A high-temperature resistant device for welding

Abstract

The present invention discloses a high-temperature resistant device for welding, which relates to the technical field of high-temperature welding, and includes a base frame and a through pipe. A gas storage tank is fixedly installed on the top of the base frame, and the gas storage tank includes a main tank body, a pressure gauge, a safety protection device, an air inlet and an air outlet. For this high-temperature resistant device for welding, a connection assembly is provided. The left flange and the right flange are fixedly connected by fastening bolts to achieve the preliminary connection and fixation of the pressure gauge and the first polytetrafluoroethylene hard pipe. Then, an air pump is used to extract the air inside the hollow convex connecting piece and the hollow concave connecting piece to make the inside vacuum. By utilizing the air pressure difference existing inside and outside the hollow convex connecting piece and the hollow concave connecting piece, the two are tightly fitted to seal the connection gap between the left flange and the right flange. The improved air pipe is not only convenient for the quick connection of the air pipe and the air supply mechanism, but also there is no problem of poor airtightness at the connection position, so that when the protective gas passes through the connection position, it is not easy to have a leakage problem.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature welding, and specifically provides a high-temperature resistant device for welding. Background Art

[0002] Welding, also known as fusion welding, is a manufacturing process and technology for joining metals or other thermoplastic materials such as plastics by heating, high temperature or high pressure. There are many sources of energy for modern welding, including gas flames, electric arcs, lasers, electron beams, friction, and ultrasonic waves. In addition to being used in factories, welding can also be carried out in various environments, such as in the wild, underwater, and in space. Wherever it is carried out, welding may pose risks to operators, so appropriate protective measures must be taken during welding.

[0003] When a welding torch welds a structural member, it is often necessary to use a shielding gas to isolate the welding position from the air to ensure the welding quality. A nozzle is provided on the welding torch, and the nozzle is connected to a gas cylinder containing the shielding gas through a pipeline. An electromagnetic valve is provided on the pipeline to control the connection or disconnection of the pipeline. The pressure of the shielding gas in the gas cylinder is greater than the atmospheric pressure. After the electromagnetic valve is opened, the shielding gas in the gas cylinder flows through the pipeline to the nozzle and sprays out from the nozzle. The welding process can be divided into three stages: the arc starting stage, the main welding stage, and the backfire stage. The state of the shielding gas directly affects the state of the welding arc. The state of the shielding gas includes the flow rate, pressure, composition, etc. of the shielding gas; among them, the gas flow rate is set according to the welding method, welding process specifications, welding materials, etc. to ensure that there are no pores in the welding and the stability of the welding process. The pipeline for passing the shielding gas is usually called an air pipe. As a relatively important component, it must have the characteristic of high temperature resistance to adapt to the high-temperature environment of welding. However, the current high-temperature resistant devices (air pipes) still have the following deficiencies:

[0004] First of all, when the existing air pipe is docked with the gas supply mechanism, screws are usually used to fix the end of the air pipe to the gas supply structure, but this connection method will have the problem of poor airtightness at the connection position, resulting in air leakage when the shielding gas passes through the connection position;

[0005] Secondly, the existing air pipes are generally divided into two types: flexible pipes and rigid pipes. Flexible pipes are convenient for the operation of the welding torch, but the connection positions are prone to loosening problems. Rigid pipes are convenient for installation and the interface positions are stable, but the interface positions are prone to being pulled and broken or damaged due to the welding operation of the welding torch.

[0006] Therefore, it is urgent to improve this shortcoming. The present invention studies and improves the existing structure and deficiencies, and provides a high-temperature resistant device for welding. Summary of the Invention

[0007] The purpose of the present invention is to provide a high-temperature resistant device for welding to solve the problems raised in the above background art.

[0008] To achieve the above object, the present invention provides the following technical solution: A high-temperature resistant device for welding, comprising a base frame and a through pipe. A gas storage tank is fixedly installed on the top of the base frame, and the gas storage tank includes a main tank body, a pressure gauge, a safety protection device, an air inlet and an air outlet. A pressure gauge is provided on the outer surface of the main tank body, and a safety protection device is fixedly installed on the top of the main tank body. An air inlet is provided on the left side of the main tank body, and an air outlet is provided on the right side of the main tank body. The air outlet is connected to a solenoid valve. One end of the through pipe is connected to the solenoid valve, and the other end of the through pipe is connected to a pressure gauge. The bottom of the gas storage tank is connected to a pressure balance assembly, and one end of the pressure balance assembly is connected to the top of the through pipe in a through manner. A connection assembly is fixedly connected to the right side of the pressure gauge, and the pressure gauge is connected to a tracheal assembly through the connection assembly. One end of the tracheal assembly is fixedly connected to a welding torch.

