Nozzle assembly, smoking welding torch and welding robot

Abstract

A nozzle assembly, a smoke suction welding torch and a welding robot. The nozzle assembly comprises an inner layer and an outer layer; the inner layer comprises a first annular part and a second annular part arranged and connected in a first direction, the radial dimension of the first annular part in a second direction perpendicular to the first direction gradually decreases in a direction away from the second annular part to form a shielding gas outlet; the outer layer is sleeved on the outer side of the inner layer, at least part of the outer layer is arranged in a spaced manner with the inner layer to form a smoke suction hole between the inner layer and the outer layer; at least part of the outer layer is connected with the inner layer through a plurality of airflow guide structures, the plurality of airflow guide structures are arranged in a spaced manner in the circumferential direction of the inner layer, and the smoke suction hole is divided into a plurality of smoke suction ports. Therefore, the nozzle assembly can have better smoke suction effect and higher smoke suction efficiency, so as to effectively block the contact of welding smoke with the human body and curb its diffusion to the environment.

Description

Technical Field

[0001] This disclosure relates to the field of welding, specifically to a nozzle assembly, a fume extraction welding torch, and a welding robot. Background Technology

[0002] A welding torch is a tool used in welding to transmit electric current, feed welding wire (or welding rod), and generate an electric arc; it is a core component of manual or semi-automatic welding. A welding robot is a programmable automated device capable of completing welding tasks according to preset paths and parameters; it typically consists of a robotic arm, a control system, and a welding torch. Welding robots, equipped with welding torches as end-effectors, can perform various types of welding tasks.

[0003] Welding fumes are submicron-sized particles composed of oxides, salts, and carbonaceous materials formed when the welding wire tip, flux coating, and base metal surface vaporize in the high-temperature zone of an electric arc. The metal vapor and flux decomposition products are oxidized by air, then undergo nucleation, condensation, and aggregation to form these submicron-sized particles. Welding fumes can enter the alveoli through the upper respiratory tract, depositing in the lungs and causing respiratory diseases, pneumoconiosis, and lung cancer. Furthermore, welding fumes also cause environmental pollution. Therefore, how to prevent welding fumes from contacting the human body and curb their diffusion into the environment is a pressing technical problem that needs to be solved in this field. Utility Model Content

[0004] The embodiments disclosed herein aim to provide a nozzle assembly, a fume welding torch, and a welding robot that can block welding fumes from contacting the human body and prevent their diffusion into the environment.

[0005] In a first aspect, embodiments of this disclosure provide a nozzle assembly comprising: an inner layer member including a first annular portion and a second annular portion arranged and connected in a first direction, the first annular portion having a radial dimension that gradually decreases in a direction away from the second annular portion in a second direction perpendicular to the first direction to form a protective gas outlet; an outer layer member sleeved on the outside of the inner layer member, at least a portion of the outer layer member being spaced apart from the inner layer member to form a smoke hole between the outer layer member and the inner layer member; at least a portion of the outer layer member being connected to the inner layer member through a plurality of airflow guiding structures, the plurality of airflow guiding structures being spaced apart in the circumferential direction of the inner layer member to divide the smoke hole into a plurality of smoke openings.

[0006] In this design, at least a portion of the outer layer is spaced apart from the inner layer, forming a fume extraction port between them. This allows welding fumes to be drawn away through the fume extraction port during the welding process. Furthermore, multiple airflow guiding structures also serve a guiding function, efficiently directing welding fumes to multiple fume extraction ports, thereby improving fume extraction efficiency and reducing the spread of welding fumes. Thus, this nozzle assembly can prevent welding fumes from contacting the human body and inhibit their diffusion into the environment.

[0007] Optionally, the outer layer includes a third annular portion sleeved on the outside of the inner layer, and each of the airflow guiding structures includes a support portion and an extension portion. The support portion connects the third annular portion and the inner layer and supports the gap between the third annular portion and the inner layer, and the extension portion extends beyond the third annular portion in the first direction and is configured to guide welding fumes into the fume extraction port.

[0008] In this design, by setting an airflow guiding structure including a support and an extension, the nozzle assembly can achieve multiple smoke inlets in a compact structure, and the airflow guiding structure has high guiding efficiency.

