A semi-automatic electric arc welding device for compensator material processing

Abstract

The application relates to the technical field of arc welder accessory, in particular to a semi-automatic arc welding device for compensator material processing, which comprises a welder main machine, a front side panel, a plurality of adjusting knobs, a potentiometer and a two-position two-way mechanical cut-off valve, a protective shell is installed on the front side panel, a plurality of knob protection assemblies are arranged on the protective shell, and a pushing assembly is arranged in the protective shell; a pushing buffer assembly is arranged on the potentiometer; the semi-automatic arc welding device for compensator material processing can avoid parameter deviation caused by workshop vibration, workpiece collision and personnel mis-touch, reduce quality defects such as uneven weld seam depth and excessive spatter during compensator welding, stabilize the welding quality of finished products, and only maintain the long-pressing state to push the valve rod and open the two-position two-way mechanical cut-off valve, realize the protection gas detection function, and avoid material waste caused by short-time mis-touch.

Description

Technical Field

[0001] This invention relates to the field of arc welding machine accessories technology, specifically a semi-automatic arc welding device for processing compensator materials. Background Technology

[0002] Compensators are core components in pipeline systems used to compensate for thermal deformation and reduce vibration and noise. They are widely used in chemical, HVAC, and power industries. Their processing quality directly determines the operational stability and service life of the pipeline system. In the material forming and processing of compensators, arc welding is the core forming process, mainly used for splicing and fixing the compensator body, connecting flanges, expansion joints, and other structures. Currently, compensator welding processing in the industry is mainly divided into two operation modes: fully automatic arc welding and semi-automatic arc welding. Among them, compensator material processing mostly adopts semi-automatic arc welding equipment, relying on manual control of the welding torch trajectory and mechanical assistance to complete wire feeding and arc stabilization operations. This method combines processing flexibility and cost-effectiveness, and is suitable for welding processing needs of compensator irregular structures and multi-specification workpieces.

[0003] In the gas-shielded semi-automatic arc welding machine system, the welding machine operation panel accessories, parameter adjustment knob protection components, and shielding gas detection and control auxiliary mechanisms are critical arc welding accessories that directly affect the stability of welding process parameters and the consumption of shielding gas consumables. Traditional semi-automatic arc welding devices have exposed arc welding parameter adjustment knobs on the main welding machine panel, lacking specially adapted knob locking protection accessories and dedicated protective locking structures. The complex working conditions in the processing workshop make it easy for parameters to deviate due to workshop vibration, workpiece collisions, and accidental touches by novice operators. This leads to disorder in core arc physical characteristic parameters such as arc voltage, welding current, output inductance, and pulse waveform, resulting in unstable arc combustion, deterioration of droplet transfer morphology, a sharp increase in welding spatter rate, fluctuations in weld penetration and heat input, and uneven weld formation of compensators, resulting in low product yield.

[0004] Meanwhile, the gas detection function module of the existing welding machine also lacks a supporting auxiliary mechanism for preventing accidental gas circuit connection. The gas detection function configured on the welding machine panel is only used for short-term debugging of protective gas flow and troubleshooting of gas circuit faults. It does not need to be turned on for a long time. However, the welding accessories of the existing welding machine lack a forced gas circuit protection structure. During operation, the gas detection button is easily pressed by mistake, and the gas circuit is continuously connected, resulting in long-term release of carbon dioxide protective gas, serious waste of consumables, increased mass production cost of compensators, and significantly increased processing cost of the arc welding process of compensators. Summary of the Invention

[0005] The purpose of this invention is to provide a semi-automatic arc welding device for processing compensator materials, and to improve the welding machine control panel accessories and gas circuit linkage auxiliary mechanism to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a semi-automatic arc welding device for processing compensator materials, comprising a welding machine main unit, a front panel mounted on the welding machine main unit, a plurality of adjusting knobs mounted on the front panel, a potentiometer fixedly mounted inside the front panel, and a two-position two-way mechanical shut-off valve located inside the welding machine main unit. A protective housing is mounted on the front panel, and multiple sets of knob protection assemblies are provided on the protective housing. The two-position two-way mechanical shut-off valve is provided with a valve stem. Each knob protection assembly includes an external knob, a support assembly, and a reset assembly. The external knob is axially slidably mounted on the protective housing. When pressed, the external knob can drive the adjusting knob to adjust the current and arc voltage parameters of the arc welding. When the press is released... The reset assembly pushes the external knob to reset; the two-position two-way mechanical shut-off valve is mounted on the potentiometer via a bracket; the protective housing is equipped with an axially arranged push assembly, which extends through the front panel into the welding machine host; the potentiometer is equipped with a push buffer assembly, which is positioned opposite the valve stem; when the external knob is pressed for a long time, the push assembly and the push buffer assembly can press against the valve stem, opening the two-position two-way mechanical shut-off valve and opening the gas flow path; a buffer stroke is provided between the push buffer assembly and the valve stem; when pressed briefly, the valve stem remains closed due to the buffer stroke; the push assembly is triggered when any external knob is pressed; the two-position two-way mechanical shut-off valve only opens when the external knob is continuously pressed for more than the buffer stroke duration, so that the gas path control is subordinate to the knob operation.

[0007] The front panel surface is symmetrically provided with guide holes. The push assembly includes: a pressure ring, which is disposed between multiple external knobs and the front panel, and multiple telescopic springs are fixedly installed on the pressure ring; a U-shaped top frame, whose two ends pass through two guide holes respectively and are fixedly connected to the pressure ring; and two push springs, which are fixedly connected to the U-shaped top frame.

