Surface treatment apparatus and plasma torch

Abstract

The utility model discloses a surface treatment device and a plasma torch. The surface treatment device comprises spraying equipment and a spraying gun. The spraying equipment comprises a bracket and a power supply structure; the power supply structure is provided with a first power connection head, and two first contacts are arranged on one side of the first power connection head; the spray gun comprises a body and a second power connection head, the body is electrically connected with the second power connection head, and the body is detachably connected with the support; one end of the second power connection head is provided with two second contacts, and the second contacts are in one-to-one correspondence contact with the first contacts. And the body can be conveniently disassembled from the spraying equipment, so that the universality is improved.

Description

Technical Field

[0001] The present application relates to the technical field of plasma generating equipment, and in particular to a surface treatment device and a plasma spray gun. Background Art

[0002] In the production process of some products, it is necessary to spray plasma through a surface treatment device to perform surface treatment on the product. The surface treatment device has a spray gun and a spray device. The spray device is used to fix the spray gun and supply power and gas to the spray gun. The spray gun is used to ionize the gas to generate plasma and spray the plasma toward the product. In the related art, the spray gun is fixedly installed on the spray device, and the power cord of the spray gun is welded to the power supply structure on the spray device, so that the spray gun is difficult to remove from the spray device.

[0003] In some cases, different spray guns are required for cleaning different products. Therefore, when a different spray gun is required, another surface treatment device needs to be replaced for cleaning, resulting in poor versatility of the surface treatment device in the related art. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a surface treatment device that can facilitate the replacement of spray guns and improve versatility.

[0005] The present application also proposes a plasma spray gun applied to the above-mentioned surface treatment device.

[0006] A surface treatment device according to the first embodiment of the present application includes: a spray device and a spray gun.

[0007] The injection device comprises a bracket and a power supply structure; the power supply structure is provided with a first power connection head, and the first power connection head is provided with two first contacts;

[0008] The spray gun includes a body and a second power connector, the body is electrically connected to the second power connector, and the body is detachably connected to the bracket; two second contacts are provided at one end of the second power connector, and the second contacts are in one-to-one contact with the first contacts, so that the power supply structure supplies power to the body.

[0009] The surface treatment device according to the first aspect embodiment of the present application has at least the following beneficial effects: the main body is electrically connected to the first power terminal on the power supply structure on the injection device through the second power terminal. Since the first power terminal is detachably connected to the second power terminal, and the main body can be detachably connected to the bracket on the injection device, the main body can be easily disassembled and assembled from the injection device to improve the versatility of the injection device.

[0010] According to some embodiments of the present application, the first electrical connector is provided with an insertion slot, and an insertion block is provided at one end of the second electrical connector. The insertion block is located between the two second contacts and separates the two second contacts. The distance between the insertion block and the two second contacts is different, and the insertion block is inserted into the insertion slot.

[0011] According to some embodiments of the present application, the plug block includes a first side surface and a second side surface that are opposite to each other, the first side surface and the second side surface respectively face two second contacts, the distance between the first side surface and the second contacts facing the first side surface is, the distance between the second side surface and the second contacts facing the second side surface is b, a≠b.

[0012] According to some embodiments of the present application, the first power connector is formed with two power connection slots, each of the power connection slots accommodates one of the first contacts, and the second contact is inserted into the power connection slots.

[0013] According to some embodiments of the present application, the first contact head includes a connecting block, an insulating protrusion and two protrusions, the insulating protrusion and the two protrusions are connected to one side of the connecting block, and the insulating protrusion is located between the two protrusions, each of the connecting slots penetrates the connecting block and a corresponding protrusion, so that an insertion port is formed on a side of the connecting block away from the protrusion, the second contact is inserted into the connecting slot through the insertion port, and the first contact is at least partially located in the protrusion through the connecting slot.

[0014] According to some embodiments of the present application, the first electrical connector forms an insertion chamber, the insertion groove is opened on the bottom wall of the insertion chamber, the second electrical connector is plugged into the insertion chamber, the inner wall of the insertion chamber is provided with a first fool-proofing structure, and the outer wall of the second electrical connector is provided with a second fool-proofing structure. The first fool-proofing structure and the second fool-proofing structure are plugged into each other, so that the second electrical connector is inserted into the insertion chamber in the correct direction.

