Gas pipeline leakage plugging device

Abstract

A gas pipeline leakage plugging device relates to the technical field of gas conveying pipelines and comprises a lower shell, an upper shell, a nitrogen pipe, a bleeder, a bleeder blind plate, an adjusting port, an adjusting port blind plate, a magnet and iron powder. According to the gas pipeline leakage emergency repair device, non-stop gas pipeline leakage emergency repair is carried out in a temporary plugging and sealing welding mode, iron powder is adsorbed to the powerful magnet, the magnet is fixed to the gas pipeline leakage position through the magnetic force of the magnet, the temporary plugging effect is achieved, most leakage pressure can be eliminated, and then the shell is arranged around the leakage point in advance; according to the utility model, the gas leakage rate is reduced by pre-sealing of the magnet and the iron powder, so that the safety is greatly improved during the welding operation, and the plugging emergency repair construction with gas seal welding is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of gas transmission pipelines, in particular to a gas pipeline leakage blocking device. Background Art

[0002] The gas pipelines in steel plants contain water and various corrosive impurities in the gas, which can cause pipeline corrosion and gas leakage during long-term use. The conventional emergency treatment method is to stop the gas transmission and repair the gas pipeline leakage. However, closing the valve will lead to production suspension, and repairing the pipeline will pose a major safety hazard. Since the gas is in a leaking state, the leakage volume is uncontrollable, which can easily lead to accidents during welding operations. Therefore, the industry is in urgent need of a safe and reliable gas pipeline leakage plugging device.

[0003] In the Chinese utility model patent authorized by our company, with publication number CN216131572U and titled [A gas transmission pipeline leakage emergency rescue device], a technical solution for gas pipeline leakage plugging is disclosed. However, two problems are often encountered during on-site construction. First, since the surface of the gas pipeline is arc-shaped and the diameters of the pipelines are of different sizes, it is difficult to purchase neodymium iron boron magnets with matching shapes on the market. If a strong rectangular magnet is used, the magnet and the outer surface of the pipeline cannot fit completely, which will lead to poor sealing at the leakage point, affecting the construction. Second, during the construction process, when the magnet is not sealed tightly or shifted, the upper and lower shells need to be disassembled and reassembled. Due to the large size of the upper and lower shells, it is inconvenient to operate. In order to overcome the above problems, our company has further improved and developed a gas pipeline leakage plugging device. Utility Model Content

[0004] The utility model aims to provide a gas pipeline leakage blocking device, which can safely and reliably perform emergency repair welding operations without stopping gas transportation after the gas pipeline leaks.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A gas pipeline leakage plugging device comprises a lower shell, an upper shell, a nitrogen pipe, a vent pipe, a vent pipe blind plate, an adjustment port, an adjustment port blind plate, a magnet, and iron powder; a nitrogen pipe is arranged on the lower shell, a vent pipe and an adjustment port are arranged on the upper shell, the vent pipe blind plate is sealed and fastened to the vent pipe by fastening bolts, and the adjustment port blind plate is sealed and fastened to the adjustment port; after the magnet absorbs the iron powder, it is pressed and absorbed on the gas leakage port of the gas pipeline; an upper shell flange and a lower shell flange are respectively arranged on the lower edge of the upper shell and the upper edge of the lower shell, and the upper shell flange and the lower shell flange are pre-fastened by fasteners after being aligned, and finally sealed and welded; the upper shell and the lower shell are connected to the gas pipeline by welding.

[0007] In the above-mentioned gas pipeline leakage plugging device, a valve is installed on the nitrogen pipe. The valve and the blind plate of the vent pipe are opened to use nitrogen to purge the cavity surrounded by the lower shell and the upper shell.

[0008] In the above-mentioned gas pipeline leakage plugging device, protrusions are correspondingly arranged at the middle positions of the upper shell and the lower shell.

