CN220050380U

CN220050380U - Gas welding gun

Info

Publication number: CN220050380U
Application number: CN202321416557.4U
Authority: CN
Inventors: 林宝忠; 陈斌; 邱伟凯
Original assignee: Excellent Electronic Xiamen Co ltd
Current assignee: Excellent Electronic Xiamen Co ltd
Priority date: 2023-06-06
Filing date: 2023-06-06
Publication date: 2023-11-21
Anticipated expiration: 2033-06-06

Abstract

The utility model discloses a gas welding gun, which comprises a gun body, a needle valve and an igniter, wherein the needle valve comprises a valve seat and a valve needle, the valve seat is arranged in the gun body, one end of the valve needle protrudes out of the surface of one side of the gun body and is provided with a knob, the igniter is provided with a button, and the button is arranged at the front end of the gun body and performs pressing action from front to back. The utility model has compact structure, can control ignition and flameout by single hand operation and adjust the flame size, is convenient to install, and has compact component connection and good sealing performance.

Description

Gas welding gun

Technical Field

The utility model relates to the field of welding guns, in particular to a gas welding gun.

Background

The gas welding gun is a common tool in welding tasks, and uses the high temperature generated after the gas and the combustion-supporting gas are mixed and ignited to melt the metal so as to fill the welding seam, and finally, different parts can be connected together after cooling. When the gas welding gun in the prior art is used, the gas welding gun needs to be held by one hand, the gas outlet amount is regulated by the other hand, for example, a self-ignition gas welding gun with the patent publication number of CN217433293U is used, a knob for regulating the gas outlet amount is arranged at the upper end of a gun handle, and when the gas welding gun is in operation, the gas welding gun is frequently touched by one hand, and the other hand is not empty, so that the gas welding gun cannot regulate the flame size at any time, and is inconvenient to operate.

Disclosure of Invention

The utility model aims to provide a gas welding gun so as to solve the problems.

For this purpose, the utility model adopts the following specific technical scheme:

the utility model provides a gas welding gun which comprises a gun body, a needle valve and an igniter, wherein the needle valve comprises a valve seat and a valve needle, the valve seat is arranged in the gun body, one end of the valve needle protrudes out of the surface of one side of the gun body and is provided with a knob, the igniter is provided with a button, and the button is arranged at the front end of the gun body and performs pressing action from front to back.

Further, the gun body is a handheld gun body, the knob is positioned at the left side of the gun body, the axial direction of the knob is perpendicular to the length direction of the gun body, and the button is positioned at the lower part of the front end of the gun body.

Further, the gun body inside still be equipped with rubber tube joint, connecting piece and rifle head, rubber tube joint's one end connect rubber tube, other end intercommunication disk seat, connecting piece's one end intercommunication disk seat, other end connect the rifle head, the front end of rifle head wear out the gun body front end, be equipped with the air vent on the connecting piece, connecting piece's internal passage passes through the air vent and communicates the gun body outside, the some firearm be arranged in connecting piece below and some firearm's lead wire extend to connecting piece's internal passage, connecting piece's internal passage be close to the one end of disk seat and be equipped with filter screen and air cock.

Further, the rear half part of the gun head is parallel to the gun body and is inserted into the gun body, and the front half part of the gun head is bent downwards and forms an included angle of 50 degrees with the rear part of the gun head.

Further, the gun body is formed by fixing left and right parts through screws after being spliced, and a plurality of ribs are arranged in the gun body and used for fixing a rubber tube joint, a valve seat, a connecting piece and a gun head.

Further, the gun body is provided with air suction holes at two sides of the gun head, and the air suction holes are communicated with the vent holes on the connecting piece.

Further, the number of the vent holes is set to be a plurality, and the vent holes are uniformly distributed along the circumference of the connecting piece.

Further, the needle valve also comprises a needle valve nut, a mounting hole is formed in the valve seat, one end of the needle valve, far away from the knob, is inserted into the mounting hole to form sealing fit with the mounting hole, the needle valve is rotatably fixed in the needle valve nut in a threaded joint mode, and the needle valve nut is fixed in the mounting hole in a threaded joint mode to be combined with the valve seat.

Further, the valve seat be equipped with first passageway, second passageway, third passageway, first cavity and second cavity, the opening of first cavity runs through the rear end face of valve seat, the front end that the rubber tube connects insert first cavity and form sealing fit with first cavity, the opening of second cavity runs through the front end face of valve seat, the rear end of connecting piece insert in the second cavity and form sealing fit with the second cavity, first cavity intercommunication first passageway, second cavity intercommunication second passageway, first passageway and second passageway all communicate with the third passageway, through the tip of adjustment needle in the position of third passageway with the communication area of control first passageway and second passageway.

Further, the connecting piece on be equipped with the boss that the transversal is square, the inside recess that matches this boss that corresponds of rifle body department, the boss is arranged in the recess.

By adopting the technical scheme, the utility model has the beneficial effects that: the utility model has compact structure, can control ignition and flameout by single hand operation and adjust the flame size, is convenient to install, and has compact component connection and good sealing performance.

