CN212961587U - Cutting nozzle core sleeve for gas cutting torch - Google Patents

Abstract

The utility model discloses a cutting torch core sleeve for a gas cutting torch, which comprises a cutting torch core rod, wherein the rear part of the cutting torch core rod is provided with a cutting torch rod seat, the front end of the cutting torch core rod is provided with a cutting torch core head, and the cutting torch core rod, the cutting torch rod seat and the cutting torch core head are integrally formed; the outer periphery of the cutting nozzle rod seat is provided with an outer conical surface for quick installation, and the outer conical surface is provided with a plurality of preheating gas inlet grooves; the cutting torch core rod, the cutting torch rod seat and the cutting torch core head are integrally formed to form the cutting torch core sleeve, and the cutting torch core sleeve is formed at one time through a die, so that the processing mode is more convenient, the cost is lower, and mass production can be realized; when oxygen passes through the oxygen channel, a connecting seam generated by thread matching does not exist, airflow resistance is small, smoothness and stability of oxygen flowing can be effectively guaranteed, gas outlet is rapid and stable, formed cutting seams have consistency, and cutting quality is effectively improved; in addition, because the cutting nozzle core head and the cutting nozzle core rod are of an integrated structure, when oxygen passes through, the phenomenon of air leakage cannot occur, and the cutting nozzle core head has better safety.

Description

Cutting nozzle core sleeve for gas cutting torch

Technical Field

The utility model relates to a cutting torch technical field especially relates to a gas is cutting torch core cover for cutting torch.

Background

The gas cutting is performed by: a mixed gas obtained by mixing fuel gas and oxygen is injected from a gas cutting nozzle, a preheating flame obtained by combustion preheats a workpiece such as a steel plate, cutting oxygen is injected to the sufficiently preheated workpiece to burn a base material, and a molten base material and an oxidation product are removed by injection energy. Then, the gas cutting torch is driven in the target direction while continuing the gas cutting, whereby the workpiece can be cut into a target shape.

The fuel gas for gas cutting comprises acetylene gas, liquefied petroleum gas, natural gas, ethylene gas, hydrogen gas and the like, each fuel gas is provided with a special cutting nozzle, and the cutting nozzle is an important part of the cutting torch and has a great influence on the performance of the whole cutting torch. The acetylene gas mainly adopts an annular cutting nozzle, and the liquefied petroleum gas or natural gas mainly adopts a plum blossom type cutting nozzle.

The conventional plum blossom-shaped cutting torch generally comprises a cutting torch outer sleeve, a cutting torch core and a cutting torch seat, wherein the three parts are connected in a threaded fit manner, and fig. 12 shows a plum blossom-shaped cutting torch commonly used in the prior art. After the cutting nozzle connected through the threads is expanded by high temperature, the threaded connection part is easy to deform and loosen, on one hand, the phenomenon of tempering caused by air leakage is caused, and on the other hand, the original airflow order is disturbed, so that the cutting quality is reduced; in addition, the cutting torch core among the prior art is only on the cutting torch seat through threaded connection to have the gap between cutting torch core and the cutting torch overcoat, so lead to the outer end of cutting torch core because do not have the location and formed cantilever structure, long-time high temperature cutting back, the cutting torch core can produce certain deformation, lead to the no longer coaxial between cutting torch core and the cutting torch overcoat, make gas give vent to anger inhomogeneously from the gap between cutting torch core and the cutting torch overcoat, cause the cutting quality not good.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a cutting torch core sleeve for a gas cutting torch, which has simple structure, convenient processing, no gas leakage and higher coaxiality, is provided.

In order to solve the technical problem, the technical scheme of the utility model is that: the cutting torch core sleeve for the gas cutting torch comprises a cutting torch core rod, wherein a cutting torch rod seat is arranged at the rear part of the cutting torch core rod, a cutting torch core head is arranged at the front end of the cutting torch core rod, and the cutting torch core rod, the cutting torch rod seat and the cutting torch core head are integrally formed; the periphery of cutting torch pole seat is provided with the outer conical surface that is used for quick installation, be provided with a plurality of gas mixture air inlet ducts on the outer conical surface.

As a preferred technical scheme, the mixed gas inlet grooves on two sides of the cutting torch rod seat are symmetrically arranged, the openings of the mixed gas inlet grooves on the same side face the same direction, and the openings of the mixed gas inlet grooves on two sides are opposite in direction; the mixed gas inlet groove is a groove convenient for outward demoulding.

As a preferred technical scheme, a plurality of mixed gas guide grooves in an annular array are arranged on the periphery of the cutting nozzle core head, and a mixed gas guide strip is formed between every two adjacent mixed gas guide grooves.

