Combined cutting torch of cutting gun

Abstract

The utility model discloses a combined type cutting torch of a cutting gun, and relates to the technical field of cutting guns, in particular to the combined type cutting torch of the cutting gun, which comprises an inner torch, an air guide mechanism, an outer sleeve, a heat dissipation groove channel, an air guide cavity channel, a sealing baffle ring, a clamping ring block, a sealing ring, a containing groove and an air outlet hole, the outer sleeve is arranged outside the inner torch, and the air guide mechanism is arranged at the bottom of the inner torch. A heat dissipation groove channel is formed in the bottom end of the outer portion of the outer sleeve, an air guide cavity channel is formed in the inner nozzle, a sealing baffle ring is arranged outside the inner nozzle, a clamping ring block is arranged outside the inner nozzle, a sealing ring is arranged at the upper end of the outer portion of the outer sleeve, and a containing groove and an air outlet hole are formed in the upper portion and the lower portion of the interior of the outer sleeve respectively. Compared with the prior art, the cutting gun has the advantages that accessories are convenient to replace, the maintenance cost is reduced, the air injection position cannot be blocked, and tempering in the cutting gun cannot be caused.

Description

Technical Field

[0001] The utility model relates to the technical field of cutting torches, in particular to a combined cutting torch nozzle. Background Art

[0002] A cutting torch is a tool with a valve for gas cutting. It is shaped like a gun and has a nozzle at the front end. It is also called a cutting torch. Generally, a cutting torch has three switches. The top one is the high-pressure oxygen switch, which is commonly known as the high-wind switch; the mixed gas switch is below the high-wind switch; the last switch is the acetylene switch. The nozzle is a component placed at the front end of the cutting torch for mixing gases.

[0003] An improved flame cutting torch nozzle described in the publication number CN211162325U includes a cutting torch nozzle body. The top of the cutting torch nozzle body is connected with an adjusting protection frame through a telescopic sleeve. A compression spring is installed inside the telescopic sleeve, and a telescopic rod is fixed inside the compression spring. Mixed gas diversion pipes penetrate through the four circumferences inside the cutting torch nozzle body. One end of the mixed gas diversion pipe is fixed with a mixing chamber. During the use of the flame cutting torch nozzle, since the adjusting protection frame is located outside the air outlet channel and is higher than the air outlet channel, the adjusting protection frame can protect the flame cutting torch nozzle to prevent flame splashing, and the adjusting protection frame can be adjusted according to the telescopic sleeve, so that the adjusting protection frame can always protect the flame cutting torch nozzle, avoiding the situation of potential safety hazards during the use of the flame cutting torch nozzle.

[0004] Although the above cutting torch nozzle solves certain problems, it still has the following disadvantages:

[0005] (1) The nozzle is an integral part. When it is damaged, it needs to be replaced as a whole, resulting in a higher maintenance cost. Moreover, both oxygen and combustible gas need to be output through the same nozzle, making it more likely to be damaged.

[0006] (2) When the nozzle sprays combustible gas, there will be a flat contact between the gas outlet position of the nozzle and the cutting piece during combustion, which is likely to block the gas outlet, resulting in the phenomenon of backfire of the cutting torch. Content of the Utility Model

[0007] The purpose of the utility model is to provide a combined cutting torch nozzle.

[0008] To achieve the above purpose, the utility model is realized through the following technical solutions:

[0009] A combined cutting torch nozzle includes:

[0010] An inner nozzle, a gas guiding cavity is axially formed inside the inner nozzle. A sealing retaining ring is sleeved outside the inner nozzle, and the sealing retaining ring is fixedly connected to the inner nozzle. A clamping ring block is sleeved outside the inner nozzle, and the top end outside the clamping ring block is fixedly connected to the bottom end outside the sealing retaining ring;

[0011] An air guiding mechanism is provided at the bottom of the inner nozzle. The air guiding mechanism includes an air duct and a pressurizing air duct. The air ducts are evenly distributed and opened at the bottom outside of the inner nozzle. The pressurizing air duct is opened at the bottom end inside the inner nozzle, and the pressurizing air duct is connected to the inside of the air guiding cavity through connection.

[0012] An outer sleeve is sleeved outside the inner nozzle. A closing ring for cooperating with the sealing retaining ring is fixedly connected to the top end outside the outer sleeve. A receiving groove for cooperating with the clamping ring block is opened at the top inside the outer sleeve. An air outlet for cooperating with the bottom of the inner nozzle is opened at the bottom end outside the outer sleeve.

