Coolant pipe for plasma cutting

Abstract

The utility model relates to a coolant pipe for plasma cutting, which belongs to the field of coolant pipes and comprises a pipe body, a sealing ring is hermetically and fixedly arranged on the outer wall of the pipe body, an annular groove is arranged on the sealing ring, at least two positioning convex plates are arranged at one end of the pipe body, and the positioning convex plates are circumferentially distributed by taking the axis of the pipe body as the center. According to the utility model, the positioning convex plate is sleeved on the cooling core in the inner cavity of the electrode, so that the tube body and the electrode are matched and fixed, the tube body is prevented from shaking in the use process to influence the cooling effect, and in addition, the positioning block is propped against the inner wall of the electrode cavity, so that the radial positioning of the tube body is realized; and moreover, by adjusting the distance between the positioning block and the pipe body, the electrode cooling device is suitable for electrodes of different sizes, and the application range is expanded.

Description

Technical Field

[0001] The utility model relates to a coolant pipe for plasma cutting, belonging to the field of coolant pipes. Background Art

[0002] Plasma arc cutting is a processing method that uses the heat of a high-temperature plasma arc to locally melt (and vaporize) the metal at the workpiece cutting edge, and discharges the molten metal by the momentum of the high-speed plasma to form a cutting edge.

[0003] The invention patent with the publication number of CN101579778A discloses a method and device for aligning the parts of a plasma arc cutter. Among them, a coolant pipe for a plasma arc cutter includes: a slender body having a first end, a second end, and a coolant channel extending through both ends of the slender body, wherein the slender body is non-rigidly attached to the cutter body; and a surface located on the outside of the slender body and adapted to cooperate with the electrode and align the electrode along the longitudinal axis direction of the slender body. It ensures the proper flow of the coolant along the inner surface of the electrode. On the one hand, a surface of the slender body of the coolant pipe is adapted to cooperate with the electrode. On the other hand, the slender body of the electrode has a surface adapted to cooperate with the coolant pipe. However, the existing coolant pipe shakes dynamically during use, generating resistance to the flow of the coolant and affecting the cooling effect.

[0004] Therefore, there is a need for a coolant pipe for plasma cutting to avoid the shaking of the coolant pipe from affecting the cooling effect. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is: in order to overcome the deficiencies of the prior art, to provide a coolant pipe for plasma cutting that can avoid the shaking of the coolant pipe from affecting the cooling effect.

[0006] The technical solution adopted by the utility model to solve the above problems is: a coolant pipe for plasma cutting, including a pipe body, a sealing ring is hermetically and fixedly arranged on the outer wall of the pipe body, an annular groove is opened on the sealing ring, and at least two positioning convex plates are arranged at one end of the pipe body, and each positioning convex plate is circumferentially distributed around the axis of the pipe body.

[0007] Preferably, a plurality of positioning components are arranged on the outer wall of the pipe body, and the plurality of positioning components are circumferentially distributed around the axis of the pipe body.

[0008] Preferably, the number of the positioning components is three.

[0009] Preferably, the positioning assembly includes a fixing bar fixedly arranged on the outer wall of the pipe body. A sliding groove is arranged on the fixing bar and extends to one side of the fixing bar along the length direction of the pipe body. A positioning block is arranged in the sliding groove. The positioning block protrudes from the side of the fixing bar away from the pipe body. The positioning block is inclined and slidably connected with the sliding groove along the length direction of the pipe body. The positioning block is locked with the fixing bar through a locking member.

[0010] Preferably, the sliding groove is located on the side of the fixing bar away from the pipe body.

[0011] Preferably, guide grooves are arranged on the inner walls on both sides of the sliding groove. The two ends of the guide groove are arranged obliquely along the length direction of the pipe body. A guide rod is slidably connected in the guide groove. The guide rod matches the guide groove and is fixedly arranged on the positioning block.

[0012] Preferably, the side of the positioning block away from the axis of the pipe body bulges outwards, and the bulge is arc-shaped.

[0013] Preferably, the locking member is a tightening screw. The tightening screw is threadedly connected with the positioning block, and one end of the tightening screw abuts against the inner wall of the sliding groove close to the pipe body.

[0014] Preferably, there are two tightening screws, and the two tightening screws are distributed along the axis direction of the pipe body.

[0015] Preferably, the two tightening screws are symmetrically arranged with respect to the bulge.

