Natural gas grading gun structure

Abstract

The utility model provides a natural gas classification gun structure which comprises an ignition device and an air distribution device which are used in cooperation with a natural gas classification gun, the ignition device is used for igniting natural gas in the natural gas classification gun, the air distribution device is used for blowing out the ignited natural gas, and the natural gas classification gun structure further comprises a gas ring with an annular inner wall and an annular outer wall. A first through hole is formed in the annular outer wall and communicates with a natural gas pipeline, and a plurality of second through holes are formed in the annular inner wall in the circumferential direction. The natural gas gun sets are consistent with the second through holes in number, each natural gas gun set comprises a gas inlet assembly communicated with the corresponding second through hole and two natural gas guns, the two natural gas guns are arranged in the first direction and extend in the second direction, and the two natural gas guns share one gas inlet assembly; according to the structure, the channels of the natural gas gun are additionally arranged, so that the natural gas is shunted, flame grading is achieved, and the flame temperature is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of asphalt mixing station burners, and in particular to a natural gas grading gun structure. Background Art

[0002] At present, environmental protection requirements are becoming more and more stringent, and the requirements for the nitrogen oxide content in the flue gas emitted when natural gas is burned are also getting higher and higher. The natural gas air guns in the existing technology are generally level one. During the combustion of natural gas, due to the high temperature, a lot of nitrogen oxides will be produced. The nitrogen oxides are discharged to the outside world and will cause pollution to the environment. Utility Model Content

[0003] The purpose of the present application is to solve the above problems and provide a natural gas grading gun structure, including an ignition device and an air distribution device used in conjunction with the natural gas grading gun, wherein the ignition device is used to ignite the natural gas inside the natural gas grading gun, and the air distribution device is used to blow out the ignited natural gas, and further includes:

[0004] A gas ring, wherein an annular cavity is formed in the gas ring, the gas ring comprises an annular inner wall and an annular outer wall, a first through hole is opened on the annular outer wall, the first through hole is connected to a natural gas pipeline, and a plurality of second through holes are circumferentially arranged on the annular inner wall;

[0005] A plurality of gas gun groups having the same number as the second through holes, each of the gas gun groups comprising two gas guns arranged in a first direction and extending in a second direction, and an air intake assembly connecting the gas guns with the second through holes, the first direction being perpendicular to the second direction;

[0006] One end of the natural gas gun away from the air intake assembly is connected to a natural gas nozzle, and a plurality of flame nozzles are circumferentially arranged on the natural gas nozzle around a first axis. The first axis is the axis of the natural gas nozzle and extends along the second direction.

[0007] According to the technical solution provided in the embodiment of the present application, the natural gas nozzle includes a cylindrical first flame-spraying part and a conical second flame-spraying part, the flame-spraying nozzle is arranged on the first flame-spraying part, the large-diameter end of the second flame-spraying part is connected to the first flame-spraying part, the small-diameter end of the second flame-spraying part is closed, and a plurality of second flame-spraying ports are arranged on the side wall of the second flame-spraying part around the first axis.

[0008] According to the technical solution provided in the embodiment of the present application, the natural gas grading gun structure also includes a flame tube assembly connected to the gas ring, a first space is formed inside the flame tube assembly, the natural gas gun group is located in the first space, the flame tube assembly includes a first section in a frustum shape, the large-diameter end of the first section is arranged away from the gas ring, and a reflux port connected to the outside is provided in the circumference of the side wall of the first section.

[0009] According to the technical solution provided in the embodiment of the present application, the flame tube assembly also includes a first flame tube connected to the gas ring, the end of the first flame tube away from the gas ring is connected to a flange, the flange is connected to the small-diameter end of the first division, and the large-diameter end of the first division is connected to a second flame tube.

