Multi-level sealing device
A technology of sealing device and sealing cavity, which is applied in shaft sealing, valve device, engine sealing and other directions, and can solve problems such as inappropriate sealing.
Inactive Publication Date: 2014-12-17
LIAOYANG PUMP IND SEAL
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Problems solved by technology
However, the technical solution of this patent is not applicable to the sealing of equipment with a diameter exceeding 300mm
[0005] At the same time, due to the progress and development of science and technology, the requirements for equipment sealing are increasingly developing towards the requirements of large shaft diameter, long life, less disassembly and less production stoppage, so the existing packing seals, mechanical seals and hydraulic seals are not suitable. this need
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[0033] The specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing:
[0034] Such as figure 1 , figure 2 and Figure 3 (including Figure 3a with Figure 3b ), a multi-stage sealing device includes a sealing cavity 100, the sealing cavity 100 is a tubular body with a through hole, and one end of the sealing cavity 100 is provided with a mounting flange 101, the multi-stage sealing device It can be installed on external equipment that needs to be sealed through the installation flange 101. The mounting flange 101 is provided with a plurality of mounting holes 102 , and is fixedly connected with external equipment through bolts 60 . In order to ensure the sealing effect of installation with external equipment, an annular sealing ring 50 is provided at one end of the flange 101 of the sealing cavity. At the same time, a sealing end cover 70 is provided at one end of the sealing chamber flange 101 to realize effective...
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The invention discloses a multi-level sealing device and relates to the technical field of equipment sealing. The multi-level sealing device comprises three sealing structures, wherein a first sealing structure is arranged at one side near a sealing cavity flange, and comprises a helical wheel, a gas valve, a gas-pressure meter and a first one-way valve; a second sealing structure is arranged at one side far away from the sealing cavity flange, and comprises multiple pieces of packing, a gland and a gland adjustment unit; a third sealing structure is arranged between the first sealing structure and the second sealing structure, and comprises a second one-way valve and a flow uniform distribution sleeve. According to the multi-level sealing device, through the installation of the sealing structures of three levels, the sealing problem of large equipment of which the diameter is greater than 300mm is effectively solved, and meanwhile, the sealing operation of the equipment under a non-disassembly state can be realized; the first sealing structure and the third sealing structures are both injection-type flexible liquid sealing structures, and the second sealing structure is a packing-type sealing structure; the sealing structures of the multi-level sealing device disclosed by the invention are split, so that the sealing structures can be conveniently disassembled for maintenance.
Description
technical field [0001] The invention relates to the technical field of equipment sealing, in particular to a multistage sealing device including liquid sealing and stuffing sealing. Background technique [0002] Although the packing seal has a history of more than 1,000 years, it is still used in many equipments, such as reciprocating shaft wellhead sealing equipment, reciprocating pump shaft seals, and large-size circumferential seals exceeding 300 mm. Most of the mechanical seals have replaced the first generation of packing seals, such as pump seals, rotary shaft seals for kettles, etc. However, mechanical seals cannot be used for seals with shaft diameters exceeding 300mm, because all sealing rings, whether pressed or sintered , There is not such a large processing and manufacturing equipment. [0003] At present, mechanical seals also have many deficiencies, such as: 1. The service life of the seal cannot keep up with the two-to-three-year maintenance period of the che...
Claims
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Login to View More IPC IPC(8): F16J15/16F16J15/40F16K41/02
Inventor 马卫东
Owner LIAOYANG PUMP IND SEAL