Forced ventilation device for welding of liquefied gas storage tank

Abstract

The utility model discloses a forced ventilation device for welding of a liquefied gas storage tank. The forced ventilation device comprises an air feeder, an air outlet of the air feeder is connected with a ventilation pipe; the middle part of the C-shaped pipe is mounted on a flange opening formed in the side wall of the tank body through a mounting frame, one end of the C-shaped pipe is positioned outside the tank body and is connected with the tail end of the ventilation pipe, and the other end of the C-shaped pipe extends into the tank body and is connected with a telescopic hose; the tail end of the telescopic hose is connected with a hard tail pipe; the outer side of the tail pipe is sleeved with a clamping hoop, and a magnetic attraction block is fixedly connected to the clamping hoop and used for attracting and fixing the clamping hoop to the inner wall of the tank body. Forced ventilation can be carried out on the interior of the tank body, the air environment in the tank body is improved, workers can carry out welding operation in the tank body conveniently, and safety is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tank container manufacturing and relates to a welding forced ventilation device for a liquefied gas storage tank. Background Art

[0002] In the petrochemical industry, the manufacturing process of large, high-pressure tanks, such as liquefied gas storage tanks, often requires manual entry to perform welding operations to ensure weld quality and weld internal structures. This poor ventilation, coupled with the fumes emitted by welding flux, can easily accumulate inside the tank, causing hypoxia and severely impacting the health and safety of operators, potentially leading to accidents such as fainting or suffocation. Furthermore, even if someone faints, rescuers will find it difficult to enter the oxygen-deficient tank in time to provide assistance. Utility Model Content

[0003] In order to overcome the deficiencies in the background technology, the utility model provides a liquefied gas storage tank welding forced ventilation device, the purpose of which is to perform forced ventilation inside the tank body, improve the air environment inside the tank body, so as to facilitate personnel to perform welding operations inside the tank body and improve safety.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] A forced ventilation device for welding a liquefied gas storage tank comprises a blower; the air outlet of the blower is connected to a ventilation pipe; the middle portion of a C-shaped tube is mounted on a flange opening provided on the side wall of a tank body via a mounting bracket, one end of the C-shaped tube is located outside the tank body and is connected to the end of the ventilation pipe, and the other end extends into the interior of the tank body and is connected to a telescopic hose; the end of the telescopic hose is connected to a hard tail pipe; a clamp is mounted on the outside of the tail pipe, and a magnetic block is fixed to the clamp for adsorbing and fixing the clamp to the inner wall of the tank body.

[0006] As a further optimization, the mounting frame includes a plurality of support rods fixedly connected to the outer wall of the C-shaped tube, and the plurality of support rods are evenly distributed around the axis of the C-shaped tube; a connecting hole is provided at the end of each support rod for being installed on the flange mouth through a bolt assembly.

[0007] As a further optimization, a signal line connector is provided on the C-shaped tube located outside the tank body. The signal line connector extends deep into the C-shaped tube and is connected to a wiring harness; the wiring harness is connected to an oxygen sensor preset on the outer wall of the tail pipe.

[0008] As a further optimization, an alarm switch and a temperature sensor are further provided on the outer wall of the tail pipe; the temperature sensor and the alarm switch are both connected to the wiring harness.

[0009] As a further optimization, the side wall of the tail pipe is further provided with a plurality of air outlets.

[0010] The beneficial effects of the utility model are as follows: the utility model can perform forced ventilation into the interior of the tank body, thereby improving the air environment inside the tank body, making it easier for personnel to perform welding operations inside the tank body, and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0012] Figure 2 A top view of a mounting bracket according to an embodiment of the present invention;

[0013] The correspondence between the technical features and the reference numerals in the figure is: blower 1; ventilation duct 2; C-shaped tube 3; signal line connector 31; wiring harness 32; oxygen sensor 33; alarm switch 34; temperature sensor 35; air outlet 36; mounting bracket 4; support rod 41; tank body 5; flange opening 51; telescopic hose 6; tail pipe 7; clamp 71; magnetic block 72; the arrows in the figure indicate the direction of airflow. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0015] Example 1, please refer to Figure 1-2 The utility model provides a forced ventilation device for welding a liquefied gas storage tank, comprising a blower 1; an air outlet 36 of the blower 1 is connected to a ventilation pipe 2; the middle portion of a C-shaped tube 3 is mounted on a flange opening 51 opened on the side wall of a tank body 5 through a mounting bracket 4, one end of the C-shaped tube 3 is located outside the tank body 5 and is connected to the end of the ventilation pipe 2, and the other end thereof is located inside the tank body 5 and is connected to a telescopic hose 6; the end of the telescopic hose 6 is connected to a hard tail pipe 7; a clamp 71 is sleeved on the outside of the tail pipe 7, and a magnetic block 72 is fixed to the clamp 71 for adsorbing and fixing the clamp 71 on the inner wall of the tank body 5.

