Plasma cutting gun head

Abstract

The utility model discloses a plasma cutting gun head, which belongs to the technical field of plasma gun heads and comprises semi-arc plates mounted on two sides of the outer wall of the plasma cutting gun head, a dust collecting cover barrel is mounted at the bottoms of the semi-arc plates on two sides, and a plurality of dust inlets are arranged on the inner wall of the dust collecting cover barrel. A filter box is installed on the outer wall, close to the upper end, of the plasma cutting gun head, a connecting hose is connected between an air inlet of the filter box and the dust collection cover barrel, a tightening assembly is installed on the outer wall of the plasma cutting gun head, and when elastic telescopic rods on the two sides extend, U-shaped sliding blocks on the two sides in the tightening assembly can tighten the plasma cutting gun head. The U-shaped sliding blocks slide outwards in the sliding grooves and compress the reset springs, when the elastic telescopic rods contract under pressure, the reset springs on the two sides reset to enable the U-shaped sliding blocks on the two sides to move inwards at the same time, the connecting lantern rings move outwards through rotation of the connecting plates on the two sides, the connecting hose is pushed outwards, and the connecting hose is kept tight.

Description

Technical Field

[0001] The utility model belongs to the technical field of plasma gun heads, and in particular relates to a plasma cutting gun head. Background Art

[0002] The working principle of a plasma cutter is that plasma is a highly ionized gas heated to an extremely high temperature. It transfers the arc power to the workpiece, where the high heat melts the workpiece and blows it away, creating the plasma arc cutting process. Compressed air enters the torch and is distributed by the gas chamber into two paths: plasma gas and auxiliary gas. The plasma gas arc melts the metal, while the auxiliary gas cools the various components of the torch and blows away the molten metal.

[0003] In steel structure production workshops, a large number of steel plate components need to be cut. Currently, flame cutting and plasma cutting are the most commonly used cutting methods in production workshops. The gun head of the plasma cutting gun will produce a lot of smoke during high-voltage pulse cutting. The original environmental protection equipment (that is, the related dust collection equipment) is installed about two meters above the cutting machine frame. When the smoke rises to the top, it is basically dispersed and the smoke cannot be effectively recovered. Therefore, it is necessary to install a dust collection device on the plasma cutting gun head.

[0004] For example, Chinese utility model patent CN220480522U discloses a dust collecting mechanism for a plasma cutting gun head, comprising a dust collecting hood tube, which is mounted on the gun head of the plasma cutting gun. A dust collecting hose is connected to the side wall of the dust collecting hood tube, and a dust collecting blower is connected to the end of the dust collecting hose. The dust collecting blower is placed on the frame of the plasma cutting machine, and the air outlet of the dust collecting blower is connected to a set of filtering exhaust mechanisms through an exhaust duct. The utility model realizes the collection of smoke and dust starting from the gun head of the plasma cutting gun, which does not affect the normal operation of the plasma cutting machine, but can quickly collect smoke and dust, prevent smoke and dust from being emitted into the surrounding environment, and greatly improves the working environment around the cutting site.

[0005] Although the above-mentioned prior art can collect smoke and dust, the dust collecting hose between the dust collecting hood barrel and the dust collecting blower will be dragged for a long time. Therefore, when the plasma cutting machine is performing a cutting operation, a high temperature will be generated, which may easily cause the hose to be damaged and make it impossible to collect dust. Utility Model Content

[0006] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0007] In order to solve the problem proposed in the above background technology that the dust collection hose between the dust collection hood barrel and the dust collection fan will be dragged for a long time, so when the plasma cutting machine is performing cutting operations, a higher temperature will be generated, which may easily cause the hose to be damaged and the dust cannot be collected, the utility model adopts the following technical solution.

[0008] A plasma cutting gun head comprises semi-arc plates installed on both sides of the outer wall of the plasma cutting gun head, a dust hood barrel is installed at the bottom of the semi-arc plates on both sides, the inner wall of the dust hood barrel is provided with multiple dust inlets, a filter box is installed on the outer wall near the upper end of the plasma cutting gun head, a mounting bracket is installed at the bottom of the filter box, the mounting bracket is detachably connected to the outer wall of the plasma cutting gun head, the filter box has built-in exhaust fan and filter element, a connecting hose is connected between the air inlet of the filter box and the dust hood barrel, and a tightening assembly is installed on the outer wall of the plasma cutting gun head, the tightening assembly ensures that the connecting hose is always in a tight state.

[0009] Preferably, the outer walls of both sides of the semi-arc plates are fixedly connected with protruding plates, and the protruding plates opposite to each other are attached and threadedly connected with fastening bolts for fixation.

