Gas cutting circular cutting device

Abstract

This utility model relates to the field of shipbuilding technology, and in particular to an oxy-fuel cutting device for circular cutting. The oxy-fuel cutting device includes a first connecting ruler, a second connecting ruler, an oxy-fuel cutting component, a magnetic absorbing component, and a connecting component. The oxy-fuel cutting component is configured to cut sheet metal, and the magnetic absorbing component can be magnetically fixed to the sheet metal. One end of the first connecting ruler along its length is rotatably connected to the magnetic absorbing component around its thickness. One end of the second connecting ruler along its length is detachably connected to the oxy-fuel cutting component. The areas of the first and second connecting rulers without the magnetic absorbing component and without the oxy-fuel cutting component are partially stacked together along their thickness. The area of ​​the first and second connecting rulers stacked together along their thickness is adjustable along both the length and thickness directions. The connecting component is configured to fix the first and second connecting rulers stacked together along their thickness, simultaneously changing the radius of the cutting circle and the construction space required by the oxy-fuel cutting device.

Description

Technical Field

[0001] This utility model relates to the field of shipbuilding technology, and in particular to a gas cutting device for round cutting. Background Technology

[0002] During the construction of a ship in sections, holes need to be made in narrow spaces on the plates of each section to facilitate subsequent assembly.

[0003] In related technologies, workers need to manually cut holes in the plate of ship sections using an oxy-acetylene torch. Specifically, before drilling, coordinates are established on the plate to determine the radius of the cutting hole and the center point. Then, the oxy-acetylene torch is used to rotate around the center point to cut a circular hole. However, in actual cutting, the oxy-acetylene torch cannot move along the predetermined circular cutting trajectory, resulting in an uneven cut. This necessitates additional grinding and cutting, wasting considerable time and reducing cutting efficiency. A new circular cutting structure has been developed, comprising a base point column, an adjusting rod, and an adjusting slider. The base point column and the adjusting rod are axially rotatably connected. The base point column is fixed to the center point, and the oxy-acetylene torch is fixed to the adjusting slider. The adjusting slider can slide along the axis of the adjusting rod to change the radius of the cutting hole, enabling the cutting of circular holes with different radii. However, the adjusting rod in this circular cutting structure is relatively large, requiring a large working space. In practical applications, due to limited working space, this circular cutting structure is often unusable.

[0004] Therefore, there is an urgent need to invent a gas cutting device for round cutting to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an oxy-fuel cutting device for precisely cutting holes. Furthermore, by adjusting the radius of the cutting hole, the overall size of the oxy-fuel cutting device can be adjusted to reduce the required construction space and meet actual construction needs.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Gas cutting circular cutting device, including:

[0008] Gas cutting components are configured for cutting sheet metal.

[0009] The magnetic attachment component can be magnetically fixed to the plate.

[0010] A first connecting ruler, one end of the first connecting ruler along the length direction is rotatably connected to the magnetic suction component around the thickness direction;

[0011] A second connecting ruler, one end of which is detachably connected to the gas cutting component along the length direction, wherein the areas of the first connecting ruler without the magnetic attachment and the second connecting ruler without the gas cutting component are partially stacked together along the thickness direction, and the area of ​​the first and second connecting rulers stacked together along the thickness direction is adjustable along the length direction and adjustable around the thickness direction; and

[0012] A connecting component configured to securely connect a first connecting ruler and a second connecting ruler that are stacked together along the thickness direction.

[0013] As an optional solution, the first connecting ruler has a first mating groove extending along the length direction, and the second connecting ruler has a second mating groove extending along the length direction. The connecting assembly passes through the first mating groove and the second mating groove in sequence along the thickness direction to fix the first connecting ruler and the second connecting ruler together.

[0014] As an optional solution, the connection component includes:

[0015] The screw, which sequentially passes through the first mating groove and the second mating groove; and

[0016] Two nuts are provided. The screw extends from the first mating groove and the second mating groove at its two ends along the axial direction of the screw, respectively. One of the two nuts is threadedly fixed to the portion of the screw extending from the first mating groove, and the other of the two nuts is threadedly fixed to the portion of the screw extending from the second mating groove. The nuts can abut against the first connecting ruler or the second connecting ruler. The axial direction of the screw is parallel to the thickness direction.