[0016] During use, insert one end of the C-shaped tube 3 into the flange opening 51 until the straight section of the C-shaped tube 3 is vertically inserted into the flange opening 51. The C-shaped tube 3 is then suspended and mounted on the flange opening 51, supported by the mounting bracket 4. Then, the telescopic hose 6, connecting the tail pipe 7 to the C-shaped tube 3, is connected inside the tank 5. This ensures that when ventilating the tank 5, the air inside the tank 5 does not escape from the flange opening 51, thereby creating a circulating airflow within the tank 5. The telescopic hose 6 allows the tail pipe 7 to be adjusted, facilitating forced ventilation of the work area. The magnetic block 72 allows the tail pipe 7 to be removably fixed to the tank 5, making it easy to assemble and disassemble, thus improving ease of use. Finally, turn on the blower 1, allowing air to flow through the ventilation pipe 2, C-shaped tube 3, telescopic hose 6, and tail pipe 7 before entering the tank 5. Air inside the tank 5 can also escape from the flange opening 51, creating a circulating airflow that improves the air environment inside the tank 5, prevents oxygen deficiency, and enhances welding safety.

[0017] An exemplary mounting frame 4 structure includes a plurality of support rods 41 fixedly connected to the outer wall of the C-shaped tube 3, and the plurality of support rods 41 are evenly distributed around the axis of the C-shaped tube 3; a connecting hole is provided at the end of each support rod 41 for being mounted on the flange opening 51 by a bolt assembly.

[0018] To further enhance safety, a signal line connector 31 is provided on the C-shaped tube 3, located outside the tank 5. This connector extends deep into the C-shaped tube 3 and connects to a wiring harness 32. This wiring harness 32 is connected to an oxygen sensor 33 located on the outer wall of the tail pipe 7. Therefore, when the oxygen level inside the tank 5 falls below a preset value, an alarm connected to the signal line connector 31 sounds, promptly notifying operators inside the tank 5 to cease operations. This also helps personnel outside the tank 5 detect danger and facilitate rescue efforts.

[0019] A more preferred option is to further provide an alarm switch 34 and a temperature sensor 35 on the outer wall of the tail pipe 7; both the temperature sensor 35 and the alarm switch 34 are connected to the wiring harness 32. The alarm switch 34 allows the operator inside the tank 5 to proactively issue an alarm signal, further enhancing safety. After prolonged welding, the temperature inside the tank 5 will rise. The temperature sensor 35 facilitates timely monitoring of temperature changes, preventing the operator from experiencing physical discomfort due to excessive temperatures.

[0020] In order to speed up the input of fresh air, the side wall of the tail pipe 7 is also provided with a plurality of air outlets 36. Figure 1As shown, a preferred embodiment is that the tail pipe 7 is fixed to the top of the inside of the horizontal tank body 5, and its end is the main ventilation port, which plays a role in improving the air environment at the welding operation point, and the air outlet 36 is located just above the operator's head, which increases the air volume while cooling the operator and improving comfort.

[0021] In summary, this embodiment can perform forced ventilation into the interior of the tank body 5, thereby improving the air environment inside the tank body 5, making it easier for personnel to perform welding operations inside the tank body 5 and improving safety.

[0022] The parts not described in detail in this utility model are prior art. For those skilled in the art, the technical features of the above embodiments can be combined in any way. To keep the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A forced ventilation device for welding a liquefied gas storage tank, comprising a blower (1); an air outlet (36) of the blower (1) is connected to a ventilation pipe (2); and is characterized in that: The middle portion of the C-shaped tube (3) is mounted on a flange opening (51) provided on the side wall of the tank body (5) via a mounting bracket (4); one end of the C-shaped tube (3) is located outside the tank body (5) and is connected to the end of the ventilation pipe (2); the other end of the C-shaped tube (3) is inserted into the tank body (5) and is connected to a telescopic hose (6); the end of the telescopic hose (6) is connected to a hard tail pipe (7); a clamp (71) is mounted on the outside of the tail pipe (7); a magnetic block (72) is fixed to the clamp (71) for adsorbing and fixing the clamp (71) on the inner wall of the tank body (5).

2. The forced ventilation device for liquefied gas storage tank welding according to claim 1, characterized in that: The mounting frame (4) comprises a plurality of support rods (41) fixedly connected to the outer wall of the C-shaped tube (3), wherein the plurality of support rods (41) are evenly distributed around the circumference of the axis of the middle part of the C-shaped tube (3); a connection hole is provided at the end of each support rod (41) for being mounted on the flange opening (51) via a bolt assembly.

3. The forced ventilation device for liquefied gas tank welding according to claim 1, characterized in that: A signal line connector (31) is provided on the C-shaped tube (3) located outside the tank body (5), and the end of the signal line connector (31) extends deep into the interior of the C-shaped tube (3) and is connected to a wiring harness (32); the wiring harness (32) is connected to an oxygen sensor (33) preset on the outer wall of the tail pipe (7).

4. The forced ventilation device for liquefied gas tank welding according to claim 3, characterized in that: An alarm switch (34) and a temperature sensor (35) are also provided on the outer wall of the tail pipe (7); the temperature sensor (35) and the alarm switch (34) are both connected to the wiring harness (32).

5. The forced ventilation device for liquefied gas storage tank welding according to claim 1, characterized in that: The side wall of the tail pipe (7) is also provided with a plurality of air outlets (36).

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