[0009] Optionally, the third annular portion is sleeved on the second annular portion, and the plurality of airflow guiding structures are located on the second annular portion.

[0010] In this design, the third annular part is fitted onto the second annular part, making the internal dimensions of the multiple smoke openings more uniform.

[0011] Optionally, in a direction away from the third annular portion, the height of the extension relative to the inner layer gradually decreases.

[0012] In this design, the height of the extension gradually decreases relative to the inner layer, which can increase the guiding effect on welding fumes and avoid the excessive size of the nozzle assembly due to the excessive size of the airflow guiding structure, thereby avoiding a reduction in the flexibility of the welding torch.

[0013] Optionally, the extension has a dimension greater than 10 mm in the first direction.

[0014] In this scheme, by setting the size of the extension in the first direction to be greater than 10 mm, the guiding effect on welding fumes can be increased.

[0015] Optionally, an anti-slip structure is provided on the surface of the outer layer that is away from the inner layer.

[0016] In this design, an anti-slip structure is provided on the surface of the outer layer that is away from the inner layer, making it convenient for users to install and replace the components.

[0017] Optionally, the cross-sectional area of ​​the smoking hole is greater than 200 square millimeters.

[0018] In this design, by having a cross-sectional area of ​​more than 200 square millimeters for the smoke extraction orifice, the nozzle assembly can achieve high smoke extraction efficiency and capacity, thereby effectively curbing the spread of welding fumes into the environment.

[0019] Optionally, the distance between the smoke inlet and the protective gas outlet in the first direction is 35-45 mm.

[0020] In this design, by setting the distance between the smoke extraction port and the protective gas outlet in the first direction to a range of 35-45 mm, the nozzle assembly can avoid the suction of the smoke extraction port from affecting the protective gas, thereby ensuring excellent welding quality.

[0021] In a second aspect, embodiments of this disclosure also provide a fumigation welding torch, which includes a neck assembly; the neck assembly includes the nozzle assembly described in any of the preceding claims.

[0022] In this design, because the fume extraction welding torch utilizes the aforementioned nozzle assembly, it can efficiently guide welding fumes to multiple fume extraction ports via multiple airflow guiding structures while welding is being performed, thereby improving fume extraction efficiency and reducing the spread of welding fumes. Consequently, this fume extraction welding torch can also prevent welding fumes from contacting the human body and curb their spread into the environment.

[0023] In a third aspect, embodiments of this disclosure also provide a welding robot, comprising: a robot body including a sixth axis; and the aforementioned fumigation welding torch, wherein the torch neck seat is connected to the sixth axis.

[0024] In this solution, because the welding robot uses the aforementioned fume-emitting welding torch, it can also prevent welding fumes from coming into contact with the human body and curb their spread into the environment. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this disclosure and are not intended to limit this disclosure.

[0026] Figure 1 This is a schematic diagram of the structure of a nozzle assembly provided in one embodiment of the present disclosure;

[0027] Figure 2 for Figure 1 Side view of the nozzle assembly shown;

[0028] Figure 3 for Figure 1 The front view of the nozzle assembly shown;

[0029] Figure 4 A schematic diagram of the structure of a fumigation welding torch provided in an embodiment of this disclosure; and

[0030] Figure 5 This is a schematic diagram of the structure of a welding robot provided in one embodiment of the present disclosure. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0032] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0033] Currently, the treatment of welding fumes generated during welding primarily relies on natural ventilation, supplemented by traditional methods such as high-volume local exhaust ventilation, to improve the working environment of welding workshops. However, this method still allows welding fumes to disperse throughout the workplace, failing to prevent contact between the fumes and operators, and causing environmental pollution as the fumes spread into the environment. Furthermore, relying on extensive local exhaust ventilation systems for fume extraction also results in problems such as high noise levels and high power consumption.

