An electromagnetic induction welding head

Abstract

This utility model relates to the field of welding equipment technology, and in particular to an electromagnetic induction welding head. The device includes an induction mechanism; the induction mechanism includes an induction body and a nozzle; the nozzle outlet faces the induction body and is configured to spray a protective medium; the flow path of the protective medium covers the induction body to remove moisture and dust from the induction body and the welding positions of the two workpieces, forming a protective area at the welding positions. When in use, the electromagnetic induction welding head provided by this utility model continuously sprays a protective medium onto the induction body to remove moisture and dust from the induction body and the welding positions of the two workpieces, forming a protective area at the welding positions. This solves the problem that in outdoor construction environments such as railway construction, where high humidity and dust content cause moisture and dust in the air to easily accumulate and condense in the tiny gap between the welding head and the workpiece, resulting in a short circuit between the welding head and the workpiece.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, and in particular to an electromagnetic induction welding head. Background Technology

[0002] Electromagnetic induction welding is a solid-state welding technology that achieves the joining of metal materials based on the principle of electromagnetic induction. When an alternating current passes through the welding head (i.e., the inductor), an alternating magnetic field is generated around it. Eddy currents are induced inside the workpiece located in the welding head. Due to the resistance of the workpiece material itself, the eddy currents generate Joule heat during the flow process. As a result, the contact area between the two workpieces is rapidly heated to a plastic or molten state. Subsequently, under the action of external pressure, the metallurgical bond between the two workpieces is achieved.

[0003] In practical engineering applications, due to the high humidity and dust content in outdoor construction environments such as railway construction, and the fact that the welding head needs to be close to the workpiece for welding operations, water vapor and dust in the air can easily accumulate and condense in the tiny gap between the welding head and the workpiece, thus causing a short circuit between the welding head and the workpiece. Utility Model Content

[0004] This invention provides an electromagnetic induction welding head to solve the problem that, due to the high humidity and dust content in outdoor construction environments such as railway construction, and the fact that the welding head needs to be close to the workpiece for welding operations, moisture and dust in the air easily accumulate and condense in the tiny gap between the welding head and the workpiece, thus causing a short circuit between the welding head and the workpiece.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] An electromagnetic induction welding head:

[0007] The device includes a sensing mechanism; the sensing mechanism includes a sensing body and a nozzle; the nozzle outlet faces the sensing body and is configured to spray a protective medium; the flow path of the protective medium covers the sensing body to remove moisture and dust from the sensing body and the two workpiece welding positions, and to form a protective area at the welding positions.

[0008] Furthermore, it also includes a gas supply mechanism; the gas supply mechanism includes a gas storage tank; the protective medium is compressed and stored in the gas storage tank; the outlet of the gas storage tank is connected to the nozzle to deliver the protective medium to the nozzle.

[0009] Furthermore, the gas supply mechanism also includes a temperature regulating structure; the inlet of the temperature regulating structure is connected to the gas storage tank, and its outlet is connected to the nozzle, so that the protective medium in the gas storage tank enters the nozzle through the temperature regulating structure; the temperature regulating structure is configured to heat the protective medium flowing through it to increase the temperature of the protected area.

[0010] Furthermore, the temperature control structure includes a heating box and an electric heating tube; the inlet of the heating box is connected to the outlet of the gas storage tank, and its outlet is connected to the inlet of the nozzle; the electric heating tube is installed inside the heating box and is located on the flow path of the protective medium in the heating box, for heating the protective medium.

[0011] Furthermore, the temperature control structure also includes multiple baffles; all of the multiple baffles are connected inside the heating chamber to form a baffle channel, which is used to extend the time for the protective medium to flow through the heating chamber.

[0012] Furthermore, the temperature control structure also includes a plurality of heating elements; the plurality of heating elements are all installed inside the heating chamber and are spaced apart along the flow direction of the protective medium; the baffle is located between adjacent heating elements to guide the protective medium to flow sequentially through the plurality of heating elements.

