Sealing device for gas tank

Abstract

The invention discloses a sealing device for a gas tank. The sealing device comprises two groups of seal assemblies and a rubber suspension mechanism, wherein the two groups of seal assemblies are arranged along the axial direction of a gas tank in parallel; the rubber suspension mechanism is fixed on a piston box beam and a rubber compaction mechanism; a connecting rod of the rubber compaction mechanism is articulated with a rubber clamping mechanism of the seal assemblies, so that a sealed rubber strip can cling to the inner wall of the side plate of the tank; and a rollover protection baffle is arranged between the sealed rubber strip and the piston box beam. According to the invention, the rollover protection baffle is used to limit and avoid the rollover of the seal assemblies, the maximum running speed of the piston can be increased to above 3m / min (3-7m / min) and the piston can continuously run for a certain time, thus the gas tank can perform important functions of automatically stabilizing pipe network pressure and coal gas user thermal regulation, improving the security of the operation of the coal gas system, and saving energy and being environmentally-friendly, therefore, the invention is especially applied to the coal gas pipe network system with the requirements on a larger throughput of coal gas (faster speed of piston) and a continuous running for some time.

Description

technical field [0001] The invention belongs to the technical field of sealing, and in particular relates to a gas cabinet sealing device. Background technique [0002] With the development of large-scale blast furnaces in the metallurgical industry, the main user of blast furnace gas, the power plant, is also tending to be large-scale, which requires that the throughput of the gas cabinet serving the gas transmission and distribution system must be large, that is, the piston speed is fast, and it must continue to run for a period of time. Time, to ensure the time required for gas dispatching and user switching fuel, etc., to ensure the safe production and operation of the gas system and reduce the gas emission rate to the greatest extent. For example, 5000m 3 When the blast furnace suddenly shuts down, the gas tank needs to replenish about 750,000 m to the pipe network 3 Gas volume per hour, corresponding to 150,000 m 3 The piston speed of the gas holder is about 6m / mi...

AI Technical Summary

Problems solved by technology

However, when the piston descends at a fast speed, due to the welding deformation and local deformation of the side plate of the cylinder, the sealing assembly may tip over to the piston box beam around the contact point between the bottom edge of the sealing rubber strip and the side plate. Part of the assembly tilts towards the piston box beam, and the horizontal force transmitted by the rubber pressing mechanism to the sealing rubber strip through the connecting rod is greatly reduced, causing the sealing assembly to fail to reset. If the piston continues to descend, the adjacent rubber pressing The sealing components at the mechanism position will be overturned in this way, forming a domino effect, resulting in seal failure; at the same time, when the piston descends rapidly, the oil attached to the side plate increases, resulting in insufficient sealing oil level in the piston oil groove, which will also lead to seal failure. Increase the oil level of the piston oil channel to solve the problem, but the simple increase of the oil level of the piston will increase the differential pressure between the upper and lower sides of the sealing canvas, the pressure of the sealing rubber strip on the side plate of the cylinder will increase, the wear of the sealing rubber strip will increase, and the tipping may occur Increased reliability, decreased safety and shortened life of the piston seal

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