Protective device for mining machinery welding

Abstract

The invention discloses a protection device for mining machinery welding, and relates to the technical field of machinery welding protection, the protection device comprises a handle and a gun body, one end of the handle is fixedly connected with the gun body, the inner side of the gun body is in threaded connection with a connecting body, and the inner side of the connecting body is fixedly connected with a tungsten needle clamping pipe; a tungsten needle is fixedly connected to the inner side of the tungsten needle clamping pipe, a gas compensation mechanism is arranged on the outer side of the gun body, a nozzle is arranged at the bottom of the gas compensation mechanism, the nozzle is arranged on the outer side of the tungsten needle, a reset mechanism is arranged on the inner side of the nozzle, and the gas compensation mechanism is arranged. The mechanism can drive the nozzle to generate an offset towards the blowing direction (namely the windward direction) of wind; a hedging angle is formed between the ejection axis of the protective gas and the wind direction, so that gas loss caused by wind drift is actively compensated; and finally, wrapping type stable covering of the protective air curtain on the welding area is achieved, and the welding quality is ensured.

Description

Technical Field

[0001] This invention relates to the field of mechanical welding protection technology, and in particular to a protective device for welding mining machinery. Background Technology

[0002] Mining machinery, also known as mining equipment, refers to a series of specialized technical equipment, machines, and facilities used throughout the entire process of mineral resource extraction. Its core function is to replace or enhance human labor to safely, efficiently, and economically complete various operations involving the extraction of useful minerals from the earth's crust and their preliminary processing.

[0003] Mining machinery operates in high-impact, high-wear, and dusty mining areas for extended periods. Components (such as bucket teeth, frames, and conveyor chutes) are prone to cracking and breakage due to collisions and wear. Because mining areas are far from workshops and the equipment is large, repairs must be performed directly on-site in the open-pit mine. This type of outdoor welding often uses argon arc welding, but mining areas are mostly open, with wind speeds often reaching 3-5 levels (or even higher). Strong airflows directly disperse the argon gas shielding layer in the welding area. The shielding gas, which should evenly cover the molten pool and heat-affected zone, is blown towards the weld, causing air (oxygen and nitrogen) to intrude into the welding area. This leads to defects such as porosity, oxide inclusions, and cracks in the weld, severely impacting repair quality and the equipment's future lifespan. Existing argon arc welding torches cannot dynamically compensate for the shielding gas based on wind speed and direction. Therefore, a protective device for welding mining machinery is proposed to address these issues. Summary of the Invention

[0004] The purpose of this invention is to provide a protective device for welding mining machinery to solve the problems in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A protective device for welding mining machinery includes a handle and a gun body. One end of the handle is fixedly connected to the gun body. A connecting body is threadedly connected to the inner side of the gun body. A tungsten needle clamp is fixedly connected to the inner side of the connecting body. A tungsten needle is fixedly connected to the inner side of the tungsten needle clamp. A gas compensation mechanism is located on the outer side of the gun body. A nozzle is provided at the bottom of the gas compensation mechanism and is located outside the tungsten needle. A reset mechanism is provided inside the nozzle, and one end of the reset mechanism is fixedly connected to the tungsten needle clamp. An anti-turbulence mechanism is provided around the nozzle. A long tail cap is spirally connected to the top of the gun body. One end of the gas compensation mechanism is connected to an air inlet pipe, which passes through the inner side of the handle. A solenoid valve is connected to the outer side of the air inlet pipe. A controller is fixedly connected to one end of the handle.

[0006] Preferably, the gas compensation mechanism includes a guide ring fixedly connected to the nozzle, an adjusting cylinder rotatably connected to the outer side of the guide ring, an adjusting rod movably arranged on the inner side of the adjusting cylinder, a ball bearing rotatably connected to one end of the adjusting rod, and the adjusting rod contacts the adjusting cylinder through the ball bearing, a rotating component is provided at one end of the adjusting rod, a longitudinal moving component is provided at one end of the rotating component, and the longitudinal moving component is fixedly connected to the gun body.

[0007] Preferably, a locking screw is threaded to the inner side of one end of the adjusting cylinder, and the locking screw is in contact with the guide ring.