[0013] Furthermore, the air supply mechanism also includes an air supply structure; the air supply structure includes an axial flow fan; the outlet of the axial flow fan is connected to the inlet of the temperature control structure; the axial flow fan is configured to send ambient air into the temperature control structure, and after being heated by the temperature control structure, it is sprayed out through a nozzle to preheat the welding area of ​​the workpiece.

[0014] Furthermore, the gas supply mechanism also includes a three-way valve; the three-way valve has three ports, which are respectively connected to the outlet of the gas storage tank, the inlet of the temperature regulating structure and the outlet of the axial flow fan.

[0015] Furthermore, the air supply structure also includes a dust filter component; the dust filter component is connected to the inlet of the axial flow fan and is used to filter dust in the air entering the axial flow fan.

[0016] Furthermore, the sensing mechanism also includes a stabilizing bracket; the stabilizing bracket is fitted onto the nozzle and the sensing body, and its material is configured as insulating material, used to fix the outlet direction of the nozzle.

[0017] The beneficial effects of the electromagnetic induction welding head in this invention are analyzed as follows:

[0018] The device includes a sensing mechanism; the sensing mechanism includes a sensing body and a nozzle; the nozzle outlet faces the sensing body and is configured to spray a protective medium; the flow path of the protective medium covers the sensing body to remove moisture and dust from the sensing body and the two workpiece welding positions, and to form a protective area at the welding positions.

[0019] When in use, the electromagnetic induction welding head provided by this utility model continuously sprays a protective medium onto the induction body through a nozzle to remove moisture and dust from the induction body and the welding positions of the two workpieces, and forms a protective area at the welding position. This solves the problem that moisture and dust in the air can easily accumulate and condense in the tiny gap between the welding head and the workpiece, thereby causing a short circuit between the welding head and the workpiece. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of the electromagnetic induction welding head provided in this embodiment of the utility model;

[0022] Figure 2 A front view of the electromagnetic induction welding head provided in this embodiment of the utility model;

[0023] Figure 3 A schematic diagram of the sensing mechanism provided in this embodiment of the utility model;

[0024] Figure 4 A schematic diagram of the gas supply mechanism provided in this embodiment of the utility model;

[0025] Figure 5 A cross-sectional view of the temperature control structure provided in this embodiment of the utility model.

[0026] icon:

[0027] 100-Sensing mechanism; 110-Sensing body; 120-Nozzle; 130-Stabilizing bracket; 200-Air supply mechanism; 210-Air storage tank; 220-Temperature control structure; 221-Heating box; 222-Electric heating element; 223-Baffle plate; 230-Air supply structure; 231-Axial flow fan; 232-Dust filter component; 240-Three-way valve. Detailed Implementation

[0028] Due to the high humidity and dust content in outdoor construction environments such as railway construction, and the fact that the welding head needs to be close to the workpiece for welding operations, moisture and dust in the air can easily accumulate and condense in the tiny gap between the welding head and the workpiece, causing a short circuit between the welding head and the workpiece.

[0029] In view of this, this solution provides an electromagnetic induction welding head, including an induction mechanism 100.

[0030] The following combination Figures 1-5 A detailed description of the structure and shape of the electromagnetic induction welding head is provided:

[0031] The sensing mechanism 100 includes a sensing body 110 and a nozzle 120; the outlet of the nozzle 120 faces the sensing body 110 and is configured to spray a protective medium; the flow path of the protective medium covers the sensing body 110 to remove moisture and dust from the sensing body 110 and the two workpiece welding positions, and to form a protective area at the welding positions.

[0032] In this embodiment, the sensing body 110 is first fitted onto the welding position of the two workpieces. Then, the nozzle 120 sprays a protective medium onto the sensing body 110. The protective medium carries away the moisture and dust from the welding position of the sensing body 110 and the two workpieces. At the same time, the protective medium forms a protective area at the welding position to reduce or avoid the generation of oxides at the welding position. The types of protective medium include, but are not limited to, argon and carbon dioxide.

