Rapid gun changing gun rack device of flame cutting machine

Abstract

The utility model belongs to the technical field of steelmaking equipment, and discloses a quick gun changing gun rack device of a flame cutting machine. According to the rapid gun changing gun rack device of the flame cutting machine, the flame cutting machine comprises a flame cutting gun and a gun swinging mechanism which are connected, and the rapid gun changing gun rack device can be detachably connected with the flame cutting gun and the gun swinging mechanism; the device comprises a connecting gun base, a positioning device and a locking device, the connecting gun base is arranged in the vertical direction, the positioning device is detachably connected to the connecting gun base, and the positioning device is coaxially and fixedly arranged under the locking device in a connected mode. The device is designed on the premise that an existing installation mode is guaranteed, the two factors of positioning and adjusting of the cutting gun are considered at the same time, accurate positioning can be achieved, on-site adjusting operation can be facilitated, and rapid switching is achieved.

Description

Technical Field

[0001] This utility model belongs to the technical field of steelmaking equipment, and in particular to a quick-change gun holder device for a flame cutting machine. Background Technology

[0002] With increasing global emphasis on environmental protection and sustainable development, the industrial sector, particularly energy-intensive and high-emission heavy industries such as steel smelting, is facing unprecedented pressure to transform. Energy conservation, emission reduction, and green production have become industry consensus and the future direction of development. Against this backdrop, steel mills, as major energy consumers and carbon emitters, find technological innovation in energy conservation and emission reduction during their production processes particularly important.

[0003] Many steel plants have introduced oxyhydrogen (HHH) cutting projects. The purpose of this project is to use an HHH generator to produce hydrogen, oxygen, or a mixture of these gases to replace pure natural gas for billet cutting, significantly reducing natural gas consumption. Currently, most HHHH cutting projects utilize flame cutting machines. Existing flame cutting machines generally consist of a flame cutting torch and a torch holder. The torch is connected and mounted on the torch holder, and its position can be adjusted via the torch holder, making it convenient to use. However, the flame cutting torch and torch holder are usually fixed together. Changing the torch requires careful consideration of both the torch replacement itself and proper adjustment to ensure it is vertical for subsequent operations. Therefore, changing the torch is currently difficult and time-consuming, reducing production efficiency and increasing the workload for workers.

[0004] Therefore, ensuring the continuous and stable operation of the production line and achieving seamless switching between old and new cutting systems has become an urgent problem to be solved. Traditional cutting torch holders have significant shortcomings in torch changing efficiency and torch position adjustment, and cannot meet the needs of rapid switching. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a quick gun changing device for a flame cutting machine.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A quick-change gun holder device for a flame cutting machine is provided. The flame cutting machine includes a flame cutting gun and a swing gun mechanism connected together. The quick-change gun holder device can be detachably connected to both the flame cutting gun and the swing gun mechanism. The device includes a connecting gun base, a positioning device, and a locking device. The connecting gun base is arranged vertically. The positioning device is detachably connected to the connecting gun base and is coaxially fixedly connected to the locking device directly below it.

[0008] The connecting gun seat comprises a connecting frame, a gun seat and locking bolts, the connecting frame is arranged in the vertical direction, the gun seat is arranged on the connecting frame, and two or more bolt through holes are integrally arranged on one longitudinal side of the connecting frame, and the connecting frame can be detachably fixed with the gun swing mechanism through the bolt through holes and the bolts;

[0009] The gun seat and the locking bolts are arranged in the horizontal direction, and the gun seat is arranged in parallel and spaced apart in the vertical direction, and is coaxially arranged in two parts, one longitudinal side of the gun seat is fixed to the other longitudinal side of the connecting frame, a locking ring connecting through hole 13 is integrally and coaxially arranged in the gun seat, the locking ring connecting through hole is arranged in the vertical direction and extends from the upper surface of the gun seat to the lower surface of the gun seat, the locking ring connecting through hole is matched with the locking ring, and the locking ring is coaxially and detachably connected in the locking ring connecting through hole;