[0009] Further, the pressure balance assembly includes a first connecting pipe, a pressure balancer, a second connecting pipe and a pressure balance pipe. One end of the first connecting pipe is connected to the pressure balancer, and a second connecting pipe is fixedly connected to the top of the pressure balancer. The top end of the second connecting pipe is fixedly connected to the pressure balance pipe. At the same time, one end of the pressure balance pipe is connected to the outer wall of the through pipe in a through manner.

[0010] Further, the connection assembly includes a left flange and a hollow convex connecting piece. The left flange is welded to the right side of the pressure gauge, and a hollow convex connecting piece is installed inside the left flange. The inner surface of the left flange is fixedly connected and fitted with the outer surface of the hollow convex connecting piece.

[0011] Further, the connection assembly further includes an exhaust pipe, an exhaust pump and a ventilation hole. One side of the hollow convex connecting piece is fixedly connected to the exhaust pipe, and the end of the exhaust pipe is fixedly connected to the exhaust pump. The other side of the hollow convex connecting piece is provided with a ventilation hole.

[0012] Further, the connection assembly further includes a right flange, a hollow concave connecting piece and a fastening bolt. The right flange is welded to the end of the tracheal assembly, and the inner surface of the right flange is fixedly connected and fitted with the outer surface of the hollow concave connecting piece. The outer wall of the right flange is connected with a fastening bolt through a thread. At the same time, the right flange is fixedly connected to the left flange through the fastening bolt.

[0013] Further, the hollow convex connecting piece and the hollow concave connecting piece form a clamping structure, and the shape and size of the hollow convex connecting piece are both matched with the shape and size of the hollow concave connecting piece.

[0014] Further, the tracheal component includes a polytetrafluoroethylene hose, a first polytetrafluoroethylene hard tube, a second polytetrafluoroethylene hard tube, a sealing and docking component, and a clamping groove. Both ends of the polytetrafluoroethylene hose are connected with the sealing and docking component. One end of the polytetrafluoroethylene hose is fixedly connected with the first polytetrafluoroethylene hard tube through the sealing and docking component. The other end of the polytetrafluoroethylene hose is fixedly connected with the second polytetrafluoroethylene hard tube through the sealing and docking component. Meanwhile, a clamping groove is formed on the outer wall of the second polytetrafluoroethylene hard tube.

[0015] Further, the sealing and docking component includes a left connecting ring, a right connecting ring, a housing, a connecting block, and a connecting bolt. The left connecting ring is welded to the end of the polytetrafluoroethylene hose. The right connecting ring is connected to the side of the left connecting ring away from the polytetrafluoroethylene hose. The right connecting ring is welded to the end of the second polytetrafluoroethylene hard tube. The housing covers the outside of the left connecting ring and the right connecting ring. A connecting block is fixedly connected to the outer wall of the housing. One side of the connecting block is threadedly connected with the connecting bolt.

[0016] Further, the sealing and docking component includes a snap ring and a rubber sleeve. The snap ring is fixedly connected to the inside of the housing. The rubber sleeve is fixedly connected to the outer surface of the snap ring. The rubber sleeve is located between the snap ring and the clamping groove.

[0017] Further, the usage method of the high-temperature resistant welding equipment includes the following steps:

[0018] A. Fix the left flange and the right flange through the fastening bolts to achieve the preliminary connection and fixation of the pressure gauge and the first polytetrafluoroethylene hard tube. Then, use the air extraction pump to extract the air inside the hollow convex connecting part and the hollow concave connecting part to make it vacuum inside. Utilize the air pressure difference between the inside and outside of the hollow convex connecting part and the hollow concave connecting part to achieve their tight fit and seal the connection gap between the left flange and the right flange, thus completing the connection between the tracheal component and the pressure gauge.