[0008] Preferably, the longitudinal moving component includes a top ring fixedly connected to the gun body, an electric push rod fixedly connected to the top end of the top ring, a fixed ring fixedly connected to the movable end of the electric push rod, a support ring fixedly connected to the bottom end of the fixed ring, and the support ring is rotatably connected to the rotating component. A guide shaft is fixedly connected to the top end of the fixed ring, and the guide shaft is slidably connected to the top ring.

[0009] Preferably, the rotating assembly includes a bottom ring rotatably connected to a support ring, a limit ring fixedly connected to the top end of the bottom ring and rotatably connected to the support ring, a rotating ring fixedly connected to the outer side of the bottom ring and rotatably connected to the support ring, and the rotating ring fixedly connected to an adjusting rod, a motor fixedly connected to one end of the support ring, a gear fixedly connected to the end of the motor's main shaft, a gear meshing with a gear ring at one end of the gear and fixedly connected to the limit ring.

[0010] Preferably, a sealing cylinder is fixedly connected to one end of the top ring, and the other end of the sealing cylinder is fixedly connected to the adjusting cylinder.

[0011] Preferably, the reset mechanism includes a second connecting seat fixedly connected to the nozzle, an outer cylinder rotatably connected to the inner side of the second connecting seat, an inner shaft slidably connected to the inner side of the outer cylinder, a first connecting seat rotatably connected to the other end of the inner shaft, and the first connecting seat fixedly connected to the tungsten needle clamp tube. A first spring is provided on the outer side of the inner shaft, and the two ends of the first spring are fixedly connected to the inner shaft and the outer cylinder, respectively.

[0012] Preferably, the anti-turbulence mechanism includes a guide plate fixedly connected to the nozzle, a connecting rod slidably connected to the inner side of the guide plate, a flow guide plate fixedly connected to the other end of the connecting rod, and the flow guide plate slidably connected to the nozzle. A second spring is provided on the outer side of the connecting rod, and the two ends of the second spring are fixedly connected to the guide plate and the connecting rod, respectively.

[0013] Preferably, the guide plate includes an inclined portion, and the inclined portion is parallel to the end section of the tungsten needle.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. A protective device for welding in mining machinery, equipped with a gas compensation mechanism. When welding outdoors in a windy environment, the mechanism can drive the nozzle to deflect in the direction of the wind (i.e., the windward direction). This causes the ejection axis of the protective gas to form an opposing angle with the wind direction, thereby actively compensating for the gas loss caused by wind drift. Ultimately, the protective gas curtain achieves a stable "wrapping" coverage of the welding area, ensuring welding quality.

[0015] 2. A protective device for welding in mining machinery, equipped with a reset mechanism, which automatically maintains the nozzle in its default position in a windless environment, ensuring that the tungsten electrode is precisely centered on the nozzle; this is intended to ensure that the protective gas forms a uniform and symmetrical ideal gas curtain, providing optimal protection conditions for conventional welding.

[0016] 3. A protective device for welding mining machinery, equipped with an anti-turbulence mechanism. When the nozzle position is adjusted due to wind deflection, the ejection path of the protective gas is easily changed, which may generate turbulence and disrupt the uniformity of the protective gas curtain. The anti-turbulence mechanism optimizes the airflow guidance to guide the gas to form a stable laminar flow, ensuring that the protective gas continuously and uniformly covers the welding area, and avoiding the problem of protection failure caused by airflow turbulence. Attached Figure Description

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Figure 1 This is a schematic diagram of the overall structure of a protective device for welding mining machinery according to the present invention.

[0019] Figure 2 This is a schematic diagram of the installation structure of the sealing cylinder of a protective device for welding mining machinery according to the present invention.

[0020] Figure 3 This is a schematic diagram of the installation structure of the reset mechanism of a protective device for welding mining machinery according to the present invention.

[0021] Figure 4 This is a schematic diagram of the installation structure of the gas compensation mechanism of a protective device for welding mining machinery according to the present invention.

[0022] Figure 5 This is a side view of the installation structure of the adjusting rod of a protective device for welding mining machinery according to the present invention.

[0023] Figure 6This is a schematic diagram of the explosive installation structure of the gas compensation mechanism of a protective device for welding mining machinery according to the present invention.

[0024] Figure 7 This is a schematic diagram of the ball bearing installation structure of a protective device for welding mining machinery according to the present invention.

[0025] Figure 8 This is a schematic diagram of the installation structure of the reset mechanism of a protective device for welding mining machinery according to the present invention.