[0010] The gun seat also has a bolt mounting through hole connected thereto, the bolt mounting through hole is arranged in the horizontal direction and extends from one horizontal side of the gun seat to the other horizontal side of the gun seat, the bolt mounting through hole is matched with the locking bolt, the bolt mounting through hole is connected to the locking ring connecting through hole, and the bolt mounting through hole can detachably and threadedly engage the locking bolt;

[0011] The positioning device comprises a positioning ring and a locking ring, both of which are arranged in a hollow cylindrical shape, the locking ring is coaxially connected below the positioning ring, the hollow interiors of the positioning ring and the locking ring are arranged in a cylindrical shape, and the hollow interiors of the positioning ring and the locking ring are connected in series in the vertical direction, the hollow interiors of the positioning ring and the locking ring are matched with the flame cutting gun, and the flame cutting gun can be detachably arranged in the hollow interiors of the positioning ring and the locking ring;

[0012] The locking ring can be detachably connected in the locking ring connecting through hole in the gun seat, the diameter of the positioning ring is greater than that of the locking ring connecting through hole of the gun seat, and the positioning ring can be detachably connected on the upper surface of the gun seat;

[0013] The locking device can be closely and detachably connected with the flame cutting gun, the locking device is coaxially connected with the positioning ring and the locking ring, and the locking device is connected with the positioning ring, so that the locking device can position and lock the flame cutting gun.

[0014] Further, the locking device and the positioning device are combined and welded together;

[0015] The locking device comprises an arc-shaped buckle body, an arc-shaped connecting piece and a clasp tongue, the arc-shaped buckle body, the arc-shaped connecting piece and the clasp tongue are arranged along the horizontal direction, the arc-shaped connecting piece and the arc-shaped buckle body are arranged in an arc shape, the arc-shaped connecting piece and the arc-shaped buckle body are tightly and detachably connected, a flame cutting gun is arranged, one horizontal end of the arc-shaped buckle body is connected with one horizontal end of the arc-shaped connecting piece, the other horizontal end of the arc-shaped buckle body is hingedly connected with one horizontal end of the clasp tongue through a rotating shaft, the other horizontal end of the arc-shaped connecting piece is detachably connected with the other horizontal end of the clasp tongue, the arc-shaped buckle body, the arc-shaped connecting piece and the clasp tongue form a lobster-claw-shaped structure, the flame cutting gun can be tightly and detachably arranged in the structure, the clasp tongue can be closed and opened to lock and release the flame cutting gun, and the arc-shaped buckle body is fixedly connected with the positioning ring of the positioning device.

[0016] Further, the locking device further comprises an arc-shaped connecting piece rotating shaft and a fixing bolt, one horizontal end of the arc-shaped buckle body is connected with one horizontal end of the arc-shaped connecting piece through the arc-shaped connecting piece rotating shaft, the arc-shaped connecting piece is hingedly arranged with the arc-shaped connecting piece rotating shaft, the arc-shaped connecting piece can rotate around the vertical central axis of the arc-shaped connecting piece rotating shaft, the arc-shaped connecting piece rotating shaft is arranged along the vertical direction, a fixing bolt is perpendicularly arranged on the arc-shaped connecting piece rotating shaft, a bolt through hole is arranged on the arc-shaped buckle body, one end of the fixing bolt is fixedly arranged with the arc-shaped connecting piece rotating shaft, the other end of the fixing bolt can pass through the bolt through hole and extend outside the bolt through hole, an adjusting nut is threadedly engaged with the fixing bolt arranged outside the bolt through hole, and the diameter of the adjusting nut is larger than the diameter of the bolt through hole.

[0017] Further, the shape of the locking ring connecting through hole is designed as a conical shape with the upper part being wide and the lower part being narrow, the shape of the outer surface of the locking ring is also designed as a conical shape with the upper part being wide and the lower part being narrow, the shape of the locking ring connecting through hole is matched with the shape of the outer surface of the locking ring, the taper of the outer surface of the locking ring is the same as the taper of the locking ring connecting through hole, and the conical shape with the upper part being wide and the lower part being narrow has a guiding effect.

