CN107477581B - Cutting nozzle structure - Google Patents

Cutting nozzle structure Download PDF

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Publication number
CN107477581B
CN107477581B CN201710718753.XA CN201710718753A CN107477581B CN 107477581 B CN107477581 B CN 107477581B CN 201710718753 A CN201710718753 A CN 201710718753A CN 107477581 B CN107477581 B CN 107477581B
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China
Prior art keywords
conical surface
fire outlet
cutting nozzle
cutting
preheating
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CN201710718753.XA
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CN107477581A (en
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王燕燕
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Ningbo Aikemi Metal Industry And Trade Co ltd
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Ningbo Aikemi Metal Industry And Trade Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/52—Nozzles for torches; for blow-pipes
    • F23D14/54—Nozzles for torches; for blow-pipes for cutting or welding metal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Nozzles (AREA)

Abstract

The invention provides a cutting nozzle structure, which comprises: the outer sleeve is provided with a containing cavity, and the front end of the outer sleeve is provided with a fire outlet which is directly connected with the inner wall of the containing cavity through an inner conical surface; the inner nozzle is provided with a rod-shaped fire outlet part, a preheating part and a connecting part which are distributed in sequence, the middle part of the inner nozzle is penetrated with a central channel, the front end part of the preheating part is provided with an outer conical surface, a plurality of concave ventilation grooves which are uniformly distributed are axially arranged on the peripheral side surface of the preheating part, the ventilation grooves extend to the rear end part of the preheating part from the outer conical surface, when the inner nozzle is inserted into the accommodating cavity, the outer peripheral surface of the end part of the outer conical surface, which is far away from the fire outlet, is tightly contacted with the corresponding position of the inner conical surface, the contact of the inner conical surface and the outer conical surface is multipoint supporting contact on the same peripheral surface, at the moment, the outer conical surface and one part of the fire outlet are arranged in an inner surrounding ring of the inner conical surface, and the other part of the fire outlet is inserted into the fire outlet. The cutting nozzle structure has the advantages of ensuring concentricity of the cutting opening and the fire outlet and ideal flame spraying effect.