[0015] According to some embodiments of the present application, the first fool-proofing structure includes a plurality of convex strips, and the convex strips are arranged on two opposite inner side walls of the insertion chamber, and the number of convex strips on the two opposite inner side walls of the insertion chamber is different; the second fool-proofing structure is a fool-proofing groove formed on two opposite outer side walls of the second electrical connection head, and the convex strips correspond one-to-one to the fool-proofing grooves.

[0016] According to some embodiments of the present application, a first clamping structure is disposed on the outer side of the first electrical connector, and a second clamping structure is disposed on the outer side of the second electrical connector, and the first clamping structure is clamped with the second clamping structure.

[0017] According to some embodiments of the present application, the first clamping structure is a clamping hook, and the second clamping structure is a clamping column. The clamping hook is formed with a clamping groove, and the clamping column is clamped in the clamping groove. The groove wall of the clamping groove abuts against the side of the clamping column away from the first electrical terminal, and can provide a locking force to the clamping column toward the first electrical terminal; the clamping hook is rotatably connected to the first electrical terminal, and the clamping column can be clamped into or detached from the clamping groove by rotating the clamping hook.

[0018] According to some embodiments of the present application, a quick-change assembly is further included, wherein the quick-change assembly includes a first mounting block and a second mounting block, wherein the first mounting block is disposed on one side of the bracket, and the main body is located between the first mounting block and the second mounting block, and the first mounting block and the second mounting block are detachably connected to cooperate in clamping the main body.

[0019] According to some embodiments of the present application, a detachable nozzle is provided at the end of the body.

[0020] The plasma spray gun according to the second embodiment of the present application includes: a main body and a second power connection head.

[0021] The body is configured to be detachably connected to the spraying device;

[0022] The body is electrically connected to the second electrical connector. An insert block and two second contacts are provided at one end of the second electrical connector. The insert block is located between the two second contacts. The distances between the insert block and the two second contacts are different.

[0023] The plasma spray gun according to the second embodiment of the present application has at least the following beneficial effects: the plasma spray gun of the present application is used to cooperate with the injection device to ionize the air to form plasma, and the main body is detachably connected to the bracket card of the injection device, so as to facilitate the disassembly and assembly of the main body; the second electrical connector is electrically connected to the power supply structure on the injection device, and is detachably connected to the first electrical connector on the power supply structure through the second electrical connector, so as to facilitate the disassembly and assembly of the second electrical connector, thereby making it easy to disassemble and assemble the plasma spray gun from the injection device to improve the adaptability of the injection device. In addition, the second contact is used to contact the first contact on the first electrical connector, so that the power supply structure supplies power to the main body through the second electrical connector, and by arranging an insert block between the two second contacts and making the distance between the insert block and the two second contacts different, the insert block can insulate the two second contacts and play a foolproof effect.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present application is further described below with reference to the accompanying drawings and embodiments, wherein:

[0026] Figure 1 A schematic structural diagram of a surface treatment device according to an embodiment of the first aspect of the present application;

[0027] Figure 2 for Figure 1 A schematic diagram of the connection between the first electrical connector and the second electrical connector;

[0028] Figure 3 for Figure 2 A cross-sectional view of the first electrical connector and the second electrical connector;

[0029] Figure 4 for Figure 2 A cross-sectional view of the second electrical connector;

[0030] Figure 5 for Figure 2 A cross-sectional view of the first electrical connector;

[0031] Figure 6 for Figure 2 A partial structural schematic diagram of the second electrical connector;

[0032] Figure 7 for Figure 2 Schematic diagram of the partial structure of the first electrical connector.

