Anti-tempering quartz welding gun and welding method

Abstract

The invention discloses an anti-tempering quartz welding gun and a welding method. The anti-tempering quartz welding gun and the welding method aim to overcome the defect that when a welding gun is used in a semi-closed area, the tempering phenomenon is prone to occurring. The gas mixing device comprises a grip and a gas mixing pipe which are connected together, a first gas channel and a second gas channel are arranged in the grip, a gas mixing cavity is formed in one end of the grip, the first gas channel and the second gas channel are both communicated with the gas mixing cavity, one end of the gas mixing pipe is communicated with the gas mixing cavity, and the other end of the gas mixing pipe is a fire spraying end; and the other end of the blowdown pipe faces the flaming end. When the anti-tempering quartz welding gun is used for welding, the tempering phenomenon can be completely eradicated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of quartz processing, more particularly, it relates to a backfire-proof quartz welding gun and welding method. BACKGROUND

[0002] The commonly used welding gun in the field of quartz processing is generally divided into ordinary welding gun, integrated welding gun, large-scale rotary disc welding gun and special welding gun. The welding gun can be normally used in open area and will not appear backfire phenomenon, but when used in semi-closed area, with the increase of combustion time, the oxygen amount in the semi-closed area decreases sharply, which will cause the outlet temperature of the quartz gun head to be overheated, the mixed gas to be expanded by heat and the pressure to be increased, thereby hindering the supply of combustible gas, i.e. hydrogen, and causing the mixed gas to burn in the quartz gun tube, resulting in backfire. The backfire will pollute the quartz gun tube and filter, thereby affecting the cleanliness of the mixed gas and affecting the appearance of the product, forming foreign matter groups or pitting on the surface of the quartz product. For example, the quartz welding gun disclosed in Chinese Patent Application No. 2009202708762 is also prone to backfire when used in semi-closed area. SUMMARY

[0003] In order to overcome the above-mentioned defects, the present application provides a backfire-proof quartz welding gun and welding method, which can prevent backfire when used.

[0004] In order to solve the above-mentioned technical problems, the present application adopts the following technical scheme: a backfire-proof quartz welding gun, comprising a handle and a mixed gas pipe connected together, a first gas channel and a second gas channel are arranged in the handle, a mixed gas cavity is arranged at one end of the handle, the first gas channel and the second gas channel are both in communication with the mixed gas cavity, one end of the mixed gas pipe is in communication with the mixed gas cavity, the other end of the mixed gas pipe is a flame spouting end, the mixed gas pipe is connected with a gas supplement pipe side by side, one end of the gas supplement pipe inputs oxygen, and the other end of the gas supplement pipe is arranged towards the flame spouting end.

[0005] When the quartz welding gun is used in semi-closed area, the handle is held, the flame spouting end is ignited, the spouted flame heats the welding position, and the welding operation is completed. During the welding process, hydrogen and oxygen are respectively input into the first gas channel and the second gas channel, the hydrogen and oxygen are mixed in the mixed gas cavity, the mixed gas is transported to the flame spouting end through the mixed gas pipe, the mixed gas spouted from the flame spouting end is burned to heat the welding position. The gas supplement pipe inputs oxygen and spouts from the other end of the gas supplement pipe towards the flame spouting position to provide combustion-supporting, which can keep the pressure at the outlet of the flame spouting end of the quartz welding gun basically constant, thereby ensuring that the hydrogen can be smoothly discharged and burned, and preventing the risk of backfire and gun explosion.

[0006] As a preferred, an adjusting valve is arranged in each of the first gas channel and the second gas channel, the adjusting valve is connected with an adjusting knob, and the adjusting knob is arranged outside the handle.

[0007] The size of the flame is adjusted by adjusting the size of the airflow in the first and second air passages through the adjusting valve.

[0008] The connecting nozzle is connected to the end of the mixing tube and the handle, and the connecting sleeve is connected to the mixing tube and the connecting nozzle.

[0009] The connecting sleeve is used to connect and position the connecting nozzle and the mixing tube, and the end face of the protruding ring on the end of the mixing tube is in close contact with the end face of the connecting nozzle to ensure the sealing performance.

[0010] The connecting nozzle is provided with a spiral turbulence sheet.

[0011] The hydrogen and oxygen are mixed uniformly through the turbulence effect during the flow of the mixed gas through the spiral turbulence sheet, thereby improving the combustion effect of the mixed gas at the flame end.

[0012] The mixing tube is provided with a turbulence chamber, a plurality of inclined baffle plates are installed in the turbulence chamber, the baffle plates are densely covered with air holes, the lower end of the baffle plate is in communication with the inner wall of the turbulence chamber, a flow gap is provided between the upper end of the baffle plate and the inner wall of the turbulence chamber, and the inclination directions of adjacent two baffle plates are opposite.

[0013] The mixed gas passes through the turbulence chamber, and the baffle plates block the mixed gas flow, causing turbulence in the turbulence chamber, thereby increasing the mixing effect of hydrogen and oxygen.

[0014] The mixing tube is provided with a mounting seat, a universal ball is mounted on the mounting seat, a positioning insertion hole is provided on the universal ball, and the positioning insertion hole is adapted to be inserted and welded with an electrode.

[0015] During welding, the electrode is inserted and positioned in the positioning insertion hole on the universal ball, which facilitates welding operation and prevents the electrode from deviating during welding.

[0016] In another embodiment, the mixing tube is provided with a mounting seat, a driving connecting rod is rotatably connected to the mounting seat, a feeding insertion hole is provided on the mounting seat, a buffer sleeve is provided on one end of the driving connecting rod, a pull rope is connected to the other end of the driving connecting rod, a pre-tightening spring is connected between the driving connecting rod and the mounting seat, a pull ring is connected to the pull rope, the pull ring is placed on the handle, the electrode is inserted and welded in the feeding insertion hole, and the electrode is sleeved with the buffer sleeve.

[0017] During the welding process, firstly, the welding rod is inserted into the feeding insertion hole, then the handle is held by hand, the pull ring is sleeved on the finger, the flame end is ignited, the flame is aimed at the welding position, the pull rope is pulled back and forth by the finger, so that the welding rod is pushed forward, and the welding rod is welded to the welding position after melting. Through the structure setting, the welding and the pushing operation of the welding rod can be realized by one hand, and the welding operation is simplified. Especially when welding in some narrow space, the interference phenomenon of holding the welding rod by hand is avoided.

[0018] As preferred, the flame end of the mixed gas pipe is inclined.

[0019] The flame end is inclined, the flame direction is inclined, and the welding operation is facilitated.

[0020] As preferred, the air supplement pipe is connected with the air feeding hose, and the air feeding pipe is connected with the bypass valve.

[0021] The on-off of the bypass valve realizes the on-off of the oxygen in the air supplement pipe, and the operation is flexible and convenient.

[0022] A welding method, using the anti-backfire quartz welding gun to weld, firstly, the welding rod is inserted into the feeding insertion hole, then the handle is held by hand, the pull ring is sleeved on the finger, the flame end is ignited, the flame is aimed at the welding position, the pull rope is pulled back and forth by the finger, so that the welding rod is pushed forward, and the welding rod is welded to the welding position after melting.

[0023] During the welding, the handle is held by one hand, the welding and the pushing operation of the welding rod can be realized, and the welding operation is simplified. Especially when welding in some narrow space, the interference phenomenon of holding the welding rod by hand is avoided.