[0008] One end of the valve stem has a transmission hole. The push-buffer assembly includes: a rectangular cylinder, which is mounted on a bracket via a connecting frame. A second pressure relief pipe and an air inlet pipe are installed on the upper side of the rectangular cylinder. A one-way valve that only allows gas to enter is installed inside the air inlet pipe; a sealing push plate, which is slidably installed inside the rectangular cylinder and fixedly connected to two push springs; a push rod, one end of which is fixedly connected to the sealing push plate, and the other end of which extends out of the rectangular cylinder; and a U-shaped rod, one end of which is fixedly connected to the push rod, and the other end of which is inserted into the transmission hole. The length of the transmission hole is greater than the thickness of the U-shaped rod, and the gap between the push rod and the valve stem is the buffer stroke.

[0009] The support assembly includes: an annular groove located on the outside of the external knob; two support seats, both fixedly mounted on the protective housing, each with a movable groove; two support blocks, one end of each support block vertically slidingly mounted in one of the movable grooves, and the other end inserted into the annular groove; two support springs, both ends of which are fixedly connected to the protective housing and the support blocks; and a locking component mounted on the support seat for locking the support blocks. A rubber ring is adhered to the inside of the external knob, and multiple resistance grooves are formed on the end face of the adjustment knob.

[0010] The support base has an insertion hole on its side that communicates with the moving slot. The locking component includes: a locking block with a trapezoidal longitudinal section, a rectangular hole on the locking block, and one end inserted into the insertion hole; a sliding block, which is horizontally slidably installed in the rectangular hole and is installed on the reset assembly; and a buffer spring, which is horizontally fixedly installed in the rectangular hole and one end is fixedly connected to the sliding block.

[0011] The reset assembly includes: a rectangular box mounted on a support base with a strip-shaped hole on its upper surface; a movable stopper plate horizontally and slidably mounted inside the rectangular box, with a reset spring installed on one side, one end of which is fixedly connected to the inner wall of the rectangular box; a connecting rod, one end of which is fixedly connected to the movable stopper plate, and the other end passing through the strip-shaped hole and fixedly connected to a sliding block; a gas-gathering pipe vertically and fixedly mounted on the rectangular box and communicating with the interior; a sealing plug vertically and slidably mounted inside the gas-gathering pipe; a push rod vertically and fixedly mounted on the sealing plug; a transmission frame, both ends of which are fixedly connected to the support block and the push rod, respectively; and a first pressure relief pipe installed at one end of the rectangular box, with a diameter smaller than that of the gas-gathering pipe.

[0012] A positioning seat is fixedly installed at the bottom of the U-shaped rod, and a locking hole is provided on the positioning seat; an L-shaped fixing frame is fixedly installed at the bottom of the rectangular tube, and a locking rod is vertically slidably installed on the fixing frame. One end of the locking rod abuts against the positioning seat, and spring rods are symmetrically fixedly installed at one end of the locking rod. One end of the two spring rods is fixedly connected to the fixing frame; one end of the locking rod is located on the moving path of the locking hole and can be inserted into the locking hole to lock the valve stem and ensure the flow of gas.

[0013] The locking rod has a rectangular reset hole. A moving rod is horizontally slidably mounted on the bottom of the fixing frame via a mounting base. A push block is fixedly mounted on one end of the moving rod. The push block has a right-angled trapezoidal structure and one end is inserted into the reset hole. A guide tube is fixedly mounted on the front side panel. One end of the guide tube extends out of the protective housing. A cylindrical rod is slidably inserted into the guide tube. One end of the cylindrical rod extends into the welding machine host and is fixedly connected to one end of the moving rod. The other end extends out of the guide tube, making it easy for the operator to press and release the locking rod.

[0014] The cylindrical rod has an annular mounting groove on its surface, which is located at one end near the guide tube and inside the guide tube. An annular fitting is fitted inside the annular mounting groove, and the surface of the annular fitting is sprayed with red fluorescent agent to alert the operator when the two-position two-way mechanical shut-off valve is opened.

[0015] The protective housing is equipped with multiple protective covers, and the support assembly and reset assembly are both located inside the protective covers.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This device is an improvement on the operation and gas circuit control accessories for gas-shielded arc welding machines. A knob protection assembly with a protective shell is added to the front panel of the welding machine. At the same time, a delayed linkage gas circuit structure is provided to realize the gas detection function and prevent accidental touch. When the external knob is not pressed, the rubber ring is separated from the internal adjustment knob and cannot be rotated to adjust welding current, voltage and other parameters. Only by pressing down the external knob, the support block moves and the rubber ring fits against the end face of the adjustment knob, so that the external knob can be rotated to change the arc electrical parameters of the equipment. This can avoid the deviation of arc characteristic parameters caused by workshop vibration, workpiece collision, and accidental touch by personnel. It can reduce the quality defects such as uneven weld depth and excessive spatter caused by arc force fluctuations during compensator welding, and stabilize the finished product penetration rate and welding quality. Moreover, only by maintaining the external knob in a long press can the valve stem be pushed to open the two-position two-way mechanical shut-off valve to realize the protective gas detection function. Short-term accidental touch will not open the gas circuit and avoid the waste of consumables caused by the release of carbon dioxide protective gas.

[0018] 2. During the pressing of the external knob, the support block simultaneously presses down on the sealing plug, forcing the gas in the gas-gathering tube into the rectangular box. This pushes the moving plug plate and connecting rod, causing the locking block to extend into the moving groove of the support seat, temporarily locking the support block and maintaining the external knob in the downward adjustment state. After the adjustment is completed and the external force is released, the first pressure relief pipe slowly releases the gas in the box. The reset spring pulls the moving plug plate and locking block to reset, releasing the locking constraint. The support spring then pushes the external knob back to the initial isolation position. The entire process relies on air pressure buffering to achieve delayed unlocking, preventing operators from forgetting to reset the external knob and preventing the potential for misadjustment caused by the external knob being in contact with the adjustment knob for a long time.

