Cutting gun protection mechanism of numerical control plasma cutting machine

Abstract

The utility model relates to the field of plasma cutting machine cutting guns, in particular to a numerical control plasma cutting machine cutting gun protection mechanism which comprises a cutting gun body, the outer portion, close to the bottom end, of the cutting gun body is connected with a connector, the bottom end of the cutting gun body is connected with a cutting gun head, and the cutting gun head is sleeved with a heat dissipation mechanism. The heat dissipation mechanism comprises a first protective sleeve and a second protective sleeve, the inner wall of the first protective sleeve and the inner wall of the second protective sleeve are attached to the outer wall of the cutting gun head, heat dissipation cavities are formed in the first protective sleeve and the second protective sleeve correspondingly, and a plurality of heat dissipation fins are connected into the two heat dissipation cavities correspondingly; and the two sides of the outer portions of the multiple heat dissipation fins are in clearance fit with the two sides of the inner wall of the heat dissipation cavity correspondingly, connecting rings are connected to the upper ends of the first protection sleeve and the second protection sleeve correspondingly, the two connecting rings are arranged on the two sides of the outer wall of the connector correspondingly, and heat dissipation protection is effectively conducted on the cutting gun head.

Description

Technical Field

[0001] The present application relates to the field of plasma cutting machine torches, and in particular to a protection mechanism for a CNC plasma cutting machine torch. Background Art

[0002] Plasma is an ionized gas composed of electrons, positive ions, and neutral atoms. Plasma cutting utilizes the heat of a high-temperature plasma arc to partially melt the metal at the workpiece's cut edge. The high-speed plasma's momentum then expels the molten metal, creating a kerf. Plasma cutting is widely used due to its advantages, including high cutting speed, high precision, easy setting of cutting conditions, ease of automation, unmanned operation, and relatively low cost.

[0003] When using an existing plasma cutting machine cutting gun, a protective cover is usually placed on the outside of the cutting gun head to protect the cutting gun head. The setting of the protective cover will prevent the temperature of the cutting gun head from dissipating outward, which may easily cause the cutting gun head to be damaged due to excessive surface temperature and become unusable. Utility Model Content

[0004] In order to solve the problems raised in the above background technology, the present application provides a cutting gun protection mechanism for a CNC plasma cutting machine.

[0005] The above technical objectives of this application are achieved through the following technical solutions:

[0006] A cutting gun protection mechanism for a CNC plasma cutting machine comprises a cutting gun body, wherein the cutting gun body is connected to a connecting head on the outside near the bottom end, the bottom end of the cutting gun body is connected to a cutting gun head, and the outer sleeve of the cutting gun head is provided with a heat dissipation mechanism, wherein the heat dissipation mechanism comprises a first protective sleeve and a second protective sleeve, the inner walls of the first protective sleeve and the second protective sleeve are both in contact with the outer wall of the cutting gun head, and the interiors of the first protective sleeve and the second protective sleeve are both provided with a heat dissipation cavity, the interiors of the two heat dissipation cavities are both connected to a plurality of heat dissipation fins, the outer sides of the plurality of heat dissipation fins are respectively clearance-matched with the inner walls of the heat dissipation cavity, the upper ends of the first protective sleeve and the second protective sleeve are both connected to connecting rings, and the two connecting rings are respectively arranged on both sides of the outer wall of the connecting head.

[0007] By adopting the above scheme, a first protective cover and a second protective cover are provided, and the first protective cover and the second protective cover protect the cutting gun head, and the inner walls of the first protective cover and the second protective cover fit with the outer wall of the cutting gun head. When the surface temperature of the cutting gun head is high, the cutting gun head is protected from heat dissipation by the heat dissipation fins, thereby avoiding damage to the cutting gun head due to the high surface temperature of the cutting gun head. By opening a heat dissipation cavity inside the first protective cover and the second protective cover, it is convenient to install the heat dissipation fins. Through the coordinated use of the connecting ring and the connecting head, when the first protective cover and the second protective cover are connected and fixed, the two connecting rings fit together. When the connecting head and the connecting ring are snap-fitted and installed to achieve connection, the stability of the first protective cover and the second protective cover in the process of protecting the cutting gun head is achieved.

