CN214046097U - Linear plasma treatment spray gun - Google Patents

Abstract

The utility model discloses a linear plasma handles spray gun, linear plasma handles spray gun includes constitutional unit, rifle body unit and electrode unit, constitutional unit's structural style is the stock of a gun of taking the shell, the structural style of rifle body unit is the seal chamber who takes the nozzle, electrode unit adopts the outside conical structure that has insulator arrangement. The utility model discloses a device is according to the different changes and the assorted nozzle of processing width of breadth of required processing product width, under low pressure state, working gas between electrode unit and the seal chamber takes place to stabilize glow discharge and forms reaction gas, and reaction gas passes the inside air flue of nozzle and forms rotatory air current, accomplishes the linear plasma processing to the target product. The utility model discloses a device utilizes the particularity of nozzle structure to change the injection mode of reaction gas for this device can improve the homogeneity of the plasma that erupts, can enlarge the processing width again.

Description

Linear plasma treatment spray gun

Technical Field

The utility model belongs to the technical field of the technique that plasma handled and specifically relates to a linear plasma handles spray gun.

Background

With the rapid development of high-performance structural material technology and advanced material processing technology, people put higher demands on toughness, rigidity, environmental protection, recycling property, service life and the like of materials. Therefore, a technology for improving the performance of various aspects of materials by treating the surface of the materials to change the properties of the surface of the materials, such as morphology, chemical composition, and texture, has been rapidly developed in recent years. Among various surface treatment methods such as physical treatment, chemical treatment, mechanical treatment and the like, the plasma surface treatment technology is rapidly developed due to the advantages of high cleaning efficiency, low energy consumption, no waste and the like. At present, aiming at different industrial applications, the plasma treatment technology under different conditions has obvious division of labor, large-area natural or synthetic materials needing continuous treatment are generally treated by normal-pressure plasma, and semiconductors, biomedical materials and the like are generally treated by low-pressure plasma.

In the prior art, a direct-injection plasma linear processing device adopts a nozzle with a point-injection or rotary-injection function, and an electrode in the processing device is connected with a high-frequency high-voltage power supply through a high-frequency cable so as to realize stable glow discharge under a low-voltage condition, thereby generating plasma to process a target product.

Chinese patent (CN201821550287.5) discloses a direct injection type atmospheric low-temperature plasma processor, which comprises a processing spray gun, wherein the processing spray gun comprises a spray gun nozzle, a shell, an electrode, a rotating airflow wheel, a fixed support, a fixed terminal, a plasma power supply and an air source, the air generates rotating airflow through the rotating airflow wheel, and the plasma on the electrode is more effectively sprayed out, so that the loss of the plasma is reduced, and the efficiency is improved. The utility model discloses a can be according to the overall dimension and the treatment effect requirement of handling the test piece, nimble adjusting device size and processing technology, and handle in the ordinary pressure air, low in processing cost, efficient. However, the spray gun nozzle adopted by the device has a single-hole structure, and the target product is subjected to plasma treatment by a spot spray treatment mode, which has small treatment area and limited uniformity.

Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a direct injection plasma processing apparatus which achieves the technical effects of uniform processing effect and increased processing width when processing a target product by linear plasma by changing the structural form of a torch nozzle in addition to the conventional direct injection plasma processing apparatus.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide a linear plasma processing torch, which employs a direct injection linear processing method, and has a flow path in a nozzle designed to have a plurality of nozzle ports, and which has a plurality of nozzle ports adjusted to have different directions to generate a swirling air flow, thereby achieving the technical effects of improving uniformity of injected plasma and widening a processing width.

In order to achieve the above object, the present application provides the following technical solutions.

A linear plasma processing spray gun comprises a structural unit, a gun body unit and an electrode unit, wherein the structural unit is a gun seat with a shell and used for bearing the gun body unit and placing a high-frequency cable and a working gas transmission pipeline;

the nozzle is in a combined structure form, the front end of the nozzle is in a structure with an air passage arranged inside, the number of air inlet openings of the air passage is one, the number of air outlet openings of the air passage is a plurality, the rear end of the nozzle is in a cylindrical sleeve structure form, the direction of the air outlet opening positioned in the center of the nozzle is the right front, the direction of the air outlet opening far away from the center of the nozzle is inclined towards the center of the nozzle, the inclination degree is larger as the distance from the center of the nozzle is farther, the inclination degree is adjusted according to the plasma processing width of each air passage outlet, the edges of plasma processing areas of two adjacent air passage outlets are mutually overlapped, and the uniformity of plasma processing is ensured;