[0034] In response, this disclosure provides a nozzle assembly, a fumigation welding torch, and a welding robot. The nozzle assembly includes an inner layer and an outer layer. The inner layer includes a first annular portion and a second annular portion arranged and connected in a first direction. The radial dimension of the first annular portion gradually decreases in a second direction perpendicular to the first direction, away from the second annular portion, to form a protective gas outlet. The outer layer is sleeved on the outside of the inner layer, with at least a portion of the outer layer spaced apart from the inner layer, forming a fumigation port between them. At least a portion of the outer layer is connected to the inner layer through multiple airflow guiding structures, which are spaced apart circumferentially on the inner layer, dividing the fumigation port into multiple fumigation openings. Therefore, this nozzle assembly has a good fumigation effect and high fumigation efficiency, effectively blocking welding fumes from contacting the human body and inhibiting their diffusion into the environment.

[0035] The nozzle assembly, fume extraction torch, and welding robot provided in the embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0036] Figure 1 This is a schematic diagram of the structure of a nozzle assembly provided in one embodiment of the present disclosure; Figure 2 for Figure 1 Side view of the nozzle assembly shown; Figure 3 for Figure 1 The nozzle assembly shown is a front view.

[0037] like Figure 1 and Figure 2 As shown, the nozzle assembly 100 includes an inner layer 110 and an outer layer 120. The inner layer 110 includes a first annular portion 112 and a second annular portion 114 arranged and connected in a first direction; for example, the first annular portion 112 and the second annular portion 114 can be integrally formed; of course, the first annular portion 112 and the second annular portion 114 can also be two separate parts, which are then fixed together by welding or other methods. The radial dimension of the first annular portion 112 in a second direction perpendicular to the first direction gradually decreases in the direction away from the second annular portion 114 to form a protective gas outlet 116; the protective gas outlet 116 is the outlet for the protective gas during the welding process. The protective gas can "push" air away from the arc zone and the surface of the molten pool during the welding process, preventing defects such as gas absorption in the weld and loss of alloying elements. Therefore, the protective gas outlet 116 is also the part of the welding torch that is close to the welding area or the weld. For example, the aforementioned protective gas can be at least one of argon, carbon dioxide, and helium.

[0038] like Figure 1 and Figure 2 As shown, the outer layer 120 is sleeved on the outside of the inner layer 110. At least a portion of the outer layer 120 is spaced apart from the inner layer 110, forming a smoke hole 130 between them. At least a portion of the outer layer 120 is connected to the inner layer through a plurality of airflow guiding structures 140, thereby forming a stable gap between the outer layer 120 and the inner layer 110, namely the smoke hole 130.

[0039] like Figure 1 and Figure 3 As shown, multiple airflow guiding structures 140 are spaced apart in the circumferential direction of the inner layer 110, dividing the smoke hole 130 into multiple smoke openings 135.

[0040] In one application scenario of this nozzle assembly, the nozzle assembly can be installed at the front end of the neck assembly of a fumigation welding torch. The welding wire of the fumigation welding torch can extend from the shielding gas outlet for welding. Simultaneously, the shielding gas is also ejected from the shielding gas outlet. Thus, during the welding process, the shielding gas can "push" air away from the arc zone and the surface of the molten pool, preventing defects such as gas absorption in the weld and loss of alloying elements. During the above welding process, the fumigation port of the nozzle assembly can be connected to a dust removal device, which generates negative pressure to promptly remove the welding fumes generated during the welding process through the fumigation port. It should be noted that the above application scenario is for illustrative purposes only to illustrate the working principle of the nozzle assembly provided in this embodiment. This nozzle assembly can also be applied to other scenarios, and this embodiment does not impose any limitations on it.

[0041] In the nozzle assembly provided in this embodiment, at least a portion of the outer layer is spaced apart from the inner layer, forming a smoke extraction hole between them. This allows the nozzle assembly to form a smoke extraction hole for absorbing welding fumes. Since the shielding gas outlet of the nozzle assembly is located on the welding torch, close to the welding area or weld, the smoke extraction hole formed on the nozzle assembly can draw away the welding fumes before they diffuse, thus achieving a good smoke extraction effect. Furthermore, by providing multiple airflow guiding structures and dividing the smoke extraction hole into multiple smoke inlets, the nozzle assembly can also guide the welding fumes using these structures, efficiently directing them to multiple smoke inlets, thereby improving smoke extraction efficiency and reducing the diffusion of welding fumes. Therefore, the nozzle assembly can prevent welding fumes from contacting the human body and inhibit their diffusion into the environment.

