Handle for a plasma torch

Abstract

The present invention relates to a handle of a plasma torch, and more particularly, to a handle of a plasma torch which enables a welding torch head to be rotated by a certain angle to the left or right side and enables the welding torch head to be withdrawn or inserted by a certain length from the handle, so that an operator can simply and conveniently use the plasma torch, and a safety accident is prevented by a double-switch type switch.

Description

Technical Field

[0001] This invention relates to a handle for a plasma torch, specifically designed to prevent errors caused by interference from other structures or objects that could disrupt the operation of the torch handle when it is placed on the floor or an object for inspection or rest. The torch head can be rotated to the left or right at a certain angle, and can be pulled out or inserted a certain length from the handle, thereby improving operator convenience and preventing safety accidents. Background Technology

[0002] Plasma cutting systems generate plasma from a high-temperature ionized gas to cut metals or other conductive materials. Typically, an electric arc converts a gas (e.g., compressed air) into plasma, and the plasma's temperature is high enough that the gas pressure allows molten metal to be blown away in time to melt the workpiece. An electric arc is ignited in a plasma torch through which gas flows.

[0003] A plasma torch is used to guide and control plasma for cutting. As the tip of the plasma torch passes over the workpiece, the high-temperature plasma cuts the workpiece along this path.

[0004] On the one hand, Korean Utility Model Publication No. 20-1999-0015094 discloses a "handle structure for a welding torch". Figure 1 This is a three-dimensional view of the handle structure of an existing welding torch in a separated state.

[0005] like Figure 1 As shown, the existing welding torch handle structure includes: a pair of handles 10, 20, each having male threaded portions 11, 21 at both ends, and divided into two parts with insertion slots 12, 22 for inserting a support body 2 into the welding torch head H and setting spaces 13, 23 inside; front and rear fastening caps 30, 40, which are fastened to the male threaded portions 11, 21 of the handles 10, 20 for engaging the handles 10, 20; switch mounting spaces 50, 60, which are formed such that the upper edge of the handles 10, 20 protrudes, and one side has a button protrusion slot 51, 61; insulating plates 70, 80, which are integrally formed with the handles 10, 20 at the bottom of the switch mounting spaces 50, 60; and multiple support grooves 90, 100, which are formed in the insertion slots 12, 22 of the handles 10, 20 for inserting and connecting the support protrusions 2' of the support body 2.

[0006] However, since the handle structure of such existing welding torches is not designed to allow the torch head to rotate to the left or right, when cutting the iron plate while it is tilted to the right or left, the operator has to change their posture or wrist to the right or left to perform the cutting operation, which is very inconvenient.

[0007] Furthermore, since it lacks the function of extending or retracting the welding torch head from the handle, there is a problem that the length of the welding torch head cannot be adjusted according to the working conditions.

[0008] Existing technical documents

[0009] Patent documents

[0010] (Patent Document 0001) Korean Utility Model Publication No. 20-1999-0015094 (Published on May 15, 1999) Summary of the Invention

[0011] Technical problems to be solved

[0012] This invention is proposed to solve the above-mentioned problems. One purpose of this invention is to enable the welding torch head to rotate to the left or right at a certain angle and to allow the welding torch head to be pulled out or inserted into the handle for a certain length. Another purpose is to set up a double switch to prevent safety accidents.

[0013] Problem Solution

[0014] To achieve the above objectives, the handle 700 of the plasma torch of the present invention includes: an upper cover 300, which has first and second power rails 308 and 309, first and second power contact portions 303 and 304 formed inside, and a first space portion 306 inserted into the upper part of the insulating cover 200, and a first switch 302 formed outside, with male thread portions 301 and 305 formed at both ends; a lower cover 400, which has insulating cover lower support portions 410 and 411, third and fourth power contact portions 403 and 404 formed inside, and a second space portion 406 inserted into the lower part of the insulating cover 200, and a second switch 402 formed outside, with male thread portions 401 and 405 formed at both ends; and front and rear nuts 500 and 600, which are used to fasten the male thread portions 301, 305, 401, and 405 of the upper and lower covers 300 and 400.

[0015] The insulating cover 200 has a long groove 201 for inserting a locking pin 102 at the front, upper support claws 202 and 203 and two electrodes 205 and 206 spaced apart on both sides at the rear upper part, and lower support claws 204 spaced apart on both sides at the lower part.

[0016] The insertion rod 107 of the welding torch head 100 connected to the insulating cover 200 has a crimping ring 101, a groove 103 for inserting into the insulator 104, and a locking pin 102 for inserting into the long groove 201.

