Nozzle for plasma cutting machine

Abstract

The utility model relates to a nozzle for a plasma cutting machine, which belongs to the technical field of plasma cutting and comprises a nozzle main body, a middle channel is arranged in one end of the nozzle main body, a plurality of through holes are arranged on one side of the nozzle main body, the through holes are circumferentially distributed by taking the nozzle main body as the center, and all the through holes extend to the middle channel. In the through holes, at least one through hole is used for conveying cooling liquid into the middle channel, the through hole used for conveying the cooling liquid into the middle channel is an input channel, at least one through hole is used for outputting the cooling liquid in the middle channel, and the through hole used for outputting the cooling liquid in the middle channel is an output channel. The nozzle body is provided with the middle channel and the through holes communicated with the middle channel, so that cooling liquid flows in the middle channel and the through holes communicated with the middle channel, the cooling uniformity of the nozzle body is improved, and the service life of the nozzle body is prolonged.

Description

Technical Field

[0001] The utility model relates to a nozzle for a plasma cutting machine, belonging to the technical field of plasma cutting. Background Art

[0002] In modern industrial applications, plasma cutting is increasingly used for machining. Plasma cutting machines can be used to cut a variety of metal materials, including stainless steel, aluminum, copper, cast iron, and carbon steel. Plasma cutting machines offer not only fast cutting speeds, narrow kerfs, smooth cuts, a minimal heat-affected zone, minimal workpiece deformation, and simple operation, but also significant energy savings. The plasma cutting nozzle is one of the main consumable components of a plasma cutting machine, and its lifespan is directly related to cutting quality and production efficiency.

[0003] A Chinese utility model patent with announcement number CN213888621U discloses a plasma cutting nozzle, comprising a nozzle body, wherein the nozzle body is made of high-quality copper alloy through mechanical processing, one end of the nozzle body is provided with a swirl ring positioning and mounting hole, and the other end of the nozzle body is provided with a plasma injection hole. In this utility model, the sealing ring groove can be sealed with the gun body through the sealing ring, and the conical surface of the cooling channel can form a coolant channel between the gun body and the gun body. The coolant channel can inject coolant to cool the nozzle. The structure is simple, which can effectively improve the cooling effect of the plasma nozzle and greatly increase the service life of the nozzle. The utility model has the characteristics of low cost and long service life. However, in the prior art, when the nozzle is cooled by the flow of coolant in the coolant channel, the contact position between the nozzle and the coolant is relatively concentrated, resulting in uneven cooling of the nozzle, which affects the service life of the nozzle.

[0004] Therefore, there is a need for a nozzle for a plasma cutting machine that can improve cooling uniformity and extend service life. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in order to overcome the deficiencies of the prior art, a nozzle for a plasma cutting machine is provided which improves cooling uniformity and prolongs service life.

[0006] The technical solution adopted by the present invention to solve the above-mentioned problem is: a nozzle for a plasma cutting machine, comprising a nozzle body, an intermediate channel is provided in one end of the nozzle body, and a plurality of through holes are provided on one side of the nozzle body, each through hole is circumferentially distributed with the nozzle body as the center, and each through hole extends to the intermediate channel. Among the through holes, at least one through hole is used to transport coolant into the intermediate channel, and the through hole used to transport coolant into the intermediate channel is the input channel, and at least one through hole is used to output the coolant in the intermediate channel, and the through hole used to output the coolant in the intermediate channel is the output channel.

[0007] Preferably, the number of the through holes is an even number.

[0008] Preferably, the number of the through holes is an even number of eight, the number of the input channels and the number of the output channels are both four, and the four input channels and the four output channels are staggered.

[0009] Preferably, the intermediate channel includes a groove and a sealing cover, the groove is arranged at one end of the nozzle body, the sealing cover matches the groove, the sealing cover is sealingly arranged at the notch of the groove, and the sealing cover is fixedly connected to the nozzle body.

[0010] Preferably, the outer side of the sealing cover is in the same plane as the end of the nozzle body.

[0011] Preferably, the sealing cover is detachably fixedly connected to the nozzle body via a locking member.