[0019] 3. The equipment is equipped with a delayed linkage air circuit connection structure. A short press of the external knob only completes parameter adjustment. When the external knob is pressed continuously, the pressure ring drives the U-shaped top frame to compress the push spring. The sealing push plate slides along the rectangular cylinder, and the gas in the cylinder is slowly discharged through the second pressure relief pipe. The buffer stroke forms a delayed action. There is a stroke margin between the U-shaped rod and the valve stem transmission hole. The delay time matches the rebound cycle of the external knob. In conjunction with the opening of the two-position two-way mechanical shut-off valve, a synchronous trigger locking structure is formed. The locking rod is locked into the locking hole of the positioning seat to keep the valve stem in the open state. At the same time, the reset hole pushes the push block and the cylindrical rod to extend outward, and the ring-shaped kit with red fluorescent coating is exposed, which intuitively indicates to the operator that the air circuit is currently in the conducting state. This makes it easy for the operator to pay attention to the air test time in time and avoid the waste of protective gas caused by forgetting to close the air circuit for a long time.

[0020] 4. After the gas test is completed, press the extended cylindrical rod to push the push block to open the locking rod, release the valve rod lock, and the push spring will drive the sealing push plate, push rod and valve rod to automatically reset, quickly cutting off the gas passage. Even if the knob is accidentally touched later, it will not open the gas passage again unless it is pressed continuously, effectively reducing the consumption of carbon dioxide consumables and reducing the production cost of mass production of compensators. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the entire invention.

[0022] Figure 2 This is a frontal perspective three-dimensional structural diagram of the front panel, protective housing, and knob protection assembly of the present invention.

[0023] Figure 3 This is a frontal three-dimensional exploded view of the front panel, protective housing, and knob protection assembly of the present invention.

[0024] Figure 4 This is a three-dimensional partial cross-sectional structural diagram of the front panel, protective housing, and knob protection assembly of the present invention.

[0025] Figure 5 This is a three-dimensional structural diagram of the front panel, potentiometer, and two-position two-way mechanical shut-off valve of the present invention.

[0026] Figure 6 This is a three-dimensional partial cross-sectional structural diagram of the support component, reset component, and external knob of the present invention.

[0027] Figure 7 This is a cross-sectional view of the external knob of the present invention.

[0028] Figure 8 This is a three-dimensional partial cross-sectional structural diagram of the support component and the reset component of the present invention.

[0029] Figure 9This is a schematic diagram of a three-dimensional partial cross-sectional structure of the locking block, sliding block, and movable stopper plate of the present invention.

[0030] Figure 10 This is a three-dimensional partial cross-sectional structural diagram of the front panel, potentiometer, and two-position two-way mechanical shut-off valve of the present invention.

[0031] Figure 11 This is a three-dimensional structural diagram of the two-position two-way mechanical shut-off valve, the push assembly, and the push buffer assembly of the present invention.

[0032] Figure 12 This is a three-dimensional partial cross-sectional structural diagram of the two-position two-way mechanical shut-off valve and the push-buffer assembly of the present invention.

[0033] Figure 13 This is a three-dimensional structural schematic diagram of the two-position two-way mechanical shut-off valve of the present invention.

[0034] Figure 14 This is a three-dimensional structural diagram of the U-shaped rod, positioning seat, locking rod, pushing block, and moving rod of the present invention.

[0035] Figure 15 for Figure 14 A magnified view of part A in the image.

[0036] Figure 16 This is a partial three-dimensional cross-sectional schematic diagram of the cylindrical rod and guide tube of the present invention.

[0037] In the diagram: 1. Welding machine main unit; 2. Adjustment knob; 3. Potentiometer; 4. Two-position two-way mechanical shut-off valve; 5. Front panel; 6. Protective housing; 7. External knob; 8. Valve stem; 9. Annular groove; 10. Support base; 11. Support block; 12. Support spring; 13. Rubber ring; 14. Resistance groove; 15. Locking block; 16. Sliding block; 17. Buffer spring; 18. Rectangular box; 19. Moving plug plate; 20. Connecting rod; 21. Gas gathering pipe; 22. Sealing plug; 23. Push rod; 24. Transmission frame; 25. First pressure relief pipe; 26. 27. Pressure ring; 28. U-shaped top bracket; 29. ​​Push spring; 30. Rectangular cylinder; 31. Second pressure relief pipe; 32. Air inlet pipe; 33. Sealing push plate; 34. Push rod; 35. Transmission hole; 36. U-shaped rod; 37. Positioning seat; 38. Locking hole; 39. Fixing bracket; 40. Spring rod; 41. Reset hole; 42. Mounting seat; 43. Moving rod; 44. Push block; 45. Guide tube; 46. Cylindrical rod; 47. Annular assembly; 48. Protective cover; 49. Bracket; 50. Reset spring; 51. Telescopic spring. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0039] Please see Figures 1 to 16 This invention provides a technical solution: a semi-automatic arc welding device for processing compensator materials. This device addresses the problem of accidental activation of the adjustment knob 7 and the gas detection button by providing a new approach. The specific implementation is as follows:

[0040] Example 1:

[0041] The semi-automatic arc welding device includes a welding machine main unit 1, a front panel 5 mounted on the welding machine main unit 1, several adjustment knobs 2 mounted on the front panel 5, a potentiometer 3 fixedly mounted inside the front panel 5, and a two-position two-way mechanical shut-off valve 4 located inside the welding machine main unit 1. The welding machine main unit 1 is a conventional arc welding machine carrier. This invention improves upon it by mounting welding machine auxiliary mechanisms on the welding machine main unit 1. (See reference...) Figure 1 and Figure 2 As shown, rotating the adjustment knob 2 changes the resistance of the potentiometer 3, thereby adjusting core welding parameters such as welding current, arc voltage, and inductance. A protective housing 6 is installed on the front panel 5. A knob protection assembly is provided on the outside of each adjustment knob 2 to isolate workshop dust and spatter, while also preventing direct impact from external objects onto the external knob 7. (See reference...) Figure 5 As shown, the two-position two-way mechanical shut-off valve 4 is fixed next to the potentiometer 3 by the bracket 49. The valve body has a valve stem 8. The inlet end is connected to the external gas input interface of the welding machine host 1, and the outlet end is connected in series to the inlet pipeline of the welding machine's original solenoid valve. Only when the two-position two-way mechanical shut-off valve 4 and the solenoid valve are both turned on will the welding machine output carbon dioxide protective gas. If only one valve body is opened, gas cannot be supplied, thus forming a dual gas path control.

[0042] See Figure 6 As shown, the knob protection assembly includes an external knob 7, a support assembly, and a reset assembly. The external knob 7 is axially slidably mounted on the protective housing 6. When pressed, the external knob 7 drives the adjustment knob 2 to adjust the welding parameters. When the pressure is released, the reset assembly pushes the external knob 7 to reset. A rubber ring 13 is bonded to the inner side of the external knob 7. (See reference...) Figure 4As shown, the end face of the adjustment knob 2 is provided with multiple resistance grooves 14. When no downward pressure is applied, the support assembly will push the external knob 7 upward. The rubber ring 13 bonded to the inner side of the external knob 7 remains separated from the end face of the adjustment knob 2. At this time, even if the hand touches and rotates the external knob 7, the rubber ring 13 cannot engage with the resistance grooves 14 on the end face of the adjustment knob 2, and cannot drive the adjustment knob 2 to rotate. This avoids parameter deviation problems caused by workshop vibration, workpiece collision, and accidental touch by personnel, and reduces quality defects such as uneven weld depth and excessive spatter during the welding of the compensator.

[0043] See Figure 10 As shown, the two-position two-way mechanical shut-off valve 4 is mounted on the potentiometer 3 via a bracket 49. An axially arranged push assembly is located inside the protective housing 6. The push assembly extends through the front panel 5 into the welding machine host 1. A push buffer assembly is located on the potentiometer 3 and is positioned opposite the valve stem 8. When the external knob 7 is pressed for a long time, the push assembly and the push buffer assembly can press against the valve stem 8, opening the two-position two-way mechanical shut-off valve 4 and opening the gas flow path. A buffer stroke is provided between the push buffer assembly and the valve stem 8 to delay the valve stem 8's action, so that the valve stem 8 remains closed when the external knob 7 is pressed briefly. The push assembly is triggered when either external knob 7 is pressed. The two-position two-way mechanical shut-off valve 4 only opens when the external knob 7 is continuously pressed for more than the buffer stroke duration, ensuring that the two-position two-way mechanical shut-off valve 4 and the original electromagnetic valve of the welding machine are simultaneously in a conductive state, allowing carbon dioxide shielding gas to be delivered to the welding torch. This dual-valve-body series arrangement reduces the probability of mis-connection of the gas path.

[0044] See Figure 8 As shown, the support assembly includes: annular groove 9, two support seats 10, two support blocks 11, two support springs 12, and a locking component.

[0045] The annular groove 9 is located on the outside of the external knob 7. Both support seats 10 are fixedly installed on the protective housing 6. Each of the two support seats 10 has a movable groove. One end of each of the two support blocks 11 is vertically slidably installed in the two movable grooves, and the other end is inserted into the annular groove 9. The two ends of the support spring 12 are fixedly connected to the protective housing 6 and the support block 11, respectively. Under normal conditions, the support spring 12 pushes the support block 11 upward, causing the external knob 7 to remain in an upward and isolated state. The locking component is installed on the support seat 10 to lock the support block 11. When the external knob 7 is pressed, the support block 11 will move in the movable groove of the support seat 10, and the support spring 12 will be compressed.

[0046] The support base 10 has a socket on its side that communicates with the moving slot. The locking components include a locking block 15 with a trapezoidal longitudinal section, a sliding block 16, and a buffer spring 17. The locking block 15 has a rectangular hole, and one end of it is inserted into the socket. (See reference...) Figure 9As shown, the sliding block 16 is horizontally slidably installed in the rectangular hole and is mounted on the reset assembly. The buffer spring 17 is horizontally fixedly installed in the rectangular hole, and one end is fixedly connected to the sliding block 16. The locking block 15 can slide on the sliding block 16. The inclined surface of the locking block 15 faces the support block 11. During the process of the support block 11 moving vertically downward, the support block 11 and the inclined surface of the locking block 15 abut against each other, causing the locking block 15 and the sliding block 16 to move relative to each other to avoid the support block 11, until the support block 11 moves below the locking block 15, thus locking the support block 11.

[0047] The reset assembly includes: a rectangular box 18, a movable plug plate 19, a connecting rod 20, a gas gathering pipe 21, a sealing plug 22, a push rod 23, a transmission frame 24, and a first pressure relief pipe 25.