the structure unit comprises a gun seat and a shell, wherein the shell comprises a gun seat cover and a thin plate, the gun seat is arranged at the rear end of the linear plasma processing spray gun, the gun seat cover is arranged above the gun seat, the gun seat cover is connected with the gun seat, the thin plate is arranged behind the gun seat, and the thin plate is connected with the gun seat;

the gun body unit comprises a sealed cavity and a nozzle, the sealed cavity comprises a gun body tail end and a gun body shell, the gun body tail end is arranged above a gun seat and connected with the gun seat, the gun body shell is arranged in front of the gun body tail end and connected with the gun body tail end, the nozzle is arranged in front of the gun body shell, and the nozzle is connected with the gun body shell;

the electrode unit comprises an insulating sleeve, an electrode seat, an electrode and an electrode lead, wherein the insulating sleeve is arranged in the gun body shell, the insulating sleeve is connected with the tail end of the gun body, the electrode seat is arranged in the gun body shell, the electrode seat is connected with the insulating sleeve, the electrode lead is arranged behind the electrode seat, the electrode is arranged in front of the electrode seat, and the electrode, the electrode seat and the electrode lead are connected;

preferably, both sides and the rear of rifle seat all are provided with the screw hole, the upper surface of rifle seat is provided with the through thread hole, rifle seat lid is connected with the rifle seat, the sheet metal is connected with the rifle seat.

Preferably, the tail end of the gun body is provided with a threaded hole which penetrates through the threaded hole in the vertical direction, the tail end of the gun body is connected with the gun seat, the inner diameter of the rear end of the gun body shell is matched with the outer diameter of the front end of the tail end of the gun body, the gun body shell is connected with the tail end of the gun body, the outer diameter of the rear end of the nozzle is matched with the inner diameter of the front end of the gun body shell, and the nozzle is connected with the gun body shell;

furthermore, the linear plasma processing spray gun adopts a mode of additionally arranging the nozzle assembling blocks to add balance weights for the nozzle so as to ensure the balance of the spray gun when in use, and the nozzle assembling blocks are arranged outside the air passage outlet and have the same number as the air passage outlet;

preferably, the outer diameter of the insulating sleeve is matched with the inner diameter of the front end of the gun body tail end, the insulating sleeve is connected with the gun body tail end, the electrode holder is of a disc structure with a hole in the middle, a plurality of through holes are formed in the periphery of the electrode holder, the through holes are arranged at equal intervals in an inclined mode along the circumferential direction of the electrode holder, the outer diameter of the electrode holder is matched with the inner diameter of the insulating sleeve, the electrode holder is connected with the insulating sleeve, the shape of the front end of the electrode lead is matched with the shape of the hole in the middle of the electrode holder, the front end of the electrode lead penetrates through the inside of the electrode holder, and a threaded hole is formed in the electrode;

furthermore, the electrode holder and the electrode lead are connected, the front end of the electrode lead penetrates through the middle of the electrode holder, the electrode holder and the electrode are pressed tightly by the rear end of the electrode lead, a small screw penetrates through a threaded hole formed in the electrode, and the front end of the small screw abuts against the front end of the electrode lead to position and lock the electrode, the electrode holder and the electrode lead.

The application has the advantages and effects as follows:

(1) the utility model discloses an among the linear plasma treatment spray gun, utilize the nozzle to change gaseous injection form, the air flue design in the nozzle is for many spouts, through adjusting each spout for not equidirectional rotatory air current of manufacturing, has improved plasma spraying's homogeneity and width greatly, and plasma treatment width can reach 50mm the biggest.

(2) The utility model discloses an among the linear plasma treatment spray gun, the nozzle adopts mechanical connection's form with rifle body shell, and it is very convenient that the installation is dismantled, makes things convenient for operating personnel to change the nozzle at any time according to the difference of required processing product, has improved greatly the suitability of spray gun.

(3) The utility model discloses an among the linear plasma treatment spray gun, the electrode holder of adoption is provided with a plurality of through-hole along the circumference slope, and working gas passes through the electrode holder and forms rotatory air current, sprays away the plasma of each position in the spray gun from the nozzle, has reduced the loss of plasma, has improved the utilization ratio of plasma greatly.