Drawings

FIG. 1 is a left side view of a gas torch of embodiment 1 of the present utility model;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is another cross-sectional view of the gas torch shown in FIG. 1;

FIG. 4 is a schematic view showing a part of the structure of a gas torch according to embodiment 2;

fig. 5 is a schematic illustration of the gas torch of fig. 4 with the connector omitted.

Detailed Description

The utility model is further described below with reference to the drawings and examples.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Example 1: as shown in fig. 1 to 3, a gas welding gun comprises a gun body 1, a needle valve and an igniter 2, wherein the needle valve comprises a valve seat 3 and a valve needle 4, the valve seat 3 is arranged in the gun body 1, the valve needle 4 is rotatably and hermetically arranged on the valve seat 3, one end of the valve needle 4 protrudes out of the surface of one side of the gun body 1 and is provided with a knob 5, the igniter 2 is provided with a button 6, and the button 6 is arranged at the front end of the gun body 1 and performs pressing action from front to back. The gun body 1 is a hand-held gun body 1, the rear half part of the gun body 1 is held by one hand during use, the ignition or flameout can be controlled by pressing the button 6 by the index finger, the knob 5 can be touched by the thumb or the middle finger through sliding the gun body 1, and the valve needle 4 is driven to move by rotating the knob 5 by the thumb or the middle finger so as to control the flow of fuel gas flowing through the needle valve, so that the flame size is controlled.

The knob 5 is located on one side of the gun body 1, the axial direction of the knob 5 is perpendicular to the length direction of the gun body 1, and preferably, the knob 5 is located on the left side of the gun body 1 so as to be convenient for the right-handed people occupying the vast majority of people to use. The peripheral wall of the knob 5 is knurled to increase friction and avoid slipping.

The gun body 1 is internally provided with a rubber tube joint 8, a connecting piece 9 and a gun head 10, one end of the rubber tube joint 8 is connected with the rubber tube 7, the other end of the rubber tube joint is communicated with the valve seat 3, one end of the connecting piece 9 is communicated with the valve seat 3, the other end of the connecting piece is connected with the gun head 10, the front end of the gun head 10 penetrates out of the front end of the gun body 1 and is connected with a nozzle (not shown) through threads, the connecting piece 9 is provided with a vent hole 12, and an internal channel of the connecting piece 9 is communicated with the outside of the gun body 1 through the vent hole 12 so that air enters the connecting piece 9 to be mixed with fuel gas. The igniter 2 is arranged below the connecting piece 9, and correspondingly, the button 6 is positioned at the lower part of the front end of the gun body 1, so that the index finger can conveniently press the button 6. The lead wire of the igniter 2 extends into the internal passage of the connecting piece 9, and one end of the internal passage of the connecting piece 9, which is close to the valve seat 3, is provided with a filter screen and an air tap. The fuel gas conveyed by the rubber tube 7 sequentially passes through the rubber tube joint 8, the valve seat 3, the filter screen and the air tap and then enters the connecting piece 9 to be mixed with air. The ignition device may be a lighter, which ignites the fuel gas and produces a flame that is ejected from the gun head 10.

The gun head 10 may be made of stainless steel. The rear half part of the gun head 10 is parallel to the gun body 1 and is inserted into the gun body 1, and the front half part of the gun head 10 is bent downwards and forms an included angle of 50 degrees with the rear part of the gun head 10 so as to be in line with ergonomics and be more handy to use.

The gun body 1 is formed by fixing left and right parts through screws after being spliced, a plurality of ribs 18 are arranged in the gun body 1 and used for fixing the rubber tube joint 8, the valve seat 3, the connecting piece 9 and the gun head 10, and the assembly is convenient.

The gun body 1 is provided with air suction holes 11 at both sides of the gun head 10, and the air suction holes 11 are communicated with vent holes 12 on the connecting piece 9. The connecting member 9 may be provided with a plurality of ventilation holes 12 uniformly distributed along the circumference of the connecting member 9 to allow air to be abundant.

The needle valve further comprises a needle valve nut 13, a mounting hole is formed in the valve seat 3, a sealing ring is arranged at one end, away from the knob 5, of the needle valve 4, and the end portion is inserted into the mounting hole to form sealing fit with the mounting hole. The valve needle 4 is provided with external threads, the central hole of the valve needle nut 13 is provided with internal threads, the valve needle 4 is rotatably fixed in the valve needle nut 13 in a threaded joint mode, the peripheral surface of the valve needle nut 13 is provided with external threads, and the valve needle nut 13 is fixed in the mounting hole in a threaded joint mode to be combined with the valve seat 3.