[0009] The utility model has the following advantages:

[0010] The gas pipeline leakage plugging device of the utility model adopts the method of temporary plugging and sealing welding to carry out emergency repair of gas pipeline leakage without stopping production, adsorbs iron powder onto a strong magnet, and uses the magnetic force of the magnet to fix the magnet at the leakage point of the gas pipeline, which plays a role of temporary plugging and can eliminate most of the leakage pressure, and then the shell is pre-placed around the leakage point, and the shell is purged and filled with inert gas, and finally welded and sealed. Since the pre-sealing of the magnet and iron powder reduces the amount of gas leakage, the safety is greatly improved during the welding operation, and the plugging and repair construction with gas sealing welding can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a cross-sectional schematic diagram of the utility model;

[0012] Figure 2 It is the AA section view;

[0013] The reference numerals in the figure represent: 1, gas pipeline, 2, lower shell, 3, upper shell, 4, nitrogen pipe, 5, valve, 6, vent pipe, 7, vent pipe blind plate, 8, adjustment port, 9, adjustment port blind plate, 10, magnet, 11, iron powder, 12, raised portion, 13, upper shell flange, 14, lower shell flange. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] The utility model of the gas pipeline leakage plugging device comprises a lower shell 2, an upper shell 3, a nitrogen pipe 4, a venting pipe 6, a venting pipe blind plate 7, an adjustment port 8, an adjustment port blind plate 9, a magnet 10, and iron powder 11; when the gas pipeline 1 leaks and needs emergency plugging, firstly, we mix the iron powder and the paste colloid evenly into a paste, then use a magnet to absorb the paste, and then adsorb the side of the magnet adsorbing the paste toward the gas pipeline leakage position to the gas pipeline leakage position, so that the gas leakage amount can be controlled, and the reason for using iron powder is that the iron powder is granular and can penetrate into the gap of the gas pipeline leakage position under the pressure of the magnet, and on the other hand, the magnet and the pipeline are closely fitted, and the plugging effect is better. The reason for mixing the iron powder with the paste colloid is to prevent the pressurized gas at the leakage position from blowing the iron powder away. After the magnet is plugged, the upper shell and the lower shell are pre-placed around the pipeline leakage port, and the upper and lower shells are pre-fastened with fasteners. The nitrogen valve 4 and the vent pipe blind plate 7 are opened to purge a small amount of gas in the cavity. Then, the vent pipe blind plate 7 is sealed and closed, and nitrogen is filled into the cavity inside the shell. After the gas leakage is temporarily controlled, the connection between the shell and the pipeline and the connection between the upper and lower shells are sealed and welded.

[0016] The gas pipeline leakage plugging device of the utility model is provided with an adjustment port 8 on the upper shell 3. During the construction process, when the lower shell 2 and the upper shell 3 are hoisted, if an unexpected situation such as touching the magnet occurs, the blind plate 9 of the adjustment port can be opened to observe or reset the plugging situation of the magnet 10, without having to hoist the shell again, thereby facilitating the construction work.

[0017] The gas pipeline leakage plugging device of the utility model has a relatively large length and diameter of the gas pipeline. To adapt to the variable requirements of thermal expansion and contraction, the middle positions of the upper shell 3 and the lower shell 2 are correspondingly provided with protrusions 12.

Claims

1. A gas pipeline leakage blocking device, Features: The invention comprises a lower shell (2), an upper shell (3), a nitrogen pipe (4), a discharge pipe (6), a discharge pipe blind plate (7), an adjustment port (8), an adjustment port blind plate (9), a magnet (10), and iron powder (11); the nitrogen pipe (4) is arranged on the lower shell (2), the discharge pipe (6) and the adjustment port (8) are arranged on the upper shell (3), the discharge pipe blind plate (7) is sealed and fastened to the discharge pipe (6) by fastening bolts, and the adjustment port blind plate (9) is sealed and fastened to the discharge pipe (6). The magnet (10) is attached to the adjustment port (8); after the iron powder (11) is adsorbed onto the magnet (10), the magnet (10) is pressed and adsorbed onto the gas leakage port of the gas pipeline (1); the lower edge of the upper shell and the upper edge of the lower shell are respectively provided with an upper shell flange (13) and a lower shell flange (14); the upper shell flange and the lower shell flange are aligned and pre-tightened using fasteners, and finally sealed and welded; the upper shell (3) and the lower shell (2) are connected to the gas pipeline (1) by welding.

2. A gas pipeline leakage blocking device according to claim 1, Features: The nitrogen pipe (4) is provided with a valve (5), and the valve (5) and the vent pipe blind plate (7) are opened to use nitrogen to purge the cavity enclosed by the lower shell (2) and the upper shell (3).

3. A gas pipeline leakage blocking device according to claim 1, Features: Protrusions (12) are correspondingly arranged at the middle positions of the upper shell (3) and the lower shell (2).

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