Electric arc welding device for sound insulation room machining

Abstract

The invention relates to the technical field of electric arc welding, in particular to an electric arc welding device for sound insulation room machining, which comprises an insulation sleeve, a protection nozzle, a conductive nozzle and an anti-blocking mechanism, the insulation sleeve is connected to a gun barrel, the protection nozzle and the conductive nozzle are connected to the insulation sleeve, the conductive nozzle is located in the protection nozzle, and the anti-blocking mechanism is located in the protection nozzle. The insulation sleeve is provided with an air hole communicated with a wire guide hole of the insulation sleeve, the anti-blocking mechanism comprises an expansion part, a liner tube and an expansion force providing assembly, the expansion force providing assembly is installed on the liner tube, and the expansion force providing assembly moves linearly in the protection nozzle along with the liner tube and is compressed to exhaust air. The expansion piece extends into the wire guide hole of the insulation sleeve through the air hole, and the whole blockage cleaning process does not need to dismount the protective nozzle, does not need to dismount the conductive nozzle, does not need to intervene by an external third-party cleaning piece, and is convenient to operate.

Description

Technical Field

[0001] The present invention relates to the technical field of arc welding, in particular to an arc welding device used for processing in a soundproof room. Background Art

[0002] A soundproof room (or silent room) is a soundproof testing device designed for product manufacturing workshops requiring testing. It is a facility specifically designed to reduce noise interference and is widely used in recording studios and film and television post-production rooms. Sound absorption treatment is applied to the soundproof room, turning it into a small, silent chamber, allowing testing of small products such as precision instruments, motors, speakers, and transformers. The structural design of the soundproof room is its core component, aiming to minimize the length and area of ​​the sound wave propagation path and minimize reflection and diffraction of sound waves within the room.

[0003] The main structure of the soundproof room is constructed with square steel as the frame, while the exterior panels are constructed with environmentally friendly, high-quality fiberglass panels, and interlayer welded sound insulation panels. Arc welding effectively blocks the high-frequency arc noise (typically reaching 100-120 decibels) generated during welding, protecting both workers and the surrounding environment. Gas-shielded arc welding, also known as gas-shielded welding or gas-electric welding, is a type of arc welding that uses an arc as the heat source and a gas as the shielding medium for fusion welding. During welding, the shielding gas forms a protective layer around the arc, isolating the arc and molten pool from the air, preventing harmful gases and ensuring stable arc combustion.

[0004] Traditional gas arc welding consists of an insulating sleeve, a shielding nozzle, and a conductive tip. The insulating sleeve has air holes. As the welding wire is fed through the conductive tip, carbon dioxide gas is discharged through the air holes to block the airflow and maintain weld quality. However, during welding, spatter reflected into the shielding nozzle can clog the air holes, affecting the simultaneous discharge of carbon dioxide gas, rendering the air blockage ineffective and compromising weld quality. When used for welding soundproof workpieces, the generation of large bubbles can compromise the soundproofing effect. Because the insulating sleeve is located within the shielding nozzle and the air holes are located behind the conductive tip, clogged air holes are difficult to clean. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides the following technical solutions: An arc welding device for processing in a soundproof room comprises an insulating sleeve, a protective mouth, a conductive tip and an anti-clogging mechanism, wherein the insulating sleeve is connected to a gun barrel, the protective mouth and the conductive tip are connected to the insulating sleeve, the conductive tip is located inside the protective mouth, the insulating sleeve is provided with an air hole communicating with its guide wire hole, the anti-clogging mechanism comprises an expansion piece, a liner and an expansion force providing assembly, the expansion force providing assembly is mounted on the liner, the expansion force providing assembly follows the liner in a linear motion in the protective mouth and compresses and exhausts air, the expansion piece extends from the air hole into the guide wire hole of the insulating sleeve, the expansion force providing assembly is connected to the expansion piece, and the expansion force providing assembly provides axial tension to the expansion piece through linear motion, and also provides radial expansion force to the expansion piece through compressed exhaust.

