CN219571918U - Air tap and air supply mechanism - Google Patents

Abstract

An air tap and an air supply mechanism are provided. The air joint nozzle is provided with a first cylinder part, a second cylinder part, a step part, a base part, a revolving body and a central through hole; the first cylinder part and the second cylinder part are arranged along the axial direction of the gas joint nozzle and are connected together through the step part; the base station part is positioned in the first cylinder part and is fixed on the step part, and the base station part is provided with surrounding through holes; the revolving body protrudes away from the second cylinder part along the axial direction of the gas joint, the central through hole penetrates through the revolving body and the base part along the axial direction of the gas joint, the central through hole communicates the second cylinder part with the first cylinder part, and on the axial section of the central axis of the over-central through hole and the central axis of the surrounding through hole, the projection range of the surrounding through hole along the axial direction of the gas joint is intersected with a generatrix of the revolving body in the axial direction of the gas joint; the first cylinder part is used for being combined with one end of an air conveying pipe of the welding gun; the second barrel portion is adapted to be coupled to one end of a conduit assembly of a gas supply mechanism of a welding gun. The air supply mechanism comprises the air receiving nozzle and the pipeline assembly.

Description

Air tap and air supply mechanism

Technical Field

The present disclosure relates to the field of welding, and more particularly to an air tap and air supply mechanism.

Background

Semiconductor materials require quartz devices as carriers for loading crucibles and increasing vacuum conditions in crystal growth (e.g. gallium arsenide, indium phosphide, germanium, indium antimonide, etc.). Currently in common use, quartz devices include quartz tubes and quartz capsules (see fig. 1 and 2). In order to form a vacuum state in the quartz tube carrier, vacuum equipment such as a molecular pump is adopted to pump air in the quartz tube and achieve a vacuum environment required by crystal growth, and then oxyhydrogen flame is used for heating to enable the quartz tube and the quartz sealing bubble to be connected together, so that the vacuum state in the quartz tube carrier is sealed.

In order to improve the welding efficiency, chinese patent application publication number CN207031258U issued in 2/23 of 2018 discloses an oxyhydrogen flame nozzle for sealing a circular quartz tube, which is a fan-shaped welding gun in nature, an oxygen guide tube is a bent tube, a hydrogen guide tube is a straight tube, a oxyhydrogen mixing tube is arc-shaped, the oxyhydrogen mixing tube is communicated with the hydrogen guide tube and the hydrogen guide tube, and 10-15 flame nozzles are arranged on one side of the oxyhydrogen mixing tube, and the welding gun cannot seal the quartz tube at the same time on the whole circumference of the quartz tube.

Chinese patent application publication No. CN112408761a published 26, 2, 2021 discloses a welding device, wherein a welding gun includes a welding ring and a plurality of welding gun nozzles (collectively referred to as nozzles) disposed inside the welding ring, the plurality of welding gun nozzles are all communicated with the welding ring, a welding area is defined between the plurality of welding gun nozzles, an air supply assembly is used for supplying air to the welding ring, and the air supply assembly includes a gas inlet and a combustion-supporting gas inlet; the gas supply assembly and the welding gun are rotatable about a central axis of the weld ring. Based on the arrangement of the welding ring, the welding gun can seal the quartz tube on the whole circumference of the quartz tube at the same time, and the first air inlet pipe and the second air inlet pipe supply components of combustion gas and are mixed in the air inlet main pipe.

Based on the technology disclosed in the above two patent documents, during the tube sealing process of the quartz tube, the flame of each nozzle applies a hot air flow to the quartz tube at a certain speed and pressure so that the welding position between the quartz tube and the quartz envelope is heated and melted, and the quartz tube at the welding position reflects the hot air flowing to the oxyhydrogen gas mixing tube/welding ring and each nozzle, meanwhile, as the quartz tube conducts the received heat again in a heat radiation manner due to the good heat conducting property of the material of the quartz tube, the heat radiation also has the part radiating to the oxyhydrogen gas mixing tube/welding ring and each nozzle, so that the oxyhydrogen gas mixing tube/welding ring and the heat from the reflected hot air flow and the radiated heat received by each nozzle can cause overheating of the oxyhydrogen gas mixing tube/welding ring and overheating of each nozzle after the welding time (the welding seal tube for a single quartz tube or the welding gun continuously works to the welding seal for a large batch of quartz tubes). If the nozzles are overheated, the nozzles will expand and deform, so that the flow rate of the combustion gas in the nozzles is reduced, the flame at the nozzles will be tempered and even explode in the nozzles, so that the nozzles burst, and similarly, if the oxyhydrogen gas mixing tube/welding ring is overheated, the flow channel of the mixed combustion gas in the oxyhydrogen gas mixing tube/welding ring will also expand and deform and narrow, so that the flow rate of the combustion gas in the flow channel is reduced, and further, the flow rate of the combustion gas at the nozzles is reduced, and the tempering or bursting will affect the working stability and service life of the welding gun, and on the other hand, the welding quality and the welding efficiency of the welding part between the single quartz tube and the quartz sealing bulb and the welding efficiency of the batch quartz tubes.

In addition, based on the technology disclosed in the above two patent documents, hydrogen and oxygen are introduced into the oxyhydrogen gas mixing pipe/the air inlet main pipe together, and only simply mixed together, which can lead to insufficient combustion of oxyhydrogen flame, which is unfavorable for guaranteeing the temperature of flame, and further is unfavorable for improving the welding quality and the welding efficiency of quartz tube welding sealing pipe.

Disclosure of Invention

In view of the problems existing in the background art, an object of the present disclosure is to provide an air tap and an air supply mechanism, which can improve the sufficiency of combustion when forming flame, be beneficial to ensuring the temperature of flame, and further be beneficial to improving the welding quality and the welding efficiency of the quartz tube welding tube sealing.