[0019] B. Start the solenoid valve so that the protective gas in the gas storage tank can pass through the pipeline to the nozzle on the welding torch and be ejected through the nozzle. The operator holds the welding torch to start the welding operation. The nozzle continuously ejects the protective gas during the welding process. Since the gas pipe assembly is composed of a polytetrafluoroethylene hose, a first polytetrafluoroethylene hard pipe, and a second polytetrafluoroethylene hard pipe spliced together, the design of the polytetrafluoroethylene hose facilitates the flexible use of the welding torch, while the first polytetrafluoroethylene hard pipe and the second polytetrafluoroethylene hard pipe facilitate the connection of the gas pipe assembly to the gas supply mechanism and the welding torch. Moreover, sealing docking components are provided at the connection positions of the soft and hard pipes. The left connecting ring and the right connecting ring are limited inside the housing by the connecting bolts to perform the first-stage sealing of the connection position. Through the engagement design of the snap ring and the engaging groove, the connection gap between the connecting block and the outer walls of the polytetrafluoroethylene hose and the second polytetrafluoroethylene hard pipe is reduced. And the rubber sleeve provided on the outer surface of the snap ring can further fill the connection gap between the snap ring and the engaging groove to perform the second-stage sealing of the connection position. The double sealing improves the overall airtightness of the gas pipe assembly;

[0020] C. During the welding process, since the pressure balancer is connected to the gas storage tank through the first connecting pipe and is connected to the through pipe through the second connecting pipe and the pressure balance pipe, when the pressure balancer detects an abnormal pressure, it can timely perform the pressure balance operation through the pressure balance pipe. When the pressure balancer detects that the air pressure in the gas storage tank is greater than the air pressure in the through pipe, it will increase the pressure in the through pipe through gas supply. When it detects that the air pressure in the gas storage tank is lower than the air pressure in the through pipe, it will reduce the pressure in the through pipe through gas extraction.

[0021] The present invention provides a high-temperature resistant device for welding, which has the following beneficial effects:

[0022] 1. The present invention is provided with a connection component. The left flange and the right flange are fixedly connected by fastening bolts to initially connect and fix the pressure gauge to the first polytetrafluoroethylene hard pipe. Then, the air inside the hollow convex connecting piece and the hollow concave connecting piece is extracted by the air extraction pump to make the inside vacuum. By using the air pressure difference inside and outside the hollow convex connecting piece and the hollow concave connecting piece, the two are closely fitted to seal the connection gap between the left flange and the right flange. The improved high-temperature resistant device (gas pipe) is not only convenient for the quick connection of the gas pipe to the gas supply mechanism, but also there is no problem of poor airtightness at the connection position. When the protective gas passes through the connection position, it is not easy to leak, which is beneficial to maintaining the air pressure of the protective gas and making the ejection pressure more uniform and controllable.

[0023] 2. The present invention is provided with a trachea assembly, which is composed of a polytetrafluoroethylene hose, a first polytetrafluoroethylene hard tube, and a second polytetrafluoroethylene hard tube spliced together. And at the connection positions between the polytetrafluoroethylene hose and the first polytetrafluoroethylene hard tube, and between the first polytetrafluoroethylene hard tube and the second polytetrafluoroethylene hard tube, there are sealing and docking assemblies. By restricting the left connecting ring and the right connecting ring inside the housing, a first-level seal is performed on the connection positions. And through the engagement design of the snap ring and the engaging groove, the connection gaps between the connecting block and the outer walls of the polytetrafluoroethylene hose and the second polytetrafluoroethylene hard tube are reduced. Moreover, the rubber sleeve provided on the outer surface of the snap ring can further fill the connection gap between the snap ring and the engaging groove, performing a second-level seal on the connection positions. The improved high-temperature resistant device (trachea) overcomes the respective defects of the soft and hard tubes through the splicing design of the soft and hard tubes, not only facilitating the flexible use of the welding torch, but also avoiding loosening at the interface position or breakage and collapse caused by the pulling of the welding torch during welding operations through the sealing design at the interface position.

