CN211638638U

CN211638638U - Novel plasma cutting and planing dual-purpose gun

Info

Publication number: CN211638638U
Application number: CN202020046310.8U
Authority: CN
Inventors: 戴平
Original assignee: Changzhou Qiluo Welding Technology Co ltd
Current assignee: Changzhou Qiluo Welding Technology Co ltd
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2020-10-09
Anticipated expiration: 2030-01-09

Abstract

The utility model belongs to the technical field of the plasma cutting technique and specifically relates to a novel plasma cuts, digs dual-purpose rifle, the utility model discloses a novel plasma cuts, digs dual-purpose rifle, through the length of extension cutting torch and protective sheath to carry out redesign vortex ring and cutting torch seat, solved conventional rifle and can't stretch the small-angle shanks small space and have suburb work and dig out the asymmetric problem of groove both sides shape. The structure of the cutting torch comprises an air pipe, an electrode assembly, a vortex ring, a cutting nozzle assembly and a handle assembly, wherein the vortex ring is provided with an inner cavity, a plurality of vortex holes are formed in the side wall of the lower part of the vortex ring, the air pipe penetrates into the electrode assembly, and a first air chamber is formed between the air pipe and the inner side of the electrode assembly; the vortex ring is sleeved and fixed on the outer side wall of the electrode seat, a second air chamber is formed between the cutting nozzle seat and the vortex ring, a third air chamber is formed between the cutting nozzle assembly and the electrode assembly, the handle assembly is fixedly arranged on the outer side of the cutting nozzle seat through a protective sleeve, and the length L of the cutting nozzle is 34-90 mm.

Description

Novel plasma cutting and planing dual-purpose gun

Technical Field

The utility model belongs to the technical field of the plasma cutting technique and specifically relates to a novel dual-purpose rifle is cut, dug to plasma.

Background

Plasma cutting is a processing method that partially melts (and evaporates) metal at a notch of a workpiece by using heat of a high-temperature plasma arc, removes the molten metal by momentum of high-speed plasma, and forms a notch cutting seam along with movement of a cutting nozzle.

Since the invention of 20 th and 50 th ages, the plasma cutting has high cutting speed (5-6 times of that of oxygen acetylene cutting at that time) and the capability of cutting various metals, and simultaneously has the advantages of smooth and clean cutting surface, thermal deformation, small cutting seam and the like, so the plasma cutting method is rapidly widely applied to industries such as automobiles, pressure vessels, natural gas pipelines, nuclear industry, shipbuilding and the like, the technology is more developed in the future, and the technology basically replaces the oxygen cutting method on one hand from the early stage that very expensive argon-hydrogen mixed gas must be used, to 80-90 th year hafnium wire and oxygen are added into plasma gas, to 2000 to the present 'fine plasma' age, and on the other hand, compared with laser, the plasma cutting method has low production cost (tens of thousands to hundreds of thousands per platform of plasma cutting machines, tens of millions of laser cutting machines per platform) and the potential that the cutting quality and speed can be further improved The strength space is popular with users.

The cutting equipment mainly comprises: the cutting torch consists of four parts, including power supply, control box, cutting torch and water path and gas path system, and includes cutting nozzle insulated from electrode and adhered to workpiece, electrode connected to the positive end of the cutting power supply, high frequency and high voltage current applied to the electrode connected to the negative end of the power supply to spray electric arc, plasma arc formed under the action of voltage, pressure and magnetic field, great current maintained to burn the plasma arc stably, cutting nozzle raised slightly to avoid damage to the cutting nozzle, and gas pipe with pressure of 0.3-0.6MPa entering the gas pipe from the top of the torch to the joint part between the gas pipe and the electrode and entering the gas distributing chamber via four holes in the electrode seat, the gas flow is made to vertically downwards reach the joint of the electrode and the cutting nozzle along the inner wall of the cylinder, where the gas is split into plasma by the arc jetted from the electrode, and then plasma arc with very high temperature is formed under the action of high frequency, high voltage current and magnetic field and jetted from the cutting nozzle, the temperature at the outlet reaches 8000 deg.c and the speed is 800-. The other path of the gas enters the cutting torch seat to be used as protective gas (also playing a cooling role), enters a space formed by the cutting torch and the protective sleeve through holes uniformly distributed on the circumference of the cutting torch seat, and is guided by the protective sleeve to enable the gas to be sprayed out along the taper direction of the cutting torch, so that the gas plays a role of compressing the sprayed plasma arc.