Thus, the air receiving nozzle is provided with a first cylinder part, a second cylinder part, a step part, a base part, a revolving body and a central through hole; the first cylinder part is provided with a first inner cavity; the second cylinder part is provided with a second inner cavity; the first cylinder part and the second cylinder part are arranged along the axial direction of the gas joint nozzle and are connected together through the step part; the base station part is positioned in the second inner cavity of the first cylinder part, the base station part is fixed on the step part and shields the second inner cavity of the second cylinder part, the base station part is provided with a peripheral through hole surrounding the revolving body, and the peripheral through hole communicates the second inner cavity of the second cylinder part with the first inner cavity of the first cylinder part; the revolving body is positioned in the second inner cavity, the revolving body protrudes away from the second cylinder part along the axial direction of the air connection nozzle, the central through hole penetrates through the revolving body and the base part along the axial direction of the air connection nozzle, the central through hole communicates the second inner cavity of the second cylinder part with the first inner cavity of the first cylinder part, and on the axial section of the central axis of the over-central through hole and the central axis of the peripheral through hole, the projection range of the peripheral through hole along the axial direction of the air connection nozzle is intersected with the generatrix of the revolving body along the axial direction of the air connection nozzle; the first cylinder part is used for being combined with one end of an air conveying pipe of the welding gun; the second tube part is used for being combined with one end of a pipeline component of a gas supply mechanism of the welding gun so that the pipeline component supplies components of combustion gas to the central through hole and the peripheral through holes respectively, the components of the combustion gas entering through the peripheral through holes are deflected onto the inner wall of the first tube part by interference of a bus of the revolving body, and are further refracted by the inner wall of the first tube part to be mixed with the components of the combustion gas passing through the central through holes, so that the welding tube sealing device is at least suitable for quartz tube welding.

The air supply mechanism comprises the air receiving nozzle and a pipeline assembly; one end of the pipeline component is used for being combined with the second cylinder part, so that the pipeline component respectively supplies components of combustion gas into the central through hole and the peripheral through holes, the components of the combustion gas entering through the peripheral through holes are deflected onto the inner wall of the first cylinder part by interference of a bus of the revolving body, and are refracted by the inner wall of the first cylinder part to be mixed with the components of the combustion gas passing through the central through holes, and the components of the mixed combustion gas reach corresponding nozzles through the gas conveying pipe, the third port and the second flow passage of the ring body to be at least suitable for quartz tube welding sealing pipes.

The beneficial effects of the present disclosure are as follows: compared with a simple three-way pipe form that hydrogen and oxygen adopted by CN207031258U in the background art are led into a oxyhydrogen gas mixing pipe together with oxygen, a first air inlet pipe and a second air inlet pipe adopted by CN112408761A supply components of combustion gas and are mixed in an air inlet main pipe, in the air joint nozzle and air supply mechanism of the present disclosure, through the matching of a revolving body of the air joint nozzle, surrounding through holes, a first barrel part and a central through hole, the components of the combustion gas entering through the surrounding through holes and the components of the combustion gas passing through the central through hole are fully mixed, the combustion sufficiency when flame is formed is improved, the temperature of the flame is guaranteed, and further the welding quality and the welding efficiency of a quartz tube welding seal pipe are improved.

Drawings

FIG. 1 is a schematic view of a quartz tube prior to welding the tube seal.

Fig. 2 is a schematic view of the quartz tube after welding the tube seal.

Fig. 3 is a perspective view of a welding system according to the present disclosure.

Fig. 4 is a perspective view of a tube welder of the welding system of fig. 3.

Fig. 5 is another perspective view of the tube welder of fig. 4 with the panels of the cabinet removed.

Fig. 6 is a perspective view from an angle of the pipe welder of fig. 4.

Fig. 7 is a partially exploded view of the pipe welder of fig. 6.

FIG. 8 is a perspective view of a gas nipple of a gas supply mechanism of the welding pipe machine of the welding system of FIG. 3.

FIG. 9 is another perspective view of the nozzle of FIG. 8.

Fig. 10 is a top view of the air nozzle of fig. 9.

Fig. 11 is a cross-sectional view taken along line A-A of fig. 10.

Fig. 12 is a bottom view of the nozzle of fig. 8.

Fig. 13 is a perspective view of the combination of the base portion and the rotator of the air tap of fig. 9.

Fig. 14 is another angular perspective view of fig. 13.

Fig. 15 is a bottom view of fig. 14.

Fig. 16 is a cross-sectional view taken along line B-B of fig. 15.

Fig. 17 is a cross-sectional view of fig. 15 taken along line C-C.

FIG. 18 is a schematic illustration of the connection of the nozzle to other components of the air supply mechanism.

Fig. 19 is a modification of fig. 13.

Wherein reference numerals are as follows:

1000 welding system 621a central passage

D1 left-right direction 621b circumference channel

D2 up-down direction 622 first air pipe

D3 anterior-posterior direction 623 second trachea

First valve of 100 vacuum machine 624

100a chuck 625 second valve

200 support frame 7 support

200a first vertical plate of fixture 71

300 second vertical plate of pipe welder 72

300a welding gun 73 upper side column

Lower side column of 1 ring 74

11 first flow path 75 connecting column

12 first port 76 first plate

13 second port P swing passage

14 second runner 8 rocking mechanism

15 third port 81 telescopic cylinder

16 inner circumferential surface 811 cylinder

17 outer peripheral surface 812 piston

18 first shaft end face 82 connecting block

19 second shaft end face 83 base

2 nozzle 831 arc plate

3 first tube 832 first block

4 second tube 833 second block

5 air delivery pipe 834 accommodating space

6 air feed mechanism 300b supporting table

61 air nozzle 300c left-right moving mechanism

611 first barrel 300c1 drive unit

611a first lumen 300c2 guide rail

612 second barrel 300c3 roller

612a second lumen 300d up-down movement mechanism

613 step 300d1 driver

614 base station 300d2 connecting rod

614a surrounding through hole 300d3 guide rod

615 revolving body 300e front-back moving mechanism

615a bus 300e1 support plate

615a1 first arc 300e2 slide rail

615a2 second arc 300e3 driving machine

615b top surface 300f cabinet

616 central through hole 300g PLC

617 horizontal bar 300h touch screen

2000 quartz tube of 62 pipeline assembly

621 connecting tube 3000 Dan Yingfeng bubble

Detailed Description

The drawings illustrate embodiments of the present disclosure, and it is to be understood that the disclosed embodiments are merely examples of the disclosure that may be embodied in various forms and that, therefore, specific details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously practice the disclosure.

Referring to fig. 3 in combination with fig. 1 and 2, a welding system 1000 includes a vacuum station 100, a support stand 200, and a pipe welder 300. The vacuum machine 100 is provided with a chuck 100a, and the chuck 100a is used for sealing and clamping one end of the quartz tube 2000 provided with the quartz envelope 3000 and vacuumizing.

The support frame 200 is provided with an openable and closable jig 200a for clamping the closed other end of the quartz tube 2000 when closed.