[0024] Compared with the prior art, the anti-backfire quartz welding gun can prevent backfire during welding operation; during the process that the mixed gas flows through the spiral turbulence sheet, the turbulence effect is generated, the hydrogen and oxygen are uniformly mixed, and the combustion effect of the mixed gas at the flame end is improved; the mixed gas passes through the turbulence cavity, the mixed gas flow is blocked by the baffle, the turbulence effect is generated in the turbulence cavity, and the mixing effect of the hydrogen and oxygen is improved; during the welding process, the welding rod is positioned by the positioning insertion hole on the universal ball, the welding operation is facilitated, and the welding rod is prevented from deviating during the welding process; during the welding, the handle is held by one hand, the welding and the pushing operation of the welding rod can be realized, and the welding operation is simplified. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is the structure diagram of the embodiment 1 of the present application.

[0026] Figure 2 It is the structure diagram of the embodiment 2 of the present application.

[0027] Figure 3 It is the structure diagram of the embodiment 3 of the present application.

[0028] Figure 4 is a structural diagram of embodiment 4 of the present application.

[0029] Figure 5 is a structural diagram of embodiment 5 of the present application.

[0030] Figure 6 is a structural diagram of embodiment 6 of the present application.

[0031] Figure 7 is a structural diagram of embodiment 7 of the present application.

[0032] Figure 8 is a structural diagram of embodiment 8 of the present application.

[0033] Figure 9 is a structural diagram of embodiment 9 of the present application.

[0034] In the figure: 1, handle, 2, mixed gas pipe, 3, first airway, 4, second airway, 5, mixed gas cavity, 6, fire spouting end, 7, air supplement pipe, 8, connecting block, 9, adjusting valve, 10, adjusting knob, 11, left valve body, 12, right valve body, 13, ball, 14, through-flow hole, 15, rotating shaft, 16, connecting nozzle, 17, connecting sleeve, 18, convex ring, 19, end cover, 20, air feeding hose, 21, bypass valve, 22, three-way joint, 23, mounting seat, 24, universal ball, 25, positioning insertion hole, 26, welding rod, 27, driving connecting rod, 28, feeding insertion hole, 29, buffer sleeve, 30, pull rope, 31, pre-tightening spring, 32, avoiding groove, 33, pull ring, 34, support, 35, via hole, 36, helical turbulence sheet, 37, turbulence cavity, 38, turbulence cylinder, 39, flow blocking plate, 40, through-flow gap. DETAILED DESCRIPTION

[0035] The technical solutions of the present application will be further described in detail below by specific embodiments, and in conjunction with the drawings: Embodiment 1: A backfire-proof quartz welding torch (see Figure 1 ), comprising a handle 1 and a mixed gas pipe 2 connected together, the handle 1 is of metal material, the mixed gas pipe 2 is of quartz material, a first airway 3 and a second airway 4 are arranged in the handle 1, the first airway 3 is connected to hydrogen gas, and the second airway 4 is connected to oxygen gas. A mixed gas cavity 5 is arranged at one end of the handle 1, the first airway 3 and the second airway 4 are both in communication with the mixed gas cavity 5, one end of the mixed gas pipe 2 is in communication with the mixed gas cavity 5, the other end of the mixed gas pipe 2 is a fire spouting end 6, the fire spouting end 6 of the mixed gas pipe 2 is arranged obliquely, the mixed gas pipe 2 is connected to an air supplement pipe 7 side by side, the air supplement pipe 7 is of quartz material, the air supplement pipe 7 and the mixed gas pipe 2 are welded together through a connecting block 8, one end of the air supplement pipe 7 is connected to oxygen gas, and the other end of the air supplement pipe 7 is arranged towards the fire spouting end 6.

[0036] The first air passage 3 and the second air passage 4 are both provided with an adjusting valve 9, the adjusting valve 9 is connected with an adjusting knob 10, and the adjusting knob 10 is arranged outside the handle 1. The adjusting valve 9 comprises a left valve body 11, a right valve body 12 and a ball body 13, the ball body 13 is adapted to be sleeved between the left valve body 11 and the right valve body 12, the ball body 13 is provided with a through-flow hole 14, the ball body 13 is tightly connected with a rotating shaft 15, the rotating shaft 15 penetrates out of the handle 1, and the adjusting knob 10 is tightly connected with the rotating shaft 15. The size of the airflow in the first air passage 3 and the second air passage 4 is adjusted through the adjusting valve 9, so that the size of the flame is adjusted. The adjusting knob 10 is used for adjusting the adjusting valve 9, and the operation is convenient.

[0037] The handle 1 is provided with a connecting nozzle 16 communicated with the mixed gas cavity 5, the mixed gas pipe 2 is sleeved with a connecting sleeve 17, the mixed gas pipe 2 is provided with a convex ring 18 at the end, the end surface of the convex ring 18 abuts against the end surface of the connecting nozzle 16, and the connecting sleeve 17 is connected between the mixed gas pipe 2 and the connecting nozzle 16. The connecting sleeve 17 is provided with a stepped hole, the transition surface of the stepped hole is abutted and positioned with the convex ring 18, and the connecting sleeve 17 is threadedly connected with the outer wall of the connecting nozzle 16. The handle 1 is tightly connected with an end cover 19 at the end, and the mixed gas cavity 5 is arranged between the end cover 19 and the end of the handle 1. The connecting nozzle 16 is arranged on the connecting sleeve 17.

[0038] The air supplement pipe 7 is connected with a gas supply hose 20, the end of the air supplement pipe 7 is in a tapered structure, so as to be conveniently connected with the gas supply hose 20, and a bypass valve 21 is connected with the gas supply pipe. The handle 1 is provided with a first gas nozzle and a second gas nozzle at the end, and the first gas nozzle and the second gas nozzle are respectively communicated with the first air passage 3 and the second air passage 4. The second gas nozzle is connected with a three-way joint 22, and the bypass valve 21 is connected with the three-way joint 22.

[0039] When the quartz welding torch is used in a semi-closed area, during the welding process, the first air passage 3 and the second air passage 4 are respectively connected with hydrogen and oxygen, the hydrogen and the oxygen are mixed in the mixed gas cavity 5, the mixed gas is transported to the flame spouting end 6 through the mixed gas pipe 2, the mixed gas spouted from the flame spouting end 6 is burned, and the welding position is heated. The air supplement pipe 7 inputs oxygen, and the oxygen is spouted from the other end of the air supplement pipe 7 towards the flame spouting position, so as to provide combustion-supporting, the pressure at the outlet of the flame spouting end 6 of the quartz welding torch can be kept basically constant, so that the hydrogen can be smoothly discharged and burned, and the risk of backfire and explosion of the torch is prevented.

[0040] Embodiment 2: A backfire-proof quartz welding torch (see Figure 2), comprising a handle 1 and a mixing tube 2 connected together, the handle 1 is made of metal, the mixing tube 2 is made of quartz, a first gas channel 3 and a second gas channel 4 are arranged in the handle 1, the first gas channel 3 is connected to hydrogen, and the second gas channel 4 is connected to oxygen. The handle 1 is provided with a mixing cavity 5 at one end, the first gas channel 3 and the second gas channel 4 are communicated with the mixing cavity 5, one end of the mixing tube 2 is communicated with the mixing cavity 5, the other end of the mixing tube 2 is a flame spouting end 6, the flame spouting end 6 of the mixing tube 2 is arranged obliquely, the mixing tube 2 is connected with a gas supplementing tube 7 side by side, the gas supplementing tube 7 is made of quartz, the gas supplementing tube 7 is welded with the mixing tube 2 through a connecting block 8, one end of the gas supplementing tube 7 is connected to oxygen, and the other end of the gas supplementing tube 7 is arranged towards the flame spouting end 6.

[0041] Adjusting valves 9 are arranged in the first gas channel 3 and the second gas channel 4, the adjusting valves 9 are connected with adjusting knobs 10, and the adjusting knobs 10 are arranged outside the handle 1. The adjusting valve 9 comprises a left valve body 11, a right valve body 12 and a ball body 13, the ball body 13 is adapted to be sleeved between the left valve body 11 and the right valve body 12, a through hole 14 is arranged on the ball body 13, the ball body 13 is tightly connected with a rotating shaft 15, the rotating shaft 15 penetrates out of the handle 1, and the adjusting knob 10 is tightly connected with the rotating shaft 15. The adjusting valves 9 are used to adjust the flow of the first gas channel 3 and the second gas channel 4, so as to adjust the size of the flame. The adjusting knobs 10 are used to adjust the adjusting valves 9, and the operation is convenient.

