TWI888783B - Gas mixing and burner connection structure - Google Patents

Abstract

Gas mixing and burner connection structure, it consists of a mixing device, a connecting pipe unit and a joint device; the mixing device includes a mixing plug with a round plug body with a central through hole and a fixed nut that can be screwed to the front end of the handle of the gas supply pipe. The joint device includes a connecting piece, a guide ring and a screw piece, and the flame spout pipe is sequentially passed through the screw piece, the sealing ring and the guide ring are fixed on the connecting piece. Then fix the mixing device at one end of the connecting pipe of the connecting pipe unit, and connect and fix the other end with the joint device. Connecting tubes of different lengths or diameters of the central channel can be quickly replaced according to different usage occasions or different operating habits, improving usability and efficacy.

Description

Gas mixing valve and flame nozzle connection structure

The present invention relates to a gas mixing plug and flame nozzle connection structure, which can quickly replace connecting pipes of different lengths or different center through-hole diameters by quickly separating the outer edge thread of the connecting pipe unit from the thread inside the mixing end of the mixing plug of the mixing device and the thread of the connecting hole in the connecting pipe of the connector device, providing applicability for different parameters or different operators, thereby improving the convenience and safety of use.

According to the new patent No. M545007, a "mini welder" including a first tube and a second tube is disclosed.

The first tube body is composed of a large diameter section and a small diameter section, wherein the small diameter section can be connected to the second tube body, and the outer surface of one end of the large diameter section forms an external threaded portion. In addition, it includes a plurality of gap rings and a plurality of fourth sealing rings spaced apart from each other and arranged in the large diameter section.

One end of the second tube body is connected to the first tube body, and a channel is formed inside the second tube body. The channel is gradually expanded from the end far from the first tube body toward the end near the first tube body. The end of the second tube body far from the first tube body has at least two through holes arranged radially, and each through hole is connected to the channel. It also has a first section, a second section, a third section, and a fourth section that are sequentially connected to each other. Two through holes are arranged at the fourth section, and the first section is connected to the first tube body.

The first screw sleeve is sleeved outside the third section of the second tube body, and the second screw sleeve is sleeved outside the large diameter section of the first tube body and is screwed and fixed with the external threaded portion; and the end of the second screw sleeve away from the first tube body can be connected to a quartz tube, and the quartz tube is connected to the channel, and a third sealing ring is provided between the end of the first tube body sleeved with the second screw sleeve and the inner end surface of the second screw sleeve.

When in use, the gas supply device is screwed and fixed to the first screw sleeve and connected to the channel of the second tube; the gas supply device can supply oxygen to the channel, and the gas supply device can also supply hydrogen to the two through holes. Since the two through holes are connected to the channel and the pressure of the oxygen is greater than the pressure of the hydrogen, the oxygen flows faster in the channel, forming a negative pressure outside the through hole, thereby sucking the hydrogen into the channel through the two through holes and mixing with the oxygen.

Furthermore, the channel formed inside the second tube of the mini welder is a gradually expanding structure from the end farthest from the first tube toward the end close to the first tube, that is, a trumpet-shaped diffusion mixing channel is formed, so that the main gas and the auxiliary gas are mixed in the trumpet-shaped channel. However, it is found that the trumpet-shaped mixing channel is fixed, and in general use, it is still easy to produce uneven and unstable mixing of the main and auxiliary fuels due to different usage parameters, such as different habitual operating users or different gas supply pressures, and then produce the risk of flashback. In particular, the fixed trumpet-shaped mixing channel is easy to accumulate carbon and impurities due to long-term use, and it is not easy to disassemble and clean.

The main purpose of the present invention is to provide a gas mixing plug and flame nozzle connection structure, which is provided by providing an internal thread on the mixing hole section of the mixing plug of the mixing device and providing a thread on the outer edge of one end of the connecting pipe unit, so that the thread on the outer edge of the connecting pipe can be screwed into the internal thread of the mixing hole section of the mixing plug, providing the efficiency of rapid disassembly, replacement or cleaning.