[0017] As an optional solution, the magnetic attraction component includes:

[0018] A magnetic attractor, the magnetic attractor being configured to magnetically attach to the sheet metal;

[0019] The adapter has a receiving groove for accommodating the magnetic component. The end face opposite to the end face of the receiving groove in the adapter is provided with an adapter protrusion extending along the thickness direction. The first connecting ruler has a first mounting through hole extending along the thickness direction. The adapter protrusion is rotatably connected to the first mounting through hole.

[0020] As an optional solution, the magnetic attraction component further includes:

[0021] A bearing is disposed between the outer peripheral wall of the transition protrusion along the thickness direction and the inner cavity wall of the first mounting through hole.

[0022] As an optional solution, the magnetic attraction component further includes:

[0023] Grease, which fills the internal voids of the bearing.

[0024] As an optional solution, the end face of the adapter with the receiving groove is square, and the square end face has four vertices. When the four vertices coincide with the horizontal and vertical reference lines of the plate respectively, the magnetic suction component is directly opposite the center point of the circle formed by the horizontal and vertical reference lines.

[0025] As an optional solution, the first connecting ruler is provided with a first scale extending along the length direction;

[0026] The second connecting ruler is provided with a second scale extending along the length direction.

[0027] As an optional option, both the first connecting ruler and the second connecting ruler are made of stainless steel.

[0028] As an optional solution, the gas cutting component includes:

[0029] An oxy-fuel cutting body configured to cut the plate, the oxy-fuel cutting body having a mating protrusion, the outer peripheral wall of the mating protrusion being provided with external threads; and

[0030] The locking nut has a second mounting through hole extending along the thickness direction on the second connecting ruler. The mating protrusion can pass through the second mounting through hole, and the part of the mating protrusion that passes through the second mounting through hole is threadedly fixed to the locking nut.

[0031] The beneficial effects of this utility model are:

[0032] The gas cutting circular cutting device provided by this utility model achieves this by rotatably connecting a magnetic suction component to one end of a first connecting ruler along its length direction and around its thickness direction, and detachably connecting a gas cutting component to one end of a second connecting ruler along its length direction. This allows the areas of the first connecting ruler without the magnetic suction component and the areas of the second connecting ruler without the gas cutting component to be stacked together along their thickness direction. A connecting component then secures the stacked first and second connecting rulers together. When a hole needs to be cut in the sheet metal, the magnetic suction component is magnetically attached to the central point on the sheet metal, and the rotational connection between the magnetic suction component and the first connecting ruler around its thickness direction drives the gas cutting component to rotate around the central point. This allows the gas cutting component to complete the cutting of the hole around the circular point on the sheet metal, ensuring precise cutting. The cutting effect is achieved by making the stacking area of ​​the first and second connecting rulers along the thickness direction adjustable along the length direction and around the thickness direction. This allows for changing the straight-line distance between the gas cutting component and the magnetic suction assembly, i.e., changing the radius of the cutting hole, while simultaneously changing the overall size of the first and second connecting rulers, i.e., changing the overall size of the gas cutting device. When it is necessary to shorten the radius of the cutting hole, the stacking area of ​​the first and second connecting rulers can be increased along the length direction, or the first and second connecting rulers can be brought closer together around the thickness direction. This changes the size of the first and second connecting rulers along the length direction, thereby reducing the size of the gas cutting device and achieving the goal of reducing the construction space required by the gas cutting device, thus meeting actual construction needs. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the gas cutting circle cutting device provided in this embodiment of the utility model;

[0034] Figure 2 This is a first structural schematic diagram of the first connecting ruler, the second connecting ruler, the connecting component, and the magnetic component provided in this embodiment of the utility model;

[0035] Figure 3 This is a second structural schematic diagram of the first connecting ruler, the second connecting ruler, the connecting component, and the magnetic component provided in this embodiment of the utility model;

[0036] Figure 4 yes Figure 1 A magnified view of a portion of point A in the middle.

