An external firearm

Abstract

The present invention provides an external fire separator, comprising an annular outer fire ring provided with an external ejection tube hole, an outer fire cover seat placed on the outer fire ring, and an annular outer fire cover seat placed on the outer fire cover seat. The outer fire cover is formed by an annular top surface, an oblique annular inner surface, an annular air inlet surface, and an oblique annular outer surface, which are connected and surrounded in sequence. The inner surface is inclined from the inner upper surface to the outer lower surface, and the outer surface is inclined from the outer upper surface to the inner lower surface. The outer fire cover is evenly provided with a plurality of truncated cone-shaped fire cover holes with a diameter gradually decreasing from top to bottom. The small fire cover is in the shape of a truncated cone with a diameter gradually decreasing from top to bottom. The side of each small fire cover is provided with a plurality of external fire grooves passing through the upper and lower bottom surfaces of the small fire cover. A small fire cover is placed in each fire cover hole, thereby reducing the material cost and processing cost of the external fire separator and improving the combustion efficiency. When the external fire separator burns, multiple groups of flame rings are formed on the outer fire cover, so that the pot placed thereon is heated more evenly and the heating efficiency is improved.

Description

[0001] The present invention relates to kitchenware, in particular to an external fire-dispensing device. Background Art

[0002] The external ignition coil is a crucial component of gas cookers, and its performance directly impacts the quality of the cooker. Existing external ignition coils are typically made of copper, either cast or forged. This is costly, and the burner holes are difficult to machine, resulting in rough holes and low combustion efficiency, impacting the performance and quality of the cooker.

[0003] The external fire-distributing device of the prior art usually forms a group of flame circles on the outer fire cover during combustion, so that the pots and pans placed thereon are not heated uniformly and the heating efficiency is not high enough. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides an external fire divider. The present invention provides an external fire divider, comprising an annular outer fire ring with an outer ejector tube hole, an outer fire cover seat placed on the outer fire ring, and an annular outer fire cover seat placed on the outer fire cover seat. The outer fire cover is formed by an annular top surface, an oblique annular inner surface, an annular air inlet surface, and an oblique annular outer surface, the inner surface being inclined from the inner upper surface to the outer lower surface, and the outer surface being inclined from the outer upper surface to the inner lower surface. The outer fire cover is evenly provided with a plurality of truncated cone-shaped fire cover holes with a diameter gradually decreasing from top to bottom, and the small fire cover is truncated cone-shaped with a diameter gradually decreasing from top to bottom. The side of each small fire cover is provided with a plurality of external fire grooves extending through the upper and lower bottom surfaces of the small fire cover, and each fire cover hole is provided with a small fire cover. This reduces the material cost and processing cost of the external fire divider and improves combustion efficiency. When the external fire divider burns, multiple groups of flame circles are formed on the outer fire cover, so that the pot placed thereon is heated more evenly and the heating efficiency is improved.

[0005] The technical solution to the technical problem solved by the present invention is: an external fire-distributing device, comprising an annular outer fire ring provided with an external ejection tube hole, an outer fire cover seat placed on the outer fire ring, and an annular outer fire cover placed on the outer fire cover seat, the outer fire cover being connected and surrounded in sequence by an annular top surface, an oblique annular inner surface, an annular air intake surface, and an oblique annular outer surface, the inner surface being inclined from the inner upper side (the directions of upper, lower, front, rear, inner, and outer described in this application refer to the directions indicated after the product is installed) to the outer lower side, and the outer side being inclined from the outer upper side to the inner lower side. The outer fire cover is evenly provided with a number of frustum-shaped fire cover holes with diameters gradually decreasing from top to bottom, and the small fire cover is frustum-shaped with diameters gradually decreasing from top to bottom. The side of each small fire cover is provided with a number of outer fire grooves running through the upper bottom surface and the lower bottom surface of the small fire cover. A small fire cover is placed in each fire cover hole, and the side surface of the small fire cover is tightly attached to the hole wall of the fire cover hole. A number of outgoing air holes are formed between the upper bottom surface and the top surface of each small fire cover.

