CN217418794U

CN217418794U - Rotary plasma spray gun

Info

Publication number: CN217418794U
Application number: CN202221270740.3U
Authority: CN
Inventors: 王凯; 申忠; 倪利民; 侯楠楠
Original assignee: Zhengzhou Lijia Thermal Spraying Machinery Co ltd
Current assignee: Zhengzhou Lijia Thermal Spraying Machinery Co ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2022-09-13
Anticipated expiration: 2032-05-25

Abstract

The utility model discloses a rotation type plasma spray gun, including preceding rifle shell, middle insulator, the back rifle shell, middle insulation connector and insulating connector, the both sides of middle insulator are provided with preceding rifle shell and back rifle shell respectively, and be provided with the air current distribution ring in middle insulator, be provided with the nozzle in the front rifle shell, be provided with water separating sleeve between nozzle and preceding rifle shell, be provided with the negative pole head in the below of nozzle, be provided with the powder needle of sending in the nozzle, be provided with the positive pole inlet tube in the front on the rifle shell, be provided with the negative pole wet return on the back rifle shell, be provided with mixed intake pipe on middle insulator, at the positive pole inlet tube, the outside of negative pole wet return and mixed intake pipe is provided with the protective housing, the conducting ring has set gradually on the right side of protective housing, middle insulation connector and insulating connector. The utility model provides a rotatory difficult problem during the spraying of work piece hole, simultaneously, improved the cooling efficiency to the position that generates heat, very big assurance the stability of spray gun, easily promote.

Description

Rotary plasma spray gun

The technical field is as follows:

the utility model relates to a spray gun, in particular to rotation type plasma spray gun.

Background art:

the standard plasma spraying is generally used for spraying the outer surface of a workpiece, for a narrow space with the diameter within 500mm, the inner surface of the narrow space is difficult to spray by using a common plasma spray gun, because the conventional spray gun is axially sprayed and the direction and the angle of plasma cannot be changed, only a special elbow inner hole spray gun can be used for spraying the inner wall or an inner hole, a barrel of the spray gun has an included angle of 60 degrees or 45 degrees with a combustion chamber, a shielding effect is necessarily generated, powder is not vertically sprayed to the surface of the workpiece, the quality of a formed coating is not ideal, a plurality of workpieces needing to be sprayed with the inner hole surface are difficult to rotate or cannot rotate, even one workpiece has a plurality of inner holes needing to be sprayed, a plurality of inner holes can not be sprayed, a plurality of workpieces needing to be sprayed with the inner hole surface are difficult to rotate or cannot rotate, and even one workpiece has a plurality of inner holes needing to be sprayed, this makes many bore sprays more difficult and difficult to achieve.

The utility model has the following contents:

the utility model discloses the technical problem that will solve is: overcome prior art's not enough, provide a rotation type plasma spray gun, drive the spray gun through outside motor and rotate, simultaneously, improved the cooling efficiency to the position that generates heat, very big assurance the stability of spray gun.

The utility model discloses a technical scheme who solves technical problem and take is:

the utility model provides a rotation type plasma spray gun, includes preceding rifle shell, middle insulator, back rifle shell, intermediate insulation connector and insulating connector, the both sides of middle insulator are provided with preceding rifle shell and back rifle shell respectively to be provided with the air current distribution ring in middle insulator, be provided with the nozzle in the preceding rifle shell to be provided with water-proof cover between nozzle and the preceding rifle shell, the below of nozzle is provided with the negative pole head, and the negative pole head is located the back rifle shell to be in the same place fixed with the back rifle shell through the electrode holder, the nozzle interpolation is equipped with and send the powder needle, and send the right-hand member of powder needle and send the powder union coupling, send the other end of powder pipe and the passageway Z1 in the intermediate insulation connector to be connected with the positive pole inlet tube on the preceding rifle shell, be connected with mixed intake pipe on the middle insulator, be connected with the negative pole wet return on the back rifle shell, wherein: the tip of positive pole inlet tube is connected through passageway Z2 in positive pole conducting ring and the intermediate insulation connector, and passageway Z2 links together with passageway J2 in the insulating connector, and the tip of negative pole wet return is passed through the negative pole conducting ring and is connected with passageway Z3 in the intermediate insulation connector, the tip of mixing the intake pipe is connected with passageway Z6 in the intermediate insulation connector, the right side of intermediate insulation connector is provided with insulating connector, the right side of insulating connector is provided with the gas-liquid sliding ring, the inner core of gas-liquid sliding ring passes through the motor and rotates.

The powder injection fixing sleeve is arranged outside the nozzle, and the powder feeding needle is inserted in the nozzle and is connected with the powder injection fixing sleeve through threads.