[0018] The utility model discloses the advantages and positive effects are as follows:

[0019] 1、the utility model discloses when using, after placing the locking ring of positioning device in the locking ring connecting through hole of gun seat, using locking bolt fixes the locking ring stably, then through locking device tightly fixes the flame cutting gun, then the flame cutting gun can carry out normal work, when needing to replace, only need to detach the flame cutting gun from positioning device and locking device, then the flame cutting gun can be replaced after being drawn out.

[0020] The device is designed under the premise of ensuring the existing installation form. The device considers both positioning and adjustment of the cutting gun. The device can realize accurate positioning and convenient on-site adjustment operation, and realize quick switching.

[0021] The gun seat structure of the device considers the installation of the existing cutting gun swing mechanism. The bolt connection method is used. The same positioning bolt hole size and position as the original installation position are selected to facilitate quick replacement. In order to ensure the perpendicularity requirement of the gun position, double gun seat positioning is selected, that is, two gun seats are designed to be arranged in parallel and coaxial along the vertical direction. Through two-point positioning, the perpendicularity of the gun can be ensured. The positioning device of the device is in the form of a positioning sleeve. The positioning device and the locking device can be closely and detachably connected with the flame cutting gun. The device not only facilitates installation and disassembly, but also improves work efficiency. The device can ensure the perpendicularity requirement of the cutting gun body in structure, can realize quick replacement in operation, and can be adjusted by two locking devices in gun position adjustment. The standby gun position is adjusted in advance according to the production demand, and it is not necessary to adjust again in the production process, which greatly reduces the work load of gun replacement and further improves the production efficiency.

[0022] The locking bolt of the device provides additional fastening force. The positioning device and the locking device complement each other and jointly ensure that the cutting gun can remain stable and not shake when running at high speed or bearing large cutting force. The design of the open gun seat, that is, the connection through hole of the locking ring, is simple and clear in structure, without unnecessary parts. The open gun seat not only reduces the overall weight, but also makes the installation and disassembly process extremely simple. This design not only reduces the manufacturing cost, but also shows excellent performance in quick gun replacement, providing greater convenience and flexibility for operators.

[0023] In summary, the device can ensure the perpendicularity of the cutting gun body and realize quick replacement and pre-adjustment of the gun position.

[0024] 2、The design adopts a double fixing mode, which significantly improves the positioning accuracy of the cutting gun during operation. Through the double locking mechanism, not only the vibration and deviation that may occur during operation are effectively resisted, but also the cutting path is ensured to be accurate and error-free, thereby greatly improving the work efficiency and product quality.

[0025] 3、In the selection of the fastener positioning mode, the convenience and efficiency of on-site operation are fully considered. The fastener structure makes the quick replacement of the cutting gun easy, without the need for complex tools or complicated steps. The replacement operation can be completed in a short time, greatly shortening the downtime and improving the overall work efficiency.

[0026] 4. The gun holder adopts a conical positioning method, which greatly enhances the stability of the cutting gun positioning. The conical positioning surface fits tightly with the gun body, effectively distributing the force, while the locking bolt provides additional tightening force. The two complement each other to ensure that the cutting gun remains stable and does not shake even when operating at high speed or under large cutting forces.

[0027] 5. The open-type positioning base design results in a simple and clear structure without unnecessary parts, which not only reduces the overall weight but also makes installation and disassembly exceptionally easy. This design not only reduces manufacturing costs but also demonstrates superior performance in quick gun changes, providing operators with greater convenience and flexibility. Attached Figure Description

[0028] Figure 1 This is a front view of a structural connection according to this utility model;

[0029] Figure 2 for Figure 1 A three-dimensional schematic diagram of a structural connection;

[0030] Figure 3 for Figure 1 A three-dimensional schematic diagram of a structural connection of a gun base;

[0031] Figure 4 for Figure 1 A three-dimensional schematic diagram of the structural connection of a positioning device;

[0032] Figure 5 for Figure 1 A three-dimensional schematic diagram of the structure of a locking device. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to specific embodiments. The following embodiments are merely descriptive and not limiting, and should not be used to limit the scope of protection of the present invention.

[0034] Unless otherwise specified, all raw materials used in this invention are commercially available products. Unless otherwise specified, all methods used in this invention are conventional methods in the field. All substances used in this invention are of conventional mass. Structures, connections, etc., not described in detail in this invention can be understood as conventional techniques in the field.