(4) The utility model discloses an among the linear plasma treatment spray gun, the electrode unit of being connected with the power sets up inside rifle body shell, is provided with insulating cover between electrode unit and the rifle body shell, guarantees the insulating nature of spray gun external surface, has improved greatly the security performance of spray gun during operation.

The foregoing description is only an overview of the technical solutions of the present application, so that the technical means of the present application can be more clearly understood and the present application can be implemented according to the content of the description, and in order to make the above and other objects, features and advantages of the present application more clearly understood, the following detailed description is made with reference to the preferred embodiments of the present application and the accompanying drawings.

The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a perspective view of a linear plasma processing torch according to an embodiment of the present disclosure;

FIG. 2 is a rear view of a linear plasma processing torch according to an embodiment of the present disclosure;

FIG. 3 is a perspective view of a sealed chamber of a plasma processing torch according to an embodiment of the present disclosure;

FIG. 4 is a cross-sectional view of a sealed chamber of a plasma processing torch according to an embodiment of the present disclosure;

FIG. 5 is a cross-sectional view of an electrode unit of a plasma processing torch according to an embodiment of the present application;

FIG. 6 is a perspective view of a nozzle of a plasma processing torch according to an embodiment of the present disclosure;

fig. 7 is a cross-sectional view of a nozzle of a plasma processing torch according to an embodiment of the present application.

The gun comprises a gun base 1, a gun base cover 2, a thin plate 3, a gun body tail end 4, a gun body shell 5, a nozzle 6, an insulating sleeve 7, an electrode base 8, an electrode lead 9 and an electrode 10.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. In the following description, specific details such as specific configurations and components are provided only to help the embodiments of the present application be fully understood. Accordingly, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, descriptions of well-known functions and constructions are omitted in the embodiments for the sake of clarity and conciseness.

It should be appreciated that reference throughout this specification to "one embodiment" or "the embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearances of the phrase "one embodiment" or "the present embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, B exists alone, and A and B exist at the same time, and the term "/and" is used herein to describe another association object relationship, which means that two relationships may exist, for example, A/and B, may mean: a alone, and both a and B alone, and further, the character "/" in this document generally means that the former and latter associated objects are in an "or" relationship.

Further, the present application may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion.

Example 1

This embodiment will mainly describe the basic composition and connection relationship of a linear plasma processing torch according to the present invention.

As shown in fig. 1, which shows a perspective view of a linear plasma processing torch, the linear plasma processing torch provided by the embodiment of the present application comprises a structural unit, a gun body unit and an electrode unit, wherein the structural unit is in the form of a gun base 1 with a housing, and is used for bearing the gun body unit and placing a high-frequency cable, a working gas transmission pipeline and the like, the structural unit is in the form of a sealed cavity with a nozzle 6, is used for bearing the electrode unit and is used as a negative pole of the linear plasma processing torch, the electrode unit (not shown in the figure) adopts a conical structure with an insulating device at the outer part, and is connected with a high-frequency high-voltage power supply and is used as a positive pole of the linear plasma processing torch.

As shown in fig. 6, which shows a perspective view of a nozzle of a plasma processing torch, as shown in fig. 7, which shows a cross-sectional view of the nozzle of the plasma processing torch, in conjunction with fig. 6 and 7, the nozzle 6 adopts a combined structure, the front end of the nozzle is a structure in which an air passage is arranged, the air inlet of the air passage is one, the air outlet of the air passage is a plurality of air outlets, the rear end of the air passage is a cylindrical sleeve structure, the outer diameter of the sleeve at the rear end of the nozzle 6 is matched with the inner diameter of the sleeve at the front end of the gun body housing 5, and the nozzle 6 and the gun body housing 5 are mechanically connected and screwed by threads.

Furthermore, the direction of the air passage outlet positioned in the center of the nozzle is right ahead, the direction of the air passage outlet far away from the center of the nozzle inclines towards the center of the nozzle, the inclination degree is larger as the distance from the center of the nozzle is farther, the inclination degree is adjusted according to the plasma processing width of each air passage outlet, the edges of the plasma processing areas of two adjacent air passage outlets are mutually overlapped, and the uniformity of plasma processing is ensured.