[0010] According to the technical solution provided in the embodiment of the present application, a fixing plate is further provided in the first space, a plurality of first fixing parts are circumferentially provided on the outer edge of the fixing plate, a first mounting hole is provided in the middle of the fixing plate, a return plate is provided in the first mounting hole, a plurality of second fixing parts of the same number as the first fixing parts are provided at a position of the return plate relatively close to the outer edge and corresponding to the first fixing part, a second mounting hole is provided in the middle of the return plate, and the return plate comprises:

[0011] A support portion disposed in the second mounting hole, and a plurality of reflux portions circumferentially disposed on the outer edge of the support portion, wherein a plane where the reflux portion is located forms an angle with a plane where the fixing plate is located, an end of the reflux portion away from the support portion is connected to an inner edge of the fixing plate, and the support portion and the fixing plate are coaxial and in the same plane;

[0012] One end of one of the gas guns that is relatively close to the gas nozzle is located in the first fixing portion, and another end of the gas gun that is relatively close to the gas nozzle is located in the second fixing portion;

[0013] The air distribution device is located on one side of the gas ring and has a fixed shaft. The fixed shaft extends into the first space and is connected to the connecting tube. Under the action of the air distribution device, the return plate is used to send part of the smoke generated during the combustion of natural gas to the second flame outlet.

[0014] According to the technical solution provided in the embodiment of the present application, the air intake assembly includes a connecting plate connected to the annular inner wall, a third through hole is opened in the middle of the connecting plate, and the third through hole is connected to the second through hole. The air intake assembly also includes a first pipe connected to one of the natural gas guns and a second pipe connected to the other natural gas gun, and the first pipe and the second pipe are both connected to the third through hole.

[0015] According to the technical solution provided in the embodiment of the present application, a graphite gasket is further provided between the connecting plate and the annular inner wall, and an air hole connecting the first through hole with the third through hole is provided on the graphite gasket.

[0016] According to the technical solution provided in the embodiment of the present application, each of the natural gas guns includes a first ventilation pipe and a second ventilation pipe arranged along the second direction, the first ventilation pipe is connected to the first pipe and the second pipe at one end away from the third through hole, the second ventilation pipe is connected to the natural gas nozzle, the inner wall of the first ventilation pipe is provided with a first thread, the outer wall of the second ventilation pipe is provided with a second thread, and the diameter of the second ventilation pipe is smaller than the diameter of the first ventilation pipe, and the first ventilation pipe is threadedly connected to the second ventilation pipe.

[0017] According to the technical solution provided in the embodiment of the present application, the natural gas nozzle includes a connecting portion arranged on the side of the first flame spraying portion away from the second flame spraying portion, the connecting portion is sleeved on the outside of the second ventilation pipe and connected thereto, an end plate is provided at one end of the second ventilation pipe and inside the connecting portion, a fourth through hole in the shape of a cone is provided in the middle of the end plate, and the fourth through hole is used to adjust the flow rate of the natural gas sprayed from the second ventilation pipe.

[0018] According to the technical solution provided in the embodiment of the present application, the natural gas grading gun structure also includes a fastening bolt, and a plurality of fifth through holes are circumferentially provided on the connecting portion, and one end of the fastening bolt enters from the fifth through hole and abuts against the outer wall of the second ventilation pipe.

[0019] Compared with the prior art, the present application has the following beneficial effects: the natural gas gun grading structure described in the present application includes an ignition device and an air distribution device used in conjunction with the natural gas grading gun, the ignition device is used to ignite the natural gas in the natural gas grading gun, the air distribution device is used to blow out the ignited natural gas, and also includes a gas ring having an annular inner wall and an annular outer wall, a first through hole is opened on the annular outer wall, the first through hole is connected to the natural gas pipeline, and a plurality of second through holes are circumferentially arranged on the annular inner wall; and also includes a plurality of natural gas gun groups with the same number as the second through holes, each natural gas gun group includes an air intake assembly connected to the second through hole, and two natural gas guns, the two natural gas guns are arranged along the first direction and extend along the second direction, and the two natural gas guns share one air intake assembly;

[0020] During use, the natural gas coming from the outside enters the annular cavity through the first through hole from the natural gas pipeline, and enters each natural gas gun group through multiple second through holes on the annular inner wall, and enters the two natural gas guns through the air intake assembly. Then, in conjunction with the ignition device and the air distribution device, the flame combustion can be realized, and the burning flame is ejected from the flame nozzle on the natural gas nozzle;

[0021] Under the same working conditions, compared with the prior art, the structure described in the present application diverts the natural gas by increasing the channels of the natural gas gun to achieve flame grading, that is, by increasing the number of flames to reduce the temperature of each level of flame. When the temperature of the flame is reduced, the nitrogen oxides produced will be relatively reduced, and thus the content of nitrogen oxides emitted into the atmosphere will also be reduced accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 An overall view of the natural gas staging gun structure provided for an embodiment of the present application;