As a preferred technical scheme, a core head positioning section for fixed installation and a core head flow guide section for gas flow guide are arranged on the cutting nozzle core head, and the core head flow guide section is arranged at the front end of the core head positioning section.

As a preferable technical scheme, the peripheries of all the mixed gas guide bars in the core head positioning section jointly form a core head positioning surface used for being fastened on the cutting nozzle outer sleeve, and the peripheries of all the mixed gas guide bars in the core head flow guide section jointly form a core head flow guide surface in clearance fit with the cutting nozzle outer sleeve.

As a preferred technical scheme, the peripheries of at least three uniformly arranged mixed gas guide bars in the core head positioning section jointly form a core head positioning surface for fastening on the cutting torch outer sleeve, and the rest mixed gas guide bars in the core head positioning section and all the mixed gas guide bars in the core head flow guide section are in clearance fit with the cutting torch outer sleeve.

As a preferable technical scheme, a positioning shoulder is correspondingly arranged on the outer conical surface.

According to the preferable technical scheme, the cutting torch core rod, the cutting torch rod seat and the cutting torch core head are integrally formed into a cutting torch core sleeve, and the cutting torch core sleeve is a powder metallurgy core sleeve.

Due to the adoption of the technical scheme, the cutting torch core sleeve for the gas cutting torch comprises a cutting torch core rod, wherein a cutting torch rod seat is arranged at the rear part of the cutting torch core rod, a cutting torch core head is arranged at the front end of the cutting torch core rod, and the cutting torch core rod, the cutting torch rod seat and the cutting torch core head are integrally formed; the outer periphery of the cutting nozzle rod seat is provided with an outer conical surface for quick installation, and a plurality of mixed gas inlet grooves are formed in the outer conical surface; the utility model has the advantages that: the cutting torch core rod, the cutting torch rod seat and the cutting torch core head are integrally formed to form the cutting torch core sleeve, the torch core is not connected to the core rod through threads as in the prior art, the integrally formed structure of the device is formed at one time through a die, the processing mode is more convenient, the cost is lower, and mass production can be realized; in addition, threads do not need to be machined for matching after respective machining as in the prior art, so that the interchangeability between the cutting nozzle core sleeve and the cutting nozzle outer sleeve of the device is high, and the matching degree is good; when oxygen passes through the oxygen channel, a connecting seam generated by thread matching does not exist, airflow resistance is small, smoothness and stability of oxygen flowing can be effectively guaranteed, gas is discharged quickly and stably, formed cutting seams have consistency, and cutting quality is effectively improved; in addition, because the cutting nozzle core head and the cutting nozzle core rod are of an integrated structure, when oxygen passes through, the phenomenon of air leakage cannot occur, and the cutting nozzle core head has better safety.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 3 is a schematic structural view of a core sleeve of a cutting torch according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a cutting torch rod seat according to an embodiment of the present invention;

FIG. 5 is an enlarged schematic view at C in FIG. 3;

FIG. 6 is an enlarged sectional view taken along line A-A of FIG. 2;

FIG. 7 is an enlarged view of a section taken in the direction B of FIG. 2;

FIG. 8 is a schematic structural view of a core sleeve of a second cutting torch according to an embodiment of the present invention;

FIG. 9 is an enlarged schematic view at D of FIG. 8;

FIG. 10 is a schematic view of the core head and the outer sleeve of the second cutting torch according to the embodiment of the present invention;

fig. 11 is a schematic structural diagram of a third embodiment of the present invention;

FIG. 12 is a schematic diagram of a background art structure;

in the figure: 1-cutting nozzle jacket; 2-cutting nozzle core bar; 3-cutting nozzle rod seat; 31-outer conical surface; 32-mixed gas inlet groove; 33-a parting surface; 34-left mold half; 35-right half mould; 4-cutting a nozzle core head; 41-mixed gas guide groove; 42-mixed gas guide bar; 43-core print positioning surface; 44-core head flow guide surface; 45-core print positioning section; 46-core head flow guide section; 5-oxygen channel; 6-a mixed gas channel; 7-a mixed gas inlet; 8-positioning shoulder.