[0033] Reference numerals:

[0034] Bracket 100;

[0035] First electrical connector 200, first connection hole 201, first contact 210, insertion slot 220, electrical connection slot 230, connection block 240, insertion port 241, insulating protrusion 250, protrusion 260, insertion chamber 270, first foolproof structure 280, protrusion 281, first clamping structure 290, clamping hook 291, clamping slot 291a;

[0036] Main body 300, electrical interface 301;

[0037] The second electrical connector 400, the second connecting hole 401, the plug block 410, the first side surface 411, the second side surface 412, the second contact 420, the second fool-proof structure 430, the fool-proof groove 431, the second clamping structure 440, and the clamping column 441;

[0038] The quick-change assembly 500 , the first mounting block 510 , and the second mounting block 520 . DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0040] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0041] In the description of this application, "several" means more than one, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0042] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0043] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0044] Reference Figure 1 According to the first aspect of the present application, the surface treatment device comprises: a spraying device and a spray gun.

[0045] Reference Figure 1 , Figure 3 , Figure 5 and Figure 7 The injection device includes a bracket 100 and a power supply structure; the power supply structure is provided with a first power connection head 200, and the first power connection head 200 is provided with two first contacts 210;

[0046] Reference Figure 1 , Figure 3 , Figure 4 and Figure 6 The spray gun includes a body 300 and a second electrical connector 400, the body 300 and the second electrical connector 400 are electrically connected, and the body 300 is detachably connected to the bracket 100; two second contacts 420 are provided at one end of the second electrical connector 400, and the second contacts 420 are in one-to-one contact with the first contacts 210, so that the power supply structure supplies power to the body 300. Thus, the body 300 can be easily disassembled from the spraying device to improve the versatility of the surface treatment device of the present application.

[0047] It is understandable that the main body 300 can be detachably connected to the bracket 100 on the spraying device. In addition, the main body 300 is electrically connected to the power supply structure on the spraying device through the second power connector 400. Thus, the spraying device is used to provide an installation position for the spray gun and to supply power to the spray gun. Specifically, when the first power connector 200 is plugged into the second power connector 400, the two second contacts 420 are also respectively in contact with a first contact 210, so that the power supply structure can supply power to the main body 300. Since the first power connector 200 is detachably connected to the second power connector 400, the main body 300 can be detachably connected to the power supply structure, so as to facilitate the replacement of the main body 300, so as to improve the versatility of the spraying device.

[0048] It should be noted that, in some examples, the bracket 100 is mounted on the housing of the injection device by means of screws or welding, and may also be a part of the housing of the injection device.

[0049] In order to improve the connection stability between the first electrical connector 200 and the second electrical connector 400, refer to Figure 1 , Figure 3 , Figure 4 and Figure 6 The first electrical connector 200 is provided with an insertion slot 220, and an insertion block 410 is provided at one end of the second electrical connector 400. The insertion block 410 is located between the two second contacts 420 and separates the two second contacts 420. The distance between the insertion block 410 and the two second contacts 420 is different, and the insertion block 410 is inserted into the insertion slot 220.

[0050] Specifically, when the first electrical connector 200 is plugged into the second electrical connector 400, the plug block 410 is inserted into the insertion slot 220.

[0051] It is understandable that the plug-in cooperation between the plug block 410 and the insertion slot 220 can play a limiting role, so that the first electrical connector 200 and the second electrical connector 400 are connected stably. In addition, it should be understood that the main body 300 needs to be connected to a high voltage to generate plasma. Therefore, in order to avoid leakage and arc between the two second electrical connectors 400, the plug block 410 is set between the two second contacts 420, and the plug block 410 can insulate the two second contacts 420. In addition, the distance between the plug block 410 and the two second contacts 420 is different, and accordingly, the distance between the two electrical connection slots 230 and the insertion slot 220 is different. When the plug block 410 is inserted in an incorrect direction, it will not be inserted into the insertion slot 220, so that the first electrical connector 200 and the second electrical connector 400 cannot be docked, thereby playing a foolproof effect.

[0052] Regarding the distance between the plug block 410 and the second contact 420, refer to Figure 3 , Figure 4 and Figure 6 In this embodiment, the plug block 410 has two opposite sides facing the two second contacts 420 respectively, and the vertical distance between the side facing the second contacts 420 on the plug block 410 and the second contacts 420 corresponding to the side is the distance between the plug block 410 and the second contacts 420. Specifically, the plug block 410 includes an opposite first side surface 411 and a second side surface 412, the first side surface 411 and the second side surface 412 respectively facing the two second contacts 420, the distance between the first side surface 411 and the second contacts 420 facing the first side surface 411 is a, and the distance between the second side surface 412 and the second contacts 420 facing the second side surface 412 is b, and a≠b.