[0024] 3. The present invention is provided with a pressure balance assembly. The pressure balancer is connected to the gas storage tank through the first connecting pipe, and is connected to the through pipe through the second connecting pipe and the pressure balance pipe. When the pressure balancer detects abnormal pressure, it increases or decreases the pressure through gas supply or gas extraction, and realizes the pressure balance between the gas storage tank and the through pipe through the pressure balance pipe. The improved high-temperature resistant device (trachea) has the function of balancing pressure, can self-adjust when the pressure is abnormal, which is beneficial to improving the use stability of the gas storage tank, and thus is beneficial to ensuring the stable supply of the protective gas and improving the welding effect of the welding torch. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the front view structural schematic diagram of a high-temperature resistant device for welding according to the present invention;

[0026] Figure 2 is the structural connection schematic diagram of the left flange - right flange of a high-temperature resistant device for welding according to the present invention;

[0027] Figure 3 is the front sectional view structural schematic diagram of the left flange - right flange of a high-temperature resistant device for welding according to the present invention;

[0028] Figure 4 is the structural disassembly schematic diagram of the left flange - right flange of a high-temperature resistant device for welding according to the present invention;

[0029] Figure 5 is the structural connection schematic diagram of the left connecting ring - right connecting ring of a high-temperature resistant device for welding according to the present invention;

[0030] Figure 6Schematic diagram of the structural disassembly of the sealing and docking component of a high-temperature resistant device for welding in the present invention. In the figure: 1. Base frame; 2. Gas storage tank; 201. Main tank body; 202. Pressure gauge; 203. Safety protection device; 204. Air inlet; 205. Air outlet; 3. Solenoid valve; 4. Connecting pipe; 5. Pressure gauge; 6. Pressure balance component; 601. First connecting pipe; 602. Pressure balancer; 603. Second connecting pipe; 604. Pressure balance pipe; 7. Connecting component; 701. Left flange; 702. Hollow convex connecting piece; 703. Exhaust pipe; 704. Exhaust pump; 705. Vent hole; 706. Right flange; 707. Hollow concave connecting piece; 708. Fastening bolt; 8. Air pipe component; 801. Polytetrafluoroethylene hose; 802. First polytetrafluoroethylene hard pipe; 803. Second polytetrafluoroethylene hard pipe; 804. Sealing and docking component; 8041. Left connecting ring; 8042. Right connecting ring; 8043. Housing; 8044. Connecting block; 8045. Connecting bolt; 8046. Snap ring; 8047. Rubber sleeve; 805. Engaging groove; 9. Welding torch. Detailed implementation manners

[0031] The following further describes in detail the implementation manners of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0032] As Figure 1 shown, a high-temperature resistant device for welding includes a base frame 1 and a connecting pipe 4. A gas storage tank 2 is fixedly installed on the top of the base frame 1, and the gas storage tank 2 includes a main tank body 201, a pressure gauge 202, a safety protection device 203, an air inlet 204 and an air outlet 205. A pressure gauge 202 is arranged on the outer surface of the main tank body 201, and a safety protection device 203 is fixedly installed on the top of the main tank body 201. An air inlet 204 is arranged on the left side of the main tank body 201, and an air outlet 205 is arranged on the right side of the main tank body 201. The air outlet 205 is connected to a solenoid valve 3. One end of the connecting pipe 4 is connected to the solenoid valve 3, and the other end of the connecting pipe 4 is connected to a pressure gauge 5. The bottom of the gas storage tank 2 is connected to a pressure balance component 6, and one end of the pressure balance component 6 is connected to the top of the connecting pipe 4 in a penetrating manner. The pressure balance component 6 includes a first connecting pipe 601, a pressure balancer 602, a second connecting pipe 603 and a pressure balance pipe 604. One end of the first connecting pipe 601 is connected to the pressure balancer 602, and a second connecting pipe 603 is fixedly connected to the top of the pressure balancer 602. The top end of the second connecting pipe 603 is fixedly connected to the pressure balance pipe 604. At the same time, one end of the pressure balance pipe 604 is connected to the outer wall of the connecting pipe 4 in a penetrating manner. By setting the pressure balancer 602 and the pressure balance pipe 604, the pressure can be balanced when there is a problem with the pressure.