[0008] Furthermore, three square grooves are provided on the inner walls of the first protective cover and the second protective cover near the upper end, a connecting pipe is connected to the front of the first protective cover near the upper end, a cooling fan is provided inside the connecting pipe, and a plurality of air outlets are provided on the outside of the first protective cover and the second protective cover near the bottom end.

[0009] By adopting the above solution, a cooling fan is arranged inside the connecting pipe. When the cooling fan is started, air will first enter the heat dissipation cavity of the first protective cover through the connecting pipe, and flow to the heat dissipation cavity of the second protective cover through the upper part, thereby dissipating heat to the heat dissipation fins and improving the heat dissipation efficiency of the heat dissipation fins. At the same time, the air will also contact the surface of the cutting gun head near the upper end through the square groove, further improving the heat dissipation efficiency of the cutting gun head, and then the air will be discharged from the first protective cover and the second protective cover respectively through the air outlets, and several air outlets are respectively located between the two heat dissipation fins.

[0010] Furthermore, one end of the connecting pipe is externally threadedly connected to a dust cover, and a filter is provided inside the dust cover.

[0011] By adopting the above solution, a filter is set inside the dust cover to prevent dust from entering the inside of the connecting pipe and being adsorbed on the cooling fan during air circulation, thereby affecting the air circulation. The dust cover is connected to the outside of one end of the connecting pipe with external threads, so that the dust cover can be easily removed and the filter can be cleaned.

[0012] Furthermore, the inner walls of the two connecting rings are connected to limit bars, and the outer wall of the connecting head is provided with a plurality of limit grooves. The plurality of limit bars are located inside the limit grooves and are slidably connected to the limit grooves, and the upper ends of the plurality of limit bars and the inner upper ends of the limit grooves are connected to strong magnets, and a pair of the strong magnets are magnetically attracted to each other.

[0013] By adopting the above scheme, through the coordinated use of the limit bar and the limit groove, when the limit bar and the limit groove are aligned in sequence and pushed upward, the limit bar is pushed to the inside of the limit groove, so that the strong magnet at the upper end of the limit bar is attracted to the strong magnet at the upper end of the limit groove, thereby achieving the fixation of the connecting head and the connecting ring.

[0014] Furthermore, the exterior of the first protective cover and the second protective cover are made of ceramic material, and the inner walls of the first protective cover and the second protective cover are made of copper material.

[0015] By adopting the above solution, the outer parts of the first protective cover and the second protective cover are set to ceramic material to protect the cutting gun head from wear and corrosion. At the same time, the inner parts of the first protective cover and the second protective cover in contact with the outer wall of the cutting gun head are set to copper material to improve the thermal conductivity.

[0016] Furthermore, connecting mechanisms are provided on both sides of the outside between the first protective cover and the second protective cover, and the connecting mechanisms include a mounting bar and a fixing seat. The outer side of the mounting bar is connected to the second protective cover, and the outer side of the fixing seat is connected to the first protective cover. A pair of plug-ins are connected to the front of the mounting bar, and the ends of the pair of plug-ins away from the mounting bar extend through the fixing seat to the inside, and both are gap-matched with the through holes of the fixing seat.

[0017] By adopting the above solution and setting up a connecting mechanism, the first protective cover and the second protective cover can be easily detached, thereby facilitating replacement of the first protective cover or the second protective cover as needed. When a pair of plug-in blocks on the front of the mounting bar are inserted into the interior of the fixing seat, the mounting bar and the fixing seat are connected.

[0018] Furthermore, the front of the fixing seat is connected to the power box, and a pair of slides are slidably provided between the fixing seat and the power box. The opposite sides of the pair of slides are connected to the insertion rods, and the opposite ends of the two insertion rods pass through the insertion block and extend to the outside, and are both gap-matched with the through-holes of the insertion block, and the opposite ends of the two insertion rods are respectively against the internal upper end and bottom end of the fixing seat.

[0019] By adopting the above solution, through the coordinated use of the insertion rod and the insertion block, when the two slides drive the insertion rod to move toward both sides respectively, one end of the insertion rod passes through the through hole of the insertion block and then abuts against the inner wall of the fixing seat, limiting and fixing the insertion block in the fixing seat, thereby completing the connection between the first protective cover and the second protective cover.