The tube welder 300 is arranged between the vacuum machine 100 and the support frame 200, and the tube welder 300 is used for melting the quartz tube 2000 from outside under vacuum negative pressure in the quartz tube 2000 by flame, so that the quartz tube 2000 is contracted at a welding sealing part to form a whole circle of sealing with the quartz sealing bubble 3000 (namely, the quartz tube is welded and sealed). It is noted here that the type of flame is of course that the temperature reached by the combustion of the flame reaches the requirements of welding the envelope, and the flame may be oxyhydrogen flame, oxy-acetylene flame, etc.

Referring to fig. 4 to 7, the pipe welder 300 includes a welding gun 300a. Gun 300a includes ring 1 and a plurality of nozzles 2. The ring body 1 is a 360-degree circumferential closed ring, and the ring body 1 has a first flow passage 11, a first port 12, a second port 13, a second flow passage 14, a third port 15, and an inner circumferential surface 16. The first flow channel 11 is located inside the ring body 1, the first port 12 and the second port 13 are arranged on the outer surface of the ring body 1, the first port 12 and the second port 13 are communicated with the first flow channel 11, and the first port 12 and the second port 13 are used for being communicated with an external cooling medium source so that the cooling medium provided by the external cooling medium source can flow along a cooling medium flow path formed by the first port 12, the second port 13 and the first flow channel 11 to control the temperature of the ring body 1. The second flow channel 14 is located inside the ring body 1, the third port 15 is disposed on the outer surface of the ring body 1, the third port 15 is communicated with the second flow channel 14, and the third port 15 is used for communicating with an external combustion gas source so that combustion gas provided by the external combustion gas source can be introduced into the second flow channel 14 through the third port 15. The plurality of nozzles 2 are provided on the inner peripheral surface 16 of the ring body 1 and spaced apart from each other in the circumferential direction, the plurality of nozzles 2 communicate with the second flow passage 14, and the plurality of nozzles 2 are for the combustion gas flowing in through the third port 15 and the second flow passage 14 to be ejected radially inward from the respective nozzles 2 to be ignited to form flames for the aforementioned quartz tube welding envelope.

In the welding gun 300a of the present disclosure, the plurality of nozzles 2 are disposed on the inner circumferential surface 16 of the ring body 1 and are spaced apart from each other in the circumferential direction, and the plurality of nozzles 2 form flames around the welding portion between the quartz tube 2000 and the quartz envelope 3000 to weld the whole circle of the welding portion, which is shorter than the welding time and the welding efficiency of the fan-shaped welding gun of the background art, so that the vacuum environment in the quartz tube after the quartz tube is welded and sealed can be ensured, and the vacuum environment requirement for crystal growth using the quartz tube can be further satisfied.

When the cooling medium flow path formed by the first port 12, the second port 13 and the first flow channel 11 is not provided in the ring body 1, during the quartz tube sealing process, the flame of each nozzle 2 applies a hot air flow to the quartz tube 2000 at a certain speed and pressure so that the welding position between the quartz tube 2000 and the quartz envelope 3000 is heated and melted, the quartz tube 2000 at the welding position reflects the hot air flow to the ring body 1 and each nozzle 2, meanwhile, since the quartz tube 2000 conducts the received heat again in a heat radiation manner due to the good heat conducting property of the material of the quartz tube, the heat radiation also has the part radiating to the ring body 1 and each nozzle 2, thus, the heat from the reflected hot air flow and the radiated heat received by the ring body 1 and each nozzle 2 can cause overheating of the ring body 1 and overheating after the welding time (the welding seal 300a is continuously operated for a single quartz tube 2000 to continuously weld the quartz tube in large batch), if the nozzles 2 are overheated, the nozzles 2 will expand and deform, so that the flow rate of the combustion gas in the nozzles 2 will decrease, and the flame at the nozzles 2 will temper or even explode in the nozzles 2, resulting in bursting of the nozzles 2, and if the ring body 1 is overheated, the second flow channel 14 will expand and deform to be narrowed, so that the flow rate of the combustion gas in the second flow channel 14 will decrease, and further the flow rate of the combustion gas at the nozzles 2 will decrease, resulting in the aforesaid tempering or even bursting, which will affect the working stability and service life of the welding gun 300a on one hand, and the welding quality of the welding portion between the single quartz tube 2000 and the quartz envelope 3000 on the other hand, welding efficiency, and welding efficiency of the batch quartz tube 2000. In the welding gun 300a of the present disclosure, since the first port 12 and the second port 13 are used to communicate with an external cooling medium source so that the cooling medium provided by the external cooling medium source can flow along the cooling medium flow path formed by the first port 12, the second port 13 and the first flow channel 11, the ring body 1 exchanges heat with the cooling medium to cool without overheating, and similarly, each nozzle 2 is cooled due to heat conduction with the ring body 1 to avoid the risk of tempering and even bursting as described above. In addition, since the cooling medium can flow through the ring body 1 along the cooling medium flow path formed by the first port 12, the second port 13 and the first flow passage 11, the thermal expansion deformation of the ring body 1 and each nozzle 2 is controlled, and thus the flow path of the combustion gas (i.e., the path formed by the third port 15, the second flow passage 14 and each nozzle 2) is controlled in structural stability, the combustion gas ejected from each nozzle 2 and the stability of the flame formed are controlled, so that the flame at the plurality of nozzles 2 can be stably and uniformly welded around the welding portion between the quartz tube 2000 and the quartz capsule 3000 in full circle, the welding quality is stable and uniform at each position of the welding portion in full circle, the sealing effect of full circle is stable and uniform, the welding efficiency of the single quartz tube 2000 welding tube sealing and the welding efficiency of the batch quartz tube 2000 sealing tube are ensured, and the stability and consistency of the vacuum degree of the batch quartz tube 2000 after the welding tube sealing are also stably ensured.

The ring body 1 is a heat conduction ring body, which is beneficial to heat exchange between the ring body 1 and a cooling medium flowing through. For example, the heat conducting ring body is a metal ring body. Further, metal rings such as, but not limited to, copper rings.

As shown in fig. 5, the ring body 1 further has an outer peripheral surface 17, a first axial end surface 18, and a second axial end surface 19. The outer peripheral surface 17 and the inner peripheral surface 16 are located between the first shaft end surface 18 and the second shaft end surface 19 in the axial direction of the ring body 1 (the left-right direction D1 in fig. 1); the first port 12 is arranged on a first shaft end surface 18, and the second port 13 is arranged on a second shaft end surface 19; the third port 15 is provided on the outer peripheral surface 17. By arranging the first port 12, the second port 13 and the third port 15 on different surfaces of the ring body 1, the spatial limitation that the first port 12, the second port 13 and the third port 15 are arranged on the same surface of the ring body 1 is avoided, and the first pipe 3, the second pipe 4 and the gas delivery pipe 5, which are connected with the first port 12, the second port 13 and the third port 15 respectively, will form a structural connection which can be integrated together simply.