[0012] Preferably, the groove is annular, the inner and outer walls of the groove notch end are provided with chamfers, and the inner and outer walls of the sealing cover are provided with flanges, the flanges correspond to and match the chamfers one by one, and the flanges fit the chamfers.

[0013] Preferably, the nozzle body is provided with an injection hole, a compression hole, a guide hole and a mounting hole, and the injection hole, compression hole, guide hole and mounting hole are coaxially connected in sequence. The injection hole is located at one end of the nozzle body, and the mounting hole is located at the other end of the nozzle body. The compression hole and the guide hole are both frustum-shaped, the aperture of the injection hole is equal to the minor diameter of the compression hole, the major diameter of the compression hole is equal to the minor diameter of the guide hole, and the aperture of the mounting hole is larger than the major diameter of the guide hole.

[0014] Preferably, the nozzle body includes a first cylindrical section, a conical section and a second cylindrical section, the first cylindrical section, the conical section and the second cylindrical section are coaxially arranged, the first cylindrical section is located at the small diameter end of the conical section, the first cylindrical section is located at the large diameter end of the conical section, the diameter of the second cylindrical section is equal to the large diameter of the conical section, the intermediate channel is located at the end of the second cylindrical section away from the conical section, and one end of the through hole is located on the conical surface of the conical section.

[0015] Preferably, a first sealing ring groove is provided on the outer circumferential wall of the first cylindrical section, and the first sealing ring groove is used to install a first sealing ring; a second sealing ring groove is provided on the outer circumferential wall of the second cylindrical section, and the second sealing ring groove is used to install a second sealing ring.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] The utility model discloses a nozzle for a plasma cutting machine. An intermediate channel and a plurality of through holes connected thereto are provided on a nozzle body, so that a coolant flows in the intermediate channel and the plurality of through holes connected thereto, thereby improving the cooling uniformity of the nozzle body and extending the service life of the nozzle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional diagram of a nozzle for a plasma cutting machine according to the present invention;

[0019] Figure 2 for Figure 1 The main view;

[0020] Figure 3 for Figure 1 Left view of;

[0021] Figure 4 for Figure 1 Right view;

[0022] Figure 5 for Figure 1 sectional view of

[0023] Figure 6 for Figure 5 A magnified view of part A;

[0024] Figure 7 is a three-dimensional diagram of the nozzle body;

[0025] Figure 8 for Figure 7 sectional view of

[0026] Figure 9 for Figure 8 Enlarged view of part B.

[0027] in:

[0028] Nozzle body 1, middle channel 2, through hole 3, injection hole 4, compression hole 5, guide hole 6, mounting hole 7;

[0029] A first cylindrical section 11, a truncated cone section 12, a second cylindrical section 13, a first sealing ring groove 14, a first sealing ring 15, a second sealing ring groove 16, and a second sealing ring 17;

[0030] Groove 21 , sealing cover 22 , locking piece 23 , chamfer 24 , flange 25 . DETAILED DESCRIPTION

[0031] like Figure 1-9As shown, a nozzle for a plasma cutting machine in this embodiment includes a nozzle body 1, an intermediate channel 2 is provided in one end of the nozzle body 1, and a plurality of through holes 3 are provided on one side of the nozzle body 1, each through hole 3 is evenly distributed circumferentially with the nozzle body 1 as the center, and each through hole 3 extends to the intermediate channel 2. Among the through holes 3, at least one through hole 3 is used to transport coolant into the intermediate channel 2, and the through hole 3 used for transporting coolant into the intermediate channel 2 is an input channel, and at least one through hole 3 is used to output the coolant in the intermediate channel 2, and the through hole 3 used for outputting the coolant in the intermediate channel 2 is an output channel. During operation, the cooling system on the plasma cutting machine transports the coolant from the input channel to the intermediate channel 2, and the coolant in the intermediate channel 2 is then discharged from the output channel. Through the flow of the coolant in the input channel, the intermediate channel 2 and the output channel, the heat generated on the nozzle body 1 is transported to the coolant and then discharged, thereby improving the cooling uniformity and extending the service life;