[0026] Figure 9 This is a schematic diagram of the installation structure of the anti-turbulence mechanism of a protective device for welding mining machinery according to the present invention.

[0027] In the diagram: 1. Gas compensation mechanism; 101. Top ring; 102. Fixed ring; 103. Support ring; 104. Limiting ring; 105. Rotating ring; 106. Bottom ring; 107. Gear ring; 108. Motor; 109. Gear; 110. Adjusting rod; 111. Ball bearing; 112. Adjusting cylinder; 113. Guide ring; 114. Sealing cylinder; 115. Guide shaft; 116. Electric push rod; 117. Locking screw; 2. Reset mechanism; 201. Outer cylinder; 202. Inner shaft; 203. First spring; 204. First connecting seat; 205. Second connecting seat; 3. Anti-turbulence mechanism; 301. Guide plate; 30101. Inclined part; 302. Guide plate; 303. Connecting rod; 304. Second spring; 4. Handle; 5. Controller; 6. Solenoid valve; 7. Air inlet pipe; 8. Long tail cap; 9. Gun body; 10. Connector; 11. Tungsten needle clamp; 12. Tungsten needle; 13. Nozzle. Detailed Implementation

[0028] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the specific embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size. At the same time, all precision instruments such as lead screws, screws, gears, racks, etc. are provided with protective structures such as protective covers. As these are common knowledge, they are not described in detail in the specification. It is understandable for those skilled in the art that some common structures and their descriptions may be omitted in the drawings. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] To make the technical means, creative features, objectives, and effects of this invention easier to understand, it should be noted in the description of this invention that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The invention will be further described below in conjunction with specific embodiments.

[0030] Example

[0031] like Figures 1-9 As shown, a protective device for welding mining machinery includes a handle 4 and a gun body 9. One end of the handle 4 is fixedly connected to the gun body 9. A connecting body 10 is threadedly connected to the inner side of the gun body 9. A tungsten needle clamp 11 is fixedly connected to the inner side of the connecting body 10. A tungsten needle 12 is fixedly connected to the inner side of the tungsten needle clamp 11. A gas compensation mechanism 1 is located on the outer side of the gun body 9. A nozzle 13 is located at the bottom of the gas compensation mechanism 1. When welding in windless conditions, the initial position of the tungsten needle 12 and nozzle 13 is that the tungsten needle 12 is positioned at the center of the nozzle 13, and the nozzle 13 is located outside the tungsten needle 12. A reset mechanism 2 is located inside the nozzle 13, and one end of the reset mechanism 2 is fixedly connected to the tungsten needle clamp 11. An anti-turbulence mechanism 3 is located around the nozzle 13. A long tail cap 8 is spirally connected to the top of the gun body 9. One end of the gas compensation mechanism 1 is connected to an air inlet pipe 7. The air inlet pipe 7 passes through the inside of the handle 4, and the outside of the air inlet pipe 7 is connected to the solenoid valve 6. The solenoid valve 6 can automatically control the air intake of the air inlet pipe 7 and adjust it in real time according to the wind speed. One end of the handle 4 is fixedly connected to the controller 5. The controller 5 is connected to the wind speed and direction tester through a signal transmission line. The wind speed and direction tester is existing technology and will not be described in detail here. It can monitor the wind speed and direction of the welding environment in real time. The controller 5 has a PLC program preset inside. This program is used to coordinate the collaborative work of the gas compensation mechanism 1, the wind speed and direction tester and the solenoid valve 6. It enables the controller 5 to automatically control the gas compensation mechanism 1 to perform corresponding actions (such as driving the nozzle 13 to deflect) according to the real-time wind speed and direction data fed back by the wind speed and direction tester, and synchronously adjust the opening and closing or opening degree of the solenoid valve 6, thereby realizing the precise linkage between the protective gas adjustment and the nozzle 13 posture. Based on a preset PLC program, controller 5 constructs a complete control logic of "real-time monitoring - intelligent decision-making - precise execution - closed-loop calibration": the wind speed and direction tester collects wind speed and direction data of the welding environment in real time and transmits it to controller 5; controller 5 first filters the wind direction data, determines the windward offset direction of nozzle 13 by dividing it into 8 wind direction quadrants (e.g., north wind corresponds to due north offset), and then dynamically calculates the offset amount in combination with wind speed (the base value is taken when the wind speed is ≤3m / s, and linearly increases when it is 3-6m / s); then it sends a control signal to gas compensation mechanism 1 to drive nozzle 13 to move along the determined direction to the target offset position, and at the same time, the position information is fed back in real time through the displacement sensor built into the mechanism. Controller 5 compares the target value with the actual value and makes fine adjustments (triggered when the deviation is >0.2mm), and finally realizes the precise offset of nozzle 13 in the windward direction, maximizing the wind resistance stability of the protective gas through the "counteracting" effect.