[0033] In addition, a protective medium is sprayed onto the induction body 110 through the nozzle 120 to remove heat from the induction body 110, thereby reducing the temperature of the induction body 110 during continuous welding and increasing the welding frequency.

[0034] To reduce welding costs while improving adaptability to railway embedded parts:

[0035] Carbon dioxide was chosen as the protective medium to reduce the cost of the protective medium while providing a weak oxygen environment. Since the materials of railway embedded parts are mostly low-carbon steel or medium-carbon steel, the metallurgical activity of elements such as Mn, Si, and C in the carbon steel is activated by a controllable oxidation reaction. By generating oxides that float to the surface and decarburizing and producing gas, the molten pool is purified, the microstructure is refined, and defects are reduced, ultimately resulting in a weld with excellent mechanical properties.

[0036] To supply protective medium to nozzle 120:

[0037] like Figure 1 and Figure 4 As shown, it also includes an air supply mechanism 200; the air supply mechanism 200 includes an air storage tank 210; the protective medium is compressed and stored in the air storage tank 210; the outlet of the air storage tank 210 is connected to the nozzle 120 to deliver the protective medium to the nozzle 120.

[0038] In this embodiment, the protective medium compressed and stored in the gas storage tank 210 is decompressed and enters the nozzle 120. The nozzle 120 constrains and guides the protective medium to be sprayed toward the sensing body 110. During this process, the unidirectional flow of the protective medium replaces the air in the sensing body 110 and the two workpiece welding positions, thereby forming a protective area at the welding position.

[0039] To reduce the impact of the protective medium on welding:

[0040] like Figure 4 As shown, the gas supply mechanism 200 also includes a temperature regulating structure 220; the inlet of the temperature regulating structure 220 is connected to the gas storage tank 210, and its outlet is connected to the nozzle 120, so that the protective medium in the gas storage tank 210 enters the nozzle 120 through the temperature regulating structure 220; the temperature regulating structure 220 is configured to heat the protective medium flowing through it to increase the temperature of the protected area.

[0041] In this embodiment, the Joule-Thomson effect occurs during the decompression of the protective medium from a high-pressure state to a low-pressure state, resulting in a decrease in the temperature of the expanded protective medium. At the same time, the low-temperature protective medium in a high-temperature welding environment will cause water vapor or other impurities to condense on the surface of the workpiece or in the molten pool, thereby interfering with the normal metallurgical reaction and increasing the risk of oxidation and inclusion formation, thus reducing the purity and mechanical properties of the weld.

[0042] Therefore, the depressurization protective medium output from the gas storage tank 210 enters the temperature regulating structure 220 under pressure. The temperature regulating structure 220 heats the protective medium, and the heated protective medium is sprayed onto the welding position through the nozzle 120, thereby avoiding the influence of the low-temperature protective medium on the welding.

[0043] To achieve heating of the protective medium via the temperature control structure 220:

[0044] like Figure 5 As shown, the temperature control structure 220 includes a heating box 221 and an electric heating tube 222; the inlet of the heating box 221 is connected to the outlet of the gas storage tank 210, and its outlet is connected to the inlet of the nozzle 120; the electric heating tube 222 is installed inside the heating box 221 and is located on the flow path of the protective medium in the heating box 221, and is used to heat the protective medium.

[0045] In this embodiment, the depressurized protective medium in the gas storage tank 210 enters the nozzle 120 through the heating box 221. During this process, the electric heating tube 222 exchanges heat with the protective medium flowing through the heating box 221, thereby increasing the temperature of the protective medium input into the nozzle 120.

[0046] To improve the heating efficiency of the temperature control structure 220:

[0047] like Figure 5 As shown, the temperature control structure 220 also includes multiple baffles 223; the multiple baffles 223 are all connected inside the heating box 221 to form a baffle channel, which is used to extend the time for the protective medium to flow through the heating box 221.