[0042] A connecting nozzle 16 is arranged at the end of the handle 1 and communicated with the mixing cavity 5, a connecting sleeve 17 is sleeved on the mixing tube 2, a convex ring 18 is arranged at the end of the mixing tube 2, the end surface of the convex ring 18 is abutted on the end surface of the connecting nozzle 16, and the connecting sleeve 17 is connected between the mixing tube 2 and the connecting nozzle 16. A stepped hole is arranged in the connecting sleeve 17, the transition surface of the stepped hole is abutted and positioned with the convex ring 18, and the connecting sleeve 17 is threadedly connected with the outer wall of the connecting nozzle 16. An end cover 19 is tightly connected with the end of the handle 1, and the mixing cavity 5 is arranged between the end cover 19 and the end of the handle 1. The connecting nozzle 16 is arranged on the connecting sleeve 17.

[0043] Spiral turbulence pieces 36 are arranged in the connecting nozzle 16. In the process that the mixed gas flows through the spiral turbulence pieces 36, the turbulence effect is generated, the hydrogen and the oxygen are uniformly mixed, and thus the combustion effect of the mixed gas at the flame spouting end 6 is improved.

[0044] The gas supplementing tube 7 is connected with a gas conveying hose 20, the end of the gas supplementing tube 7 is in a conical structure, the gas supplementing tube 7 is convenient to connect with the gas conveying hose 20, and a bypass valve 21 is connected with the gas conveying hose. First and second gas nozzles are arranged at the end of the handle 1, and the first and second gas nozzles are respectively communicated with the first and second gas channels 3 and 4. A three-way joint 22 is connected with the second gas nozzle, and the bypass valve 21 is connected with the three-way joint 22.

[0045] When the quartz welding torch is used in a semi-closed area, during the welding process, hydrogen and oxygen are respectively introduced into the first gas channel 3 and the second gas channel 4, the hydrogen and oxygen are mixed in the mixing chamber 5, the mixed gas is transported to the flame spouting end 6 through the mixing pipe 2, the mixed gas spouted from the flame spouting end 6 is burned to heat the welding position. The oxygen is input from the oxygen supplement pipe 7 and spouted from the other end of the oxygen supplement pipe 7 towards the flame spouting position to provide combustion support, which can keep the pressure at the outlet of the flame spouting end 6 of the quartz welding torch substantially constant, thereby ensuring that the hydrogen can be smoothly discharged and burned to prevent the risk of backfire and torch explosion.

[0046] Embodiment 3: A backfire-proof quartz welding torch (see Figure 3 ), comprising a handle 1 and a mixing pipe 2 connected together, the handle 1 is made of metal, the mixing pipe 2 is made of quartz, the handle 1 is provided with a first gas channel 3 and a second gas channel 4, the first gas channel 3 is connected to hydrogen, and the second gas channel 4 is connected to oxygen. The handle 1 is provided with a mixing chamber 5 at one end, the first gas channel 3 and the second gas channel 4 are both in communication with the mixing chamber 5, one end of the mixing pipe 2 is in communication with the mixing chamber 5, the other end of the mixing pipe 2 is a flame spouting end 6, the flame spouting end 6 of the mixing pipe 2 is obliquely arranged, the mixing pipe 2 is connected to an oxygen supplement pipe 7 side by side, the oxygen supplement pipe 7 is made of quartz, the oxygen supplement pipe 7 and the mixing pipe 2 are welded together through a connecting block 8, one end of the oxygen supplement pipe 7 is connected to oxygen, and the other end of the oxygen supplement pipe 7 is arranged towards the flame spouting end 6.

[0047] Adjusting valves 9 are installed in the first gas channel 3 and the second gas channel 4, the adjusting valves 9 are connected to adjusting knobs 10, and the adjusting knobs 10 are arranged outside the handle 1. The adjusting valve 9 comprises a left valve body 11, a right valve body 12 and a ball body 13, the ball body 13 is adapted to be sleeved between the left valve body 11 and the right valve body 12, a through hole 14 is arranged on the ball body 13, the ball body 13 is tightly connected to a rotating shaft 15, the rotating shaft 15 penetrates out of the handle 1, and the adjusting knob 10 is tightly connected to the rotating shaft 15. The adjusting valves 9 are used to adjust the flow of the gas in the first gas channel 3 and the second gas channel 4, thereby adjusting the size of the flame. The adjusting knobs 10 are used to adjust the adjusting valves 9, which is convenient to operate.

[0048] A connecting nozzle 16 is arranged at the end of the handle 1 and is in communication with the mixing chamber 5, a connecting sleeve 17 is sleeved on the mixing pipe 2, a convex ring 18 is arranged at the end of the mixing pipe 2, the end surface of the convex ring 18 abuts against the end surface of the connecting nozzle 16, and the connecting sleeve 17 is connected between the mixing pipe 2 and the connecting nozzle 16. A stepped hole is arranged in the connecting sleeve 17, the transition surface of the stepped hole is in abutment with the convex ring 18 for positioning, and the connecting sleeve 17 is threadedly connected with the outer wall of the connecting nozzle 16. An end cover 19 is tightly connected with the end of the handle 1, and the mixing chamber 5 is arranged between the end cover 19 and the end of the handle 1. The connecting nozzle 16 is arranged on the connecting sleeve 17.

[0049] The turbulence cavity 37 is arranged on the mixed gas pipe 2, the turbulence cylinder 38 is arranged on the mixed gas pipe 2, the turbulence cavity 37 is arranged in the turbulence cylinder 38, a plurality of inclined baffles 39 are arranged in the turbulence cavity 37, the baffles 39 are densely provided with air holes, the lower end of the baffle 39 is communicated with the inner wall of the turbulence cavity 37, the through gap 40 is arranged between the upper end of the baffle 39 and the inner wall of the turbulence cavity 37, and the inclination directions of the adjacent two baffles 39 are opposite. The mixed gas passes through the turbulence cavity 37, the baffle 39 blocks the mixed gas flow, so that the gas flow generates turbulence effect in the turbulence cavity 37, thereby increasing the mixing effect of hydrogen and oxygen.

[0050] The air supplement pipe 7 is connected with the air supply hose 20, the end of the air supplement pipe 7 is in a conical structure, which is convenient for connecting with the air supply hose 20, and the air supply pipe is connected with the bypass valve 21. The first gas nozzle and the second gas nozzle are arranged at the end of the handle 1, and the first gas nozzle and the second gas nozzle are respectively communicated with the first gas channel 3 and the second gas channel 4. The three-way joint 22 is connected with the second gas nozzle, and the bypass valve 21 is connected with the three-way joint 22.

[0051] When the quartz welding torch is used in a semi-closed area, hydrogen and oxygen are respectively introduced into the first gas channel 3 and the second gas channel 4 during the welding process, the hydrogen and oxygen are mixed in the mixed gas cavity 5, the mixed gas is transported to the flame spouting end 6 through the mixed gas pipe 2, the mixed gas spouted from the flame spouting end 6 is burned to heat the welding position. Oxygen is input into the air supplement pipe 7 and spouted from the other end of the air supplement pipe 7 towards the flame spouting position to provide combustion-supporting, so that the pressure at the outlet of the flame spouting end 6 of the quartz welding torch can be kept basically constant, thereby ensuring that the hydrogen can be smoothly discharged and burned, and preventing the risk of backfire and explosion of the torch.