[0020] Furthermore, a slide groove is opened on one side of the inner wall of the fixed seat, and a bidirectional screw rod is rotatably connected to the inside of the power box. The two ends of the bidirectional screw rod respectively pass through a pair of slides and extend to the outside, and are respectively threadedly connected to the pair of slides. The ends of the pair of slides away from the bidirectional screw rod extend to the inside of the slide groove and are slidably connected to the slide groove.

[0021] By adopting the above scheme, a bidirectional screw is set up. Since the external threads at both ends of the bidirectional screw are opposite, when the bidirectional screw rotates, a pair of slides connected by the external threads at both ends can achieve opposite linear movement under the sliding limit action of the slide groove.

[0022] Furthermore, a worm wheel is provided on the outside of the bidirectional screw, and the worm wheel is connected to a worm. Both ends of the worm are connected to the inner wall of the power box through bearings, and one end of the worm extends through the power box to the outside and is provided with a knob.

[0023] By adopting the above solution and providing a knob, when the knob is turned, the worm is easily rotated, thereby driving the rotation of the worm wheel meshing with the worm, and causing the bidirectional screw to rotate.

[0024] In summary, this application has the following technical effects:

[0025] By arranging a first protective cover and a second protective cover, the first protective cover and the second protective cover protect the cutting gun head, and the inner walls of the first protective cover and the second protective cover fit with the outer wall of the cutting gun head. When the surface temperature of the cutting gun head is high, the cutting gun head is protected from heat dissipation by the heat dissipation fins, thereby avoiding damage to the cutting gun head due to the high surface temperature of the cutting gun head. By opening a heat dissipation cavity inside the first protective cover and the second protective cover, it is convenient to install the heat dissipation fins. By arranging a heat dissipation fan inside the connecting pipe, when the heat dissipation fan is started, air will first enter the interior of the heat dissipation cavity of the first protective cover through the connecting pipe, and flow to the interior of the heat dissipation cavity of the second protective cover through the upper part. The heat dissipation of the heat sink is improved by the heat dissipation fins, and the air will contact the surface of the cutting gun head near the upper end through the square groove, further improving the heat dissipation efficiency of the cutting gun head. The air is then discharged from the first protective cover and the second protective cover through the air outlet. When the first protective cover and the second protective cover are connected and fixed, the two connecting rings fit together. When the connecting head and the connecting ring are snapped and installed to achieve connection, the stability of the first protective cover and the second protective cover in the process of protecting the cutting gun head is achieved. The utility model can effectively provide heat dissipation protection for the cutting gun head, avoid damage to the cutting gun head caused by high surface temperature of the cutting gun head, and has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the appearance structure diagram of this application;

[0027] Figure 2 This is a schematic diagram of the three-dimensional expanded structure of the heat dissipation mechanism of the cutting gun head of the present application;

[0028] Figure 3 is a schematic diagram of the three-dimensional structure of the second protective cover of the present application;

[0029] Figure 4 is a cross-sectional view of the first protective cover of the present application;

[0030] Figure 5 It is a side sectional view of the fixing seat of the present application.

[0031] In the figure, 100, cutting gun body; 1001, connecting head; 1002, limiting groove; 1003, cutting gun head; 200, heat dissipation mechanism; 2001, connecting ring; 2002, first protective cover; 2003, second protective cover; 2004, heat dissipation cavity; 2005, heat dissipation fins; 2006, square groove; 2007, connecting pipe; 2008, dust cover; 2009, filter; 2010, air outlet; 300, connecting mechanism; 3001, mounting strip; 3002, fixing seat; 3003, plug block; 3004, power box; 3005, slide groove; 3006, slide plate; 3007, plug rod; 3008, two-way screw; 3009, worm gear; 3010, worm; 3011, knob. DETAILED DESCRIPTION

[0032] The present application is further described in detail below with reference to the accompanying drawings.