[0006] The outer fire cover seat at least includes an annular air intake ring, an inner bevel connected to the inner edge of the air intake ring, an outer bevel connected to the outer edge of the air intake ring, an annular outer seat inner wall connected to the inner upper edge of the inner bevel, and an annular outer seat outer wall connected to the outer upper edge of the outer bevel. The inner bevel is inclined from the inner upper to the outer lower, and the outer bevel is inclined from the outer upper to the inner lower, and the air intake ring is evenly provided with a number of air intake holes.

[0007] When the outer fire cover is placed on the outer fire cover seat, the inner surface is in close contact with the inner inclined surface, and the outer surface is in close contact with the outer inclined surface. There is an appropriate gap between the lower edge of the air intake surface and the air intake ring.

[0008] Furthermore, the outer fire ring is provided with an outer ring groove and an inner ring groove. When the outer fire cover is placed on the outer fire ring, the lower end of the outer seat outer wall falls into the outer ring groove, and the lower end of the outer seat inner wall falls into the inner ring groove.

[0009] Furthermore, the outer fire ring, outer fire cover seat, outer fire large cover and small fire cover are made of stainless steel.

[0010] Furthermore, a plurality of brackets are fixedly connected to the bottom of the outer fire ring, and their function is to place the outer fire ring on the secondary air partition plate of the burner when assembling the burner with the outer fire distributor, so that the outer fire ring maintains an appropriate distance from the secondary air partition plate.

[0011] In an embodiment of the present technical solution, the gas flows from the outlet end of the outer ejector tube passing through the outer ejector tube hole into the cavity surrounded by the outer fire ring, the outer wall of the outer seat, the air intake ring and the inner wall of the outer seat, passes through the several air intake holes and flows into the cavity between the air intake ring and the air intake surface, and then passes through the hole walls of several of the fire cover holes and the outer fire groove between the small fire cover, and flows out from several groups of outer exhaust holes.

[0012] The technical solution to the technical problem solved by the present invention also includes: an external fire distributor, comprising an annular outer fire ring provided with an external ejection tube hole and an outer fire cover seat placed on the outer fire ring, the outer fire cover seat comprising a top wall, an annular outer seat inner wall connected to the inner edge of the top wall, and an annular outer seat outer wall connected to the outer edge of the top wall, the top wall is provided with a plurality of frustum-shaped fire cover holes with a diameter gradually decreasing from top to bottom, the small fire cover is in the shape of a frustum with a diameter gradually decreasing from top to bottom, the side of each small fire cover is provided with a plurality of external fire grooves passing through the upper bottom surface and the lower bottom surface of the small fire cover, each fire cover hole is placed with a small fire cover, the side of the small fire cover is tightly attached to the hole wall of the fire cover hole, and a plurality of outgoing air holes are formed between the upper bottom surface of each small fire cover and the top wall.

[0013] Furthermore, the outer fire ring is provided with an outer ring groove and an inner ring groove. When the outer fire cover is placed on the outer fire ring, the lower end of the outer seat outer wall falls into the outer ring groove, and the lower end of the outer seat inner wall falls into the inner ring groove.

[0014] Furthermore, the outer fire ring, outer fire cover seat and small fire cover are made of stainless steel.

[0015] Furthermore, a plurality of brackets are fixedly connected to the bottom of the outer fire ring, and their function is to place the outer fire ring on the secondary air partition plate of the burner when assembling the burner with the outer fire distributor, so that the outer fire ring maintains an appropriate distance from the secondary air partition plate.

[0016] In an embodiment of the present technical solution, the gas flows from the gas outlet end of the external ejector tube passing through the external ejector tube hole into the cavity surrounded by the outer fire ring, the outer wall of the outer seat, the top wall and the inner wall of the outer seat, and then passes through several gas outlet pipes surrounded by the hole walls of the fire cover hole and the outer fire groove, and flows out from several external gas holes.