[0023] Figure 2 A front view of the natural gas staging gun structure provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of a natural gas gun provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the connection between a natural gas gun and a gas ring provided in an embodiment of the present application;

[0026] Figure 5 A schematic diagram of the structure of a natural gas nozzle provided in an embodiment of the present application;

[0027] Figure 6 A schematic diagram of a natural gas gun provided in an embodiment of the present application having an end plate inside;

[0028] Figure 7 A schematic diagram of the connection between the gas ring and the natural gas gun provided in an embodiment of the present application;

[0029] Figure 8 A schematic diagram of the structure of the return plate provided in the embodiment of the present application;

[0030] Fig. 9 A schematic diagram of a connecting tube provided in an embodiment of the present application.

[0031] The text markings in the figure are as follows: 1. gas ring; 101. annular inner wall; 102. annular outer wall; 2. natural gas pipeline; 3. natural gas gun; 4. natural gas nozzle; 401. first flame spraying part; 402. second flame spraying part; 403. second flame spraying port; 404. connecting part; 5. flame spraying nozzle; 6. first subdivision; 7. first flame tube; 8. flange; 9. second flame tube; 10. fixing plate; 103. first fixing part; 11. reflux plate; 104. second fixing part; 105. supporting part; 106. reflux part; 12. connecting plate; 13. third through hole; 14. first pipeline; 15. second pipeline; 16. graphite gasket; 17. first ventilation pipe; 18. second ventilation pipe; 19. end plate; 20. fourth through hole; 21. fastening bolt; 211. fifth through hole; 22. connecting tube; 23. connecting rod; 24. supporting ring. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is described in detail below in conjunction with the accompanying drawings. The description in this section is only exemplary and explanatory and should not have any limiting effect on the scope of protection of the present application.

[0033] The present application provides a natural gas grading gun structure, comprising an ignition device and an air distribution device used in conjunction with the natural gas grading gun, wherein the ignition device is used to ignite the natural gas inside the natural gas grading gun, and the air distribution device is used to blow out the ignited natural gas, and further comprising:

[0034] A gas ring 1, wherein an annular cavity is formed in the gas ring 1, the gas ring 1 comprises an annular inner wall 101 and an annular outer wall 102, a first through hole is formed on the annular outer wall 102, the first through hole is connected to the natural gas pipeline 2, and a plurality of second through holes are circumferentially formed on the annular inner wall 101;

[0035] A plurality of gas gun groups having the same number as the second through holes, each of the gas gun groups comprising two gas guns 3 arranged along a first direction and extending along a second direction, and an air intake assembly, the two gas guns 3 share one air intake assembly, the air intake assembly is connected to the second through holes, and the first direction is perpendicular to the second direction;

[0036] The end of the gas gun 3 away from the air intake assembly is connected to a gas nozzle 4, and the gas nozzle 4 is provided with a plurality of flame nozzles 5 circumferentially around a first axis. The first axis is the axis of the gas nozzle 4 and extends along the second direction.

[0037] Specifically, in this embodiment, the natural gas grading gun structure includes an ignition device and an air distribution device used in conjunction with the natural gas grading gun, the ignition device is used to ignite the natural gas inside the natural gas grading gun, and the air distribution device is used to blow out the ignited natural gas. The natural gas grading gun structure also includes:

[0038] Gas ring 1, such as Figure 1 and Figure 2 As shown, the gas ring 1 includes an annular inner wall 101 and an annular outer wall 102, and the annular inner wall 101 and the annular outer wall 102 together form an annular cavity. A first through hole is opened on the annular outer wall 102, and the first through hole is connected to the external natural gas pipeline 2. The external natural gas enters the annular cavity from the natural gas pipeline 2 for temporary storage. A plurality of second through holes are opened on the annular inner wall 101, and the second through holes are circumferentially arranged around the axis of the gas ring 1. The natural gas grading gun structure also includes a natural gas gun group, and the number of the natural gas gun groups is consistent with the number of the second through holes, and each of the natural gas gun groups includes two A natural gas gun 3, wherein two of the natural gas guns 3 are arranged along a first direction and extend along a second direction, wherein the second direction is perpendicular to the first direction, and further comprises an air intake assembly connecting the natural gas gun 3 with the second through hole, wherein the air intake assembly is used to divert the natural gas from the inside of the natural gas pipeline 2 so that it flows to the two natural gas guns 3 respectively; a natural gas nozzle 4 is connected to one end of the natural gas gun 3 away from the air intake assembly, and a plurality of flame nozzles 5 are provided on the natural gas nozzle 4, and the plurality of flame nozzles 5 are arranged circumferentially around a first axis, wherein the first axis is the axis of the natural gas nozzle 4, and the first axis extends along the second direction.