[0033] Example:

[0034] As attached Figure 1 To the attached Figure 5 As shown:

[0035] The utility model provides a cutting gun protection mechanism for a numerically controlled plasma cutting machine, comprising a cutting gun body 100, wherein the cutting gun body 100 is connected to a connector 1001 on the outside near the bottom end, a cutting gun head 1003 is connected to the bottom end of the cutting gun body 100, and a heat dissipation mechanism 200 is provided on the outside of the cutting gun head 1003. The heat dissipation mechanism 200 comprises a first protective sleeve 2002 and a second protective sleeve 2003, and the inner walls of the first protective sleeve 2002 and the second protective sleeve 2003 are both in contact with the outer wall of the cutting gun head 1003. The first protective cover 2002 and the second protective cover 2003 are fitted together, and a heat dissipation cavity 2004 is provided inside each of the first protective cover 2002 and the second protective cover 2003. A plurality of heat dissipation fins 2005 are connected to the interior of each of the two heat dissipation cavities 2004. The outer sides of the plurality of heat dissipation fins 2005 are respectively fitted with clearances on both sides of the inner wall of the heat dissipation cavity 2004. The upper ends of the first protective cover 2002 and the second protective cover 2003 are respectively connected with connecting rings 2001. The two connecting rings 2001 are respectively provided on both sides of the outer wall of the connector 1001. By providing the first protective cover 2 002 and the second protective cover 2003, the first protective cover 2002 and the second protective cover 2003 protect the cutting gun head 1003, and the inner walls of the first protective cover 2002 and the second protective cover 2003 fit the outer wall of the cutting gun head 1003. When the surface temperature of the cutting gun head 1003 is high, the heat dissipation fins 2005 are used to protect the cutting gun head 1003 from heat, so as to avoid the cutting gun head 1003 from being damaged due to the high surface temperature of the cutting gun head 1003. 2 and the second protective cover 2003 are provided with a heat dissipation cavity 2004, so as to facilitate the installation of the heat dissipation fins 2005. By using the connecting ring 2001 and the connecting head 1001 in conjunction with each other, when the first protective cover 2002 and the second protective cover 2003 are connected and fixed, the two connecting rings 2001 fit together. When the connecting head 1001 and the connecting ring 2001 are engaged and installed to achieve connection, the stability of the first protective cover 2002 and the second protective cover 2003 in the process of protecting the cutting gun head 1003 is achieved.

[0036] Among them, the inner wall of the first protective cover 2002 and the second protective cover 2003 are both provided with three square grooves 2006 near the upper end. The front of the first protective cover 2002 is connected to a connecting pipe 2007 near the upper end. A cooling fan is provided inside the connecting pipe 2007. The first protective cover 2002 and the second protective cover 2003 are both provided with a plurality of air outlets 2010 on the outside near the bottom. By providing a cooling fan inside the connecting pipe 2007, when the cooling fan is started, air will first enter the heat dissipation cavity 2010 of the first protective cover 2002 through the connecting pipe 2007. 004, and flows through the upper part to the interior of the heat dissipation cavity 2004 of the second protective cover 2003, thereby dissipating heat to the plurality of heat dissipation fins 2005, thereby improving the heat dissipation efficiency of the heat dissipation fins 2005. At the same time, the air will also contact the surface of the cutting gun head 1003 near the upper end through the square groove 2006, further improving the heat dissipation efficiency of the cutting gun head 1003, and then the air will be discharged from the first protective cover 2002 and the second protective cover 2003 respectively through the air outlet 2010, and the plurality of air outlets 2010 are respectively located between the two heat dissipation fins 2005.

[0037] Among them, one end of the connecting pipe 2007 is connected to a dust cover 2008 by an external thread, and a filter 2009 is provided inside the dust cover 2008. By arranging the filter 2009 inside the dust cover 2008, dust is prevented from entering the interior of the connecting pipe 2007 during air circulation and being adsorbed on the cooling fan, thereby affecting the poor air circulation. By connecting the dust cover 2008 to the external thread at one end of the connecting pipe 2007, it is convenient to remove the dust cover 2008 and clean the filter 2009.