The outside of positive pole inlet tube, mixed intake pipe and negative pole wet return is provided with the protective housing, the protective housing passes through the bolt and is connected with preceding rifle shell.

The external portion of insulating connector is provided with anodal brush yoke and negative pole brush yoke, and anodal brush yoke and negative pole brush yoke are connected with external power source's positive pole and negative pole respectively.

Be provided with air flue Q1 and air flue Q2 on the powder needle fixed cover, correspond respectively on intermediate insulation connector, insulating connector and the gas-liquid sliding ring and dig and be equipped with the passageway, wherein: the middle insulation connector is provided with a channel Z1, a channel Z2, a channel Z3, a channel Z4, a channel Z5, a channel Z6 and a channel Z7 in a dug mode, a channel J1, a channel J2, a channel J3, a channel J4, a channel J5, a channel J6 and a channel J7 in positions corresponding to the insulation connector, and a channel H1, a channel H2, a channel H3, a channel H4, a channel H5, a channel H6 and a channel H7 in positions corresponding to the gas-liquid sliding ring in the channel of the insulation connector in a dug mode.

And an electrode seat insulating jackscrew is arranged below the electrode seat.

The utility model discloses an actively beneficial effect is:

1. the utility model discloses a link together the inner core of gas-liquid sliding ring and motor, make the spray gun have rotation function, solved the in-process of spraying, work piece self is rotatory difficult or unable rotatory problem, has improved the spraying quality.

2. The utility model discloses an interior powder feeding structure is equipped with through the nozzle interpolation and send the powder needle for the heating effect of powder is better, has improved the heat utilization efficiency, has improved spraying efficiency, the cost is reduced.

3. The utility model discloses a set up the positive pole inlet tube in the front on the rifle shell, set up the negative pole wet return on the rifle shell of back, can carry out water circulative cooling to nozzle and electrode tip position, very big assurance the stability of spray gun.

Description of the drawings:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 3 is a cross-sectional view of C-C of FIG. 1;

FIG. 4 is a cross-sectional view of E-E of FIG. 1;

FIG. 5 is a cross-sectional view taken along line D-D of FIG. 1;

wherein: 1-insulating shell, 2-front gun shell, 3-electrode holder, 4-electrode holder insulating jackscrew, 5-cathode head, 6-intermediate insulator, 7-airflow distribution ring, 8-rear gun shell, 9-nozzle press cap, 10-nozzle, 11-water separation sleeve, 12-powder injection fixing sleeve, 13-powder injection, 14-powder injection pipe, 15-protective shell, 16-anode water inlet pipe, 17-mixed air inlet pipe, 18-cathode water return pipe, 19-anode brush holder, 20-cathode brush holder, 21-cathode conducting ring, 22-anode, 23-intermediate insulating connector, 24-insulating connector and 25-gas-liquid sliding ring.

The specific implementation mode is as follows:

the invention will be further explained and explained with reference to the drawings, in which:

example 1, referring to fig. 1 to 5, a rotary plasma torch includes a front gun housing 2, an intermediate insulator 6, a rear gun housing 8, an intermediate insulating connector 23, and an insulating connector 24, wherein a front gun housing 2 and a rear gun housing 8 are respectively disposed at both sides of the intermediate insulator 6, an air distribution ring 7 is disposed in the intermediate insulator 6, a nozzle 10 is disposed in the front gun housing 2, a water separation sleeve 11 is disposed between the nozzle 10 and the front gun housing 2, a cathode head 5 is disposed below the nozzle 10, the cathode head 5 is disposed in the rear gun housing 8 and fixed to the rear gun housing 8 through an electrode holder 3, a powder feeding needle 13 is inserted into the nozzle 10, a right end of the powder feeding needle 13 is connected to a powder feeding tube 14, the other end of the powder feeding tube 14 is connected to a passage Z1 in the intermediate insulating connector 23, an anode water inlet tube 16 is connected to the front gun housing 2, a mixed air inlet tube 17 is connected to the intermediate insulator 6, the rear gun shell 8 is connected with a cathode water return pipe 18, wherein: the end of the anode water inlet pipe 16 is connected with a channel Z2 in the middle insulation connector 23 through the anode conducting ring 22, and the channel Z2 is connected with a channel J2 in the insulation connector 24, the end of the cathode water return pipe 18 is connected with a channel Z3 in the middle insulation connector 23 through the cathode conducting ring 21, the end of the mixed air inlet pipe 17 is connected with a channel Z6 in the middle insulation connector 23, the right side of the middle insulation connector 23 is provided with an insulation connector 24, the right side of the insulation connector 24 is provided with a gas-liquid slip ring 25, and the inner core of the gas-liquid slip ring 25 is connected with the rotating shaft of the motor.