[0039] During use, the natural gas coming from the outside enters the annular cavity through the first through hole from the natural gas pipeline, and enters each natural gas gun group through multiple second through holes on the annular inner wall, and enters the two natural gas guns through the air intake assembly. Then, in conjunction with the ignition device and the air distribution device, the flame combustion can be realized, and the burning flame is ejected from the flame nozzle on the natural gas nozzle;

[0040] Under the same working conditions, compared with the prior art, the structure described in the present application diverts the natural gas by increasing the channels of the natural gas gun to achieve flame grading, that is, by increasing the number of flames to reduce the temperature of each level of flame. When the temperature of the flame is reduced, the nitrogen oxides produced will be relatively reduced, and thus the content of nitrogen oxides emitted into the atmosphere will also be reduced accordingly.

[0041] Furthermore, the natural gas nozzle 4 includes a cylindrical first flame-spraying part 401 and a conical second flame-spraying part 402, the flame-spraying nozzle 5 is arranged on the first flame-spraying part 401, the large-diameter end of the second flame-spraying part 402 is connected to the first flame-spraying part 401, the small-diameter end of the second flame-spraying part 402 is closed, and a plurality of second flame-spraying ports 403 are arranged on the side wall of the second flame-spraying part 402 around the first axis.

[0042] Specifically, in this embodiment, Figure 5 As shown, the natural gas nozzle 4 includes a cylindrical first flame spraying part 401 and a conical second flame spraying part 402, the flame nozzle 5 is arranged on the first flame spraying part 401, the large-diameter end of the second flame spraying part 402 is connected to the first flame spraying part 401, and the small-diameter end of the second flame spraying part 402 is closed, and a plurality of second flame spraying ports 403 are arranged on the side wall of the second flame spraying part 402 around the first axis. The flame of the natural gas during the combustion process is ejected from the flame nozzle 5, and a part of smoke is also generated during the combustion process, and the smoke contains nitrogen oxides. The smoke containing nitrogen oxides flows out from the second flame spraying port 403.

[0043] Furthermore, the natural gas grading gun structure also includes a flame tube assembly connected to the gas ring 1, a first space is formed inside the flame tube assembly, the natural gas gun group is in the first space, the flame tube assembly includes a first section 6 in a frustum shape, the large-diameter end of the first section 6 is arranged away from the gas ring 1, and a reflux port 601 connected to the outside is provided in the circumferential direction of the side wall of the first section 6.

[0044] Specifically, in this embodiment, Figure 2 As shown, the natural gas grading gun structure also includes a flame tube assembly, which is connected to the gas ring 1. A first space is formed in the flame tube assembly 1, and the natural gas gun group is located in the first space. The flame tube assembly includes a first subdivision 6, and the first subdivision 6 is in a frustum shape. A return port 601 connected to the outside is circumferentially arranged on the first subdivision 6. The position of the return port 601 can correspond to the position of the second flame vent 403, and can also be staggered with the position of the second flame vent 403. The return port 601 is in a triangular shape, as shown in FIG. Figure 2 As shown, the large-diameter end of the first section 6 is arranged away from the gas ring 1 .

[0045] Furthermore, the flame tube assembly also includes a first flame tube 7 connected to the gas ring 1, the end of the first flame tube 7 away from the gas ring 1 is connected to a flange 8, the flange 8 is connected to the small-diameter end of the first division 6, and the large-diameter end of the first division 6 is connected to a second flame tube 9.

[0046] Specifically, in this embodiment, Figure 2 and Figure 4 As shown, the flame tube assembly also includes a first flame tube 7, which is cylindrical, one end of the first flame tube 7 is connected to the gas ring 1, the other end of the first flame tube 7 is bolted to a flange 8, the flange 8 is bolted to the small-diameter end of the first section 6, and the large-diameter end of the first section 6 is bolted to a second flame tube 9, and the ignited natural gas is ejected from the second flame tube 9.