[0053] For example, the plug block 410 is a cuboid, and the length direction of the plug block 410 is perpendicular to the line between the two second contacts 420 , and the two opposite sides of the plug block 410 in the width direction are the first side surface 411 and the second side surface 412 .

[0054] In some other embodiments, the plug block 410 may also be other symmetrical structures, and the vertical distance between the symmetry line of the plug block 410 and the second contact 420 is defined as the distance between the plug block 410 and the second contact 420. In order to ensure the insulation effect of the plug block 410, along the direction from the second contact 420 to the other second contact 420, the projection of the second contact 420 falls within the projection on the plug block 410, so as to ensure that the plug block 410 can block the two second contacts 420.

[0055] In order to improve the connection stability between the first electrical connector 200 and the second electrical connector 400, refer to Figure 3 , Figure 5 and Figure 7In this embodiment, the first electrical connector 200 is formed with two electrical connection slots 230 . Each electrical connection slot 230 contains a first contact 210 , and the second contact 420 is inserted into the electrical connection slot 230 .

[0056] It can be understood that the second contacts 420 protrude from the outer surface of the second terminal 400, and the first contacts 210 are accommodated in the connection slots 230. When the first terminal 200 and the second terminal 400 are connected, each second contact 420 will be inserted into one of the connection slots 230 and contact the first contact 210 in the connection slots 230. Therefore, the connection stability between the second terminal 400 and the first terminal 200 is improved by plugging and matching the second contacts 420 and the connection slots 230.

[0057] In other embodiments, the second electrical connector 400 may form a connection slot 230 , the second contact 420 may be accommodated in the connection slot 230 , and the first contact 210 may be inserted into the connection slot 230 to connect with the second contact 420 in the connection slot 230 .

[0058] It should be noted that the first contact 210 is a metal column with a long length. In order to reduce the volume of the first contact 200, the first contact 200 includes a connecting block 240, an insulating protrusion 250 and two protrusions 260. The insulating protrusion 250 and the two protrusions 260 are connected to one side of the connecting block 240, and the insulating protrusion 250 is located between the two protrusions 260. Each connecting slot 230 penetrates the connecting block 240 and a corresponding protrusion 260, so that an insertion port 241 is formed on the side of the connecting block 240 away from the protrusion 260. The second contact 420 is inserted into the connecting slot 230 through the insertion port 241, and the first contact 210 is at least partially located in the protrusion 260 through the connecting slot 230.

[0059] It is understandable that a protrusion 260 corresponding to the first contact 210 is provided on the connection block 240 , and a portion of the first contact 210 is accommodated by the protrusion 260 , so as to reduce the volume of the first contact 200 .

[0060] It should also be noted that, since the protrusion 260 protrudes from the outer surface of the connection block 240, and the first contact 210 is partially located in the protrusion 260, in order to avoid leakage between the two first contacts 210, an insulating protrusion 250 is provided on the connection block 240, and the insulating protrusion 250 is located between the two protrusions 260, so that the insulating protrusion 250 blocks the two first contacts 210. In addition, the insulating protrusion 250 can dock with the positioning groove on the injection device, thereby facilitating the installation and positioning of the first contact 200.

[0061] Specifically, the connection block 240 is used as a main body connected to the second electrical connector 400 , that is, the second electrical connector 400 is connected to the connection block 240 , and the second contact 420 is inserted into the electrical connection slot 230 from the insertion port 241 of the connection block 240 .

[0062] In order to improve the connection stability between the first electrical connector 200 and the second electrical connector 400, refer to Figures 3 to 5 The first electrical connector 200 forms an insertion chamber 270, the insertion groove 220 is opened on the bottom wall of the insertion chamber 270, the second electrical connector 400 is plugged into the insertion chamber 270, the inner wall of the insertion chamber 270 is provided with a first fool-proof structure 280, and the outer wall of the second electrical connector 400 is provided with a second fool-proof structure 430. The first fool-proof structure and the second fool-proof structure are plugged together to enable the second electrical connector 400 to be inserted into the insertion chamber 270 in the correct direction.