As shown in fig. 4 in combination with fig. 3, the inner circle surrounded by the plurality of nozzles 2 is sized to fit the outer diameter and radial spacing of the quartz tube 2000. For example, the radial positions of the plurality of nozzles 2 (i.e., the positions at which the radially inner ends of the nozzles 2 are located) are set to be spaced apart from the outer diameter of the quartz tube 2000 by 20 to 30mm in the radial direction. If the interval is smaller than 20mm, each nozzle 2 will be closer to the welding site between the quartz tube 2000 and the quartz envelope 3000, so that, on one hand, the aforementioned heat from the reflected hot air flow and the radiated heat will accumulate over the welding time, resulting in the ring body 1 overheating earlier, each nozzle 2 overheating earlier, and on the other hand, the aforementioned reflected hot air flow will be reciprocal to the air flow ejected from each nozzle 2, resulting in an increase in pressure at the outlet of each nozzle 2, and the ejection of the combustion gas at the outlet of each nozzle 2 will be hindered, the flow rate will be slowed down, and the tempering or explosion will likewise be caused, that is, both of these will aggravate the tempering or explosion. If the interval is more than 30mm, each nozzle 2 will be further away from the welded portion between the quartz tube 2000 and the quartz envelope 3000, and the welding efficiency of the quartz tube welded envelope will be lowered for both the single quartz tube 2000 and the batch of quartz tubes 2000.

As shown in fig. 3 to 5, the plurality of nozzles 2 are arranged at equal intervals along the circumferential direction, and the equal intervals are beneficial to uniformly distributing the heated and melted points of the welding part between the quartz tube 2000 and the quartz sealing bulb 3000 along the circumferential direction, so as to be beneficial to ensuring the uniformity of the quality of the whole circle welding between the quartz tube 2000 and the quartz sealing bulb 3000. Further, the number of the plurality of nozzles 2 is set as: for a 2 inch outside diameter quartz tube 2000, the number of the plurality of nozzles 2 is 20-22; for a 3 inch outside diameter quartz tube 2000, the number of multiple nozzles 2 is 24-28; for a 4 inch outside diameter quartz tube 2000, the number of multiple nozzles 2 is 28-32; for a 5 inch outside diameter quartz tube 2000, the number of multiple nozzles 2 is 32-36; for a 6 inch outside diameter quartz tube 2000, the number of multiple nozzles 2 is 36-40; the number of the plurality of nozzles 2 is 40 to 44 for the 8-inch outer diameter quartz tube 2000. With this arrangement, the welded parts of the whole circle between the quartz tube 2000 and the quartz envelope 3000 can be connected together more quickly in the circumferential direction, and thus the whole circle welding can be completed quickly, which is especially suitable for the rocking mechanism 8 described later, which makes the ring body 1 to rock back and forth at a small angle in the circumferential direction.

The outlets of the nozzles 2 are arranged to enable the flame size of the outgoing flame to be 1.2mm-3mm, so that the distance between the center of the flame and the outer diameter of the quartz tube 2000 can be kept appropriate, the flames of the circumferentially adjacent nozzles 2 are independent of each other, and the welding quality of the whole circle of welding seal tube between the quartz tube 2000 and the quartz seal bubble 3000 is improved.

Similarly, each nozzle 2 is a heat conducting nozzle, which facilitates heat conduction between each nozzle 2 and the ring body 1 and heat exchange via the cooling medium flowing through the inside of the ring body 1. For example, the thermally conductive nozzle is a metal nozzle. Further, metal nozzles such as, but not limited to, copper nozzles.

Referring to fig. 4, the welding gun 300a further includes a first tube 3, a second tube 4, and a gas delivery tube 5. One end of the first tube 3 is connected to the first port 12 and the other end of the first tube 3 is for connection to an external source of cooling medium. One end of the second tube 4 is connected to the second port 13 and the other end of the second tube 4 is for connection to an external source of cooling medium. One end of the gas delivery tube 5 is connected to the third port 15 and the other end of the gas delivery tube 5 is for an external combustion gas source. As shown in fig. 4, the first tube 3, the second tube 4 and the gas delivery tube 5 are substantially parallel and coplanar, thereby together forming the aforementioned structural connection that is simply integratable together. The first tube 3, the second tube 4 and the gas delivery tube 5 are all rigid heat conducting tubes, such as metal tubes, which are beneficial to heat exchange and also beneficial to maintaining the structural stability of the ring body 1. The cooling medium provided by the external cooling medium source enters the ring body 1 through the first pipe 3 and the first port 12, exchanges heat with the ring body 1 through the first flow channel 11, and then the heat-exchanged cooling medium is discharged through the second port 13 and the second pipe 4, and the discharged heat-exchanged cooling medium can be cooled (for example, heat is recovered) through retreating again, and then recycled as the cooling medium to be reused by the external cooling medium source.

Referring to fig. 4 and 5, the welding gun 300a further includes a gas supply mechanism 6, and the gas supply mechanism 6 is configured to mix components of the combustion gas and to mix the components of the combustion gas to the corresponding nozzle 2 via the gas delivery pipe 5, the third port 15, and the second flow passage 14 of the ring body 1.

As shown in fig. 4, 5 and 18, the air supply mechanism 6 includes an air receiving nozzle 61 and a duct assembly 62.