[0037] In the picture:

[0038] 100. Gas cutting circular cutting device; 110. First connecting ruler; 111. First mating groove; 112. First mounting through hole; 113. First scale; 120. Second connecting ruler; 121. Second mating groove; 122. Second mounting through hole; 123. Second scale; 130. Gas cutting component; 140. Magnetic suction assembly; 141. Magnetic suction component; 142. Adapter component; 1421. Adapter protrusion; 1422. Receiving groove; 143. Bearing; 150. Connecting assembly; 151. Screw; 152. Nut. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0040] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0043] During the sectional construction of ships, holes need to be drilled in narrow spaces on the plates of each section for subsequent assembly. Specifically, before drilling, coordinates are established on the plate to determine the center point and the radius of the cutting hole. Then, an oxy-acetylene torch is used to rotate around the center at the determined radius to cut a circular hole. However, in actual cutting, the torch cannot move along the predetermined circular cutting trajectory, resulting in an uneven cut. This necessitates additional grinding and cutting, wasting considerable time and reducing efficiency. A new circular cutting structure has been developed, comprising a base point column, an adjusting rod, and an adjusting slider. The base point column and adjusting rod are axially rotatably connected. The base point column is fixed to the center point, and the torch is fixed to the adjusting slider, which can slide along the adjusting rod to change the radius of the cutting hole, enabling the cutting of circular holes with different radii. However, this circular cutting structure has a relatively large adjusting rod, requiring a large construction space. In practical applications, due to limited working space, this circular cutting structure is often unusable.

[0044] To solve the above problems, such as Figures 1-3 As shown, this embodiment provides an oxy-fuel cutting circular cutting device 100. The oxy-fuel cutting circular cutting device 100 includes a first connecting ruler 110, a second connecting ruler 120, an oxy-fuel cutting component 130, a magnetic suction assembly 140, and a connecting assembly 150. The oxy-fuel cutting component 130 is configured to cut a sheet metal, and the magnetic suction assembly 140 can be magnetically fixed to the sheet metal. One end of the first connecting ruler 110 along its length is rotatably connected to the magnetic suction assembly 140, and one end of the second connecting ruler 120 along its length is detachably connected to the oxy-fuel cutting component 130. The area of ​​the first connecting ruler 110 without the magnetic suction assembly 140 and the area of ​​the second connecting ruler 120 without the oxy-fuel cutting component 130 are partially stacked together along the thickness direction. The area of ​​the first connecting ruler 110 and the second connecting ruler 120 stacked together along the thickness direction is adjustable along the length direction and adjustable around the thickness direction. The connecting assembly 150 is configured to fixably connect the first connecting ruler 110 and the second connecting ruler 120 stacked together along the thickness direction.

[0045] The gas cutting circular cutting device 100 connects the magnetic suction assembly 140 to one end of the first connecting ruler 110 along its length direction and rotates it around its thickness direction, and detachably connects the gas cutting component 130 to one end of the second connecting ruler 120 along its length direction. This allows the areas of the first connecting ruler 110 without the magnetic suction assembly 140 and the areas of the second connecting ruler 120 without the gas cutting component 130 to be stacked together along their thickness direction. A connecting assembly 150 then secures the stacked first and second connecting rulers 110 and 120 together. When a hole needs to be cut in the plate, the magnetic suction assembly 140 is magnetically attracted to the central point on the plate, and the rotational connection between the magnetic suction assembly 140 and the first connecting ruler 110 around its thickness direction drives the gas cutting component 130 to rotate around the central point, allowing the gas cutting component 130 to complete the cutting of the hole in the plate around the circular point, ensuring accurate cutting. The effect is that by making the stacking area of ​​the first connecting ruler 110 and the second connecting ruler 120 along the thickness direction adjustable along the length direction and around the thickness direction, it is possible to change the linear distance between the gas cutting component 130 and the magnetic suction component 140, i.e., change the radius of the cutting hole, while simultaneously changing the overall size of the first connecting ruler 110 and the second connecting ruler 120, i.e., changing the overall size of the gas cutting circle cutting device 100. When it is necessary to shorten the radius of the cutting hole, the stacking area of ​​the first connecting ruler 110 and the second connecting ruler 120 can be increased along the length direction, or the first connecting ruler 110 and the second connecting ruler 120 can be brought closer to each other around the thickness direction. At this time, the size of the first connecting ruler 110 and the second connecting ruler 120 along the length direction can be changed, thereby reducing the size of the gas cutting circle cutting device 100, achieving the purpose of reducing the construction space required by the gas cutting circle cutting device 100, and meeting the actual construction needs.

