A welding torch tip structure

Abstract

The utility model discloses a welding torch nozzle structure, this structure includes the nozzle and the protection cap of screw connection, and the protection cap end is equipped with rotatable carousel, and the carousel center sliding connection leads to the guide bar of strip, and the guide bar end is equipped with knob, and the carousel is in circumferential arrangement multiple clean strips of containing elastic rod and brush head, and the guide bar top is equipped with the guide disc of with inclined guide channel, and the guide disc is connected through the tension spring between the carousel. When pressing knob, clean strip on swing clean nozzle powder channel upper wall surface, and after loosening, the tension spring resets and drives clean strip to swing and clean lower wall surface. The protection cap is connected through internal and external thread with the nozzle, and the depth of clean strip extension can be adjusted. Nozzle powder nozzle and shielding gas nozzle are equipped with cooling water channel. The utility model integrates cleaning and protection function, realizes powder channel all -round cleaning through rotating linkage mechanism, effectively prevents the blockage, and the thread connection structure has sealing protection and depth adjustment effect, and the service life of nozzle is prolonged obviously.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment and spray welding technology, specifically to a welding torch nozzle structure. Background Technology

[0002] Currently, spray welding technology generally employs a non-transfer arc ignition between the cathode and the front gun body, utilizing the generated highly conductive plasma jet to further ignite the transfer arc between the cathode and the workpiece. Once the transfer arc is established, the powder-carrying gas transports the powder into the flame. Under the heating effect of the flame, the powder falls onto the workpiece surface, forming a molten pool, and subsequently generating an alloy spray welding layer. The entire spray welding process typically includes two stages: spraying and remelting, and these two processes are often performed simultaneously. Due to the use of a flexible arc during spray welding, the powder's movement speed is relatively low, and in most cases, it does not completely melt before entering the anode zone of the transfer arc. Once the powder enters the anode zone, it melts rapidly under the influence of high temperature. Simultaneously, the arc exerts a significant stirring effect on the molten pool, which helps to remove gases and slag from the molten metal and promotes partial interfusion between the coating and the substrate metal, ensuring the thorough completion of the remelting process.

[0003] However, during the spraying process, some powder does not completely melt before reaching the anode zone of the transfer arc, easily accumulating at the nozzle and causing blockage. This requires cleaning with a cleaning strip, which is inconvenient. Furthermore, when the welding torch is not in operation, the nozzle is easily contaminated, affecting subsequent welding results; therefore, a special protective cap is needed. Thus, there is an urgent need to design a welding torch nozzle structure that simultaneously meets the requirements of cleaning and protection. Utility Model Content

[0004] The purpose of this utility model is to provide a welding torch nozzle structure that can achieve efficient cleaning of the internal powder channel and protection of the nozzle during welding and post-processing, effectively preventing powder blockage and extending the service life of the nozzle.

[0005] The technical solution adopted by this utility model to solve the above problems is: a welding torch nozzle structure, including a nozzle and a protective cap, wherein a turntable is rotatably provided at the end of the protective cap, a guide rod is slidably provided at the center of the turntable, a plurality of cleaning strips are fixedly provided circumferentially on the inner surface of the turntable, and a knob for driving the turntable to rotate is provided at one end of the guide rod.

[0006] Preferably, one end of the guide rod is provided with a guide plate, and the guide plate has several sets of guide channels that are equally spaced around the circumference and adapted to the sliding of the cleaning strip. The guide channels are obliquely arranged towards the midpoint of the upper surface of the guide plate, and a tension spring is provided between the lower surface of the guide plate and the upper surface of the turntable.

[0007] Preferably, the turntable has a central channel, the guide rod is provided with guide bars around its circumference, the central channel has a guide groove adapted to slide with the guide bars, and the guide rod is connected to the turntable through the central channel in a sliding but non-rotating manner.

[0008] Preferably, the cleaning strip includes an elastic rod and a brush head disposed at the end of the elastic rod.

[0009] Preferably, the nozzle is connected and fixed to the protective cap via a threaded connection structure.

[0010] Preferably, the nozzle is provided with an external thread, and the protective cap is provided with an internal thread that is compatible with it.

[0011] Preferably, the nozzle includes a powder nozzle and a shielding gas nozzle, and both the powder nozzle and the shielding gas nozzle are provided with cooling water channels.