Specifically, as shown in fig. 8 to 18, the air receiving nozzle 61 has a first cylindrical portion 611, a second cylindrical portion 612, a stepped portion 613, a base portion 614, a rotator 615, and a center through hole 616. The first barrel portion 611 has a first inner cavity 611a; the second barrel portion 612 has a second interior cavity 612a; the first cylinder 611 and the second cylinder 612 are arranged along the axial direction of the air tap 61 and are connected together by a step 613; the base portion 614 is located in the second inner cavity 612a of the first cylinder portion 611, the base portion 614 is fixed to the step portion 613 and covers the second inner cavity 612a of the second cylinder portion 612, the base portion 614 has a peripheral through hole 614a surrounding the revolution body 615, and the peripheral through hole 614a communicates the second inner cavity 612a of the second cylinder portion 612 with the first inner cavity 611a of the first cylinder portion 611; the revolving body 615 is located in the second inner cavity 612a, the revolving body 615 protrudes away from the second cylinder portion 612 along the axial direction of the air nozzle 61, the central through hole 616 penetrates through the revolving body 615 and the base portion 614 along the axial direction of the air nozzle 61, and the central through hole 616 communicates the second inner cavity 612a of the second cylinder portion 612 with the first inner cavity 611a of the first cylinder portion 611; on the axial cross-section of the central axis of the over-center through hole 616 and the central axis of the peripheral through hole 614a, the projection range of the peripheral through hole 614a in the axial direction of the air nozzle 61 intersects with the generatrix 615a of the revolution body 615 in the axial direction of the air nozzle 61; the first cylindrical portion 611 is for being combined with one end of the gas delivery pipe 5 of the welding gun 300 a; the second cylinder portion 612 is used in combination with one end of the pipe assembly 62 of the gas supply mechanism 6 of the welding gun 300a so that the pipe assembly 62 supplies components of combustion gas to the central through hole 616 and the peripheral through hole 614a, respectively, components of combustion gas entering through the peripheral through hole 614a are redirected onto the inner wall of the first cylinder portion 611 by interference of the bus bar 615a of the revolution body 615, and are refracted by the inner wall of the first cylinder portion 611 to be mixed with components of combustion gas passing through the central through hole 616 for use in quartz tube welding envelope. Compared with a simple three-way pipe form that hydrogen adopted by CN207031258U in the background art and oxygen are introduced into a oxyhydrogen gas mixing pipe together, a first air inlet pipe and a second air inlet pipe adopted by CN112408761A supply components of combustion gas and are mixed in an air inlet main pipe, in the air receiving nozzle 61 disclosed by the invention, the components of the combustion gas entering through the peripheral through holes 614a and the components of the combustion gas passing through the central through holes 616 are fully mixed through the cooperation of the revolving body 615, the peripheral through holes 614a, the first barrel 611 and the central through holes 616, so that the combustion sufficiency when flame is formed is improved, the temperature of the flame is guaranteed, and the welding quality and the welding efficiency of the quartz pipe welding sealing pipe are improved.

The inner wall of the first cylinder 611 may be provided with an internal thread for screw-coupling with an external thread of the gas delivery tube 5 of the welding gun 300a, thereby achieving detachable coupling of the first cylinder 611 with the gas delivery tube 5 of the welding gun 300 a.

Likewise, the outer wall of the second barrel portion 612 may be provided with threads for threaded engagement with the internal threads of the conduit assembly 62, thereby effecting removable connection of the second barrel portion 612 to the conduit assembly 62.

The plurality of peripheral through holes 614a is provided, and the plurality of peripheral through holes 614a are arranged at equal intervals around the revolution body 615. As shown in fig. 13 and 14, the surrounding through holes 614a are four. When oxyhydrogen flame is employed, the surrounding through holes 614a are used for introducing hydrogen gas, and the center through hole 616 is used for introducing oxygen gas.

Referring to fig. 11 to 17, the peripheral through hole 614a has the same diameter as the central through hole 616 and is constant in the axial direction of the air nozzle 61. When oxyhydrogen flame is used, this same setting of the diameters of the peripheral through holes 614a and the central through hole 616 can make the determination of the flow rate (or mass) ratio of the hydrogen gas introduced through the peripheral through holes 614a and the oxygen gas through the central through hole 616 extremely simple, especially at the same flow rate, only the number of the peripheral through holes 614a needs to be set, preferably the peripheral through holes 614a are the same as the diameter of the central through hole 616 and constant in the axial direction of the gas nozzle 61 and the flow rate of the oxygen gas and the hydrogen gas is the same, and the peripheral through holes 614a are 4 or 5, so that the hydrogen is excessive when flame burns, and the excessive hydrogen can absorb heat as dilution gas, thereby moderately reducing the temperature when flame burns and moderately absorbing the reflected hot gas flow and the radiated heat, further avoiding the tempering and even explosion described above.

The first tubular portion 611, the second tubular portion 612, the stepped portion 613, the base portion 614, and the rotator 615 constitute an integrally formed single piece, thereby improving the structural strength of the air tap 61. The material of the nozzle 61 may be copper.

As shown in fig. 11 and 16 to 18, the generatrix 615a of the rotator 615 includes a first circular arc line 615a1, the first circular arc line 615a1 extends from the surface of the base portion 614 in the axial direction of the air nozzle 61, the first circular arc line 615a1 is concave toward the central axis of the central through hole 616, and the projection range of the peripheral through hole 614a in the axial direction of the air nozzle 61 intersects the first circular arc line 615a1 of the generatrix 615a of the rotator 615 in the axial direction of the air nozzle 61. Further, the bus bar 615a of the revolving body 615 further includes a second arc line 615a2, the second arc line 615a2 extends from the first arc line 615a1 along the axial direction of the air nozzle 61 away from the first arc line 615a1, the second arc line 615a2 protrudes outwards away from the central axis of the central through hole 616, and the first arc line 615a1 and the second arc line 615a2 form an S shape. The second circular arc line 615a2 is beneficial to guiding and converging the interference of the bus bar 615a of the revolving body 615 entering through the surrounding through hole 614a to be redirected to the inner wall of the first cylinder 611, so that the components of the combustion gas refracted by the inner wall of the first cylinder 611 are mixed with the components of the combustion gas sprayed out through the central through hole 616, thereby further improving the combustion sufficiency when flame is formed, further being beneficial to ensuring the temperature of the flame, and further being beneficial to improving the welding quality and the welding efficiency of the quartz tube welding tube sealing.

As shown in fig. 11, 16 and 17, the top surface 615b of the revolution body 615 in the axial direction is a plane, thereby ensuring that the flow rate at the outlet of the center through hole 616 coincides with the flow rate inside the center through hole 616.

Referring to fig. 19, nozzle 61 may further include a cross piece 617, with cross piece 617 disposed within central throughbore 616 at top surface 615b to divide central throughbore 616 into two portions at cross piece 617. By the division of the cross bar 617, the components of the combustion gas at the outlet of the central through hole 616 are split, and the split components of the combustion gas are more beneficial to being mixed with the components of the combustion gas refracted by the inner wall of the first barrel 611, so that the combustion sufficiency when flame is formed is further improved, the temperature of the flame is further beneficial to ensuring, and the welding quality and the welding efficiency of the quartz tube welding seal tube are further beneficial to being improved. The cross bar 617 may be of any suitable material. The cross piece 617 may be formed separately and welded into the central through hole 616, or may be formed integrally (i.e., of the same material as the body 615).