Detailed Description

The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

The first embodiment is as follows:

as shown in fig. 1 to 7, the powder metallurgy cutting tip for the gas cutting torch is mainly used for liquefied petroleum gas, natural gas and ethylene gas; the structure comprises a cutting torch outer sleeve 1, wherein a cutting torch core rod 2 is installed in the cutting torch outer sleeve 1, a cutting torch rod seat 3 is arranged at the rear part of the cutting torch core rod 2, the cutting torch rod seat 3 is installed at the rear end of the cutting torch outer sleeve 1 in a conical surface matching mode, and a rod seat fixing structure is further arranged between the cutting torch rod seat and the cutting torch outer sleeve; the front end of the cutting torch core rod 2 is provided with a cutting torch core head 4, the cutting torch core head 4 is coaxially fixed at the front end of the cutting torch outer sleeve 1, the cutting torch core rod 2, the cutting torch rod seat 3 and the cutting torch core head 4 are integrally formed to form a cutting torch core sleeve, and the cutting torch core sleeve is the cutting torch core sleeve for the gas cutting torch.

An oxygen channel 5 penetrates through the center of the cutting nozzle core sleeve, and oxygen is introduced into the oxygen channel 5 to realize the cutting effect; a mixed gas channel 6 is arranged between the cutting torch core rod 2 and the cutting torch outer sleeve 1, a plurality of mixed gas inlets 7 communicated with the mixed gas channel 6 are arranged between the cutting torch rod seat 3 and the cutting torch outer sleeve 1, a plurality of mixed gas outlets communicated with the mixed gas channel 6 are arranged on the periphery of the cutting torch core head 4 in a penetrating manner, and the mixed gas enters the mixed gas channel 6 from the mixed gas inlets 7 and then is discharged from the mixed gas outlets.

The rear end of the cutting torch core sleeve is installed at the rear end of the cutting torch outer sleeve 1 through the cutting torch rod seat 3 in a conical surface fit mode, coaxiality between the cutting torch rod seat 3 and the cutting torch outer sleeve 1 is guaranteed, and the front end of the cutting torch core sleeve is used for ensuring coaxiality between the cutting torch core head 4 and the cutting torch outer sleeve 1 by coaxially fixing the cutting torch core head 4 at the front end of the cutting torch outer sleeve 1; the coaxiality of the front end and the rear end of the cutting torch core sleeve is guaranteed, particularly, the coaxiality of the cutting torch core head 4 is guaranteed, after the cutting torch core head 4 is cut at high temperature for a long time, the cutting torch core head 4 is heated and even can deform, the coaxiality between the cutting torch outer sleeves 1 can still be kept, mixed gas is discharged from a gap between the cutting torch core head 4 and the cutting torch outer sleeves 1 and is kept uniform all the time, the gas is discharged smoothly, and the problems that the gas is not uniformly discharged due to the fact that the air is not matched through threaded connection in the traditional design are effectively avoided.

The cutting torch rod seat 3 is arranged on the cutting torch outer sleeve 1 through the rod seat fixing structure, a torch rod is not connected on the outer sleeve through threads as in the prior art, the matching installation mode is simple, and the quick installation effect can be realized; meanwhile, the stability of connection between the cutting torch rod seat 3 and the cutting torch outer sleeve 1 can be ensured, and the problem that the connection is dropped and the like to influence the use safety is avoided.

The cutting torch core rod 2, the cutting torch rod seat 3 and the cutting torch core head 4 are integrally formed to form a cutting torch core sleeve, the torch core is not connected to the core rod through threads as in the prior art, the integrally formed structure of the device is formed at one time through a die, the processing mode is more convenient, the cost is lower, and mass production can be realized; in addition, as in the prior art, threads are not required to be processed and matched after being processed respectively, so that the interchangeability between the cutting nozzle core sleeve and the cutting nozzle outer sleeve 1 of the device is high, and the matching degree is good; when oxygen passes through the oxygen channel 5, a connecting seam generated by thread matching does not exist, airflow resistance is small, smoothness and stability of oxygen flowing can be effectively guaranteed, gas is discharged quickly and stably, formed cutting seams have consistency, and cutting quality is effectively improved; in addition, because the cutting nozzle core head 4 and the cutting nozzle core rod 2 are of an integrated structure, when oxygen passes through, the phenomenon of air leakage cannot occur, and the safety is better.

The utility model has simple structure and reasonable design, is convenient to process by adopting an integrated structure, is more convenient to install by conical surface matching, and can not generate air leakage phenomenon; in addition, the coaxiality of the front end and the rear end of the cutting nozzle core rod 2 can be guaranteed, the air outlet is guaranteed to be smoother, the air outlet speed is improved, and the cutting quality is guaranteed.

The front end of the cutting nozzle core head 4 is positioned in the cutting nozzle outer sleeve 1, and the structure of the cutting nozzle core head is the same as that of a plum blossom-shaped cutting nozzle for propane and the like in the prior art.