[0033] As Figures 1-6As shown in the figure, a connection component 7 is fixedly connected to the right side of the barometer 5. The connection component 7 includes a left flange 701 and a hollow convex connecting piece 702. The left flange 701 is welded to the right side of the barometer 5. A hollow convex connecting piece 702 is installed inside the left flange 701. The inner surface of the left flange 701 is fixedly connected and fitted with the outer surface of the hollow convex connecting piece 702. The connection component 7 further includes an air extraction pipe 703, an air extraction pump 704, and a ventilation hole 705. One side of the hollow convex connecting piece 702 is fixedly connected to the air extraction pipe 703. The end of the air extraction pipe 703 is fixedly connected to the air extraction pump 704. The other side of the hollow convex connecting piece 702 is provided with a ventilation hole 705. The connection component 7 further includes a right flange 706, a hollow concave connecting piece 707, and a fastening bolt 708. The right flange 706 is welded to the end of the air pipe component 8. The inner surface of the right flange 706 is fixedly connected and fitted with the outer surface of the hollow concave connecting piece 707. By setting the air extraction pump 704, the air inside the hollow convex connecting piece 702 and the hollow concave connecting piece 707 is extracted to make it vacuum inside. Thus, by using the air pressure difference inside and outside the hollow convex connecting piece 702 and the hollow concave connecting piece 707, their tight fitting is realized. Moreover, the outer wall of the right flange 706 is threadedly connected with a fastening bolt 708. At the same time, the right flange 706 is fixedly connected to the left flange 701 through the fastening bolt 708. By setting the fastening bolt 708, the connection relationship between the left flange 701 and the right flange 706 is locked. The hollow convex connecting piece 702 and the hollow concave connecting piece 707 form a clamping structure, and the shape and size of the hollow convex connecting piece 702 match those of the hollow concave connecting piece 707. The clamping design enables the hollow convex connecting piece 702 and the hollow concave connecting piece 707 to be tightly fitted together after the air inside is extracted. The barometer 5 is connected to an air pipe component 8 through the connection component 7. The air pipe component 8 includes a polytetrafluoroethylene hose 801, a first polytetrafluoroethylene hard pipe 802, a second polytetrafluoroethylene hard pipe 803, a sealing and docking component 804, and a clamping groove 805. Both ends of the polytetrafluoroethylene hose 801 are connected to the sealing and docking component 804. One end of the polytetrafluoroethylene hose 801 is fixedly connected to the first polytetrafluoroethylene hard pipe 802 through the sealing and docking component 804. The other end of the polytetrafluoroethylene hose 801 is fixedly connected to the second polytetrafluoroethylene hard pipe 803 through the sealing and docking component 804. At the same time, a clamping groove 805 is provided on the outer wall of the second polytetrafluoroethylene hard pipe 803. Through the splicing design of the soft and hard pipes, the defects of the soft and hard pipes are overcome. The sealing and docking component 804 includes a left connecting ring 8041, a right connecting ring 8042, a housing 8043, a connecting block 8044, and a connecting bolt 8045. The left connecting ring 8041 is welded to the end of the polytetrafluoroethylene hose 801. The right connecting ring 8042 is connected to the side of the left connecting ring 8041 away from the polytetrafluoroethylene hose 801. The right connecting ring 8042 is welded to the end of the second polytetrafluoroethylene hard pipe 803.The outer parts of the left connecting ring 8041 and the right connecting ring 8042 are covered with a housing 8043. A connecting block 8044 is fixedly connected to the outer wall of the housing 8043. One side of the connecting block 8044 is threadedly connected with a connecting bolt 8045. The sealing and docking assembly 804 includes a snap ring 8046 and a rubber sleeve 8047. The snap ring 8046 is fixedly connected to the inner side of the housing 8043. The rubber sleeve 8047 is fixedly connected to the outer surface of the snap ring 8046. The rubber sleeve 8047 is located between the snap ring 8046 and the engaging groove 805. By limiting the left connecting ring 8041 and the right connecting ring 8042 inside the housing 8043, the first-level seal at the connection position is achieved. Through the engaging design of the snap ring 8046 and the engaging groove 805, the connection gap between the connecting block 8044 and the outer walls of the polytetrafluoroethylene hose 801 and the second polytetrafluoroethylene hard pipe 803 is reduced. The rubber sleeve 8047 provided on the outer surface of the snap ring 8046 can further fill the connection gap between the snap ring 8046 and the engaging groove 805, achieving the second-level seal at the connection position. One end of the air pipe assembly 8 is fixedly connected to a welding torch 9.,

