Sealing gas holder for preventing low-altitude leakage accidents of inlet and outlet pipelines

Abstract

The invention discloses a sealed gas holder for preventing low-altitude leakage accidents of inlet and outlet pipelines, and belongs to the technical field of gas holder sealing equipment.The sealed gas holder comprises a gas holder body, the same pipelines are connected to an inlet and an outlet of the gas holder, gate valves are arranged at the joints of the inlet and the outlet of the gas holder and the pipelines, and a sealing box covers the gate valves; according to the low-altitude gas leakage prevention device, low-altitude gas leakage can be effectively prevented, and the safety of operators is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of gas cabinet sealing equipment, in particular to an inlet and outlet pipeline leakage prevention accident sealing gas cabinet. Background Art

[0002] In the production process of steel enterprises, gas holders are needed to store gas to provide a stable gas supply for steelmaking, ironmaking and other production processes. According to the type, they can be divided into high-pressure, coke and converter gas holders. Because gas is a flammable gas, if it leaks, there is a risk of accidents. The existing methods for reducing gas leakage accidents are mostly to strengthen the sealing effect, use water seals and blind plate valves to effectively isolate the gas and ensure the sealing effect. For example, document CN209638397 discloses a converter gas holder pressurizer anti-leakage device, a sealing cover is provided at the rotating shaft of the converter gas holder pressurizer, the sealing cover includes an upper cover body and a lower cover body, the upper cover body and the lower cover body are detachably connected, a plurality of sealing rings are arranged at intervals along the axial direction of the rotating shaft of the converter gas holder, a plurality of sealing grooves adapted to the sealing rings are arranged in the sealing cover, the sealing cover is installed on the rotating shaft through the limiting fit of the sealing groove and the sealing ring, and the high-pressure inert gas source is connected to the gap between the sealing cover and the rotating shaft through the gas supply pipeline. However, no matter how good the seal is, in actual operation, there is still a risk of low-altitude gas leakage during inspection or gas tank overhaul, because low-altitude gas leakage may lead to subsequent gas combustion accidents and gas poisoning accidents, causing casualties and property losses and affecting the orderly progress of production. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a sealed gas cabinet for preventing low-altitude leakage accidents of inlet and outlet pipelines, which can effectively evacuate the gas leaked at low altitude while ensuring the sealing effect, thereby effectively preventing low-altitude gas leakage accidents.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a sealed gas holder for preventing low-altitude leakage accidents of inlet and outlet pipelines, including a gas holder body, the same pipelines are connected to the inlet and outlet of the gas holder, gate valves are arranged at the connection between the inlet and outlet of the gas holder and the pipeline, the outer cover of the gate valve is provided with a sealing box, and a plurality of vertically upward normally open diffusion pipes are arranged on the top of the sealing box.

[0005] A further improvement of the technical solution of the present invention is that an air intake duct is arranged at the bottom of the sealed box, and a blower for introducing air into the sealed box is connected to the air intake duct.

[0006] A further improvement of the technical solution of the present invention is that the sealing box is a rectangular box composed of five sealing plates, four of which are in direct contact with the side walls of the gas tank, and sealing strips are provided at the contact points with the gas tank. A through hole for the pipeline to pass through is provided at the center of the sealing plate that is not in direct contact with the side walls of the gas tank, and a sealing ring is embedded at the inner edge of the through hole.

[0007] A further improvement of the technical solution of the present invention is that an air blower air inlet is arranged in the middle of the sealing plate on the bottom surface of the sealing box, and the air blower air inlet is a protruding funnel-shaped air inlet.

[0008] A further improvement of the technical solution of the present invention is that the air intake pipe is made of rubber material, is sleeved on the blast air inlet, and is sleeved on the outside with a clamping hoop.

[0009] A further improvement of the technical solution of the present invention is that the normally open diffuser pipe height is 10m.

[0010] Due to the adoption of the above technical scheme, the technical progress achieved by the present invention is as follows: by providing a sealing box on the outer cover of the plug valve of the gas cabinet, the gas leaked from the gas cabinet will be sealed in the sealing box, and the secondary seal can effectively ensure the sealing effect. At the same time, by providing a large-sized normally open diffusion pipe with a high height on the sealing box, the gas leaked from the gas cabinet will not diffuse outward while being sealed in the sealing box. Since the weight of the gas is lower than that of the air, it can overflow to a high place along the diffusion pipe, effectively avoiding the harm caused to personnel by the low-altitude leakage of the gas. By continuously performing blast ventilation in the sealing box, the air in the sealing box is always in a flowing state, the leaked coal gun will not gather, and it is more convenient to diffuse at high altitude through the diffusion pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 This is a schematic diagram of the structure of a sealed gas cabinet for preventing low-altitude leakage accidents of inlet and outlet pipelines of the present invention;

[0013] Figure 2 It is a left side view of the sealing box of the present invention;

[0014] Among them, 1. Gas tank, 2. Pipeline, 3. Sealing box, 4. Gate valve, 5. Normally open diffuser, 6. Air intake pipe, 7. Blower. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below in conjunction with embodiments:

[0016] Embodiment 1:

[0017] like Figure 1 and Figure 2 As shown, a sealed gas holder for preventing low-altitude leakage accidents of inlet and outlet pipelines includes a gas holder 1 body. The same pipeline 2 is provided at the inlet and outlet of the gas holder 1. Gas enters and exits the gas holder 1 through the pipeline 2 to achieve storage and call of gas. In order to ensure the sealing effect, a plug valve 4 is provided at the connection between the inlet and outlet of the gas holder 1 and the pipeline. The opening and closing of the pipeline is achieved by adjusting the position of the plug plate 41, thereby controlling the inlet and outlet of the gas. When the gas holder 1 stores gas, the plug plate 41 covers the pipeline 2 to achieve sealing of the pipeline. In order to prevent personnel accidents caused by low-altitude leakage of gas, a sealing box 3 is provided on the outside of the plug valve 4 at the inlet and outlet of the gas holder 1 to achieve double sealing of the sealing box 3 and the plug valve 4. The gas leaking from the plug valve 4 will also be sealed in the sealing box 3, effectively ensuring the sealing effect. The sealed box 3 is a rectangular box body composed of five sealing plates, four of which are in direct contact with the side wall of the gas tank 1 and welded to the side wall, and a sealing strip is provided at the contact point between the box body and the side wall to ensure the sealing effect. A through hole for the pipeline 2 to pass through is provided at the center of the sealing plate on the fifth side of the sealed box 3, i.e., the side that is not in direct contact with the side wall of the gas tank 1, and a sealing ring is embedded at the inner edge of the through hole to ensure the sealing performance inside the sealed box 1.

[0018] A plurality of normally open diffusion pipes 5 pointing vertically upward are arranged on the top of the sealing box 3, and the height of the diffusion pipes 5 is 10m. Since the unit mass of gas is lower than that of air, the gas will escape upward, and then rise into the air along the higher diffusion pipes 5. The gas leaked from the gate valve 4 itself is limited, and the leaked gas is sealed in the sealing box, and at the same time escapes into the air along the diffusion pipes as high as 10m, effectively avoiding a series of possible accidents to personnel caused by low-altitude gas leakage.

[0019] Embodiment 2:

[0020] This embodiment is based on the first embodiment, and the sealed box is modified to add an air intake pipe, and the sealed box 3 is continuously blasted to ensure that the gas in the sealed box remains flowing. The coal gas no longer overflows naturally, but is carried out along the vent pipe by the flowing gas, which makes it easier to discharge the escaped coal gas sealed in the sealed box 3 into the air at high altitude. Specifically, a blast air inlet is provided in the middle of the sealing plate on the bottom of the sealed box 3. The blast air inlet is specifically a protruding funnel-shaped, with a small opening at the bottom of the funnel as the air inlet, and a large opening is welded to the bottom sealing plate. An air intake pipe 6 is sleeved on the blast air inlet. The air intake pipe 6 is made of rubber, and the head end is sleeved on the blast air inlet. A clamping hoop is also sleeved on the outside of the air intake pipe 6 to further firmly fix the air intake pipe 6 on the blast air inlet. A blower 7 is connected to the end of the air inlet pipe 6. The blower 7 is in a normally open state at a low gear, and continuously introduces air into the sealed box 3. The gas in the sealed box 3 is in a flowing state and circulates continuously, so that the gas escaping from the gas tank 1 through the gate valve 4 will not accumulate in the sealed box 3, but will overflow slowly under the influence of air pressure, which is more conducive to the discharge of gas at a high place, and effectively eliminates the risk of gas leakage at low altitude.

[0021] The present invention adopts a sealing box to perform double sealing of the cover-mounted plug valve, thereby ensuring the sealing effect. At the same time, it adheres to the concept that it is better to release than to block, and uses a large-sized and high vent pipe to release a small amount of escaped gas into the air, effectively avoiding accidents caused by low-altitude leakage of the coal gun, and effectively ensuring the orderly and smooth progress of production.

[0022] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A sealed gas tank for preventing low-altitude leakage accidents of inlet and outlet pipelines, comprising a gas tank (1) body, wherein the inlet and outlet of the gas tank (1) are connected with the same pipeline (2), characterized in that: A gate valve (4) is provided at the connection between the inlet and outlet of the gas tank and the pipeline (2), the outer cover of the gate valve (4) is provided with a sealing box (3), and the top of the sealing box (3) is provided with a plurality of vertically upward normally open diffuser pipes (5).

2. A sealed gas cabinet for preventing low-altitude leakage accidents of inlet and outlet pipelines according to claim 1, characterized in that: An air intake duct (6) is arranged at the bottom of the sealed box (3), and a blower (7) for introducing air into the sealed box (3) is connected to the air intake duct (6).

3. A sealed gas tank for preventing low-altitude leakage accidents of inlet and outlet pipelines according to claim 2, characterized in that: The sealing box (3) is a rectangular box body composed of five sealing plates, four of which are in direct contact with the side wall of the gas tank (1), and a sealing strip is provided at the contact point with the gas tank (1). A through hole for the pipeline (2) to pass through is provided at the center of the sealing plate that is not in direct contact with the side wall of the gas tank (1), and a sealing ring is embedded at the inner edge of the through hole.

4. A sealed gas tank for preventing low-altitude leakage accidents of inlet and outlet pipelines according to claim 3, characterized in that: An air blower air inlet is arranged in the middle of the sealing plate on the bottom surface of the sealing box (3), and the air blower air inlet is a protruding funnel-shaped air inlet.

5. A sealed gas tank for preventing low-altitude leakage accidents of inlet and outlet pipelines according to claim 4, characterized in that: The air inlet pipe (6) is made of rubber material, is sleeved on the air inlet of the blast, and is sleeved on the outside with a clamping hoop.

6. A sealed gas cabinet for preventing low-altitude leakage accidents of inlet and outlet pipelines according to claim 1, characterized in that: The normally open diffuser (5) has a height of 10 m.

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