[0017] The technical solution to the technical problem solved by the present invention also includes: an external fire-distributing device, comprising an annular outer fire ring provided with an external ejection tube hole and an outer fire cover seat placed on the outer fire ring, the outer fire cover seat comprising a top wall, an annular outer seat inner wall connected to the inner edge of the top wall, and an annular outer seat outer wall connected to the outer edge of the top wall, the top wall is provided with a plurality of frustum-shaped fire cover holes with diameters gradually decreasing from top to bottom, the small fire cover is in the shape of a frustum with diameters gradually decreasing from top to bottom, the hole wall of each fire cover hole is provided with a plurality of external fire grooves running through the upper and lower sides of the top wall, a small fire cover is placed in each fire cover hole, the side of the small fire cover is in close contact with the hole wall of the fire cover hole, and a plurality of outgoing air holes are formed between the upper bottom surface of each small fire cover and the top wall.

[0018] Furthermore, the outer fire ring is provided with an outer ring groove and an inner ring groove. When the outer fire cover is placed on the outer fire ring, the lower end of the outer seat outer wall falls into the outer ring groove, and the lower end of the outer seat inner wall falls into the inner ring groove.

[0019] Furthermore, the outer fire ring, outer fire cover seat and small fire cover are made of stainless steel.

[0020] Furthermore, the lower edge of the top wall is integrally connected to a number of truncated conical short tubes that are larger at the top and smaller at the bottom. The tube holes of the truncated conical short tubes are part of the fire cover holes, and a part of the outer fire trough is located on the tube wall of the truncated conical short tubes. The function of the truncated conical short tubes is to make the top wall thinner and reduce material costs.

[0021] Furthermore, a plurality of brackets are fixedly connected to the bottom of the outer fire ring, and their function is to place the outer fire ring on the secondary air partition plate of the burner when assembling the burner with the outer fire distributor, so that the outer fire ring maintains an appropriate distance from the secondary air partition plate.

[0022] In an embodiment of the present technical solution, the gas flows from the gas outlet end of the outer ejector tube passing through the outer ejector tube hole into the cavity surrounded by the outer fire ring, the outer wall of the outer seat, the top wall and the inner wall of the outer seat, and then passes through several gas outlet pipes surrounded by the side walls of the small fire cover and the outer fire groove, and flows out from several external gas holes.

[0023] The beneficial effects of the present invention are that the outer fire ring, outer fire cover seat, small fire cover, etc. in the present invention are all made of stainless steel, which reduces material cost and processing cost and improves combustion efficiency; compared with the burner in the prior art, the burner made of the external fire distributor of the present invention forms more groups of flame rings on the outer fire cover, so that the heated object is heated more evenly and the combustion efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a stereoscopic diagram of Example 1 of the present invention.

[0025] Figure 2 This is a stereoscopic diagram of embodiment 1 of the present invention.

[0026] Figure 3 This is an exploded view of Example 1 of the present invention.

[0027] Figure 4 It is a sectional stereoscopic view of a large fire cover 1 in the embodiment of the present invention.

[0028] Figure 5 It is a three-dimensional diagram of the small and medium fire cover 201 in embodiments 1 and 2 of the present invention.

[0029] Figure 6 A three-dimensional diagram of the burner assembled according to Example 1 of the present invention.

[0030] Figure 7 for Figure 6 A magnified view of the middle panel.

[0031] Figure 8 This is an exploded view of the burner assembled in Example 1 of the present invention.

[0032] Figure 9 、 10 This is an exploded view of Example 2 of the present invention.

[0033] Figure 11 、 12 This is an exploded view of the burner assembled in Example 2 of the present invention.

[0034] Figure 13 、 14This is an exploded view of Example 3 of the present invention.