[0017] Here, a drive groove 113 is formed on the upper part of the locking pin 102, and a locking member 102' is formed on the lower part. The insertion groove 107 for mounting the locking pin 102 is formed with a sliding hole 112 for the locking pin 102 to move up and down. A locking hole 112' for the locking member 102' to move up and down is formed on the lower part of the sliding hole 112, and a space portion 110 for accommodating the locking member 102' and the spring 109 is formed.

[0018] In addition, the second switch 402 is composed of third and fourth power contact parts 403 and 404, baffle 413 and spring 411. When the button integrally formed with the baffle 413 is pressed or the pressure is released, the baffle 413 disengages from or inserts between the third and fourth power contact parts 403 and 404, so that the third and fourth power contact parts 403 and 404 may or may not contact each other.

[0019] Invention Effects

[0020] As described above, the present invention relates to a handle 700 for a plasma torch, which allows the torch head to rotate to the left or right at a certain angle and allows the torch head to be pulled out or inserted into the handle 700 for a certain length, thereby enabling the operator to use the plasma torch simply and conveniently, and the dual-switch switching method has the effect of preventing safety accidents. Attached Figure Description

[0021] Figure 1 This is a three-dimensional diagram of the existing plasma torch handle structure.

[0022] Figure 2 This is an assembled perspective view of the plasma torch handle of the present invention.

[0023] Figure 3 This is an exploded perspective view of the plasma torch handle of the present invention.

[0024] Figure 4 This is an enlarged exploded perspective view of the welding torch head of the present invention.

[0025] Figure 5 This is a cross-sectional perspective view of the locking and unlocking states of the locking pin of the present invention.

[0026] Figure 6 This is a three-dimensional schematic diagram of the interior of the upper and lower covers of the present invention.

[0027] Figure 7 This is a three-dimensional schematic diagram of the second switch of the present invention before and after operation.

[0028] Figure 8 This is a cross-sectional view of the handle of the present invention from the rear.

[0029] Figure 9 This is a circuit diagram of the first and second switches of the present invention.

[0030] Explanation of reference numerals in the attached figures

[0031] 100: Welding torch head; 101: Crimping ring

[0032] 102: Locking component; 103: Groove.

[0033] 104: Insulator; 105: Gas supply pipe (power transmission line)

[0034] 106: Power cord 107: Insert rod

[0035] 108: Nozzle head; 200: Insulating cover

[0036] 201: Long slot; 202: Upper support claw

[0037] 203: Upper support claw; 204: Lower support claw

[0038] 205: Electrode 206: Electrode

[0039] 207: Wire 300: Top Cover

[0040] 301: Male threaded section; 302: First switch

[0041] 303: First power contact part; 304: Second power contact part

[0042] 305: Male thread section; 306: First space section

[0043] 310: Support part on the insulating cover 311: Support part on the insulating cover

[0044] 400: Lower cover; 401: Male thread section

[0045] 402: Second switch; 403: Third power contact

[0046] 404: Fourth power contact part; 405: Male thread part

[0047] 406: Second spatial section; 407: First convex section

[0048] 408: Second convex portion 409: Third convex portion

[0049] 410: Under-insulation cover support part 411: Under-insulation cover support part

[0050] 412: Spring; 413: Baffle

[0051] 500: Front nut; 501: O-ring

[0052] 600: Rear nut; 700: Handle Detailed Implementation

[0053] The objects, features, and advantages of the present invention described above will become clearer from the following detailed description. Preferred embodiments of the invention are described below with reference to the accompanying drawings.

[0054] Figure 2 The embodiment of the present invention relates to a plasma torch handle 700, as shown in the figure. A welding torch head 100 is formed at the front of the handle 700, and a pair of upper and lower covers 300 and 400 are fastened at the rear using front and rear nuts 500 and 600.

[0055] That is, the handle 700 of the plasma torch of the present invention has a structure in which the upper cover 300 and the lower cover 400 are connected to form the handle 700.

[0056] In addition, such as Figure 3 and Figure 6 As shown, the upper cover 300 has first and second power rails 308 and 309, first and second power contact portions 303 and 304, and a first space portion 306 inserted into the upper side of the hollow cylindrical insulating cover 200. The upper side has a first switch 302, and male thread portions 301 and 305 are formed at both ends.

[0057] In addition, the interior of the lower cover 400 has an insulating cover support portion 410, 411 and a third and fourth power contact portion 403, 404, as well as a second space portion 406 that is inserted into the lower side of the insulating cover 200. The exterior has a second switch 402 and male thread portions 401, 405 at both ends.