[0063] For example, when the second connector 400 is inserted into the insertion chamber 270 in the correct direction, the first fool-proofing structure 280 is plugged into and matched with the second fool-proofing structure 430; when the second connector 400 is inserted into the insertion chamber 270 in an incorrect manner, the end of the first connector 200 abuts against the second fool-proofing structure 430 / the end of the second connector 400 abuts against the first fool-proofing structure 280 to prevent the second connector 400 from entering the insertion chamber 270.

[0064] It is understandable that when the first connector 200 and the second connector 400 are connected, the end of the second connector 400 having the plug 410 will be inserted into the insertion slot 220 , and the second contact 420 will abut against the first contact 210 on the bottom wall of the insertion slot 220 .

[0065] It should be noted that the two first contacts 210 and the two second contacts 420 have positive and negative poles respectively. In order to avoid the second contact 400 from being inserted in the wrong direction and affecting the power supply, refer to Figure 6 and Figure 7 By providing a first foolproof structure 280 on the inner side wall of the insertion chamber 270 and a second foolproof structure 430 on the outer side wall of the second contact 400, when the second contact 400 is inserted into the insertion chamber 270 in the correct direction, the first foolproof structure 280 can slide and cooperate with the second foolproof structure 430, so that the second contact 400 can be inserted into the insertion chamber 270. Conversely, when the second contact 400 is inserted into the insertion chamber 270 in the wrong way, the end of the first contact 200 abuts against the second foolproof structure 430 / the end of the second contact 400 abuts against the first foolproof structure 280, so as to prevent the second contact 400 from entering the insertion chamber 270. Thereby, the first contact 210 and the second contact 420 are ensured to be connected in the correct direction to ensure normal power supply.

[0066] It should be noted that the correct direction means that after the first contact 200 and the second contact 400 are connected, the positive and negative poles of the first contact 210 and the positive and negative poles of the second contact 420 are correctly connected. Conversely, the wrong direction means that the positive and negative poles of the first contact 210 and the positive and negative poles of the second contact 420 do not correspond.

[0067] Specifically, the power connection slot 230 is also formed on the bottom wall of the insertion chamber 270 .

[0068] For the specific structure of the first foolproof structure 280, refer to Figure 6 and Figure 7 In this embodiment, the first fool-proofing structure 280 includes a plurality of ridges 281, and the ridges 281 are arranged on two opposite inner side walls of the insertion chamber 270, and the number of ridges 281 on the two opposite inner side walls of the insertion chamber 270 is different; the second fool-proofing structure 430 is a fool-proofing groove 431 formed on two opposite outer side walls of the second electrical connector 400, and the ridges 281 correspond to the fool-proofing groove 431 one by one.

[0069] It is understandable that, since the number of ridges 281 on the two opposite inner side walls of the insertion chamber 270 is inconsistent, and the foolproof groove 431 is arranged corresponding to the ridges 281, when the second electrical connector 400 enters the insertion chamber 270 in the correct direction, the ridges 281 will slide relative to the foolproof groove 431. Conversely, when the second electrical connector 400 enters the insertion chamber 270 in the wrong way, the ridges 281 will not be aligned with the foolproof groove 431, and the ridges 281 will abut against the end of the second electrical connector 400.

[0070] In some other embodiments, the number of the convex strips 281 included in the first foolproof structure 280 may also be one, and the second foolproof structure 430 may include one foolproof groove 431, so the number of the convex strips 281 and the foolproof groove 431 may not be limited. For another example, the convex strips 281 may also be located on any two inner side walls of the insertion chamber 270, so the location of the convex strips 281 may not be limited. For another example, the second power connection slot 230 includes the convex strips 281, and the first power connection slot 230 is the foolproof groove 431 set on the side wall of the insertion chamber 270.

