KR102595076B1 - Handle of Plasma Torch - Google Patents

Abstract

The present invention relates to a handle of a plasma torch. More specifically, the torch head can be rotated at a certain angle to the left or right, and the torch head can be pulled out or inserted at a certain length from the handle, making it easier for the operator to use the plasma torch. This relates to a plasma torch handle that is not only convenient to use, but also prevents safety accidents by converting the switch into a double switch.

Description

Handle of Plasma Torch

The present invention relates to a plasma torch handle. In particular, when the plasma torch handle is placed on the floor or mounted on an object for inspection or rest, the switch is interfered with by other structures or objects to prevent an error in which the plasma torch handle continues to operate. , the torch head can be rotated to the left or right at a certain angle, and the torch head can be withdrawn or inserted at a certain length from the handle to improve operator convenience and prevent safety accidents.

Plasma cutting systems generate plasma from a high temperature ionized gas to cut metal or other electrically conductive materials. Typically, an electric arc converts a gas (eg, compressed air) into a plasma, which is hot enough to melt the workpiece while the pressure of the gas blows the molten metal away. An electric arc is initiated in a plasma torch, through which gas flows.

Plasma torches are used to direct and control plasma for cutting. When the tip of the plasma torch is pulled across the workpiece, the hot plasma cuts the workpiece along this path of the tip of the plasma torch.

Meanwhile, Public Utility Model Publication No. 20-1999-0015094 discloses “Handle structure of a welding torch,” and Figure 1 shows a perspective view showing the separated state of the handle structure of a conventional welding torch.

As shown in Figure 1, the handle structure of a conventional welding torch is provided with male thread parts 11 and 21 at both ends, and insertion grooves 12 and 22 for inserting the support body 2 of the torch head H therein. ) and a pair of handles (10) (20) that are divided into two halves and have an installation space (13) (23); front and rear fastening caps 30 and 40 that are fastened to the male threaded portions 11 and 21 of the handle 10 and 20 to couple the handle 10 and 20; Switch mounting space parts 50 and 60, which are formed by protruding the upper edges of the handles 10 and 20 and have button exposure grooves 51 and 61 on one side; Insulating plates (70) (80) formed integrally with the handle (10) (20) at the bottom of the switch mounting space (50) (60); It is formed in the insertion grooves (12) (22) of the handle (10) (20) and is composed of a plurality of support grooves (90) (100) respectively coupled to be fitted and coupled to the support protrusion (2') of the support body (2). there is.

However, the handle structure of this conventional welding torch is not designed to allow the torch head to rotate to the left or right, so when cutting a steel plate while it is inclined to the right or left, the operator's posture or wrist must be tilted to the right or left. There was the inconvenience of having to change and cut.

In addition, there was a problem in that the length of the torch head could not be adjusted according to the work situation because it was not equipped with a length adjustment function to tension or contract the torch head from the handle.

Republic of Korea Public Utility Model Publication No. 20-1999-0015094 (published on May 15, 1999)

The present invention is intended to solve the problems described above. The purpose of the present invention is to enable the torch head to be rotated to the left or right at a certain angle, to be able to withdraw or insert the torch head from the handle at a certain length, and to provide a double switch. Another purpose is to prevent safety accidents by installing .