[0016] Compared with the prior art, the advantages of the present utility model are as follows:

[0017] For the coolant pipe for plasma cutting of the present utility model, the positioning convex plate is sleeved on the cooling core in the inner cavity of the electrode to realize the fitting and fixing of the pipe body and the electrode, avoiding the influence of the shaking of the pipe body on the cooling effect during use. In addition, by abutting the positioning block against the inner wall of the electrode cavity, the radial positioning of the pipe body is realized, further avoiding the influence of the shaking of the pipe body on the cooling effect during use. Moreover, by adjusting the distance between the positioning block and the pipe body, it is convenient to be applicable to electrodes of different sizes, expanding the scope of application. Description of the Drawings

[0018] Figure 1 is a perspective view of the coolant pipe for plasma cutting of the present utility model;

[0019] Figure 2 is a cross-sectional view of the coolant pipe for plasma cutting of the present utility model;

[0020] Figure 3 is Figure 2 the enlarged view of part A of

[0021] Figure 4 Schematic diagram of the connection structure of the positioning block, guide rod and tightening screw;

[0022] Figure 5 Stereogram of the fixing strip;

[0023] Figure 6 Schematic diagram of the connection structure of the pipe body, torch body and electrode;

[0024] Figure 7 is Figure 6 Enlarged view of part B of

[0025] Wherein:

[0026] Pipe body 1, sealing ring 2, annular groove 3, positioning convex plate 4, torch body 5, electrode 6, positioning assembly 7;

[0027] Fixing strip 71, sliding groove 72, positioning block 73, guide groove 74, guide rod 75, tightening screw 76. Specific implementation mode

[0028] As Figures 1-7 shown, a coolant pipe for plasma cutting in this embodiment includes a pipe body 1, a sealing ring 2 is hermetically and fixedly arranged on the outer wall of the pipe body 1, an annular groove 3 for installing an O-ring is opened on the sealing ring 2, and at least two positioning convex plates 4 are arranged at one end of the pipe body 1. Each positioning convex plate 4 is circumferentially and evenly distributed around the axis of the pipe body 1. During use, one end of the pipe body 1 is inserted into the torch body 5. There is no positioning convex plate 4 at this end of the pipe body 1, and the O-ring is installed in the annular groove 3. The sealing ring 2 is fixed in the torch through the interference fit of the O-ring, that is, the seal between the outer wall of the pipe body 1 and the inner wall of the torch body 5 is realized. Subsequently, the electrode is connected to the torch by threading. At this time, the other end of the pipe body 1 is inserted into the inner cavity of the electrode, that is, the end of the pipe body 1 provided with the positioning convex plate 4 is inserted into the inner cavity of the electrode, and the cooling core in the inner cavity of the electrode is sleeved through the positioning convex plate 4;

[0029] When working, the coolant is pressurized by a water pump from the water tank, passes through the cable and the torch, and flows into the pipe body 1 from one end of the pipe body 1 located in the torch body 5, flows to the electrode cooling core, and then enters the sandwich formed by the outer cavity of the pipe body 1 and the inner cavity of the electrode through the gap between the electrode cooling core and the other end of the pipe body 1, returns to the torch body 5, and then returns to the water tank through the cable to form a complete loop. During this period, the cooling core in the inner cavity of the electrode is sleeved through the positioning convex plate 4 to realize the fitting and fixing of the pipe body 1 and the electrode, and to prevent the pipe body 1 from shaking during use and affecting the cooling effect;

[0030] A plurality of positioning assemblies 7 are arranged on the outer wall of the pipe body 1. The plurality of positioning assemblies 7 are circumferentially and evenly distributed around the axis of the pipe body 1. The specific number of the positioning assemblies 7 is three;

[0031] The positioning component 7 includes a fixing strip 71 which is fixedly arranged on the outer wall of the pipe body 1. A sliding groove 72 is arranged on the fixing strip 71. The sliding groove 72 is located on the side of the fixing strip 71 away from the pipe body 1. The sliding groove 72 extends along the length direction of the pipe body 1 to one side of the fixing strip 71. A positioning block 73 is arranged in the sliding groove 72. The positioning block 73 protrudes from the side of the fixing strip 71 away from the pipe body 1. The positioning block 73 is slidably connected to the sliding groove 72 in an inclined manner along the length direction of the pipe body 1. During the sliding process of the positioning block 73 and the sliding groove 72, the distance between the positioning block 73 and the axis of the pipe body 1 increases or decreases. The positioning block 73 is locked with the fixing strip 71 through a locking member;

[0032] When the end of the pipe body 1 provided with the positioning convex plate 4 is inserted into the inner cavity of the electrode, the side of the positioning block 73 away from the axis of the pipe body 1 abuts against the inner wall of the electrode cavity. In this way, the radial positioning of the pipe body 1 is realized, and further, the shaking of the pipe body 1 during use is avoided, which affects the cooling effect;