[0006] As a further preferred embodiment, a pushing portion is provided at one end of the liner extending into the protective mouth, the insulating sleeve extends into the liner and leaves an exhaust channel between the insulating sleeve and the cavity wall of the liner, the air hole passes through the exhaust channel, and the insulating sleeve is provided with a step portion facing the pushing portion. The anti-blocking mechanism also includes a compression tube installed on the pushing portion, one end of the compression tube extends horizontally toward the step portion, and the other end of the compression tube is connected to the expansion piece, which is a curved tube communicated with the tube cavity of the compression tube, and the end of the expansion piece extending into the air hole is closed.

[0007] As a further preferred embodiment, a guide track groove is provided on the insulating sleeve, one end of the guide track groove reaches the end of the insulating sleeve and is provided with a downwardly inclined connecting portion, the other end of the guide track groove extends horizontally to the air hole and is connected to the air hole, and the groove width of the guide track groove is greater than the width of the expansion piece.

[0008] As a further preference, the expansion member is a flat tube with an elliptical cross-section, and a plurality of protrusions are provided on the tube wall.

[0009] As a further preference, the anti-blocking mechanism further includes a return spring filled between the pushing portion and the stepped portion, and under the elastic support of the return spring, one end of the liner is extended out of the protective mouth.

[0010] As a further preferred embodiment, a limiting portion is provided on the outer circular surface of the liner, a movable portion is provided on the inner circular surface of the protective mouth, the limiting portion is located inside the movable portion, a locking sleeve is provided on the inner circular surface of the protective mouth, and the limiting portion is relatively arranged on the inner side of the locking sleeve.

[0011] As a further preferred embodiment, a supporting portion is provided on the free end of the compression tube, and a shaping spring is sleeved on the outer periphery of the compression tube. The two ends of the shaping spring elastically abut between the supporting portion and the pushing portion, and the inner wall of the shaping spring is close to the tube wall of the compression tube.

[0012] As a further preferred embodiment, a movable gap is left between the outer circular surface of the liner and the inner circular surface of the protective mouth, and the movable gap is connected to the air gas at the outer end of the protective mouth through the gap between the limiting part and the locking sleeve. A through hole is opened on the pushing part, and a sealing ring is embedded in the through hole. The sealing ring is slidably fitted on the outer circular surface of one end of the insulating sleeve extending into the liner.

[0013] The beneficial effects of the present invention compared to the prior art are: If pores are found in the weld, the outer end of the liner is pressed against the workpiece to apply pressure, forcing the outer end of the liner to retreat into the protective nozzle. At this time, the inner end of the liner pushes the expansion force to provide component pressure and exhaust. The gas enters the expansion part and causes the expansion part to expand radially in the pore. At the same time, when the expansion force provides component compression, it will also drag the expansion part along the axial direction of the pore, so that the blockage in the pore is unblocked and scattered. In the above unblocking process, since the expansion part will expand radially, it is equivalent to the pore being filled by the expansion part first, thereby improving the tightness between it and the blockage. As the expansion part moves axially along the pore, the blockage is effectively broken. When the blockage is not unblocked, the outer end of the liner extends outside the protective nozzle, and the expansion force provides component recovery length. At the same time, the expansion effect and tension on the expansion part are also released. At this time, the expansion part deflates and the pore returns to a state of unobstructed exhaust. At the same time, the expansion part retreats into the pore without hindering the normal exhaust of the pore. The blockage is eliminated and the carbon dioxide gas is discharged normally. During the entire process of clearing the blockage, there is no need to remove the mouth guard, the conductive nozzle, or the intervention of external third-party cleaning parts, making the operation easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of an arc welding device with a gun rod for use in a soundproof room provided by an embodiment of the present invention; Figure 2 An arc welding device for processing in a soundproof room provided by an embodiment of the present invention is composed of Figure 1 The schematic diagram of each component after cutting open only the welding area is shown; Figure 3 An arc welding device for processing in a soundproof room provided by an embodiment of the present invention is composed of Figure 2 The schematic diagram of the disassembled protective mouth is shown; Figure 4 An arc welding device for processing in a soundproof room provided by an embodiment of the present invention is composed of Figure 2The schematic diagram from the back perspective is introduced; Figure 5 An arc welding device for processing in a soundproof room provided by an embodiment of the present invention is composed of Figure 4 A schematic diagram of each part after being disassembled from another perspective; Figure 6 An arc welding device for processing in a soundproof room provided by an embodiment of the present invention is composed of Figure 5 The schematic diagram of the cutaway is drawn out; Figure 7 An arc welding device for processing in a soundproof room provided by an embodiment of the present invention is composed of Figure 3 The enlarged schematic diagram of part A is shown.