[0032] As a further improvement to the present invention, such as Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the gas compensation mechanism 1 includes a guide ring 113 fixedly connected to the nozzle 13. An adjusting cylinder 112 is rotatably connected to the outer side of the guide ring 113. The adjusting cylinder 112 is inverted conical in shape to facilitate subsequent offset by the compression of the balls 111. An adjusting rod 110 is movably arranged inside the adjusting cylinder 112. One end of the adjusting rod 110 is rotatably connected to the balls 111, and the adjusting rod 110 contacts the adjusting cylinder 112 through the balls 111. The balls 111 reduce the friction between the adjusting rod 110 and the adjusting cylinder 112. A rotating component is provided at one end of the adjusting rod 110, and a longitudinal moving component is provided at the other end of the rotating component. The longitudinal moving component is connected to the nozzle... The body 9 is fixedly connected. When it is necessary to adjust the offset and offset direction of the nozzle 13, the operation process is as follows: First, the longitudinal moving component drives the adjusting rod 110 and the ball 111 to press the adjusting cylinder 112 downward. Under the pressing action of the ball 111, the adjusting cylinder 112 shifts to one side. At the same time, the guide ring 113 drives the nozzle 13 to shift to the same side synchronously, thereby completing the adjustment of the offset. Then, the rotating component drives the adjusting rod 110 and the ball 111 to rotate circumferentially along the inner wall of the adjusting cylinder 112. Through the circumferential position change of the adjusting rod 110 and the ball 111, the nozzle 13 is driven to adjust the offset direction synchronously, thereby accurately adapting to different wind directions and realizing the adjustment of the offset direction.

[0033] As a further improvement to the present invention, such as Figure 5As shown, a locking screw 117 is threaded onto the inner side of one end of the adjusting cylinder 112, and the locking screw 117 is in contact with the guide ring 113. Through the friction between the locking screw 117 and the guide ring 113, it can be ensured that there will be no relative rotation between the adjusting cylinder 112 and the guide ring 113, thereby ensuring that the adjusting cylinder 112 can move normally with the nozzle 13.

[0034] As a further improvement to the present invention, such as Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, the longitudinal moving assembly includes a top ring 101 fixedly connected to the gun body 9. An electric push rod 116 is fixedly connected to the top of the top ring 101. A fixed ring 102 is fixedly connected to the movable end of the electric push rod 116. A support ring 103 is fixedly connected to the bottom end of the fixed ring 102, and the support ring 103 is rotatably connected to the rotating assembly. A guide shaft 115 is fixedly connected to the top of the fixed ring 102, and the guide shaft 115 is slidably connected to the top ring 101. When it is necessary to drive the adjusting rod 110 and the ball bearing 111 to move in the vertical direction, the electric push rod 116 is activated. Its telescopic end is sequentially connected to the rotating assembly through the fixed ring 102 and the support ring 103 and transmits power, ultimately driving the adjusting rod 110 and the ball bearing 111 to move synchronously in the vertical direction.

[0035] As a further improvement to the present invention, such as Figure 5 and Figure 6 As shown, the rotating assembly includes a bottom ring 106 rotatably connected to a support ring 103. A limit ring 104 is fixedly connected to the top end of the bottom ring 106, and the limit ring 104 is rotatably connected to the support ring 103. A rotating ring 105 is fixedly connected to the outer side of the bottom ring 106, and is rotatably connected to the support ring 103. The rotating ring 105 is fixedly connected to an adjusting rod 110. A motor 108 is fixedly connected to one end of the support ring 103. A gear 109 is fixedly connected to the end of the main shaft of the motor 108, and one end of the gear 109 is engaged. There is a gear ring 107, which is fixedly connected to the limiting ring 104. When it is necessary to drive the adjusting rod 110 and the ball 111 to rotate circumferentially along the inner wall of the adjusting cylinder 112, the motor 108 is started, and its output shaft directly drives the gear 109 to rotate. The gear 109 drives the gear ring 107 through meshing transmission, and then sequentially links the limiting ring 104, the bottom ring 106 and the rotating ring 105. Finally, the rotating ring 105 drives the adjusting rod 110 and the ball 111 to rotate circumferentially along the inner wall of the adjusting cylinder 112.