[0034] In summary, combined with Figures 1-6As shown in the figure, the working principle of the high-temperature resistant equipment for welding is as follows: First, the left flange 701 and the right flange 706 are fixedly connected by the fastening bolts 708 to achieve the preliminary connection and fixation of the pressure gauge 5 and the first polytetrafluoroethylene hard pipe 802. Then, the air inside the hollow convex connecting part 702 and the hollow concave connecting part 707 is extracted by the air extraction pump 704 to make the inside vacuum. By using the air pressure difference between the inside and outside of the hollow convex connecting part 702 and the hollow concave connecting part 707, the two are closely fitted to seal the connection gap between the left flange 701 and the right flange 706. After connecting the air pipe assembly 8 to the pressure gauge 5, the operator holds the welding torch 9 to start the welding operation, and at the same time activates the solenoid valve 3, so that the protective gas in the gas storage tank 2 can pass through the pipeline to the nozzle on the welding torch 9 and be ejected through the nozzle to eject the protective gas during the welding process. Also, because the air pipe assembly 8 is composed of a polytetrafluoroethylene hose 801, a first polytetrafluoroethylene hard pipe 802, and a second polytetrafluoroethylene hard pipe 803 spliced together, the design of the polytetrafluoroethylene hose 801 facilitates the flexible use of the welding torch 9, while the first polytetrafluoroethylene hard pipe 802 and the second polytetrafluoroethylene hard pipe 803 facilitate the connection of the air pipe assembly 8 to the air supply mechanism and the welding torch 9. And the connection positions of the polytetrafluoroethylene hose 801 and the first polytetrafluoroethylene hard pipe 802, and the first polytetrafluoroethylene hard pipe 802 and the second polytetrafluoroethylene hard pipe 803 are all provided with a sealed docking assembly 804. By limiting the left connecting ring 8041 and the right connecting ring 8042 inside the housing 8043, the first layer of sealing is carried out on the connection position, and through the snap-fit design of the snap ring 8046 and the snap-fit groove 805, the connection gap between the connecting block 8044 and the outer walls of the polytetrafluoroethylene hose 801 and the second polytetrafluoroethylene hard pipe 803 is reduced. Moreover, the rubber sleeve 8047 provided on the outer surface of the snap ring 8046 can further fill the connection gap between the snap ring 8046 and the snap-fit groove 805 to carry out the second layer of sealing on the connection position. Through the coordinated use of the above parts, the overall airtightness of the polytetrafluoroethylene hose 801, the first polytetrafluoroethylene hard pipe 802, and the second polytetrafluoroethylene hard pipe 803 is relatively good, and the protective gas is not easily leaked from the connection position. During the welding process, since the pressure balancer 602 is connected to the gas storage tank 2 through the first connecting pipe 601 and is connected to the through pipe 4 through the second connecting pipe 603 and the pressure balance pipe 604, when the pressure balancer 602 detects an abnormal pressure, it can timely perform the pressure balance operation through the pressure balance pipe 604. The specific operation is as follows: When the pressure balancer 602 detects that the air pressure in the gas storage tank 2 is greater than the air pressure in the through pipe 4, it will increase the pressure in the through pipe 4 through gas supply. When it detects that the air pressure in the gas storage tank 2 is lower than the air pressure in the through pipe 4, it will reduce the pressure in the through pipe 4 through gas extraction.