The secondary purpose of the present invention is to provide a gas mixing plug and flame nozzle connection structure, which is a technical means that the outer edge of one end of the connecting pipe of the connecting pipe unit is provided with threads, and the outer edge of the other end is also provided with threads, and the connecting hole in the connecting pipe of the connecting piece of the corresponding joint device is also provided with threads, so that the connecting pipe can be screwed to the mixing plug of the mixing device and the connecting piece of the joint device by the threads at both ends, so as to achieve the effect of rapid disassembly, replacement or cleaning.

Another purpose of the present invention is to provide a gas mixing plug and flame nozzle connection structure, which is a technical means of providing an inner thread on the outer edge of the connecting pipe and the mixing hole section of the mixing plug, so that the mixing plug can be screwed into the connecting pipe, and the through hole penetrating the center of the connecting pipe cooperates with the mixing plug perforation and the mixing hole to form a stepped gas channel to increase the gas mixing stability.

A further object of the present invention is to provide a gas mixing plug and flame nozzle connection structure, which is a technical means of providing threads at both ends of the connecting pipe and providing threads in the connecting holes of the connecting pipe of the mixing device and the connecting piece of the connecting piece of the connecting pipe, so that the connecting pipe can be respectively threaded with the mixing plug of the mixing device and the connecting piece of the connecting piece of the connecting piece of the connecting pipe, so as to achieve the purpose of quickly replacing the connecting pipes of different lengths or central channel diameters according to different usage occasions or different usage habits, thereby improving the use efficiency.

The invention relates to a gas mixing plug and flame nozzle connection structure, which is composed of a mixing device, a connecting pipe unit and a joint device. The mixing device includes: a mixing plug and a fixing nut. The mixing plug is a round plug body with a central through hole. The outer diameter of the middle section is the maximum diameter convex ring. One end extends to a nozzle end with a slightly smaller diameter, and then extends from the nozzle end to an inlet end with a smaller diameter. The other end of the convex ring also extends to a mixing end with a slightly smaller diameter. The central through hole is an inlet hole with an inner diameter slightly the same as the diameter of the main gas supply pipe, and then shrinks to a perforation section with a smaller hole diameter at the nozzle end, and then extends to the convex ring to expand into a mixing hole section with a larger hole diameter, and then continues to extend to the mixing end, and a threaded section is provided at an appropriate location. The fixing nut is a spiral tube with an internal thread on one end for screwing onto the front end of the gas supply pipe handle, and the other end extends into a tubular outer ring, and the inner diameter of the outer ring is appropriately formed into a smaller inner diameter snap-on section.

The connecting pipe unit is an oblong tubular connecting pipe with a thread of appropriate length on the outer edge of one end.

The joint device includes: a connecting piece, a guide ring, and a screw. The connecting piece has a through hole in the middle section, and one end of the body with a nut-shaped outer edge extends into a connecting tube with a larger diameter connecting hole, and the other end extends into a threaded end with a larger diameter plug-in hole, and the outer edge of the plug-in hole in the threaded end is a tapered bevel; the guide ring is annular, and one end forms a tapered bevel at the outer edge; the screw is a nut-shaped body that extends from one end to form an end face ring cover with a through hole.

By means of the above components, the mixing device is a mixing plug mixing end screwed with the front end of the gas supply pipe handle by a fixed nut, and the mixing plug convex ring is screwed with the buckling section of the inner diameter of the outer ring, so that the mixing plug can be locked to the front end of the handle with the large and small sealing rings; the joint device provides a flame nozzle pipe fitting to pass through the screw, the sealing ring and the guide ring in sequence and insert them into the connector insertion hole, and the guide ring can be used to taper the mixing plug. The tapered bevel of the plug-in hole and the tapered bevel of the plug-in hole automatically correct the function, quickly screw the threaded end of the connector with a screw, and lock the sealing ring and the guide ring with the end ring cover to fix the flame nozzle pipe; then screw the outer edge thread of one end of the connecting pipe of the connecting pipe unit with the inner thread of the mixing hole section of the mixing plug to fix the mixing device, and connect and fix the other end of the connecting pipe with the joint hole of the connector of the joint device.

