Quick switch blind plate for preventing stagnant water and corrosion

Abstract

The invention discloses an accumulated water corrosion prevention blind plate capable of being quickly opened and closed. The blind plate mainly comprises a supporting rocker arm, a flange blind cover, a lifting screw, a locking ring, a guard ring, an elastic lock rib and a rotating arm which are mounted on a flange blind seat. The blind plate is structurally characterized in that an inverted cone-shaped annular groove equipped with the flange blind cover is arranged inside the flange blind seat to form a conical surface sealing pair structure; the locking ring and the guard ring are embedded in the flange blind cover to form a blind cover locking structure; a group of water seepage holes are formed in the flange blind seat; and large areas of the locking ring and the guard ring are exposed under the working condition that the blind cover is guaranteed to be tightly locked, so that impurity cleaning and maintenance operation are facilitated, and even though connecting bolts are blocked due to corrosion, the blind plate can be opened through manually levering the locking ring. The blind plate has the prominent advantages that the structure is simple, the production cost is low, the mounting and utilization are convenient, the accumulated water drainage effect is good, the corrosion resistance is high, the opening operation is easy and effort-saving, the operation is reliable, the sealing performance is good, the operation is stable, and the service life is long, and the blind plate has quite good application prospect.

Description

technical field [0001] The invention relates to a blind plate device, which belongs to the technical field of auxiliary equipment for pressure vessels, in particular to a rapid switch blind plate for preventing stagnant water and corrosion, which is especially suitable for installation and use on various pressure vessels and pipeline equipment. Background technique [0002] The so-called blind device (also known as manhole device) is an auxiliary equipment widely used in various pressure vessels and pressure pipelines. Its main function is to facilitate the opening or closing of pressure vessels and pipeline equipment to facilitate Workers enter the closed container or pipeline for regular cleaning and maintenance operations, which is a necessary technical measure to effectively maintain the long-term normal operation of pressure vessels and pipeline equipment. It is understood that the most commonly used blind device is composed of a flange seat fixedly connected to the con...

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Problems solved by technology

However, in our long-term research and development of pressure vessel blind device products, we also found that this "lock ring type quick opening and closing blind device" still has some defects in use in actual operation. The main manifestations are: because the lock ring is It has been in the closed space of the buried groove between the blind pipe flange seat and the blind plate cover. In the open-air environment, rainwater will accumulate in the groove of this buried structure for a long time, and there will also be some tiny soil impurities. Falling into and accumulating in the groove, that is to say, the lock ring is soaked in the accumulated cement and soil impurities in the groove for a long time, and the electrochemical corrosion "stuck" phenomenon is easy to occur. When the locking mechanism cannot push the lock ring When opening the operation, the worker cannot pry the lock ring buried in the closed space of the groove from the outside

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