The oxygen channel 5 is formed by the transition of a large-diameter cylindrical channel from back to front through a conical surface, so that a small-diameter cylindrical channel is formed, when oxygen enters the small-diameter cylindrical channel from the large-diameter cylindrical channel, the diameter is suddenly reduced, the flow velocity of the oxygen is suddenly increased, and the quick air outlet effect can be realized; mix gas passageway 6 and pass through the conical surface transition by major diameter ring passageway from back forward and form minor diameter ring passageway, mix the gas and get into to minor diameter ring passageway by major diameter ring passageway when, because the diameter diminishes suddenly for mix the gas velocity of flow increase suddenly, can realize giving vent to anger the effect fast.

Referring to fig. 3, the outer circumference of the cutting torch rod base 3 is provided with an outer conical surface 31, the rear end of the cutting torch outer sleeve 1 is provided with an inner conical hole which is matched with the outer conical surface 31, and in conical matching, the outer conical surface 31 and the inner conical hole can be automatically centered under the action of axial force, so that the axes of the inner cone and the outer cone have high coaxiality and can be quickly installed.

The rod seat fixing structure comprises a self-locking conical surface between the outer conical surface 31 and the inner conical hole and/or a welding part arranged between the cutting nozzle outer sleeve 1 and the cutting nozzle rod seat 3. The welding part can be spot welding or seam welding, adopts seam welding in this embodiment, not only can realize stable installation, can further guarantee the sealed effect of fitting surface department simultaneously.

Cutting torch pole socket 3 passes through pole socket fixed knot constructs fixed mounting in cutting torch overcoat 1, pole socket fixed knot constructs including three kinds of structures, is respectively: the rod seat fixing structure comprises an outer conical surface 31 and a self-locking conical surface fit between inner conical holes, the outer conical surface 31 and the fitting surface of the inner conical holes can form a self-locking conical surface at the moment, the outer conical surface 31 is installed in the inner conical holes in a matched mode during installation, fixed installation between the outer conical surface and the inner conical holes is achieved through the self-locking conical surface fit, interference fit is achieved between the inner conical holes and the outer conical surfaces 31 at the moment, the cutting nozzle rod seat 3 is installed in the inner conical holes through extrusion and then stable installation is achieved through the self-locking principle instead of a sleeving fit mode in the prior art, and the sleeving fit mode can guarantee certain coaxiality, but the effect is poor, and in addition, the stability and the sealing performance of connection between the outer conical surfaces and the inner conical holes cannot be accurately guaranteed; the rod seat fixing structure comprises a welding part arranged between the cutting torch outer sleeve 1 and the cutting torch rod seat 3, and at the moment, after the outer conical surface 31 is installed in the inner conical hole in a matching mode, the outer end of the matching surface of the cutting torch rod seat 3 and the cutting torch outer sleeve 1 is welded and fixed, so that the fixed installation between the outer conical surface and the inner conical hole is realized; and thirdly, the rod seat fixing structure comprises an outer conical surface 31 and a self-locking conical surface between the inner conical holes, and also comprises a welding part arranged between the cutting torch outer sleeve 1 and the cutting torch rod seat 3, wherein the cutting torch rod seat 3 and the cutting torch outer sleeve 1 are combined and fixed in two modes. In order to ensure the use effect of the cutting torch, the cutting torch core sleeve and the cutting torch outer sleeve 1 are installed when the cutting torch is delivered from a factory, and the problem that the cutting effect of the cutting torch is influenced because the installation precision cannot be ensured when a user installs the cutting torch by himself is avoided, therefore, before the cutting torch is delivered from the factory, the cutting torch rod seat 3 is installed on the cutting torch outer sleeve 1 in a matched mode through a self-locking conical surface, and the rear end face of the cutting torch rod seat 3 is flush with the rear end face of the cutting torch outer sleeve 1 after the installation is completed; however, in order to avoid the phenomenon that the cutting torch core sleeve is separated from the cutting torch outer sleeve 1 due to bumping or collision in the transportation process and also avoid the damage caused by the fact that the cutting torch core head 4 is collided once separated, welding and fixing are carried out on the matching surface of the cutting torch rod seat 3 and the cutting torch outer sleeve 1, namely, a layer of installation guarantee is further added on the basis of self-locking fixing installation.

