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A lock type shaft seal box and its use method

A shaft seal and ship lock technology, which is applied in the direction of engine seal, mechanical equipment, engine components, etc., can solve the problems of changing the packing diameter, unable to guarantee the seal, unable to solve the leakage of dangerous gas to the outside, and achieves high safety and operation. good control effect

Active Publication Date: 2018-09-18
江苏亚盛金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the different-diameter shaft moves in and out of the container, due to the change in diameter, it is obviously impossible to allow the thicker part of the shaft to pass through with a fixed-size gasket or other methods, and the seal cannot be guaranteed.
When the different-diameter shaft equipped with the detection instrument is to be inserted into a container with dangerous gas (such as combustible gas or toxic gas) for detection, due to the different diameters of the shaft, the conventional packing seal shaft cannot move linearly with the shaft However, changing the diameter of the filler cannot solve the problem of dangerous gas leaking to the outside along the shaft

Method used

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  • A lock type shaft seal box and its use method

Examples

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Effect test

Embodiment 1

[0025] A ship lock type shaft seal box, characterized in that: the ship lock type shaft seal box includes a box body 2, the bottom of the box body 2 is connected to the isolation valve 41 arranged at the outlet of the container 4 to be tested through the flange 3, and the box body 2 A detection port 23 is provided on the top, and a first partition 21 and a second partition 22 are arranged inside the box body 2. The first partition 21 is arranged on the top of the second partition 22, and the first partition 21 is provided with a detection The first passage port 211 corresponding to the position and size of the port 23 is also provided with the second passage port 221 corresponding to the position and size of the detection port 23 on the second partition 22, and the inner cavity of the box body 2 is surrounded by the first partition 21 and the second partition 22 are divided into an upper sealing chamber, a gas sealing chamber 7 and a lower sealing chamber from top to bottom, an...

Embodiment 2

[0030] A method for using the lock type shaft seal box in embodiment 1, characterized in that the steps are as follows:

[0031] Step 1. Open the upper exhaust valve 52 and the lower exhaust valve 62, and then close the upper exhaust valve 52 and the lower exhaust valve 62 after emptying the upper inflatable sealing ring 5 and the lower inflatable sealing ring 6;

[0032] Step 2: Insert the front end of the different diameter shaft 1 into the detection port 23, open the upper inflation valve 51 to inflate the upper inflation sealing ring 5, and close the upper inflation valve 51 after the upper inflation sealing ring 5 is in close contact with the surface of the reducing shaft 1;

[0033] Step 3, open the inert gas inflation valve 71, and fill inert gas into the gas sealing cavity 7;

[0034] Step 4: Push the reducing shaft 1 downward until the protruding part of the reducing shaft 1 reaches the detection port 23, open the lower inflation valve 61 to inflate the lower inflatio...

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Abstract

The invention discloses a ship lock type shaft sealing box and a using method thereof. A segmentation closing manner similar to a ship lock type is adopted for the shaft sealing box; partition plates are used for dividing the box body into three sealing cavities; gas inflating sealing rings are arranged in the sealing cavities at the two ends; each sealing cavity is connected with a gas inlet valve, an exhaust valve, a safety valve and a gas pressure gauge; and a flexible filler rope is wound on a different-diameter shaft. Compared with the prior art, the ship lock type shaft sealing box has the following beneficial effects that segmentation passing is adopted for different diameter positions of the shaft, one sealing acts on the shaft all the time, and it is guaranteed that no leakage exists; the sealing pressure is generated in the manner that elastic sealing gas is tightly attached to the exterior of the shaft when bearing the gas pressure effect, and flexible adjustment can be achieved; inputting and withdrawing of upper sealing and lower sealing are completed by the opening and closing action of an external valve, and the operating controllability is good; the middle gas sealing cavity is filled with inert gas for protection, and the safety degree is high; and the flexible filler rope is wound on the exterior of the different-diameter shaft, and the outer surface smoothness of the different-diameter shaft is not required.

Description

technical field [0001] The invention relates to the technical field of shaft sealing, in particular to a ship lock type shaft sealing box and a method for using the same. Background technique [0002] In daily life, many daily necessities need to be sealed. For example, the piston and cylinder of the pump, the push column and injection tube of the syringe, and the piston and cylinder of the vacuum pump have strict requirements on the sealing method. It is necessary to ensure that there is no air leakage when it is stationary, and it must also ensure that it does not leak when it is moving. Gas, the gasket used is not only compressible, but also lubricated and wear-resistant. The relative movement between the parts of pump, syringe and vacuum pump is linear movement, also known as axial movement. The moving parts can be called "shafts", and the stationary cylindrical parts can be called "containers". The part of the "shaft" that enters the "container" is the same in thickn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/16F16J15/32F16J15/3268
CPCF16J15/16F16J15/32F16J15/3268
Inventor 李姣旸
Owner 江苏亚盛金属制品有限公司