[0015] In the figure: 10, insulating sleeve; 20, protective nozzle; 30, conductive nozzle; 40, anti-clogging mechanism; 410, expansion member; 420, liner; 430, expansion force providing assembly; 440, compression tube; 450, return spring; 101, air hole; 102, exhaust channel; 103, step portion; 104, guide rail groove; 105, connecting portion; 210, movable part; 220, locking sleeve; 4201, pushing portion; 4202, limiting portion; 4203, movable gap; 4204, sealing ring; 4401. Abutting portion; 4402. A shaping spring. DETAILED DESCRIPTION

[0016] The above and other embodiments and advantages of the present invention are clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments.

[0017] In one embodiment, Figure 1-Figure 7 As shown: This embodiment provides an arc welding device for processing in a soundproof room, comprising an insulating sleeve 10, a protective mouth 20, a conductive tip 30 and an anti-clogging mechanism 40. The insulating sleeve 10 is connected to the gun barrel, the protective mouth 20 and the conductive tip 30 are connected to the insulating sleeve 10, the conductive tip 30 is located in the protective mouth 20, and the insulating sleeve 10 is provided with an air hole 101 communicating with its guide wire hole. The anti-clogging mechanism 40 comprises an expansion piece 410, a liner 420 and an expansion force providing component 430. The expansion force providing component 430 is installed on the liner 420. The expansion force providing component 430 follows the liner 420 in a linear motion in the protective mouth 20 and compresses and exhausts the air. The expansion piece 410 extends into the guide wire hole of the insulating sleeve 10 from the air hole 101. The expansion force providing component 430 is connected to the expansion piece 410. The expansion force providing component 430 provides axial tension to the expansion piece 410 through linear motion, and also provides radial expansion force to the expansion piece 410 through compressed exhaust.

[0018] The welding wire enters the conductive tip 30 through the through hole of the insulating sleeve 10 and is sent to the workpiece through the outer end of the conductive tip 30. The carbon dioxide gas enters the air hole 101 through the through hole of the insulating sleeve 10, is discharged into the liner 420 in the radial direction from the air hole 101, and is discharged to the workpiece through the outer end of the liner 420 to block the air and prevent bubbles from being generated in the weld and affecting the noise reduction effect of the workpiece (the existing technology of gas arc welding will not be repeated).

[0019] This embodiment can clean the blockage in the pore 101, and it is not necessary to remove the protective nozzle 20 and the conductive nozzle 30 during cleaning, which is convenient for operation. It is manifested as follows: if pores are found in the weld, the outer end of the liner 420 is pressed against the workpiece to apply pressure, forcing the outer end of the liner 420 to retreat into the protective nozzle 20. At this time, the inner end of the liner 420 pushes the expansion force providing component 430 to pressurize the exhaust gas, and the gas enters the expansion member 410 to cause the expansion member 410 to expand radially in the pore 101. At the same time, when the expansion force providing component 430 is compressed, it will also drag the expansion member 410 along the axial direction of the pore 101, so that the blockage in the pore 101 is cleared and scattered. In the above-mentioned clearing process, since the expansion member 410 will expand radially, it is equivalent to the pore 101 being cleared by the expansion member 410. 10 is filled first, thereby improving the tightness between it and the obstruction. As the expansion member 410 moves axially along the air hole 101, the obstruction is effectively broken. When it is not cleared, the outer end of the liner 420 extends outside the protective nozzle 20. The expansion force provides the component 430 to restore its length. At the same time, the expansion effect and tension on the expansion member 410 are released. The expansion member 410 deflates and the air hole 101 returns to a state of unobstructed exhaust. At this time, the expansion member 410 retreats into the air hole 101 again and does not hinder the normal exhaust of the air hole 101. The obstruction is eliminated and the carbon dioxide gas is discharged normally. The entire cleaning process of the obstruction does not require the removal of the protective nozzle 20, the conductive nozzle 30, or the intervention of an external third-party cleaning member. When cleaning, it is only necessary to press the outer end of the liner 420 against the workpiece once, which is easy to operate.

