), the two third housings (3) and the connecting plate (6) are all made of stainless steel.

7. A soldering iron with double soldering tips according to claim 1, characterized in that: The welding head (5) is made of copper.

8. A soldering iron with double soldering tips according to claim 2, characterized in that: The material of each conductive slip ring (7) is copper, and the material of each contact (8) is copper.

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