[0032] The number of the through holes 3 is an even number, specifically two, four, six or eight, etc. When the number of the through holes 3 is eight, the number of the input channels and the number of the output channels are both four, and the four input channels and the four output channels are staggered;

[0033] The intermediate channel 2 includes a groove 21 and a sealing cover 22. The groove 21 is provided at one end of the nozzle body 1. The sealing cover 22 matches the groove 21. The sealing cover 22 is sealingly provided at the notch of the groove 21. The outer side of the sealing cover 22 is in the same plane as the end of the nozzle body 1. The sealing cover 22 is detachably fixedly connected to the nozzle body 1 via a locking member 23. The locking member 23 is a screw. There are multiple screws, and the multiple screws are evenly distributed circumferentially with the nozzle body 1 as the center.

[0034] The groove 21 is annular, and the inner and outer circumferential walls of the notch end of the groove 21 are both provided with chamfers 24. The inner and outer circumferential walls of the sealing cover 22 are both provided with flanges 25. The flanges 25 correspond to and match the chamfers 24 one by one. The flanges 25 fit in with the chamfers 24, and the sealing cover 22 is positioned by fitting the flanges 25 and the chamfers 24 together.

[0035] The nozzle body 1 is provided with an injection hole 4, a compression hole 5, a guide hole 6 and a mounting hole 7. The injection hole 4, the compression hole 5, the guide hole 6 and the mounting hole 7 are coaxially connected in sequence. The injection hole 4 is located at one end of the nozzle body 1, and the mounting hole 7 is located at the other end of the nozzle body 1. The compression hole 5 and the guide hole 6 are both truncated cone-shaped. The aperture of the injection hole 4 is equal to the minor diameter of the compression hole 5, the major diameter of the compression hole 5 is equal to the minor diameter of the guide hole 6, and the aperture of the mounting hole 7 is larger than the major diameter of the guide hole 6. During operation, a vortex ring is installed at the mounting hole 7 to pass one end of the plasma cutting electrode through the vortex ring. The plasma cutting gas enters the compression hole 5, and the plasma cutting gas is transformed into a spiral motion through the vortex ring. The plasma gas passes through the guide hole 6, which guides the spiral motion of the plasma gas, so that the plasma gas forms a better spiral motion on the inner surface of the nozzle body 1 and the outer surface of the electrode, so that the plasma arc has better penetration and produces a better cutting end face. Then the plasma gas enters the compression hole 5 for compression, and the plasma cutting electrode emits electrons. The compressed plasma gas passes through the injection hole 4, and a high-temperature and high-speed plasma flow is ejected from the injection hole 4 onto the workpiece, so that the metal temperature at the cutting seam rises rapidly and melts, thereby realizing plasma cutting;

[0036] The nozzle body 1 includes a first cylindrical section 11, a frustum section 12, and a second cylindrical section 13. The first cylindrical section 11, the frustum section 12, and the second cylindrical section 13 are coaxially arranged. The first cylindrical section 11 is located at the small diameter end of the frustum section 12, and the first cylindrical section 11 is located at the large diameter end of the frustum section 12. The diameter of the second cylindrical section 13 is equal to the large diameter of the frustum section 12. The intermediate channel 2 is located at the end of the second cylindrical section 13 away from the frustum section 12, and one end of the through hole 3 is located on the conical surface of the frustum section 12.

[0037] A first sealing ring groove 14 is provided on the outer peripheral wall of the first cylindrical section 11, and the first sealing ring groove 14 is used to install a first sealing ring 15. A second sealing ring groove 16 is provided on the outer peripheral wall of the second cylindrical section 13, and the second sealing ring 16 is used to install a second sealing ring 17. The second sealing ring 17 is used to achieve a seal between the nozzle body and the upper gun body of the plasma cutting machine;

[0038] There are two second sealing ring grooves 16, and the two second sealing ring grooves 16 are spaced apart along the length direction of the second cylindrical section 13;

[0039] In summary, by providing the intermediate channel 2 and multiple through holes 3 connected thereto on the nozzle body 1, the coolant flows in the intermediate channel 2 and multiple through holes 3 connected thereto, thereby improving the cooling uniformity of the nozzle body 1 and extending the service life of the nozzle body 1.