[0046] As an optional solution, the first connecting ruler 110 and the second connecting ruler 120 are made of stainless steel. Using stainless steel not only ensures sufficient structural strength for both rulers but also prevents them from rusting, thus extending their service life. It should be noted that in this embodiment, the first connecting ruler 110 and the second connecting ruler 120 are made of 304 stainless steel. In other embodiments, different grades of stainless steel can be used to manufacture the first connecting ruler 110 and the second connecting ruler 120 according to actual needs; this embodiment does not impose a specific limitation.

[0047] In an alternative implementation, such as Figure 2As shown, the first connecting ruler 110 has a first mating groove 111 extending along the length direction, and the second connecting ruler 120 has a second mating groove 121 extending along the length direction. The connecting assembly 150 passes through the first mating groove 111 and the second mating groove 121 in sequence along the thickness direction to fix the first connecting ruler 110 and the second connecting ruler 120 together. By creating a first mating groove 111 extending along the length direction in the first connecting ruler 110 and a second mating groove 121 extending along the length direction in the second connecting ruler 120, the connecting assembly 150 sequentially passes through the first mating groove 111 and the second mating groove 121 along the thickness direction to fix the first connecting ruler 110 and the second connecting ruler 120 together. When adjusting the relative positions of the first connecting ruler 110 and the second connecting ruler 120 along the length direction or around the thickness direction, it is always ensured that the first mating groove 111 and the second mating groove 121 have overlapping portions along the thickness direction. This ensures that when adjusting the relative positions of the first connecting ruler 110 and the second connecting ruler 120 along the length direction or around the thickness direction, the connecting assembly 150 can fix the first connecting ruler 110 and the second connecting ruler 120 together along the thickness direction.

[0048] Optionally, such as Figure 1 As shown, the connecting assembly 150 includes a screw 151 and two nuts 152. The screw 151 passes through the first mating groove 111 and the second mating groove 121 in sequence. The two ends of the screw 151 extend out of the first mating groove 111 and the second mating groove 121 respectively along the axial direction of the screw 151. Either one of the two nuts 152 is threadedly fixed to the part of the screw 151 extending out of the first mating groove 111, and the other of the two nuts 152 is threadedly fixed to the part of the screw 151 extending out of the second mating groove 121. The nut 152 can abut against the first connecting ruler 110 or the second connecting ruler 120. The axial direction of the screw 151 is parallel to the thickness direction. By sequentially passing the screw 151 through the first mating groove 111 and the second mating groove 121 along the axial direction, so that both ends of the screw 151 extend out of the first mating groove 111 and the second mating groove 121 respectively, one of the two nuts 152 is threadedly fixed to the portion of the screw 151 extending out of the first mating groove 111, and the other of the two nuts 152 is threadedly fixed to the portion of the screw 151 extending out of the second mating groove 121. By utilizing the abutment between the nut 152 and the first connecting ruler 110 or the second connecting ruler 120, the effect of the two nuts 152 working together with the screw 151 to clamp and fix the first connecting ruler 110 and the second connecting ruler 120 along the thickness direction is achieved.