[0033] Guide grooves 74 are arranged on both inner walls of the sliding groove 72. The two ends of the guide groove 74 are arranged in an inclined manner along the length direction of the pipe body 1. A guide rod 75 is slidably connected in the guide groove 74. The guide rod 75 matches the guide groove 74. The guide rod 75 is fixedly arranged on the positioning block 73;

[0034] The side of the positioning block 73 away from the axis of the pipe body 1 protrudes outward, and the outward protrusion is arc-shaped;

[0035] The locking member is a tightening screw 76. The tightening screw 76 is threadedly connected to the positioning block 73. One end of the tightening screw 76 abuts against the inner wall of the sliding groove 72 on the side close to the pipe body 1;

[0036] There are two tightening screws 76, and the two tightening screws 76 are distributed along the axis direction of the pipe body 1;

[0037] The two tightening screws 76 are symmetrically arranged with respect to the outward protrusion;

[0038] When it is necessary to adjust the distance between the outward protrusion and the pipe body 1 according to the size of the inner cavity of the electrode, loosen the tightening screw 76 to make the guide rod 75 move obliquely in the sliding groove 72. The movement of the guide rod 75 drives the positioning block 73 to move synchronously, that is, to adjust the distance between the outward protrusion and the pipe body 1. After the adjustment is completed, tighten the tightening screw 76 to make one end of the tightening screw 76 abut against the inner wall of the sliding groove 72, and make the positioning block 73 receive a thrust force in the direction away from the pipe body 1, so as to realize the locking between the guide rod 75 and the guide groove 74, that is, to realize the locking between the positioning block 73 and the pipe body 1. When the pipe body 1 is inserted into the inner cavity of the electrode, the outward protrusion abuts against the inner wall of the electrode cavity. In this way, it is convenient to be applicable to electrodes of different sizes, and the applicable range is expanded.

[0039] In addition to the above embodiments, the present utility model also includes other implementation manners. Any technical solutions formed by means of equivalent transformation or equivalent substitution shall fall within the protection scope of the claims of the present utility model.

Claims

1. A coolant tube for plasma cutting, comprising a tube body (1), a sealing ring (2) being sealed and fixedly arranged on the outer wall of the tube body (1), and an annular groove (3) being formed on the sealing ring (2), characterized in that: At least two positioning convex plates (4) are provided at one end of the tube body (1), and the positioning convex plates (4) are distributed circumferentially with the axis of the tube body (1) as the center.

2. A plasma cutting coolant tube according to claim 1, characterized in that: A plurality of positioning components (7) are arranged on the outer wall of the tube body (1), and the plurality of positioning components (7) are distributed circumferentially with the axis of the tube body (1) as the center.

3. A plasma cutting coolant tube according to claim 2, characterized in that: The number of the positioning components (7) is three.

4. The coolant tube for plasma cutting according to claim 2, characterized in that: The positioning assembly (7) comprises a fixing strip (71), wherein the fixing strip (71) is fixedly arranged on the outer wall of the tube body (1), and a slide groove (72) is arranged on the fixing strip (71), and the slide groove (72) extends to one side of the fixing strip (71) along the length direction of the tube body (1), and a positioning block (73) is arranged in the slide groove (72), and the positioning block (73) protrudes from a side of the fixing strip (71) away from the tube body (1), and the positioning block (73) is connected to the slide groove (72) in an inclined sliding manner along the length direction of the tube body (1), and the positioning block (73) is locked with the fixing strip (71) through a locking member.

5. A plasma cutting coolant tube according to claim 4, characterized in that: The sliding groove (72) is located on a side of the fixing strip (71) away from the tube body (1).

6. A plasma cutting coolant tube according to claim 4, characterized in that: Guide grooves (74) are provided on the inner walls of both sides of the slide groove (72), and the two ends of the guide groove (74) are arranged obliquely along the length direction of the tube body (1). A guide rod (75) is slidably connected in the guide groove (74), and the guide rod (75) matches the guide groove (74). The guide rod (75) is fixedly arranged on the positioning block (73).

7. The coolant tube for plasma cutting according to claim 4, characterized in that: The side of the positioning block (73) away from the axis of the tube body (1) is convex, and the convexity is arc-shaped.

8. The coolant tube for plasma cutting according to claim 4, characterized in that: The locking member is a tightening screw (76), which is threadedly connected to the positioning block (73), and one end of the tightening screw (76) abuts against the inner wall of the slide groove (72) on the side close to the tube body (1).

9. A plasma cutting coolant tube according to claim 8, characterized in that: Two tightening screws (76) are provided, and the two tightening screws (76) are distributed along the axis direction of the tube body (1).

10. The coolant tube for plasma cutting according to claim 7, characterized in that: The two tightening screws (76) are arranged symmetrically about the outer projection.

Images