As shown in fig. 2, which shows a rear view of a linear plasma processing torch, with reference to fig. 1 and 2, the structural unit includes a gun base 1 and a housing, the housing includes a gun base cover 2 and a thin plate 3, the gun base 1 is disposed at the rear end of the linear plasma processing torch, the gun base cover 2 is disposed above the gun base 1, the gun base cover 2 is connected with the gun base 1, the thin plate 3 is disposed behind the gun base 1, and the thin plate 3 is connected with the gun base 1.

Further, the gun platform 1 adopts the structural style that the cross-section is "L" type, the long limit of "L" type is as the bottom surface of gun platform 1, the minor face of "L" type sets up in the front end of gun platform 1, and the side of the long limit of gun platform 1 is provided with the screw hole, the upper surface of the minor face of gun platform 1 is provided with the through thread hole.

Furthermore, the gun seat cover 2 adopts a structural form that the cross section is n-shaped, the lower parts of the left side and the right side of the gun seat cover 2 are respectively provided with a plurality of threaded holes, and the gun seat cover 2 and the gun seat 1 are mechanically connected and are positioned and locked by small screws and the threaded holes.

Further, sheet metal 3 adopts the rectangular plate structural style of centre trompil, and the shape of the centre trompil on the sheet metal 3 is circular, 3 lower parts of sheet metal are provided with a plurality of screw hole, sheet metal 3 and rifle seat 1 adopt mechanical connection's mode, through little screw and screw hole location locking.

As shown in fig. 3, which shows a perspective view of a seal chamber of a plasma processing torch, as shown in fig. 4, which shows a cross-sectional view of the seal chamber of the plasma processing torch, with reference to fig. 3 and 4, the gun body unit includes a seal chamber and a nozzle 6, the seal chamber includes a gun body tail end 4 and a gun body housing 5, the gun body tail end 4 is disposed above the front end of the gun base 1, the gun body tail end 4 is connected with the gun base 1, the gun body housing 5 is disposed in front of the gun body tail end 4, the gun body housing 5 is connected with the gun body tail end 4, the nozzle 6 is disposed in front of the gun body housing 5, and the nozzle 6 is connected with the gun body housing 5.

Further, rifle body tail end 4 adopts the integrated configuration form, and the front end is cylindrical sleeve, and the rear end is the structure of threaded hole, the threaded hole is for setting up the vertical direction through thread hole in cuboid top. The gun body tail end 4 and the gun base 1 are mechanically connected, and a threaded hole penetrates through the gun body tail end 4 and the gun base 1 in the vertical direction through the inner hexagonal socket head cap screw to be positioned and locked.

Further, 4 backs at rifle body tail end are provided with two round holes that run through, and plasma treatment spray gun is inside to be communicated with the external world through above-mentioned round hole, and the high frequency cable of being connected with high frequency high voltage power supply (not shown in the figure) passes from one of them round hole, and the trachea of being connected with vacuum pump, working gas injection device (not shown in the figure) passes from another round hole in, is provided with sealing device between round hole and high frequency cable, the trachea, sealing device is known in the art, the utility model discloses the common general knowledge is not repeated.

Further, the gun body shell 5 adopts a combined structure, the front end of the gun body shell is a cylindrical sleeve, the rear end of the gun body shell is a cylindrical sleeve with a larger diameter, the middle of the gun body shell is a circular truncated cone-shaped sleeve connected with the front end and the rear end of the gun body shell, the inner diameter of the rear end of the gun body shell 5 is matched with the outer diameter of the cylindrical sleeve at the tail end 4 of the gun body, and the gun body shell 5 and the tail end 4 of the gun body are mechanically connected and screwed down through threads.

Furthermore, the linear plasma treatment spray gun adopts a mode of additionally arranging the nozzle assembling blocks to add balance weights for the nozzle 6 so as to ensure the balance of the spray gun when in use, and the nozzle assembling blocks are arranged outside the air passage outlet and have the same number as the air passage outlet.