Along with the fact that the manufacturing industry in China is transformed from semi-precision to high-precision strong force and grows reversely, the field and the range of the plasma cutting application are wider and wider, meanwhile, the using environment is worse and worse, and the requirements of users are higher and higher, so that a lot of market segmentation and cutting guns are generated, the conventional gun in the current market extends into a narrow space (as shown in figure 1), and the cutting gun cannot cut effectively because the distance from the cutting nozzle to a crater exceeds the effective working distance of a plasma arc, and even if the cutting gun is cut forcibly, the effect is that the surface is uneven, the shape is irregular and the use requirements of the users cannot be met; the section of a groove which cannot be planed by the conventional gun is in a symmetrical circular arc shape (as shown in fig. 3), and the groove is in an incomplete circular arc shape with two asymmetric sides, so that residual internal stress is generated due to uneven material shrinkage in the cooling process after welding, and the deformation and the strength of a welded workpiece are reduced.

SUMMERY OF THE UTILITY MODEL

In order to solve the conventional rifle on the existing market and stretch to such narrow and small space, because of the distance of cutting torch to the crater surpasses plasma arc's effective working distance, therefore can't effectively dig and cut, even dig the cutting by force, the surface is unsmooth, the shape is anomalous dysmorphism, can't reach user's operation requirement's problem far away, the utility model provides a novel plasma cutting, dig dual-purpose rifle, because the length of extension cutting torch, nevertheless through the design of vortex ring, cutting torch seat, overcome because the electric arc that cutting torch length extension brought is unstable, indiscriminate discharge, plasma arc breaking, burn out a series of problems such as cutting torch and electrode, obtained a novel plasma cutting, dig dual-purpose rifle, can effectively increase the air current, the working distance and the cooling effect of extension air current

The utility model provides a technical scheme that its technical problem adopted is:

a novel plasma cutting and planing dual-purpose gun comprises:

the air pipe is connected with the air pipe,

the electrode assembly comprises an electrode holder and an electrode, the electrode holder is provided with an inner cavity, the side wall of the upper part of the electrode holder is provided with a plurality of air holes, the inner part of the electrode is provided with the cavity with an opening at one end and is fixedly connected with the lower end of the electrode holder, the electrode holder and the electrode form the electrode assembly with an opening at the upper end,

the vortex ring is provided with an inner cavity, a first step is formed at the upper part in the vortex ring, a plurality of downward airflow holes are formed on the surface of the first step, a second step is formed at the upper part in the vortex ring, a plurality of vortex holes are formed on the side wall of the lower part of the vortex ring,

the cutting torch component comprises a cutting torch seat and a cutting torch, a plurality of downward air outlet holes communicated with the inner cavity of the cutting torch seat are formed on the outer side of the cutting torch seat, the lower end of the cutting torch is conical, a plasma arc channel is formed on the inner side wall, the upper end of the cutting torch is fixedly connected with the cutting torch seat,

a handle component, the handle component comprises a handle and a protective sleeve which are fixedly connected,

the gas pipe penetrates into the electrode assembly, the top of the gas pipe is fixedly connected with the top of the electrode holder, the bottom of the gas pipe is positioned in the electrode, and a first gas chamber is formed between the gas pipe and the inner side of the electrode assembly; the cutting nozzle assembly is sleeved on the outer sides of the electrode and the vortex ring and is fixedly connected with the vortex ring through the cutting nozzle seat, a second air chamber is formed between the cutting nozzle seat and the vortex ring, a third air chamber is formed between the cutting nozzle assembly and the electrode assembly, the second air chamber and the third air chamber are communicated through the vortex hole, and the second air chamber is communicated with the outside through an air outlet hole; the handle assembly is fixedly arranged on the outer side of the cutting nozzle seat through a protective sleeve;

the length L of the cutting nozzle is 34-90 mm.

Preferably, the length L of the cutting tip is 36-90 mm.

Preferably, the length L of the cutting tip is 40-90 mm.