In order to achieve the above object, the present invention is a device in which male thread parts (301, 401, 305, 405) are formed at both ends, and a cylindrical insulating cover (200) into which the insertion rod (107) of the torch head is inserted is installed. It consists of a pair of upper and lower covers (300, 400) divided to provide first and second space parts (306, 406), and front and rear nuts (500, 600) are attached to the upper and lower covers (300, 400). In the handle of the plasma torch that is fastened to the male thread portions (301, 401, 305, 405) to form a handle (700);
The two insulating cover upper supports (310, 311) protruding in the longitudinal direction inside are configured to support the insulating cover (200) moving forward and backward, and are located between the two insulating cover upper supports (310, 311) in the longitudinal direction. The first and second power guide rails (308, 309) are electrically connected to the first and second power contact parts (303, 304) formed inside, and the first and second power guide rails (308, 309) are connected to the outside. an upper cover 300 configured to be electrically connected to the first switch 302 protruding from;
The two inner, longitudinally protruding insulating cover lower supports (410, 411) are configured to support the insulating cover (200) moving forward and backward, and the third and fourth power contact portions (403, 404) formed inside are A lower cover ( 400) and;
A long groove 201 is formed in the front so that the lock pin 102 formed on the insertion rod 107 of the torch head can be rotated left and right, and the upper support jaw 202 and the lower support are formed on the outer peripheral surface of the insulating cover 200. The jaw 204 is configured to be inserted between the two insulating cover upper supports 310 and 311 or the two insulating cover lower supports 410 and 411, and two electrodes 205 and 206 are formed at the rear. It is characterized in that it includes a cylindrical insulating cover 200 configured to contact the first and second power guide rails 308 and 309, respectively.
In addition, a slide hole 112 where the lock pin 102 is installed is formed in the insertion rod 107 of the torch head, and a latch 102 and a spring 109 are accommodated in the lower part of the slide hole 112. A space 110 is formed;
A latch hole into which the latch 102 is inserted is formed on the upper surface of the space 110, a spring 109 is installed in the lower part of the latch 102, and a driver groove is located on the upper end of the lock pin 102. 113) is formed and a catch 102 is formed at the lower part.
And, one end of the third power contact portion 403 and one end of the fourth power contact portion 404 are configured to elastically contact, and one end of the third power contact portion 403 and the fourth power contact portion ( A blocking plate 413 is configured to be insertable or removable between one end of the 404), and a spring 412 is formed on one side of the blocking plate 413;
When the button of the second switch 402 is pressed, the blocking plate 413 formed on one side of the second switch is removed between the third power contact part 403 and the fourth power contact part 404, and the third power contact part 404 is removed. When (403) and the fourth power contact portion 404 are brought into contact with each other and the pressing force of the button of the second switch 402 is removed, the blocking plate 413 is connected to the third power contact portion due to the restoring force of the spring 412. It is inserted between the 403 and the fourth power contact portion 404, and is configured to space the third power contact portion 403 and the fourth power contact portion 404 from each other.

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As described above, the present invention relates to the handle 700 of a plasma torch, which allows the torch head to be rotated at a certain angle to the left or right, and the torch head can be pulled out or inserted at a certain length from the handle 700, Not only can workers use the plasma torch easily and conveniently, but it also has the effect of preventing safety accidents by duplicating the switch.

Figure 1 is a perspective view of the handle structure of a conventional plasma torch.
Figure 2 is an assembled perspective view of the handle of the plasma torch of the present invention.
Figure 3 is an exploded perspective view of the handle of the plasma torch of the present invention.
Figure 4 is an enlarged exploded perspective view of the torch head of the present invention.
Figure 5 is a cross-sectional perspective view showing the locking and unlocking states of the lock pin of the present invention.
Figure 6 is a perspective view showing the inside of the upper cover and lower cover of the present invention.
Figure 7 is a perspective view showing before and after operation of the second switch of the present invention.
Figure 8 is a cross-sectional view showing the rear of the handle of the present invention.
Figure 9 is a circuit diagram of the first and second switches of the present invention.

The purpose, features and advantages of the present invention described above will become clearer through the following detailed description. Hereinafter, a preferred embodiment of the present invention will be described based on the attached drawings.

Figure 2 is a handle 700 of a plasma torch according to an embodiment of the present invention. As shown, a torch head 100 is formed at the front and a pair of upper and lower covers 300 and 400 are formed at the rear. A handle 700 fastened with nuts 500 and 600 is disclosed.

That is, the handle 700 of the plasma land of the present invention has the structure of the handle 700 by combining the upper cover 300 and the lower cover 400.

In addition, as shown in FIGS. 3 and 6, the inside of the upper cover 300 includes the first and second power guide rails (308 and 309) and the first and second power contact parts (303 and 304) and a hollow cylindrical insulating structure. A first space 306 is formed into which the upper part of the cover 200 is inserted, a first switch 302 is formed on the outside, and male thread parts 301 and 305 are formed at both ends.

And inside the lower cover 400, there are insulating cover lower supports 410, 411, third and fourth power contact parts 403, 404, and a second space part 406 into which the lower part of the insulating cover 200 is inserted. A second switch 402 is formed on the outside, and male thread parts 401 and 405 are formed at both ends.

In addition, front and rear nuts (500, 600), and an O-ring 501 may be included inside the front nut 500.

Here, the handle of the plasma torch is combined with the upper cover 300 and lower cover 400 of the handle 700 to the hollow cylindrical insulating cover 201, and then the front nut 500 with an O-ring 501 inside. It is fastened to the front male threads (301, 401) of the upper and lower covers (300, 400) of the handle (700), and the rear nut (600) is connected to the rear male threads of the upper and lower covers (300, 400) of the handle (700). By fastening to the parts 305 and 405, the combination of the plasma torch handle is completed.