In the prior art, the traditional design of the mixed gas inlet 7 is that a through hole is formed in the non-peripheral side in the rod seat, so that additional processing is required to be performed on a mixed gas hole, the operation is more complicated, one processing mode of the through hole is mainly that a rod which is beneficial to forming the through hole is additionally arranged for forming the through hole when a die is formed, the mode of forming the through hole by utilizing the rod increases the complexity and difficulty of die manufacturing, and the positioning of the rod is more complicated; the other processing mode is mainly characterized in that after the product is molded or machined by a product mold, other hole processing modes are adopted for machining, and the processing mode is complex in operation, so that the working efficiency is low and flaws are easy to form. And the periphery of cutting torch rod seat 3 is provided with a plurality of mixed gas air inlet grooves 32, mixed gas air inlet groove 32 with enclose between the cutting torch overcoat 1 and close and form mixed gas import 7. The processing mode of the mixed gas inlet groove 32 is simpler, the mixed gas inlet groove 32 is arranged on the outer peripheral side of the cutting nozzle rod seat 3, although the mixed gas inlet groove 32 cannot achieve the function of introducing mixed gas in a separated mode, the mixed gas inlet groove and the cutting nozzle outer sleeve 1 are enclosed together, and a hole structure which is the same as that of the mixed gas inlet 7 in the prior art is formed between the mixed gas inlet groove and the cutting nozzle outer sleeve 1.

Referring to fig. 4, the mixed gas inlet grooves 32 on both sides of the cutting torch rod base 3 are symmetrically arranged, the openings of the mixed gas inlet grooves 32 on the same side face the same direction, and the openings of the mixed gas inlet grooves 32 on both sides face opposite directions; the mixed gas inlet groove 32 is a groove convenient for outward demoulding, and the mixed gas inlet groove 32 can be a curved groove, a rectangular groove, a trapezoidal groove, a triangular groove or a combined groove and the like which are convenient for demoulding; and the mixed gas inlet groove 32 is a straight groove along the axial direction of the cutting nozzle rod seat 3, which is convenient for processing and demoulding, and is shown in figure 3.

Taking the direction shown in fig. 4 as an example, the left and right mixed gas inlet grooves 32 are symmetrical, that is, a symmetrical plane is formed on the cutting torch holder 3, and the symmetrical plane is a parting plane 33 of the left half mold 34 and the right half mold 35; the mixed gas inlet groove 32 is formed when the cutting torch core rod 2 is molded, at the moment, a rod which is beneficial to hole forming is not required to be added into the mold, but an arc-shaped bulge which is beneficial to forming the mixed gas inlet groove 32 is added on the surface of the mold, referring to figure 4, when the cutting torch rod seat 3 is molded, a left half mold 34 and a right half mold 35 are respectively adopted on the left side and the right side by taking a mold parting surface 33 as a boundary, therefore, when demolding is carried out, only the left half mold 34 is opened towards the left side, referring to the direction I in figure 4, the right half mold 35 is opened towards the right side, referring to the direction II in figure 4, by adopting the molding and demolding mode, the processing and molding mode of the mixed gas inlet 7 is simpler, the mold can be repeatedly used, the structure of the formed mixed gas inlet groove 32 has good consistency, and no other auxiliary tools or additional processing is required by the hole processing, is beneficial to the mass production of products. The mixed gas inlet channel 32 is avoided from being arranged on the parting plane 33 when designing the mould.

In this embodiment, each mixed gas inlet groove 32 is a curved groove, specifically, each mixed gas inlet groove 32 includes an arc-shaped groove hole with an opening facing outward, two opening ends of the arc-shaped groove hole are provided with mold release surfaces beneficial for mold release, the openings of the arc-shaped groove holes of the mixed gas inlet grooves 32 on the same side face outward, and the mold release surfaces of the mixed gas inlet grooves 32 on the same side are the same and parallel to the side direction; the demoulding face of all left mixed gas air inlet grooves 32 all is perpendicular with parting face 33, and the demoulding face of all mixed gas air inlet grooves 32 on same right side all is perpendicular with parting face 33, and the arc slotted hole of mixed gas air inlet groove 32 all is tangent with the demoulding face, and left mixed gas air inlet groove 32's opening and edge all face left side, right side promptly mixed gas air inlet groove 32's opening and edge all face the right side, do not appear the curved surface of colluding back. Referring to fig. 4, the left side and the right side are respectively provided with three mixed gas inlet grooves 32, the mixed gas inlet groove 32 in the middle is vertically symmetrical, and the mixed gas inlet grooves 32 in the upper part and the lower part are vertically symmetrical, so that the processing of the die is facilitated.

