CN216966599U - Air plasma cutting gun head - Google Patents
Air plasma cutting gun head Download PDFInfo
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- CN216966599U CN216966599U CN202122863842.8U CN202122863842U CN216966599U CN 216966599 U CN216966599 U CN 216966599U CN 202122863842 U CN202122863842 U CN 202122863842U CN 216966599 U CN216966599 U CN 216966599U
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- ceramic insulating
- copper piece
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Abstract
The utility model discloses an air plasma cutting gun head, wherein a sealed cooling airflow channel is formed after an outer copper piece, an insulating piece and a sealing ring of the gun head are configured. The gun head comprises a gun head body, a gun head cover, an outer copper piece, an inner copper piece, an insulating piece and a sealing ring of the gun head cover, wherein a sealed hot air flow channel is formed after the outer copper piece, the inner copper piece, the insulating piece and the sealing ring are configured, and the cooling air flow channel and the hot air flow channel are sealed mutually. There are a plurality of step holes on the outer copper spare of plasma rifle head, step hole air current entry end diameter be less than the exit end diameter, the air current is great at the entry end velocity of flow, can take away more heat, effectively reduces the heat of outer copper spare, the increase of exit end aperture effectively reduces the speed of air current behind the outer copper spare of blowout to avoid influencing the hot gas flow because of the air current velocity of flow is too big when taking away outer copper spare and the more heat of electrode nozzle.
Description
Technical Field
The utility model relates to the technical field of ion cutting, in particular to an improved plasma cutting torch head.
Background
After the compressed air enters the plasma cutting gun head through the gun head copper pipe, the compressed air is divided into cooling air flow and hot air flow under the action of a device in the gun head. The cooling air flow is directly blown low-temperature air flow, and the hot air flow is rotary high-temperature air flow. The cooling gas stream is typically blown from an outer copper part of the lance tip or from a small hole in the outer nozzle to cool the lance tip and the electrode nozzle. The hot air flow is formed by compressed air passing through an inclined hole on the insulating part (or a plurality of thread grooves of the inner copper part), and the rotating air flow compresses current between the electrode and the electrode nozzle to form high-temperature high-speed plasma gas which is ejected out of the small hole of the electrode nozzle and used for melting and blowing away metal to be cut, so that cutting is realized. The hot and cold air flow requirements cannot interfere with each other. The small holes on the outer copper part of the existing air plasma cutting gun head are single in diameter, when the temperature of the gun head and an electrode nozzle is reduced by increasing the air flow, the hot air flow is influenced due to the fact that the air flow velocity is too high, air leakage under different conditions can exist between the inner copper part, the ceramic insulating part and the outer copper part, and the phenomenon that the hot air flow is interfered by the cold air flow is caused. This is particularly true for larger current cuts. Therefore, the stability and the cutting capability of the air plasma cutting gun can be effectively improved by solving the contradiction.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a novel air plasma cutting gun head, and aims to prevent the problems that the rotation of cutting airflow is influenced by the air leakage of an inner copper piece and a ceramic insulating piece, and an outer copper piece and a ceramic insulating piece, and the unstable product performance and the insufficient cutting capability caused by the hot airflow are influenced by the over-high flow rate of cooling airflow.
The technical scheme of the utility model is as follows: an air plasma cutting gun head comprises an inner copper piece, a ceramic insulating piece and an outer copper piece; the inner copper part is of a tubular structure, the outer surface of the inner copper part is at least divided into four sections from top to bottom, and the four sections are respectively as follows: the upper section of the outer surface of the inner copper piece, the middle-lower section of the outer surface of the inner copper piece and the lower section of the outer surface of the inner copper piece are arranged in the groove; the outer diameters of the middle section of the outer surface of the inner copper piece and the lower section of the outer surface of the inner copper piece are smaller than the outer diameter of the middle section of the outer surface of the inner copper piece, and the outer diameter of the middle section of the outer surface of the inner copper piece is smaller than the outer diameter of the upper section of the outer surface of the inner copper piece;
a first boss is formed at the top of the upper section of the outer surface of the inner copper part in a protruding mode, a first sealing ring installation groove is machined at the corner between the bottom surface of the first boss and the outer surface of the inner copper part, and a first sealing ring is installed in the first sealing ring installation groove; a second sealing ring mounting groove is formed in the outer ring of the middle lower section of the outer surface of the inner copper piece, and a second sealing ring is mounted in the second sealing ring mounting groove; the major diameter of the installed first sealing ring is larger than that of the second sealing ring;
the ceramic insulating part is of a tubular structure, the inner surface of the ceramic insulating part is divided into an upper section and a lower section, and the upper section and the lower section are respectively as follows: the diameter of the upper section of the inner surface of the ceramic insulating part is equal to that of the upper section of the outer surface of the inner copper part, and the length of the upper section of the inner surface of the ceramic insulating part is equal to the sum of the lengths of the upper section of the outer surface of the inner copper part and the middle section of the outer surface of the inner copper part; the diameter of the lower section of the inner surface of the ceramic insulating part is equal to that of the middle lower section of the outer surface of the inner copper part; the top of the upper section of the inner surface of the installed ceramic insulating part is tightly matched with the first sealing ring, and the surface of the lower section of the inner surface of the ceramic insulating part is tightly matched with the second sealing ring;
a second boss protrudes from the top of the outer surface of the ceramic insulating part, a third sealing ring mounting groove is processed at an included angle between the bottom surface of the second boss and the outer surface of the ceramic insulating part, and a third sealing ring is mounted in the third sealing ring mounting groove; a first step surface is concavely arranged at the bottom of the outer surface of the ceramic insulating part, a fourth sealing ring mounting groove is machined at the corner of the first step surface, and a fourth sealing ring is mounted in the fourth sealing ring mounting groove;
the outer copper part is also of a hollow tubular structure, the diameters of two ends of the inner surface of the outer copper part are smaller than the diameter of the middle part, the top part of the outer copper part is closely matched and installed with the third sealing ring, and the bottom part of the outer copper part is closely matched and installed with the fourth sealing ring.