Description

Cutting nozzle structure
Technical Field
The invention belongs to the technical field of welding and cutting tools, and relates to a cutting nozzle structure.
Background
The cutting nozzle is arranged at the head of the welding and cutting tool, and has the functions of spraying flame and concentrating the flame to generate high heat, thus being an important component of the welding and cutting tool such as a welding and cutting gun. The prior art is provided with a cutting nozzle shown in figure 1, which mainly comprises an inner nozzle and an outer sleeve with a cavity, wherein the front end of the outer sleeve is provided with a fire outlet communicated with the bottom surface of the bottom of the cavity, the inner nozzle is provided with a rod-shaped fire outlet part, a hexagonal column-shaped preheating part and a connecting part which are distributed in sequence, the fire outlet part penetrates through the fire outlet and stretches out of the outer sleeve, the front end of the preheating part is provided with an outer conical surface, and the outer conical surface is contacted with the connecting part of the fire outlet and the bottom surface of the cavity, so that a larger gap is formed between the preheating part and the inner wall and the bottom surface of the cavity, the gap forms an integral peripheral channel, and meanwhile, a larger gap is formed between the fire outlet part and the inner wall of the fire outlet, and the middle part of the inner nozzle is provided with a central channel in a penetrating manner.
Such a cutting tip structure arrangement has the following drawbacks: because the tight fit part of the inner nozzle and the outer sleeve is arranged at the joint of the outer conical surface, the fire outlet and the bottom surface of the cavity, a larger gap is formed between the preheating part and the inner wall and the bottom surface of the cavity, and a larger gap is also formed between the fire outlet and the inner wall of the fire outlet. In addition, the hexagonal columnar preheating part is not reliably matched with the inner cavity, so that the hexagonal columnar preheating part is easy to loosen, flames sprayed out of the periphery of the cutting opening of the peripheral channel cannot be converged into a beam, the spraying effect is affected, and the stability of high-pressure cutting flames in the middle cannot be guaranteed.
In view of the above, it is desirable to design a cutting nozzle that can ensure concentricity of a cutting port and a flame outlet and that has an ideal flame spraying effect.
Disclosure of Invention
The invention aims at solving the problems in the prior art and provides a cutting nozzle structure which can ensure concentricity of a cutting port and a fire outlet and ideal flame spraying effect.
The aim of the invention can be achieved by the following technical scheme: a cutting tip structure comprising:
the outer sleeve is provided with a containing cavity, and the front end of the outer sleeve is provided with a fire outlet which is directly connected with the inner wall of the containing cavity through an inner conical surface;
the inner nozzle is provided with a rod-shaped fire outlet part, a preheating part and a connecting part which are distributed in sequence, the middle part of the inner nozzle is penetrated with a central channel, the front end part of the preheating part is provided with an outer conical surface, a plurality of concave ventilation grooves which are uniformly distributed are axially arranged on the peripheral side surface of the preheating part, the ventilation grooves extend to the rear end part of the preheating part from the outer conical surface, when the inner nozzle is inserted into the accommodating cavity, the outer peripheral surface of the end part of the outer conical surface, which is far away from the fire outlet, is tightly contacted with the corresponding position of the inner conical surface, the contact of the inner conical surface and the outer conical surface is multipoint supporting contact on the same peripheral surface, at the moment, the outer conical surface and one part of the fire outlet are arranged in an inner surrounding ring of the inner conical surface, and the other part of the fire outlet is inserted into the fire outlet.
As a further improvement of the invention, the ventilating grooves extend from the middle part of the outer conical surface to the rear end part of the preheating part, a convex rib is formed between two adjacent ventilating grooves, and the multipoint supporting contact is realized by the front end of the convex rib and the inner conical surface.
As a further improvement of the invention, the vent grooves are arranged in an open groove structure with narrow inside and wide outside, and the width of the vent grooves is larger than the thickness of the convex edges.
As a further improvement of the invention, the front end of the fire outlet is arranged in the fire outlet or slightly extends out of the fire outlet.
As a further improvement of the invention, on the same cross section, the included angles of the two sides of the inner conical surface are acute angles, and the included angles of the two sides of the outer conical surface are obtuse angles.
As a further improvement of the invention, the cutting nozzle structure also comprises a cutting nozzle head, the connecting part is inserted into the front end of the cutting nozzle head and is in threaded connection with the cutting nozzle head, the cutting nozzle head can be inserted into the outer sleeve together with the inner nozzle, and the cutting nozzle head is in threaded connection with the rear end of the inner wall of the cavity.
As a further improvement of the invention, six ventilation grooves which are uniformly distributed are axially arranged on the peripheral side surface of the preheating part, and six ventilation holes which are in one-to-one correspondence with the ventilation grooves are axially arranged on the cutting tip.
Based on the technical scheme, the embodiment of the invention at least has the following technical effects:
1. the cutting nozzle structure cancels the bottom surface structure similar to the original outer sleeve containing cavity, the fire outlet is directly connected with the inner wall of the containing cavity through a longer inner conical surface, the outer peripheral surface of the end part of the rear end of the outer conical surface is propped against the inner conical surface when the inner nozzle is installed, the diameter of the fire outlet of the cutting nozzle is reduced through the structural layout, the corresponding fire outlet can be more tightly matched with the fire outlet, the gap between the fire outlet and the fire outlet is obviously reduced, the length of the fire outlet in the scheme is further shortened, namely, the tightly matched part of the inner nozzle and the outer sleeve is arranged at the middle position of the inner conical surface and the rear end part of the outer conical surface, the gap between the preheating part and the inner wall of the containing cavity is reasonable, the gap between the fire outlet and the inner wall of the fire outlet is smaller, a part of the inner conical surface which is close to the rear is arranged in the inner surrounding ring of the inner conical surface, a part of the fire outlet which is close to the front is limited in the fire outlet, and further has a good limiting effect, the fixing firmness is ensured, and the concentricity of the cut opening (the front end of a central channel) of the inner nozzle and the fire outlet is ensured, and the work is not easy to loosen and shift during installation.
2. The concave ventilation grooves are axially formed in the peripheral side face of the preheating part, so that the peripheral channels are formed between the periphery of the preheating part and the inner wall of the accommodating cavity, and simultaneously, each ventilation groove is respectively and independently formed into one ventilation channel, and the ventilation grooves have good flow guiding effect, so that high-pressure cutting flame is sprayed out of the cutting opening during preheating and normal cutting operation, meanwhile, the periphery of the cutting opening is tightly surrounded and sprayed with the preheating flame converged into a beam, the sprayed flame is more concentrated, the interference of external factors on the cutting flame in the center is avoided, the flame spraying effect is ideal, and the work stability is ensured.
Drawings
The invention is described in further detail below with reference to the attached drawing figures, wherein:
fig. 1 is a schematic view of a prior art cutting nozzle.
FIG. 2 is a schematic diagram of a preferred embodiment of the present invention.
Fig. 3 is an exploded view of a preferred embodiment of the present invention.