[0049] Combination Figure 4The specific structure of the magnetic suction assembly 140 is described below. The magnetic suction assembly 140 includes a magnetic suction member 141 and an adapter member 142. The magnetic suction member 141 is configured to be magnetically fixed to the plate. The adapter member 142 has a receiving groove 1422 for accommodating the magnetic suction member 141. An adapter protrusion 1421 extending in the thickness direction is provided on the end face of the adapter member 142 opposite to the end face where the receiving groove 1422 is provided. A first mounting through hole 112 extending in the thickness direction is provided on the first connecting ruler 110. The adapter protrusion 1421 is rotatably connected to the first mounting through hole 112. By providing a receiving groove 1422 on the adapter 142, the magnetic suction component 141 can be stably clamped within the adapter 142. A connecting protrusion 1421 extending along the thickness direction is provided on the end face of the adapter 142 opposite to the end face with the receiving groove 1422. The connecting protrusion 1421 is rotatably connected to the first mounting through hole 112 extending along the thickness direction of the first connecting ruler 110, thus achieving magnetic fixation of the magnetic suction component 140 to the plate and rotatable connection with the first connecting ruler 110 around the thickness direction. It should be noted that in this embodiment, the magnetic suction component 141 is a samarium cobalt magnet. The maximum operating temperature of a samarium cobalt magnet can reach 350℃, meeting practical working requirements.

[0050] To further reduce the rotational resistance between the transition protrusion 1421 and the first connecting ruler 110, the magnetic suction assembly 140 also includes a bearing 143, which is disposed between the outer peripheral wall of the transition protrusion 1421 along its thickness direction and the inner cavity wall of the first mounting through hole 112. It should be noted that in this embodiment, the bearing 143 is a 606 deep groove ball bearing. The 606 deep groove ball bearing has the characteristics of simple structure and excellent load-bearing performance.

[0051] In addition, in this embodiment, the magnetic attraction assembly 140 also includes grease, which fills the internal gap of the bearing 143 to reduce the internal friction of the bearing 143 and improve the protection of the bearing 143.

[0052] In an optional embodiment, the end face of the adapter 142 with the receiving groove 1422 is square, and the square end face has four vertices. When the four vertices coincide with the horizontal and vertical reference lines of the plate, the magnetic suction component 141 is directly aligned with the center point of the circle formed by the horizontal and vertical reference lines. By setting the end face of the adapter 142 with the receiving groove 1422 to be square, when it is necessary to magnetically fix the magnetic suction component 140 to the plate, the four vertices of the square coincide with the horizontal and vertical reference lines of the plate, so that the magnetic suction component 141 is directly aligned with the center point. This not only reduces the positioning difficulty of the magnetic suction component 140 and the center point, but also improves the docking accuracy of the magnetic suction component 140 and the center point.

[0053] In an optional embodiment, the first connecting ruler 110 is provided with a first scale 113 extending along the length direction, and the second connecting ruler 120 is provided with a second scale 123 extending along the length direction. By providing the first scale 113 extending along the length direction on the first connecting ruler 110 and the second scale 123 extending along the length direction on the second connecting ruler 120, when adjusting the relative position of the first connecting ruler 110 and the second connecting ruler 120 along the length direction, the specific value of the movement can be quickly determined according to the first scale 113 and the second scale 123, which facilitates the determination of the radius of the cutting hole.

[0054] In some embodiments, the gas cutting component 130 includes a gas cutting body and a locking nut. The gas cutting body is configured to cut sheet metal and has a mating protrusion. The outer peripheral wall of the mating protrusion is provided with external threads. The second connecting ruler 120 has a second mounting through hole 122 extending along the thickness direction. The mating protrusion can pass through the second mounting through hole 122, and the portion of the mating protrusion passing through the second mounting through hole 122 is threadedly fixed to the locking nut. By opening the second mounting through hole 122 extending along the thickness direction on the second connecting ruler 120, allowing the mating protrusion on the gas cutting body to pass through the second mounting through hole 122, and threading the locking nut to the portion of the mating protrusion passing through the second mounting through hole 122, the gas cutting body and the locking nut can clamp and fix the second connecting ruler 120 along the thickness direction, realizing a detachable connection between the gas cutting component 130 and the second connecting ruler 120. It should be noted that in this embodiment, the gas cutting component 130 is a gas cutting gun, and the gas cutting body is the gas cutting gun body. The specific structure and working principle of the gas cutting gun are existing technologies and will not be elaborated here.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A gas cutting circle cutting device, characterized by, include: An oxy-fuel cutting component (130) is configured to cut sheet metal; The magnetic assembly (140) is capable of being magnetically fixed to the plate. The first connecting ruler (110) has the magnetic suction assembly (140) rotatably connected to one end along the length direction and around the thickness direction; A second connecting ruler (120) is detachably connected to the gas cutting component (130) at one end along the length direction. The area of ​​the first connecting ruler (110) without the magnetic suction component (140) and the area of ​​the second connecting ruler (120) without the gas cutting component (130) are partially stacked together along the thickness direction. The area of ​​the first connecting ruler (110) and the second connecting ruler (120) stacked together along the thickness direction is adjustable along the length direction and adjustable around the thickness direction. as well as A connecting assembly (150) configured to securely connect a first connecting ruler (110) and a second connecting ruler (120) stacked together along the thickness direction.