[0012] Compared with the prior art, this utility model has the following advantages and effects:

[0013] This invention utilizes a rotatable turntable at the end of the protective cap, with several cleaning strips circumferentially arranged on the inner surface of the turntable. Combined with the operation of a central guide rod and a knob, it achieves proactive and efficient cleaning of the powder channel inside the nozzle before and after welding, preventing clogging caused by powder accumulation. Through the synergistic action of the guide rod, guide plate, and tension spring, the cleaning strips clean the upper wall of the channel when the knob is pressed and the lower wall when released, achieving comprehensive cleaning of the inner wall of the nozzle's powder channel. Furthermore, the cleaning structure is integrated inside the protective cap, providing a sealed protection for the nozzle when the welding torch is not in operation, effectively preventing dust and impurities from entering the channel and reducing the risk of secondary contamination. The protective cap and nozzle employ a threaded connection structure, which not only enhances assembly stability but also allows for flexible adjustment of the cleaning strip's insertion depth, increasing the cleaning range. Attached Figure Description

[0014] Figure 1 This is an exploded structural diagram of a welding torch nozzle structure according to an embodiment of this utility model.

[0015] Figure 2 This is a cross-sectional view of a welding torch nozzle structure according to an embodiment of this utility model.

[0016] Figure 3 This is a partial exploded view of the protective cap according to an embodiment of the present invention.

[0017] Figure 4 yes Figure 2 A magnified view of the local structure at point A.

[0018] Figure numbers: Nozzle 11, Protective cap 12, Turntable 13, Guide rod 14, Cleaning strip 15, Knob 16, Electrode 21, Powder nozzle 22, Shielding gas nozzle 23, Powder channel 24, Elastic rod 25, Brush head 26, Cooling water channel 27, Upper wall surface 31, Lower wall surface 32, Guide plate 33, Guide channel 34, Tension spring 35, Center channel 36, Guide bar 37, Guide groove 38, External thread 39, Internal thread 40. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0020] Example:

[0021] See Figure 1 - Figure 4 In this embodiment, a welding torch nozzle 11 structure is involved, which is specifically used for cleaning and protection after welding. Specifically, it includes a nozzle 11 and a protective cap 12. A turntable 13 is rotatably provided at the end of the protective cap 12. A guide rod 14 is slidably provided at the center of the turntable 13. A plurality of cleaning strips 15 are fixedly provided circumferentially on the inner surface of the turntable 13. A knob 16 for driving the turntable 13 to rotate is provided at one end of the guide rod 14.

[0022] Specifically, in this embodiment, the nozzle 11 includes, from the center outwards, an electrode 21, a powder nozzle 22, and a shielding gas nozzle 23. A powder channel 24 for spraying powder is provided between the powder nozzle 22 and the shielding gas nozzle 23. After use, the powder channel 24 may become clogged with powder and requires cleaning. First, the protective cap 12 is fitted onto the outside of the nozzle, creating a relatively enclosed space inside the protective cap 12. The user rotates the knob 16 located at the end of the guide rod 14, thereby rotating the turntable 13 located at the end of the protective cap 12. The cleaning strip 15, fixed inside the turntable 13, extends into and rotates within the powder channel 24 to clean it. During rotation, the cleaning strip 15 continuously scrapes along the inner wall of the powder channel 24, peeling off the powder adhering to the wall due to blockage. The peeled powder is collected inside the protective cap 12, and after the protective cap 12 is removed from the nozzle 11, the collected powder is poured out. The protective cap 12 of this utility model not only protects the nozzle 11, but also allows for unclogging and cleaning without the need for an additional cleaning needle. It is simple to operate and easy to maintain in daily life, which helps to extend the service life of the nozzle 11.

[0023] In this embodiment, the cleaning strip 15 includes an elastic rod 25 made of a highly elastic material, and a brush head 26 is provided at the end of the elastic rod 25. The brush head 26 can have different structures such as a sheet or a ball. During the rotation of the turntable 13, the brush head 26 can effectively scrape off the powder adhering to the inner wall of the powder channel 24 through continuous friction.

[0024] Both the powder nozzle 22 and the shielding gas nozzle 23 are provided with cooling water channels 27. By injecting circulating cooling water into the cooling water channels 27, the powder channel 24 between the powder nozzle 22 and the shielding gas nozzle 23 is effectively cooled, which can effectively prevent the powder from melting in the powder channel 24, thus preventing the powder from being blocked or even clogging.