At this time, before combining the upper and lower covers 300 and 400, it is natural that the hollow cylindrical insulating cover 200 is inserted into the upper and lower covers 300 and 400.

In addition, a long groove 201 into which the lock pin 102 is inserted is formed at the front of the hollow cylindrical insulating cover 200, and at the rear there are upper support jaws 202 and 203 spaced on both sides and two electrodes 205 and 206. ) is formed at the upper part, and two lower support jaws 204 spaced apart on both sides are formed at the lower part.

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 guide rails 308 and 309 of the upper cover 300, respectively, to form an insulating cover ( Even if 200 is moved forward and backward, the two electrodes 205 and 206 and the first and second power guide rails 308 and 309 remain in contact, respectively.

That is, the hollow cylindrical insulating cover 200 is inserted and coupled to the inside of the upper and lower covers 300 and 400, and then the insulating cover 200 inside the handle 700 is moved forward and backward, thereby insulating the torch head. Even if the length is variable, the two electrodes 205 and 206 formed on the top of the insulating cover 200 are in contact with the first and second power guide rails 308 and 309, respectively, to maintain an electrical connection.

Additionally, the insulating cover 200 is coupled to the insertion rod 107 of the torch head 100 before being inserted into the upper and lower covers 300 and 400.

Here, a compression ring 101, a groove 103 into which the insulator 104 is inserted, and a lock pin 102 inserted into the long groove 201 are formed on the insertion rod 107 formed on one side of the torch head 100. However, the compression ring 101 not only maintains airtightness between the insertion rod 107 by inserting it into the insulating cover 200, but also holds the handle 700 with the left hand while holding the torch head 100 with the left hand. The torch head 100 can be adjusted to any angle by rotating it to the center or to the right, and by rotating the insertion rod 107 inserted into the insulating cover 200 to an arbitrary angle and then removing the rotational force of the right hand, the torch head 100 can be adjusted to any angle. The insertion rod 107 no longer rotates and maintains a random rotated angle.

At this time, a gas supply pipe (or power transmission line) and a power line are installed on the upper and lower sides of the groove 103, and the insulator 104 is inserted into the groove 103 and then to the inner peripheral surface of the insulating cover 201. It is natural that the insertion rod 107 must be tightly inserted.

In addition, the long groove 201 is formed to be long from side to side along the rotation direction of the insulating cover 200, and a semicircular seating groove is formed at the center of the left end and the right end so that the locking member is seated. Therefore, when the torch head is rotated so that the locking member of the insertion rod is located in the center of the long groove 201 and the torch head is pulled forward, the locking member is seated in the seating groove and the torch head no longer rotates to the left or right. and is fixed in the central position.

As shown in Figures 6 and 8, insulating cover upper supports 310 and 311 and insulating cover lower supports 410 and 411 are formed inside the space portions 306 and 406 of the upper and lower covers, respectively, to form the upper and lower covers. The rotation of the insulating cover 200 inserted into the lower cover is restricted.

That is, the upper and lower support jaws 202, 203, and 204 of the insulating cover 200 are supported on the insulating cover, and the lower supports 310, 311, 410, and 411 are supported toward the insulating cover 200 from the upper and lower sides, respectively. By doing so, the insulating cover 200 inserted into the upper and lower covers can be moved forward and backward and left and right rotation is limited.

Figure 5 is a view showing before (a) and after (b) the operation of the lock pin 102 installed on the insertion rod 107, and as shown, the lock pin 102 has a driver groove 113 at the top. ) is formed and a catch 102' is formed at the lower part, and a slide hole 112 is formed on the insertion rod 107 where the lock pin 102 is installed to guide the up and down movement of the lock pin 102, A latch hole (not shown) through which the latch 102' moves up and down is formed at the bottom of the slide hole 112, and a space 110 for accommodating the latch 102' and the spring 109 is formed.

Here, the insertion rod 107 is connected by force fitting it into the insulating cover 200. At this time, the lock pin 102 must not protrude outside the outer circumference of the insertion rod 107, and the insertion rod 107 must be insulated. After they are inserted into the cover 200 and their connection is completed, the insertion rod 107 is inserted into the insulating cover 200 by protruding the locking member 102 into the long groove 201 of the insulating cover 200. and connection is completed, and after the lock pin 102 is inserted and protruded into the long groove 201, the insulating cover 200 is inserted into the upper and lower covers 300 and 400 to secure the front and rear nuts 500 and 600. ), and then, with the nozzle team of the torch head positioned downward, fix the handle 700 with your left hand and move the torch head formed integrally with the insertion rod 107 to the left, center, or right with your right hand. It becomes possible to move a certain section (section where the long groove is formed), and the insertion rod 107 can no longer be removed from the insulating cover 200.