[0035] A quick-change torch holder device for a flame cutting machine, the flame cutting machine including a flame cutting torch 4 and a torch tilting mechanism (not shown in the figure) connected together, such as... Figure 1 , Figure 2As shown, the quick gun changing gun rack device can be connected with the flame cutting gun and the swing gun mechanism in a detachable manner; the device comprises a connecting gun seat 1, a positioning device 2 and a locking device 3, the connecting gun seat is arranged in a vertical direction, the positioning device is arranged on the connecting gun seat in a detachable manner, and the positioning device is coaxially arranged on the locking device;

[0036] As shown in the figure, Figure 3 The connecting gun seat comprises a connecting frame 11, a gun seat 12 and a locking bolt 14, the connecting frame is arranged in a vertical direction, the gun seat is arranged on the connecting frame, and two or more bolt through holes 11-1 are integrally formed on one side of the connecting frame in a spaced apart manner, the connecting frame can be detachably fixed with the swing gun mechanism through the bolt through holes and the bolts (not shown in the figure); in the design of the connecting gun seat, considering the installation of the existing cutting gun swing gun mechanism, the bolt connection mode is used for the gun rack device, the connecting frame can be detachably fixed with the swing gun mechanism through the bolt through holes and the bolts (not shown in the figure), and the same size and position of the positioning bolt hole as the original installation position are selected to facilitate quick replacement.

[0037] The gun seat and the locking bolt are arranged in a horizontal direction, and the gun seat is arranged in a vertical direction in parallel and spaced apart in a coaxial manner, and two gun seats are arranged in a coaxial manner in an upper-lower direction, one side of the gun seat is fixed to the other side of the connecting frame, a locking ring connecting through hole 13 is integrally formed in the gun seat in a coaxial manner, the locking ring connecting through hole is arranged in a vertical direction and extends from the upper surface of the gun seat to the lower surface of the gun seat, the locking ring connecting through hole is matched with the locking ring, and the locking ring can be coaxially and detachably connected in the locking ring connecting through hole, so as to facilitate the installation and disassembly of the flame cutting gun, and the use is convenient and fast.

[0038] A bolt mounting through hole 13-1 is also formed on the gun seat in a connected manner, the bolt mounting through hole is arranged in a horizontal direction and extends from one horizontal side of the gun seat to the other horizontal side of the gun seat, the bolt mounting through hole is matched with the locking bolt, the bolt mounting through hole is connected in communication with the locking ring connecting through hole in a facing manner, and the locking bolt can be detachably and threadedly mounted in the bolt mounting through hole, so as to facilitate the installation and disassembly of the locking bolt, and the use is convenient and fast; the locking bolt can lock and loosen the locking ring arranged in the locking ring connecting through hole, and then the gun seat can lock, loosen and disassemble the locking ring arranged in the locking ring connecting through hole through the locking bolt, the bolt mounting through hole and the locking ring, so as to facilitate the installation and disassembly, and the use is convenient and fast.

[0039] As shown in the figure, Figure 4As shown, the positioning device comprises a positioning ring 21 and a locking ring 22, both of which are provided in a hollow cylindrical shape, the locking ring is coaxially connected below the positioning ring, the hollow interiors of the positioning ring and the locking ring are provided in a cylindrical shape, and the hollow interiors of the positioning ring and the locking ring are connected in series in the upper and lower directions, the hollow interiors of the positioning ring and the locking ring are matched with the flame cutting gun, and the flame cutting gun can be detachably arranged in the hollow interiors of the positioning ring and the locking ring.

[0040] The locking ring can be detachably connected in the locking ring connecting through hole in the gun seat, the diameter of the positioning ring is greater than that of the locking ring connecting through hole of the gun seat, and the positioning ring can be detachably connected on the upper surface of the gun seat, so that the locking ring is supported and cannot fall off from the locking ring connecting through hole, and the mounting stability of the flame cutting gun is ensured.

[0041] As shown in Figure 5 The locking device can be detachably connected with the flame cutting gun, and the locking device is coaxially connected with the positioning ring and the locking ring, and the locking device is connected with the positioning ring, so that the locking device can position and lock the flame cutting gun.