[0058] Additionally, before fastening the male threaded portions 301, 305, 401, 405 of the upper and lower covers 300 and 400 to form the handle 700 of the plasma torch, a front and rear nut 500 and 600 may be included, with the interior of the front nut 500 including an O-ring 501.

[0059] Here, the plasma torch handle is connected as follows: after the hollow cylindrical insulating cover 200 connects to the upper cover 300 and lower cover 400 of the handle 700, the front nut 500, which includes an O-ring 501, is tightened to the front male threaded portions 301 and 401 of the upper and lower covers 300 and 400 of the handle 700, and the rear nut 600 is tightened to the rear male threaded portions 305 and 405 of the upper and lower covers 300 and 400 of the handle 700, thereby completing the connection of the plasma torch handle.

[0060] At this point, of course, before connecting the upper and lower covers 300 and 400, the hollow cylindrical insulating cover 200 is inserted into the interior of the upper and lower covers 300 and 400.

[0061] In addition, a long groove 201 for inserting a locking pin 102 is formed at the front of the hollow cylindrical insulating cover 200, and upper support claws 202 and 203 and two electrodes 205 and 206 are formed at the rear upper part, and two lower support claws 204 are formed at the lower part.

[0062] Here, the two electrodes 205 and 206 formed on the upper part of the hollow cylindrical insulating cover 200 are in contact with the first and second power rails 308 and 309 of the upper cover 300, respectively. Even if the insulating cover 200 moves forward and backward, the two electrodes 205 and 206 and the first and second power rails 308 and 309 continue to maintain contact with each other.

[0063] That is, after the hollow cylindrical insulating cover 200 is inserted and connected to the inside of the upper and lower covers 300 and 400, the insulating cover 200 inside the handle 700 moves forward and backward, so that even if the length of the welding torch head changes, the two electrodes 205 and 206 formed on the upper part of the insulating cover 200 will still contact the first and second power rails 308 and 309 respectively, and continue to maintain the electrical connection.

[0064] Furthermore, the insulating cover 200 is connected to the insertion rod 107 of the welding torch head 100 before being inserted into the upper and lower covers 300 and 400.

[0065] Here, the insertion rod 107 formed on one side of the welding torch head 100 has a crimping ring 101, a groove 103 for inserting into the insulator 104, and a locking pin 102 for inserting into the long groove 201. The insertion rod 107 is inserted into the insulating cover 200. The crimping ring 101 maintains the airtightness between them. With the handle 700 fixed with the left hand, the welding torch head 100 can be rotated to the left, center, or right with the right hand, thereby adjusting the welding torch head 100 to any angle. After the insertion rod 107 inserted into the insulating cover 200 is rotated to any angle, when the rotational force of the right hand is removed, the insertion rod 107 no longer rotates, thus maintaining the arbitrary angle of rotation.

[0066] At this time, of course, an air supply pipe (or power transmission line) and a power cord are installed on the upper and lower sides of the groove 103 respectively. After the insulator 104 is inserted into the groove 103, the insertion rod 107 is inserted into the inner circumferential surface of the insulating cover 201 in close contact.

[0067] Furthermore, the elongated groove 201 is formed to a greater extent to the left and right along the rotation direction of the insulating cover 200, forming a semi-circular seat groove so that the locking component is installed in the center of the left and right ends. Therefore, if the welding torch head is rotated so that the locking component of the insertion rod is in the center of the elongated groove 201, and then the welding torch head is pulled forward, the locking component will be installed in the mounting groove, and the welding torch head will no longer rotate to the left or right, remaining fixed in the central position.

[0068] like Figure 6 and Figure 8 As shown, the upper support portions 310 and 311 and the lower support portions 410 and 411 of the insulating cover are respectively formed inside the space portions 306 and 406 of the upper and lower covers, thereby restricting the rotation of the insulating cover 200 inserted into the upper and lower covers.

[0069] That is, the upper and lower support claws 202, 203, and 204 of the insulating cover 200 respectively support the upper and lower support parts 310, 311, 410, and 411 of the insulating cover from the upper and lower sides toward the insulating cover 200, so that the insulating cover 200 inserted into the upper and lower covers can move forward and backward, while left and right rotation is restricted.

[0070] Figure 5 The figure shows a view of the locking pin 102 installed on the insertion rod 107 before (a) and after (b) operation. As shown, the upper part of the locking pin 102 has a drive groove 113 and the lower part has a locking member 102'. The insertion rod 107 on which the locking pin 102 is installed has a sliding hole 112 for guiding the locking pin 102 to move up and down. The lower end of the sliding hole 112 has a locking hole (not shown) for the locking member 102' to move up and down, and a space portion 110 for accommodating the locking member 102' and the spring 109.