[0047] Further, a fixing plate 10 is further provided in the first space, and a plurality of first fixing portions 103 are circumferentially provided on the outer edge of the fixing plate 10, a first mounting hole is provided in the middle of the fixing plate 10, a return plate 11 is provided in the first mounting hole, and a plurality of second fixing portions 104 having the same number as the first fixing portions 103 are provided at a position of the return plate 11 relatively close to the outer edge and corresponding to the first fixing portion 103, a second mounting hole is provided in the middle of the return plate 11, and the return plate 11 comprises:

[0048] A support portion 105 disposed in the second mounting hole, and a plurality of reflux portions 106 circumferentially disposed on the outer edge of the support portion 105, wherein a plane where the reflux portions 106 are located forms an angle with a plane where the fixing plate 10 is located, an end of the reflux portion 106 away from the support portion 105 is connected to an inner edge of the fixing plate 10, and the support portion 105 and the fixing plate 10 are coaxial and in the same plane;

[0049] One end of one of the gas guns 3 closer to the gas nozzle 4 is located in the first fixing portion 103 , and another end of the gas gun 3 closer to the gas nozzle 4 is located in the second fixing portion 104 ;

[0050] The air distribution device is located on one side of the gas ring 1 and has a fixed shaft. The fixed shaft extends into the first space and is connected to the support portion 105. The return plate 11, under the action of the air distribution device, is used to deliver part of the flue gas generated during the combustion of natural gas to the second flame outlet 403.

[0051] Specifically, in this embodiment, Figure 7 , Figure 8 and Fig. 9As shown, a fixing plate 10 is further provided in the first space, and the fixing plate 10 is circular, and a plurality of first fixing portions 103 are circumferentially provided along the outer edge of the fixing plate 10, and the first fixing portion 103 is semicircular, and the opening of the first fixing portion 103 is away from the axis of the fixing plate 10, and a first mounting hole is provided in the middle of the fixing plate 10, and a return plate 11 is provided in the first mounting hole, and a second fixing portion 104 is provided on a portion of the return plate 11 relatively close to the outer edge, and the number of the second fixing portions 104 is consistent with the number of the first fixing portions 103, and the positions are corresponding, and a second mounting hole is provided in the middle of the return plate 11, and the return plate 11 includes:

[0052] A support portion 105 in a circular shape is provided in the second mounting hole, and a plurality of reflux portions 106 are provided on the outer edge of the support portion 105. The plane where the reflux portions 106 are located forms an angle with the plane where the fixing plate 10 is located. The second fixing portion 104 can be provided on each of the reflux portions 106, or can be composed of two adjacent reflux portions 106. Figure 8 As shown, one end of each of the reflux portions 106 away from the support portion 105 is connected to the inner edge of the fixing plate 10, for example, by welding, and the support portion 105 and the fixing plate 10 share an axis and are on the same plane; one end of one of the gas guns 3 relatively close to the gas nozzle 4 is in the first fixing portion 103, and the other end of the gas gun 3 relatively close to the gas nozzle 4 is in the second fixing portion 104, and the first fixing portion 103 and the second fixing portion 103 are used to provide support for the two gas guns 3 to prevent the two gas guns 3 from falling off during operation, and the air distribution device is provided on one side of the gas ring 1, and the air distribution device has a fixed shaft, and the fixed shaft extends into the first space and is connected to a first A connecting piece, the other end of the first connecting piece is connected to the supporting portion 105, the first connecting piece includes a cylindrical connecting tube 22, a plurality of connecting rods 23 are arranged circumferentially on the outer wall of the connecting tube 22, the plurality of connecting rods 23 are respectively connected to the surface of each of the reflow portions 106, and a circular supporting ring 24 is arranged inside one end of the plurality of connecting rods 23 relatively close to the reflow portion 106, for supporting the reflow portion 106 and ensuring the stability of the connection between the connecting rod 23 and the reflow portion 106; when the air distribution device blows air into the first space, a large part of the wind will carry the flame to the inside of the second flame tube 9, and another small part of the wind will form a vortex flow due to the existence of the reflow plate 11, and the formed vortex flow will carry part of the smoke out through the reflow port 6.

[0053] Furthermore, the air intake assembly includes a connecting plate 12 connected to the annular inner wall 101, a third through hole 13 is opened in the middle of the connecting plate 12, and the third through hole 13 is connected to the second through hole. The air intake assembly also includes a first pipe 14 connected to one of the natural gas guns 3, and a second pipe 15 connected to the other natural gas gun 3. The first pipe 14 and the second pipe 15 are both connected to the third through hole 13.