One end of the pipe assembly 62 is used in combination with the second cylinder portion 612 such that the pipe assembly 62 supplies components of combustion gas to the central through hole 616 and the peripheral through hole 614a, respectively, components of combustion gas entering through the peripheral through hole 614a are redirected onto the inner wall of the first cylinder portion 611 by interference of the bus bar 615a of the revolution body 615, and are refracted by the inner wall of the first cylinder portion 611 to be mixed with components of combustion gas passing through the central through hole 616, and the components of the mixed combustion gas reach the corresponding nozzle 2 through the gas delivery pipe 5, the third port 15, the second flow passage 14 of the ring body 1 to be suitable for quartz tube welding envelope.

In particular, as shown in fig. 4, 5 and 18, the conduit assembly 62 includes a connection pipe 621, a first air pipe 622 and a second air pipe 623. The connection pipe 621 has a central passage 621a and a peripheral passage 621b. The first air pipe 622 and the second air pipe 623 are installed at the other end of the connection pipe 621 and communicate with the central passage 621a and the circumferential passage 621b of the connection pipe 621, respectively. The first gas pipe 622 and the second gas pipe 623 are used for respectively and controllably supplying components of the combustion gas, and further supplying the components of the supplied combustion gas to the gas nozzle 61 for mixing via the connecting pipe 621, and the combustion gas with the components mixed reaches the corresponding nozzle 2 via the gas delivery pipe 5, the third port 15 and the second flow passage 14 of the ring body 1.

In addition, as shown in fig. 4 and 5, the first gas pipe 622 may be provided with a first valve 624, and the second gas pipe 623 may be provided with a second valve 625, so as to facilitate real-time adjustment or control of the flow rate of the components of the combustion gas.

Referring to fig. 4-7, the welding gun 300 may further include a support table 300b, the support table 300b providing support for the welding gun 300 a. Further, the welding gun 300a further includes a bracket 7 and a rocking mechanism 8. The support 7 is used for being fixed on the supporting table 300b, the swinging mechanism 8 is used for being arranged on the support 7 and the supporting table 300b, and the swinging mechanism 8 is connected to the ring body 1 and used for driving the ring body 1 to swing reciprocally around the axis.

The ring body 1 surrounding the quartz tube 2000 is kept stable in position in a vertical plane perpendicular to the axial direction of the ring body 1, i.e., the horizontal direction (the left-right direction D1 in fig. 1), by the bracket 7 for fixing on the support table 300b and the rocking mechanism 8 for setting on the bracket 7 and the support table 300b, thereby ensuring the stability of the quality of the welded seal of the quartz tube. The ring body 1 is driven to swing reciprocally around the axis by the swinging mechanism 8, so that the welding part sites of the whole circle between the quartz tube 2000 and the quartz sealing bulb 3000 can be connected together more quickly along the circumferential direction, and then the whole circle welding can be completed quickly.

The one-way angle of the swinging mechanism 8 driving the ring body 1 to swing reciprocally around the axis corresponds to the included angle corresponding to 3-5 nozzles 2 (i.e. small-angle reciprocal swinging). In this way, the welding part sites of the whole circle between the quartz sealing bubbles 3000 of the quartz tube 2000 are in close-packed fusion connection in the circumferential direction due to swinging, so that the welding part sites of the whole circle can be connected together in the circumferential direction more quickly, and the welding of the whole circle is completed quickly.

Further, as shown in fig. 4 to 7, the bracket 7 is provided with an arc-shaped swing passage P. The rocking mechanism 8 includes a telescopic cylinder 81, a connection block 82, and a base 83. The expansion cylinder 81 has a cylinder 811 and a piston 812, the cylinder 811 of the expansion cylinder 81 is pivotally connected to the support base 300b about the axial direction of the ring body 1 (the left-right direction D1 in fig. 1), and the piston 812 is movable into and out of the cylinder 811; the connection block 82 fixes the first tube 3, the second tube 4, and the gas delivery tube 5 together, and the connection block 82 is pivotally connected to the piston 812 of the telescopic cylinder 81 about the axial direction (the left-right direction D1 in fig. 1) of the ring body 1; the base 83 is fixedly connected to the outer peripheral surface 17 of the ring body 1, and the base 83 is provided with an arc plate 831, and the arc plate 831 penetrates through the swinging passage P of the bracket 7. Compared with the prior art that CN112408761A adopts a rotary hand lever to manually rotate the welding gun, in the welding gun 300a disclosed by the invention, the reciprocating swing of the automatic control ring body 1 can be realized by adopting the telescopic cylinder 81, so that not only is the labor saved, but also the reciprocating swing angle of the ring body 1 can be controlled more accurately, and the welding quality of the whole circle of welding of the quartz tube 2000 can be improved. The telescopic cylinder 81 may be a cylinder, or may be a hydraulic cylinder.

In one example, as shown in fig. 5, the bracket 7 includes a first vertical plate 71, a second vertical plate 72, a plurality of upper side columns 73, a plurality of lower side columns 74, and a connection column 75. The first standing plate 71 and the second standing plate 72 are opposed to each other in the axial direction of the ring body 1; a plurality of upper side cylinders 73 are arranged in an arc shape around the axial direction of the ring body 1; the plurality of lower side columns 74 are arranged in an arc shape around the axial direction of the ring body 1, an arc-shaped swing channel P is formed between the plurality of lower side columns 74 arranged in the arc shape and the plurality of upper side columns 73 arranged in the arc shape, and an arc-shaped plate 831 penetrates through the swing channel P of the bracket 7 and is limited by the first vertical plate 71 and the second vertical plate 72 at two sides of the left-right direction D1; the connecting post 75 connects the first and second risers 71, 72 together. In comparison with the structure of CN112408761a in the background art, in which the welding gun is horizontally suspended by the air inlet manifold, the first air outlet pipe, the second air outlet pipe, the air outlet manifold, and the connection device, in the welding gun 300a of the present disclosure, the structure of the bracket 7, in combination with the aforementioned swinging mechanism 8 including the telescopic cylinder 81, the connection block 82, and the base 83, makes the ring body 1 stand, and there is no large structural deflection like CN112408761a, so that the ring body 1 maintains a stable position in a vertical plane perpendicular to the axial direction (i.e., the horizontal direction (the left-right direction D1 in fig. 1)) of the ring body 1, thereby ensuring stability of the quality of the quartz tube welding seal tube.