[0035] Figure 15 This is a three-dimensional diagram of the burner assembled in Example 3 of the present invention.

[0036] Figure 16 for Figure 15 Magnified view of B.

[0037] Figure 17 、 18 This is an exploded view of the burner assembled in Example 3 of the present invention.

[0038] In the figure: 1, outer fire cover, 2, ignition needle, 3, inner fire cover, 4, thermocouple, 5, secondary air partition plate, 6, burner base, 7, center nozzle, 8, mounting plate, 9, outer nozzle, 10, outer ring groove, 11, inner ring groove, 14, outer ejector tube outlet, 18, outer fire ring, 181, outer ejector tube hole, 201, small fire cover, 202, fire cover hole, 203, outer fire groove, 204, outer seat inner wall, 205, outer seat outer wall, 206, outgoing air hole, 207, truncated cone short tube, 213, air inlet, 214, inner bevel, 215, outer bevel, 229, air inlet ring, 301, top surface, 302, outside, 303, air inlet surface, 304, inside surface, 401, top wall. DETAILED DESCRIPTION

[0039] Example 1: An external fire-distributing device, comprising an annular outer fire ring 18 provided with an external ejection tube hole 181, an outer fire cover seat placed on the outer fire ring 18, and an annular outer fire cover 1 placed on the outer fire cover seat, the outer fire cover 1 being connected and surrounded in sequence by an annular top surface 301, an oblique annular inner surface 304, an annular air inlet surface 303 and an oblique annular outer surface 302, the inner surface 304 being inclined from the inner upper side to the outer lower side, and the outer surface 302 being inclined from the outer upper side to the inner lower side. The outer fire cover 1 is evenly provided with a number of frustum-shaped fire cover holes 202 with diameters gradually decreasing from top to bottom. The small fire cover 201 is in the shape of a frustum with diameters gradually decreasing from top to bottom. The side of each small fire cover 201 is provided with a number of outer fire grooves 203 that pass through the upper bottom surface and the lower bottom surface of the small fire cover 201. A small fire cover 201 is placed in each fire cover hole 202. The side of the small fire cover 201 is tightly attached to the hole wall of the fire cover hole 202. A number of outgoing air holes 206 are formed between the upper bottom surface of each small fire cover 201 and the top surface 301.

[0040] The outer fire cover seat at least includes an annular air intake ring 229, an inner bevel 214 connected to the inner edge of the air intake ring 229, an outer bevel 215 connected to the outer edge of the air intake ring 229, an annular outer seat inner wall 204 connected to the inner upper edge of the inner bevel 214, and an annular outer seat outer wall 205 connected to the outer upper edge of the outer bevel 215. The inner bevel 214 is inclined from the inner upper to the outer lower, and the outer bevel 215 is inclined from the outer upper to the inner lower. The air intake ring 229 is evenly provided with a number of air intake holes 213.

[0041] When the outer fire cover 1 is placed on the outer fire cover seat, the inner surface 304 is in close contact with the inner inclined surface 214, and the outer surface 302 is in close contact with the outer inclined surface 215. There is an appropriate gap between the lower edge of the air inlet surface 303 and the air inlet ring 229.

[0042] Furthermore, the outer fire ring 18 is provided with an outer ring groove 10 and an inner ring groove 11. When the outer fire cover is placed on the outer fire ring 18, the lower end of the outer seat outer wall 205 falls into the outer ring groove 10, and the lower end of the outer seat inner wall 204 falls into the inner ring groove 11.

[0043] Furthermore, the outer fire ring 18, the outer fire cover seat, the outer fire large cover 1 and the small fire cover 201 are made of stainless steel.

[0044] Furthermore, a plurality of brackets 36 are fixedly connected to the bottom of the outer fire ring 18. When the burner is assembled with the outer fire distributor, the outer fire ring 18 is placed on the secondary air partition plate 5 of the burner head, so that the outer fire ring 18 maintains an appropriate distance from the secondary air partition plate 5 to form an air inlet.