[0025] See Figure 2 and Figure 4 In this embodiment, the powder channel 24 adopts a conical design. To simultaneously clean the upper wall 31 and lower wall 32 of the powder channel 24, a guide plate 33 is provided at one end of the guide rod 14. The guide plate 33 has several sets of guide channels 34 that slide and adapt to the cleaning strip 15 at equal intervals around its circumference. The guide channels 34 are obliquely arranged towards the midpoint of the upper surface of the guide plate 33. A tension spring 35 is provided between the lower surface of the guide plate 33 and the upper surface of the turntable 13. The turntable 13 has a central channel 36. The guide rod 14 has guide strips 37 arranged around its circumference. The central channel 36 has guide grooves 38 that slide and adapt to the guide strips 37. The guide rod 14 is connected to the turntable 13 through the central channel 36 in a sliding but non-rotating manner. When knob 16 is pressed, guide rod 14 slides along central channel 36, causing guide plate 33 to push upward against the elastic force of tension spring 35. Since the upper opening of guide channel 34 is angled towards the center of upper surface of guide plate 33, cleaning strip 15 swings upward. At this time, brush head 26 can contact upper wall surface 31 of powder channel 24. Rotating knob 16 while pressing achieves cleaning of upper wall surface 31 of powder channel 24. Similarly, when knob 16 is released, guide plate 33 is pulled downward under the elastic restoring force of tension spring 35, and cleaning strip 15 swings downward under the limiting action of guide channel 34, causing brush head 26 to contact lower wall surface 32 of powder channel 24. Therefore, rotating knob 16 without pressing can achieve cleaning of lower wall surface 32 of powder channel 24.

[0026] The nozzle 11 is connected and fixed to the protective cap 12 via a threaded connection structure. In this embodiment, the nozzle 11 is provided with an external thread 39, and the protective cap 12 is provided with a matching internal thread 40. The threaded connection structure in this embodiment not only serves its connecting function but also allows adjustment of the insertion length of the cleaning strip 15 relative to the powder channel 24. As the thread engagement length increases, the protective cap 12 and nozzle 11 are connected more tightly, and the depth of the cleaning strip 15 extending into the powder channel 24 increases accordingly, thereby covering a wider area when clearing clogged powder. Conversely, shortening the engagement length reduces the insertion depth of the cleaning strip 15 to meet shallower cleaning requirements. This ensures a secure connection and sealing protection between the nozzle 11 and the protective cap 12, preventing the intrusion of external dust and impurities, while also allowing the user to flexibly adjust the working range of the cleaning strip 15 during cleaning, improving cleaning efficiency and extending the equipment's service life.

[0027] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.

Claims

1. A welding torch nozzle structure, comprising a nozzle and a protective cap, characterized in that, The protective cap has a turntable rotatably mounted at its end, a guide rod slidably mounted at the center of the turntable, and several cleaning strips fixedly mounted circumferentially on the inner surface of the turntable. One end of the guide rod is equipped with a knob to drive the turntable to rotate.

2. The welding torch nozzle structure according to claim 1, characterized in that: One end of the guide rod is provided with a guide plate. The guide plate has several sets of guide channels that are equidistant from each other and are adapted to slide with the cleaning strip. The guide channels are obliquely arranged towards the midpoint of the upper surface of the guide plate. A tension spring is provided between the lower surface of the guide plate and the upper surface of the turntable.

3. The welding torch nozzle structure according to claim 1, characterized in that: The turntable has a central channel, and the guide rod is circumferentially provided with guide bars. The central channel has a guide groove that is adapted to slide with the guide bars. The guide rod is connected to the turntable through the central channel and slides but does not rotate relative to it.

4. The welding torch nozzle structure according to claim 1, characterized in that: The cleaning strip includes a flexible rod and a brush head disposed at the end of the flexible rod.

5. The welding torch nozzle structure according to claim 1, characterized in that: The nozzle is connected and fixed to the protective cap via a threaded connection structure.

6. The welding torch nozzle structure according to claim 3, characterized in that: The nozzle is provided with external threads, and the protective cap is provided with internal threads that are compatible with it.

7. The welding torch nozzle structure according to claim 1, characterized in that: The nozzle includes a powder nozzle and a shielding gas nozzle, both of which are provided with cooling water channels.

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