Preferably, 5-8 air outlet holes are formed on the outer side of the cutting nozzle seat.

Preferably, the included angle alpha between the vortex hole and the horizontal plane is 3-5 degrees.

Preferably, the included angle alpha between the vortex hole and the horizontal plane is 4 degrees.

Preferably, the diameter of the vortex hole is 0.65-0.8 mm.

Preferably, the number of the vortex holes is 8-14.

Preferably, the direction of the vortex holes is the direction of the axis of the non-vortex ring.

Preferably, the direction of the vortex hole is a tangential direction of the electrode holder.

Preferably, the cutting nozzle is also provided with an extension protective sleeve.

The utility model has the advantages that:

(1) the utility model discloses a novel dual-purpose rifle is cut, dug in plasma has prolonged the length of cutting torch, can reach in the space of corners (like fig. 2) such as small-angle, narrow and small, effectively dig, cut. The effect is excellent: the arc of the groove is symmetrical, smooth and smooth, and the service life of the cutting gun is prolonged and meets the use requirements of users;

(2) the utility model discloses a novel plasma cuts, dig dual-purpose rifle, through the tangential direction along that sets up at the vortex ring, have the vortex hole of downward angle, make the air current carry out strong down-spin formation along the cylinder inner wall and compare the more violent vortex (the swirl that the urgent department of rivers formed is liked to its shape, more like tornado) downwards to the joint portion of electrode and cutting torch, such air current has not only compensatied the velocity loss that causes because of the cutting torch extension even stronger, thereby the working distance of air current has been prolonged, overcome because the not enough problem of air current working distance that the increase of cutting torch length brought, the air current is loose and the instability has been solved, and then the emergence electric arc unstability and indiscriminate discharge phenomenon have been avoided.

(3) The utility model discloses a novel plasma cuts, digs dual-purpose rifle sets up the increase of vortex hole quantity through the vortex ring, makes the interval in vortex ring hole reduce, therefore the air current density who gets into the vortex ring increases, and the air current distributes more evenly, and then has strengthened the density and the homogeneity of plasma arc to the circular arc homogeneity and the symmetry of groove shape are dug out in the assurance.

(4) The utility model discloses a novel dual-purpose rifle is cut, dug in plasma sets up the increase of venthole quantity through the cutting torch seat, has increased gas flow and cooling gas volume on the one hand, has improved the cooling effect, has effectively avoided burning out cutting torch and electrode etc. has improved the life of cutting torch. On the other hand, the distribution density of the air flow on the circumference is increased, and more uniform protective air flow can more effectively compress and protect the plasma arc, so that the bevel planed during the work is more uniform, dense, and smoother

Drawings

The present invention will be further explained with reference to the drawings and examples.

FIG. 1 is a schematic view of a conventional gun gouging;

FIG. 2 is a schematic view of a novel plasma cutting and planing dual-purpose gun of the present invention;

FIG. 3 is a schematic view of a conventional gun planing shape;

FIG. 4 is a schematic diagram of the cutting shape of the novel plasma cutting and planing dual-purpose gun of the present invention;

FIG. 5 is a schematic structural view of a novel plasma cutting and planing gun of the present invention;

FIG. 6 is a cross-sectional view of the swirl ring of the present invention;

FIG. 7 is a sectional view taken along line A-A of FIG. 6;

FIG. 8 is a cross-sectional view of the cutting torch holder of the present invention;

FIG. 9 is a sectional view taken along line B-B of FIG. 8;

in the figure: 1. the gas pipe 21, the electrode holder 22, the electrode 23, the gas vent 31, the vortex ring 32, the first step 33, the gas flow hole 34, the second step 35, the vortex hole 41, the cutting nozzle holder 42, the cutting nozzle 43, the gas outlet hole 51, the handle 52, the protective sleeve 53, the extension protective sleeve 61, the first gas chamber 62, the second gas chamber 63, the third gas chamber 71, the workpiece 72, the crater 73 and the cutting shape.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 5-9, a novel plasma cutting and planing gun comprises:

the air pipe 1 is provided with a plurality of air holes,

an electrode 22 assembly, the electrode 22 assembly comprises an electrode base 21 and an electrode 22, the electrode base 21 has an inner cavity, the upper side wall is provided with a plurality of air holes 23, the electrode 22 is internally provided with a cavity with an opening at one end and is fixedly connected with the lower end of the electrode base 21, the electrode base 21 and the electrode 22 form the electrode 22 assembly with an opening at the upper end,

the vortex ring 31, the vortex ring 31 has an inner cavity, a first step 32 is formed on the upper part in the vortex ring 31, a plurality of downward airflow holes 33 are formed on the surface of the first step 32, a second step 34 is formed on the upper part in the vortex ring 31, a plurality of vortex holes 35 are formed on the side wall of the lower part of the vortex ring 31,

a cutting torch component, the cutting torch component comprises a cutting torch seat 41 and a cutting torch 42, a plurality of downward air outlet holes 43 communicated with the inner cavity of the cutting torch seat 41 are formed on the outer side of the cutting torch seat 41, the lower end of the cutting torch 42 is conical, a plasma arc channel is formed on the inner side wall, the upper end of the cutting torch 42 is fixedly connected with the cutting torch seat 41,

a handle assembly, the handle assembly comprises a handle 51 and a protective sleeve 52 which are fixedly connected,

the air pipe 1 penetrates into the electrode 22 assembly, the top of the air pipe 1 is fixedly connected with the top of the electrode seat 21, the bottom of the air pipe 1 is positioned in the electrode 22, and a first air chamber 61 is formed on the inner side of the air pipe 1 and the electrode 22 assembly; the vortex ring 31 is sleeved and fixed on the outer side wall of the electrode seat 21, the air holes 23 are communicated with the airflow holes 33, the cutting nozzle assembly is sleeved on the outer sides of the electrode 22 and the vortex ring 31 and fixedly connected with the vortex ring 31 through the cutting nozzle seat 41, a second air chamber 62 is formed between the cutting nozzle seat 41 and the vortex ring 31, a third air chamber 63 is formed between the cutting nozzle assembly and the electrode 22 assembly, the second air chamber 62 is communicated with the third air chamber 63 through the vortex holes 35, and the second air chamber 62 is communicated with the outside through the air outlet 43; the handle assembly is fixedly arranged on the outer side of the cutting nozzle base 41 through a protective sleeve 52; the length L of the cutting tip 42 is 34-90 mm.

In one embodiment, the length L of the cutting tip 42 is 36-90 mm. In this embodiment, the length L of the cutting tip 42 is preferably 90 mm. Of course, the length of the cutting nozzle 42 can be switched according to actual requirements, and is 40mm, 50mm, 60mm, 70mm and 80 mm.

In one embodiment, 5-8 air outlet holes 43 are formed on the outer side of the cutting nozzle base. In this embodiment, 6 air outlet holes 43 are formed on the outer side of the cutting nozzle base, and the diameter of the air outlet hole 43 is 1 mm.

In one embodiment, the swirl holes 35 are angled from 3 to 5 ° from the horizontal. In this embodiment, the swirl holes 35 are at an angle α of 4 ° to the horizontal

In one embodiment, the vortex holes 35 have a pore size of 0.65 to 0.8 mm. In this embodiment, the diameter of the vortex hole 35 is 0.8mm

In one embodiment, the number of swirl holes 35 is 8-14. In one embodiment, the number of swirl holes 35 is 12

In one embodiment, the direction of swirl holes 35 is the direction of the axis of non-vortex ring 31. In order to increase the formation of the gas flow, in this embodiment, the direction of the swirl holes 35 is the tangential direction of the electrode holder 21.

In one embodiment, the cutting tip 42 is provided with an extension sleeve 53. The gas between the elongate sheath 53 and the cutting tip 42 can be delivered to the outside of the plasma arc, effectively isolating the plasma arc from the outside and acting as a shielding gas.

