CN2300476Y

CN2300476Y - Smoke suction type gas shielded welding gun

Info

Publication number: CN2300476Y
Application number: CN 97234279
Authority: CN
Inventors: 沈政达
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-06-18
Filing date: 1997-04-14
Publication date: 1998-12-16
Anticipated expiration: 2007-04-14

Abstract

The utility model relates to a smoke suction type welding gun, which is suitable for various gas shielded welding methods and is used for sucking the smoke generated during the welding. The end part of the welding gun is provided with a smoke sucking cover which can cover the front upper part of an arc region, so the smoke suction is sufficient, and the sucked smoke flow passes through the inner part of the welding gun. The middle part of a gun handle is provided with an aperture, a thermal insulation sleeve is arranged out of the gun handle with an interval. By using the negative pressure in the gun body, air at room temperature can be compelled to flow to the middle part from both ends of the thermal insulation sleeve, so the temperature at the handle part can be reduced. The utility model adopts a negative pressure pump which takes compressed air as motive power for sucking welding smoke, and the gun body is provided with an electric appliance switch used for controlling a wire feeder to move and a hook used for suspending the welding gun.

Description

The smoking-collecting type gas protective welding gun

The utility model be a kind of can the suction strainer weld fumes, go for the smoking-collecting type welding gun of various lazy, active gas shielded arc weldings.

The environmental pollution that weld fumes causes is an insoluble problem always.De Guo TB-Welding Technology Co., Ltd has released TBA series smoking-collecting type welding gun in recent years, and the ESAB company of Sweden has released PSF series smoking-collecting type welding gun.These two kinds of welding gun structures are similar substantially, and the flue gas of suction all passes through from the rifle body inside of hollow, and smoking port is all opened in distance tip end to be had on the conical surface of taper smoking casing end of certain distance.But in the actual welding process, the red-hot flue gas that the arc district produces be to float towards the front upper place in arc district, and the smoking port of above-mentioned two kinds of welding guns is all opened in the back upper place in arc district, so smoking efficient is lower under the purging effect of protection air-flow.Press that utility model patent CN85 2 01640 U make the smoking-collecting type welding gun, though there is not this shortcoming, part also still has some deficits.The first, the change in flow of smoking air-flow can influence welding quality in the smoking-collecting type welding gun, but in the negative pressure pump of pressing the jet current principle design, the flow velocity of smoking air-flow changes along with the pressure (pressure of work workshop compressed air piping) of working air current, because lack the pressure regulation link in the negative pressure pump of this welding gun, so can not keep the stable of smoking air-flow velocity.The second, according to the smoking-collecting type welding gun that CN85 2 01640 U utility model patents are made, the structure of dirt catcher is huger, moves difficulty, can not adapt to the requirement of mobile operating.The 3rd, in order can to absorb flue gas and don't to siphon away protective gas, so the position of smoking port wants high, and it is big that area is wanted, can cover to the front upper place in arc district, simultaneously also otherwise retaining hinders the operator to observe the sight line of melt pool.And the smoking port of the range hood of the smoking-collecting type welding gun of making according to CN85 2 01640 U utility model patents only is a circular configuration, just can not fully solve this contradiction.The 4th, be surrounded by one deck thermal boundary barrier film and one deck collet on the pikestaff according to the smoking-collecting type welding gun of CN85 2 01640 U utility model patent manufacturings, cause the pikestaff structure thick, be not easy to the operator and hold use, facts have proved that this thermal boundary barrier film can cancel.

The purpose of this utility model provides a kind of, be convenient to mobile operating, can improve absorb flue gas efficient, negative pressure pump and dirt catcher structure be light and handy, the rifle body is time spent smoking-collecting type welding gun that can hang, that can stablize the smoking air-flow velocity not.