[0054] Specifically, in this embodiment, Figure 3 As shown, the air intake assembly includes a connecting plate 12 connected to the annular inner wall 101, a third through hole 13 is opened in the middle of the connecting plate 12, the third through hole 13 is communicated with the second through hole, the connecting plate 12 is threadedly connected to the annular inner wall 101, and the air intake assembly also includes a first pipe 14 and a second pipe 15, the first pipe 14 is connected to one of the natural gas guns 3, the second pipe 15 is connected to the other natural gas gun 3, the first pipe 14 and the second pipe 15 are both communicated with the third through hole 13, the natural gas entering from the inside of the natural gas pipeline 2 enters the inside of the annular cavity, and enters the corresponding natural gas gun group through several second through holes and third through holes 13 on the annular inner wall 101, and enters the corresponding natural gas gun 3 through the first pipe 14 and the second pipe 15 respectively.

[0055] Furthermore, a graphite gasket 16 is provided between the connecting plate 12 and the annular inner wall 101 , and an air hole for connecting the first through hole with the third through hole 13 is provided on the graphite gasket 16 .

[0056] Specifically, in this embodiment, Figure 4 As shown, a graphite gasket 16 is further provided between the connecting plate 12 and the annular inner wall 101, and an air hole connecting the first through hole with the third through hole 13 is also provided on the graphite gasket 16, and the graphite gasket 16 is used to enhance the sealing between the connecting plate 12 and the annular inner wall 101 to prevent leakage of natural gas during transmission.

[0057] Furthermore, each of the natural gas guns 3 includes a first ventilation pipe 17 and a second ventilation pipe 18 arranged along the second direction, the first ventilation pipe 17 is connected to the first pipe 14, the second pipe 15 at one end away from the third through hole 13, the second ventilation pipe 18 is connected to the natural gas nozzle 4, the inner wall of the first ventilation pipe 17 is provided with a first thread, the outer wall of the second ventilation pipe 18 is provided with a second thread, and the diameter of the second ventilation pipe 18 is smaller than the diameter of the first ventilation pipe 17, and the first ventilation pipe 17 and the second ventilation pipe 18 are threadedly connected.

[0058] Specifically, in this embodiment, Figure 3 As shown, each of the natural gas guns 3 includes a first ventilation pipe 17 and a second ventilation pipe 18 arranged along the second direction, the first ventilation pipe 17 is connected to one end of the first pipeline 14 and the second pipeline 15 away from the third through hole 13, the second ventilation pipe 18 is connected to the natural gas nozzle 4, a first thread is provided on the inner wall of the first ventilation pipe 17, and a second thread is provided on the outer wall of the second ventilation pipe 18, the diameter of the second ventilation pipe 18 is smaller than the diameter of the first ventilation pipe 17, one end of the second ventilation pipe 18 can be extended into the interior of the first ventilation pipe 17 and is threadedly connected to the first ventilation pipe 17, an auxiliary nut is also provided on the outside of the second ventilation pipe 18, the auxiliary nut is sleeved on the outside of the second ventilation pipe 18, and is fixedly connected to the second ventilation pipe 18, when the second ventilation pipe 18 rotates, the auxiliary nut is used to drive the second ventilation pipe 18 to rotate, so as to increase the speed of connection between the first ventilation pipe 17 and the second ventilation pipe 18, so as to facilitate installation by operators.

[0059] Furthermore, the natural gas nozzle 4 includes a connecting portion 404 arranged on the side of the first flame spraying portion 401 away from the second flame spraying portion 402, the connecting portion 404 is sleeved on the outside of the second ventilation pipe 18 and is threadedly connected thereto, an end plate 19 is provided at one end of the second ventilation pipe 18 and in the connecting portion 404, a frustum-shaped fourth through hole 20 is provided in the middle of the end plate 19, and the fourth through hole 20 is used to adjust the flow rate of the natural gas sprayed from the second ventilation pipe 18.