[0010] Preferably, both sides of the upper end of the semi-arc plate are fixedly connected with front and rear connecting air pipes facing each other, the two connecting air pipes on each side pass through the semi-arc plates on both sides respectively, and the connecting hose is connected and communicated with each connecting air pipe.

[0011] Preferably, the outlet ends of the two connecting air pipes on each side are detachably connected to the first and second interfaces of the three-way joint, and the third interfaces of the three-way joints on both sides are detachably connected to the semi-arc tube. The outer wall of the semi-arc tube is provided with a connecting head, and one end of the connecting hose is connected to the connecting head.

[0012] Preferably, elastic telescopic rods are installed on both sides of the upper end of the dust collecting hood barrel, and the elastic telescopic rods on both sides have the force to extend outwards.

[0013] Preferably, a plurality of rubber balls are embedded in and rotatably connected to the bottom of the dust collecting hood barrel.

[0014] Preferably, the tensioning assembly includes a mounting block, a sliding groove, a U-shaped sliding block, a reset spring, a connecting plate and a connecting ring. The outer wall of the plasma cutting gun head is detachably connected to the mounting block, and the mounting block is provided with a sliding groove near the outer wall of the connecting hose. The inner wall of the sliding groove is fixedly connected to a sliding rod. The outer walls on both sides of the sliding rod are slidingly connected to the U-shaped sliding blocks. The openings of the U-shaped sliding blocks on both sides face the connecting hose. The openings of the U-shaped sliding blocks on both sides are rotatably connected to the connecting plates inclined to the connecting hose. The ends of the connecting plates on both sides are rotatably connected to the connecting rings. The connecting rings are sleeved on the outer wall of the connecting hose. Reset springs are sleeved on the outer walls of the sliding rod between the U-shaped sliding block and the sliding groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. When the elastic telescopic rods on both sides are extended, the U-shaped sliding blocks on both sides of the tensioning assembly slide outward in the sliding groove and compress the reset spring. When the elastic telescopic rods are compressed by pressure, the reset springs on both sides reset and make the U-shaped sliding blocks on both sides move inward at the same time. The connecting rings on both sides are moved outward by the rotation of the connecting plates on both sides to push the connecting hose outward, so that the connecting hose remains taut, thereby keeping the connecting hose taut at all times, and avoiding the connecting hose from being broken after being dragged for a long time and exposed to the high temperature of the welding position.

[0017] 2. The elastic telescopic rod is provided with an outward extending force to push the dust hood barrel outward, and each connecting air pipe moves on the semi-arc plates on both sides, so that the plasma cutting gun head can be observed through the gap between the dust hood barrel and the semi-arc plates after welding is completed. During welding, the plasma cutting gun head is pressed down to cause the elastic telescopic rods on both sides to contract, so that the dust hood barrel is close to the end of the plasma cutting gun head, so that the dust collection effect is better.

[0018] 3. The two connecting air pipes on both sides pass through the semi-arc plates and are connected by three-way joints, which can assist in fixing the semi-arc plates on both sides to the outer wall of the plasma cutting gun head. In addition, the setting of multiple connecting air pipes can make the dust collection range of the dust collecting hood barrel wider. By fastening the semi-arc plates on both sides by tightening bolts, the dust collecting device can be easily disassembled, which can be more convenient for maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a plasma cutting gun head in the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the dust hood barrel in the utility model;

[0021] Figure 3 This is a schematic diagram of the connecting ring structure in the utility model;

[0022] Figure 4 This is a schematic diagram of the bottom structure of the dust hood barrel in the utility model;

[0023] Figure 5 This is a schematic diagram of the pressure direction when the connecting hose is tightened in the present invention.

[0024] The corresponding relationship between the illustration labels and component names in the figure is as follows:

[0025] 100. Plasma cutting gun head;

[0026] 200, semi-arc plate; 201, dust hood; 202, protruding plate; 203, fastening bolt; 204, connecting air pipe; 205, three-way joint; 206, semi-arc pipe; 207, connector; 208, elastic telescopic rod; 209, connecting hose; 210, mounting block; 211, sliding groove; 212, U-shaped sliding block; 213, return spring; 214, connecting plate; 215, connecting collar; 216, rubber ball bearing;

[0027] 300. Filter box; 301. Mounting bracket. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments. The present invention provides the following embodiments.