FIG. 4 is a schematic view of the structure of the outer jacket according to a preferred embodiment of the present invention.
FIG. 5 is a schematic view showing the structure of an inner nozzle according to a preferred embodiment of the present invention.
In the figure, 10, the inner nozzle; 11. a fire outlet part; 12. a preheating part; 13. a connection part; 14. an outer conical surface; 15. a central passage; 16. cutting a port; 17. a vent groove; 20. a jacket; 21. a cavity; 22. a fire outlet; 23. an inner conical surface; 30. cutting the tip.
Detailed Description
The following are specific embodiments of the present invention and the technical solutions of the present invention will be further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.
The technical solution provided by the present invention is described in more detail below with reference to fig. 2 to 5.
As shown in fig. 2 to 5, the present cutting nozzle structure includes:
the outer sleeve 20 is provided with a containing cavity 21, and the front end of the outer sleeve 20 is provided with a fire outlet 22 which is directly connected with the inner wall of the containing cavity 21 through an inner conical surface 23;
the inner nozzle 10 is provided with a rod-shaped fire outlet 11, a preheating part 12 and a connecting part 13 which are distributed in sequence, a central channel 15 is penetrated in the middle of the inner nozzle 10, an outer conical surface 14 is arranged at the front end part of the preheating part 12, a plurality of concave ventilation grooves 17 which are uniformly distributed are axially arranged on the peripheral side surface of the preheating part 12, the ventilation grooves 17 extend from the outer conical surface 14 to the rear end part of the preheating part 12, when the inner nozzle 10 is inserted into the accommodating cavity 21, the outer peripheral surface of the end part of the outer conical surface 14 far away from the fire outlet 22 is tightly contacted with the corresponding position of the inner conical surface 23, the contact of the inner conical surface and the outer conical surface 14 is multipoint supporting contact on the same peripheral surface, at the moment, the outer conical surface 14 and one part of the fire outlet 11 are arranged in an inner surrounding ring of the inner conical surface 23, and the other part of the fire outlet 11 is inserted into the fire outlet 22.
The invention protects a cutting nozzle structure, which cancels a bottom surface structure similar to an original containing cavity 21 of an outer sleeve 20, wherein a fire outlet 22 is directly connected with the inner wall of the containing cavity 21 through a longer inner conical surface 23, when the inner nozzle 10 is installed, the outer peripheral surface of the rear end part of the outer conical surface 14 is abutted against the inner conical surface 23, the diameter of the fire outlet 22 of the cutting nozzle is reduced by the structural layout, the corresponding fire outlet 11 can be more closely matched with the fire outlet 22, the gap between the fire outlet 11 and the fire outlet 22 is obviously reduced, the length of the fire outlet 11 in the cutting nozzle is further shortened, namely, the tightly matched part of the inner nozzle 10 and the outer sleeve 20 is arranged at the middle position of the inner conical surface 23 and the rear end part of the outer conical surface 14, the gap between the preheating part 12 and the inner wall of the containing cavity 21 is reasonable, the gap between the fire outlet 11 and the inner wall of the fire outlet 22 is smaller, a part of the inner conical surface 23 which is connected with the inner conical surface is arranged in an inner surrounding ring of the inner conical surface 23, and a part of the fire outlet 11 which is positioned in the fire outlet 22, so that the part of the front of the fire outlet 11 is limited in the fire outlet 22 has good limiting effect, and the reliable fixing is ensured, and the reliable cutting of the center 16 of the cutting nozzle 10 and the front of the fire outlet 15 is not easy to be installed and the front of the fire outlet 22 and is not easy to be loose, and not easy to be ensured to be installed.
In addition, the structure of the preheating part 12 of the prior hexagonal column is further improved, the concave ventilation grooves 17 are axially arranged on the peripheral side surface of the preheating part 12, so that the periphery of the preheating part 12 and the inner wall of the containing cavity 21 form peripheral channels, simultaneously, each ventilation groove 17 respectively and independently forms a ventilation channel, the contact of the inner conical surface 23 and the outer conical surface 14 is multipoint supporting contact, the contact is obviously different from the contact of the whole circumference, and the structure has good flow guiding effect, so that when the preheating and normal cutting operation are performed, high-pressure cutting flame is sprayed out from the cutting opening 16, and meanwhile, the cutting flame converged into bundles is tightly surrounded and sprayed on the periphery of the cutting opening, so that the sprayed flame is more concentrated, the interference of external factors on the cutting flame in the center is avoided, the flame spraying effect is ideal, and the work stability is ensured.
Further, in order to ensure the close fit of the two conical surfaces and the rear end of the fire outlet part 11 can be reliably placed in the inner surrounding ring of the inner conical surface 23, and the front end of the integral inner nozzle 10 has a gathering effect, on the same cross section, the included angles of two sides of the inner conical surface 23 are acute angles, and the included angles of two sides of the outer conical surface 14 are obtuse angles.
As shown in fig. 4 and 5, the acute included angle is preferably α, and the α angle is in the range of 60 ° to 85 °, and more preferably 70 °; the obtuse included angle is preferably β, and β is in the range of 100 ° to 150 °, and more preferably 120 °.
The inner nozzle 10 and the outer sleeve 20 in the scheme have compact structural layout, the length of the fire outlet 11 is shortened, the front end part of the fire outlet 11 is arranged in the fire outlet 22 or slightly extends out of the fire outlet 22, and preferably the fire outlet 11 is received in the fire outlet 22 or the front end face of the fire outlet 11 is flush with the front end face of the outer sleeve 20.
In the invention, in order to ensure the preheating ventilation effect and the limit effect of the inner nozzle 10 and the inner conical surface 23 of the outer sleeve 20, the ventilation grooves 17 are axially arranged on the whole preheating part 12, the ventilation grooves 17 extend from the middle part of the outer conical surface 14 to the rear end part of the preheating part 12, convex edges are formed between two adjacent ventilation grooves 17, and the multipoint supporting contact is realized by the front ends of the convex edges and the inner conical surface 23; the reliability of the multipoint support contact is further ensured, and the multipoint support contact is obviously different from the existing whole circumference abutting contact; the peripheral channels are formed between the convex edges and the inner wall of the inner cavity, and each ventilation groove 17 is a single ventilation channel, so that peripheral flames are sprayed in a beam shape, and the effect is ideal.
Further, in order to ensure the ideal jet effect of the clustered peripheral flames and the fluxion, the vent grooves 17 are arranged to be of an open groove structure with the inner narrow and the outer wide, and the width of the vent grooves 17 is larger than the thickness of the convex edges; that is, the width of the vent groove 17 is largest at the opening when the preheating part 12 is seen from the inside to the outside.
Preferably, the cutting nozzle structure further comprises a cutting nozzle head 30 for limiting and fixing the inner nozzle 10, the connecting part 13 is inserted into the front end of the cutting nozzle head 30 and is in threaded connection with the cutting nozzle head, the cutting nozzle head 30 can be inserted into the outer sleeve 20 together with the inner nozzle 10, and the cutting nozzle head 30 is in threaded connection with the rear end of the inner wall of the accommodating cavity 21.
Further, to ensure the overall flame spraying effect and stress concentration, and the reliability of the preset operation, six ventilation grooves 17 are preferably uniformly distributed on the peripheral side surface of the preheating part 12 in the axial direction, and six ventilation holes corresponding to the ventilation grooves 17 one by one are axially provided on the cutting tip 30.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (7)