[0048] In this embodiment, during the process of the protective medium passing through the heating box 221, it needs to pass through a baffle channel composed of multiple baffles 223 to force the protective medium to turn multiple times along the baffle channel, thereby increasing the residence time of the protective medium in the heating box 221, so that the protective medium has more time to absorb heat, thereby improving the heating efficiency of the protective medium.

[0049] In addition, the protective medium breaks the laminar flow state of the protective medium by constantly changing its flow direction in the baffle channel, thereby promoting the mixing of the heated and unheated protective medium and avoiding local overheating or underheating of the protective medium, thus improving the uniformity and stability of the temperature of the protective medium input into the nozzle 120.

[0050] To avoid thermal shock caused by a sudden increase in temperature of the protective medium inside heating chamber 221:

[0051] like Figure 5 As shown, the temperature control structure 220 also includes multiple heating elements 222; the multiple heating elements 222 are all installed in the heating box 221 and are arranged at intervals along the flow direction of the protective medium; the baffle plate 223 is located between adjacent heating elements 222 to guide the protective medium to flow through the multiple heating elements 222 in sequence.

[0052] In this embodiment, by arranging multiple heating tubes 222 at intervals along the flow direction of the protective medium, a multi-stage heating zone is formed in the baffle channel composed of multiple baffles 223. The multi-stage heating zone increases sequentially along the flow direction of the protective medium, thereby allowing the protective medium passing through the baffle channel to be heated in stages. This avoids the low-temperature gas protective medium from being directly exposed to the high-temperature environment, thereby reducing the thermal stress caused by excessive temperature difference and reducing the probability of deformation failure of the heating box 221.

[0053] To preheat the workpiece without wasting the protective medium:

[0054] like Figure 4 As shown, the air supply mechanism 200 also includes an air supply structure 230; the air supply structure 230 includes an axial flow fan 231; the outlet of the axial flow fan 231 is connected to the inlet of the temperature control structure 220; the axial flow fan 231 is configured to send ambient air into the temperature control structure 220, and after being heated by the temperature control structure 220, it is sprayed out by the nozzle 120 to preheat the welding area of ​​the workpiece.

[0055] To prevent the protective medium or ambient air from entering the temperature control structure 220:

[0056] like Figure 4 As shown, the gas supply mechanism 200 also includes a three-way valve 240; the three-way valve 240 has three ports, which are respectively connected to the outlet of the gas storage tank 210, the inlet of the temperature regulating structure 220 and the outlet of the axial flow fan 231.

[0057] To avoid secondary pollution of the sensing body 110 and the workpiece by dust particles in the ambient air:

[0058] like Figure 4 As shown, the air supply structure 230 also includes a dust filter component 232; the dust filter component 232 is connected to the inlet of the axial flow fan 231 and is used to filter dust in the air entering the axial flow fan 231.

[0059] In this embodiment, the ambient air is driven by the axial flow fan 231 to pass through the dust filter component 232 and the axial flow fan 231 in sequence and enter the temperature control structure 220. During this process, the dust filter component 232 separates the dust particles in the air entering the axial flow fan 231, thereby avoiding secondary pollution of the sensing body 110 and the workpiece by the dust particles in the ambient air.

[0060] Next, the temperature control structure 220 heats the internal ambient air. The heated ambient air enters the nozzle 120 and is sprayed onto the surface of the workpiece. The high-temperature ambient air exchanges heat with the workpiece to preheat the workpiece to the set temperature, thereby avoiding the influence of low temperature environment on welding.

[0061] To align the nozzle 120 outlet with the sensing body 110:

[0062] like Figure 3 As shown, the sensing mechanism 100 also includes a stabilizing bracket 130; the stabilizing bracket 130 is fitted onto the nozzle 120 and the sensing body 110, and its material is configured as insulating material, used to fix the outlet direction of the nozzle 120.