[0042] When the utility model is used, after the locking ring of the positioning device is placed in the locking ring connecting through hole of the gun seat, the locking ring is fixed and stabilized by using the locking bolt, the flame cutting gun is inserted into the hollow interior of the positioning ring and the locking ring, the position of the flame cutting gun is fixed by the locking device, then the flame cutting gun can work normally, when replacement is needed, the flame cutting gun can be disassembled from the positioning device and the locking device, the flame cutting gun can be extracted for replacement or position adjustment.

[0043] The device is designed under the premise of ensuring the existing installation form, and considers both positioning and adjustment of the cutting gun, so that accurate positioning is realized, and on-site adjustment operation is facilitated, and rapid switching is realized.

[0044] The gun seat structure of the device takes into account the installation of the existing cutting gun swing gun mechanism, and the bolt connection mode is used. The same positioning bolt hole size and position as the original installation position are selected to facilitate quick replacement and replacement. At the same time, in order to ensure the perpendicularity requirement of the gun position, double gun seat positioning is selected, that is, two gun seats are designed to be arranged in parallel and coaxial in the vertical direction. Through two-point positioning, the perpendicularity of the gun can be ensured. The positioning device of the device is in the form of a positioning sleeve. The positioning device and the locking device can be closely and detachably connected with the flame cutting gun. Not only is the installation and disassembly convenient, but also the work efficiency is improved. The device can ensure the perpendicularity requirement of the cutting gun body in structure, can realize quick replacement in operation, and can be adjusted by two locking devices in gun position adjustment. The standby gun position is adjusted in advance according to the production demand, and it is not necessary to adjust again in the production process, which greatly reduces the work load of gun replacement and further improves the production efficiency.

[0045] The locking bolt of the device provides additional fastening force. The positioning device and the locking device complement each other and jointly ensure that the cutting gun can still remain stable and not shake when running at high speed or bearing a large cutting force. The design of the open gun seat, that is, the locking ring connecting hole, is simple in structure and has no redundant parts, which not only reduces the overall weight, but also makes the installation and disassembly process extremely simple. This design not only reduces the manufacturing cost, but also exhibits excellent performance in quick gun replacement, providing greater convenience and flexibility for operators.

[0046] In summary, the device can not only ensure the perpendicularity of the cutting gun body, but also realize quick replacement and pre-adjustment of the gun position.

[0047] In the embodiment, the locking device and the positioning device are combined and welded together, which improves the structural stability of the device and is simple and convenient to operate.

[0048] As Figure 5As shown, the locking device comprises an arc-shaped buckle body 31, an arc-shaped connecting piece 32 and a clasp 33, the arc-shaped buckle body, the arc-shaped connecting piece and the clasp are arranged in the horizontal direction, the arc-shaped connecting piece and the arc-shaped buckle body are arranged in an arc shape, the arc-shaped connecting piece and the arc-shaped buckle body can be closely and detachably connected to set the flame cutting gun, the horizontal one end of the arc-shaped buckle body is connected to the horizontal one end of the arc-shaped connecting piece, the horizontal other end of the arc-shaped buckle body is connected to the horizontal one end of the clasp through a rotating shaft 33-1, the horizontal other end of the arc-shaped connecting piece is detachably connected to the horizontal other end of the clasp, the arc-shaped buckle body, the arc-shaped connecting piece and the clasp form a lobster claw type structure, the structure can closely and detachably connect the flame cutting gun, the clasp can be closed and opened to lock and release the flame cutting gun, and the arc-shaped buckle body is fixedly connected to the positioning ring of the positioning device. The arrangement of the arc-shaped buckle body, the arc-shaped connecting piece and the clasp enables the locking device to position and lock the flame cutting gun. In use, after the flame cutting gun is connected to the locking device and the positioning device, the position of the flame cutting gun is determined according to actual work requirements, the clasp is closed, the flame cutting gun works, and when replacement is needed, the clasp is opened, and the flame cutting gun is pulled out for replacement.