As shown in fig. 5, it shows a cross-sectional view of an electrode unit of a plasma processing torch, the electrode unit includes an insulating sleeve 7, an electrode holder 8, an electrode 10, and an electrode lead 9, the insulating sleeve 7 is disposed inside a gun body housing 5, the insulating sleeve 7 is connected to a gun body tail end 4, the electrode holder 8 is disposed inside the gun body housing 5, the electrode holder 8 is connected to the insulating sleeve 7, the electrode lead 9 is disposed behind the electrode holder 8, the electrode 10 is disposed in front of the electrode holder 8, and the electrode 10, the electrode holder 8, and the electrode lead 9 are connected.

Further, the insulating sleeve 7 is of a cylindrical sleeve structure, the outer diameter of the insulating sleeve 7 is matched with the inner diameter of the cylindrical sleeve at the front end of the gun body tail end 4, and the insulating sleeve 7 and the gun body tail end 4 are screwed up in a mechanical connection mode through threads.

Further, the electrode holder 8 adopts the disc structure of middle trompil, and electrode holder 8 is provided with a plurality of through-holes all around, through-hole interval distance equals, follows 8 circumference slope settings of electrode holder, the external diameter of electrode holder 8 and the internal diameter looks adaptation of insulating cover 7, electrode holder 8 and insulating cover 7 adopt mechanical connection's mode, screw up through the screw thread.

Further, the electrode lead 9 adopts the integrated configuration that the front end is the great disc of the cylinder rear end diameter that the diameter is less, the diameter of the cylinder of electrode lead 9 front end with the diameter looks adaptation of trompil in the middle of the electrode holder 8, the front end of electrode lead 9 passes from inside the electrode holder 8, is provided with the breach on the rear end disc, be provided with the through-hole on the breach, be used for with electrode 10 is connected with high frequency high voltage power supply.

Further, the electrode 10 adopts a combined structure form that the front end is a cone and the rear end is a cylinder, the diameter of the bottom surface of the cylinder is smaller than that of the bottom surface of the cone, and the cone is provided with a threaded hole.

Further, the electrode 10, the electrode holder 8 and the electrode lead 9 are mechanically connected, a front end cylinder of the electrode lead 9 penetrates through the middle of the electrode holder 8, the electrode holder 8 and the electrode 10 are tightly pressed by a rear end disk of the electrode lead 9, a small screw penetrates through a threaded hole formed in the electrode 10, and the front end of the small screw abuts against a front end cylinder structure of the electrode lead 9 to position and lock the electrode 10, the electrode holder 8 and the electrode lead 9.

Example 2

This example is based on the foregoing example 1, and mainly describes the operating principle of a linear plasma processing torch.

With reference to fig. 1 to 7, the specific steps of the operation of the device are as follows:

step 1: an operator replaces the nozzle 6 matched with the processing width according to the width of the product to be processed, and screws the nozzle 6 and the gun body shell 5 through threads to ensure that the interior of the plasma processing spray gun is in a sealed state;

step 2: starting a vacuum pump to pump out air in the plasma processing spray gun, starting a working gas injection device, and continuously injecting working gas through the gas pipe;

and step 3: turning on a power switch, taking an electrode 10, an electrode lead 9 and an electrode seat 8 which are connected with a high-frequency high-voltage power supply through an electrode lead 9 as the anode of a plasma processing spray gun, taking the tail end 4 of a gun body and a gun body shell 5 as the cathode of the plasma processing spray gun, and generating stable glow discharge between the anode and the cathode under a low-voltage state to release plasma;

and 4, step 4: the working gas penetrates through the electrode seat 8 to carry plasmas generated at various positions near the electrode 10 to be sprayed out of the nozzle 6, and the reaction gas penetrates through an air channel inside the nozzle 6 to form rotary air flow, so that linear plasma processing on a target product is completed.

Thus, a linear plasma processing method capable of improving the uniformity of plasma and expanding the processing width is realized.

The previous description of all disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (9)

1. A linear plasma processing spray gun is characterized by comprising a structural unit, a gun body unit and an electrode unit, wherein the structural unit is a gun seat (1) with a shell and used for bearing the gun body unit, placing a high-frequency cable and a working gas transmission pipeline, the structural form of the gun body unit is a sealed cavity with a nozzle (6) and used for bearing the electrode unit and serving as a cathode of the linear plasma processing spray gun, an insulating device is arranged outside the electrode unit, the electrode unit is connected with a high-frequency high-voltage power supply and serves as an anode of the linear plasma processing spray gun, the nozzle (6) adopts a combined structural form, the front end of the nozzle is of a structure with an air passage arranged inside, the air inlet of the air passage is one, the air passage outlets are a plurality of, the rear end of the nozzle is of a cylindrical sleeve, and the direction of the air passage outlet positioned in the center of the nozzle is right ahead, the direction of the air passage outlet far away from the center of the nozzle inclines towards the center of the nozzle, the farther the distance from the center of the nozzle is, the larger the inclination degree is, the inclination degree is adjusted according to the plasma processing width of each air passage outlet, the edges of the plasma processing areas of two adjacent air passage outlets are mutually overlapped, and the uniformity of plasma processing is ensured.