[0038] Among them, the inner walls of the two connecting rings 2001 are connected to the limiting strips, and the outer wall of the connecting head 1001 is provided with a number of limiting grooves 1002. The limiting strips are all located inside the limiting grooves 1002 and are all slidably connected to the limiting grooves 1002. The upper ends of the limiting strips and the upper ends of the inner parts of the limiting grooves 1002 are connected with strong magnets. A pair of strong magnets are magnetically attracted to each other. Through the coordinated use of the limiting strips and the limiting grooves 1002, when the limiting strips and the limiting grooves 1002 are aligned in sequence and pushed upward, the limiting strips are pushed to the inside of the limiting grooves 1002, so that the strong magnet on the upper end of the limiting strip is attracted to the strong magnet on the upper end of the inner part of the limiting grooves 1002, thereby achieving the fixation of the connecting head 1001 and the connecting ring 2001.

[0039] Among them, the outer parts of the first protective cover 2002 and the second protective cover 2003 are made of ceramic material, and the inner walls of the first protective cover 2002 and the second protective cover 2003 are made of copper material. By setting the outer parts of the first protective cover 2002 and the second protective cover 2003 to ceramic material, the cutting gun head 1003 is protected from wear and corrosion. At the same time, the inner parts of the first protective cover 2002 and the second protective cover 2003 that are in contact with the outer walls of the cutting gun head 1003 are set to copper material to improve the thermal conductivity.

[0040] Among them, connecting mechanisms 300 are provided on both sides of the outside between the first protective cover 2002 and the second protective cover 2003, and the connecting mechanism 300 includes a mounting bar 3001 and a fixing seat 3002. The outer side of the mounting bar 3001 is connected to the second protective cover 2003, and the outer side of the fixing seat 3002 is connected to the first protective cover 2002. A pair of plug-in blocks 3003 are connected to the front of the mounting bar 3001. The ends of the pair of plug-in blocks 3003 away from the mounting bar 3001 both pass through the fixing seat 3002 and extend to the inside, and both fit with the through-hole gap of the fixing seat 3002. By setting the connecting mechanism 300, the first protective cover 2002 and the second protective cover 2003 are facilitated to be detachable, so that the first protective cover 2002 or the second protective cover 2003 is facilitated to be replaced as needed. When the pair of plug-in blocks 3003 on the front of the mounting bar 3001 are inserted into the fixing seat 3002, the mounting bar 3001 and the fixing seat 3002 are connected.

[0041] The front of the fixing seat 3002 is connected to the power box 3004, and a pair of slides 3006 are slidably provided between the fixing seat 3002 and the power box 3004. The opposite sides of the pair of slides 3006 are connected with insertion rods 3007, and the opposite ends of the two insertion rods 3007 pass through the insertion block 3003 and extend to the outside, and both are gap-matched with the through-holes of the insertion block 3003, and the opposite ends of the two insertion rods 3007 are respectively abutted against the upper and bottom ends of the interior of the fixing seat 3002. Through the cooperation of the insertion rods 3007 and the insertion block 3003, when the two slides 3006 drive the insertion rods 3007 to move toward opposite sides respectively, one end of the insertion rod 3007 passes through the through-hole of the insertion block 3003 and then abuts against the inner wall of the fixing seat 3002, so that the insertion block 3003 is limited and fixed in the fixing seat 3002, thereby completing the connection between the first protective cover 2002 and the second protective cover 2003.

[0042] Among them, a slide groove 3005 is opened on one side of the inner wall of the fixed seat 3002, and the internal rotation of the power box 3004 is connected with a bidirectional screw rod 3008. The two ends of the bidirectional screw rod 3008 respectively pass through a pair of slides 3006 and extend to the outside, and are respectively threadedly connected to the pair of slides 3006. The ends of a pair of slides 3006 away from the bidirectional screw rod 3008 extend to the inside of the slide groove 3005 and are slidingly connected to the slide groove 3005. By setting the bidirectional screw rod 3008, since the external threads at both ends of the bidirectional screw rod 3008 are opposite, when the bidirectional screw rod 3008 rotates, it is convenient for the pair of slides 3006 with their external threads at both ends to realize opposite linear movement under the sliding limit action of the slide groove 3005.