In the prior art, the cutting torch is mainly made of red copper and is machined by a numerical control machine, the cutting torch is insufficient in hardness and poor in wear resistance due to the fact that the copper material is soft, and in order to solve the problem, chromium is plated on the surface of the cutting torch outer sleeve 1 to improve the hardness, so that the cost is high and the operation is complex; therefore, the cutting torch outer sleeve 1 is a powder metallurgy outer sleeve, and the cutting torch core sleeve is a powder metallurgy core sleeve. The cutting torch outer sleeve 1 and the cutting torch core sleeve are processed and manufactured by adopting a powder metallurgy process, and the processing comprises the following specific steps:

(1) selecting metal powder meeting the requirements, selecting a binder according to the type of the metal powder, mixing the metal powder and the binder, and granulating to prepare a raw material suitable for injection molding, wherein in the embodiment, the metal powder is stainless steel powder;

(2) manufacturing a mold for injection molding according to the size and the structure of the cutting nozzle outer sleeve 1 and the cutting nozzle core sleeve, and injecting the raw materials into the mold by using an injection molding machine for molding;

(3) removing the binder in the product formed by the die by a chemical method or a heating decomposition method;

(4) sintering and densifying the product subjected to binder removal at high temperature to obtain a sintered product;

(5) carrying out post-treatment on the sintered product as required to obtain a final finished product;

the cutting torch core sleeve is complex in structure and comprises a cutting torch core rod 2, a cutting torch rod seat 3 and a cutting torch core head 4, and in order to ensure that demoulding is more convenient and smooth, a combined die is adopted during processing of the cutting torch core sleeve, namely a left half die 34, a right half die 35 and a lower half die, wherein the lower half die is used for forming the cutting torch core head 4, and the left half die 34 and the right half die 35 are matched for forming the cutting torch core rod 2 and the cutting torch rod seat 3; during forming and demolding, the left half die 34 is opened towards the left side, see direction I in fig. 3, the right half die 35 is opened towards the right side, see direction II in fig. 3, the lower half die is opened towards the front end, see direction III in fig. 3, a finished product formed by the method does not need to additionally process holes or gas guide grooves and the like, the processing method is simpler, the production efficiency is high, the consistency of the produced cutting nozzle is better, and each cutting nozzle core sleeve and the cutting nozzle outer sleeve 1 can be replaced mutually in the cutting nozzle assembling process; furthermore, the utility model discloses the cutting torch that forms is the stainless steel cutting torch, and hardness and the wearability of its structure etc. are all better, non-deformable, long service life.

Referring to fig. 3, 5, 6 and 7, the mixed gas outlet includes mixed gas guide grooves 41 arranged on the periphery of the cutting nozzle core head 4 and in an annular array, the mixed gas guide grooves 41 extend along the axial direction, a mixed gas guide strip 42 is formed between two adjacent mixed gas guide grooves 41, and the rear ends of the mixed gas guide grooves 41 are communicated with the mixed gas channel 6; the cutting torch core head 4 is provided with a core head positioning section 45 and a core head flow guide section 46, the core head flow guide section 46 is arranged at the front end of the core head positioning section 45, the core head positioning section 45 is in interference fit with the cutting torch outer sleeve 1, and the core head flow guide section 46 is in clearance fit with the cutting torch outer sleeve 1. In this embodiment, the total number of the mixed gas guide bars 42 is not less than 6, and may be 6, 8, 10 or more. Referring to fig. 2, the rear end of the mixed gas guide groove 41 is located behind the matching position between the mixed gas guide strip 42 and the cutting torch outer sleeve 1, that is, the rear end of the mixed gas guide groove 41 is not matched with the cutting torch outer sleeve 1 but communicated with the mixed gas channel 6 for realizing gas flow conduction, the front end of the mixed gas guide groove 41 extends to the front end of the cutting torch core head 4, and the depth of the mixed gas guide groove 41 is gradually increased from back to front in a conical surface shape and then is maintained until the end; the mixed gas in the mixed gas channel 6 firstly enters the mixed gas guide groove 41 from the rear end of the mixed gas guide groove 41, then moves forwards along the mixed gas guide groove 41, and is discharged from the front end outlet of the cutting nozzle outer sleeve 1.