[0052] Embodiment 4: A backfire-proof quartz welding torch (see Figure 4 ), comprising a handle 1 and a mixed gas pipe 2 connected together, the handle 1 is made of metal material, the mixed gas pipe 2 is made of quartz material, the first gas channel 3 and the second gas channel 4 are arranged in the handle 1, the first gas channel 3 is connected with hydrogen, and the second gas channel 4 is connected with oxygen. The mixed gas cavity 5 is arranged at one end of the handle 1, the first gas channel 3 and the second gas channel 4 are communicated with the mixed gas cavity 5, one end of the mixed gas pipe 2 is communicated with the mixed gas cavity 5, the other end of the mixed gas pipe 2 is the flame spouting end 6, the flame spouting end 6 of the mixed gas pipe 2 is arranged in an inclined manner, the mixed gas pipe 2 is connected with the air supplement pipe 7 in parallel, the air supplement pipe 7 is made of quartz material, the air supplement pipe 7 and the mixed gas pipe 2 are welded together through the connecting block 8, one end of the air supplement pipe 7 inputs oxygen, and the other end of the air supplement pipe 7 is arranged towards the flame spouting end 6.

[0053] The first air passage 3 and the second air passage 4 are both provided with an adjusting valve 9, the adjusting valve 9 is connected with an adjusting knob 10, and the adjusting knob 10 is arranged outside the handle 1. The adjusting valve 9 comprises a left valve body 11, a right valve body 12 and a ball body 13, the ball body 13 is adapted to be sleeved between the left valve body 11 and the right valve body 12, the ball body 13 is provided with a through-flow hole 14, the ball body 13 is tightly connected with a rotating shaft 15, the rotating shaft 15 penetrates out of the handle 1, and the adjusting knob 10 is tightly connected with the rotating shaft 15. The size of the airflow in the first air passage 3 and the second air passage 4 is adjusted through the adjusting valve 9, and then the size of the flame is adjusted. The adjusting knob 10 is used for adjusting the adjusting valve 9, and the operation is convenient.

[0054] The handle 1 is provided with a connecting nozzle 16 communicated with the mixing cavity 5, the mixing pipe 2 is sleeved with a connecting sleeve 17, the mixing pipe 2 is provided with a convex ring 18 at an end, the end surface of the convex ring 18 is abutted against the end surface of the connecting nozzle 16, and the connecting sleeve 17 is connected between the mixing pipe 2 and the connecting nozzle 16. The connecting sleeve 17 is provided with a stepped hole, the transition surface of the stepped hole is abutted against the convex ring 18 for positioning, and the connecting sleeve 17 is threadedly connected with the outer wall of the connecting nozzle 16. The handle 1 is tightly connected with an end cover 19, and the mixing cavity 5 is arranged between the end cover 19 and the end of the handle 1. The connecting nozzle 16 is arranged on the connecting sleeve 17.

[0055] The gas supplement pipe 7 is connected with a gas supply hose 20, the end of the gas supplement pipe 7 is in a conical structure, so that the gas supplement pipe 7 is convenient to connect with the gas supply hose 20, and a bypass valve 21 is connected with the gas supply hose. The handle 1 is provided with a first gas nozzle and a second gas nozzle at an end, and the first gas nozzle and the second gas nozzle are respectively communicated with the first air passage 3 and the second air passage 4. The second gas nozzle is connected with a three-way joint 22, and the bypass valve 21 is connected with the three-way joint 22.

[0056] The mixing pipe 2 is provided with a mounting seat 23, the mounting seat 23 is arranged close to the flame spouting end 6, a universal ball 24 is mounted on the mounting seat 23 and rotates in all directions, the universal ball 24 is provided with a positioning insertion hole 25, and a welding rod 26 is adapted to be inserted and mounted in the positioning insertion hole 25. In the welding process, the welding rod 26 is inserted and positioned in the positioning insertion hole 25 on the universal ball 24, so that the welding operation is facilitated, and the welding rod 26 is prevented from deviating in the welding process.

[0057] When the quartz welding torch is used in a semi-closed area, the first air passage 3 and the second air passage 4 are respectively connected with hydrogen and oxygen in the welding process, the hydrogen and the oxygen are mixed in the mixing cavity 5, the mixed gas is delivered to the flame spouting end 6 through the mixing pipe 2, the mixed gas is burned after being spouted from the flame spouting end 6, and the welding position is heated. The gas supplement pipe 7 inputs oxygen and spouts the oxygen from the other end of the gas supplement pipe 7 towards the flame spouting position, so that combustion is assisted, the pressure at the outlet of the flame spouting end 6 of the quartz welding torch can be kept basically constant, the hydrogen can be smoothly discharged and burned, and the risk of backfire and explosion of the torch is prevented.

[0058] Embodiment 5: A backfire-proof quartz welding torch (see Figure 5), comprising a handle 1 and a mixing tube 2 connected together, the handle 1 is made of metal, the mixing tube 2 is made of quartz, a first gas channel 3 and a second gas channel 4 are arranged in the handle 1, the first gas channel 3 is connected to hydrogen, and the second gas channel 4 is connected to oxygen. A mixing cavity 5 is arranged at one end of the handle 1, the first gas channel 3 and the second gas channel 4 are communicated with the mixing cavity 5, one end of the mixing tube 2 is communicated with the mixing cavity 5, the other end of the mixing tube 2 is a flame spouting end 6, the flame spouting end 6 of the mixing tube 2 is arranged obliquely, the mixing tube 2 is connected with a gas supplementing tube 7 side by side, the gas supplementing tube 7 is made of quartz, the gas supplementing tube 7 is welded with the mixing tube 2 through a connecting block 8, one end of the gas supplementing tube 7 is connected to oxygen, and the other end of the gas supplementing tube 7 is arranged towards the flame spouting end 6.

[0059] Adjusting valves 9 are arranged in the first gas channel 3 and the second gas channel 4, the adjusting valves 9 are connected with adjusting knobs 10, and the adjusting knobs 10 are arranged outside the handle 1. The adjusting valve 9 comprises a left valve body 11, a right valve body 12 and a ball body 13, the ball body 13 is adapted to be sleeved between the left valve body 11 and the right valve body 12, a through hole 14 is arranged on the ball body 13, the ball body 13 is tightly connected with a rotating shaft 15, the rotating shaft 15 penetrates out of the handle 1, and the adjusting knob 10 is tightly connected with the rotating shaft 15. The adjusting valves 9 are used to adjust the flow of the first gas channel 3 and the second gas channel 4, so as to adjust the size of the flame. The adjusting knobs 10 are used to adjust the adjusting valves 9, and the operation is convenient.

[0060] A connecting mouth 16 is arranged at the end of the handle 1 and communicated with the mixing cavity 5, a connecting sleeve 17 is sleeved on the mixing tube 2, a convex ring 18 is arranged at the end of the mixing tube 2, the end surface of the convex ring 18 is abutted on the end surface of the connecting mouth 16, and the connecting sleeve 17 is connected between the mixing tube 2 and the connecting mouth 16. A stepped hole is arranged in the connecting sleeve 17, the transition surface of the stepped hole is abutted and positioned with the convex ring 18, and the connecting sleeve 17 is threadedly connected with the outer wall of the connecting mouth 16. An end cover 19 is tightly connected with the end of the handle 1, and the mixing cavity 5 is arranged between the end cover 19 and the end of the handle 1. The connecting mouth 16 is arranged on the connecting sleeve 17.

[0061] Spiral turbulence pieces 36 are arranged in the connecting mouth 16. In the process that the mixed gas flows through the spiral turbulence pieces 36, the turbulence effect is generated, the hydrogen and the oxygen are uniformly mixed, and thus the combustion effect of the mixed gas at the flame spouting end 6 is improved.