The smaller the interval between the first and second risers 71, 72 is, the better, i.e., the smaller the interval between the first and second risers 71, 72 and the arc 831 is, respectively, in the right direction D1 without interfering with the reciprocal swing of the arc 831 through the swing passage P of the bracket 7.

As shown in fig. 7, the connection posts 75 may be located above the plurality of upper side posts 73.

As shown in fig. 7, the base 83 further has a first block 832 and a second block 833, the first block 832 and the second block 833 being disposed at opposite ends of the arc plate 831 in the circumferential direction and fixedly connecting the outer peripheral surface 17 of the ring body 1 and the arc plate 831; the first block 832, the second block 833, the arc plate 831 and the outer peripheral surface 17 of the ring body 1 enclose an accommodating space 834 penetrating along the circumferential direction; the upper side columns 73 are located in the accommodation space 834, and the lower side columns 74 are located outside the accommodation space 834. At this time, the connecting post 75 is also located in the accommodating space 834.

As shown in fig. 7, the bracket 7 further includes a first plate 76, the first plate 76 connects bottoms of the first and second standing plates 71, 72, and the first plate 76 is fixed to the support table 300 b. By matching the connecting post 75 and the first flat plate 76, the first vertical plate 71 and the second vertical plate 72 which are opposite along the axial direction of the ring body 1 are connected at the top and bottom, so that the bending resistance of the first vertical plate 71 and the second vertical plate 72 is enhanced, the overall structural strength of the bracket 7 is also enhanced, the ring body 1 further keeps stable position in a vertical plane vertical to the axial direction (namely, the left-right direction D1 in fig. 1) of the ring body 1, and the stability of the quality of the quartz tube welding seal is further ensured.

Referring to fig. 5, the welding torch 300 further includes a left-right moving mechanism 300c, and the left-right moving mechanism 300c can drive the support table 300b to reciprocate along the left-right direction D1 together with the welding torch 300 a. The left-right moving mechanism 300c drives the supporting table 300b to reciprocate along the left-right direction D1 together with the welding gun 300a, so that the ring body 1 of the welding gun 300 also reciprocates along the left-right direction D1, and thus the whole circle formed by the quartz tube 2000 and the quartz envelope 3000 is sealed in the axial direction (i.e. the left-right direction D1) of the quartz tube 2000 to have a certain length, and the sealing performance of the quartz tube welding envelope is improved. The stroke of the left-right moving mechanism 300c to reciprocate the support table 300b in the left-right direction D1 together with the welding torch 300a is determined by the length of the entire circle of the quartz tube 2000 and Dan Yingfeng bulb 3000 sealed in the axial direction (i.e., the left-right direction D1) of the quartz tube 2000.

Specifically, as shown in fig. 5, the left-right moving mechanism 300c includes a driving unit 300c1, two guide rails 300c2, and a plurality of rollers 300c3. The driving unit 300c1 is fixed, and the driving unit 300c1 is connected to the support table 300b and can drive the support table 300b to reciprocate along the left-right direction D1 together with the welding gun 300 a; two guide rails 300c2 are spaced apart in the front-rear direction D3 and are parallel to each other, each guide rail 300c2 extending in the left-right direction D1; the plurality of rollers 300c3 are connected to the support table 300b, and the plurality of rollers 300c3 are in rolling fit with the corresponding guide rails 300c 2. The driving unit 300c1 may take the form of a linear motor, a cylinder, a hydraulic cylinder, or the like. In fig. 5, the number of rollers 300c3 is four.

Referring to fig. 5, the pipe welder 300 further includes an up-down moving mechanism 300D, and the up-down moving mechanism 300D can drive the support table 300b to move along with the welding gun 300a in the up-down direction D2. The up-and-down movement mechanism 300D can move the ring body 1 of the adjustment welding gun 300a in the up-and-down direction D2 as well, so that the ring body 1 together with the plurality of nozzles 2 is adjusted in position with the quartz tube 2000 being centered in the up-and-down direction D2.

Specifically, as shown in fig. 5, the up-and-down movement mechanism 300d includes a driver 300d1, a connecting rod 300d2, and a plurality of guide rods 300d3. The connection rod 300d2 connects the support table 300b and the driver 300d 1; the driver 300D1 can drive the connecting rod 300D2 and the support table 300b to move up and down in the up-down direction D2 together with the welding torch 300 a; the plurality of guide rods 300d3 serve as guides when the support table 300b is lifted. Likewise, the actuator 300d1 may take the form of a linear motor, a cylinder, a hydraulic cylinder, or the like. In fig. 5, the guide 300d3 is four.

Referring to fig. 5, the welding torch 300 further includes a forward and backward moving mechanism 300e, and the forward and backward moving mechanism 300e can drive the support table 300b to move along with the welding torch 300a in the forward and backward direction D3. The forward/backward movement mechanism 300e can adjust the movement of the ring body 1 of the welding gun 300a in the forward/backward direction D3 so that the ring body 1 together with the plurality of nozzles 2 is centered on the quartz tube 2000 in the forward/backward direction D3.

Specifically, as shown in fig. 5, the forward-backward movement mechanism 300e includes a support plate 300e1, a plurality of slide rails 300e2, and a driver 300e3. The support plate 300e1 is located below the support table 300 b; the slide rails 300e2 are juxtaposed and spaced apart in the left-right direction D1, and each slide rail 300e2 extends in the front-rear direction D3; a driver 300e3 is provided on the support plate 300e1 for driving the support table 300b to move in the front-rear direction D3 together with the welding gun 300 a. In fig. 5, the slide rails 300e2 are paired. Likewise, drive machine 300e3 may take the form of a linear motor, cylinder, hydraulic cylinder, or the like.

Referring to fig. 3 and 5, the pipe welder 300 further includes a cabinet 300f, a PLC 300g, and a touch screen 300h. The support table 300b is provided on the cabinet 300 f; the PLC 300g is arranged in the cabinet 300f, and the PLC 300g is connected with an external cooling medium source, the air supply mechanism 6 and the swinging mechanism 8 of the welding gun 300a, the left-right moving mechanism 300c, the up-down moving mechanism 300d and the front-back moving mechanism 300e in a communication manner; the touch screen 300h is provided in the cabinet 300f and is communicatively connected to the PLC 300g. The touch screen 300h can improve the degree of automation of the pipe welder 300 by manually setting parameters of an external cooling medium source, the air supply mechanism 6 of the welding torch 300a, the swing mechanism 8, the left-right moving mechanism 300c, the up-down moving mechanism 300d, and the forward-backward moving mechanism 300 e.