The exterior of the nozzle 10 is provided with a powder injection fixing sleeve 12, and a powder injection 13 is inserted into a mounting hole in the nozzle 10 and is connected with the powder injection fixing sleeve 12 through threads.

And a protective shell 15 is arranged outside the anode water inlet pipe 16, the mixed air inlet pipe 17 and the cathode water return pipe 18, and the protective shell 15 is connected with the front gun shell 2 through bolts.

The insulating connector 24 is provided on the outside with a positive electrode brush holder 19 and a negative electrode brush holder 20, and the positive electrode brush holder 19 and the negative electrode brush holder 20 are connected to the positive electrode and the negative electrode of an external power supply, respectively.

Be provided with air flue Q1 and air flue Q2 on the fixed cover 12 of powder needle, correspond respectively on middle insulating connector 23, insulating connector 24 and the gas-liquid sliding ring 25 and dig and be equipped with the passageway, wherein: the intermediate insulating connector 23 is provided with a channel Z1, a channel Z2, a channel Z3, a channel Z4, a channel Z5, a channel Z6 and a channel Z7 in a dug manner, and is provided with a channel J1, a channel J2, a channel J3, a channel J4, a channel J5, a channel J6 and a channel J7 in a dug manner at a position corresponding to the insulating connector 24, and is provided with a channel H1, a channel H2, a channel H3, a channel H4, a channel H5, a channel H6 and a channel H7 in a dug manner at a position corresponding to the gas-liquid slip ring 25 in the insulating connector 24.

An electrode holder insulating jackscrew 4 is arranged below the electrode holder 3.

The exterior of the front gun shell 2, the intermediate insulator 6 and the rear gun shell 8 is provided with an insulating shell 1.

The nozzle 10 is secured to the forward gun housing 2 by a nozzle pressure cap 9.

The air passage Q1 and the air passage Q2 are respectively connected with a passage Z4 and a passage Z5 in the intermediate insulating connector 23, a passage Z4 and a passage Z5 are respectively connected with a passage J4 and a passage J5 in the insulating connector 24, and a passage J4 and a passage J5 are respectively connected with a passage H4 and a passage H5 in the gas-liquid slip ring 25.

In the above description, the external cooling circulating water enters the channel H2 from the gas-liquid slip ring casing, enters the anode water inlet pipe through the insulating connector, then enters the interlayer between the nozzle and the water-stop jacket through the interlayer between the front casing gun and the water-stop jacket, then flows out of the air at the other end of the front casing gun to the hole at the left side of the intermediate insulator, and then enters the cavity of the rear casing gun, a part of the external cooling circulating water flows out of the gap between the electrode holder and the rear casing gun, a part of the external cooling circulating water enters the inside of the electrode holder through the hole on the electrode holder, further cools the electrode tip, finally flows through the cathode water return pipe through the channel J3 of the insulating connector, and then returns through the channel H3 of the gas-liquid slip ring, thereby completing the water cooling cycle.

In the above description, the positive brush holder is connected to the positive electrode of the external power supply, the positive electrode conducting ring conducts electricity to the anode nozzle through the anode water inlet pipe and the front gun shell, the negative brush holder is connected to the negative electrode of the external power supply, the negative electrode conducting ring conducts electricity to the cathode head through the cathode water return pipe and the rear gun shell, a gap is formed between the cathode head and the anode nozzle, an electric arc is generated between the cathode head and the anode nozzle after the electricity is conducted, gas such as argon or nitrogen enters the mixed gas inlet pipe through the gas-liquid slip ring shell through the slip ring internal channel H6, the insulating connector internal channel J6 and the channel Z6 in the intermediate insulating connector, then enters the cavity of the intermediate insulator and the gas flow distribution ring, and uniformly enters the gap between the anode nozzle and the cathode head through the distribution function of the gas flow ring distribution ring, and generates a plasma arc through ionization, and is sprayed out of the nozzle.

In the above description, the powder flows from the channel H1 of the gas-liquid slip ring, through the channel J1 in the insulating connector and the channel Z1 in the intermediate insulating connector, then passes through the powder feeding tube, finally enters the plasma arc in the nozzle through the powder feeding needle, and is sprayed on the surface of the workpiece through the heating of the plasma arc.

In the above description, two paths of compressed air respectively enter the channel H4 and the channel H5 in the gas-liquid slip ring from the gas-liquid slip ring shell, pass through the corresponding channels on the insulating connector and the intermediate insulating connector, respectively enter the gap between the powder injection fixing sleeve and the nozzle from the powder injection fixing sleeve air passage Q1 and the air passage Q2, and then blow to the surface of the workpiece through the gap, so as to play roles in cooling the nozzle and purifying the workpiece.