[0071] In order to lock the first electrical connector 200 and the second electrical connector 400, refer to Figure 2 and Figure 3 A first clamping structure 290 is disposed on the outer side of the first electrical connector 200 , and a second clamping structure 440 is disposed on the outer side of the second electrical connector 400 . The first clamping structure 290 is clamped with the second clamping structure 440 .

[0072] It is understandable that after the first terminal 200 and the second terminal 400 are docked, the first clamping structure 290 can be clamped with the second clamping structure 440 to lock the first terminal 200 and the second terminal 400 to prevent the first terminal 200 and the second terminal 400 from being loosened. When the first terminal 200 and the second terminal 400 need to be disassembled, the clamping cooperation between the first clamping structure 290 and the second clamping structure 440 can be released to allow the first terminal 200 and the second terminal 400 to be separated.

[0073] Regarding the specific forms of the first clamping structure 290 and the second clamping structure 440:

[0074] In this embodiment, the first engaging structure 290 is a hook 291, and the second engaging structure 440 is a post 441. The hook 291 is formed with a slot 291a, and the post 441 is engaged in the slot 291a. The slot wall of the slot 291a abuts against the side of the post 441 away from the first terminal 200, and can provide a locking force to the post 441 toward the first terminal 200; the hook 291 is rotatably connected to the first terminal 200, and the post 441 can be engaged in or disengaged from the slot 291a by rotating the hook 291.

[0075] It is understandable that, after the first electrical connector 200 and the second electrical connector 400 are docked, the hook 291 can be rotated so that the hook 291 is engaged with the post 441, so as to achieve the locking of the first electrical connector 200 and the second electrical connector 400. Moreover, after the hook 291 is engaged with the post 441, the slot wall of the slot 291a of the hook 291 will abut against the post 441, and the position where the slot wall of the slot 291a abuts against the post 441 and the position where the hook 291 is rotatably connected to the first electrical connector 200 are respectively located on both sides of the post 441, and the slot wall of the slot 291a squeezes the post 441, which will give the post 441 a force toward the position where the hook 291 is rotatably connected to the first electrical connector 200, so that the post 441 has a tendency to move toward the first electrical connector 200, so that the second electrical connector 400 and the first electrical connector 200 are more tightly connected.

[0076] In some other embodiments, the first clamping structure 290 may be a clamping column 441 fixed to the first electrical connector 200, and the second clamping structure 440 may be a clamping hook 291 rotatably connected to the second electrical connector 400. In addition, in some embodiments, both the first clamping structure 290 and the second clamping structure 440 are rotatable clamping hooks 291, and the two clamping hooks 291 are clamped to each other.

[0077] In order to further lock the first electrical connector 200 and the second electrical connector 400, refer to Figure 4 and Figure 5A first connection hole 201 is formed on the outer circumference of the first terminal 200, and a second connection hole 401 is formed on the outer circumference of the second mounting block 520. The first connection hole 201 and the second connection hole 401 are used to pass fasteners to lock the first terminal 200 and the second terminal 400.

[0078] It is understandable that when the first connection head 200 and the second connection head 400 are connected, the first connection hole 201 corresponds to the second connection hole 401, and the first connection hole 201 and the second connection hole 401 are penetrated by the fastener, so that the first connection head 200 and the second connection head 401 are locked. Specifically, the fastener is threadedly connected to the first connection hole 201 and the second connection hole 401.

[0079] Regarding the connection method of the second power connector 400 and the body 300, in this embodiment, the second power connector 400 and the body 300 are connected via a power cord. Figure 1 The main body 300 is provided with an electrical interface 301, and one end of the power cord connected to the main body 300 is provided with a conductive column (not shown in the figure), which is plugged into the electrical interface 301 so that one end of the power cord can be detachably connected to the main body 300, so as to facilitate quick disassembly and assembly of the second power connector 400 and the main body 300.

[0080] In other embodiments, one end of the power cord may also be welded to the wires in the body 300 .

