A sealing mechanism against gas exchange

Abstract

The invention relates to a sealing mechanism preventing gas exchange. The sealing mechanism comprises a stress block (3), a pressing block (4) and a compressing mechanism (5), wherein the stress block (3) is connected with a fixed part (1) and is in clearance fit with a rotating part (2); the pressing block (4) is in clearance fit with the rotating part (2) in a rotating mode; the compressing mechanism (5) is fixedly connected with the rotating part (2); the pressing block (4) presses the stress block (3) through the compressing mechanism; the stress block (3) is provided with a first sealing strip (3c); a second sealing strip (4e) is placed in a cavity (4d) of the pressing block (4); a first gap (2a) formed between the pressing block (4) and the outer wall surface of the rotating part (4) is sealed through the second sealing strip (4e); a threaded rod (7a) of a compressing screw (7) of the compressing mechanism (5) applies pressure to a force applying surface (4a2) of the pressing block (4), and the pressing block (4) compresses the first sealing strip (3c) of the stress block (3) through a first pressing surface (4a2) of a compressing surface (4a1) so that a second gap (8) formed between the pressing block (4) and the stress block (3) can be sealed. The sealing function is achieved through the simple mechanical sealing mechanism, gas exchange through the gap formed between the fixed part and the rotating part is prevented, in this way, external gas is prevented from entering the rotating part through the gap, and meanwhile gas inside the rotating part is prevented from leaking outwards through the gap.

Description

technical field [0001] The invention relates to a sealing mechanism for preventing gas exchange, in particular to a sealing mechanism for preventing gas from being exchanged through the gap formed between the body and the rotating body. The invention also relates to a rotary machine having such a sealing mechanism; more particularly, to a rotary furnace having such a sealing mechanism. Background technique [0002] The invention of the application number 201320497216.4 published on January 29, 2014 discloses a device for carbonization treatment and carbon recovery of oil refinery sludge. The front unit is an external heat dryer, and the dryer is equipped with a dryer jacket. (2); the carbonization unit is an externally heated rotary carbonization furnace (3), and the rotary carbonization furnace (3) is provided with a rotary carbonization furnace jacket (4). Refinery sludge is pyrolytically carbonized in a rotary carbonization furnace, which needs to maintain an oxygen-defi...

AI Technical Summary

Problems solved by technology

figure 1 A schematic diagram showing the traditional body, such as figure 1 As shown, the furnace body 2 of the rotary carbonization furnace needs to be arranged on the body 1 with a rotatable gap, so there must be a gap at the connection between the furnace body 2 of the rotary carbonization furnace and the body 1 that fixes the rotary carbonization furnace, which will cause the rotation The gas in the furnace body 2 of the carbonization furnace will flow out from the gap between the furnace body 2 and the body 1, or the outside air will enter the furnace body 1 through the gap

[0003] In the actual use process, if gas exchange occurs at the connection between the furnace body 2 and the body 1 of the rotary carbonization furnace, that is, the external air enters the rotary carbonization furnace from this connection, the oxygen-deficient environment in the carbonization furnace may be destroyed , affecting the pyrolysis and carbonization process of sludge. At the same time, due to the entry of air, the flammable active gas in the pyrolysis gas may explode under the action of oxygen, and there are certain safety hazards.

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