In the above description, the external motor drives the gas-liquid slip ring inner core to rotate through synchronous belt transmission, so as to realize the rotation of the spray gun, and the rotating spray gun is continuously powered through the contact of the positive and negative brush holders with the positive and negative conducting rings, so as to finally realize the rotary spraying.

The utility model discloses an outside motor drives the spray gun and rotates, and rotatory difficult problem when having solved the spraying of work piece hole has simultaneously improved the cooling efficiency to the position that generates heat, very big assurance the stability of spray gun, convenient to use, easy operation easily promotes.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A rotary plasma torch comprising a front torch shell (2), an intermediate insulator (6), a rear torch shell (8), an intermediate insulating connector (23) and an insulating connector (24), characterized in that: the powder injection gun is characterized in that a front gun shell (2) and a rear gun shell (8) are respectively arranged on two sides of the middle insulator (6), an airflow distribution ring (7) is arranged in the middle insulator (6), a nozzle (10) is arranged in the front gun shell (2), a water separation sleeve (11) is arranged between the nozzle (10) and the front gun shell (2), a cathode head (5) is arranged below the nozzle (10), the cathode head (5) is positioned in the rear gun shell (8) and fixed with the rear gun shell (8) through an electrode base (3), a powder injection needle (13) is inserted into the nozzle (10), the right end of the powder injection needle (13) is connected with a powder injection tube (14), the other end of the powder injection tube (14) is connected with a channel Z1 in the middle insulating connector (23), an anode water inlet tube (16) is connected onto the front gun shell (2), a mixed air inlet tube (17) is connected onto the middle insulator (6), be connected with negative pole wet return (18) on back rifle shell (8), wherein: the end of the anode water inlet pipe (16) is connected with a channel Z2 in the middle insulation connector (23) through the anode conducting ring (22), the channel Z2 is connected with a channel J2 in the insulation connector (24), the end of the cathode water return pipe (18) is connected with a channel Z3 in the middle insulation connector (23) through the cathode conducting ring (21), the end of the mixed air inlet pipe (17) is connected with a channel Z6 in the middle insulation connector (23), the right side of the middle insulation connector (23) is provided with the insulation connector (24), the right side of the insulation connector (24) is provided with the gas-liquid sliding ring (25), and the inner core of the gas-liquid sliding ring (25) rotates through an external motor.

2. The rotating plasma torch of claim 1, wherein: the powder injection device is characterized in that a powder injection fixing sleeve (12) is arranged outside the nozzle (10), and the powder injection (13) is inserted into the nozzle (10) and is connected with the powder injection fixing sleeve (12) through threads.

3. The rotating plasma torch of claim 1, wherein: the outside of positive pole inlet tube (16), mixed intake pipe (17) and negative pole wet return (18) is provided with protective housing (15), protective housing (15) are connected with preceding rifle shell (2) through the bolt.

4. The rotating plasma torch of claim 1, wherein: and the outside of the insulating connector (24) is provided with a positive brush holder (19) and a negative brush holder (20), and the positive brush holder (19) and the negative brush holder (20) are respectively connected with the positive pole and the negative pole of an external power supply.

5. The rotating plasma torch of claim 2, wherein: be provided with air flue Q1 and air flue Q2 on the fixed cover of powder needle (12), correspond respectively on intermediate insulation connector (23), insulating connector (24) and gas-liquid sliding ring (25) and dig and be equipped with the passageway, wherein: the middle insulation connector (23) is provided with a channel Z1, a channel Z2, a channel Z3, a channel Z4, a channel Z5, a channel Z6 and a channel Z7 in a dug mode, a channel J1, a channel J2, a channel J3, a channel J4, a channel J5, a channel J6 and a channel J7 in a dug mode at the position corresponding to the insulation connector (24), and a channel H1, a channel H2, a channel H3, a channel H4, a channel H5, a channel H6 and a channel H7 in a dug mode at the position corresponding to the gas-liquid slip ring (25) of the channel on the insulation connector (24).

6. The rotating plasma torch of claim 1, wherein: and an electrode seat insulating jackscrew (4) is arranged below the electrode seat (3).

7. The rotating plasma torch of claim 1, wherein: and an insulating shell (1) is arranged outside the front gun shell (2), the middle insulator (6) and the rear gun shell (8).

8. The rotating plasma torch of claim 1, wherein: the nozzle (10) is fixed with the front gun shell (2) through a nozzle pressing cap (9).

9. The rotating plasma torch of claim 5, wherein: the air passage Q1 and the air passage Q2 on the powder injection fixing sleeve (12) are respectively connected with a passage Z4 and a passage Z5 in the middle insulation connecting body (23), the passage Z4 and the passage Z5 are respectively connected with a passage J4 and a passage J5 in the insulation connector (24), and the passage J4 and the passage J5 are respectively connected with a passage H4 and a passage H5 in the gas-liquid slip ring (25).