The utility model relates to a novel dual-purpose rifle theory of operation is cut, dug to plasma:

the pressure gas with 0.3-0.6Mpa enters the trachea 1 from the top of the gun through the gas transmission pipe and goes down to the joint part of the trachea 1 and the electrode 22, goes up along the first gas chamber 61 between the trachea 1 and the electrode 22, enters the airflow hole 33 through the air holes 23 on the electrode seat 21, divides the gas into two paths in the second gas chamber 62, one path of the gas enters the third gas chamber 63 through the eddy hole 35 as the ion gas, and forms stronger downward rotation (compared with the conventional eddy ring) along the inner wall of the cylinder through the eddy holes 35 which are uniformly distributed along the tangential direction of the side surface of the cylinder on the eddy ring 31 and have downward angles to form eddy (the shape is similar to the eddy formed at the position where the water flow is fast and is more similar to the tornado) to the joint part of the electrode 22 and the cutting nozzle 42, the gas is split into plasma due to the electric arc sprayed by the electrode 22, and then forms plasma arc with extremely high frequency, high voltage current and magnetic, the cutting fluid is sprayed out from the opening of the cutting nozzle 42, the temperature at the outlet is 8000 ℃, the speed is 800-. The other path enters the cutting nozzle base 41 to be used as protective gas (also playing a cooling role), enters a space formed by the cutting nozzle 42 and the protective sleeve 52 through the air outlet holes 43 uniformly distributed on the circumference of the cutting nozzle base 41, and is guided by the protective sleeve 52 to enable the gas to be sprayed out along the taper direction of the cutting nozzle 41, so that the sprayed plasma arc is compressed. When the cutting nozzle 42 is lengthened, the gas can be sprayed out along the taper direction of the cutting nozzle 41 by adopting the guidance of the lengthening protective sleeve 53, and the sprayed plasma arc is compressed.

Application example 1

(1) As shown in fig. 1, using a conventional gun currently on the market, a crater between two workpieces 71 with a small included angle is planed and extended into a narrow space (as shown in fig. 1), and the distance from a cutting tip to the crater exceeds the effective working distance of a plasma arc, so that effective planing cannot be performed.

(2) As shown in figure 2, use the utility model discloses a novel dual-purpose rifle is cut, dug to plasma cuts, digs the scar between two work pieces 71 that the contained angle is less and cuts, has prolonged the length of cutting torch, can stretch in narrow and small space (as figure 2), because of the cutting torch to the effective working distance of distance at plasma arc of scar, can accomplish effectively dig and cut, the effect is excellent, level and smooth, has reached user's operation requirement.

Application example 2

(1) As shown in fig. 3, when a conventional gun on the market is used to plane two workpieces 71 to be welded, the plane shape 73 is an asymmetric arc shape as shown in fig. 3, which may cause asymmetric welding stress at the welded interface and cause the welded workpieces to be weak.

(2) As shown in FIG. 4, the utility model discloses a novel dual-purpose gun is cut, dug to plasma cuts two work pieces 71 that need the welded and cuts, and it digs cuts shape 73 as shown in FIG. 4, and the shape of very close symmetry circular arc, the stress symmetry that welded interface produced, the welding fastness is high, has higher reliability.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a novel dual-purpose rifle is cut, dug to plasma which characterized in that includes:

the air pipe is connected with the air pipe,

the length L of the cutting nozzle is 34-90 mm.

2. A novel plasma cutting and planing gun as claimed in claim 1, wherein: the length L of the cutting nozzle is 36-90 mm.

3. A novel plasma cutting and planing gun as claimed in claim 2, wherein: 5-8 air outlet holes are formed on the outer side of the cutting nozzle seat.

4. A novel plasma cutting and planing gun as claimed in claim 1, wherein: the included angle alpha between the vortex hole and the horizontal plane is 3-5 degrees.

5. The novel plasma cutting and planing gun as claimed in claim 4, wherein: the included angle alpha between the vortex hole and the horizontal plane is 4 degrees.

6. A novel plasma cutting and planing gun as claimed in claim 1, wherein: the aperture of the vortex hole is 0.65-0.8 mm.

7. The novel plasma cutting and planing gun as claimed in claim 6, wherein: the number of the vortex holes is 8-14.

8. A novel plasma cutting and planing gun as claimed in claim 1, wherein: the direction of the vortex holes is the direction of the axis of the non-vortex ring.

9. A novel plasma cutting and planing gun as claimed in claim 1, wherein: the direction of the vortex hole is the tangential direction of the electrode holder.

10. A novel plasma cutting and planing gun as claimed in claim 1, wherein: an extension protective sleeve is arranged outside the cutting nozzle.