High pressure, constant pressure two-stage rubber membrane sealed gas cabinet

Abstract

The invention discloses a high-pressure and constant-pressure two-section rubber membrane sealing air cabinet which is safer and more reliable. The air cabinet comprises a cabinet body, a T-shaped fence, a piston device and sealing rubber membranes, the T-shaped fence can rise and fall along the inner side of the cabinet body, the piston device can rise and fall along the inner side of the T-shaped fence, the sealing rubber membranes seal joints of the piston device and the T-shaped fence and joints of the T-shaped fence and the cabinet body respectively, the T-shaped fence comprises a T-shaped fence upper baffle plate and a T-shaped fence lower baffle plate, the piston device is limited to slide below the T-shaped fence upper baffle plate, and the T-shaped fence lower baffle plate limits the piston device to slide in the T-shaped fence above the T-shaped fence lower baffle plate, namely, the piston device is limited to slide in the area between the two baffle plates of the T-shaped fence. The high-pressure and constant-pressure two-section rubber membrane sealing air cabinet is small in pressure fluctuation, large in use space, stable in running, safe, reliable and simple in construction, and can effectively solve the problems that the pressure of the two-section rubber membrane sealing air cabinet is unstable, the T-shaped fence is fixedly clamped, the space of a one-section rubber membrane sealing air cabinet is wasted and the like.

Description

Technical field [0001] The invention relates to the field of dry rubber membrane sealed gas holders, in particular to the field of two-stage rubber membrane sealed gas holders and high pressure rubber membrane sealed gas holders. Background technique [0002] At present, rubber membrane sealed gas tanks are mainly one-stage and two-stage. The air pressure balance device of the two-stage rubber membrane sealed gas tank includes the cabinet body, the piston and the T fence. First, the ascending sequence of the T fence and the piston is determined by the air pressure difference between the T fence and the piston. The existing two-stage gas holder, when the air pressure in the T fence is higher than the air pressure in the piston, the T fence rises first. When the T-fence jamming piston device fails to rise smoothly and damages the cabinet body, in order to avoid the T-fence jumping, the movable counterweight of the T-fence needs to be increased, which increases the pressure fluctua...

AI Technical Summary

Problems solved by technology

First, the rising order of the T fence and the piston is determined by the air pressure difference between the T fence and the piston. In the existing two-stage gas cabinet, when the air pressure in the T fence is higher than the air pressure in the piston, the T fence rises first, which is easy If the piston device of the T fence clamping rail cannot rise smoothly and damage the cabinet body, in order to prevent the T fence from jumping up, it is necessary to increase the movable counterweight of the T fence, which will increase the pressure fluctuation of the gas cabinet; there is no T fence in the one-stage gas cabinet. However, due to the waste of space in the upper part of the one-stage gas holder, usually about 35%-45% of the gas holder space under the height-to-diameter ratio cannot be effectively used. To improve the volume utilization of the gas holder, it is necessary to reduce the one-stage The height-to-diameter ratio of the type gas holder, so that the space occupied by the gas holder will increase, which is not economical, and is easily limited by the length of the rubber membrane

Second, when the T-bar of the two-stage rubber membrane sealed gas cabinet falls, it is usually supported by the floor-to-ceiling T-bar stand, and the design of using a separate T-bar stand to support the T-bar is not simple and economical and slightly cumbersome

There is a temporary support frame under the piston system of the two-stage rubber membrane sealed gas cabinet for inspection and operation. During maintenance and cleaning, a temporary support is set between the piston and the bottom plate of the gas cabinet, so that when the piston falls, there is a certain space between the bottom plate of the gas cabinet and it is convenient for workers to operate. ;When installing the temporary support, first raise the piston. After the gas is replaced, disassemble the flange and install the temporary support one by one. After all the temporary supports are installed, drop the piston to complete the installation; After the gas is replaced, the temporary supports are removed one by one, and the flanges are reinstalled; the whole process is time-consuming, laborious and increases safety risks, and the setting of temporary supports is neither environmentally friendly nor economical

[0003] The air inlet and outlet of common two-stage rubber membrane sealed gas cabinets are separated, and the air inlet is directly facing the rubber membrane. Unstable air pressure will often reduce the durability of the rubber membrane and cause the internal pressure of the gas cabinet to fluctuate; while the air outlet pipe generally extends to the inside of the T fence stand, and due to the influence of the air flow inside and outside the air outlet, it often occurs here. The problem of scratching the rubber film will reduce the service time of the rubber film and even cause an accident

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