[0043] Among them, the outer sleeve of the bidirectional screw 3008 is provided with a worm wheel 3009, and the worm wheel 3009 is connected to the worm 3010 for transmission. Both ends of the worm 3010 are connected to the inner wall of the power box 3004 through bearings, and one end of the worm 3010 passes through the power box 3004 and extends to the outside, and is sleeved with a knob 3011. By setting the knob 3011, when the knob 3011 is turned, it is easy to realize the rotation of the worm 3010, thereby driving the rotation of the worm wheel 3009 engaged with the worm 3010, so that the bidirectional screw 3008 rotates.

[0044] Specifically, after a pair of plug blocks 3003 on the front of the mounting bar 3001 are inserted into the interior of the fixing seat 3002, the mounting bar 3001 and the fixing seat 3002 are connected. Then, the knob 3011 is turned to rotate the worm 3010, which drives the worm wheel 3009 to rotate, and the bidirectional screw rod 3008 to rotate, so that a pair of slide plates 3006 with external threads at both ends thereof can realize opposite linear movement under the sliding limit of the slide groove 3005. When the two slide plates 3006 drive the insertion rod 3007 to move toward the two sides respectively, one end of the insertion rod 3007 passes through the through hole of the plug block 3003 and then engages with the fixing seat 3002. The inner wall of the fixed seat 3002 is pressed against each other, and the insert block 3003 is limited and fixed in the fixed seat 3002, thereby completing the connection between the first protective cover 2002 and the second protective cover 2003, and then the limiting strip and the limiting groove 1002 are aligned in sequence and pushed upward, and the limiting strip is pushed to the inside of the limiting groove 1002, so that the strong magnet at the upper end of the limiting strip is attracted to the strong magnet at the upper end of the limiting groove 1002, thereby achieving the fixation of the connecting head 1001 and the connecting ring 2001, thereby achieving the stability of the first protective cover 2002 and the second protective cover 2003 in the process of protecting the cutting gun head 1003. By The outer parts of the first protective cover 2002 and the second protective cover 2003 are set to ceramic material to protect the cutting gun head 1003 from wear and corrosion. At the same time, the inner parts of the first protective cover 2002 and the second protective cover 2003 that are in contact with the outer wall of the cutting gun head 1003 are set to copper material to improve the thermal conductivity. When the surface temperature of the cutting gun head 1003 is high, the heat dissipation protection of the cutting gun head 1003 is provided through the heat dissipation fins 2005 to avoid the cutting gun head 1003 being damaged due to the high surface temperature of the cutting gun head 1003. A cooling fan is set inside the connecting pipe 2007. When the cooling fan is started, air will first pass through the connecting pipe 2007. The through pipe 2007 enters the interior of the heat dissipation cavity 2004 of the first protective cover 2002, and flows through the upper part to the interior of the heat dissipation cavity 2004 of the second protective cover 2003, thereby dissipating heat to the multiple heat dissipation fins 2005, thereby improving the heat dissipation efficiency of the heat dissipation fins 2005. At the same time, the air will also contact the surface of the cutting gun head 1003 near the upper end through the square groove 2006, further improving the heat dissipation efficiency of the cutting gun head 1003, and then the air will be discharged from the first protective cover 2002 and the second protective cover 2003 respectively through the air outlet 2010, and the multiple air outlets 2010 are respectively located between the two heat dissipation fins 2005.

[0045] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A CNC plasma cutting machine cutting gun protection mechanism, characterized in that: The invention comprises a cutting gun body (100), wherein the cutting gun body (100) is connected to a connector (1001) on the outside near the bottom end, the bottom end of the cutting gun body (100) is connected to a cutting gun head (1003), the outer sleeve of the cutting gun head (1003) is provided with a heat dissipation mechanism (200), and the heat dissipation mechanism (200) comprises a first protective sleeve (2002) and a second protective sleeve (2003), the inner walls of the first protective sleeve (2002) and the second protective sleeve (2003) are both in contact with the outer wall of the cutting gun head (1003), and the heat dissipation mechanism (200) is provided with a heat dissipation mechanism (200). The first protective cover (2002) and the second protective cover (2003) are both provided with a heat dissipation cavity (2004), the interiors of the two heat dissipation cavities (2004) are both connected with a plurality of heat dissipation fins (2005), the outer sides of the plurality of heat dissipation fins (2005) are respectively fitted with clearances on the inner walls of the heat dissipation cavity (2004), the upper ends of the first protective cover (2002) and the second protective cover (2003) are both connected with connecting rings (2001), and the two connecting rings (2001) are respectively arranged on the outer walls of the connector (1001).