[0081] In order to realize the detachable connection between the body 300 and the bracket 100, refer to Figure 1 The surface treatment device of the present application also includes a quick-change assembly 500, which includes a first mounting block 510 and a second mounting block 520. The first mounting block 510 is arranged on one side of the bracket 100, and the main body 300 is located between the first mounting block 510 and the second mounting block 520. The first mounting block 510 and the second mounting block 520 are detachably connected to cooperate with the clamping body 300.

[0082] It can be understood that the first mounting block 510 is fixed on the bracket 100, the body 300 is located between the first mounting block 510 and the second mounting block 520, and the body 300 is clamped by the first mounting block 510 and the second mounting block 520 so that the body 300 is installed on the bracket 100. In addition, since the first mounting block 510 and the second mounting block 520 are detachably connected, the second mounting block 520 can be removed to facilitate the disassembly and assembly of the body 300.

[0083] Specifically, in this embodiment, screw holes are formed on the first mounting block 510 and the second mounting block 520, and screws are passed through the screw holes on the first mounting block 510 and the second mounting block 520 to lock the first mounting block 510 and the second mounting block 520. In some other embodiments, the first mounting block 510 and the second mounting block 520 can also be connected or plugged into each other.

[0084] Furthermore, in order to better fix the main body 300 by the first mounting block 510 and the second mounting block 520, the main body 300 is roughly cylindrical, and arc-shaped grooves are formed on the opposite sides of the first mounting block 510 and the second mounting block 520. When the first mounting block 510 and the second mounting block 520 clamp the main body 300, the groove wall of the arc-shaped groove can be close to the outer wall of the main body 300.

[0085] According to some embodiments of the present application, a detachable nozzle is provided at the end of the body 300, so that the nozzle can be quickly disassembled and installed to replace different types of nozzles.

[0086] The plasma spray gun according to the second embodiment of the present application includes: a main body 300 and a second power connection head 400.

[0087] The body 300 is configured to be detachably connected to the spraying device;

[0088] The second connector 400 is electrically connected to the body 300 . An insert block 410 and two second contacts 420 are disposed at one end of the second connector 400 . The insert block 410 is located between the two second contacts 420 . The distances between the insert block 410 and the two second contacts 420 are different.

[0089] It can be understood that the plasma spray gun of the present application is used to cooperate with the injection device to ionize the air to form plasma, and the body 300 is detachably connected to the bracket 100 of the injection device, so as to facilitate the disassembly and assembly of the body 300; the second electrical connector 400 is electrically connected to the power supply structure on the injection device, and is detachably connected to the first electrical connector 200 on the power supply structure through the second electrical connector 400, so as to facilitate the disassembly and assembly of the power cord, thereby enabling the plasma spray gun to be easily disassembled from the injection device to improve the versatility of the injection device. Thus, the injection device is used to provide an installation position for the spray gun and to supply power to the spray gun. In addition, the second contact 420 is used to contact the first contact 210 on the first electrical connector 200, so that the power supply structure supplies power to the body 300 through the second electrical connector 400, and by arranging the plug block 410 between the two second contacts 420, and making the distance between the plug block 410 and the two second contacts 420 different, the plug block 410 can insulate the two second contacts 420 and play a foolproof effect.

[0090] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A surface treatment device, characterized in that: include: An injection device, comprising a bracket (100) and a power supply structure; The power supply structure is provided with a first power connector (200), and the first power connector (200) is provided with two first contacts (210); A spray gun, comprising a body (300) and a second power connector (400), wherein the body (300) is electrically connected to the second power connector (400), and the body (300) is detachably connected to the bracket (100); two second contacts (420) are provided at one end of the second power connector (400), and the second contacts (420) are in one-to-one contact with the first contacts (210), so that the power supply structure supplies power to the body (300).

2. The surface treatment device according to claim 1, characterized in that: The first electrical connector (200) is provided with an insertion slot (220), and one end of the second electrical connector (400) is provided with an insertion block (410), the insertion block (410) is located between the two second contacts (420) and separates the two second contacts (420), the distance between the insertion block (410) and the two second contacts (420) is different, and the insertion block (410) is inserted into the insertion slot (220).