The design feature of the utility model gas protective welding gun is; first; with workshop compressed air commonly used is the power source of suction flue dust; be combined into one and form by pressure regulator, Pressure gauge, the negative pressure pump housing, muffler, dirt catcher by penetrating the negative pressure pump of inhaling the principle design; the effect of pressure regulator is the compressed air that the pressure from the workshop pipeline is changed at any time, thereby obtains stable smoking negative pressure with the center of weighing the pressure directive negative pressure pump housing fixed.Because the pneumatic noise of jet absorption type negative pressure pump is very big, therefore a muffler must be set at the air flow outlet of the negative pressure pump housing.The structure of dirt catcher can adopt multiple versions (division is stated in addition) such as pocket type, magnetic-type according to what and character of fume amount, since this negative pressure pump in light weight, volume is little, therefore it can be fixed on needs fixing optional position, even can be combined into one it and wire-feed motor mobile at any time, do not have moving component owing to this negative pressure pump in addition, so long being convenient to of life-span keeped in repair.Second; for reach the smoking port that makes range hood can either cover to the front upper place in arc district, can keep protective gas not to be sucked away again; also however the retaining hinder the operator to observe the sight line in molten bath; and the requirement that can adapt to different weldment construction characteristics; therefore the range hood of the utility model welding gun has multiple version and size; in order to selecting for use; and its common characteristic is; the contoured surface of the smoking port of various range hoods also has structural shape (see figure 3)s such as avette or flat except that circle, tight-lipped little circular arc one side by range hood of the rifle of welding gun.The axis bevel of the contoured surface of the smoking port of range hood and range hood, or stepped (see figure 4).The 3rd, the operator changes the position of range hood and adjusting range hood for convenience, and the utility model welding gun has adopted the frame mode with lock sleeve locking range hood, all motions that only just can pin range hood with a screw.The 4th, be provided with at the front end of the collet of rifle body and be used to control that wire-feed motor moves or cantilever hangs the electric control switch of rotation, can put down welding gun, adjust wire-feed motor at any time or cantilever winches to the optimum position.The 5th, be provided with the hook (see figure 1) at the front end of welding gun rifle body, in order to hang welding gun, help civil operation.The 6th, the pikestaff outside of the utility model welding gun has only coated one deck collet.

Because to make this welding gun reach smoking abundant, in light weight, easy to use, with low cost for above feature, purpose such as help carrying out production strictly in line with rules and regulations.

Below in conjunction with drawings and Examples the utility model is further specified.

Accompanying drawing has been described an embodiment of the present utility model.

Fig. 1 is the figure of a kind of embodiment of the on-the-spot installation situation of the utility model welding gun.

Fig. 2 is the profile graphics of a kind of embodiment of the utility model welding gun lance body structure.

Fig. 3 is the end view of avette and flat smoking port of the range hood of the utility model welding gun.

Fig. 4 is the figure of a kind of embodiment of stepped smoking port.

Fig. 5 is the profile graphics of a kind of embodiment of the lock sleeve of the utility model welding gun.

Fig. 6 is the profile graphics of a kind of embodiment of employing coupling sleeve structure.

The hollow housing (see figure 2) of the rifle body (1) of the utility model welding gun for making with insulating materials.From various pipelines (3) such as the protective gas conduit (see figure 1) of wire-feed motor (2), wire-feeding pipe, cable, control lines; after by divided flow box (4) and smoke removal conduit (5); enter the rifle body (1) of welding gun; and the rear portion of contiguous block (6) (see figure 2) inner with being fixed on rifle body (1) links to each other; the front portion of contiguous block (6) then links to each other with the afterbody of contact tube (7); the front portion of contact tube (7) links to each other with rifle mouth (8), constitutes the passage of protective gas, electric current and welding wire.The intracavity section of divided flow box (4), smoke removal conduit (5) and rifle body (1) all leaves suitable space to allow flue gas stream pass through except that by the various pipelines (3).The outlet of divided flow box (4) bypass is connected with the inlet of leading smoke pipe (9), and the outlet of leading smoke pipe (9) links to each other with the negative pressure pump (10) of jet type, changes to lead the length of smoke pipe (9), and negative pressure pump (10) is installed in needs fixing optional position.The utility model smoking-collecting type gas protective welding gun is characterized in that negative pressure pump (10) is combined into one by pressure regulator (11), Pressure gauge (27), the jet absorption type negative pressure pump housing (12), muffler (13), dirt catcher parts such as (14), and compact conformation, weight are light and handy.The structure (division is stated in addition) of dirt catcher (14) can adopt multiple versions such as pocket type or magnetic-type according to what and character of fume amount.A kind of assembling form of negative pressure pump shown in Figure 1 (10) when adopting bag dust filter (14), the flue gas bag dust filter (28) of flowing through, flue dust is just by filtering.For the smoking port that satisfies range hood (15) can either cover to the front upper place in arc district, reach protective gas and be not sucked away, do not keep off and hinder operator's sight line, can adapt to the requirement of different weldment construction characteristics again; therefore range hood (15) must have multiple version and size; in order to selecting for use; its common characteristic is; first; the contoured surface of the smoking port of various range hoods is avette in addition (24) or flat structural shape (see figure 3)s such as (25) except that circle, and the rifle mouth (8) of welding gun is near little circular arc one side of range hood.The second, the axis bevel of the contoured surface of the smoking port of range hood (15) and range hood (15) also can be made smoking port stepped (26) (see figure 4) according to the design feature of workpiece.Range hood (15) is that the inner surface of range hood (15) is enclosed within (see figure 5) on the outer surface that has the sphere snap ring (18) of locking breach (16) and counterbore (17) with the connected mode of rifle body (1).Lock sleeve (19) is sleeved on (see figure 1) on the outer surface of range hood (15).Lock sleeve (19) is made up of clip (20), nut (21), screw (22).Screw (22) passes clip (20), nut (21), range hood (15) and heads in the counterbore (17) of sphere snap ring (18).Tighten screw (22), clip (20) outside tensioner under the promotion of nut (21), sphere snap ring (18) then inwardly produces strain under the promotion of screw (22), thus the fixing relative position between range hood (15) and the rifle body (1).According to the structure needs, can install an adapter sleeve (23) (see figure 6) additional at the front end of rifle body (1).Sphere snap ring (18) can be fastened on adapter sleeve (23) and go up (see figure 5), also can directly be fastened on the front end of rifle body (1).When moving of wire-feed motor (2); when adopting Motor Drive; for eliminating the operator suspends weld job because of the mobile wire-feed motor of needs (2) trouble; on the rifle body (1) of the utility model smoking-collecting type gas protective welding gun, be provided with and be used to control that wire-feed motor (2) moves or cantilever hangs electric control switch (31) (see figure 1) that rotate (30); the operator can put down welding gun, adjusts wire-feed motor (2) or cantilever at any time and hangs (30) to the optimum position.Front end at welding gun rifle body (1) is provided with hook (32) (see figure 1), in order to hang welding gun.Surface temperature for the position of shaking hands that reduces rifle body (1), be convenient to the operator and hold operation, the outside of the pikestaff of the utility model welding gun (33) is only left and has been coated one deck collet (29) with gap, and on pikestaff (33), have breeder tube (a 34) (see figure 2), thereby the air that makes room temperature is under the inner suction function of rifle body (1), to intermediate flow, play the effect of cooling collet (29) from the two ends of collet (29).