Furthermore, a circle of small holes which are axially opened are formed in the bottom of the outer copper part, and the small holes are stepped holes which are narrow at the upper part and wide at the lower part.
Furthermore, two second sealing ring mounting grooves are arranged on the outer ring of the middle lower section of the outer surface of the inner copper part side by side, and the two second sealing rings are mounted in the second sealing ring mounting grooves in a one-to-one correspondence mode. The sealing effect is enhanced.
Further, the inner copper piece, the ceramic insulating piece and the outer copper piece are fixed through bakelite.
The utility model has the beneficial effects that: the ratio of hot air flow and cooling air flow of the plasma gun head is 1: 5 to 1: 4 in the middle. The high-current cutting machine has a good cooling effect during high-current cutting, and the influence of cooling airflow on hot airflow can be reduced. The plasma gun head is characterized in that a plurality of step holes are formed in the outer copper part of the plasma gun head, the diameter of the airflow inlet end of each step hole is smaller than that of the outlet end, the airflow has a large flow velocity at the inlet end, more heat can be taken away, the heat of the outer copper part is effectively reduced, the diameter of the outlet end aperture is increased, the speed of the cold airflow after the cold airflow is sprayed out of the outer copper part is effectively reduced, and therefore the influence on the hot airflow due to the fact that the flow velocity of the cold airflow is too large is avoided when the more heat of the outer copper part and the electrode nozzle is taken away. And a sealed cooling airflow channel is formed after the outer copper part, the insulating part and the sealing ring of the gun head are configured. The outer copper part, the inner copper part, the insulating part and the sealing ring of the gun head are configured to form a sealed hot air flow channel, and the cooling air flow channel and the hot air flow channel are sealed with each other. The cold air flow does not influence the hot air flow in the gun head and outside the gun head, the hot air flow is effectively rotated, and the copper outside the gun head and the electrode nozzle are effectively cooled. The cutting performance of the gun head and the service life of the electrode nozzle are effectively improved. Under the same condition, the cutting performance of the gun head can be improved to more than 20%.
The major diameter of the upper end of the inner copper part after one sealing ring is installed is larger than the major diameter of the lower end of the inner copper part after two sealing rings are installed. Therefore, the abrasion of the sealing ring can be greatly reduced in the installation process, and a good sealing effect can be achieved.
Drawings
Fig. 1 is a half sectional view of a commonly used plasma cutting torch head. Wherein: 1-usually outer copper, 2-usually ceramic insulation, 3-usually inner copper, 4-bakelite, 5-glue.
Fig. 2 is a half sectional view of a plasma cutting torch head according to the present invention.
Fig. 3 is a partial cross-sectional view of a plasma cutting torch head according to the utility model.
Figure 4 is an axial cross-sectional view of the outer copper member.
Figure 5 is a radial cross-sectional view of the outer copper member.
Wherein: 6-bakelite, 7-inner copper piece, 8-first sealing ring, 9-third sealing ring, 10-ceramic insulating piece, 11-outer copper piece, 12-second sealing ring, 13-fourth sealing ring, 14-small hole, a-matching surface 1, b-matching surface 2, c-matching round surface 3 and d-matching round surface 4.
Detailed Description
The air plasma cutting torch head of the present invention will be described in further detail with reference to the accompanying drawings.