When the mixed gas in the mixed gas channel 6 suddenly enters the mixed gas guide groove 41, the movement direction of the gas flow is disordered and disordered due to the change of the movement path of the mixed gas, and if no measures are taken, the gas flow continuously moves in the disordered way, so that the discharged gas flow has unstable and unsmooth gas outlet and the like, and the preheating and cutting effects are influenced; for solving this problem, the periphery of all mixed gas conducting bars 42 in the core head positioning section 45 constitutes jointly and is used for the fastening to be in core head positioning surface 43 on the cutting torch overcoat 1, the periphery of all mixed gas conducting bars 42 in the core head positioning section 46 constitute jointly with clearance fit's core head water conservancy diversion face 44 between the cutting torch overcoat 1, slick and sly transitional coupling between the mixed gas conducting bar 42 in core head positioning section 45 and the core head water conservancy diversion section 46. For convenience of description, all mixed gas guide bars 42 in the core print positioning section 45 are defined as positioning guide bars, and the peripheries of all the positioning guide bars jointly form a core print positioning surface 43, that is, all the positioning guide bars jointly form a positioning structure for being fastened in the cutting torch outer sleeve 1, so as to ensure the coaxiality of connection between the cutting torch core print 4 and the cutting torch outer sleeve 1; in the section, because all the positioning guide bars and the cutting nozzle outer sleeve 1 have no gap, any two adjacent mixed gas guide grooves 41 in the section are separated by the positioning guide bar positioned in the middle, so the mixed gas passing through the mixed gas guide grooves 41 in the core head positioning section 45 is mutually independent, a single gas beam is formed in each mixed gas guide groove 41 in the core head positioning section 45, the mixed gas moving to the core head positioning section 45 from the mixed gas channel 6 is forcedly separated into dispersed gas flows, the overall disordered and disordered gas flow is divided into a plurality of small gas flows, then the gas flows move along each mixed gas guide groove 41, and in the moving process, because the gas flows in each mixed gas guide groove 41 do not interfere with each other and each gas flow moves for a stroke independently, the gas flows in each mixed gas guide groove 41 can quickly, orderly and stably, at this time, the airflow entering the core head diversion section 46 is stable, and in order to avoid that the resistance is too large due to forced separation, the gas flow rate is reduced, the preheating effect is poor, and the discharged gas is not uniform due to too dispersed gas beams, so that the airflow which tends to be stable does not continue to be forcibly separated after entering the core head diversion section 46; the mixed gas entering the core head flow guide section 46 continues to move along the mixed gas guide grooves 41, and in the moving process, because gaps exist between each mixed gas guide strip 42 in the core head flow guide section 46 and the cutting nozzle outer sleeve 1, the section has no positioning function and only has a flow guide function, because the adjacent two mixed gas guide grooves 41 in the core head flow guide section 46 are not completely separated, the moving resistance between the gas flow and the mixed gas guide grooves 41 is reduced, the gas flow rate is higher than that in the prior art, the formed flame is long, and the preheating speed is increased; in addition, the gas guide strips 42 are communicated with the cutting nozzle outer sleeve 1 through gaps between the gas guide strips and the cutting nozzle outer sleeve 1, so that the mixed gas entering the core head guide section 46 moves in the respective mixed gas guide grooves 41, and a small part of the gas also moves in the gaps between the mixed gas guide strips 42 and the cutting nozzle outer sleeve 1, so that gas beams between two adjacent mixed gas guide grooves 41 are connected, the uniformity of the gas is improved, and the preheating and cutting quality is improved; the utility model discloses a core location section 45 constitutes a whole with core water conservancy diversion section 46, through core location section 45 can realize the effect of location and water conservancy diversion simultaneously with core water conservancy diversion section 46, has the air current simultaneously stable, the velocity of flow is fast and the air current advantage such as even.

The structures of all the mixed gas guide strips in the core head positioning section 45 are completely the same, and the structures of all the mixed gas guide strips in the core head flow guide section 46 are completely the same.

Furthermore, the front end of the cutting torch outer sleeve 1 is provided with a cylindrical hole matched with the cutting torch core head 4, the core head positioning surface 43 is a conical positioning surface which is retracted towards the front end, the conical positioning surface can be more conveniently positioned with the cylindrical hole of the cutting torch outer sleeve 1, and a cylindrical positioning surface can be adopted by demoulding, but the fixed assembly and installation effect of the conical positioning surface is slightly poorer than that of the conical positioning surface; the core head flow guide surface 44 is a cylindrical flow guide surface, the core head flow guide surface 44 is set to be a cylindrical structure, so that the movement of the air flow is still stable on the premise of ensuring uniform air flow mixing, a conical structure can be adopted, however, when the core head flow guide surface is in the conical structure, the gap between the core head flow guide surface 44 and the cylindrical hole of the cutting nozzle outer sleeve 1 can be gradually increased, and the air flow can be obviously changed at different positions.

Example two:

the second embodiment is basically the same as the first and third embodiments, and the difference is mainly the structure of the cutting nozzle core head 4: fig. 8 to 10, in this embodiment, the total number of the mixed gas guide bars is not less than 6, and may be 6, 8, 10 or more, at this time, the peripheries of at least three mixed gas guide bars 42 uniformly arranged in the core print positioning section 45 jointly form a core print positioning surface 43 for fastening on the cutting torch outer sleeve 1, and the rest of the mixed gas guide bars 42 in the core print positioning section 45 and all the mixed gas guide bars 42 in the core print guiding section 46 are in clearance fit with the cutting torch outer sleeve 1. For convenience of description, the mixed gas conducting bar 42 tightly fitted with the cutting torch outer sleeve 1 is defined as a positioning conducting bar, in this embodiment, four positioning conducting bars are uniformly arranged to realize supporting and positioning in all directions, referring to fig. 10, the peripheries of the positioning conducting bars form a core head positioning surface, and the four positioning conducting bars together form a positioning structure for being fastened in the cutting torch outer sleeve 1 to ensure the coaxiality of the connection between the cutting torch core head 4 and the cutting torch outer sleeve 1. Meanwhile, the rest of mixed gas guide bars 42 are in clearance fit with the cutting torch outer sleeve 1, the structure of the mixed gas guide bars is basically the same as that of a cutting torch core head 4 in the prior art, the difference from the prior art is only that positioning guide bars are arranged, the positioning guide bars not only have a positioning function, but also have the same function as the positioning guide bars in the first embodiment due to the fact that continuous gas flow is separated, the gas flow is dispersed and used for improving the order and stability of the gas flow, and meanwhile, the number of the positioning guide bars is small compared with that of the first embodiment, so that the gas flow movement resistance is small, the gas flow speed is high, and the preheating effect is good.

The structures of all the positioning guide bars in the core print positioning section 45 are completely the same, the structures of the other raised heads in the core print positioning section 45 are completely the same, and the structures of all the mixed gas guide bars in the core print flow guide section 46 are completely the same.

Example three:

the third embodiment is basically the same as the first and second embodiments, wherein the third embodiment is that another vertical positioning structure is added on the basis of other embodiments, as shown in fig. 11, the outer circumference of the cutting torch rod seat 3 is provided with an outer conical surface 31, and the rear end of the cutting torch outer sleeve 1 is provided with an inner conical hole which is matched with the outer conical surface 31; the outer conical surface 31 with still correspond on the fitting surface of interior taper hole and be provided with location circular bead 8, when can guaranteeing the installation through location circular bead 8, what cutting torch rod seat 3 can be accurate installs in cutting torch overcoat 1, make things convenient for the installer to operate.

The basic principles, main features and advantages of the present invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (8)

1. Cutting torch core cover for gas cutting torch, including the cutting torch core bar, its characterized in that: the rear part of the cutting torch core rod is provided with a cutting torch rod seat, the front end of the cutting torch core rod is provided with a cutting torch core head, and the cutting torch core rod, the cutting torch rod seat and the cutting torch core head are integrally formed; the periphery of cutting torch pole seat is provided with the outer conical surface that is used for quick installation, be provided with a plurality of gas mixture air inlet ducts on the outer conical surface.

2. The cutting tip core sleeve for a gas cutting torch according to claim 1, wherein: the mixed gas inlet grooves on two sides of the cutting nozzle rod seat are symmetrically arranged, the openings of the mixed gas inlet grooves on the same side face the same direction, and the opening directions of the mixed gas inlet grooves on two sides are opposite; the mixed gas inlet groove is a groove convenient for outward demoulding.

3. The cutting tip core sleeve for a gas cutting torch according to claim 1, wherein: the periphery of the cutting nozzle core head is provided with a plurality of mixed gas guide grooves in an annular array, and a mixed gas guide strip is formed between every two adjacent mixed gas guide grooves.

4. The cutting tip core sleeve for a gas cutting torch according to claim 3, wherein: the cutting nozzle core head is provided with a core head positioning section for fixed installation and a core head flow guide section for gas flow guide, and the core head flow guide section is arranged at the front end of the core head positioning section.

5. The cutting tip core sleeve for a gas cutting torch according to claim 4, wherein: the periphery of all mixed gas conducting bars in the core head positioning section jointly forms a core head positioning surface used for being fastened on the cutting nozzle outer sleeve, and the periphery of all mixed gas conducting bars in the core head flow guide section jointly forms a core head flow guide surface in clearance fit with the cutting nozzle outer sleeve.

6. The cutting tip core sleeve for a gas cutting torch according to claim 4, wherein: the periphery of at least three mixed gas conducting bars evenly arranged in the core head positioning section jointly forms a core head positioning surface used for being fastened on the cutting torch outer sleeve, and the rest mixed gas conducting bars in the core head positioning section and all the mixed gas conducting bars in the core head flow guide section are in clearance fit with the cutting torch outer sleeve.

7. The cutting tip core sleeve for a gas cutting torch according to claim 1, wherein: and the outer conical surface is also correspondingly provided with a positioning shoulder.

8. The cutting tip core sleeve for a gas cutting torch according to any one of claims 1 to 7, wherein: the cutting torch core rod, the cutting torch rod seat and the cutting torch core head are integrally formed into a cutting torch core sleeve, and the cutting torch core sleeve is a powder metallurgy core sleeve.

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