[0071] Here, the insertion rod 107 is pressed into the interior of the insulating cover 200 for connection. At this time, the locking pin 102 must not protrude beyond the outer circumference of the insertion rod 107. The insertion rod 107 is inserted into the interior of the insulating cover 200. After these connections are completed, the locking pin 102 is protruded into the long groove 201 of the insulating cover 200, so that the insertion rod 107 is inserted into the insulating cover 200 to complete the connection. After the locking pin 102 is inserted into and protrudes into the long groove 201, the insulating cover 200 is inserted into the upper and lower covers 300 and 400, and tightened by the front and rear nuts 500 and 600. Then, with the nozzle of the welding torch head facing downward, the handle 700 is fixed with the left hand, and the welding torch head, which is integrally formed with the insertion rod 107, can be moved to the left, center, or right by a certain range (forming the range of the long groove). The insertion rod 107 will no longer detach from the insulating cover 200.

[0072] That is, when the insertion rod 107 is inserted into the insulating cover 200, firstly, while pressing the locking pin 102 with the driver, it is rotated halfway to the right (or left) until the locking member 102' is locked in the locking claw 111 of the space 110. Then, the insertion rod 107 is inserted into the insulating cover 200. When the insertion rod 107 is inserted into the insulating cover 200 and the locking member 102 is in the position where it can be inserted into the long slot 201, the driver is rotated halfway to the left (or right) to release the locking member 102' from the locking claw 111 of the space 110, so that the locking member 102 protrudes from the long slot 201 and the insulating cover 200 inserted into the insertion rod 107 no longer comes off.

[0073] Figure 7 This is a view showing the second switch 402 of the lower cover 400 before (a) and after (b) operation. The second switch 402 has third and fourth power contacts 403 and 404, a baffle 413 and a spring 411. When the button integrally formed with the baffle 413 is pressed from bottom to top or the pressure is released, the baffle 413 will disengage from or insert between the third and fourth power contacts 403 and 404, thereby making the third and fourth power contacts 403 and 404 either in contact or not in contact with each other.

[0074] That is, when the second switch 402 is pressed from the bottom to the top, the baffle 413 disengages from between the third and fourth power contacts 403 and 404, so that the third and fourth power contacts 403 and 404 are in contact with each other by elastic force to maintain the electrical on (ON) state. When the pressure of the second switch 402 is removed, the baffle 413 is inserted between the third and fourth power contacts 403 and 404, so that the third and fourth power contacts 403 and 404 are separated to achieve the electrical off (OFF) state.

[0075] Figure 8 This is a cut-section diagram showing the state of the insulating cover 200 inserted into the upper and lower covers 300 and 400. The lower left and right sides of the insulating cover 200 have protrusions and grooves respectively.

[0076] Here, the wires 207 are inserted into the left and right slots of the groove respectively, and the inserted wires 207 are restricted from detaching from the groove.

[0077] refer to Figure 9 The circuits of the first and second switches 302 and 402 shown are used to observe their working relationship. When the operator holds the handle 700 and simultaneously presses the first switch located outside the upper cover of the handle 700 and the second switch located outside the lower cover of the handle 700, the plasma torch operates while maintaining the electrical ON state.

[0078] That is, the plasma torch includes: a handle 700 held by the operator, a welding torch head 100 extending forward of the handle 700, a nozzle head 108 formed in front of the welding torch head 100, and an electric wire 207 extending backward of the welding torch head 100. When the operator holds the handle 700, a first switch 301 is installed at the location of the thumb, and a second switch 402 is installed at the location of the index finger.

[0079] The first and second switches 302 and 402 of the plasma torch as described above will be described in detail below.

[0080] When the operator holds the plasma torch handle 700 and adopts a downward viewing posture, the first switch 301, installed on the upper cover 300 of the handle 700, is pressed downwards, and the second switch 402, installed on the lower cover 400 of the handle 700, is pressed upwards. That is, when a right-handed operator holds the handle 700 and adopts a downward viewing posture, the first switch 301 is located on the upper side of the handle 700, and the second switch 402 is located on the lower side of the handle 700, so that the first switch 301 can be operated with the right thumb, and the second switch 402 can be operated with the right index finger.

[0081] That is, in the operation of the first switch 301 and the second switch 402 formed on the upper cover 300 and the lower cover 400 of the handle 700, it is possible to switch the ON / OFF mode of the first and second switches. When the operator applies pressure, it becomes the ON mode, and when the pressure is released, it becomes the OFF mode.

[0082] At this time, in order for the plasma torch to work, it can only work when the first switch 301 is in the ON mode and the second switch 402 is also switched to the ON mode.