[0040] In addition to the above embodiments, the present invention also includes other implementation methods. Any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of protection of the claims of the present invention.

Claims

1. A nozzle for a plasma cutting machine, comprising a nozzle body (1), characterized in that: An intermediate channel (2) is provided in one end of the nozzle body (1), and a plurality of through holes (3) are provided on one side of the nozzle body (1). The through holes (3) are circumferentially distributed with the nozzle body (1) as the center, and the through holes (3) extend to the intermediate channel (2). Among the through holes (3), at least one through hole (3) is used to transport coolant into the intermediate channel (2), and the through hole (3) used to transport coolant into the intermediate channel (2) is an input channel. At least one through hole (3) is used to output coolant in the intermediate channel (2), and the through hole (3) used to output coolant in the intermediate channel (2) is an output channel.

2. The nozzle for a plasma cutting machine according to claim 1, characterized in that: The number of the through holes (3) is an even number.

3. The nozzle for a plasma cutting machine according to claim 2, characterized in that: The number of the through holes (3) is an even number of eight, the number of the input channels and the number of the output channels are both four, and the four input channels and the four output channels are staggered.

4. The nozzle for a plasma cutting machine according to claim 1, characterized in that: The intermediate channel (2) comprises a groove (21) and a sealing cover (22); the groove (21) is arranged at one end of the nozzle body (1); the sealing cover (22) matches the groove (21); the sealing cover (22) is sealingly arranged at the notch of the groove (21); and the sealing cover (22) is fixedly connected to the nozzle body (1).

5. The nozzle for a plasma cutting machine according to claim 4, characterized in that: The outer side of the sealing cover (22) is in the same plane as the end of the nozzle body (1).

6. The nozzle for a plasma cutting machine according to claim 4, characterized in that: The sealing cover (22) is detachably fixedly connected to the nozzle body (1) via a locking piece (23).

7. The nozzle for a plasma cutting machine according to claim 4, characterized in that: The groove (21) is annular, and the inner and outer circumferential walls of the notch end of the groove (21) are both provided with chamfers (24). The inner and outer circumferential walls of the sealing cover (22) are both provided with flanges (25), and the flanges (25) correspond to and match the chamfers (24) one by one, and the flanges (25) fit the chamfers (24).

8. The nozzle for a plasma cutting machine according to claim 1, characterized in that: The nozzle body (1) is provided with an injection hole (4), a compression hole (5), a flow guide hole (6) and a mounting hole (7); the injection hole (4), the compression hole (5), the flow guide hole (6) and the mounting hole (7) are coaxially connected in sequence; the injection hole (4) is located at one end of the nozzle body (1); the mounting hole (7) is located at the other end of the nozzle body (1); the compression hole (5) and the flow guide hole (6) are both truncated cone-shaped; the aperture of the injection hole (4) is equal to the minor diameter of the compression hole (5); the major diameter of the compression hole (5) is equal to the minor diameter of the flow guide hole (6); and the aperture of the mounting hole (7) is larger than the major diameter of the flow guide hole (6).

9. The nozzle for a plasma cutting machine according to claim 1, characterized in that: The nozzle body (1) comprises a first cylindrical section (11), a frustum section (12) and a second cylindrical section (13); the first cylindrical section (11), the frustum section (12) and the second cylindrical section (13) are coaxially arranged; the first cylindrical section (11) is located at the small-diameter end of the frustum section (12); the first cylindrical section (11) is located at the large-diameter end of the frustum section (12); the diameter of the second cylindrical section (13) is equal to the large-diameter of the frustum section (12); the intermediate channel (2) is located at an end of the second cylindrical section (13) away from the frustum section (12); and one end of the through hole (3) is located on the conical surface of the frustum section (12).

10. The nozzle for a plasma cutting machine according to claim 9, characterized in that: A first sealing ring groove (14) is provided on the outer peripheral wall of the first cylindrical section (11), and the first sealing ring groove (14) is used to install a first sealing ring (15). A second sealing ring groove (16) is provided on the outer peripheral wall of the second cylindrical section (13), and the second sealing ring groove (16) is used to install a second sealing ring (17).

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