The valve seat 3 is provided with a first channel 15, a second channel (not shown), a first chamber 14 and a second chamber 16, an opening of the first chamber 14 penetrates through the rear end face of the valve seat 3, the front end of the rubber tube joint 8 is inserted into the first chamber 14 and forms sealing fit with the side wall of the first chamber 14 through a sealing ring to prevent gas leakage, the first chamber 14 is communicated with the first channel 15, an opening of the second chamber 16 penetrates through the front end face of the valve seat 3, the rear end of the connecting piece 9 is inserted into the second chamber 16 and is sealed with a sealing ring arranged between the side wall of the second chamber 16, the second chamber 16 is communicated with the second channel, a third channel 17 for moving the end part of the valve needle 4 is further arranged in the valve seat 3, the first channel 15 and the second channel are communicated with the third channel 17, and the size of the communication area of the first channel 15 and the second channel is controlled by adjusting the position of the end part of the valve needle 4 in the third channel 17, so that the purpose of controlling the gas flow is achieved.

In the use process, the gun body 1 is held by one hand, the index finger control button 6 and the thumb or middle finger control knob 5 can realize the ignition, flameout and flame size control by one hand, and the gun is very convenient.

Example 2: as shown in fig. 4 and 5, the gas torch of the present embodiment 2 is different from the gas torch of the embodiment 1 in that: be equipped with the boss 19 that the transversal is personally submitted square on the connecting piece 9, the inside recess 20 that corresponds boss 19 department and be equipped with this boss 19 of matching of rifle body 1, and boss 19 is arranged in recess 20 and is spacing connecting piece 9, prevents that connecting piece 9 from rotating to make things convenient for other parts and connecting piece 9's correct equipment. The square boss is easy to manufacture and control in precision, the gun body is an injection molding piece, and the injection molding precision of the square groove is also easy to control, so that the assembly precision of the square boss is higher than that of the square boss which adopts bosses such as hexagons, pentagons and the like.

The embodiments are merely illustrative of the technical solution of the present utility model, and not limiting thereof; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model, and therefore all other embodiments obtained by those skilled in the art without making creative efforts are intended to fall within the protection scope of the present utility model.

Claims

1. A gas welding gun, characterized in that: the gun comprises a gun body, a needle valve and an igniter, wherein the needle valve comprises a valve seat and a valve needle, the valve seat is arranged in the gun body, one end of the valve needle protrudes out of the surface of one side of the gun body and is provided with a knob, the igniter is provided with a button, and the button is arranged at the front end of the gun body and performs pressing action from front to back.

2. A gas welding torch according to claim 1, wherein: the gun body is a handheld gun body, the knob is positioned at the left side of the gun body, the axial direction of the knob is perpendicular to the length direction of the gun body, and the button is positioned at the lower part of the front end of the gun body.

3. A gas welding torch according to claim 2, wherein: the gun body inside still be equipped with rubber tube joint, connecting piece and rifle head, one end of rubber tube joint connect rubber tube, other end intercommunication disk seat, one end intercommunication disk seat of connecting piece, the other end connect the rifle head, the front end of rifle head wear out rifle body front end, be equipped with the air vent on the connecting piece, the inside passageway of connecting piece passes through the air vent and communicates the rifle body outside, the some firearm be arranged in connecting piece below and the lead wire of some firearm extend to the inside passageway of connecting piece, the one end that is close to the disk seat of the inside passageway of connecting piece is equipped with filter screen and air cock.

4. A gas welding torch according to claim 3, wherein: the rear half part of the gun head is parallel to the gun body and is inserted into the gun body, and the front half part of the gun head is bent downwards and forms an included angle of 50 degrees with the rear part of the gun head.

5. A gas welding torch according to claim 3, wherein: the gun body is formed by splicing a left part and a right part and then fixing the left part and the right part through screws, and a plurality of ribs are arranged in the gun body and used for fixing a rubber tube joint, a valve seat, a connecting piece and a gun head.

6. A gas welding torch according to claim 3, wherein: the gun body is provided with air suction holes at two sides of the gun head, and the air suction holes are communicated with the vent holes on the connecting piece.

7. A gas welding torch according to claim 3, wherein: the number of the vent holes is set to be a plurality, and the vent holes are uniformly distributed along the circumference of the connecting piece.

8. A gas welding torch according to claim 3, wherein: the needle valve also comprises a needle valve nut, a mounting hole is formed in the valve seat, one end of the needle valve, far away from the knob, is inserted into the mounting hole to form sealing fit with the mounting hole, the needle valve is rotatably fixed in the needle valve nut in a threaded joint mode, and the needle valve nut is fixed in the mounting hole in a threaded joint mode to be combined with the valve seat.

9. A gas welding torch according to claim 8, wherein: the valve seat be equipped with first passageway, second passageway, third passageway, first cavity and second cavity, the opening of first cavity runs through the rear end face of valve seat, the front end that the rubber tube connects insert first cavity and form sealed cooperation with first cavity, the opening of second cavity runs through the front end face of valve seat, the rear end of connecting piece insert in the second cavity and form sealed cooperation with the second cavity, first cavity intercommunication first passageway, second cavity intercommunication second passageway, first passageway and second passageway all communicate with the third passageway, the tip through the adjustment needle is in the position of third passageway in order to control the communication area of first passageway and second passageway.

10. A gas welding torch according to claim 3, wherein: the connecting piece on be equipped with the boss that the transversal is personally submitted square, the rifle body inside correspond boss department and be equipped with the recess that matches this boss, the boss is arranged in the recess.