[0060] Specifically, in this embodiment, Figure 5 and Figure 6 As shown, the natural gas nozzle 4 also includes a connecting portion 404, which is arranged on a side of the first flame spraying portion 401 away from the second flame spraying portion 402, and the connecting portion 404 is provided with a thread inside and is sleeved on the outside of one end of the second ventilation pipe 18 and is threadedly connected thereto, and an end plate 19 is provided inside the connecting portion 404, and one end of the end plate 19 abuts against one end of the second ventilation pipe 18, and a frustum-shaped fourth through hole 20 is provided in the middle of the end plate 19, and the large-diameter end of the fourth through hole 20 is arranged toward the first flame spraying portion 401, and the small-diameter end of the fourth through hole 20 is arranged away from the first flame spraying portion 401, and the fourth through hole 20 is used to adjust the natural gas flow rate flowing from the second ventilation pipe 18 to the natural gas nozzle 4, thereby indirectly realizing the amount of flame sprayed from the natural gas nozzle 4.

[0061] Furthermore, the natural gas grading gun structure also includes a fastening bolt 21 . A plurality of fifth through holes 211 are circumferentially provided on the connecting portion 404 . One end of the fastening bolt 21 enters from the fifth through hole 211 and abuts against the outer wall of the second ventilation pipe 18 .

[0062] Specifically, in this embodiment, Figure 5 As shown, the natural gas grading gun structure also includes a fastening bolt 21. A plurality of fifth through holes 211 are circumferentially provided on the connecting portion 404. One end of the fastening bolt 21 enters from the fifth through hole and abuts against the outer wall of the second ventilation pipe 18. After the connecting portion 404 is installed on the outside of the second ventilation pipe 18, the fastening bolt 21 can be used to further enhance the stability of the connection between the connecting portion 404 and the second ventilation pipe 18.

[0063] Working principle: During use, the natural gas coming in from the outside enters the annular cavity from the natural gas pipeline 2 through the first through hole, and enters each natural gas gun group through multiple second through holes on the annular inner wall 101, and enters the two natural gas guns 3 through the air intake assembly. Combined with the ignition device and the air distribution device, the combustion of the flame can be achieved. The burning flame is ejected from the flame nozzle 5 on the natural gas nozzle 4. When the air distribution device blows air into the first space, a large part of the wind will carry the flame to the inside of the second flame tube 9, and another small part of the wind will form a vortex flow due to the existence of the return plate 11. The formed vortex flow will carry part of the smoke out through the return port 6.

[0064] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and its core ideas of this application. The above is only the preferred implementation method of this application. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of this utility model, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the scope of protection of this application.

Claims

1. A natural gas grading gun structure, comprising an ignition device and an air distribution device used in conjunction with the natural gas grading gun, wherein the ignition device is used to ignite the natural gas in the natural gas grading gun, and the air distribution device is used to blow out the ignited natural gas, characterized in that: Also includes: A gas ring (1), wherein an annular cavity is formed in the gas ring (1), the gas ring (1) comprising an annular inner wall (101) and an annular outer wall (102), a first through hole being provided on the annular outer wall (102), the first through hole being connected to a natural gas pipeline (2), and a plurality of second through holes being provided circumferentially on the annular inner wall (101); A plurality of gas gun groups having the same number as the second through holes, each of the gas gun groups comprising two gas guns (3) arranged in a first direction and extending in a second direction, and also comprising an air intake assembly connecting the gas guns (3) with the second through holes, the first direction being perpendicular to the second direction; One end of the natural gas gun (3) away from the air intake assembly is connected to a natural gas nozzle (4), and a plurality of flame nozzles (5) are circumferentially arranged on the natural gas nozzle (4) around a first axis, the first axis being the axis of the natural gas nozzle (4) and extending along the second direction.

2. The natural gas grading gun structure according to claim 1, characterized in that: The natural gas nozzle (4) comprises a cylindrical first flame spraying portion (401) and a conical second flame spraying portion (402); the flame spray nozzle (5) is arranged on the first flame spraying portion (401); the large-diameter end of the second flame spraying portion (402) is connected to the first flame spraying portion (401); the small-diameter end of the second flame spraying portion (402) is closed; and a plurality of second flame spraying ports (403) are arranged on the side wall of the second flame spraying portion (402) around the first axis.

3. The natural gas grading gun structure according to claim 2, characterized in that: The natural gas grading gun structure further comprises a flame tube assembly connected to the gas ring (1), a first space being formed inside the flame tube assembly, the natural gas gun group being located in the first space, the flame tube assembly comprising a first section (6) in a frustum shape, the large-diameter end of the first section (6) being arranged away from the gas ring (1), and a return port (601) communicating with the outside being arranged in the circumferential direction of the side wall of the first section (6).