[0020] like Figure 2 、 Figure 3 as well as Figure 7 As shown, a push portion 4201 is provided at one end of the liner tube 420 extending into the protective nozzle 20 , the insulating sleeve 10 extends into the liner tube 420 and an exhaust channel 102 is left between the insulating sleeve 10 and the cavity wall of the liner tube 420 , and the air hole 101 passes through the exhaust channel 102 .

[0021] As previously mentioned, after carbon dioxide is exhausted from air holes 101, it is discharged through exhaust passage 102 to the outside of liner tube 420, thereby blocking air. Compared to the prior art, the present invention, even with liner tube 420 installed within shield nozzle 20, does not affect the normal discharge of carbon dioxide gas. Furthermore, if the outer end of liner tube 420 collides with the workpiece during welding, the expansion and contraction characteristics of liner tube 420 provide a buffer, minimizing damage.

[0022] like Figure 2 、 Figure 3 as well as Figure 7As shown, the insulating sleeve 10 is provided with a stepped portion 103 facing the pushing portion 4201, and the expansion force providing component 430 includes a compression tube 440 installed on the pushing portion 4201, and the compression tube 440 is provided with a spray hole. One end of the compression tube 440 extends horizontally toward the stepped portion 103, and the other end of the compression tube 440 is connected to the expansion member 410. The expansion member 410 is an elastic curved tube, and one end thereof connected to the compression tube 440 is communicated with the tube cavity of the compression tube 440, and the end of the expansion member 410 extending into the air hole 101 is closed.

[0023] Continuing from the above, the structure of the expansion force providing component 430 is disclosed. When the liner 420 is forced back into the protective mouth 20 due to the force on the outer end, the common inner end is used to push the pushing part 4201, and the pushing part 4201 pushes the compression tube 440. The compression tube 440 is compressed and exhausted at this time, allowing the gas to enter the expansion member 410, and the expansion member 410 is changed from deflated (or flat) to radially expanded. At the same time, the expansion member 410 is dragged to move axially along the air hole 101, but the expansion member 410 always uses its elasticity to bend in the air hole 101. It is just that the end of the expansion member 410 located in the air hole 101 moves a certain distance along the axial direction of the air hole 101 to clear the blockage. As the external force acting on the liner tube 420 disappears, the liner tube 420 will re-extend along the tube cavity of the protective mouth 20, the compression force of the pushing part 4201 at the inner end of the liner tube 420 on the compression tube 440 disappears, the compression tube 440 returns to its original state (stretched and lengthened), the gas in the expansion piece 410 retreats into the compression tube 440, and is discharged outward from the nozzle on the compression tube 440, and the expansion piece 410 returns to its deflated (or flat) state.

[0024] Expansion element 410 is a flat tube with an elliptical cross-section and several protrusions on its wall. When compression tube 440 is compressed and exhausted (when liner tube 420 is pushed inward), expansion element 410 expands radially within pore 101. Furthermore, the protrusions on the tube wall fill pore 101, thereby increasing the contact area and adhesion with obstructions. As expansion element 410 moves axially along pore 101, the protrusions completely clear the obstruction. When compression tube 440 is uncompressed (when liner tube 420 is repositioned outward), expansion element 410 deflates and collapses radially along pore 101. The protrusions follow expansion element 410 toward the wall of pore 101, leaving a gap in pore 101 for proper carbon dioxide discharge.

[0025] like Figure 2 、 Figure 3 as well as Figure 7As shown, the expansion force providing assembly 430 further includes a return spring 450 filled between the push portion 4201 and the stepped portion 103. Under the elastic support of the return spring 450, one end of the liner 420 is extended outside the protective nozzle 20. Considering that the liner 420 is retracted into the protective nozzle 20, the expansion member 410 can automatically pop out and reset after clearing the blockage in the air hole 101 by driving the expansion force providing assembly 430. Therefore, the return spring 450 is provided between the push portion 4201 of the liner 420 and the stepped portion 103 of the insulating sleeve 10. That is, when the liner 420 is retracted into the protective nozzle 20 due to the external end force, the push portion 4201 at the inner end squeezes the return spring 450, causing the return spring 450 to be compressed and shortened. When the external end force on the liner 420 disappears, the return spring 450 is released, allowing the liner 420 to extend again.