[0031] like Figure 1 As shown, it is a schematic diagram of the structure of a plasma cutting gun head according to a preferred embodiment of the present invention. The plasma cutting gun head of this embodiment includes semi-arc plates 200 installed on both sides of the outer wall of the plasma cutting gun head 100. Dust collecting hood barrels 201 are installed at the bottom of the semi-arc plates 200 on both sides. The inner wall of the dust collecting hood barrel 201 is provided with multiple dust inlets. A filter box 300 is installed on the outer wall of the plasma cutting gun head 100 near the upper end. A mounting bracket 301 is installed at the bottom of the filter box 300. The mounting bracket 301 is detachably connected to the outer wall of the plasma cutting gun head 100. The filter box 300 has a built-in exhaust fan and a filter element. In this embodiment, the semi-arc plate 200 wraps the gun head of the plasma cutting gun head 100, and the smoke is drawn into the filter element by the exhaust fan in the filter box 300 for filtration and then discharged outward, thereby achieving the effect of dust collection.

[0032] like Figure 2As shown, it is a schematic diagram of the dust hood barrel structure in this embodiment, the outer walls of the two sides of the semi-arc plates 200 are fixedly connected with protruding plates 202, the protruding plates 202 opposite to each other are fitted and threadedly connected with fastening bolts 203, and the upper ends of the semi-arc plates 200 are fixedly connected with front and rear opposite connecting air pipes 204, and the two connecting air pipes 204 on each side pass through the semi-arc plates 200 on both sides respectively, and the outgoing ends of the two connecting air pipes 204 on each side are detachably connected to the first and second interfaces of the three-way joints 205, and the third interfaces of the three-way joints 205 on both sides are detachably connected to the semi-arc pipe 2 06. The outer wall of the semi-arc tube 206 is provided with a connector 207, which is connected to the air inlet on the filter box 300. In this embodiment, the two connecting air pipes 204 on both sides pass through the semi-arc plate 200 respectively and are connected through the three-way joint 205, which can assist the semi-arc plates 200 on both sides to be fixed on the outer wall of the plasma cutting gun head 100, and the provision of multiple connecting air pipes 204 can make the dust collection range of the dust collecting hood barrel 201 wider, and the semi-arc plates 200 on both sides are fixed by tightening bolts 203, which can facilitate the disassembly of the dust collecting device and make maintenance and replacement more convenient.

[0033] like Figure 2 As shown, in order to enable better observation of the plasma cutting gun head 100 after welding is completed, in this embodiment, elastic telescopic rods 208 are installed on both sides of the upper end of the dust hood barrel 201. The elastic telescopic rods 208 on both sides have an outward extension force to push the dust hood barrel 201 to extend outward, and make each connecting air pipe 204 move on the semi-arc plates 200 on both sides, so that the plasma cutting gun head 100 can be observed through the gap between the dust hood barrel 201 and the semi-arc plates 200 after welding is completed. During welding, the plasma cutting gun head 100 is pressed down to cause the elastic telescopic rods 208 on both sides to contract, so that the dust hood barrel 201 is close to the end of the plasma cutting gun head 100, so that the dust collection effect is better.

[0034] like Figure 3 as well as Figure 5As shown, it is a schematic diagram of the connecting ring structure in this embodiment and a schematic diagram of the pressure direction when the connecting hose is tightened. The interior of the connecting head 207 is detachably connected to the connecting hose 209, and the connecting hose 209 is connected to the air inlet of the filter box 300. The outer wall of the plasma cutting gun head 100 is detachably connected to the mounting block 210. The mounting block 210 is provided with a sliding groove 211 near the outer wall of the connecting hose 209. The inner wall of the sliding groove 211 is fixedly connected to a sliding rod. The outer walls of the two sides of the sliding rod are slidably connected to U-shaped sliding blocks 212. The U-shaped sliding blocks 212 on both sides are fixed to the inner wall of the sliding rod. The opening of 12 faces the connecting hose 209, and the openings of the U-shaped sliding blocks 212 on both sides are rotatably connected to the connecting plates 214 inclined toward the connecting hose 209. The ends of the connecting plates 214 on both sides are rotatably connected to the connecting collars 215, and the connecting collars 215 are sleeved on the outer wall of the connecting hose 209. The outer walls of the sliding rods on both sides between the U-shaped sliding blocks 212 and the sliding grooves 211 are sleeved with return springs 213. In this embodiment, when the elastic telescopic rods 208 on both sides are extended, the connecting hose 209 is tightened to apply pressure to the connecting collars 215 (such as Figure 5 As shown in FIG, the U-shaped sliding blocks 212 on both sides slide outward inside the sliding groove 211 and compress the reset spring 213. When the elastic telescopic rod 208 is compressed by pressure, the reset springs 213 on both sides are reset, causing the U-shaped sliding blocks 212 on both sides to move inward at the same time. The rotation of the connecting plates 214 on both sides causes the connecting ring 215 to move outward to push the connecting hose 209 outward, so that the connecting hose 209 remains taut, thereby enabling the connecting hose 209 to always remain taut, thereby preventing the connecting hose 209 from being broken after being dragged for a long time and exposed to the high temperature of the welding position.