2. A CNC plasma cutting machine torch protection mechanism according to claim 1, characterized in that: The inner walls of the first protective cover (2002) and the second protective cover (2003) are each provided with three square grooves (2006) near the upper end; a connecting pipe (2007) is connected to the front of the first protective cover (2002) near the upper end; a cooling fan is provided inside the connecting pipe (2007); and the first protective cover (2002) and the second protective cover (2003) are each provided with a plurality of air outlets (2010) on the outside near the bottom end.

3. A CNC plasma cutting machine torch protection mechanism according to claim 2, characterized in that: One end of the connecting pipe (2007) is externally threadedly connected to a dust cover (2008), and a filter screen (2009) is provided inside the dust cover (2008).

4. A CNC plasma cutting machine torch protection mechanism according to claim 1, characterized in that: The inner walls of the two connecting rings (2001) are connected to limiting strips, the outer wall of the connecting head (1001) is provided with a plurality of limiting grooves (1002), the plurality of limiting strips are located inside the limiting grooves (1002) and are slidably connected to the limiting grooves (1002), and the upper ends of the plurality of limiting strips and the inner upper ends of the limiting grooves (1002) are connected to strong magnets, and a pair of the strong magnets are magnetically attracted to each other.

5. A CNC plasma cutting machine torch protection mechanism according to claim 4, characterized in that: The exterior of the first protective cover (2002) and the second protective cover (2003) are made of ceramic material, and the interior walls of the first protective cover (2002) and the second protective cover (2003) are made of copper material.

6. A CNC plasma cutting machine torch protection mechanism according to claim 5, characterized in that: Connecting mechanisms (300) are provided on both sides of the exterior of the first protective cover (2002) and the second protective cover (2003), and the connecting mechanism (300) comprises a mounting bar (3001) and a fixing seat (3002), the outer side of the mounting bar (3001) is connected to the second protective cover (2003), and the outer side of the fixing seat (3002) is connected to the first protective cover (2002), and a pair of plugs (3003) are connected to the front of the mounting bar (3001), and the ends of the pair of plugs (3003) away from the mounting bar (3001) both penetrate the fixing seat (3002) and extend to the interior, and both are gap-matched with the through holes of the fixing seat (3002).

7. A CNC plasma cutting machine torch protection mechanism according to claim 6, characterized in that: The front of the fixing seat (3002) is connected to the power box (3004), and a pair of slides (3006) are slidably provided between the fixing seat (3002) and the power box (3004), and the opposite sides of the pair of slides (3006) are connected to the insertion rods (3007), and the opposite ends of the two insertion rods (3007) pass through the insertion block (3003) and extend to the outside, and are both gap-matched with the through holes of the insertion block (3003), and the opposite ends of the two insertion rods (3007) are respectively against the internal upper end and bottom end of the fixing seat (3002).

8. A CNC plasma cutting machine torch protection mechanism according to claim 7, characterized in that: A slide groove (3005) is provided on one side of the inner wall of the fixed seat (3002), and a bidirectional screw rod (3008) is rotatably connected to the inside of the power box (3004). The two ends of the bidirectional screw rod (3008) respectively pass through a pair of slides (3006) and extend to the outside, and are respectively threadedly connected to the pair of slides (3006). The ends of the pair of slides (3006) away from the bidirectional screw rod (3008) both extend to the inside of the slide groove (3005) and are both slidably connected to the slide groove (3005).

9. A CNC plasma cutting machine torch protection mechanism according to claim 8, characterized in that: The bidirectional screw (3008) is externally sleeved with a worm wheel (3009), and the worm wheel (3009) is transmission-connected to a worm (3010), both ends of the worm (3010) are connected to the inner wall of the power box (3004) through bearings, and one end of the worm (3010) passes through the power box (3004) and extends to the outside, and is sleeved with a knob (3011).

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