[0048] A rectangular box 18 is mounted on a support base 10, with a strip-shaped hole on its upper surface. A movable plug plate 19 is horizontally and slidably mounted inside the rectangular box 18, and a return spring 50 is mounted on one side. One end of the return spring 50 is fixedly connected to the inner wall of the rectangular box 18. One end of the connecting rod 20 is fixedly connected to the movable plug plate 19, and the other end passes through the strip-shaped hole and is fixedly connected to the sliding block 16. A gas-gathering pipe 21 is vertically and fixedly mounted on the rectangular box 18 and communicates with the interior. A sealing plug 22 is vertically and slidably mounted inside the gas-gathering pipe 21. A push rod 23 is vertically and fixedly mounted on the sealing plug 22. Both ends of the transmission frame 24 are fixedly connected to the support block 11 and the push rod 23, respectively. A first pressure relief pipe 25 is installed at one end of the rectangular box 18. The pipe diameter is smaller than that of the gas-gathering pipe 21, which can slowly release the gas inside the box to achieve a delayed unlocking effect.

[0049] Multiple protective covers 48 are installed on the protective housing 6. The support components and reset components are all housed inside the protective covers 48. This not only blocks the spatter and dust generated during welding in the workshop, but also prevents the workpiece and tools from directly impacting the external knob 7 and causing damage to the components.

[0050] When the operator needs to adjust the welding parameters, press down the external knob 7. As the external knob 7 moves downward, the annular groove 9 simultaneously presses down the two support blocks 11. The support blocks 11 slide downward along the moving groove of the support base 10. When the support blocks 11 move downward, they simultaneously press down the push rod 23 and the sealing plug 22 through the transmission frame 24. The sealing plug 22 squeezes the gas remaining in the gas gathering tube 21 into the inner cavity of the rectangular box 18. After the gas pressure inside the rectangular box 18 increases, it pushes the moving plug plate 19 to slide away from the return spring 50. The moving plug plate 19 drives the sliding block 16 through the connecting rod 20. The locking block 15 extends into the moving groove inside the support base 10, while the support block 11 abuts against the lower surface of the locking block 15 and moves directly below the locking block 15, temporarily locking the support block 11 and keeping the external knob 7 in a continuously pressed state. At this time, the rubber ring 13 on the inner side of the external knob 7 fits against the end face of the adjustment knob 2, and the rubber ring 13 is embedded in the resistance groove 14 to form friction. The operator can rotate the external knob 7, which simultaneously drives the adjustment knob 2 to rotate, change the resistance value of the potentiometer 3, and complete the adjustment of welding parameters such as current, voltage, and inductance to adapt to the welding requirements of compensators of different specifications.

[0051] After the parameters are adjusted, the operator releases the pressure on the external knob 7. The high-pressure gas inside the rectangular box 18 is slowly discharged outward through the first pressure relief pipe 25 with a small diameter. The gas pressure inside the box gradually decreases. The reset spring 50 pulls the moving stopper plate 19 to slide in the opposite direction. The moving stopper plate 19 drives the sliding block 16 and the locking block 15 to return to the insertion hole of the support base 10 through the connecting rod 20, releasing the locking constraint on the support block 11. The two support springs 12 push the support block 11 upward, and the support block 11 resets upward along the moving groove. At the same time, it drives the external knob 7 to spring back upward. The rubber ring 13 and the end face of the adjustment knob 2 separate again, completing a complete parameter adjustment process. Relying on the slow pressure relief characteristic of the first pressure relief pipe 25, it will not unlock immediately after the external force is released, forming a buffer delay. This avoids the external knob 7 from immediately springing back after the operator releases the pressure in the middle, reducing the interruption of parameter adjustment. At the same time, it prevents the external knob 7 from being in contact with the adjustment knob 2 for a long time, which may cause misadjustment.

[0052] Example 2:

[0053] This embodiment, based on Embodiment 1, adds a push-pull assembly and a push-pull buffer assembly to distinguish between short-term parameter adjustment and long-term gas detection functions, avoiding waste of consumables caused by long-term venting of carbon dioxide protective gas. Two sets of guide holes are symmetrically opened on the five sides of the front panel, and the push-pull assembly is installed inside the guide holes. (See reference...) Figure 11As shown, the push assembly includes a pressure ring 26, a U-shaped top bracket 27, and two push springs 28. The pressure ring 26 is arranged between multiple sets of external knobs 7 and the front panel 5. Multiple telescopic springs 51 are fixedly installed on the pressure ring 26. The two ends of the U-shaped top bracket 27 pass through two sets of guide holes respectively, and the two ends are fixedly connected to the pressure ring 26. One end of the two push springs 28 is fixed to the bottom of the U-shaped top bracket 27, and the other end is arranged facing the inside of the welding machine host 1.

[0054] See Figure 12 and Figure 13 As shown, one end of the valve stem 8 is provided with a transmission hole 34, and the push buffer assembly includes: a rectangular tube 29, a sealing push plate 32, a push rod 33 and a U-shaped rod 35.

[0055] The rectangular tube 29 is mounted on the bracket 49 via a connecting frame. A second pressure relief pipe 30 and an air inlet pipe 31 are installed on the upper side of the rectangular tube 29. A one-way valve that only allows gas to enter is installed inside the air inlet pipe 31. A sealing push plate 32 is slidably installed inside the rectangular tube 29 and is fixedly connected to two push springs 28. One end of the push rod 33 is fixedly connected to the sealing push plate 32, and the other end extends out of the rectangular tube 29. One end of the U-shaped rod 35 is fixedly connected to the push rod 33, and the other end is inserted into the transmission hole 34. The length of the transmission hole 34 is greater than the thickness of the U-shaped rod 35. The diameter of the air inlet pipe 31 is greater than the diameter of the second pressure relief pipe 30. At the same time, in the initial state, there is a gap between the U-shaped rod 35 and the valve stem 8.