That is, when inserting the insertion rod 107 into the insulating cover 200, first, press the lock pin 102 with a driver and rotate it halfway to the right (or left) to secure the locking protrusion 111 of the space 110. ), and then insert the insertion rod 107 into the insulating cover 200. After insertion of the insertion rod 107 into the insulating cover 201 is completed, the locking member 102 enters the groove. When positioned so that it can be inserted into (201), the latch 102' is unlatched from the latch 111 of the space 110 by semi-rotating it to the left (or right) with a driver and the locking member 102 is released. The insulating cover 200 that protrudes into the long groove 201 and is inserted into the insertion rod 107 can no longer be removed.

Figure 7 is a view showing before (a) and after (b) the operation of the second switch 402 of the lower cover 400, and the second switch 402 includes third and fourth power contact parts 403 and 404. ), a blocking plate 413, and a spring 411, and when the button formed integrally with the blocking plate 413 is pressed from the bottom to the top or the pressing force is removed, the blocking plate 413 connects to the third and fourth power contacts. By being removed or inserted between the parts 403 and 404, the third and fourth power contact parts 403 and 404 are brought into contact with each other or are prevented from contacting each other.

That is, when the second switch 402 is pressed from the bottom to the top, the blocking plate 413 leaves between the third and fourth power contact parts 403 and 404, thereby causing the third and fourth power contact parts 403, 404 are in contact with each other by elastic force to maintain the electrical ON state, and when the pressing force of the second switch 402 is removed, the blocking plate 413 is connected to the third and fourth power contact portions 403 and 404. ), the third and fourth power contact parts 403 and 404 are spaced apart to achieve an electrical OFF state.

Figure 8 is a cut-away cross-sectional view showing the insulating cover 200 inserted into the upper and lower covers 300 and 400, and protrusions and grooves are formed on the lower left and right sides of the insulating cover 200, respectively.

Here, the electric wire 207 is inserted into the left and right grooves, respectively, and the inserted electric wire 207 is restricted from leaving the groove.

Looking at their operational relationship with reference to the electrical circuits of the first and second switches 302 and 402 shown in FIG. 9, while the operator is holding the handle 700, the second switch located outside the upper cover of the handle 700 If switch 1 and the second switch located outside the lower cover of the handle 700 are pressed simultaneously, the plasma torch operates while maintaining the electrically ON state.

That is, the plasma torch includes a handle 700 held by the operator, a torch head 100 extending in front of the handle 700, a nozzle tip 108 formed in front of the torch head 100, and a torch head ( It is configured to include an electric wire 207 extending to the rear of 100), and the first switch 301 is installed at the area where the thumb is located when the worker holds the handle 700, and the area where the index finger is located. Installed in is the second switch 402.

Below, the first and second switches 302 and 402 of the plasma torch configured as described above will be described in detail.

When the worker takes the downward-looking posture while holding the handle 700 of the plasma torch, the first switch 301 installed on the upper cover 300 of the handle 700 is installed to press downward, and the handle 700 ) The second switch 402 installed on the lower cover 400 is installed to press upward. That is, when a right-handed worker takes a downward-looking posture while holding the handle 700, 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. Positioned so that the first switch 301 can be operated with the thumb of the right hand, the second switch 402 can be operated with the index finger.

That is, in the operation of the first switch 301 and the second switch 402 formed on the upper cover 300 and lower cover 400 of the handle 700, the first and second switches are ON/OFF. (OFF) mode switching is possible, and when the operator pressurizes them, they become ON mode, and when the pressure is released, they become OFF mode.

At this time, in order for the plasma torch to operate, it can only be operated when the first switch 301 is in the on mode and the second switch 402 is also switched to the on mode.

If the first switch 301 is in off mode, the plasma torch does not operate even if the second switch 402 is in on mode, and the first switch 301 is in off mode and the second switch 402 is also in off mode. Even in this mode, the plasma torch does not work.

Here, the plasma torch operates only when the first switch 301 is in the on mode and the second switch 402 is also switched to the on mode.

In other words, by configuring a double switch so that the plasma torch does not operate even if the first switch 301 is in the on mode unless the second switch 402 is switched to the on mode, the plasma torch consisting of only one switch This has the effect of preventing safety accidents that occur when the switch is operated by mistake.