4. The natural gas grading gun structure according to claim 3, characterized in that: The flame tube assembly further comprises a first flame tube (7) connected to the gas ring (1); an end of the first flame tube (7) away from the gas ring (1) is connected to a flange (8); the flange (8) is connected to the small-diameter end of the first section (6); and the large-diameter end of the first section (6) is connected to a second flame tube (9).

5. The natural gas staging gun structure according to claim 4, characterized in that: A fixing plate (10) is also provided in the first space, a plurality of first fixing portions (103) are provided on the outer edge of the fixing plate (10) in a circumferential direction, a first mounting hole is provided in the middle of the fixing plate (10), a return plate (11) is provided in the first mounting hole, the return plate (11) is provided at a position relatively close to the outer edge and corresponding to the first fixing portion (103), a plurality of second fixing portions (104) are provided, the number of which is the same as the number of the first fixing portions (103), a second mounting hole is provided in the middle of the return plate (11), and the return plate (11) comprises: A support portion (105) disposed in the second mounting hole, and a plurality of reflux portions (106) circumferentially disposed on the outer edge of the support portion (105), wherein a plane where the reflux portion (106) is located forms an angle with a plane where the fixing plate (10) is located, an end of the reflux portion (106) away from the support portion (105) is connected to an inner edge of the fixing plate (10), and the support portion (105) and the fixing plate (10) are coaxial and located in the same plane; One end of one of the gas guns (3) that is relatively close to the gas nozzle (4) is located in the first fixing portion (103), and another end of the gas gun (3) that is relatively close to the gas nozzle (4) is located in the second fixing portion (104); The air distribution device is located on one side of the gas ring (1) and has a fixed shaft, the fixed shaft extends into the first space and is connected to the support portion (105). Under the action of the air distribution device, the return plate (11) is used to send part of the smoke generated when the natural gas is burned to the second flame outlet (403).

6. The natural gas staging gun structure according to claim 5, characterized in that: The air intake assembly comprises a connecting plate (12) connected to the annular inner wall (101); a third through hole (13) is formed in the middle of the connecting plate (12); the third through hole (13) is communicated with the second through hole; the air intake assembly further comprises a first pipe (14) connected to one of the natural gas guns (3); and a second pipe (15) connected to the other natural gas gun (3); the first pipe (14) and the second pipe (15) are both communicated with the third through hole (13).

7. The natural gas staging gun structure according to claim 6, characterized in that: A graphite gasket (16) is also provided between the connecting plate (12) and the annular inner wall (101), and an air hole is provided on the graphite gasket (16) for connecting the first through hole with the third through hole (13).

8. The natural gas staging gun structure according to claim 7, characterized in that: Each of the natural gas guns (3) comprises a first ventilation pipe (17) and a second ventilation pipe (18) arranged along the second direction, the first ventilation pipe (17) being connected to the first pipe (14) and the second pipe (15) at one end away from the third through hole (13), the second ventilation pipe (18) being connected to the natural gas nozzle (4), the inner wall of the first ventilation pipe (17) being provided with a first thread, the outer wall of the second ventilation pipe (18) being provided with a second thread, the diameter of the second ventilation pipe (18) being smaller than the diameter of the first ventilation pipe (17), and the first ventilation pipe (17) and the second ventilation pipe (18) being threadedly connected.

9. The natural gas staging gun structure according to claim 8, characterized in that: The natural gas nozzle (4) comprises a connecting portion (404) arranged on a side of the first flame spraying portion (401) away from the second flame spraying portion (402); the connecting portion (404) is sleeved on the outside of the second ventilation pipe (18) and connected thereto; an end plate (19) is arranged at one end of the second ventilation pipe (18) and inside the connecting portion (404); a fourth through hole (20) in the shape of a cone is arranged in the middle of the end plate (19); the fourth through hole (20) is used to adjust the flow rate of the natural gas sprayed from the second ventilation pipe (18).

10. The natural gas staging gun structure according to claim 9, characterized in that: The natural gas grading gun structure also includes a fastening bolt (21), and a plurality of fifth through holes (211) are circumferentially provided on the connecting portion (404). One end of the fastening bolt (21) enters through the fifth through hole (211) and abuts against the outer wall of the second ventilation pipe (18).

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