[0056] Pressing any one of the external knobs 7 will press the pressure ring 26, pushing the U-shaped top bracket 27 to move inwards towards the main unit. The U-shaped top bracket 27 will push the sealing push plate 32 inside the rectangular cylinder 29 via the push spring 28. Initially, the push spring 28 will undergo compression deformation, generating pressure on the sealing push plate 32. Under pressure, the gas inside the rectangular cylinder 29 will slowly be discharged from the second pressure relief pipe 30. The sealing push plate 32 will slowly move inwards towards the rectangular cylinder 29, and push the valve stem 8 via the push rod 33 and the U-shaped rod 35. The thickness of one end of the U-shaped rod 35 is less than the length of the transmission hole 34. Under short-term pressing, the external knob 7 will be reset by the action of the reset component. At this time, the stroke of the push rod 33 driving the U-shaped rod 35 is insufficient to touch the valve stem 8 and drive the valve stem 8 to move. Only under long-term pressing, the push rod 33 has enough time to drive the U-shaped rod 35 to move and touch one end of the valve stem 8, driving the valve stem 8 to move and opening the two-position two-way mechanical shut-off valve 4. Short-term accidental contact will not conduct the protective gas circuit, greatly reducing the waste of carbon dioxide gas.

[0057] See Figure 14As shown, a positioning seat 36 is fixedly installed at the bottom of the U-shaped rod 35, and a locking hole 37 is provided on the positioning seat 36. An L-shaped fixing bracket 38 is fixedly installed at the bottom of the rectangular tube 29, and a locking rod 39 is vertically slidably installed on the fixing bracket 38. One end of the locking rod 39 abuts against the positioning seat 36, and a spring rod 40 is symmetrically fixedly installed at one end of the locking rod 39. One end of the two spring rods 40 is fixedly connected to the fixing bracket 38. One end of the locking rod 39 is located on the moving path of the locking hole 37 and can be inserted into the locking hole 37 to lock the valve stem 8 and ensure the gas passage is unobstructed. Under the elastic force of the spring rod 40, one end of the locking rod 39 is always abutting against the bottom of the positioning seat 36. During the process of the U-shaped rod 35 pushing the valve stem 8 to move, the positioning seat 36 and the locking rod 39 move relative to each other. When the two-position two-way mechanical shut-off valve 4 is just opened, one end of the locking rod 39 is just inserted into the locking hole 37 to maintain the continuous conduction of the gas passage. The operator can complete the gas passage leak detection and flow rate adjustment operations.

[0058] See Figure 15 As shown, a rectangular reset hole 41 is provided on the locking rod 39. A moving rod 43 is horizontally slidably mounted on the bottom of the fixing bracket 38 via the mounting base 42. A push block 44 is fixedly mounted on one end of the moving rod 43. The push block 44 has a right-angled trapezoidal structure and one end is inserted into the reset hole 41. A guide tube 45 is fixedly mounted on the front panel 5. One end of the guide tube 45 extends out of the protective housing 6. A cylindrical rod 46 is slidably inserted into the guide tube 45. One end of the cylindrical rod 46 extends into the welding machine host 1 and is fixedly connected to one end of the moving rod 43. The other end extends out of the guide tube 45, making it easy for the operator to press and release the lock of the locking rod 39. The movable rod 43 can move horizontally at the bottom of the fixed frame 38. One end of the inclined surface of the push block 44 is inserted into the reset hole 41 opened in the locking rod 39. After the air test and debugging are completed, the operator manually presses the exposed cylindrical rod 46. The cylindrical rod 46 pushes the movable rod 43 and the push block 44 to move laterally. When the push block 44 is pushed into the reset hole 41, it can drive the locking rod 39 away from the locking hole 37, release the lock on the U-shaped rod 35. After the external knob 7 is reset, the telescopic spring 51 drives the pressure ring 26 to reset at the same time. The push spring 28 is in a stretched state and drives the push rod 33, U-shaped rod 35 and valve rod 8 to reset.

[0059] See Figure 16As shown, the cylindrical rod 46 has an annular mounting groove on its surface. The annular mounting groove is located at one end near the guide tube 45 and inside the guide tube 45. An annular kit 47 is fitted inside the annular mounting groove. The surface of the annular kit 47 is coated with red fluorescent agent. When the two-position two-way mechanical shut-off valve 4 is opened, the cylindrical rod 46 will extend outward synchronously with the moving rod 43. The annular kit 47 with red fluorescent agent will be exposed from inside the guide tube 45. Even in low-light conditions in the workshop, the operator can intuitively identify that the gas circuit is open and stop the gas test in time to avoid the consumption of consumables caused by prolonged gas venting.

[0060] During welding, when the operator needs to modify the welding process parameters, they press down on the external knob 7. The external knob 7 slides downward along the axial direction of the protective housing 6, and the annular groove 9 presses down on the support block 11. The support block 11 slides down along the moving groove of the support seat 10 and compresses the support spring 12. During the downward movement of the support block 11, it drives the transmission frame 24 to simultaneously press down on the sealing plug 22 inside the gas gathering pipe 21. The gas inside the gas gathering pipe 21 is squeezed into the rectangular box 18 below, and the gas pressure inside the rectangular box 18 increases, pushing the horizontal... The sealed movable plug plate 19 slides to the side. The movable plug plate 19 drives the sliding block 16 to move synchronously through the connecting rod 20 in the strip hole. The sliding block 16 drives the trapezoidal locking block 15 to extend into the moving groove of the support base 10 and lock the support block 11. At this time, the rubber ring 13 on the inner side of the external knob 7 is attached to the end face of the adjustment knob 2. The rubber ring 13 is inserted into the resistance groove 14 to form a friction transmission structure. At this time, rotating the external knob 7 can synchronously drive the adjustment knob 2 to rotate, change the signal of the potentiometer 3, and complete the adjustment of welding parameters.