[0049] In the embodiment, the locking device further comprises an arc-shaped connecting piece rotating shaft 34 and a fixing bolt 35, the horizontal one end of the arc-shaped buckle body is connected to the horizontal one end of the arc-shaped connecting piece through the arc-shaped connecting piece rotating shaft, the arc-shaped connecting piece is hingedly arranged with the arc-shaped connecting piece rotating shaft, the arc-shaped connecting piece can rotate around the vertical central axis of the arc-shaped connecting piece rotating shaft, the arc-shaped connecting piece rotating shaft is arranged in the vertical direction, a fixing bolt is vertically connected to the arc-shaped connecting piece rotating shaft, a bolt through hole 31-1 is arranged on the arc-shaped buckle body, one end of the fixing bolt is fixedly connected to the arc-shaped connecting piece rotating shaft, the other end of the fixing bolt can pass through the bolt through hole and extend outside the bolt through hole, an adjusting nut 35-1 is threadedly engaged with the fixing bolt outside the bolt through hole, the diameter of the adjusting nut is greater than the diameter of the bolt through hole, the arc-shaped connecting piece can be locked by the adjusting nut to avoid rotation, thereby locking the flame cutting gun arranged inside, when the position of the flame cutting gun needs to be adjusted or the flame cutting gun needs to be replaced, the adjusting nut is loosened, and then the arc-shaped connecting piece is rotated to be opened, so that the replacement or adjustment operation can be performed, thereby improving the convenience of connection between the flame cutting gun and the locking device. The locking device in the form of a locking buckle can conveniently realize the locking and positioning of the gun position by adjusting the locking bolt.

[0050] In the embodiment, the shape of the locking ring connecting through hole is set as a conical shape with the upper part wide and the lower part narrow, the shape of the outer surface of the locking ring is also set as a conical shape with the upper part wide and the lower part narrow, the shape of the locking ring connecting through hole is matched with the shape of the outer surface of the locking ring, the taper of the outer surface of the locking ring is the same as the taper of the locking ring connecting through hole, the conical shape with the upper part wide and the lower part narrow has a guiding effect, so that the locking ring can be quickly installed into the locking ring connecting through hole during installation. The shape of the locking ring connecting through hole and the outer surface of the locking ring is designed as a tapered guiding and positioning form, the taper is the same as the taper of the inner hole of the gun seat, the gun seat is designed to adopt taper positioning, so that the guiding and positioning effect can be realized, and the stability of the cutting gun positioning is greatly enhanced. The tapered positioning surface is closely combined with the gun body, the stress is effectively dispersed, and it is further ensured that the cutting gun can still remain stable and not shake when running at high speed or bearing a large cutting force, so that the normal and accurate operation is ensured.

[0051] Although the embodiments of the present application are disclosed for illustrative purposes, those skilled in the art can understand that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present application and the appended claims, therefore, the scope of the present application is not limited to the disclosed content of the embodiments.

Claims

1. A quick change torch holder assembly for a flame cutting machine, the flame cutting machine including a flame cutting torch and a torch swing mechanism arranged in connection, characterized in that: The quick gun changing gun rack device can be detachably connected with the flame cutting gun and the swing gun mechanism; the device comprises a connecting gun seat, a positioning device and a locking device, the connecting gun seat is arranged in the vertical direction, the positioning device is detachably connected on the connecting gun seat, and the positioning device is coaxially and fixedly connected below the locking device; The connecting gun seat comprises a connecting frame, a gun seat and locking bolts, the connecting frame is arranged in the vertical direction, the gun seat is connected on the connecting frame, two or more than two bolt through holes are integrally formed on one longitudinal side of the connecting frame, and the connecting frame can be detachably fixed with the swing gun mechanism through the bolt through holes and the bolts; The gun seat and the locking bolts are arranged in the horizontal direction, two gun seats are coaxially and spaced apart in the vertical direction, one longitudinal side of the gun seat is fixed on the other longitudinal side of the connecting frame, a locking ring connecting through hole is integrally and coaxially formed in the gun seat, the locking ring connecting through hole is arranged in the vertical direction and extends from the upper surface of the gun seat to the lower surface of the gun seat, the locking ring connecting through hole is matched with the locking ring, and the locking ring can be coaxially and detachably connected in the locking ring connecting through hole; The gun seat is also provided with a bolt mounting through hole matched with the locking bolt, the bolt mounting through hole is arranged in the horizontal direction and extends from one horizontal side of the gun seat to the other horizontal side of the gun seat, the bolt mounting through hole is connected with the locking ring connecting through hole, and the bolt mounting through hole can detachably and threadedly engage the locking bolt; The positioning device comprises a positioning ring and a locking ring, both the positioning ring and the locking ring are hollow cylindrical, the locking ring is coaxially and connected below the positioning ring, the hollow interiors of the positioning ring and the locking ring are cylindrical, and the hollow interiors of the positioning ring and the locking ring are connected in series in the vertical direction, the hollow interiors of the positioning ring and the locking ring are matched with the flame cutting gun, and the flame cutting gun can be detachably arranged in the hollow interiors of the positioning ring and the locking ring; The locking ring can be detachably connected in the locking ring connecting through hole in the gun seat, the diameter of the positioning ring is greater than that of the locking ring connecting through hole of the gun seat, and the positioning ring can be detachably connected on the upper surface of the gun seat; The locking device can be closely and detachably connected with the flame cutting gun, the locking device is coaxially and connected with the positioning ring and the locking ring, and the locking device is connected with the positioning ring, so that the locking device can position and lock the flame cutting gun.