The inner hole of the mixing end of the mixing plug of the mixing device forms a mixing hole section with a larger aperture, and is provided with an internal thread at an appropriate location; and the connecting pipe unit is provided with a thread of appropriate length at the outer edge of one end of the connecting pipe, and the outer edge thread of one end of the connecting pipe is screwed into the internal thread of the mixing hole section of the mixing plug to provide a quick disassembly performance.

Another embodiment of the present invention is to provide a thread on the outer edge of one end of the connecting pipe of the connecting pipe unit, and the outer edge of the other end is also provided with a thread, and the connecting hole in the connecting pipe of the connecting piece of the corresponding joint device is also provided with a thread, so that the connecting pipe can be screwed to the thread in the connecting hole by the thread. Furthermore, a polygon that can be engaged with a wrench is provided on the outer edge at an appropriate position in the middle section of the connecting pipe to facilitate the disassembly worker.

Therefore, the mixing device receives the main gas from the inlet hole at the inlet end and injects it into the mixing hole with a larger aperture through the perforation at the nozzle end. At the same time, the auxiliary gas also injects into the mixing hole through the oblique perforation at the nozzle end. The main and auxiliary gases are mixed in the mixing hole and enter the connecting pipe of the connecting pipe unit to continue to fully optimize the mixing. Then, they are introduced into the flame nozzle pipe fixed by the connector of the joint device to stably output the combustion. Therefore, the central channel of the gas is formed from the perforation at the nozzle end with the smallest aperture of the mixing plug of the mixing device, then to the mixing hole with a larger aperture, then to the central through hole of the connecting pipe, and then to the flame nozzle pipe to form a stepped mixing channel, so that the stepped channel can prevent the flashback and improve the gas mixing efficiency.

According to the above, the specific embodiment of the gas mixing plug and flame nozzle connection structure of the present invention can be quickly separated from the threads on the outer edge of the connecting pipe of the connecting pipe unit by the threads in the mixing end of the mixing plug of the mixing device and the threads in the connecting hole of the connecting pipe of the connector device, so as to quickly replace the connecting pipes of different lengths or different center through-hole diameters, provide applicability for different parameters or different operators, and improve the convenience and safety of use.

100:Handle

200: Mixing device

20: Mixing plug

21:Protruding ring

22: Shooting end

23: Entrance end

25: Hybrid end

26: Groove

220: Sealing ring

225: Perforation

226: Oblique shooting hole

230: Sealing ring

235:Entrance hole

210, 250: Mixed holes

251: Thread

30:Fixing nut

31: Outer Ring

32: Snap-fit section

33: Buckle

400:Connecting pipe unit

40: Connecting pipe

41, 45: Thread

42, 46: Grooves

43, 47: flange

500: Connector device

50: Connectors

51:Entity

52:Joint pipe

53:Joint hole

54: Plug-in hole

55: Threaded end

56: Tapered bevel

510:Through hole

530:Thread

60: Guide ring

61: Taper slope

65: Sealing ring

70: Screw fasteners

71:Entity

72: End ring cover

80: Flame nozzle

A: Welding point

The first figure is a three-dimensional diagram of the connection structure between the gas mixing plug and the flame nozzle of the present invention.

The second figure is a three-dimensional exploded view of the gas mixing plug and flame nozzle connection structure of the present invention.

The third figure is a cross-sectional view of the gas mixing device of the present invention with a gas mixing plug and a flame nozzle connecting structure.

The fourth figure is a cross-sectional view of the gas mixing device and the connecting pipe of the gas mixing plug and the flame nozzle connection structure of the present invention.

The fifth figure is a schematic diagram of the mixing effect of the gas mixing channel of the gas mixing plug and flame nozzle connection structure of the present invention.