[0036] As a further improvement to the present invention, such as Figure 2 and Figure 5As shown, a sealing cylinder 114 is fixedly connected to one end of the top ring 101, and the other end of the sealing cylinder 114 is fixedly connected to the adjusting cylinder 112. The sealing cylinder 114 is made of high-temperature resistant rubber cloth, which is sleeved on the top of the adjusting cylinder 112 and forms a sealing structure. It can tightly seal the potential air leakage hole at the top of the adjusting cylinder 112, ensuring that the protective gas can only be delivered to the nozzle 13 from the bottom outlet along the internal channel of the adjusting cylinder 112. At the same time, the rubber cloth has excellent flexibility and can bend, stretch and deform synchronously with the offset movement of the adjusting cylinder 112, without hindering the normal offset stroke of the adjusting cylinder 112, thus taking into account both sealing reliability and adjustment flexibility.

[0037] Currently, construction sites commonly use passive wind protection measures such as windbreaks and wind shelters, or simply increasing gas flow. Passive measures only weaken the wind, and wind shelters severely obstruct operational visibility and flexibility. Simply increasing the flow rate can easily create turbulence at high wind speeds, rapidly deteriorating the protective effect. This invention, through dynamic counterbalancing, can fundamentally offset the impact of wind, achieving a qualitative leap in protection. This is of irreplaceable value for ensuring the quality of on-site repair welds on large critical structural components in mines, avoiding secondary equipment damage and even major safety accidents caused by welding defects. The comprehensive benefits it brings (first-pass yield, equipment lifespan, and safety) far exceed the cost increase of the device itself. Meanwhile, the main target application scenario of this device is the on-site repair of high-value core components of mining machinery (such as hydraulic support structural components, excavator booms, mining truck bridges, etc.). In such scenarios, the reliability of welding quality is the primary consideration, and there is a clear and urgent need for high-end process equipment with excellent wind resistance. Meanwhile, in order to address the characteristics of high dust levels and harsh working conditions in mining sites, and the problem that moving parts are prone to wear and jamming due to dust intrusion, a sealing cylinder 114 made of high-temperature resistant rubber cloth was specially designed. This component not only seals the air passage, but also forms a complete physical barrier, which can effectively prevent external dust and splashes from entering the internal moving pairs of the gas compensation mechanism 1 (such as the contact area between the adjusting rod 110, the ball 111 and the adjusting cylinder 112). Furthermore, key moving parts (such as the adjusting cylinder 112 and the ball 111) can be made of surface-hardened steel or copper-based wear-resistant alloys, and wear compensation space is reserved in the design, resulting in a long service life.

[0038] As a further improvement to the present invention, such as Figure 5 and Figure 8As shown, the reset mechanism 2 includes a second connecting seat 205 fixedly connected to the nozzle 13. An outer cylinder 201 is rotatably connected to the inner side of the second connecting seat 205. An inner shaft 202 is slidably connected to the inner side of the outer cylinder 201. A first connecting seat 204 is rotatably connected to the other end of the inner shaft 202, and the first connecting seat 204 is fixedly connected to the tungsten needle clamp tube 11. A first spring 203 is provided on the outer side of the inner shaft 202, and both ends of the first spring 203 are fixedly connected to the inner shaft 202 and the outer cylinder 201, respectively. There are four reset mechanisms 2 in total, which are evenly distributed and installed inside the nozzle 13. When the gas compensation mechanism 1 is not working, the first springs 203 in the four directions exert their elastic force, causing the inner shaft 202, outer cylinder 201, first connecting seat 204 and second connecting seat 205 to work together to stabilize and limit the nozzle 13 in the initial position, thereby ensuring that the tungsten needle 12 is accurately centered in the nozzle 13. When the nozzle 13 is driven to deviate by the gas compensation mechanism 1, it will cause the outer cylinder 201 and inner shaft 202 to slide relative to each other through the second connecting seat 205. At this time, the first springs 203 are stretched or compressed in the direction of deviation, storing elastic force for subsequent reset.