1. A cutting nozzle structure which is characterized in that: comprising the following steps:
the outer sleeve is provided with a containing cavity, and the front end of the outer sleeve is provided with a fire outlet which is directly connected with the inner wall of the containing cavity through an inner conical surface;
the inner nozzle is provided with a rod-shaped fire outlet part, a preheating part and a connecting part which are distributed in sequence, the middle part of the inner nozzle is penetrated with a central channel, the front end part of the preheating part is provided with an outer conical surface, a plurality of concave ventilation grooves which are uniformly distributed are axially arranged on the peripheral side surface of the preheating part, the ventilation grooves extend to the rear end part of the preheating part from the outer conical surface, when the inner nozzle is inserted into the accommodating cavity, the outer peripheral surface of the end part of the outer conical surface, which is far away from the fire outlet, is tightly contacted with the corresponding position of the inner conical surface, the contact of the inner conical surface and the outer conical surface is multipoint supporting contact on the same peripheral surface, at the moment, the outer conical surface and one part of the fire outlet are arranged in an inner surrounding ring of the inner conical surface, and the other part of the fire outlet is inserted into the fire outlet.
2. A cutting nozzle structure according to claim 1, wherein: the ventilation grooves extend from the middle of the outer conical surface to the rear end of the preheating part, a convex rib is formed between two adjacent ventilation grooves, and the multipoint supporting contact is realized by the front end of the convex rib and the inner conical surface.
3. A cutting nozzle structure according to claim 2, wherein: the vent grooves are arranged into an open groove structure with the inner part being narrow and the outer part being wide, and the width of the vent grooves is larger than the thickness of the convex ribs.
4. A cutting nozzle structure according to claim 1, wherein: the front end part of the fire outlet part is arranged in the fire outlet or slightly extends out of the fire outlet.
5. A cutting nozzle structure according to claim 1, wherein: on the same cross section, the included angles of two sides of the inner conical surface are acute angles, and the included angles of two sides of the outer conical surface are obtuse angles.
6. A cutting nozzle structure according to any one of claims 1 to 5, wherein: the cutting nozzle structure also comprises a cutting nozzle head, the connecting part is inserted into the front end of the cutting nozzle head and is in threaded connection with the cutting nozzle head, the cutting nozzle head can be connected with the inner nozzle to be inserted into the outer sleeve, and the cutting nozzle head is in threaded connection with the rear end of the inner wall of the cavity.
7. A cutting nozzle structure as defined in claim 6, wherein: six ventilation grooves which are uniformly distributed are axially arranged on the peripheral side surface of the preheating part, and six ventilation holes which are in one-to-one correspondence with the ventilation grooves are axially arranged on the cutting nozzle head.
CN201710718753.XA 2017-08-21 2017-08-21 Cutting nozzle structure Active CN107477581B (en)