[0013] Air guiding grooves are evenly distributed and opened at the bottom end outside the outer sleeve. The inside and outside of the bottom end of the outer sleeve are connected through the inside of the air guiding grooves.

[0014] Further, the sealing retaining ring is fixedly connected to the inner nozzle, the clamping ring block is fixedly connected to the inner nozzle, the top end outside the clamping ring block is fixedly connected to the bottom end outside the sealing retaining ring, and the outer diameter of the clamping ring block is smaller than the outer diameter of the sealing retaining ring.

[0015] Further, an air guiding groove is opened on the outside of the inner nozzle, and the air guiding groove is located on the side of the clamping ring block away from the sealing retaining ring.

[0016] Further, the air guiding cavity is connected to the pressurizing air duct through a chamfer structure, and the inside of the outer sleeve is connected to the air outlet through a chamfer structure.

[0017] Further, a guiding inclined surface is provided on the outer edge of the top end outside the inner nozzle, and a sealing inclined surface is provided on the outer edge of the top end outside the sealing retaining ring. The guiding inclined surface and the sealing inclined surface both face away from the clamping ring block, and both the guiding inclined surface and the sealing inclined surface are 45° inclined surfaces.

[0018] Further, a plurality of air vent cavities are evenly distributed and opened at the top end outside the sealing retaining ring. The top end outside the sealing retaining ring is connected to the bottom end outside the clamping ring block through the inside of the air vent cavities.

[0019] Further, the outer diameters of the bottom outside of the inner nozzle and the bottom outside of the outer sleeve gradually decrease along the axial direction.

[0020] Further, the depth inside the air duct gradually deepens along the axial direction of the inner nozzle, and the bottom end inside the air duct is deeper than the top end.

[0021] The present utility model provides a combined cutting torch nozzle, which has the following beneficial effects:

[0022] (1) By being divided into an inner nozzle and an outer sleeve, the inner nozzle is used to convey oxygen, and the space between the outer sleeve and the inner nozzle is used to convey combustible gas. The two gases are conveyed through two different channels. If one of them fails, only the corresponding component needs to be replaced, which has a low cost and is less likely to be damaged.

[0023] (2) By providing a gas guiding groove at the position of the air outlet at the bottom end of the outer sleeve, there is a gap when the air outlet hole at the bottom end of the outer sleeve contacts the surface of the cutting member, which will not cause the air outlet hole to be blocked and avoid the phenomenon of backfire inside the cutting torch. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained based on the provided drawings.

[0025] Figure 1 is a three-dimensional Figure 1 .

[0026] Figure 2 is a three-dimensional Figure 2 .

[0027] Figure 3 is an exploded three-dimensional structure diagram of a combined cutting torch nozzle of the present invention.

[0028] Figure 4 is a three-dimensional partial structure Figure 1 .

[0029] Figure 5 is a three-dimensional partial structure Figure 2 .

[0030] Figure 6 is a three-dimensional partial structure Figure 3 .

[0031] Reference numerals in the drawings: 1, inner nozzle; 2, gas guiding mechanism; 201, air channel; 202, supercharging air channel; 3, outer sleeve; 4, gas guiding groove; 5, gas guiding cavity; 6, sealing retaining ring; 7, clamping ring block; 8, closing ring; 9, receiving groove; 10, air outlet hole; 11, air guiding groove; 12, guiding inclined surface; 13, sealing inclined surface; 14, ventilation cavity. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Exemplary embodiments will be described in detail herein, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. On the contrary, they are merely examples of devices consistent with some aspects of the present disclosure as detailed in the appended claims.

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0034] Embodiment 1:

[0035] As Figures 1 to 6 shown, this embodiment provides a combined cutting torch nozzle, including an inner nozzle 1, a gas guiding mechanism 2, an outer sleeve 3, a gas guiding groove 4, a gas guiding cavity 5, a sealing retaining ring 6, a clamping ring block 7, a closing ring 8, a receiving groove 9, and an air outlet hole 10 opened at the bottom end of the outer sleeve 3.