[0045] In an embodiment of the present technical solution, the gas flows from the outlet end of the external ejector tube through the external ejector tube hole 181 into the cavity surrounded by the outer fire ring 18, the outer wall 205 of the outer seat, the air intake ring and the inner wall 204 of the outer seat, passes through the several air intake holes 213 and flows into the cavity between the air intake ring 229 and the air intake surface 303, and then passes through the outer fire grooves 203 between the hole walls of the several small fire covers 201 and the fire cover holes 202, and flows out from several groups of external air holes 206.

[0046] Example 2: An external fire-distributing device, comprising an annular outer fire ring 18 having an outer ejection tube hole 181 and an outer fire cover seat placed on the outer fire ring 18, the outer fire cover seat comprising a top wall 401, an annular outer seat inner wall 204 integrally connected to the inner edge of the top wall 401, and an annular outer seat outer wall 205 integrally connected to the outer edge of the top wall 401, the top wall 401 being provided with a plurality of frustum-shaped fire cover holes 202 of gradually decreasing diameter from top to bottom. The small fire cover 201 is in the shape of a truncated cone with a diameter gradually decreasing from top to bottom. The side of each small fire cover 201 is provided with a plurality of external fire grooves 203 that pass through the upper bottom surface and the lower bottom surface of the small fire cover 201. Each fire cover hole 202 is placed with a small fire cover 201. The side of the small fire cover 201 is tightly attached to the hole wall of the fire cover hole 202, and a plurality of outgoing air holes 206 are formed between the upper bottom surface of each small fire cover 201 and the top wall 401.

[0047] Furthermore, the outer fire ring 18 is provided with an outer ring groove 10 and an inner ring groove 11. When the outer fire cover is placed on the outer fire ring 18, the lower end of the outer seat outer wall 205 falls into the outer ring groove 10, and the lower end of the outer seat inner wall 204 falls into the inner ring groove 11.

[0048] Furthermore, the outer fire ring 18, the outer fire cover seat and the small fire cover 201 are made of stainless steel.

[0049] Furthermore, a plurality of brackets 36 are fixedly connected to the bottom of the outer fire ring 18. When the burner is assembled with the outer fire distributor, the outer fire ring 18 is placed on the secondary air partition plate 5 of the burner head, so that the outer fire ring 18 maintains an appropriate distance from the secondary air partition plate 5 to form an air inlet.

[0050] In an embodiment of the present technical solution, the gas flows from the gas outlet end of the external ejector tube passing through the external ejector tube hole 181 into the cavity surrounded by the outer fire ring 18, the outer wall 205 of the outer seat, the top wall 401 and the inner wall 204 of the outer seat, and then passes through several gas outlet pipes surrounded by the hole walls of the fire cover hole 202 and the outer fire groove 203, and flows out from several groups of external gas holes 206.

[0051] Example 3: An external fire-distributing device, comprising an annular outer fire ring 18 provided with an outer ejection tube hole 181 and an outer fire cover seat placed on the outer fire ring 18, the outer fire cover seat comprising a top wall 401, an annular outer seat inner wall 204 integrally connected to the inner edge of the top wall 401, and an annular outer seat outer wall 205 integrally connected to the outer edge of the top wall 401, the top wall 401 is provided with a plurality of frustum-shaped fire cover holes 202 with diameters gradually decreasing from top to bottom, the small fire cover 201 is in the shape of a frustum with diameters gradually decreasing from top to bottom, the hole wall of each fire cover hole 202 is provided with a plurality of outer fire grooves 203 running through the upper and lower sides of the top wall 401, each fire cover hole 202 is placed with a said small fire cover 201, the side surface of the said small fire cover 201 is tightly attached to the hole wall of the said fire cover hole 202, and a plurality of outgoing air holes 206 are formed between the upper bottom surface of each said small fire cover 201 and the top wall 401.