[0035] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention so as to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A high-temperature resistant device for welding, comprising a base frame (1) and a through pipe (4), characterized in that, At the top of the base frame (1), an air storage tank (2) is fixedly installed, and the air storage tank (2) includes a main tank body (201), a pressure gauge (202), a safety protection device (203), an air inlet (204) and an air outlet (205). The pressure gauge (202) is arranged on the outer surface of the main tank body (201), and the safety protection device (203) is fixedly installed at the top of the main tank body (201). The air inlet (204) is arranged on the left side of the main tank body (201), and the air outlet (205) is arranged on the right side of the main tank body (201). The air outlet (205) is connected to a solenoid valve (3). One end of the connecting pipe (4) is connected to the solenoid valve (3), and the other end of the connecting pipe (4) is connected to a pressure gauge (5). The bottom of the air storage tank (2) is connected to a pressure balance assembly (6), and one end of the pressure balance assembly (6) is connected to the top of the connecting pipe (4) in a penetrating manner. On the right side of the pressure gauge (5), a connecting assembly (7) is fixedly connected, and the pressure gauge (5) is connected to an air pipe assembly (8) through the connecting assembly (7). One end of the air pipe assembly (8) is fixedly connected to a welding torch (9). The pressure balance assembly (6) includes a first connecting pipe (601), a pressure balancer (602), a second connecting pipe (603) and a pressure balance pipe (604). One end of the first connecting pipe (601) is connected to the pressure balancer (602), and the top of the pressure balancer (602) is fixedly connected to the second connecting pipe (603). The top of the second connecting pipe (603) is fixedly connected to the pressure balance pipe (604). One end of the pressure balance pipe (604) is connected to the outer wall of the connecting pipe (4) in a penetrating manner. During the welding process, since the pressure balancer (602) is connected to the air storage tank (2) through the first connecting pipe (601) and is connected to the connecting pipe (4) through the second connecting pipe (603) and the pressure balance pipe (604), when the pressure balancer (602) detects an abnormal pressure, it can timely perform a pressure balance operation through the pressure balance pipe (604). The specific operation is as follows: when the pressure balancer (602) detects that the air pressure in the air storage tank (2) is greater than the air pressure in the connecting pipe (4), it will increase the pressure in the connecting pipe (4) through gas supply; when it detects that the air pressure in the air storage tank (2) is lower than the air pressure in the connecting pipe (4), it will reduce the pressure in the connecting pipe (4) through gas extraction.

2. The high-temperature resistant device for welding according to claim 1, characterized in that, The connecting assembly (7) includes a left flange (701) and a hollow convex connecting piece (702). The left flange (701) is welded to the right side of the pressure gauge (5), and the hollow convex connecting piece (702) is installed inside the left flange (701). The inner surface of the left flange (701) is fixedly connected and fitted with the outer surface of the hollow convex connecting piece (702).

3. The high-temperature resistant device for welding according to claim 2, characterized in that, The connection component (7) further includes an air extraction pipe (703), an air extraction pump (704) and a ventilation hole (705). One side of the hollow convex connecting piece (702) is fixedly connected to the air extraction pipe (703), and the end of the air extraction pipe (703) is fixedly connected to the air extraction pump (704). Moreover, a ventilation hole (705) is formed on the other side of the hollow convex connecting piece (702).

4. The high-temperature resistant device for welding according to claim 3, characterized in that, The connection component (7) further includes a right flange (706), a hollow concave connecting piece (707) and fastening bolts (708). The right flange (706) is welded to the end of the air pipe component (8), and the inner surface of the right flange (706) is fixedly connected and fitted with the outer surface of the hollow concave connecting piece (707). Moreover, the outer wall of the right flange (706) is threadedly connected with the fastening bolts (708). At the same time, the right flange (706) is fixedly connected to the left flange (701) through the fastening bolts (708).

5. The high-temperature resistant device for welding according to claim 4, characterized in that, The hollow convex connecting piece (702) and the hollow concave connecting piece (707) form a snap-fit structure, and the shape and size of the hollow convex connecting piece (702) are both mutually matched with the shape and size of the hollow concave connecting piece (707).

6. The high-temperature resistant device for welding according to claim 5, characterized in that, The air pipe component (8) includes a polytetrafluoroethylene hose (801), a first polytetrafluoroethylene hard pipe (802), a second polytetrafluoroethylene hard pipe (803), a sealing and docking component (804) and a snap-fit groove (805). Both ends of the polytetrafluoroethylene hose (801) are connected to the sealing and docking component (804). One end of the polytetrafluoroethylene hose (801) is fixedly connected to the first polytetrafluoroethylene hard pipe (802) through the sealing and docking component (804). Moreover, the other end of the polytetrafluoroethylene hose (801) is fixedly connected to the second polytetrafluoroethylene hard pipe (803) through the sealing and docking component (804). At the same time, a snap-fit groove (805) is formed on the outer wall of the second polytetrafluoroethylene hard pipe (803).