Comparative example:
as shown in fig. 1, a commonly used plasma cutting torch head has a single diameter orifice in the outer copper member 1. When the air flow is large, the cooling air flow has a high flow speed after flowing out of the small holes, and the rotary compression of the hot air flow is influenced, so that the cutting performance is reduced. Clearance fit is adopted between the inside of the outer copper part 1 which is usually used and the outside of the inner copper part 2 which is usually used, a sealing ring is arranged at the near end of the inner copper part 2 which is usually used and the near end of the inner copper part 3 which is usually used, the far end of the inner copper part 2 which is usually used and the far end of the inner copper part 3 which is usually used are in clearance fit, and a plurality of spiral grooves are formed at the far end of the inner copper part which is usually used and can supply hot air flow to rotate. The clearance between the outer copper part 1 and the insulating part 2, and the fit clearance between the inner copper part 3 and the distal end of the insulating part 2 affect the rotation of the hot air flow, which results in unstable performance during cutting.
Example 1:
as shown in fig. 2-5, an air plasma cutting torch head comprises an inner copper member 7, a ceramic insulator 10 and an outer copper member 11. The inner copper part 7 is of a tubular structure, and the outer surface of the inner copper part 7 is at least divided into four sections from top to bottom, wherein the four sections are respectively as follows: the upper section of the outer surface of the inner copper piece, the middle-lower section of the outer surface of the inner copper piece and the lower section of the outer surface of the inner copper piece. The outer diameters of the middle section of the outer surface of the inner copper piece and the lower section of the outer surface of the inner copper piece are smaller than the outer diameter of the middle section of the outer surface of the inner copper piece, and the outer diameter of the middle section of the outer surface of the inner copper piece is smaller than the outer diameter of the upper section of the outer surface of the inner copper piece.
The top protrusion of interior copper spare surface upper segment is formed with first boss, the contained angle department processing between first boss bottom surface and the interior copper spare surface has first sealing washer mounting groove, and first sealing washer 8 is installed in first sealing washer mounting groove. Two second sealing ring mounting grooves are arranged in parallel on the outer ring of the middle lower section of the outer surface of the inner copper part, and the two second sealing rings 12 are mounted in the second sealing ring mounting grooves in a one-to-one correspondence manner. The major diameter of the installed first seal ring 8 is larger than that of the second seal ring 12.
The ceramic insulating part 10 is of a tubular structure, the inner surface of the ceramic insulating part 10 is divided into an upper section and a lower section, and the upper section and the lower section are respectively as follows: the diameter of the upper section of the inner surface of the ceramic insulating part is equal to that of the upper section of the outer surface of the inner copper part, and the length of the upper section of the inner surface of the ceramic insulating part is equal to the sum of the lengths of the upper section of the outer surface of the inner copper part and the middle section of the outer surface of the inner copper part. The diameter of the lower section of the inner surface of the ceramic insulating piece is equal to the diameter of the middle lower section of the outer surface of the inner copper piece. The top of the upper section of the inner surface of the installed ceramic insulating part is tightly matched with the first sealing ring 8, and the surface of the lower section of the inner surface of the ceramic insulating part is tightly matched with the two second sealing rings 12. Ensuring that no air can leak between the inner copper member 7 and the ceramic insulator 10.
A second boss protrudes from the top of the outer surface of the ceramic insulating part 10, a third sealing ring mounting groove is processed at an included angle between the bottom surface of the second boss and the outer surface of the ceramic insulating part, and a third sealing ring 9 is mounted in the third sealing ring mounting groove. A first step surface is concavely arranged at the bottom of the outer surface of the ceramic insulating part 10, a fourth sealing ring mounting groove is machined at the corner of the first step surface, and a fourth sealing ring 13 is mounted in the fourth sealing ring mounting groove.
The outer copper part 11 is also of a hollow tubular structure, the diameters of two ends of the inner surface of the outer copper part are smaller than the diameter of the middle part, the top part of the outer copper part is tightly matched and installed with the third sealing ring 9, and the bottom part of the outer copper part is tightly matched and installed with the fourth sealing ring 13. After the outer copper piece 11, the ceramic insulating piece 10 and the inner copper piece 7 are installed, the outer copper piece, the ceramic insulating piece and the inner copper piece are fixed through tools and then placed into a mold for injection molding of bakelite 6.
Specifically, as shown in fig. 3, two matching surfaces a and b are arranged between an outer copper part 11 and a ceramic insulating part 10 of the gas leakage prevention plasma cutting torch head, and the two matching surfaces respectively compress two sealing rings 9 and 13. There are also two mating circular surfaces c and d between the ceramic insulator 10 and the inner copper member 7. The diameter of the matching round surface C is larger than that of the matching round surface d, and the major diameter of one sealing ring 8 at the upper end of the inner copper part 7 after installation is larger than that of two sealing rings 12 at the lower end after installation. Therefore, the abrasion of the sealing ring 8 can be greatly reduced in the installation process, and a good sealing effect can be achieved.
