JPS6346098Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a welding gas suction machine that suctions gas and fume generated during welding.

This type of suction device is known from Japanese Patent Application Laid-Open No. 50-49772, but this uses the phenomenon that dust stalls and falls around the cyclone, so it is equivalent to the sloped peripheral wall surface at the bottom. This has the disadvantage that empty spaces are essential, and the equipment inevitably becomes larger. In addition, not only the separation plate but also the concave plate is required, which complicates the structure and significantly increases the ventilation resistance of the gas flow, requiring a blower with a correspondingly large capacity.

The purpose of this invention is to provide a suction device that can clean the working environment during welding by suctioning solid slag gasified by high heat during welding and other gases and fumes generated during welding. The object of the present invention is to provide a welding gas suction machine which has a simple structure and is suitable for a small and convenient type due to its rationalization.

That is, the present invention provides a dish-shaped cover 17 close to the main body connection part of the suction hose 3 that feeds the gas accompanying welding from the suction nozzle 1 into the sealed body 2, with which the suction gas flow collides. , a communication passage 10a is provided in a part of the cover 17 away from the connection part, a deflector 18 is provided on the connection part side to block the gas flow to the communication passage 10a, and a cylindrical filter 4 communicating with the communication passage 10a is provided. The filter support 6 is provided inside the main body 2 and has a large number of small holes 5 for sucking gas flow outward from the side cylinder surface of the filter support 6.
This is a welding gas suction machine which is provided with a fan 7 on the main body 2 that covers the support 6 and sucks the airflow inside the support 6 and discharges it to the outside of the machine.

The suction device in the illustrated embodiment has a cylindrical sealed body 2, and a front cover 10 having a socket 9 for a detachable hose 3 protruding from an opening 2a at one end is tightly attached via a packing 11. A rear plate 13 having a sound deadening plate 12 attached to substantially the entire surface thereof is attached to the other side opening 2b, and a main body main portion 2c is formed which is sealed by a partition plate 14 provided in the middle. Reference numeral 15 indicates a stopper for the front cover 10, and reference numeral 16 indicates a clean air outlet. The front cover 10 has a dish-shaped cover 17 on its inner surface against which the suction gas flow collides at a substantially right angle as shown in the figure, and a deflector 18 is provided on the front surface of the cover 17, and a filter assembly 19 is provided through a central communication passage 10a.
is connected to. Therefore, the welding residue in the welding gas collides with the deflector 18 and does not directly enter the filter 4, thereby preventing damage to the filter. The filter assembly 19 consists of a filter holder 20 formed in a cylindrical shape with a hole 20a in the cylindrical surface made of paper, a thin synthetic resin plate, etc., and a filter 4 housed inside the filter holder 20. The filter 4 is made of cylindrical filter paper or a filter. A filter material such as cloth is compressed in the axial direction and formed into a substantially bellows-like shape, so it has a wide contact area and can maintain good dust absorption over a long period of time. The filter assembly 19 is detachably attached to the filter support 6 fixed to the partition plate 14. In each figure, 21 is the drive motor of the fan 7 that sucks airflow from the ventilation hole 14a opened in the partition plate 14, and 22 is a substantially U-tube-shaped dust meter, one end of which is connected to the main body 2c side. A gauge is installed on the other side via a spring that resists negative pressure. The number of motors 21 is not limited to two, but may be one, and in some cases may be provided outside the machine. 2
3 is a mounting member for a stand 24 for stably mounting the main body 2; 25 is a holding stand for the suction nozzle 1; 26 is a slit-shaped suction port of the suction nozzle 1; It is placed along the direction. 27 is a modified suction nozzle, 28 is a power cord, 29 is a switch, and 30 is an air volume adjusting member provided inside the socket 9. The stand 24 is formed into a frame shape that surrounds the left, right and upper surfaces of the main body 2 by bending a tubular or rod-shaped member into a substantially U-shape. It has the advantage of being able to maintain a stable posture even if reversed, and also serves as a frame to protect the switch 29 and others.

Since the present invention has the above-mentioned configuration, the gas flow associated with welding sucked from the suction nozzle 1 is sent to the inside of the filter 4 through the suction hose 3, and a wide area formed in the circumferential direction is fed to the inside of the filter 4. Since the welding gas, fume, and solid slag in the gas can be filtered by the pleats, a large volume of welding gas flow can be efficiently suctioned and purified in a short time, and the working environment can be smoothly cleaned.

In particular, according to the present invention, the dish-shaped cover 17 is provided close to the hose connection part, and the communication path 10a of the cover 17 to the filter 4 is provided away from the connection part.
Since the solid slag is provided with a deflector 18, the solid slag gasified by high heat collides with these covers 17, is obstructed by the deflector 18, and does not lose its momentum during that time, and is pulverized until it reaches the communication path 10a. The temperature is lowered to 1, and then it moves randomly into the filter 4. Therefore, there is no risk of the dust directly flying into the filter 4 and causing burnout, and moreover, it can be captured together with other dust and the like in the same filter 4. Furthermore, there is no need to separate and capture substances with high specific gravity, and no space is required for this purpose.
Since the cover 17 is in the shape of a sunken dish and the deflector 18 is in the shape of a plate, the heat-resistant portion can be formed very thin, contributing to miniaturization. Also filter 4
Since there are no concave portions up to , there is no stagnation of airflow, and therefore no needless increase in resistance. Therefore, although it is small and convenient, it is efficient.

[Brief explanation of the drawing]

The drawings show an embodiment of the welding gas suction device according to the present invention, in which FIG. 1 is a cutaway side view of the main part, and FIG. 2 is an overall perspective view. 1... Suction nozzle, 2... Main body, 3... Suction hose, 4... Filter, 5... Small hole, 6... Filter support, 7... Fan, 10a... Communication path, 17... Down plate Shape cover, 18...Deflector.

Claims (1)

[Claims for Utility Model Registration] (1) A dish-shaped cover where the suction gas flow collides with the main body connection part of the suction hose 3 that feeds the gas associated with welding from the suction nozzle 1 into the sealed body 2. 17 are provided adjacent to each other, a communicating path 10a is provided in a portion of the cover 17 remote from the connecting portion, and a substantially plate-shaped deflector 18 is provided on the connecting portion side to block the gas flow to the communicating path 10a. Communication path 1
A cylindrical filter 4 communicating with the main body 2 is provided inside the main body 2, and the filter 4 is covered by a filter support 6 having a large number of small holes 5 for sucking gas flow outward from the side cylinder surface.
This welding gas suction machine has a main body 2 equipped with a fan 7 that sucks in airflow and discharges it to the outside of the machine. (2) The welding gas suction machine according to claim 1, wherein the cover 17 is provided so that the suction gas flow collides with the suction gas flow at a substantially right angle.