[0042] In some examples, such as Figure 1 and Figure 3 As shown, three airflow guiding structures 140 are evenly spaced in the circumferential direction of the inner layer 110, dividing the smoke hole 130 into three smoke inlets 135. This ensures that the smoke hole has a large cross-sectional area while providing good guiding effect. Of course, this disclosure is not limited to this embodiment, and the number and arrangement of the airflow guiding structures can be changed as needed.

[0043] In some examples, such as Figure 1 and Figure 3 As shown, multiple smoke inlets 135 are arranged around the protective gas outlet 116, thereby allowing the welding fumes generated during welding to be drawn in from all directions.

[0044] In some examples, such as Figure 1 and Figure 2As shown, the outer layer 120 includes a third annular portion 122, which is sleeved on the outside of the inner layer 110; that is, the outer layer 120 is also formed as an annular structure. Each airflow guiding structure 140 includes a support portion 142 and an extension portion 144. The support portion 142 connects the third annular portion 122 and the inner layer 110, and supports the gap between the third annular portion 122 and the inner layer 110, thereby forming the aforementioned smoke inlet 130, and fixing the outer layer 120 to the inner layer 110. The extension portion 144 extends beyond the third annular portion 122 in a first direction and is configured to guide welding fumes into the smoke inlet 130. Thus, by providing an airflow guiding structure including a support portion and an extension portion, the nozzle assembly can achieve a compact structure with multiple smoke inlets, and the airflow guiding structure has high guiding efficiency.

[0045] It should be noted that the support portion may or may not be located between the third annular portion and the inner layer component, as long as it connects the third annular portion and the inner layer component and supports the gap between them. When the support portion is not located between the third annular portion and the inner layer component, the cross-sectional area of ​​the smoke inlet can be increased.

[0046] In some examples, such as Figure 1 and Figure 2 As shown, the third annular portion 122 is fitted onto the second annular portion 114, and multiple airflow guiding structures 140 are located on the second annular portion 114. Since the radial dimension of the second annular portion is uniform, the fitting of the third annular portion onto the second annular portion makes the internal dimensions of the multiple smoke inlets formed more uniform.

[0047] In some examples, such as Figure 1 and Figure 2 As shown, in the direction away from the third annular portion 122, the height of the extension portion 144 relative to the inner layer 110 gradually decreases. This increases the guiding effect on welding fumes while preventing the nozzle assembly from becoming too large due to an excessively large airflow guiding structure, thus avoiding reduced flexibility of the welding torch.

[0048] For example, when welding with a welding torch in narrow channels or areas, if the airflow guide structure is too tall, collisions may occur, reducing the flexibility of the welding torch.

[0049] In some examples, such as Figure 1 and Figure 2 As shown, the dimension L1 of the extension 144 in the first direction is greater than 10 mm. By setting the dimension of the extension in the first direction to be greater than 10 mm, the guiding effect on welding fumes can be increased.

[0050] In some examples, such as Figure 1 and Figure 2 As shown, an anti-slip structure 125 is provided on the surface of the outer layer 120 that is away from the inner layer 110. Therefore, by providing an anti-slip structure on the surface of the outer layer that is away from the inner layer, installation and replacement can be convenient for the user.

[0051] For example, when the outer layer 120 includes a third annular portion 122, the aforementioned anti-slip structure 124 is provided on the outer surface of the third annular portion 122.

[0052] In some examples, the cross-sectional area of ​​the aforementioned fume extraction orifice 130 is greater than 200 square millimeters. By having a cross-sectional area of ​​the fume extraction orifice greater than 200 square millimeters, the nozzle assembly can achieve higher fume extraction efficiency and capacity, thereby effectively curbing the spread of welding fumes into the environment.

[0053] In some examples, such as Figure 1 and Figure 2 As shown, the distance L2 between the fume extraction port 130 and the shielding gas outlet 116 in the first direction ranges from 35 to 45 mm. By setting the distance between the fume extraction port and the shielding gas outlet in the first direction to 35-45 mm, the nozzle assembly avoids the suction force of the fume extraction port from affecting the shielding gas, thereby ensuring excellent welding quality.