[0026] like Figure 2 、 Figure 3 As shown, a guide track groove 104 is provided on the insulating sleeve 10, one end of the guide track groove 104 reaches the end of the insulating sleeve 10 and is provided with a downwardly inclined connecting portion 105, the other end of the guide track groove 104 extends horizontally to the air hole 101, and is communicated with the air hole 101, the groove width of the guide track groove 104 is greater than the width of the expansion piece 410, a limit portion 4202 is provided on the outer circular surface of the liner 420, a movable portion 210 is provided on the inner circular surface of the protective mouth 20, the limit portion 4202 is located in the movable portion 210, a locking sleeve 220 is provided on the inner circular surface of the protective mouth 20, and the limit portion 4202 is relatively arranged on the inner side of the locking sleeve 220. A supporting portion 4401 is provided on the free end of the compression tube 440 , and a shaping spring 4402 is sheathed on the periphery of the compression tube 440 . Both ends of the shaping spring 4402 elastically abut between the supporting portion 4401 and the pushing portion 4201 , and the inner wall of the shaping spring 4402 is close to the tube wall of the compression tube 440 .

[0027] During assembly, first put the protective mouth 20 on the liner 420, and put the limiting part 4202 into the movable part 210 in advance. Then, connect one end of the insulating sleeve 10 to the gun barrel through a thread. Then take the liner 420, align the expansion piece 410 at the inner end of the liner 420 with the guide part 105, and then push the liner 420. The liner 420 pushes the pushing part 4201, and the pushing part 4201 drives the compression tube 440. The compression tube 440 drives the expansion piece 410 and the shaping spring 4402 to move inward until the supporting part 4401 on the free end of the compression tube 440 hits the stepped part 103. At the same time, the free end of the expansion piece 410 enters the guide track groove 104 along the guide part 105 and is plastically deformed until the free end of the expansion piece 410 reaches the air hole 101. It is inserted into the air hole 101 and restored to its original state by utilizing its elastic bending structural characteristics. Then, the fixed end of the protective nozzle 20 is connected to the insulating sleeve 10 by threading, and finally the locking sleeve 220 is fixed (threaded or tightly fitted) to the inner surface of the protective nozzle 20 to form a restrictive relationship with the limit part 4202, and under the elastic support of the reset spring 450 on the pushing part 4201, the liner 420 with the limit part 4202 is moved toward the locking sleeve 220, and the locking sleeve 220 is used to restrict the liner 420 to prevent the liner 420 from falling off, and at the same time, the outer end of the liner 420 is pressed against the locking sleeve 220. Figure 1 The embodiment shown extends beyond the protective mouthpiece 20 .

[0028] like Figure 2 、 Figure 7 As shown, considering that the compression tube 440 is in communication with the external gas during compression and exhaust, a movable gap 4203 is left between the outer circular surface of the liner 420 and the inner circular surface of the protective mouth 20, and the movable gap 4203 is in communication with the air gas at the outer end of the protective mouth 20 through the gap between the limiting portion 4202 and the locking sleeve 220. Considering the internal sealing effect and smooth guiding movement, a through hole is also opened on the pushing portion 4201, and a sealing ring 4204 is embedded in the through hole. The sealing ring 4204 is slidably fitted on the outer circular surface of one end of the insulating sleeve 10 extending into the liner 420.

[0029] The above orientation designations do not represent the specific orientations of the components in this implementation scheme. This implementation scheme is only for the convenience of describing the scheme, and the orientations are described relatively with reference to the figures. In essence, the specific orientations of the components are described based on their actual installation and actual use, as well as the customary orientations of those skilled in the art. This is hereby explained.