[0036] Among them, a long tubular cylindrical long tube serves as the inner nozzle 1. There is a gas guiding cavity 5 inside the inner nozzle 1. The outer edge at the lower end of the outer part of the inner nozzle 1 converges inward, so the outer bottom wall of the outer part of the inner nozzle 1 is inclined. At the bottom end inside the inner nozzle 1 is a pressurizing air passage 202 with an inner diameter smaller than that of the gas guiding cavity 5 inside the inner nozzle 1. The connection between the pressurizing air passage 202 and the gas guiding cavity 5 inside the inner nozzle 1 is connected through a chamfer provided to transition the hole passage from large to small from the gas guiding cavity 5 to the inside of the pressurizing air passage 202. A sealing retaining ring 6 is sleeved at a position above the outer part of the inner nozzle 1. The inner wall of the sealing retaining ring 6 is fixedly connected to the outer wall of the inner nozzle 1. A clamping ring block 7 is also sleeved on the outer part of the inner nozzle 1. The inner wall of the clamping ring block 7 is also fixedly connected to the outer wall of the inner nozzle 1, and the outer top end of the clamping ring block 7 is fixedly connected to the outer bottom end of the sealing retaining ring 6. The outer diameter of the clamping ring block 7 is smaller than the outer diameter of the sealing retaining ring 6, and a plurality of uniformly distributed ventilation cavities 14 (8 are taken as an example in this application) are opened at the upper end of the outer part of the sealing retaining ring 6. The lower end of the ventilation cavity 14 passes through the outer bottom end of the clamping ring block 7, so that the outer top end of the sealing retaining ring 6 and the outer bottom end of the clamping ring block 7 are connected through.

[0037] An outer sleeve 3 is sleeved outside the inner nozzle 1. An accommodation groove 9 is formed in the upper side of the inner wall of the outer sleeve 3. The clamping ring block 7 can be clamped inside the outer sleeve 3. A sealing ring 8 is fixedly connected to the outer top end of the outer sleeve 3. The outer diameter of the sealing ring 8 is the same as that of the sealing retaining ring 6. Through the clamping between the sealing retaining ring 6 and the sealing ring 8, the contact between the inner nozzle 1 and the outer sleeve 3 can be sealed.

[0038] A part of the upper part inside the outer sleeve 3 is uniform. After an accommodation groove 9 is formed in the upper end inside, the inner diameter at the accommodation groove 9 is larger than that at other positions. In order to fit the outer bottom end of the inner nozzle 1, the lower end position inside the outer sleeve 3 is also an inward converging opening, and the aperture becomes smaller and smaller downward. Finally, an air outlet 10 is formed at the outer bottom end of the outer sleeve 3. The outer bottom end of the inner nozzle 1 is clamped with the air outlet 10 at the inner bottom end of the outer sleeve 3. However, after the inner nozzle 1 is inserted into the inner part of the outer sleeve 3, there is a certain gap between the outer wall of the inner nozzle 1 and the inner wall of the outer sleeve 3. Combustible gas is introduced into the gap between the outer sleeve 3 and the inner nozzle 1 through the air vent channel 14 formed at the upper end of the sealing retaining ring 6.

[0039] In order to enable the combustible gas introduced into the inner part of the outer sleeve 3 to be ejected from the inner part of the outer sleeve 3, a plurality of uniformly distributed air channels 201 are formed at the lower part of the outer wall of the inner nozzle 1. In order to prevent the combustible gas from being blocked by the outer wall of the inner nozzle 1 after being introduced into the inner part of the outer sleeve 3 from the inner part of the air vent channel 14 and output from the bottom end of the air vent channel 14, and to direct and buffer the output combustible gas, an air guiding groove 11 is formed outside the inner nozzle 1. After the combustible gas is ejected from the inner part of the air vent channel 14, it is expanded outward by the air guiding groove 11. And under the continuous introduction of the combustible gas, the combustible gas is squeezed downward. The combustible gas passes through a plurality of uniformly distributed air channels 201 (12 in this application as an example) formed at the lower part of the outer wall of the inner nozzle 1 and is ejected outward through the air outlet 10 at the lower end of the outer sleeve 3.

[0040] The depth of the air channels 201 formed in the outer wall of the inner nozzle 1 becomes deeper and deeper downward, which is convenient for the output of combustible gas, ensures the supply of combustible gas, and avoids the situation of interrupted spraying of high-temperature flame, which affects the cutting work. The pressure increasing air channels 202 at the lower end inside the inner nozzle 1 are gradually tightened to increase the air pressure of oxygen output, increasing the cutting force of the cutting torch. The inner bottom end of the outer sleeve 3 is inwardly converged to increase the density of the flame and reduce the dispersion of the flame. The combustible gas is introduced into the inner part of the air vent channel 14 and the oxygen is introduced into the inner part of the air guiding cavity 5, and the oxygen is used for combustion support and increases the impact force of the flame.

