Frame welding exhaust collection device

Abstract

This utility model discloses a frame welding exhaust gas collection device, including a support frame fixed on a welding machine, a gas collection hood mounted on the support frame, an exhaust pipe at the top of the gas collection hood, a negative pressure fan installed between the exhaust pipe and the gas collection hood, an inner cover with a sealed top inside the gas collection hood, a sealing plate fixedly connected to the bottom of the gas collection hood and the inner cover, and the sealing plate fixedly connected to the support frame, multiple vertically arranged suction pipes fixed to the lower surface of the sealing plate, the lower end of the suction pipes being sealed and the upper end communicating with the inner cavity of the gas collection hood, and suction holes provided on the pipe wall. This utility model, by setting an inner cover inside the gas collection hood and sealing the bottom with a sealing plate, reduces the effective internal space of the gas collection hood, avoiding the decrease in air and exhaust gas flow velocity during negative pressure fan suction, which would make it difficult to draw in the exhaust gas. The exhaust gas is collected by extending downwards through the suction pipes, effectively preventing the exhaust gas from escaping to the surroundings, resulting in more thorough and better collection of exhaust gas.

Description

Technical Field

[0001] This utility model relates to the field of welding machine technology, specifically to a frame welding exhaust gas collection device. Background Technology

[0002] In the production of ton container frames, perpendicular steel pipes are welded together, bent, and then riveted to form the frame. Currently, we use resistance welding machines for frame welding. Resistance welding machines are devices that use resistance heating principles for welding, featuring fast welding speed, high welding strength, and low material consumption. They are suitable for large-scale automated production and occupy an important position in modern industry due to their high efficiency and reliability.

[0003] During the welding process, the exhaust gas generated from metal melting and welding contains harmful substances. It is necessary to collect the exhaust gas and transport it to the exhaust gas treatment workshop for treatment. At present, most companies use negative pressure fans in conjunction with fume collection hoods to collect exhaust gas. Because the bottom of the fume collection hood is spacious and the internal space is relatively large, the flow velocity at the bottom of the fume collection hood is relatively small when the negative pressure fan draws in exhaust gas and air. The collection effect of exhaust gas is generally average. Especially when the factory is ventilated, the air conditioner is on, or pedestrians or work vehicles pass by the welding machine and cause the surrounding air to circulate, it is easy for exhaust gas to escape from the surroundings without being completely collected by the fume collection hood, resulting in poor collection effect. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a frame welding exhaust gas collection device, which solves the problem that the collection effect of exhaust gas is limited when using a gas collection hood with a wide bottom and a large internal space, due to the influence of surrounding air flow.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A frame welding exhaust gas collection device includes a support frame fixed on a welding machine, a gas collection hood on the support frame, an exhaust pipe on the top of the gas collection hood, a negative pressure fan installed between the exhaust pipe and the gas collection hood, an inner cover with a sealed top inside the gas collection hood, a sealing plate fixedly connected to the bottom of the gas collection hood and the inner cover, and the sealing plate fixedly connected to the support frame, a plurality of vertically arranged suction pipes fixed on the lower surface of the sealing plate, the lower end of the suction pipes being sealed and the upper end communicating with the inner cavity of the gas collection hood, and suction holes being provided on the pipe wall of the suction pipes.

[0007] Preferably, both the gas collecting hood and the inner hood are conical buckets with a narrow top and a wide bottom, and the sidewalls of the inner hood and the gas collecting hood are parallel to each other.

[0008] Preferably, the sealing plate is in a "mouth" shape, and the suction pipes are arranged equidistantly along the lower surface of the sealing plate.

[0009] Preferably, the lower end of the suction pipe is no more than 20 cm away from the tabletop of the welding machine, and the distance between adjacent suction pipes is no more than 10 cm.

[0010] Preferably, the suction holes are arranged on the inner side wall of the suction pipe corresponding to the inner cover, and the suction holes are evenly arranged on the inner side wall of the suction pipe.

[0011] Preferably, a mounting rack for installing a light source or a camera is fixed on the inner wall of the inner cover.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] (1) By arranging an inner cover inside the air collection hood and sealing the bottom end with a sealing plate, the effective internal space of the air collection hood is reduced, avoiding the decrease in the air and waste gas flow rates during the suction of the negative pressure fan, which makes it difficult to inhale. The waste gas is collected by the downward extension of the suction pipe, effectively preventing the waste gas from escaping to the surroundings, making the waste gas collection more thorough and having a better collection effect. It solves the problem that when using an air collection hood with a spacious bottom and a relatively large internal space to collect waste gas, the collection effect of the waste gas is easily limited due to the influence of the surrounding air flow.