The various exemplary embodiments are described using the above detailed description, but are not intended to be limited to the combinations explicitly disclosed herein. Thus, unless otherwise indicated, the various features disclosed herein may be combined together to form a number of additional combinations that are not shown for the sake of brevity.

Claims (10)

1. A gas receiving nozzle is characterized in that,

the gas nozzle (61) comprises a first cylinder (611), a second cylinder (612), a step (613), a base (614), a rotator (615), and a central through hole (616),

the first cylinder (611) has a first inner cavity (611 a);

the second barrel portion (612) has a second interior cavity (612 a);

the first cylinder part (611) and the second cylinder part (612) are arranged along the axial direction of the gas receiving nozzle (61) and are connected together through a step part (613);

the base part (614) is positioned in the second inner cavity (612 a) of the first cylinder part (611), the base part (614) is fixed on the step part (613) and shields the second inner cavity (612 a) of the second cylinder part (612), the base part (614) is provided with a surrounding through hole (614 a) surrounding the revolving body (615), and the surrounding through hole (614 a) is used for communicating the second inner cavity (612 a) of the second cylinder part (612) with the first inner cavity (611 a) of the first cylinder part (611);

the revolving body (615) is positioned in the second inner cavity (612 a), the revolving body (615) protrudes away from the second cylinder part (612) along the axial direction of the air receiving nozzle (61), the central through hole (616) penetrates through the revolving body (615) and the base part (614) along the axial direction of the air receiving nozzle (61), the central through hole (616) communicates the second inner cavity (612 a) of the second cylinder part (612) with the first inner cavity (611 a) of the first cylinder part (611),

On the axial cross section of the central axis of the over-center through hole (616) and the central axis of the surrounding through hole (614 a), the projection range of the surrounding through hole (614 a) along the axial direction of the gas receiving nozzle (61) intersects with a bus bar (615 a) of the revolving body (615) in the axial direction of the gas receiving nozzle (61);

the first cylinder (611) is used for being combined with one end of the gas conveying pipe (5) of the welding gun (300 a);

the second cylinder portion (612) is used for being combined with one end of a pipeline component (62) of a gas supply mechanism (6) of the welding gun (300 a) so that the pipeline component (62) respectively supplies components of combustion gas into the central through hole (616) and the peripheral through hole (614 a), the components of the combustion gas entering through the peripheral through hole (614 a) are deflected onto the inner wall of the first cylinder portion (611) by interference of a bus bar (615 a) of the revolving body (615), and are refracted by the inner wall of the first cylinder portion (611) to be mixed with the components of the combustion gas passing through the central through hole (616) so as to be at least suitable for quartz tube welding sealing.

2. The nozzle of claim 1, wherein the nozzle comprises a plurality of nozzles,

a bus bar (615 a) of a revolving body (615) includes a first circular arc line (615 a 1),

the first circular arc line (615 a 1) extends from the surface of the base platform part (614) along the axial direction of the air receiving nozzle (61), the first circular arc line (615 a 1) is concave towards the central axis of the central through hole (616),

A projection range of the peripheral through hole 614a in the axial direction of the air nozzle 61 intersects with a first circular arc line 615a1 of a bus bar 615a of the rotator 615 in the axial direction of the air nozzle 61.

3. The nozzle of claim 2, wherein the nozzle comprises a plurality of nozzles,

the bus bar (615 a) of the revolving body (615) also comprises a second circular arc line (615 a 2), the second circular arc line (615 a 2) extends from the first circular arc line (615 a 1) along the axial direction of the air receiving nozzle (61) and away from the first circular arc line (615 a 1), the second circular arc line (615 a 2) is outwards protruded away from the central axis of the central through hole (616),

the first arc line (615 a 1) and the second arc line (615 a 2) form an S shape.

4. The nozzle of claim 1, wherein the nozzle comprises a plurality of nozzles,

the plurality of peripheral through holes (614 a) is provided, and the plurality of peripheral through holes (614 a) are arranged at equal intervals around the revolution body (615).

5. The nozzle of claim 4, wherein the nozzle comprises a plurality of nozzles,

the diameter of the peripheral through hole (614 a) is the same as that of the central through hole (616) and is constant along the axial direction of the air nozzle (61).

6. The nozzle of claim 5, wherein the number of surrounding openings (614 a) is 4 or 5.

7. The nozzle of claim 1, wherein the nozzle comprises a plurality of nozzles,

the top surface (615 b) in the axial direction of the rotor (615) is a plane.

8. The nozzle of claim 1, wherein the nozzle comprises a plurality of nozzles,

the nozzle (61) further includes a cross bar (617), the cross bar (617) being disposed within the central through hole (616) at the top surface (615 b) to divide the central through hole (616) into two portions at the cross bar (617).

9. A gas supply mechanism is characterized in that,

comprising the nipple (61) of any one of claims 1-8 and a conduit assembly (62);

one end of the pipe assembly (62) is used for being combined with the second barrel part (612), so that the pipe assembly (62) respectively supplies components of combustion gas into the central through hole (616) and the peripheral through hole (614 a), the components of the combustion gas entering through the peripheral through hole (614 a) are deflected onto the inner wall of the first barrel part (611) by interference of a bus bar (615 a) of the revolving body (615), and are further refracted by the inner wall of the first barrel part (611) to be mixed with the components of the combustion gas passing through the central through hole (616), and the components of the mixed combustion gas reach the corresponding nozzles (2) through the gas conveying pipe (5), the third port (15) and the second flow channel (14) of the ring body (1) to be at least suitable for quartz tube welding sealing pipes.

10. The gas supply mechanism as set forth in claim 9, wherein,

the conduit assembly (62) comprises a connecting tube (621), a first gas tube (622) and a second gas tube (623);

The connecting pipe (621) has a central passage (621 a) and a peripheral passage (621 b);

the first air pipe (622) and the second air pipe (623) are arranged at the other end of the connecting pipe (621) and are respectively communicated with the central channel (621 a) and the peripheral channel (621 b) of the connecting pipe (621), the first air pipe (622) and the second air pipe (623) are used for respectively and controllably feeding components of combustion gas, and further, the fed components of the combustion gas are fed into the gas receiving nozzle (61) for mixing through the connecting pipe (621), and the combustion gas with the mixed components reaches the corresponding nozzle (2) through the gas conveying pipe (5), the third port (15) and the second flow channel (14) of the ring body (1).