Figure 6 is a cross-sectional view of the connection structure between the gas mixing plug and the flame nozzle of the present invention.

Figure 7 is a cross-sectional view of the welding of the flame nozzle joint and the connecting pipe of the gas mixing plug and flame nozzle connection structure of the present invention.

Figure 8 is a cross-sectional view of the connection structure between the gas mixing plug and the flame nozzle of the present invention.

Figure 9 is a cross-sectional view of the connection structure between the gas mixing plug and the flame nozzle of the present invention.

Figure 10 is a cross-sectional view of another embodiment of the flame nozzle joint of the gas mixing plug and flame nozzle connection structure of the present invention.

Figure 11 is a cross-sectional view of another embodiment of the flame nozzle joint of the gas mixing plug and flame nozzle connection structure of the present invention.

Figure 12 is a three-dimensional schematic diagram of the rapid disassembly of the flame nozzle joint of the gas mixing plug and flame nozzle connection structure of the present invention.

Figure 13 is a three-dimensional schematic diagram of another embodiment of the flame nozzle joint of the gas mixing plug and flame nozzle connection structure of the present invention, which is quickly disassembled.

The details of the gas mixing plug and flame nozzle connection structure of the present invention are described as follows with a specific embodiment and accompanying drawings:

Please refer to the first and second figures. The present invention is related to a gas mixing valve and flame nozzle connection structure, which is composed of a mixing device 200, a connecting pipe unit 400 and a joint device 500.

The mixing device 200 includes: a mixing plug 20 and a fixing nut 30.

Please refer to the third and fourth figures, the mixing plug 20 is a round plug body with a central through hole, the outer diameter of the middle section is the maximum diameter convex ring 21, one end extends to a slightly smaller diameter nozzle end 22, and then extends from the nozzle end 22 to an inlet end 23 with a smaller diameter, and the other end of the convex ring 21 also extends to a mixing end 25 with a smaller diameter and a groove 26 on the outer edge. At the stepped end surface of the nozzle end 22 and the inlet end 23, more than one oblique hole 226 is obliquely opened to communicate with the mixing hole 250 of the central through hole, and grooves are preset on the outer edges of the nozzle end 22 and the inlet end 23 for inserting sealing rings 220 and 23 respectively. The central through hole is an inlet hole 235 at the inlet end 23, which has an inner diameter roughly the same as the diameter of the main gas supply pipe, and then shrinks to a smaller diameter perforation 225 at the nozzle end 22, and then extends to the convex ring 21 to expand to a larger diameter mixing hole 210, and then continues to extend to the mixing end 25 to form a mixing hole 250 with an internal thread 251.

The fixing nut 30 is a spiral tube with an inner thread at one end for screwing into the front end of the gas supply pipe handle 100, and the other end extends into a tubular outer ring 31, and the inner diameter of the outer ring 31 is appropriately formed into a buckle section 32 with a smaller inner diameter (as shown in Figure 9), and a groove is provided at an appropriate position of the inner diameter of the buckle section 32 for fitting the "C" type buckle ring 33.

The connecting pipe unit 400 is an oblong tubular connecting pipe 40, with a thread 41 of appropriate length provided on the outer edge of one end, and a small section of non-threaded groove 42 is recessed near the end surface of the thread 41, so that the end surface forms a flange 43.

The joint device 500 includes: a connecting piece 50, a guide ring 60, and a screw 70.

The connector 50 has a through hole 510 in the middle (as shown in the sixth figure), and the main body 51 with a nut-shaped outer edge extends at one end into a connecting tube 52 with a larger diameter connecting hole 53, and at the other end extends into a threaded end 55 with a larger diameter plug-in hole 54, and the outer edge of the plug-in hole 54 in the threaded end 55 is a tapered bevel 56.

The guide ring 60 is ring-shaped, and one end of the guide ring 60 has a conical slope 61 formed on the outer edge.

The screw 70 is an end ring cover 72 with a through hole extending from one end of the nut-shaped body 71.