[0014] (2) The suction pipes of the utility model are arranged equidistantly with gaps between adjacent ones. While enhancing the waste gas collection effect, it will not completely block the line of sight and affect the staff's external observation of the welding situation during the welding process, meeting the normal use requirements and having strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the installation structure of the utility model;

[0016] Figure 2 is a schematic diagram of the overall structure of the utility model;

[0017] Figure 3 is a bottom view of the utility model;

[0018] Figure 4 is a front sectional view of the utility model.

[0019] In the figure: 1, welding machine; 2, support frame; 3, air collection hood; 4, exhaust pipe; 5, negative pressure fan; 6, inner cover; 7, sealing plate; 8, suction pipe; 9, suction hole; 10, mounting rack. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0021] As Figure 1-4 shown, the present utility model provides a technical solution: a frame welding waste gas collection device, which includes a support frame 2 fixed on a welding machine 1. A gas collection hood 3 is arranged on the support frame 2. An exhaust pipe 4 is arranged at the top of the gas collection hood 3. A negative pressure fan 5 is installed between the exhaust pipe 4 and the gas collection hood 3. An inner hood 6 with a sealed top end is arranged inside the gas collection hood 3. An installation rack 10 for installing a light source or a camera is fixed on the inner wall of the inner hood 6. Both the gas collection hood 3 and the inner hood 6 are conical hoppers with a narrow top and a wide bottom. The side walls of the inner hood 6 and the gas collection hood 3 are parallel to each other;

[0022] A sealing plate 7 is fixedly connected to the bottoms of the gas collection hood 3 and the inner hood 6, and the sealing plate 7 is fixedly connected to the support frame 2. The sealing plate 7 is in a "mouth" shape. A plurality of vertically arranged suction pipes 8 are fixed on the lower surface of the sealing plate 7. The lower ends of the suction pipes 8 are sealed and the upper ends are connected to the inner cavity of the gas collection hood 3. The suction pipes 8 are arranged at equal distances along the lower surface of the sealing plate 7;

[0023] The lower ends of the suction pipes 8 are not more than 20 cm away from the tabletop of the welding machine 1. The distance between adjacent two suction pipes 8 is not more than 10 cm. Suction holes 9 are arranged on the pipe walls of the suction pipes 8. The suction holes 9 are arranged on the inner side pipe walls of the suction pipes 8 corresponding to the inner hood 6. The suction holes 9 are evenly arranged on the inner side pipe walls of the suction pipes 8.

[0024] Working principle:

[0025] An inner hood 6 is arranged inside the gas collection hood 3, and the bottom end is sealed by the sealing plate 7, which reduces the effective internal space of the gas collection hood 3, avoiding the decrease in the flow rates of air and waste gas when the negative pressure fan 5 sucks air, making it difficult to suck in. The suction pipes 8 extend downward to collect waste gas, effectively preventing the waste gas from escaping to the surroundings, making the waste gas collection more thorough and the collection effect better.

[0026] It should be noted that in this article, terms such as "including", "comprising" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to this process, method, article or device.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A frame welding exhaust gas collection device, comprising a support frame (2) fixed on a welding machine (1), wherein a gas collection hood (3) is provided on the support frame (2), characterized in that: An exhaust pipe (4) is provided at the top of the air collecting hood (3), a negative pressure fan (5) is installed between the exhaust pipe (4) and the air collecting hood (3), an inner hood (6) with a sealed top is arranged inside the air collecting hood (3), a sealing plate (7) is fixedly connected to the bottoms of the air collecting hood (3) and the inner hood (6), and the sealing plate (7) is fixedly connected to the support frame (2). A plurality of vertically arranged suction pipes (8) are fixed to the lower surface of the sealing plate (7). The lower ends of the suction pipes (8) are sealed and the upper ends are communicated with the inner cavity of the air collecting hood (3). Suction holes (9) are provided on the pipe walls of the suction pipes (8).

2. The frame welding exhaust gas collection device according to claim 1, characterized in that: Both the air collecting hood (3) and the inner hood (6) are conical hoppers with a narrow top and a wide bottom, and the side walls of the inner hood (6) and the air collecting hood (3) are parallel to each other.

3. The frame welding exhaust gas collection device according to claim 1, characterized in that: The sealing plate (7) is in a "mouth" shape, and the suction pipes (8) are arranged equidistantly along the lower surface of the sealing plate (7).

4. The frame welding exhaust gas collection device according to claim 1, characterized in that: The lower ends of the suction pipes (8) are not more than 20 cm away from the tabletop of the welding machine (1), and the distance between adjacent two suction pipes (8) is not more than 10 cm.

5. The frame welding exhaust gas collection device according to claim 1, characterized in that: The suction holes (9) are provided on the inner side pipe walls of the suction pipes (8) corresponding to the inner hood (6), and the suction holes (9) are evenly arranged on the inner side pipe walls of the suction pipes (8).

6. The frame welding exhaust gas collection device according to claim 1, characterized in that: An installation rack (10) for installing a light source or a camera is fixed to the inner wall of the inner hood (6).

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