Claims

1. the rifle body (1) of the utility model welding gun is the hollow housing made from insulating materials; protective gas conduit from wire-feed motor (2); wire-feeding pipe; cable; various pipelines such as control line (3); after by divided flow box (4) and smoke removal conduit (5); enter the rifle body (1) of welding gun; and the rear portion of the contiguous block (6) inner with being fixed on rifle body (1) links to each other; the front portion of contiguous block (6) then links to each other with the afterbody of contact tube (7); the front portion of contact tube (7) links to each other with rifle mouth (8); the intracavity section of rifle body (1) is except that passing through various pipelines (3); all leave suitable space to allow flue gas stream pass through; it is the weld fumes suction strainer pump of power that the utility model smoking-collecting type gas protective welding gun can adopt with workshop compressed air commonly used; this suction strainer pump is by pressure regulator; Pressure gauge; the negative pressure pump housing; muffler; dirt catcher is combined into one and forms; the utility model smoking-collecting type gas protective welding gun is characterized in that: range hood (15) has multiple version and size; its common characteristic is; first; the structural shape of the contoured surface of the smoking port of various range hoods avette in addition (24) or flat (25) except that circle; the rifle mouth (8) of welding gun is near a side of the little circular arc of range hood; second; the axis bevel of the contoured surface of the smoking port of range hood (15) and range hood (15); also smoking port can be made stepped (26); range hood (15) with the connected mode of rifle body (1) is; lock sleeve (19) is sleeved on the outer surface of range hood (15); the inner surface of range hood (15) is enclosed within on the outer surface of the sphere snap ring (18) that has locking breach (16) and counterbore (17); can adorn an adapter sleeve (23) at the front end of rifle body (1); the inner surface of sphere snap ring (18) can be fastened on the adapter sleeve (23); also can directly be fastened on the front end of rifle body (1); lock sleeve (19) is by clip (20); nut (21); screw (22) is formed; screw (22) passes clip (20); nut (21); range hood (15) heads in the counterbore (17) of sphere snap ring (18); on the rifle body (1) of the utility model smoking-collecting type gas protective welding gun, can be provided with electric control switch (31); front end at the rifle body (1) of the utility model smoking-collecting type gas protective welding gun can be provided with hook (32); only leave in the outside of the pikestaff (33) of the utility model smoking-collecting type gas protective welding gun and to have coated one deck collet (29) with gap, and on the inner pikestaff (33) of collet (29), have breeder tube (34).

2. smoking-collecting type gas protective welding gun according to claim 1; it is characterized in that: range hood (15) has multiple version and size; its common characteristic is; first; the structural shape of the contoured surface of the smoking port of various range hoods avette in addition (24) or flat (25) except that circle, the rifle mouth (8) of welding gun is near a side of the little circular arc of range hood, second; the axis bevel of the contoured surface of the smoking port of range hood (15) and range hood (15) also can be made smoking port stepped (26).