Meanwhile, Figure 9 is a wiring diagram of the first and second switches of the plasma torch according to the present invention. As shown in the wiring diagram, the first switch 301 and the second switch 402 are connected in series, and the first switch 301 and the second switch 402 are connected in series. Only when both the switch 301 and the second switch 402 satisfy the on mode, current is supplied to enable operation of the plasma torch.

The present invention relates to a handle of a plasma torch. More specifically, the torch head can be rotated at a certain angle to the left or right, and the torch head can be pulled out or inserted at a certain length from the handle, making it easier for the operator to use the plasma torch. This relates to a plasma torch handle that is not only convenient to use, but also prevents safety accidents by converting the switch into a double switch.

100: torch head 101: compression ring
102: Lock pin 103: Groove part
104: Insulator 105: Gas supply pipe (power transmission line)
106: power line 107: insertion rod
108: nozzle tip 200: insulating cover
201: Jang groove 202: Upper support jaw
203: upper support jaw 204: lower support jaw
205: electrode 206: electrode
207: wire 300: upper cover
301: male thread 302: first switch
303: first power contact portion 304: second power contact portion
305: male screw part 306: first space part
310: Insulating cover upper support 311: Insulating cover upper support
400: Lower cover 401: Male thread part
402: 2nd switch 403: 3rd power contact part
404: Fourth power contact part 405: Male thread part
406: second space part 407: first convex part
408: second convex portion 409: third convex portion
410: Insulating cover lower support 411: Insulating cover lower support
412: spring 413: blocking plate
500 ; Front nut 501: O-ring
600: Rear nut 700: Handle

Claims (3)

First and second space parts (306, 406) in which male thread parts (301, 401, 305, 405) are formed at both ends, and a cylindrical insulating cover (200) into which the torch head insertion rod (107) is inserted is installed. It consists of a pair of upper and lower covers (300, 400) divided so as to be provided, and the front and rear nuts (500, 600) are connected to the male thread parts (301, 401, 305, 405) in the handle of the plasma torch that forms the handle 700;
The two insulating cover upper supports (310, 311) protruding in the longitudinal direction inside are configured to support the insulating cover (200) moving forward and backward, and are located between the two insulating cover upper supports (310, 311) in the longitudinal direction. The first and second power guide rails (308, 309) are electrically connected to the first and second power contact parts (303, 304) formed inside, and the first and second power guide rails (308, 309) are connected to the outside. an upper cover 300 configured to be electrically connected to the first switch 302 protruding from;
The two inner, longitudinally protruding insulating cover lower supports (410, 411) are configured to support the insulating cover (200) moving forward and backward, and the third and fourth power contact portions (403, 404) formed inside are A lower cover ( 400) and;
A long groove 201 is formed in the front so that the lock pin 102 formed on the insertion rod 107 of the torch head can be rotated left and right, and the upper support jaw 202 and the lower support are formed on the outer peripheral surface of the insulating cover 200. The jaw 204 is configured to be inserted between the two insulating cover upper supports 310 and 311 or the two insulating cover lower supports 410 and 411, and two electrodes 205 and 206 are formed at the rear. A handle of a plasma torch including a cylindrical insulating cover (200) configured to contact the first and second power guide rails (308, 309), respectively. In claim 1,
A slide hole 112 where the lock pin 102 is installed is formed in the insertion rod 107 of the torch head, and a space portion for receiving the latch 102 and spring 109 is formed at the lower part of the slide hole 112. (110) is formed;
A latch hole into which the latch 102 is inserted is formed on the upper surface of the space 110, a spring 109 is installed in the lower part of the latch 102, and a driver groove is located on the upper end of the lock pin 102. A handle of a plasma torch, characterized in that 113) is formed and a latch 102 is formed at the lower part. In claim 2,
One end of the third power contact portion 403 and one end of the fourth power contact portion 404 are configured to elastically contact each other, and one end of the third power contact portion 403 and the fourth power contact portion 404 A blocking plate 413 is configured to be inserted or removed between one end of the, and a spring 412 is formed on one side of the blocking plate 413;
When the button of the second switch 402 is pressed, the blocking plate 413 formed on one side of the second switch is removed between the third power contact part 403 and the fourth power contact part 404, and the third power contact part 404 is removed. When (403) and the fourth power contact portion 404 are brought into contact with each other and the pressing force of the button of the second switch 402 is removed, the blocking plate 413 is connected to the third power contact portion due to the restoring force of the spring 412. A handle of a plasma torch, characterized in that it is inserted between the (403) and the fourth power contact portion (404) and is configured to space the third power contact portion (403) and the fourth power contact portion (404) from each other.

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