[0039] As a further improvement to the present invention, such as Figure 2 , Figure 3 and Figure 9 As shown, the anti-turbulence mechanism 3 includes a guide plate 302 fixedly connected to the nozzle 13. A connecting rod 303 is slidably connected to the inner side of the guide plate 302. A guide plate 301 is fixedly connected to the other end of the connecting rod 303, and the guide plate 301 is slidably connected to the nozzle 13. A second spring 304 is provided on the outer side of the connecting rod 303, and the two ends of the second spring 304 are fixedly connected to the guide plate 302 and the connecting rod 303 respectively. There are four guide plates 301, which are evenly distributed on the inner side of the nozzle 13. The protective gas delivered by the air inlet pipe 7 to the inner side of the nozzle 13 through the regulating cylinder 112 will first enter the annular diversion channel formed by the four guide plates 301. The streamlined surface of each guide plate 301 "cuts" the airflow and guides it to flow smoothly along the plate surface, avoiding turbulence caused by collisions and swirls inside the nozzle 13. At the same time, the symmetrical distribution of the four guide plates 301 can evenly divide the airflow into four sub-flows. During the flow process, each sub-flow does not interfere with the others due to the isolation effect of the guide plates 301, and the flow velocity is consistent (flow velocity difference ≤ 0.5 m / s), effectively avoiding eddies caused by uneven local airflow velocity. Finally, the four sub-flows merge into a complete and stable laminar air curtain at the nozzle 13 outlet, accurately covering the welding area and solving the airflow turbulence problem that may occur when the nozzle 13 is deflected.

[0040] As a further improvement to the present invention, such as Figure 3 and Figure 9As shown, the guide plate 301 includes an inclined portion 30101, which is parallel to the end section of the tungsten needle 12, facilitating the fit between the guide plate 301 and the end of the tungsten needle 12. Simultaneously, a portion of the connecting rod 303 is inclined. When welding is completed and it is necessary to clean the welding slag and other foreign matter attached to the end of the tungsten needle 12, the operator presses the connecting rod 303, causing the guide plate 301 to swing obliquely downwards towards the tungsten needle 12 until the cleaning teeth of the guide plate 301 are tightly fitted to the surface of the tungsten needle 12. At the same time, the locking screw 117 is loosened, disengaging it from the guide ring 113 and releasing the rotational constraint. Subsequently, the operator holds the nozzle 13 to rotate the guide plate 301 around the vertical centerline of the tungsten needle 12, using the cleaning teeth on the inner side of the guide plate 301 to scrape and clean the welding slag, oxide layer, and other foreign matter on the surface of the tungsten needle 12.

[0041] Meanwhile, the 301 guide vane can be made of cemented carbide with a hardness of HRA89-90 (equivalent to Rockwell hardness 65-67HRC), which has excellent wear resistance and high temperature resistance (short-term temperature resistance can reach over 1000℃). It can withstand the high temperature impact and scratches of welding slag, and has outstanding resistance to welding slag damage. Its lifespan is 5-10 times that of ordinary steel. In addition to cemented carbide, engineering ceramics (alumina ceramics, silicon nitride ceramics) can also be selected.

[0042] Regardless of the material chosen, a nano-ceramic coating (such as a CrN coating) can be applied to the key parts of the 301 guide plate that are prone to contact with welding slag (such as the guide surface) to further improve anti-adhesion and wear resistance, and extend the service life by 30%-50%.

[0043] The above are preferred embodiments of the present invention. The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from the scope of protection of the present invention. All such changes and modifications fall within the scope of protection of the present invention as defined by the appended claims and their equivalents.

Claims

1. A protective device for welding mining machinery, comprising a handle (4) and a welding torch (9), characterized in that: One end of the handle (4) is fixedly connected to the gun body (9). A connecting body (10) is threaded onto the inner side of the gun body (9). A tungsten needle clamp tube (11) is fixedly connected to the inner side of the connecting body (10). A tungsten needle (12) is fixedly connected to the inner side of the tungsten needle clamp tube (11). A gas compensation mechanism (1) is located on the outer side of the gun body (9). A nozzle (13) is located at the bottom of the gas compensation mechanism (1), and the nozzle (13) is located on the outer side of the tungsten needle (12). The nozzle (13)... A reset mechanism (2) is provided on the inner side, and one end of the reset mechanism (2) is fixedly connected to the tungsten needle clamp tube (11). An anti-turbulence mechanism (3) is provided around the nozzle (13). A long tail cap (8) is spirally connected to the top of the gun body (9). One end of the gas compensation mechanism (1) is connected to an air inlet pipe (7), and the air inlet pipe (7) passes through the inside of the handle (4). An electromagnetic valve (6) is connected to the outside of the air inlet pipe (7). A controller (5) is fixedly connected to one end of the handle (4).