[0063] In this embodiment, the nozzle 120 is fixed to the sensing body 110 by the stabilizing bracket 130 so that the outlet of the nozzle 120 is aligned with the sensing body 110. At the same time, by setting the fixed position of the stabilizing bracket 130 near the outlet of the nozzle 120, a supporting force is provided to the nozzle 120 near its outlet, thereby counteracting the deformation stress generated by the heat at the outlet of the nozzle 120 due to its proximity to the sensing body 110, thus preventing the nozzle 120 from moving in the outlet direction.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An electromagnetic induction welding head, characterized in that: Includes a sensing mechanism (100); The sensing mechanism (100) includes a sensing body (110) and a nozzle (120). The nozzle (120) has its outlet facing the sensing body (110) and is configured to spray a protective medium. The flow path of the protective medium covers the sensing body (110) to remove moisture and dust from the sensing body (110) and the two workpiece welding positions, and to form a protective area at the welding position.

2. The electromagnetic induction welding head according to claim 1, characterized in that: It also includes gas supply facilities (200); The gas supply mechanism (200) includes a gas storage tank (210); The protective medium is compressed and stored in the gas storage tank (210). The outlet of the gas storage tank (210) is connected to the nozzle (120) to deliver the protective medium to the nozzle (120).

3. The electromagnetic induction welding head according to claim 2, characterized in that: The gas supply mechanism (200) also includes a temperature regulating structure (220); The inlet of the temperature regulating structure (220) is connected to the gas storage tank (210), and its outlet is connected to the nozzle (120), so that the protective medium in the gas storage tank (210) enters the nozzle (120) through the temperature regulating structure (220). The temperature control structure (220) is configured to heat the protective medium flowing through it to increase the temperature of the protected area.

4. The electromagnetic induction welding head according to claim 3, characterized in that: The temperature control structure (220) includes a heating box (221) and an electric heating element (222); The inlet of the heating box (221) is connected to the outlet of the gas storage tank (210), and its outlet is connected to the inlet of the nozzle (120). The electric heating tube (222) is installed inside the heating box (221) and is located on the flow path of the protective medium in the heating box (221) for heating the protective medium.

5. The electromagnetic induction welding head according to claim 4, characterized in that: The temperature regulating structure (220) also includes multiple baffles (223); Multiple baffles (223) are connected inside the heating box (221) to form a baffle channel, which is used to extend the time for the protective medium to flow through the heating box (221).

6. The electromagnetic induction welding head according to claim 5, characterized in that: The temperature control structure (220) also includes a plurality of the heating elements (222); Multiple heating elements (222) are installed inside the heating box (221) and are spaced apart along the flow direction of the protective medium; The baffle (223) is located between adjacent heating elements (222) to guide the protective medium to flow sequentially through the plurality of heating elements (222).

7. The electromagnetic induction welding head according to claim 3, characterized in that: The gas supply mechanism (200) also includes an air supply structure (230); The air supply structure (230) includes an axial flow fan (231); The outlet of the axial flow fan (231) is connected to the inlet of the temperature control structure (220); The axial flow fan (231) is configured to send ambient air into the temperature control structure (220), and after being heated by the temperature control structure (220), it is sprayed out by the nozzle (120) to preheat the welding area of ​​the workpiece.

8. The electromagnetic induction welding head according to claim 7, characterized in that: The gas supply mechanism (200) also includes a three-way valve (240); The three-way valve (240) has three ports, which are respectively connected to the outlet of the gas storage tank (210), the inlet of the temperature regulating structure (220) and the outlet of the axial flow fan (231).

9. The electromagnetic induction welding head according to claim 8, characterized in that: The air supply structure (230) also includes a dust filter component (232); The dust filter component (232) is connected to the inlet of the axial flow fan (231) and is used to filter dust in the air entering the axial flow fan (231).

10. The electromagnetic induction welding head according to claim 9, characterized in that: The sensing mechanism (100) also includes a stabilizing bracket (130). The stabilizing bracket (130) is fitted onto the nozzle (120) and the sensing body (110), and is made of insulating material to fix the outlet direction of the nozzle (120).

Images