3. The surface treatment device according to claim 2, characterized in that: The plug block (410) comprises a first side surface (411) and a second side surface (412) opposite to each other, the first side surface (411) and the second side surface (412) respectively facing two second contacts (420), the distance between the first side surface (411) and the second contacts (420) facing the first side surface (411) is a, the distance between the second side surface (412) and the second contacts (420) facing the second side surface (412) is b, and a≠b.

4. The surface treatment device according to claim 1, characterized in that: The first electrical connector (200) is formed with two electrical connection slots (230), each of the electrical connection slots (230) contains a first contact (210), and the second contact (420) is inserted into the electrical connection slot (230).

5. The surface treatment device according to claim 4, characterized in that: The first electrical connector (200) comprises a connection block (240), an insulating protrusion (250) and two protrusions (260); the insulating protrusion (250) and the two protrusions (260) are connected to one side of the connection block (240), and the insulating protrusion (250) is located between the two protrusions (260); each of the electrical connection slots (230) penetrates the connection block (240) and a corresponding protrusion (260), so that an insertion port (241) is formed on a side of the connection block (240) away from the protrusion (260); the second contact (420) is inserted into the electrical connection slot (230) through the insertion port (241); and the first contact (210) is at least partially located in the protrusion (260) through the electrical connection slot (230).

6. The surface treatment device according to claim 2, characterized in that: The first electrical connector (200) forms an insertion chamber (270), the insertion groove (220) is opened on the bottom wall of the insertion chamber (270), the second electrical connector (400) is plugged into the insertion chamber (270), the inner wall of the insertion chamber (270) is provided with a first fool-proof structure (280), the outer wall of the second electrical connector (400) is provided with a second fool-proof structure (430), the first fool-proof structure and the second fool-proof structure are plugged into each other, so that the second electrical connector (400) is inserted into the insertion chamber (270) in a correct direction.

7. The surface treatment device according to claim 6, characterized in that: The first fool-proofing structure (280) includes a plurality of convex strips (281), and the convex strips (281) are arranged on two opposite inner side walls of the insertion chamber (270), and the number of convex strips (281) on the two opposite inner side walls of the insertion chamber (270) is different; the second fool-proofing structure (430) is a fool-proofing groove (431) formed on two opposite outer side walls of the second electrical connector (400), and the convex strips (281) correspond to the fool-proofing groove (431) one by one.

8. The surface treatment device according to claim 1, characterized in that: A first clamping structure (290) is arranged on the outer side of the first electrical connector (200), and a second clamping structure (440) is arranged on the outer side of the second electrical connector (400); the first clamping structure (290) is clamped with the second clamping structure (440).

9. The surface treatment device according to claim 8, characterized in that: The first clamping structure (290) is a clamping hook (291), and the second clamping structure (440) is a clamping column (441). The clamping hook (291) is formed with a clamping groove (291a), and the clamping column (441) is clamped in the clamping groove (291a). The groove wall of the clamping groove (291a) abuts against a side of the clamping column (441) away from the first electrical terminal (200), and can provide a locking force to the clamping column (441) in the direction of the first electrical terminal (200); the clamping hook (291) is rotatably connected to the first electrical terminal (200), and the clamping column (441) can be clamped into or detached from the clamping groove (291a) by rotating the clamping hook (291).

10. The surface treatment device according to any one of claims 1 to 9, characterized in that: The quick-change assembly (500) further comprises a first mounting block (510) and a second mounting block (520), wherein the first mounting block (510) is arranged on one side of the bracket (100), and the body (300) is located between the first mounting block (510) and the second mounting block (520), and the first mounting block (510) and the second mounting block (520) are detachably connected to cooperate in clamping the body (300).

11. The surface treatment device according to claim 1, characterized in that: A detachable nozzle is provided at the end of the body (300).

12. A plasma spray gun, characterized in that include: A body (300), wherein the body (300) is configured to be detachably connected to a bracket (100) of a spraying device; A second electrical connector (400), the body (300) being electrically connected to the second electrical connector (400), an insert block (410) and two second contacts (420) being provided at one end of the second electrical connector (400), the insert block (410) being located between the two second contacts (420), and the distances between the insert block (410) and the two second contacts (420) being different.

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