2. The protective device for welding mining machinery according to claim 1, characterized in that: The gas compensation mechanism (1) includes a guide ring (113) fixedly connected to the nozzle (13). An adjusting cylinder (112) is rotatably connected to the outer side of the guide ring (113). An adjusting rod (110) is movably arranged on the inner side of the adjusting cylinder (112). A ball bearing (111) is rotatably connected to one end of the adjusting rod (110), and the adjusting rod (110) contacts the adjusting cylinder (112) through the ball bearing (111). A rotating component is provided at one end of the adjusting rod (110), and a longitudinal moving component is provided at one end of the rotating component. The longitudinal moving component is fixedly connected to the gun body (9).

3. The protective device for welding mining machinery according to claim 2, characterized in that: One end of the adjusting cylinder (112) is threaded with a locking screw (117), and the locking screw (117) is in contact with the guide ring (113).

4. The protective device for welding mining machinery according to claim 2, characterized in that: The longitudinal moving assembly includes a top ring (101) fixedly connected to the gun body (9). An electric push rod (116) is fixedly connected to the top of the top ring (101). A fixed ring (102) is fixedly connected to the movable end of the electric push rod (116). A support ring (103) is fixedly connected to the bottom end of the fixed ring (102). The support ring (103) is rotatably connected to the rotating assembly. A guide shaft (115) is fixedly connected to the top of the fixed ring (102). The guide shaft (115) is slidably connected to the top ring (101).

5. The protective device for welding mining machinery according to claim 4, characterized in that: The rotating assembly includes a bottom ring (106) rotatably connected to a support ring (103). A limiting ring (104) is fixedly connected to the top of the bottom ring (106), and the limiting ring (104) is rotatably connected to the support ring (103). A rotating ring (105) is fixedly connected to the outside of the bottom ring (106) and is rotatably connected to the support ring (103). The rotating ring (105) is fixedly connected to an adjusting rod (110). A motor (108) is fixedly connected to one end of the support ring (103). A gear (109) is fixedly connected to the end of the main shaft of the motor (108). A gear ring (107) meshes with one end of the gear (109), and the gear ring (107) is fixedly connected to the limiting ring (104).

6. The protective device for welding mining machinery according to claim 4, characterized in that: One end of the top ring (101) is fixedly connected to a sealing cylinder (114), and the other end of the sealing cylinder (114) is fixedly connected to an adjusting cylinder (112).

7. The protective device for welding mining machinery according to claim 1, characterized in that: The reset mechanism (2) includes a second connecting seat (205) fixedly connected to the nozzle (13). An outer cylinder (201) is rotatably connected to the inner side of the second connecting seat (205). An inner shaft (202) is slidably connected to the inner side of the outer cylinder (201). A first connecting seat (204) is rotatably connected to the other end of the inner shaft (202). The first connecting seat (204) is fixedly connected to the tungsten needle clamp tube (11). A first spring (203) is provided on the outer side of the inner shaft (202). The two ends of the first spring (203) are fixedly connected to the inner shaft (202) and the outer cylinder (201) respectively.

8. The protective device for welding mining machinery according to claim 1, characterized in that: The anti-turbulence mechanism (3) includes a guide plate (302) fixedly connected to the nozzle (13). A connecting rod (303) is slidably connected to the inner side of the guide plate (302). A flow guide plate (301) is fixedly connected to the other end of the connecting rod (303). The flow guide plate (301) is slidably connected to the nozzle (13). A second spring (304) is provided on the outer side of the connecting rod (303). The two ends of the second spring (304) are fixedly connected to the guide plate (302) and the connecting rod (303) respectively.

9. A protective device for welding mining machinery according to claim 8, characterized in that: The guide plate (301) includes an inclined portion (30101), and the inclined portion (30101) is parallel to the end section of the tungsten needle (12).

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