2. A quick change torch holder assembly for a flame cutting machine as defined in claim 1, wherein: The locking device and the positioning device are combined and welded together. The locking device comprises an arc-shaped buckle body, an arc-shaped connecting piece and a clasp, the arc-shaped buckle body, the arc-shaped connecting piece and the clasp are arranged along the horizontal direction, the arc-shaped connecting piece and the arc-shaped buckle body are arranged in an arc shape, and the arc-shaped connecting piece and the arc-shaped buckle body are tightly and detachably connected to set the flame cutting gun, the horizontal one end of the arc-shaped buckle body is connected to the horizontal one end of the arc-shaped connecting piece, the horizontal other end of the arc-shaped buckle body is connected to the horizontal one end of the clasp through a rotating shaft, the horizontal other end of the arc-shaped connecting piece is detachably connected to the horizontal other end of the clasp, the arc-shaped buckle body, the arc-shaped connecting piece and the clasp form a lobster buckle structure, the flame cutting gun is tightly and detachably connected in the structure, the clasp is closed and opened to lock and release the flame cutting gun, and the arc-shaped buckle body is fixedly connected to the positioning ring of the positioning device.

3. A quick change torch holder assembly for a flame cutting machine as defined in claim 1, wherein: The locking device further comprises an arc-shaped connecting piece rotating shaft and a fixing bolt, the horizontal one end of the arc-shaped buckle body is connected to the horizontal one end of the arc-shaped connecting piece through the arc-shaped connecting piece rotating shaft, the arc-shaped connecting piece is hingedly arranged with the arc-shaped connecting piece rotating shaft, the arc-shaped connecting piece can rotate around the vertical central axis of the arc-shaped connecting piece rotating shaft, the arc-shaped connecting piece rotating shaft is arranged along the vertical direction, a fixing bolt is perpendicularly connected to the arc-shaped connecting piece rotating shaft, a bolt through hole is arranged on the arc-shaped buckle body, one end of the fixing bolt is fixedly connected to the arc-shaped connecting piece rotating shaft, the other end of the fixing bolt can pass through the bolt through hole and extend outside the bolt through hole, an adjusting nut is threadedly engaged with the fixing bolt outside the bolt through hole, and the diameter of the adjusting nut is greater than the diameter of the bolt through hole.

4. A quick change torch holder assembly for a flame cutting machine as defined in any one of claims 1 to 3, characterized in that: The shape of the locking ring connecting through hole is set as a conical shape with the upper part being wide and the lower part being narrow, the shape of the outer surface of the locking ring is also set as a conical shape with the upper part being wide and the lower part being narrow, the shape of the locking ring connecting through hole is matched with the shape of the outer surface of the locking ring, the taper of the outer surface of the locking ring is the same as the taper of the locking ring connecting through hole, and the conical shape with the upper part being wide and the lower part being narrow has a guiding effect.

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