[0041] A guiding inclined surface 12 with an inclination angle of 45° is provided at the outer edge of the top end of the inner nozzle 1, which facilitates the connection of the upper end of the inner nozzle 1 to the oxygen output pipe. A sealing inclined surface 13 with the same inclination angle of 45° is provided at the outer edge of the upper end outside the sealing retaining ring 6, which facilitates the connection to the gas nozzle of the combustible gas outlet pipe.

[0042] In order to prevent the combustible gas ejected from the air outlet hole 10 at the bottom end of the outer sleeve 3 from contacting the cutting piece and blocking the gas nozzle, a number of uniformly distributed air guiding grooves 4 (three are taken as an example in this application) are opened at the outer bottom end of the outer sleeve 3. The inside and outside of the bottom end of the inner part of the outer sleeve 3 are communicated through the inside of the air guiding grooves 4, so as to prevent the air outlet hole 10 at the bottom end of the outer sleeve 3 from being blocked, resulting in the phenomenon of backfire of the cutting torch and affecting the cutting work.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined cutting gun cutting nozzle, characterized in that: include: An inner nozzle (1), wherein an air guide cavity (5) is provided inside the inner nozzle (1) along the axial direction, a sealing retaining ring (6) is sleeved on the outside of the inner nozzle (1), a clamping ring block (7) is sleeved on the outside of the inner nozzle (1), and the outer top end of the clamping ring block (7) is fixedly connected to the outer bottom end of the sealing retaining ring (6); An air guide mechanism (2), the air guide mechanism (2) being arranged at the bottom of the inner mouthpiece (1), the air guide mechanism (2) comprising an air channel (201) and a pressurized air channel (202), a plurality of the air channels (201) being evenly distributed and opened at the bottom of the outer side of the inner mouthpiece (1), the pressurized air channel (202) being opened at the bottom end of the inner mouthpiece (1), and the pressurized air channel (202) being connected to the inside of the air guide cavity (5); An outer sleeve (3), the outer sleeve (3) being sleeved on the outside of the inner nozzle (1), a sealing ring (8) being fixedly connected to the top of the outer sleeve (3) for use with a sealing retaining ring (6), a receiving groove (9) being provided on the inner top of the outer sleeve (3) for use with a clamping ring block (7), and an air outlet hole (10) being provided on the bottom of the outer sleeve (3) for use with the bottom of the inner nozzle (1); A plurality of air guide grooves (4) are evenly distributed and opened at the outer bottom end of the outer jacket (3); the inside and outside of the bottom end of the outer jacket (3) are connected through the inside of the air guide grooves (4).

2. The combined cutting gun cutting nozzle according to claim 1, characterized in that: The sealing baffle ring (6) is fixedly connected to the inner nozzle (1), the snap ring block (7) is fixedly connected to the inner nozzle (1), the outer top end of the snap ring block (7) is fixedly connected to the outer bottom end of the sealing baffle ring (6), and the outer diameter of the snap ring block (7) is smaller than the outer diameter of the sealing baffle ring (6).

3. The combined cutting gun cutting nozzle according to claim 1, characterized in that: An air inlet groove (11) is provided on the outer side of the inner nozzle (1), and the air inlet groove (11) is located on a side of the clamping ring block (7) away from the sealing retaining ring (6).

4. The combined cutting gun cutting nozzle according to claim 1, characterized in that: The air guide cavity (5) is connected to the boost air channel (202) via a chamfered structure, and the interior of the outer sleeve (3) is connected to the air outlet (10) via a chamfered structure.

5. The combined cutting gun cutting nozzle according to claim 1, characterized in that: A guiding bevel (12) is provided at the outer edge of the top end of the inner nozzle (1), and a sealing bevel (13) is provided at the outer edge of the top end of the sealing retaining ring (6). Both the guiding bevel (12) and the sealing bevel (13) face away from the clamping ring block (7), and both the guiding bevel (12) and the sealing bevel (13) are 45° bevels.

6. The combined cutting gun cutting nozzle according to claim 1, characterized in that: The outer top of the sealing baffle ring (6) is provided with a plurality of evenly distributed ventilation cavities (14), and the outer top of the sealing baffle ring (6) is connected to the outer bottom of the clamping ring block (7) through the inside of the ventilation cavities (14).

7. The combined cutting gun cutting nozzle according to claim 1, characterized in that: The outer diameters of the outer bottom of the inner nozzle (1) and the outer bottom of the outer sleeve (3) are gradually reduced along the axial direction.

8. The combined cutting gun cutting nozzle according to claim 1, characterized in that: The depth of the air channel (201) gradually increases along the axial direction of the inner mouthpiece (1), and the bottom end of the air channel (201) is deeper than the top end.

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