[0083] If the first switch 301 is in the off mode, the plasma torch will not work even if the second switch 402 is in the on mode. The plasma torch will also not work when both the first switch 301 and the second switch 402 are in the off mode.

[0084] Here, plasma torch operation means that it can only operate when the first switch 301 is in the ON mode and the second switch 402 is switched to the ON mode.

[0085] That is, by using a dual-switch configuration, even if the first switch 301 is in the ON mode, the plasma torch will not work unless the second switch 402 is switched to the ON mode. This effectively prevents safety accidents caused by misoperation of the switch in the case of a plasma torch consisting of only one switch.

[0086] on the one hand, Figure 9The wiring diagram of the first and second switches of the plasma torch involved in this invention is shown in the wiring diagram. The first switch 301 and the second switch 402 are connected in series. Current is supplied only when both the first switch 301 and the second switch 402 meet the on-mode, so that the plasma torch can work.

[0087] This invention relates to a handle for a plasma torch, and more specifically, to a handle for a plasma torch that allows the torch head to rotate to the left or right at a certain angle and allows the torch head to be pulled out or inserted into the handle by a certain length, thereby enabling the operator to use the plasma torch simply and conveniently, and preventing safety accidents through a dual-switch system.

Claims

1. A handle for a plasma torch, characterized in that, The handle (700) of the plasma torch includes: The top cover (300) has a first and second power rails (308, 309) and a first and second power contact portions (303, 304) that respectively contact the two electrodes (205, 206) formed on the upper part of the insulating cover (200) and maintain an electrical insulation state, and a first space portion (306) inserted into the upper part of the insulating cover (200). The top cover (300) has a first switch (302) that contacts the first and second power contact portions (303, 304) and turns on / off. The top cover (300) has male thread portions (301, 305) formed at both ends. The lower cover (400) has an interior portion forming a lower support portion (410, 411) that can move in the front-rear direction of the insulating cover (200) but is restricted from left-right rotation, and third and fourth power contact portions (403, 404), as well as a second space portion (406) that is inserted into the lower part of the insulating cover (200). Externally, a second switch (402) is formed that contacts the third and fourth power contact portions (403, 404) and is switched on / off. Male thread portions (401, 405) are formed at both ends of the switch. Front and rear nuts (500, 600) are used to fasten the male threaded portion (301, 305, 401, 405) of the upper and lower covers (300, 400). The upper support portion (310, 311) and the lower support portion (410, 411) of the insulating cover are respectively formed inside the first space portion (306) and the second space portion (406), thereby restricting the rotation of the insulating cover (200) inserted into the upper cover (300) and the lower cover (400). The front of the insulating cover (200) has an elongated groove (201) for inserting a locking pin (102) into the welding torch head (100). The upper rear part has upper support claws (202, 203) that are spaced apart to both sides and can move in front and behind the insulating cover (200) but are restricted from left and right rotation. Two electrodes (205, 206) are formed at positions corresponding to the first and second power rails (308, 309) and maintain contact even when the insulating cover (200) moves in front and behind. The lower part has a lower support claw (204) that is spaced apart to both sides and can move in front and behind the insulating cover (200) but is restricted from left and right rotation. The insertion rod (107) of the welding torch head (100) connected to the insulating cover (200) has a crimping ring (101), a groove (103) for inserting into the insulator (104), and a locking pin (102) for inserting into the long groove (201). The crimping ring (101) is inserted into the insulating cover (200) to maintain airtightness and allow the welding torch head (100) to be adjusted to any angle. Using the insertion rod (107) inserted into the insulating cover (200) as a reference, it can be rotated at any angle within the long groove (201) and then maintained at that angle. After the groove (103) is inserted into the insulator (104), the insertion rod (107) is inserted into the inner circumferential surface of the insulating cover (200) in close contact.

2. The handle of the plasma torch according to claim 1, characterized in that, The upper part of the locking pin (102) has a drive groove (113) and the lower part has a locking member (102'). The insertion rod (107) for mounting the locking pin (102) has a sliding hole (112) for the locking pin to move. The lower part of the sliding hole (112) has a locking hole (112') for the locking member (102') to move up and down, and a space (110) for accommodating the locking member (102') and the first spring (109) is formed.

3. The handle of the plasma torch according to claim 2, characterized in that, The second switch (402) consists of the third and fourth power contact parts (403, 404), the baffle (413), and the second spring (412). When the button integrally formed with the baffle (413) is pressed or the pressure is released, the baffle (413) disengages from or inserts between the third and fourth power contact parts (403, 404), so that the third and fourth power contact parts (403, 404) are in contact with each other or not in contact.

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