As shown in fig. 4 and 5, a circle of small holes 14 opened along the axial direction is arranged at the bottom of the outer copper part 11, and the small holes 14 are stepped holes with narrow top and wide bottom. The diameter f of the small hole at the near end of the gun head is smaller than the diameter g of the small hole at the far end, the flow velocity of airflow passing through the small hole is high, and the flow velocity is reduced when the airflow passes through the small hole with the large diameter. Therefore, the heat of the gun head and the nozzle can be effectively taken away, and the influence on hot air flow caused by overhigh flow speed of the cooling air flow is reduced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. An air plasma cutting gun head comprises an inner copper piece (7), a ceramic insulating piece (10) and an outer copper piece (11); the method is characterized in that: the inner copper piece (7) is of a tubular structure, the outer surface of the inner copper piece (7) is divided into at least four sections from top to bottom, and the four sections are respectively as follows: the upper section of the outer surface of the inner copper piece, the middle-lower section of the outer surface of the inner copper piece and the lower section of the outer surface of the inner copper piece are arranged in the groove; the outer diameters of the middle section of the outer surface of the inner copper piece and the lower section of the outer surface of the inner copper piece are smaller than the outer diameter of the middle section of the outer surface of the inner copper piece, and the outer diameter of the middle section of the outer surface of the inner copper piece is smaller than the outer diameter of the upper section of the outer surface of the inner copper piece;
a first boss is formed at the top of the upper section of the outer surface of the inner copper part in a protruding mode, a first sealing ring installation groove is formed in the included angle between the bottom surface of the first boss and the outer surface of the inner copper part in a processing mode, and a first sealing ring (8) is installed in the first sealing ring installation groove; a second sealing ring mounting groove is formed in the outer ring of the middle lower section of the outer surface of the inner copper piece, and a second sealing ring (12) is mounted in the second sealing ring mounting groove; the major diameter of the installed first sealing ring (8) is larger than that of the second sealing ring (12);
the ceramic insulating part (10) is of a tubular structure, the inner surface of the ceramic insulating part (10) is divided into an upper section and a lower section, and the upper section and the lower section are respectively as follows: the diameter of the upper section of the inner surface of the ceramic insulating part is equal to that of the upper section of the outer surface of the inner copper part, and the length of the upper section of the inner surface of the ceramic insulating part is equal to the sum of the lengths of the upper section of the outer surface of the inner copper part and the middle section of the outer surface of the inner copper part; the diameter of the lower section of the inner surface of the ceramic insulating piece is equal to that of the middle lower section of the outer surface of the inner copper piece; the top of the upper section of the inner surface of the installed ceramic insulating part is tightly matched with the first sealing ring (8), and the surface of the lower section of the inner surface of the ceramic insulating part is tightly matched with the second sealing ring (12);
a second boss protrudes from the top of the outer surface of the ceramic insulating part (10), a third sealing ring mounting groove is processed at an included angle between the bottom surface of the second boss and the outer surface of the ceramic insulating part, and a third sealing ring (9) is mounted in the third sealing ring mounting groove; a first step surface is concavely arranged at the bottom of the outer surface of the ceramic insulating part (10), a fourth sealing ring mounting groove is processed at the corner of the first step surface, and a fourth sealing ring (13) is mounted in the fourth sealing ring mounting groove;
the outer copper part (11) is also of a hollow tubular structure, the diameters of two ends of the inner surface of the outer copper part are smaller than the diameter of the middle part, the top of the outer copper part is tightly matched and installed with the third sealing ring (9), and the bottom of the outer copper part is tightly matched and installed with the fourth sealing ring (13).
2. An air plasma cutting torch head according to claim 1, wherein: the bottom of the outer copper part (11) is provided with a circle of small holes (14) which are axially opened, and the small holes (14) are stepped holes which are narrow at the top and wide at the bottom.
3. An air plasma cutting torch head according to claim 1, wherein: two second sealing ring mounting grooves are arranged on the outer ring of the middle lower section of the outer surface of the inner copper part side by side, and the two second sealing rings (12) are mounted in the second sealing ring mounting grooves in a one-to-one correspondence mode.
4. An air plasma cutting torch head according to claim 1, wherein: the inner copper piece (7), the ceramic insulating piece (10) and the outer copper piece (11) are fixed through bakelite (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122863842.8U CN216966599U (en) | 2021-11-22 | 2021-11-22 | Air plasma cutting gun head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122863842.8U CN216966599U (en) | 2021-11-22 | 2021-11-22 | Air plasma cutting gun head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216966599U true CN216966599U (en) | 2022-07-15 |
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ID=82344904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122863842.8U Active CN216966599U (en) | 2021-11-22 | 2021-11-22 | Air plasma cutting gun head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216966599U (en) |
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2021
- 2021-11-22 CN CN202122863842.8U patent/CN216966599U/en active Active
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