7. The high-temperature resistant device for welding according to claim 6, characterized in that, The sealing and docking component (804) includes a left connecting ring (8041), a right connecting ring (8042), a housing (8043), a connecting block (8044) and a connecting bolt (8045). The left connecting ring (8041) is welded to the end of the polytetrafluoroethylene hose (801), and the right connecting ring (8042) is connected to the side of the left connecting ring (8041) away from the polytetrafluoroethylene hose (801). Moreover, the right connecting ring (8042) is welded to the end of the second polytetrafluoroethylene hard pipe (803). The outer part of the left connecting ring (8041) and the right connecting ring (8042) is covered with the housing (8043). The outer wall of the housing (8043) is fixedly connected to the connecting block (8044), and the connecting block (8044) is threadedly connected with the connecting bolt (8045) on one side.

8. A high-temperature resistant device for welding according to claim 7, characterized in that, The sealing and docking component (804) includes a snap ring (8046) and a rubber sleeve (8047). The snap ring (8046) is fixedly connected to the inner side of the housing (8043), and the rubber sleeve (8047) is fixedly connected to the outer surface of the snap ring (8046). Moreover, the rubber sleeve (8047) is located between the snap ring (8046) and the snap-fit groove (805).

9. A high-temperature resistant device for welding according to claim 8, characterized in that, The usage method of the high-temperature resistant equipment for welding includes the following steps: A. Connect the left flange (701) and the right flange (706) through the fastening bolt (708) to initially connect and fix the pressure gauge (5) and the first polytetrafluoroethylene hard pipe (802). Then, use the air extraction pump (704) to extract the air inside the hollow convex connecting part (702) and the hollow concave connecting part (707) to make it vacuum inside. Utilize the air pressure difference between the inside and outside of the hollow convex connecting part (702) and the hollow concave connecting part (707) to achieve their tight fit and seal the connection gap between the left flange (701) and the right flange (706), thus completing the connection of the air pipe assembly (8) and the pressure gauge (5); B. Start the solenoid valve (3) so that the protective gas in the gas storage tank (2) can pass through the pipeline to the nozzle on the welding torch (9) and be ejected through the nozzle. The operator holds the welding torch (9) to start the welding operation. The nozzle continuously ejects the protective gas during the welding process. Since the air pipe assembly (8) is composed of a polytetrafluoroethylene hose (801), the first polytetrafluoroethylene hard pipe (802) and the second polytetrafluoroethylene hard pipe (803) spliced together, the design of the polytetrafluoroethylene hose (801) facilitates the flexible use of the welding torch (9), while the first polytetrafluoroethylene hard pipe (802) and the second polytetrafluoroethylene hard pipe (803) facilitate the connection of the air pipe assembly (8) with the gas supply mechanism and the welding torch (9). And at the connection positions of the soft and hard pipes, there are sealing docking components (804). Use the connecting bolt (8045) to limit the left connecting ring (8041) and the right connecting ring (8042) inside the housing (8043) to conduct the first-level sealing of the connection position. And through the snap-fit design of the snap ring (8046) and the snap-fit groove (805), reduce the connection gap between the connecting block (8044) and the outer walls of the polytetrafluoroethylene hose (801) and the second polytetrafluoroethylene hard pipe (803). Moreover, the rubber sleeve (8047) arranged on the outer surface of the snap ring (8046) can further fill the connection gap between the snap ring (8046) and the snap-fit groove (805) to conduct the second-level sealing of the connection position. The double sealing improves the overall airtightness of the air pipe assembly (8); C. During the welding process, since the pressure balancer (602) is connected to the gas storage tank (2) through the first connecting pipe (601) and is connected to the through pipe (4) through the second connecting pipe (603) and the pressure balance pipe (604), when the pressure balancer (602) detects an abnormal pressure, it can promptly perform the pressure balance operation through the pressure balance pipe (604). When the pressure balancer (602) detects that the air pressure in the gas storage tank (2) is greater than the air pressure in the through pipe (4), it will increase the pressure in the through pipe (4) through gas supply. When it detects that the air pressure in the gas storage tank (2) is lower than the air pressure in the through pipe (4), it will reduce the pressure in the through pipe (4) through gas extraction.

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