[0062] The gas supplementing tube 7 is connected with a gas conveying hose 20, the end of the gas supplementing tube 7 is in a conical structure, the gas supplementing tube 7 is convenient to connect with the gas conveying hose 20, and a bypass valve 21 is connected with the gas conveying hose. First and second gas mouths are arranged at the end of the handle 1, the first and second gas mouths are respectively communicated with the first and second gas channels 3 and 4. A three-way joint 22 is connected with the second gas mouth, and the bypass valve 21 is connected with the three-way joint 22.

[0063] The mounting seat 23 is arranged on the mixed gas pipe 2, the mounting seat 23 is arranged close to the flame spraying end 6, the universal ball 24 is arranged on the mounting seat 23, the positioning hole 25 is arranged on the universal ball 24, and the welding rod 26 is inserted and arranged in the positioning hole 25. During the welding process, the welding rod 26 is inserted and positioned in the positioning hole 25 on the universal ball 24, so that the welding operation is facilitated, and the welding rod 26 is prevented from deviating during the welding process.

[0064] When the quartz welding gun is used in a semi-closed area, hydrogen and oxygen are respectively introduced into the first gas channel 3 and the second gas channel 4 during the welding process, the hydrogen and the oxygen are mixed in the mixed gas chamber 5, the mixed gas is transported to the flame spraying end 6 through the mixed gas pipe 2, the mixed gas sprayed from the flame spraying end 6 is burned, and the welding position is heated. The oxygen is input from the gas supplement pipe 7, and the oxygen is sprayed from the other end of the gas supplement pipe 7 towards the flame spraying position, combustion-supporting is provided, the pressure at the outlet of the flame spraying end 6 of the quartz welding gun can be kept basically constant, so that the hydrogen can be smoothly discharged and burned, and the risk of backfire and gun explosion is prevented.

[0065] Embodiment 6: A backfire-proof quartz welding gun (see Figure 6 ), comprising a handle 1 and a mixed gas pipe 2 connected together, the handle 1 is made of metal, the mixed gas pipe 2 is made of quartz, the first gas channel 3 and the second gas channel 4 are arranged in the handle 1, the first gas channel 3 is used for inputting hydrogen, and the second gas channel 4 is used for inputting oxygen. The mixed gas chamber 5 is arranged at one end of the handle 1, the first gas channel 3 and the second gas channel 4 are communicated with the mixed gas chamber 5, one end of the mixed gas pipe 2 is communicated with the mixed gas chamber 5, the other end of the mixed gas pipe 2 is the flame spraying end 6, the flame spraying end 6 of the mixed gas pipe 2 is arranged in an inclined manner, the mixed gas pipe 2 is connected with the gas supplement pipe 7 in parallel, the gas supplement pipe 7 is made of quartz, the gas supplement pipe 7 and the mixed gas pipe 2 are welded together through the connecting block 8, one end of the gas supplement pipe 7 is used for inputting oxygen, and the other end of the gas supplement pipe 7 is arranged towards the flame spraying end 6.

[0066] The adjusting valve 9 is arranged in the first gas channel 3 and the second gas channel 4, the adjusting valve 9 is connected with the adjusting knob 10, and the adjusting knob 10 is arranged outside the handle 1. The adjusting valve 9 comprises a left valve body 11, a right valve body 12 and a ball body 13, the ball body 13 is sleeved between the left valve body 11 and the right valve body 12, the through hole 14 is arranged on the ball body 13, the ball body 13 is tightly connected with the rotating shaft 15, the rotating shaft 15 penetrates out of the handle 1, and the adjusting knob 10 is tightly connected with the rotating shaft 15. The size of the gas flow in the first gas channel 3 and the second gas channel 4 is adjusted through the adjusting valve 9, so that the size of the flame is adjusted. The adjusting knob 10 is used for adjusting the adjusting valve 9, and the operation is convenient.

[0067] The end of the handle 1 is provided with a connecting nozzle 16 communicating with the mixing chamber 5. A connecting sleeve 17 is sleeved on the mixing tube 2. The end of the mixing tube 2 is provided with a protruding ring 18. The end surface of the protruding ring 18 abuts against the end surface of the connecting nozzle 16. The connecting sleeve 17 is connected between the mixing tube 2 and the connecting nozzle 16. A stepped hole is arranged in the connecting sleeve 17. The transition surface of the stepped hole abuts against the protruding ring 18. The connecting sleeve 17 is threadedly connected with the outer wall of the connecting nozzle 16. The end of the handle 1 is tightly connected with an end cover 19. The mixing chamber 5 is arranged between the end cover 19 and the end of the handle 1. The connecting nozzle 16 is arranged on the connecting sleeve 17.

[0068] A turbulent flow chamber 37 is arranged on the mixing tube 2. A turbulent flow cylinder 38 is mounted on the mixing tube 2. The turbulent flow chamber 37 is arranged in the turbulent flow cylinder 38. A plurality of inclined baffle plates 39 are mounted in the turbulent flow chamber 37. The baffle plates 39 are densely provided with air holes. The lower end of the baffle plate 39 communicates with the inner wall of the turbulent flow chamber 37. The upper end of the baffle plate 39 and the inner wall of the turbulent flow chamber 37 are provided with a flow gap 40. The inclination directions of adjacent two baffle plates 39 are opposite. The mixed gas passes through the turbulent flow chamber 37. The baffle plates 39 block the mixed gas flow, so that the gas flow generates turbulent flow effect in the turbulent flow chamber 37, thereby increasing the mixing effect of hydrogen and oxygen.

[0069] The gas supplement tube 7 is connected with a gas delivery hose 20. The end of the gas supplement tube 7 is conical in structure, which is convenient for connecting with the gas delivery hose 20. A bypass valve 21 is connected with the gas delivery hose. The end of the handle 1 is provided with a first gas nozzle and a second gas nozzle. The first gas nozzle and the second gas nozzle respectively correspond to the first gas channel 3 and the second gas channel 4. The second gas nozzle is connected with a three-way joint 22. The bypass valve 21 is connected with the three-way joint 22.

[0070] A mounting seat 23 is arranged on the mixing tube 2. The mounting seat 23 is arranged close to the flame spouting end 6. A universal ball 24 is mounted on the mounting seat 23. The universal ball 24 is provided with a positioning insertion hole 25. The positioning insertion hole 25 is adapted to be inserted and welded with a welding rod 26. In the welding process, the welding rod 26 is inserted and positioned in the positioning insertion hole 25 on the universal ball 24, which facilitates the welding operation and prevents the welding rod 26 from deviating in the welding process.

[0071] When the quartz welding torch is used in a semi-closed area, hydrogen and oxygen are respectively introduced into the first gas channel 3 and the second gas channel 4 in the welding process. The hydrogen and oxygen are mixed in the mixing chamber 5. The mixed gas is delivered to the flame spouting end 6 through the mixing tube 2. The mixed gas spouted from the flame spouting end 6 is burned to heat the welding position. Oxygen is input into the gas supplement tube 7 and spouted from the other end of the gas supplement tube 7 towards the flame spouting position to provide combustion support. The pressure at the outlet of the flame spouting end 6 of the quartz welding torch can be kept basically constant, so that the hydrogen can be smoothly discharged and burned, thereby preventing the risk of backfire and explosion of the torch.

[0072] Example 7: A backfire-proof quartz welding torch (see Figure 7), comprising a handle 1 and a mixing tube 2 connected together, the handle 1 is made of metal, the mixing tube 2 is made of quartz, a first gas channel 3 and a second gas channel 4 are arranged in the handle 1, the first gas channel 3 is connected to hydrogen, and the second gas channel 4 is connected to oxygen. A mixing cavity 5 is arranged at one end of the handle 1, the first gas channel 3 and the second gas channel 4 are communicated with the mixing cavity 5, one end of the mixing tube 2 is communicated with the mixing cavity 5, the other end of the mixing tube 2 is a flame spouting end 6, the flame spouting end 6 of the mixing tube 2 is arranged obliquely, the mixing tube 2 is connected with a gas supplementing tube 7 side by side, the gas supplementing tube 7 is made of quartz, the gas supplementing tube 7 is welded with the mixing tube 2 through a connecting block 8, one end of the gas supplementing tube 7 is connected to oxygen, and the other end of the gas supplementing tube 7 is arranged towards the flame spouting end 6.