[0061] A smaller-diameter first pressure relief pipe 25 is installed at one end of the rectangular box 18. After releasing the external pressure on the external knob 7, the gas inside the rectangular box 18 can only be slowly discharged through the first pressure relief pipe 25. The reset spring 50 slowly pulls the moving plug plate 19 to reset, and the locking block 15 returns to the insertion hole after a delay, releasing the lock of the support block 11. This creates a short-term holding effect of adjusting the stroke and a delayed rebound, preventing the external knob 7 from immediately popping open and interrupting the parameter adjustment when the hand is released. At the same time, the entire process relies on air pressure buffering to achieve delayed unlocking, avoiding the operator forgetting to reset the external knob 7 and preventing the potential for misadjustment caused by the external knob 7 being in contact with the adjustment knob 2 for a long time.

[0062] When operators need to perform gas checks, troubleshoot gas flow, or check for pipe blockages, they should press and hold the external knob 7 continuously. The external knob 7 will continuously press down, pushing the pressure ring 26 and the U-shaped top bracket 27 inward. The push spring 28 will continue to compress, and the sealing push plate 32 will continue to slide inward within the rectangular cylinder 29. The gas in the rectangular cylinder 29 can only be slowly discharged through the smaller diameter second pressure relief pipe 30, forming a buffer delay. After the sealing push plate 32 has completed its buffer stroke, the push rod 33 and the U-shaped rod 35 will push forward simultaneously. The U-shaped rod 35 will touch one end of the valve stem 8, causing the valve stem 8 to move horizontally and open the two-position two-way mechanical shut-off valve 4. At this time, the two-position two-way mechanical shut-off valve 4 and the original electromagnetic valve of the welding machine will be connected simultaneously, ensuring the complete connection of the gas circuit, and gas check operations can be carried out.

[0063] As the U-shaped rod 35 moves forward, the bottom positioning seat 36 moves forward simultaneously. The locking rod 39 springs upward under the elastic force of the spring rod 40, and its end is inserted into the locking hole 37 of the positioning seat 36, locking the U-shaped rod 35 and the valve stem 8 in the open position. Even if the operator releases the external knob 7 and the external knob 7 resets, the rebound force of the push spring 28 cannot directly pull the sealing push plate 32 to reset, and the air passage can remain open.

[0064] When the locking rod 39 is inserted into the locking hole 37, it pushes the push block 44. The push block 44 drives the moving rod 43 and the cylindrical rod 46 to extend outward along the guide tube 45. After the cylindrical rod 46 moves outward, the annular kit 47 with a red fluorescent coating inside the guide tube 45 is exposed to the visible area. The operator can intuitively judge whether the current gas circuit is in the conducting state through the red fluorescent kit, which makes it easier to control the gas detection time and reduce the situation of long-term venting of protective gas.

[0065] After the gas inspection is completed, the operator directly presses the end of the cylindrical rod 46 extending from the outside of the guide tube 45. The cylindrical rod 46 pushes the moving rod 43 and the push block 44 inward. The push block 44 presses the inner wall of the reset hole 41 by the right-angled trapezoidal inclined surface, causing the locking rod 39 to slide downward. The top of the locking rod 39 disengages from the locking hole 37 of the positioning seat 36, releasing the locking constraint on the U-shaped rod 35 and the valve stem 8. The two push springs 28 rebound and pull the sealing push plate 32 to reset. External gas enters the rectangular cylinder 29 through the air inlet pipe 31. The push rod 33 and the U-shaped rod 35 reset synchronously. One end of the U-shaped rod 35 contacts the inner wall of the transmission hole 34 and pulls the valve stem 8 to reset and close the two-position two-way mechanical shut-off valve 4. The gas circuit is immediately disconnected, and the carbon dioxide gas output stops.

[0066] During the batch welding of compensators, even if the workpiece in the subsequent workshop accidentally touches the external knob 7, as long as the press-and-hold action is not maintained for a sufficient duration, the push-and-buffer assembly will not complete the buffer stroke, and the two-position two-way mechanical shut-off valve 4 will not open. This can stably control the consumption of protective gas consumables and reduce the processing cost of a single compensator.

[0067] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A semi-automatic arc welding device for processing compensator materials, comprising a welding machine main unit, a front panel disposed on the welding machine main unit, a plurality of adjusting knobs disposed on the front panel, a potentiometer fixedly disposed on the inner side of the front panel, and a two-position two-way mechanical shut-off valve disposed inside the welding machine main unit, characterized in that: A protective housing is installed on the front side panel, and multiple sets of knob protection assemblies are provided on the protective housing. A valve stem is provided on the two-position two-way mechanical shut-off valve. The knob protection assembly includes an external knob, a support assembly, and a reset assembly. The external knob is axially slidably mounted on the protective housing. When pressed, the external knob can drive the adjustment knob to adjust the current and arc voltage parameters of the arc welding. When the press is released, the reset assembly pushes the external knob to reset. The two-position two-way mechanical shut-off valve is mounted on the potentiometer via a bracket. The protective housing is provided with an axially arranged push assembly, which extends through the front panel into the welding machine host. The potentiometer is equipped with a push-buffer assembly, which is positioned opposite to the valve stem. When the external knob is pressed down for a long time, the push-buffer assembly and the push-buffer assembly can press against the valve stem, opening the two-position two-way mechanical shut-off valve and opening the gas flow channel. There is a buffer stroke between the push-buffer assembly and the valve stem. When pressed briefly, the valve stem remains closed due to the buffer stroke. The push assembly is triggered when any external knob is pressed, and the two-position two-way mechanical shut-off valve opens only when the external knob is continuously pressed for more than the buffer stroke duration, so that the air circuit control is subordinate to the knob operation.