[0030] The specific embodiments described above further illustrate the purpose of the present invention, technical solutions, and beneficial effects. It should be understood that the above description is merely a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. In particular, it should be noted that for those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An arc welding device for processing in a soundproof room, characterized in that: The invention comprises an insulating sleeve (10), a protective mouthpiece (20), a conductive nozzle (30) and an anti-blocking mechanism (40), wherein the insulating sleeve (10) is connected to the gun barrel, the protective mouthpiece (20) and the conductive nozzle (30) are connected to the insulating sleeve (10), the conductive nozzle (30) is located in the protective mouthpiece (20), the insulating sleeve (10) is provided with an air hole (101) communicating with the guide wire hole thereof, the anti-blocking mechanism (40) comprises an expansion member (410), a liner (420) and an expansion force providing component (430), the expansion force providing component (430) 0) is installed on the liner (420), the expansion force providing component (430) follows the liner (420) to move linearly in the protective mouth (20) and compress and exhaust, the expansion piece (410) extends from the air hole (101) into the guide wire hole of the insulating sleeve (10), the expansion force providing component (430) is connected to the expansion piece (410), and the expansion force providing component (430) provides axial tension to the expansion piece (410) through linear movement, and also provides radial expansion force to the expansion piece (410) through compressed exhaust.

2. The arc welding device for processing in a soundproof room according to claim 1, characterized in that: The end of the liner (420) extending into the protective mouth (20) is provided with a pushing portion (4201), the insulating sleeve (10) extends into the liner (420) and leaves an exhaust channel (102) between the liner (420) and the cavity wall of the liner (420), the air hole (101) passes through the exhaust channel (102), the insulating sleeve (10) is provided with a stepped portion (103) facing the pushing portion (4201), the anti-blocking mechanism (40) also includes a compression tube (440) installed on the pushing portion (4201), one end of the compression tube (440) extends horizontally toward the stepped portion (103), the other end of the compression tube (440) is connected to the expansion member (410), the expansion member (410) is a curved tube communicating with the tube cavity of the compression tube (440), and the end of the expansion member (410) extending into the air hole (101) is closed.

3. The arc welding device for processing in a soundproof room according to claim 2, characterized in that: A guide track groove (104) is provided on the insulating sleeve (10), one end of the guide track groove (104) reaches the end of the insulating sleeve (10) and is provided with a downwardly inclined connecting portion (105), the other end of the guide track groove (104) horizontally extends to the air hole (101) and communicates with the air hole (101), and the groove width of the guide track groove (104) is greater than the width of the expansion member (410).

4. The arc welding device for processing in a soundproof room according to claim 3, characterized in that: The expansion member (410) is a flat tube with an elliptical cross-section, and a plurality of protrusions are provided on the tube wall.

5. The arc welding device for processing in a soundproof room according to claim 4, characterized in that: The anti-clogging mechanism (40) further includes a return spring (450) filled between the pushing portion (4201) and the stepped portion (103), and under the elastic support of the return spring (450), one end of the liner (420) extends outside the protective mouth (20).

6. The arc welding device for processing in a soundproof room according to claim 5, characterized in that: A limiting portion (4202) is provided on the outer circumferential surface of the liner (420), a movable portion (210) is provided on the inner circumferential surface of the protective mouth (20), and the limiting portion (4202) is located inside the movable portion (210). A locking sleeve (220) is provided on the inner circumferential surface of the protective mouth (20), and the limiting portion (4202) is relatively arranged on the inner side of the locking sleeve (220).

7. The arc welding device for processing in a soundproof room according to claim 6, characterized in that: A supporting portion (4401) is provided on the free end of the compression tube (440), and a shaping spring (4402) is sheathed around the periphery of the compression tube (440). Both ends of the shaping spring (4402) elastically abut between the supporting portion (4401) and the pushing portion (4201), and the inner wall of the shaping spring (4402) is close to the tube wall of the compression tube (440).

8. The arc welding device for processing in a soundproof room according to claim 7, characterized in that: A movable gap (4203) is left between the outer circular surface of the liner (420) and the inner circular surface of the protective mouth (20), and the movable gap (4203) is in communication with the air at the outer end of the protective mouth (20) through the gap between the limiting portion (4202) and the locking sleeve (220). A through hole is provided on the pushing portion (4201), and a sealing ring (4204) is embedded in the through hole. The sealing ring (4204) is slidably fitted on the outer circular surface of one end of the insulating sleeve (10) extending into the liner (420).

Images