[0073] Adjusting valves 9 are arranged in the first gas channel 3 and the second gas channel 4, the adjusting valves 9 are connected with adjusting knobs 10, and the adjusting knobs 10 are arranged outside the handle 1. The adjusting valve 9 comprises a left valve body 11, a right valve body 12 and a ball body 13, the ball body 13 is adapted to be sleeved between the left valve body 11 and the right valve body 12, a through hole 14 is arranged on the ball body 13, the ball body 13 is tightly connected with a rotating shaft 15, the rotating shaft 15 penetrates out of the handle 1, and the adjusting knob 10 is tightly connected with the rotating shaft 15. The size of the gas flow in the first gas channel 3 and the second gas channel 4 is adjusted through the adjusting valve 9, so that the size of the flame is adjusted. The adjusting knob 10 is used for adjusting the adjusting valve 9, and the operation is convenient.

[0074] A connecting mouth 16 communicated with the mixing cavity 5 is arranged at the end of the handle 1, a connecting sleeve 17 is sleeved on the mixing tube 2, a convex ring 18 is arranged at the end of the mixing tube 2, the end surface of the convex ring 18 is abutted on the end surface of the connecting mouth 16, and the connecting sleeve 17 is connected between the mixing tube 2 and the connecting mouth 16. A stepped hole is arranged in the connecting sleeve 17, the transition surface of the stepped hole is abutted and positioned with the convex ring 18, and the connecting sleeve 17 is threadedly connected with the outer wall of the connecting mouth 16. An end cover 19 is tightly connected with the end of the handle 1, and the mixing cavity 5 is arranged between the end cover 19 and the end of the handle 1. The connecting mouth 16 is arranged on the connecting sleeve 17.

[0075] The gas supplementing tube 7 is connected with a gas supply hose 20, the end of the gas supplementing tube 7 is in a conical structure, so as to be connected with the gas supply hose 20 conveniently, and a bypass valve 21 is arranged in the gas supply hose. First and second gas mouths are arranged at the end of the handle 1, and the first and second gas mouths are communicated with the first and second gas channels 3 and 4 respectively. A three-way joint 22 is connected with the second gas mouth, and the bypass valve 21 is connected with the three-way joint 22.

[0076] A mounting base 23 is installed on the mixing pipe 2, near the flame-emitting end 6. An L-shaped drive rod 27 is rotatably connected to the mounting base 23. A feeding insertion hole 28 is provided on the mounting base 23. A buffer sleeve 29 is provided at one end of the drive rod 27, and a pull rope 30 is connected to the other end of the drive rod 27. A preload spring 31 is connected between the drive rod 27 and the mounting base 23. A clearance groove 32 is provided on the mounting base 23, and one end of the drive rod 27 is located in the clearance groove 32. A sleeve hole is provided on the drive rod 27, and the buffer sleeve 29 is installed in the sleeve hole. A welding rod 26 is inserted into the feeding insertion hole 28, and the welding rod 26 and the buffer sleeve 29 are fitted together. The pull rope 30 is connected to a pull ring 33, which is located at the handle 1. A support 34 is provided on the handle 1, and a through hole 35 is provided on the support 34, through which the pull rope 30 passes.

[0077] During the welding process, the welding rod 26 is first inserted into the feed port 28. Then, holding the handle 1, the pull ring 33 is slipped onto the finger, the flame end 6 is ignited, and the flame is aimed at the welding position. The finger pulls the pull rope 30 back and forth, thus pushing the welding rod 26 forward. After the welding rod 26 melts, it is welded to the welding point. This structural design allows for welding and pushing the welding rod 26 with one hand, simplifying the welding operation. Especially when welding in confined spaces, it avoids interference that can occur when holding the welding rod 26.

[0078] A welding method using a backfire-resistant quartz welding torch involves first inserting the welding rod 26 into the feed port 28. Then, holding the handle 1, the pull ring 33 is looped around the finger. The flame tip 6 is ignited, and the flame is aimed at the welding position. The finger pulls the pull cord 30 back and forth, thus pushing the welding rod 26 forward. After the welding rod 26 melts, it is welded to the welding point. Pulling the pull ring 33 causes the pull cord 30 to rotate the drive rod 27, which in turn causes the buffer sleeve 29 on the drive rod 27 to clamp the welding rod 26, thus pushing the welding rod 26 forward. When the pull ring 33 is released, the drive rod 27 returns to its original position under the action of the pre-tension spring 31. Continuously pulling the pull ring 33 achieves the feeding of the welding rod 26.

[0079] When the quartz welding torch is used in a semi-enclosed area, during the welding process, hydrogen and oxygen are introduced into the first gas channel 3 and the second gas channel 4, respectively. The hydrogen and oxygen are mixed in the mixing chamber 5, and the mixed gas is transported to the flame end 6 through the mixing pipe 2. The mixed gas ejected from the flame end 6 burns, heating the welding area. Oxygen is introduced into the gas supply pipe 7 and ejected from the other end of the gas supply pipe 7 towards the flame position to provide combustion support. This keeps the pressure at the outlet of the flame end 6 of the quartz welding torch basically constant, thereby ensuring that the hydrogen can be smoothly discharged and burned, preventing the risk of backfire and torch explosion.

[0080] Example 8: A backfire-resistant quartz welding torch (see...) Figure 8), comprising a handle 1 and a mixing tube 2 connected together, the handle 1 is made of metal, the mixing tube 2 is made of quartz, a first gas channel 3 and a second gas channel 4 are arranged in the handle 1, the first gas channel 3 is connected to hydrogen, and the second gas channel 4 is connected to oxygen. The handle 1 is provided with a mixing cavity 5 at one end, the first gas channel 3 and the second gas channel 4 are communicated with the mixing cavity 5, one end of the mixing tube 2 is communicated with the mixing cavity 5, the other end of the mixing tube 2 is a flame spouting end 6, the flame spouting end 6 of the mixing tube 2 is arranged obliquely, the mixing tube 2 is connected with a gas supplementing tube 7 side by side, the gas supplementing tube 7 is made of quartz, the gas supplementing tube 7 is welded with the mixing tube 2 through a connecting block 8, one end of the gas supplementing tube 7 is connected to oxygen, and the other end of the gas supplementing tube 7 is arranged towards the flame spouting end 6.

[0081] Adjusting valves 9 are arranged in the first gas channel 3 and the second gas channel 4, the adjusting valves 9 are connected with adjusting knobs 10, and the adjusting knobs 10 are arranged outside the handle 1. The adjusting valve 9 comprises a left valve body 11, a right valve body 12 and a ball body 13, the ball body 13 is adapted to be sleeved between the left valve body 11 and the right valve body 12, a through hole 14 is arranged on the ball body 13, the ball body 13 is tightly connected with a rotating shaft 15, the rotating shaft 15 penetrates out of the handle 1, and the adjusting knob 10 is tightly connected with the rotating shaft 15. The adjusting valves 9 are used to adjust the flow of the first gas channel 3 and the second gas channel 4, so as to adjust the size of the flame. The adjusting knobs 10 are used to adjust the adjusting valves 9, and the operation is convenient.