[0054] One embodiment of this disclosure also provides a fumigation welding torch. Figure 4 This is a schematic diagram of the structure of a fumigation welding torch provided in one embodiment of this disclosure. Figure 4 As shown, the fumigation welding torch 500 includes a neck assembly 200; the neck assembly 200 includes the aforementioned nozzle assembly 100.

[0055] In the fume extraction welding torch provided in this embodiment, because the welding torch employs the aforementioned nozzle assembly, it can efficiently guide welding fumes to multiple smoke inlets through multiple airflow guiding structures while welding, thereby improving smoke extraction efficiency and reducing the diffusion of welding fumes. Therefore, the welding torch can also prevent welding fumes from contacting the human body and curb their diffusion into the environment.

[0056] One embodiment of this disclosure also provides a welding robot. Figure 5 This is a schematic diagram of the structure of a welding robot provided in one embodiment of this disclosure. Figure 5 As shown, the welding robot 800 includes a sixth axis 860 and the aforementioned fumigation welding torch 500, which is connected to the sixth axis 860.

[0057] In the welding robot provided in this embodiment, the fume extraction torch is connected to the sixth axis, thus enabling the welding robot to complete various types of welding tasks. Furthermore, because the welding robot employs the aforementioned fume extraction torch, it can also prevent welding fumes from contacting the human body and inhibit their spread into the environment.

[0058] In some examples, such as Figure 5 As shown, the welding robot 800 also includes a wire feeder 600 and a dust removal device 700; the wire feeder 600 is connected to the fume extraction torch 500 and configured to feed welding wire to the fume extraction torch 500; the dust removal device 700 is connected to the fume extraction port of the nozzle assembly (see...). Figure 1 They are connected and configured to generate negative pressure to draw in welding fumes through the fume extraction port.

[0059] The following points need to be explained:

[0060] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0061] (2) Where there is no conflict, features of the same embodiment and different embodiments of this disclosure can be combined with each other.

[0062] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A nozzle assembly, characterized in that, include: The inner layer includes a first annular portion and a second annular portion arranged and connected in a first direction, wherein the radial dimension of the first annular portion in a second direction perpendicular to the first direction gradually decreases in the direction away from the second annular portion to form a protective gas outlet; An outer layer is sleeved on the outside of the inner layer, at least a portion of the outer layer is spaced apart from the inner layer, and a smoking hole is formed between the outer layer and the inner layer. At least a portion of the outer layer is connected to the inner layer via a plurality of airflow guiding structures, which are spaced apart in the circumferential direction of the inner layer to divide the smoking hole into a plurality of smoking openings.

2. The nozzle assembly according to claim 1, characterized in that, The outer layer includes a third annular portion, which is sleeved on the outside of the inner layer. Each of the airflow guiding structures includes a support portion and an extension portion. The support portion connects the third annular portion and the inner layer member and supports the gap between the third annular portion and the inner layer member. The extension portion extends beyond the third annular portion in the first direction and is configured to guide welding fumes into the fume extraction hole.

3. The nozzle assembly according to claim 2, characterized in that, The third annular portion is sleeved on the second annular portion, and the plurality of airflow guiding structures are located on the second annular portion.

4. The nozzle assembly according to claim 2, characterized in that, In the direction away from the third annular portion, the height of the extension relative to the inner layer gradually decreases.

5. The nozzle assembly according to claim 2, characterized in that, The extension has a dimension greater than 10 mm in the first direction.

6. The nozzle assembly according to any one of claims 1-5, characterized in that, An anti-slip structure is provided on the surface of the outer layer that is away from the inner layer.

7. The nozzle assembly according to any one of claims 1-5, characterized in that, The cross-sectional area of ​​the smoking hole is greater than 200 square millimeters.

8. The nozzle assembly according to any one of claims 1-5, characterized in that, The distance between the smoke inlet and the protective gas outlet in the first direction ranges from 35 to 45 millimeters.

9. A fumigation welding torch, characterized in that, include: The neck assembly includes the nozzle assembly according to any one of claims 1-8.

10. A welding robot, characterized in that, include: The robot body, including the sixth axis, According to claim 9, the fume extraction welding torch, in, The fumigation welding torch is connected to the sixth axis.

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