Please refer to the eighth and ninth figures, the mixing device 200 is a device that is screwed with the mixing end 25 of the mixing plug 20 and the front end of the gas supply pipe handle 100 by means of the fixing nut 30, and the mixing plug 20 is screwed with the convex ring 21 of the mixing plug 20 by means of the buckling section 32 of the inner diameter of the outer ring 31, so that the mixing plug 20 can be locked to the front end of the handle 100. The outer edge thread 41 of the connecting pipe unit 400 is screwed to the thread 251 inside the mixing end 25 of the mixing plug 20, and the other end is inserted into the connecting hole 53 of the connecting piece 50 of the connector device 500 (as shown in the sixth and seventh figures), and is fixed by welding at the end surface of the connecting pipe 52 by welding point A. The joint device 500 provides a flame ejection nozzle 80 pipe fitting that sequentially passes through the screw 70, the sealing ring 65 and the guide ring 60 and is inserted into the insertion hole 54 of the connector 50. The conical bevel 61 of the guide ring 60 and the conical bevel 56 of the insertion hole 54 can be used for automatic correction. The screw 70 is quickly screwed into the threaded end 55 of the connector 50, and the end face ring cover 72 is used to lock the sealing ring 65 and the guide ring 60 to fix the flame ejection nozzle 80 pipe fitting.

Therefore, as shown in the fifth figure, the mixing device 200 receives the main gas from the inlet hole 235 at the inlet end 23 and injects it into the mixing hole 210 with a larger aperture through the perforation 225 at the nozzle end 22. At the same time, the auxiliary gas is injected into the mixing hole 210 with a larger aperture through the oblique perforation 226 at the nozzle end 22. The main and auxiliary gases are mixed in the mixing hole 210 and enter the connecting pipe 40 of the connecting pipe unit 400 to continue to fully optimize the mixing. Then, they are introduced into the flame nozzle 80 pipe fixed by the connecting piece 50 of the joint device 500 to stably output the combustion.

According to the above, as shown in Figure 12, the specific embodiment of the gas mixing plug and flame nozzle connection structure of the present invention can be quickly separated from the thread 251 inside the mixing end 25 of the mixing plug 20 of the mixing device 200 by the outer edge thread 41 of the connecting pipe 40 of the connecting pipe unit 400, so that the connecting pipe 40 with different lengths or different center through-hole diameters can be replaced to achieve the expected performance.

As shown in FIG. 10, another embodiment of the present invention is that a thread 41 is provided on the outer edge of one end of the connecting pipe 40 of the connecting pipe unit 400, and a thread 45 is also provided on the outer edge of the other end, and a small section of a non-threaded groove 46 is concavely provided at the proximal end surface of the thread 45, so that the end surface forms a flange 47. The connecting hole 53 in the connecting pipe 52 of the connecting member 50 of the opposite joint device 500 is also provided with a thread 530, so that the connecting pipe 40 can be screwed to the thread 530 in the connecting hole 53 by the thread 45. As shown in FIG. 13, the connecting tube 40 of the connecting tube unit 400 can be quickly separated from the thread 251 in the mixing end 25 of the mixing plug 20 of the mixing device 200, and the other end can also be quickly separated from the thread 530 in the connecting hole 53 of the connecting tube 52 of the connecting piece 50 of the connector 500, which can be conveniently replaced with connecting tubes 40 of different lengths or different center through-hole diameters.

Furthermore, a polygonal shape that can be engaged with a wrench is provided at an appropriate position on the outer edge of the middle section of the connecting pipe 40 to facilitate disassembly workers.

In summary, the specific embodiments are described in detail with drawings. In addition to improving the gas mixing stability by means of the stepped gas channel technology, the present invention also uses the technology of quickly replacing the connecting tubes of different lengths or center channel diameters to achieve the goal of quickly replacing the connecting tubes of different lengths or center channel diameters according to different usage occasions or different usage habits, thereby improving the usability and efficiency, and providing the performance of rapid disassembly and cleaning, which is particularly advanced and safe for industrial use.