[0082] A connecting nozzle 16 is arranged at the end of the handle 1 and communicated with the mixing cavity 5, a connecting sleeve 17 is sleeved on the mixing tube 2, a convex ring 18 is arranged at the end of the mixing tube 2, the end surface of the convex ring 18 is abutted on the end surface of the connecting nozzle 16, and the connecting sleeve 17 is connected between the mixing tube 2 and the connecting nozzle 16. A stepped hole is arranged in the connecting sleeve 17, the transition surface of the stepped hole is abutted and positioned with the convex ring 18, and the connecting sleeve 17 is threadedly connected with the outer wall of the connecting nozzle 16. An end cover 19 is tightly connected with the end of the handle 1, and the mixing cavity 5 is arranged between the end cover 19 and the end of the handle 1. The connecting nozzle 16 is arranged on the connecting sleeve 17.

[0083] Spiral turbulence pieces 36 are arranged in the connecting nozzle 16. In the process that the mixed gas flows through the spiral turbulence pieces 36, the turbulence effect is generated, the hydrogen and the oxygen are uniformly mixed, and thus the combustion effect of the mixed gas at the flame spouting end 6 is improved.

[0084] The gas supplementing tube 7 is connected with a gas conveying hose 20, the end of the gas supplementing tube 7 is in a conical structure, which is convenient for being connected with the gas conveying hose 20, and a bypass valve 21 is connected with the gas conveying hose. First and second gas nozzles are arranged at the end of the handle 1, and the first and second gas nozzles are respectively communicated with the first and second gas channels 3 and 4. A three-way joint 22 is connected with the second gas nozzle, and the bypass valve 21 is connected with the three-way joint 22.

[0085] The mounting seat 23 is arranged on the mixed gas pipe 2, and the mounting seat 23 is arranged close to the flame spouting end 6. The L-shaped driving connecting rod 27 is rotatably connected to the mounting seat 23. The feeding insertion hole 28 is arranged on the mounting seat 23. The buffer sleeve 29 is arranged on one end of the driving connecting rod 27. The pulling rope 30 is connected to the other end of the driving connecting rod 27. The pre-tightening spring 31 is connected between the driving connecting rod 27 and the mounting seat 23. The avoiding slot 32 is arranged on the mounting seat 23. One end of the driving connecting rod 27 is arranged at the avoiding slot 32. The sleeve hole is arranged on the driving connecting rod 27. The buffer sleeve 29 is arranged in the sleeve hole. The welding rod 26 is inserted and welded in the feeding insertion hole 28. The welding rod 26 is sleeved with the buffer sleeve 29. The pulling rope 30 is connected with the pull ring 33. The pull ring 33 is arranged at the handle 1. The support 34 is arranged on the handle 1. The through hole 35 is arranged on the support 34. The pulling rope 30 passes through the through hole 35.

[0086] During the welding process, the welding rod 26 is inserted into the feeding insertion hole 28. Then, the handle 1 is held by hand. The pull ring 33 is sleeved on the finger. The flame spouting end 6 is ignited. The flame is aimed at the welding position. The pulling rope 30 is pulled back and forth by the finger. Thus, the welding rod 26 is pushed forward. After the welding rod 26 is melted, the welding rod 26 is welded to the welding position. Through the structure, the welding and the pushing operation of the welding rod 26 can be realized by one hand. The welding operation is simplified. Especially during the welding in some narrow space, the interference phenomenon of the hand-held welding rod 26 is avoided.

[0087] A welding method is provided. The welding rod 26 is inserted into the feeding insertion hole 28. Then, the handle 1 is held by hand. The pull ring 33 is sleeved on the finger. The flame spouting end 6 is ignited. The flame is aimed at the welding position. The pulling rope 30 is pulled back and forth by the finger. Thus, the welding rod 26 is pushed forward. After the welding rod 26 is melted, the welding rod 26 is welded to the welding position. The pulling rope 30 is pulled by the finger. Thus, the driving connecting rod 27 is rotated. The buffer sleeve 29 on the driving connecting rod 27 clamps the welding rod 26. Thus, the welding rod 26 is pushed to move. When the pull ring 33 is released, the driving connecting rod 27 is reset under the action of the pre-tightening spring 31. The welding rod 26 is continuously conveyed by continuously pulling the pull ring 33.

[0088] When the quartz welding torch is used in the semi-closed area, during the welding process, the first gas channel 3 and the second gas channel 4 respectively input hydrogen and oxygen. The hydrogen and the oxygen are mixed in the mixed gas chamber 5. The mixed gas is delivered to the flame spouting end 6 through the mixed gas pipe 2. The mixed gas burned by the flame spouting end 6 is heated to the welding position. The oxygen is input from the air supplement pipe 7. The oxygen is sprayed from the other end of the air supplement pipe 7 towards the flame spouting position. The oxygen provides combustion support. The pressure of the outlet of the flame spouting end 6 of the quartz welding torch can be kept basically constant. Thus, the hydrogen can be smoothly discharged and burned. The risk of backfire and explosion of the quartz welding torch is prevented.

[0089] Example 9: A backfire-proof quartz welding torch (see Figure 9), comprising a handle 1 and a mixing tube 2 connected together, the handle 1 is made of metal, the mixing tube 2 is made of quartz, the handle 1 is provided with a first gas channel 3 and a second gas channel 4, the first gas channel 3 is connected to hydrogen, and the second gas channel 4 is connected to oxygen. The handle 1 is provided with a mixing chamber 5 at one end, the first gas channel 3 and the second gas channel 4 are communicated with the mixing chamber 5, one end of the mixing tube 2 is communicated with the mixing chamber 5, the other end of the mixing tube 2 is a flame spouting end 6, the flame spouting end 6 of the mixing tube 2 is obliquely arranged, the mixing tube 2 is connected with a gas supplementing tube 7 side by side, the gas supplementing tube 7 is made of quartz, the gas supplementing tube 7 is welded with the mixing tube 2 through a connecting block 8, one end of the gas supplementing tube 7 is connected to oxygen, and the other end of the gas supplementing tube 7 is arranged towards the flame spouting end 6.

[0090] The first gas channel 3 and the second gas channel 4 are provided with adjusting valves 9, the adjusting valves 9 are connected with adjusting knobs 10, and the adjusting knobs 10 are arranged outside the handle 1. The adjusting valve 9 comprises a left valve body 11, a right valve body 12 and a ball body 13, the ball body 13 is adapted to be sleeved between the left valve body 11 and the right valve body 12, a through-flow hole 14 is arranged on the ball body 13, the ball body 13 is tightly connected with a rotating shaft 15, the rotating shaft 15 penetrates out of the handle 1, and the adjusting knob 10 is tightly connected with the rotating shaft 15. The adjusting valves 9 are used for adjusting the flow of the first gas channel 3 and the second gas channel 4, so as to adjust the size of the flame. The adjusting knobs 10 are used for adjusting the adjusting valves 9, and the operation is convenient.

[0091] A connecting nozzle 16 is arranged at the end of the handle 1 and communicated with the mixing chamber 5, a connecting sleeve 17 is sleeved on the mixing tube 2, a convex ring 18 is arranged at the end of the mixing tube 2, the end surface of the convex ring 18 is abutted on the end surface of the connecting nozzle 16, and the connecting sleeve 17 is connected between the mixing tube 2 and the connecting nozzle 16. A stepped hole is arranged in the connecting sleeve 17, the transition surface of the stepped hole is abutted and positioned with the convex ring 18, and the connecting sleeve 17 is threadedly connected with the outer wall of the connecting nozzle 16. An end cover 19 is tightly connected with the end of the handle 1, and the mixing chamber 5 is arranged between the end cover 19 and the end of the handle 1. The connecting nozzle 16 is arranged on the connecting sleeve 17.