[0035] It is worth noting that the above-mentioned mounting block 210, sliding groove 211, U-shaped sliding block 212, return spring 213, connecting plate 214 and connecting ring 215 are the tensioning components in this embodiment. The tensioning components include but are not limited to the mounting block 210, sliding groove 211, U-shaped sliding block 212, return spring 213, connecting plate 214 and connecting ring 215. As long as it is a component that can keep the connecting hose 209 in a taut state at all times, it can be applied to this embodiment.

[0036] like Figure 4 As shown, it is a schematic diagram of the bottom structure of the dust hood barrel in this embodiment. A plurality of rubber balls 216 are embedded in the bottom of the dust hood barrel 201 and are rotatably connected. In this embodiment, the plurality of rubber balls 216 adaptively rotate as the plasma cutting gun head 100 moves when contacting the surface of the cutting piece, thereby reducing the friction between the bottom of the dust hood barrel 201 and the surface of the cutting piece, thereby extending the service life of the dust hood barrel 201.

[0037] The above content is a further detailed description of the present invention in combination with specific implementation methods. It cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as falling within the scope of protection determined by the claims submitted for the present invention.

Claims

1. A plasma cutting gun head, comprising semi-arc plates (200) mounted on both sides of the outer wall of the plasma cutting gun head (100), dust collecting barrels (201) mounted on the bottoms of the semi-arc plates (200) on both sides, and a plurality of dust inlets provided on the inner wall of the dust collecting barrel (201), characterized in that: A filter box (300) is installed on the outer wall of the plasma cutting gun head (100) near the upper end, and a mounting bracket (301) is installed at the bottom of the filter box (300). The mounting bracket (301) is detachably connected to the outer wall of the plasma cutting gun head (100). The filter box (300) has a built-in exhaust fan and a filter element. A connecting hose (209) is connected between the air inlet of the filter box (300) and the dust collecting hood barrel (201). A tightening component is installed on the outer wall of the plasma cutting gun head (100), and the tightening component keeps the connecting hose (209) in a tight state at all times.

2. The plasma cutting gun head according to claim 1, characterized in that: The outer walls of the two side semi-arc plates (200) are fixedly connected with protruding plates (202), and the protruding plates (202) on the two sides that are opposite to each other are attached and threadedly connected with fastening bolts (203) for fixing.

3. The plasma cutting gun head according to claim 2, characterized in that: Front and rear opposite connecting air pipes (204) are fixedly connected to both sides of the upper end of the semi-arc plate (200), and the two connecting air pipes (204) on each side pass through the semi-arc plates (200) on both sides respectively, and the connecting hose (209) is connected to and communicates with each connecting air pipe (204).

4. The plasma cutting torch head according to claim 3, characterized in that: The outlet ends of the two connecting air pipes (204) on each side are detachably connected to the first and second interfaces of the three-way joint (205), and the third interfaces of the three-way joints (205) on both sides are detachably connected to the semi-arc tube (206). The outer wall of the semi-arc tube (206) is provided with a connector (207), and one end of the connecting hose (209) is connected to the connector (207).

5. The plasma cutting torch head according to claim 4, characterized in that: Elastic telescopic rods (208) are installed on both sides of the upper end of the dust collecting hood barrel (201), and the elastic telescopic rods (208) on both sides have the force of extending outwards.

6. The plasma cutting torch head according to claim 5, characterized in that: A plurality of rubber balls (216) are embedded in and rotatably connected to the bottom of the dust collecting hood barrel (201).

7. The plasma cutting torch head according to claim 6, characterized in that: The tightening assembly includes a mounting block (210), a sliding groove (211), a U-shaped sliding block (212), a return spring (213), a connecting plate (214) and a connecting collar (215). The outer wall of the plasma cutting gun head (100) is detachably connected to the mounting block (210). The mounting block (210) is provided with a sliding groove (211) near the outer wall of the connecting hose (209). The inner wall of the sliding groove (211) is fixedly connected to a sliding rod. The outer walls of both sides of the sliding rod are slidably connected to the U-shaped sliding blocks (21 2), the openings of the U-shaped sliding blocks (212) on both sides face the connecting hose (209), the openings of the U-shaped sliding blocks (212) on both sides are rotatably connected to the connecting plates (214) inclined toward the connecting hose (209), the ends of the connecting plates (214) on both sides are rotatably connected to the connecting rings (215), the connecting rings (215) are sleeved on the outer wall of the connecting hose (209), and the outer walls of the two sides of the sliding rod between the U-shaped sliding blocks (212) and the sliding groove (211) are sleeved with return springs (213).

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