100:Handle

200: Mixing device

20: Mixing plug

21:Protruding ring

22: Shooting end

23: Entrance end

25: Hybrid end

26: Groove

220: Sealing ring

230: Sealing ring

30:Fixing nut

31: Outer Ring

33: Buckle

400:Connecting pipe unit

40: Connecting pipe

41: Thread

42: Groove

43: flange

500: Connector device

50: Connectors

51:Entity

52:Joint pipe

60: Guide ring

61: Taper slope

65: Sealing ring

70: Screw fasteners

71:Entity

72: End ring cover

80: Flame nozzle

Claims (4)

A gas mixing plug and flame nozzle connection structure is composed of a mixing device, a connecting pipe unit and a joint device; wherein the mixing device includes: a mixing plug, which is a round plug body with a central through hole, the outer diameter of the middle section is a convex ring with a maximum diameter, one end extends to a nozzle end with a slightly smaller diameter, and then extends from the nozzle end to an inlet end with a smaller diameter, and the other end of the convex ring also extends to a mixing end with a slightly smaller diameter; the central through hole is an inlet hole with an inner diameter slightly the same as the diameter of the main gas supply pipe, and then shrinks to a smaller diameter at the nozzle end. The perforating section then extends to the convex ring to expand into a mixing hole section with a larger aperture, and the mixing hole section is provided with an internal thread at an appropriate position; a fixing nut is a spiral tube with an internal thread at one end for screwing the front end of the handle of the gas supply pipe, and the other end extends into a tubular outer ring, and the inner diameter of the outer ring is appropriately formed into a buckling section with a smaller inner diameter; the connecting pipe unit is an oblong tubular connecting pipe, and the outer edge of one end is provided with a thread of appropriate length; the joint device includes: a connecting piece, which has a through hole in the middle section, and one end of the main body with a nut-shaped outer edge extends into a The coupling tube with a larger diameter coupling hole has the other end extending into a threaded end with a larger diameter plug-in hole, and the outer edge of the plug-in hole in the threaded end is tapered; a guide ring is annular, and one end forms a tapered slope at the outer edge; a screw member is extended from one end of the nut-shaped body to form an end face ring cover with a through hole; through the above components, the mixing device is screwed with the mixing end of the mixing plug and the front end of the handle of the gas supply pipe by the fixing nut, and the mixing plug convex ring is fastened by the buckling section of the inner diameter of the outer ring, so that the mixing plug can be locked with the large and small sealing rings At the front end of the handle; the joint device provides the flame nozzle pipe fitting to pass through the screw, the sealing ring and the guide ring in sequence and insert into the connector insertion hole. The guide ring can automatically correct the tapered bevel of the guide ring and the tapered bevel of the insertion hole, and the threaded end of the connector is quickly screwed with the screw, and the sealing ring and the guide ring are locked with the end ring cover to fix the flame nozzle pipe fitting; and then the outer edge thread of one end of the connecting pipe of the connecting pipe unit is screwed with the inner thread of the mixing hole section of the mixing bolt to fix the mixing device, and the other end of the connecting pipe is connected and fixed with the joint hole of the joint device. As described in claim 1, the gas mixing valve and flame nozzle connection structure, wherein the outer edge of one end of the connecting pipe of the connecting pipe unit is provided with threads, and the outer edge of the other end is also provided with threads, and the connecting hole in the connecting pipe of the connecting piece of the corresponding joint device is also provided with threads, so that the connecting pipe can be screwed to the threads in the connecting hole by the threads. The gas mixing valve and flame nozzle connection structure as described in claim 1 or 2, wherein a polygonal shape that can be engaged with a wrench is provided at an appropriate outer edge of the middle section of the connecting pipe. The gas mixing plug and flame nozzle connection structure as described in claim 1 or 2, wherein a small section of non-threaded groove is recessed near the end surface of the outer edge thread of the connecting pipe, so that the end surface forms a flange.

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