2. The semi-automatic arc welding device according to claim 1, characterized in that: The front panel surface is symmetrically provided with guide holes, and the push assembly includes: A pressure ring is disposed between multiple external knobs and the front panel, and multiple telescopic springs are fixedly installed on the pressure ring. The U-shaped top frame has two guide holes at each end and is fixedly connected to the pressure ring; Two push springs are fixedly connected to the U-shaped top frame.

3. The semi-automatic arc welding device according to claim 2, characterized in that: One end of the valve stem has a transmission hole, and the push-buffer assembly includes: A rectangular tube is mounted on a support via a connecting frame. A second pressure relief pipe and an air inlet pipe are installed on the upper side of the rectangular tube. A one-way valve that only allows gas to enter is installed inside the air inlet pipe. A sealing push plate is slidably installed inside a rectangular tube and is fixedly connected to two push springs. A push rod, one end of which is fixedly connected to a sealing push plate, and the other end of which extends out of a rectangular tube; A U-shaped rod, one end of which is fixedly connected to a top rod, and the other end is inserted into a transmission hole. The length of the transmission hole is greater than the thickness of the U-shaped rod, and the gap between the top rod and the valve stem is a buffer stroke.

4. The semi-automatic arc welding device according to claim 3, characterized in that, The support components include: An annular groove is formed on the outside of the external knob; Two support bases are provided, both of which are fixedly installed on the protective housing, and each of the two support bases is provided with a movable groove; Two support blocks, one end of each support block is vertically slidably installed in two movable slots, and the other end is inserted into an annular slot; Two support springs, with their two ends fixedly connected to the protective shell and the support block, respectively; A locking component, which is mounted on a support base, is used to lock the support block; A rubber ring is bonded to the inside of the external knob, and multiple resistance grooves are formed on the end face of the adjustment knob.

5. The semi-automatic arc welding device according to claim 4, characterized in that: The support base has a socket hole on its side that communicates with the movable slot, and the locking component includes: A locking block with a trapezoidal longitudinal section has a rectangular hole and one end is inserted into the hole. A sliding block is horizontally slidably installed in a rectangular hole and mounted on a reset assembly; A buffer spring is horizontally fixedly installed inside a rectangular hole, and one end is fixedly connected to a sliding block.

6. The semi-automatic arc welding device according to claim 5, characterized in that: The reset component includes: A rectangular box, which is mounted on a support base and has a strip hole on its upper surface; A movable stopper plate is horizontally and slidably installed inside a rectangular box, and a return spring is installed on one side, with one end of the return spring fixedly connected to the inner wall of the rectangular box. A connecting rod, one end of which is fixedly connected to a movable stop plate, and the other end of which passes through a strip hole and is fixedly connected to a sliding block; A gas-gathering pipe is vertically fixed on a rectangular box and communicates with the interior. A sealing plug, which slides vertically and seals within the gas-gathering tube; A push rod, which is vertically fixedly mounted on the sealing plug; A transmission frame, the two ends of which are fixedly connected to a support block and a push rod, respectively; The first pressure relief pipe is installed at one end of the rectangular box, and its diameter is smaller than that of the gas gathering pipe.

7. The semi-automatic arc welding device according to claim 6, characterized in that: A positioning seat is fixedly installed at the bottom of the U-shaped rod, and a locking hole is provided on the positioning seat; An L-shaped fixing frame is fixedly installed at the bottom of the rectangular tube. A locking rod is vertically slidably installed on the fixing frame. One end of the locking rod abuts against the positioning seat. Spring rods are symmetrically fixedly installed at one end of the locking rod. One end of the two spring rods is fixedly connected to the fixing frame. One end of the locking rod is located on the moving path of the locking hole and can be inserted into the locking hole to lock the valve stem and ensure the flow of gas.

8. The semi-automatic arc welding device according to claim 7, characterized in that: The locking rod has a rectangular reset hole. The bottom of the fixing frame is horizontally slidably mounted with a moving rod via a mounting base. One end of the moving rod is fixedly mounted with a push block. The push block has a right-angled trapezoidal structure and one end is inserted into the reset hole. A guide tube is fixedly installed on the front side panel. One end of the guide tube extends out of the protective shell. A cylindrical rod is slidably inserted into the guide tube. One end of the cylindrical rod extends into the welding machine host and is fixedly connected to one end of the moving rod. The other end extends out of the guide tube, making it easy for the operator to press and release the locking rod.

9. The semi-automatic arc welding device according to claim 8, characterized in that: The cylindrical rod has an annular mounting groove on its surface. The annular mounting groove is located at one end near the guide tube and inside the guide tube. An annular assembly is fitted inside the annular mounting groove. The surface of the annular assembly is coated with a red fluorescent agent to alert the operator when the two-position two-way mechanical shut-off valve is opened.

10. The semi-automatic arc welding device according to claim 9, characterized in that: The protective housing is equipped with multiple protective covers, and the support assembly and reset assembly are both located inside the protective covers.

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