[0052] Furthermore, the outer fire ring 18 is provided with an outer ring groove 10 and an inner ring groove 11. When the outer fire cover is placed on the outer fire ring 18, the lower end of the outer seat outer wall 205 falls into the outer ring groove 10, and the lower end of the outer seat inner wall 204 falls into the inner ring groove 11.

[0053] Furthermore, the outer fire ring 18, the outer fire cover seat and the small fire cover 201 are made of stainless steel.

[0054] Furthermore, the lower edge of the top wall 401 is integrally connected to a number of truncated conical short tubes 207 that are larger at the top and smaller at the bottom. The tube hole of the truncated conical short tube 207 is part of the fire cover hole 202, and a part of the outer fire groove 203 is located on the tube wall of the truncated conical short tube 207. The function of the truncated conical short tube 207 is to make the top wall 401 thinner and reduce material costs.

[0055] Furthermore, a plurality of brackets 36 are fixedly connected to the bottom of the outer fire ring 18. When the burner is assembled with the outer fire distributor, the outer fire ring 18 is placed on the secondary air partition plate 5 of the burner head, so that the outer fire ring 18 maintains an appropriate distance from the secondary air partition plate 5 to form an air inlet.

[0056] In an embodiment of the present technical solution, the gas flows into the cavity surrounded by the outer fire ring 18, the outer wall 205 of the outer seat, the top wall 401 and the inner wall 204 of the outer seat from the gas outlet end of the outer ejector tube passing through the outer ejector tube hole 181, and then passes through several gas outlet pipes surrounded by the side walls of the small fire cover 201 and the outer fire groove 203, and flows out from several groups of external gas holes 206.

Claims

1. An external firearm, characterized in that: The invention comprises an annular outer fire ring (18) provided with an outer ejection tube hole (181), an outer fire cover seat placed on the outer fire ring (18) and an annular outer fire cover (1) placed on the outer fire cover seat, wherein the outer fire cover (1) is connected and surrounded by an annular top surface (301), an oblique annular inner surface (304), an annular air inlet surface (303) and an oblique annular outer surface (302) in sequence, wherein the inner surface (304) is inclined from the inner upper side to the outer lower side, and the outer surface (302) is inclined from the outer upper side to the inner lower side, and the outer fire cover (1) is evenly provided with a plurality of truncated cone-shaped fire cover holes (202) with a diameter gradually decreasing from top to bottom, and the small fire cover (201) is in the shape of a truncated cone with a diameter gradually decreasing from top to bottom, and the side of each small fire cover (201) is provided with a plurality of outer fire grooves (203) running through the upper bottom surface and the lower bottom surface of the small fire cover, and each fire cover hole (202) is A small fire cover (201) is placed, and the side surface of the small fire cover (201) is tightly attached to the hole wall of the fire cover hole (202). A plurality of outgoing air holes (206) are formed between the upper bottom surface of each small fire cover (201) and the top surface (301). The outer fire cover seat at least includes an annular air intake ring (229), an inner bevel (214) connected to the inner edge of the air intake ring (229), an outer bevel (215) connected to the outer edge of the air intake ring (229), an annular outer seat inner wall (204) connected to the inner upper edge of the inner bevel (214), and an annular outer seat outer wall (205) connected to the outer upper edge of the outer bevel (215). The inner bevel (214) is inclined from the inner upper side to the outer lower side. The outer inclined surface (215) is inclined from the outer upper direction to the inner lower direction, and the air intake ring (229) is evenly provided with a plurality of air intake holes (213). When the outer fire cover (1) is placed on the outer fire cover seat, the inner surface (304) is in close contact with the inner inclined surface (214), and the outer surface (302) is in close contact with the outer inclined surface (215). There is an appropriate gap between the lower edge of the air intake surface (303) and the air intake ring (229).