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Application Number Priority Date Filing Date Title
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CN107477581B true CN107477581B (en) 2023-06-27

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5273216A (en) * 1991-09-05 1993-12-28 Canadian Liquid Air Ltd. - Air Liquide Canada Ltee Oxy-fuel cutting tip having swaged gas outlet passages
CN203836964U (en) * 2014-05-15 2014-09-17 青岛国胜焊割设备有限公司 Sleeve-type cutting tip of cutting torch
CN105738542A (en) * 2014-12-11 2016-07-06 中国科学院大连化学物理研究所 Nozzle assembly for micro-size hydrogen flame ionization detector
CN207162543U (en) * 2017-08-21 2018-03-30 宁波艾克米金属工贸有限公司 One kind cuts nozzle structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5273216A (en) * 1991-09-05 1993-12-28 Canadian Liquid Air Ltd. - Air Liquide Canada Ltee Oxy-fuel cutting tip having swaged gas outlet passages
CN203836964U (en) * 2014-05-15 2014-09-17 青岛国胜焊割设备有限公司 Sleeve-type cutting tip of cutting torch
CN105738542A (en) * 2014-12-11 2016-07-06 中国科学院大连化学物理研究所 Nozzle assembly for micro-size hydrogen flame ionization detector
CN207162543U (en) * 2017-08-21 2018-03-30 宁波艾克米金属工贸有限公司 One kind cuts nozzle structure

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