2. The linear plasma processing torch according to claim 1, wherein said structural unit comprises a base (1) and a shell, said shell comprising a base cover (2) and a sheet (3), said base (1) being arranged at the rear end of the linear plasma processing torch, said base cover (2) being arranged above said base (1), said base cover (2) being connected to said base (1), said sheet (3) being arranged behind said base (1), said sheet (3) being connected to said base (1).

3. Linear plasma treatment torch according to claim 2, characterized in that the base (1) is provided with threaded holes on both sides and behind, the upper surface of the base (1) is provided with through threaded holes, the base cover (2) is connected to the base (1), and the sheet (3) is connected to the base (1).

4. The linear plasma processing torch according to claim 1, wherein the torch body unit comprises a sealed chamber and a nozzle (6), the sealed chamber comprises a torch body tail end (4) and a torch body shell (5), the torch body tail end (4) is arranged above the torch base (1), the torch body tail end (4) is connected with the torch base (1), the torch body shell (5) is arranged in front of the torch body tail end (4), the torch body shell (5) is connected with the torch body tail end (4), the nozzle (6) is arranged in front of the torch body shell (5), and the nozzle (6) is connected with the torch body shell (5).

5. The linear plasma processing torch according to claim 4, wherein the rear end (4) of the torch body is provided with a threaded hole which is vertically penetrated through the threaded hole, the rear end (4) of the torch body is connected with the torch base (1), the rear end of the torch body housing (5) has an inner diameter which is adapted to the outer diameter of the front end of the rear end (4) of the torch body, the torch body housing (5) is connected with the rear end (4) of the torch body, and the rear end of the nozzle (6) has an outer diameter which is adapted to the inner diameter of the front end of the torch body housing (5).

6. The linear plasma processing torch according to claim 5, wherein the nozzle (6) is weighted to ensure balance in use of the torch by adding nozzle fitting blocks, which are the same in number as the outlet ports of the gas passages, to the torch.

7. The linear plasma processing torch according to claim 1, wherein the electrode unit comprises an insulating sleeve (7), an electrode holder (8), an electrode (10) and an electrode lead (9), the insulating sleeve (7) is arranged inside the torch body housing (5), the insulating sleeve (7) is connected with the torch body tail end (4), the electrode holder (8) is arranged inside the torch body housing (5), the electrode holder (8) is connected with the insulating sleeve (7), the electrode lead (9) is arranged behind the electrode holder (8), the electrode (10) is arranged in front of the electrode holder (8), and the electrode (10), the electrode holder (8) and the electrode lead (9) are connected.

8. The linear plasma processing torch according to claim 7, wherein the outer diameter of the insulating sleeve (7) is adapted to the inner diameter of the front end of the tail end (4) of the torch body, the electrode holder (8) is of a disk structure with a hole in the middle, a plurality of through holes are formed around the electrode holder (8), the through holes are arranged at equal intervals and are arranged in an inclined manner along the circumferential direction of the electrode holder (8), the outer diameter of the electrode holder (8) is adapted to the inner diameter of the insulating sleeve (7), the shape of the front end of the electrode lead (9) is adapted to the shape of the hole in the middle of the electrode holder (8), the front end of the electrode lead (9) passes through the inside of the electrode holder (8), and a threaded hole is formed in the electrode (10).

9. The linear plasma processing torch according to claim 8, wherein the front end of the electrode lead (9) passes through the middle of the electrode holder (8), the electrode holder (8) and the electrode (10) are pressed by the rear end of the electrode lead (9), a small screw passes through a threaded hole formed in the electrode (10), and the front end of the small screw abuts against the front end of the electrode lead (9) to position and lock the electrode (10), the electrode holder (8) and the electrode lead (9).

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