[0092] A turbulent flow chamber 37 is arranged on the mixing tube 2, a turbulent flow cylinder 38 is arranged on the mixing tube 2, the turbulent flow chamber 37 is arranged in the turbulent flow cylinder 38, a plurality of inclined baffle plates 39 are arranged in the turbulent flow chamber 37, a plurality of air holes are densely arranged on the baffle plates 39, the lower end of the baffle plates 39 is communicated with the inner wall of the turbulent flow chamber 37, a through-flow gap 40 is arranged between the upper end of the baffle plates 39 and the inner wall of the turbulent flow chamber 37, and the inclination directions of adjacent two baffle plates 39 are opposite. The mixed gas passes through the turbulent flow chamber 37, the baffle plates 39 block the mixed gas flow, the turbulent flow effect is generated in the turbulent flow chamber 37, and the mixing effect of hydrogen and oxygen is increased.

[0093] The air supplement pipe 7 is connected with the air feeding hose 20, and the end of the air supplement pipe 7 is in a conical structure, which is convenient for connecting with the air feeding hose 20. The air feeding hose is connected with the bypass valve 21. The first air nozzle and the second air nozzle are arranged at the end of the handle 1, and the first air nozzle and the second air nozzle are respectively connected with the first air channel 3 and the second air channel 4. The three-way joint 22 is connected with the second air nozzle, and the bypass valve 21 is connected with the three-way joint 22.

[0094] The mounting seat 23 is arranged on the air mixing pipe 2, and the mounting seat 23 is arranged close to the flame spraying end 6. The L-shaped driving connecting rod 27 is rotatably connected with the mounting seat 23. The feeding insertion hole 28 is arranged on the mounting seat 23. The buffer sleeve 29 is arranged at one end of the driving connecting rod 27. The pulling rope 30 is connected with the other end of the driving connecting rod 27. The pre-tightening spring 31 is connected between the driving connecting rod 27 and the mounting seat 23. The avoiding groove 32 is arranged on the mounting seat 23, and one end of the driving connecting rod 27 is arranged at the avoiding groove 32. The sleeve hole is arranged on the driving connecting rod 27, and the buffer sleeve 29 is arranged in the sleeve hole. The welding rod 26 is inserted and welded in the feeding insertion hole 28, and the welding rod 26 is sleeved with the buffer sleeve 29. The pulling ring 33 is connected with the pulling rope 30, and the pulling ring 33 is arranged on the handle 1. The support 34 is arranged on the handle 1. The through hole 35 is arranged on the support 34, and the pulling rope 30 passes through the through hole 35.

[0095] During the welding process, the welding rod 26 is first inserted into the feeding insertion hole 28, and then the handle 1 is held by hand. The pulling ring 33 is sleeved on the finger. The flame spraying end 6 is ignited, and the flame is aimed at the welding position. The finger pulls the pulling rope 30 to move back and forth, so as to push the welding rod 26 forward. After the welding rod 26 is melted, it is welded to the welding position. Through the structure, the welding and pushing operation of the welding rod 26 can be realized by one hand, and the welding operation is simplified. Especially when welding in some small space, the interference phenomenon of holding the welding rod 26 by hand is avoided.

[0096] A welding method is provided. The welding rod 26 is first inserted into the feeding insertion hole 28, and then the handle 1 is held by hand. The pulling ring 33 is sleeved on the finger. The flame spraying end 6 is ignited, and the flame is aimed at the welding position. The finger pulls the pulling rope 30 to move back and forth, so as to push the welding rod 26 forward. After the welding rod 26 is melted, it is welded to the welding position. The finger pulls the pulling ring 33, so as to pull the pulling rope 30 to rotate the driving connecting rod 27. The buffer sleeve 29 on the driving connecting rod 27 clamps the welding rod 26, so as to push the welding rod 26 to move. When the pulling ring 33 is released, the driving connecting rod 27 is reset under the action of the pre-tightening spring 31. The welding rod 26 is continuously pulled, so as to realize the conveying of the welding rod 26.

[0097] When the quartz soldering gun is used in a semi-closed area, during the soldering process, the first gas passage 3 and the second gas passage 4 are respectively connected to hydrogen and oxygen, the hydrogen and the oxygen are mixed in the gas mixing chamber 5, the mixed gas is delivered to the flame spraying end 6 through the gas mixing pipe 2, the mixed gas sprayed from the flame spraying end 6 is combusted to heat the soldering position. The oxygen is input into the gas supplement pipe 7 and sprayed from the other end of the gas supplement pipe 7 towards the flame spraying position to provide combustion-supporting, the pressure at the outlet of the flame spraying end 6 of the quartz soldering gun can be kept substantially constant, so that the hydrogen can be smoothly discharged and combusted, and the risk of backfire and gun explosion is prevented.

[0098] The above-described embodiments are only the preferred solutions of the present application, and do not limit the present application in any form, and other variants and modifications can be made without departing from the technical solutions recited in the claims.

Claims

1. A backfire-resistant quartz welding torch, characterized in that, It includes a handle and a mixing pipe connected together. The handle is provided with a first air passage and a second air passage. A mixing chamber is provided at one end of the handle. Both the first air passage and the second air passage are connected to the mixing chamber. One end of the mixing pipe is connected to the mixing chamber. The other end of the mixing pipe is the flame end. The mixing pipe is connected to a supplementary air pipe in parallel. One end of the supplementary air pipe is used to input oxygen. The other end of the supplementary air pipe is set towards the flame end.

2. The anti-backfire quartz welding torch according to claim 1, characterized in that, Both the first and second air passages are equipped with regulating valves, which are connected to regulating knobs located outside the grip.

3. The anti-backfire quartz welding torch according to claim 1, characterized in that, The handle end is provided with a connecting nozzle that communicates with the mixing chamber. A connecting sleeve is fitted on the mixing pipe. A convex ring is provided at the end of the mixing pipe. The end face of the convex ring rests on the end face of the connecting nozzle. The connecting sleeve connects the mixing pipe and the connecting nozzle.

4. The anti-backfire quartz welding torch according to claim 3, characterized in that, A spiral turbulence vane is installed inside the connecting nozzle.

5. The anti-backfire quartz welding torch according to claim 1, characterized in that, A turbulent flow chamber is set on the mixing pipe, and several inclined baffles are installed in the turbulent flow chamber. The baffles are densely covered with fine ventilation holes. The lower end of the baffle is connected to the inner wall of the turbulent flow chamber, and a flow passage gap is set between the upper end of the baffle and the inner wall of the turbulent flow chamber. The inclination directions of two adjacent baffles are opposite.

6. The anti-backfire quartz welding torch according to claim 1, characterized in that, A mounting base is installed on the gas mixing pipe, and a universal ball is installed on the mounting base. The universal ball is provided with a positioning hole, which is adapted to insert welding rods.

7. The anti-backfire quartz welding torch according to claim 1, characterized in that, A mounting base is installed on the mixing pipe, and a drive linkage is rotatably connected to the mounting base. A feeding hole is provided on the mounting base. A buffer sleeve is provided at one end of the drive linkage, and a pull rope is connected to the other end of the drive linkage. A pre-tension spring is connected between the drive linkage and the mounting base. The pull rope is connected to a pull ring, which is placed at the handle. A welding rod is inserted into the feeding hole, and the welding rod is fitted with the buffer sleeve.

8. A backfire-resistant quartz welding torch according to any one of claims 1 to 7, characterized in that, The flame end of the mixing pipe is set at an angle.

9. A backfire-resistant quartz welding torch according to any one of claims 1 to 7, characterized in that, The air supply hose is connected to the air delivery hose, and the air delivery hose is connected to the bypass valve.

10. A welding method, characterized in that, When welding with the anti-backfire quartz welding torch as described in claim 7, first insert the welding rod into the feed socket, then hold the handle, put the pull ring on your finger, ignite the flame end, aim the flame at the welding position, and pull the pull rope back and forth with your finger to push the welding rod forward. After the welding rod melts, it is welded to the welding position.

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