2. The gas cutting circular cutting device according to claim 1, characterized in that, The first connecting ruler (110) has a first mating groove (111) extending along the length direction, and the second connecting ruler (120) has a second mating groove (121) extending along the length direction. The connecting assembly (150) passes through the first mating groove (111) and the second mating groove (121) in sequence along the thickness direction to fix the first connecting ruler (110) and the second connecting ruler (120) together.

3. The gas cutting circular cutting device according to claim 2, characterized in that, The connection component (150) includes: A screw (151) that passes sequentially through the first mating groove (111) and the second mating groove (121); and Two nuts (152) are provided. The screw (151) extends from the first mating groove (111) and the second mating groove (121) at both ends along the axial direction of the screw (151). One of the two nuts (152) is threadedly fixed to the portion of the screw (151) extending from the first mating groove (111), and the other of the two nuts (152) is threadedly fixed to the portion of the screw (151) extending from the second mating groove (121). The nut (152) can abut against the first connecting ruler (110) or the second connecting ruler (120). The axial direction of the screw (151) is parallel to the thickness direction.

4. The gas cutting circular cutting device according to any one of claims 1 to 3, characterized in that, The magnetic attraction component (140) includes: A magnetic attractor (141) is configured to magnetically attach to the plate. The adapter (142) has a receiving groove (1422) for accommodating the magnetic member (141). The adapter (142) has an adapter protrusion (1421) extending along the thickness direction on the end face opposite to the end face of the receiving groove (1422). The first connecting ruler (110) has a first mounting through hole (112) extending along the thickness direction. The adapter protrusion (1421) is rotatably connected to the first mounting through hole (112).

5. The gas cutting circular cutting device according to claim 4, characterized in that, The magnetic attraction assembly (140) also includes: A bearing (143) is disposed between the outer peripheral wall of the transition protrusion (1421) along the thickness direction and the inner cavity wall of the first mounting through hole (112).

6. The gas cutting circular cutting device according to claim 5, characterized in that, The magnetic attraction assembly (140) also includes: Grease, which fills the internal voids of the bearing (143).

7. The gas cutting circular cutting device according to claim 4, characterized in that, The adapter (142) has a square end face with the receiving groove (1422). The square end face has four apex corners. When the four apex corners coincide with the transverse reference line and the longitudinal reference line of the plate respectively, the magnetic suction member (141) is directly opposite to the center point of the circle formed by the transverse reference line and the longitudinal reference line.

8. The gas cutting circular cutting device according to any one of claims 1 to 3, characterized in that, The first connecting ruler (110) is provided with a first scale (113) extending along the length direction; The second connecting ruler (120) is provided with a second scale (123) extending along the length direction.

9. The gas cutting circular cutting device according to any one of claims 1 to 3, characterized in that, Both the first connecting ruler (110) and the second connecting ruler (120) are made of stainless steel.

10. The gas cutting circular cutting device according to any one of claims 1 to 3, characterized in that, The gas cutting component (130) includes: An oxy-fuel cutting body configured to cut the plate, the oxy-fuel cutting body having a mating protrusion, the outer peripheral wall of the mating protrusion being provided with external threads; and The locking nut has a second mounting through hole (122) extending along the thickness direction on the second connecting ruler (120). The mating protrusion can pass through the second mounting through hole (122). The part of the mating protrusion that passes through the second mounting through hole (122) is threadedly fixed to the locking nut.

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