2. An external firearm according to claim 1, characterized in that: The outer fire ring (18) is provided with an outer ring groove (10) and an inner ring groove (11); when the outer fire cover is placed on the outer fire ring (18), the lower end of the outer seat outer wall (205) falls into the outer ring groove (10), and the lower end of the outer seat inner wall (204) falls into the inner ring groove (11).

3. An external firearm according to claim 1 or 2, characterized in that: The outer fire ring (18), the outer fire cover seat, the outer fire large cover (1) and the small fire cover (201) are made of stainless steel.

4. An external firearm, characterized in that: The invention comprises an annular outer fire ring (18) provided with an outer ejection tube hole (181) and an outer fire cover seat placed on the outer fire ring (18), wherein the outer fire cover seat comprises a top wall (401), an annular outer seat inner wall (204) connected to the inner edge of the top wall (401) and an annular outer seat outer wall (205) connected to the outer edge of the top wall (401), the top wall (401) is provided with a plurality of frustum-shaped fire cover holes (202) with diameters gradually decreasing from top to bottom, a small fire cover (20 1) It is in the shape of a truncated cone with a diameter gradually decreasing from top to bottom, and the side of each small fire cover (201) is provided with a plurality of external fire grooves (203) penetrating the upper bottom surface and the lower bottom surface of the small fire cover (201), and each fire cover hole (202) is provided with a small fire cover (201), and the side of the small fire cover (201) is tightly attached to the hole wall of the fire cover hole (202), and a plurality of outgoing air holes (206) are formed between the upper bottom surface of each small fire cover (201) and the top wall (401).

5. An external firearm according to claim 4, characterized in that: The outer fire ring (18) is provided with an outer ring groove (10) and an inner ring groove (11); when the outer fire cover is placed on the outer fire ring (18), the lower end of the outer seat outer wall (205) falls into the outer ring groove (10), and the lower end of the outer seat inner wall (204) falls into the inner ring groove (11).

6. An external firearm according to claim 4 or 5, characterized in that: The outer fire ring (18), the outer fire cover seat and the small fire cover (201) are made of stainless steel.

7. An external firearm, characterized in that: The invention comprises an annular outer fire ring (18) provided with an outer ejection tube hole (181) and an outer fire cover seat placed on the outer fire ring (18), wherein the outer fire cover seat comprises a top wall (401), an annular outer seat inner wall (204) integrally connected to the inner edge of the top wall (401), and an annular outer seat outer wall (205) integrally connected to the outer edge of the top wall (401), wherein the top wall (401) is provided with a plurality of frustum-shaped fire cover holes (202) whose diameters gradually decrease from top to bottom, a small fire cover ( 201) is in the shape of a truncated cone with a diameter gradually decreasing from top to bottom, and the hole wall of each fire cover hole (202) is provided with a plurality of external fire grooves (203) running through the upper and lower sides of the top wall (401), and each fire cover hole (202) is placed with a small fire cover (201), and the side surface of the small fire cover (201) is tightly attached to the hole wall of the fire cover hole (202), and a plurality of outgoing air holes (206) are formed between the upper bottom surface of each small fire cover (201) and the top wall (401).

8. An external firearm according to claim 7, characterized in that: The outer fire ring (18) is provided with an outer ring groove (10) and an inner ring groove (11); when the outer fire cover is placed on the outer fire ring (18), the lower end of the outer seat outer wall (205) falls into the outer ring groove (10), and the lower end of the outer seat inner wall (204) falls into the inner ring groove (11).

9. An external firearm according to claim 7 or 8, characterized in that: The outer fire ring (18), the outer fire cover seat and the small fire cover (201) are made of stainless steel.

10. An external firearm according to claim 7 or 8, characterized in that: The lower edge of the top wall (401) is integrally connected to a plurality of truncated cone-shaped short tubes (207) that are larger at the top and smaller at the bottom. The tube holes of the truncated cone-shaped short tubes (207) are part of the fire cover hole (202), and a part of the outer fire groove (203) is located on the tube wall of the truncated cone-shaped short tube (207).

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