CN2235050Y

CN2235050Y - Ball gas-lock valve

Info

Publication number: CN2235050Y
Application number: CN 95217886
Authority: CN
Inventors: 虞瑞鹤; 孙树权
Original assignee: ZHENJIANG POWER STATION AUXILIARY MACHINERY PLANT
Current assignee: ZHENJIANG POWER STATION AUXILIARY MACHINERY PLANT
Priority date: 1995-08-09
Filing date: 1995-08-09
Publication date: 1996-09-11
Anticipated expiration: 2005-08-09

Abstract

The utility model relates to a ball-shaped gas lock valve. A vane type pneumatic opening and closing device is connected with a main valve body via a mounting frame, and a sphere with a bow-shaped section is arranged in the main valve body. A hollow chamber sealing ring is arranged on a contact surface between the main valve body and the sphere with a bow-shaped section, a sealing seat is arranged at one side of the hollow chamber sealing ring, and the sphere can rotate under the condition of no friction via the expansion and the contraction of the hollow chamber sealing ring. Therefore, the utility model has the advantages of little maintenance, convenient installation, favorable sealing performance, long service life, rapidity for opening and closing, etc. The ball-shaped gas lock valve is suitable for media such as gases, liquids, powdery solids, etc.

Description

A kind of spherical air lock

This practical firewood type belongs to the ball valve field, is specifically related to a kind of spherical air lock that can open and close container, pipeline.

At present, the ash disposal mode is done owing to be to carry out in the thermal power plant under low barotropic condition, after outwards carrying a segment distance, the dry ash that ash disposal system is got off electric cleaner concentrates in together, this ash disposal system is more simple and reliable than malleation ash disposal, and air lock is the key equipment in the low malleation ash disposal system, it acts frequently, it is more serious to wear and tear, domestic present employed air lock has slat belt and flat, working life is low, and mean lifetime two was to three months, and the maintenance amount is big, and the maintenance difficulty, so it has had a strong impact on the normal operation of system.In addition, for the pipeline of powdery solid dielectrics such as food, metallurgy, chemical industry, the board-like valve of slat belt peace also can't satisfy its technological requirement.

The purpose of this utility model provides that a kind of wear extent is little, good seal performance, spherical air lock simple in structure.

This sphere air lock, open by the pneumatic start-stop device 1 of blade type, the pneumatic start-stop device 1 of blade type is connected with main valve body 11 by mounting bracket 7, a bow-shaped cross-section spheroid 7 is housed in main valve body 11, these spheroid two ends are connected to upper valve rod 3, lower valve rod 14, upper valve rod 3 is connected with the pneumatic device of blade type, on, lower valve rod is successively by dust ring 10, bearing 12, O-ring seals 13 is fixed on the main valve body 11, the upper end of main valve body is connected with auxiliary valve body, it is characterized in that a cavity seal ring is arranged between the surface of contact of main valve body 11 and bow-shaped cross-section spheroid 7, sealing seat 4 is installed in a side of cavity seal ring.This cavity seal ring is made up of diaphragm seal ring 5 and metal grommet 6, and the diaphragm seal ring is enclosed in the outside of metal grommet, has cleaning source of the gas inlet hole and the recessed road 9 of circumference on auxiliary valve body 8.

The utlity model has following advantage:

1. simple in structure, amount of maintenance is little, easy for installation, by Digital Circuit Control action, the automaticity height;

2. good airproof performance, the sealing surface wear amount is little, and the life-span is long, and time of movement can reach 1,000,000 times;

3. open and close rapidly, fluid resistance is little, and applied range is suitable for media such as gas, liquid, pulverulent solids;

The embodiment of this practicality firewood type is referring to figure below

Fig. 1 is a sectional drawing of the present utility model

Among the figure:

1---the pneumatic start-stop device 2 of blade type---mounting bracket

3---upper valve rod 4---sealing seat

5---diaphragm seal ring 6---metal grommet

7---bow-shaped cross-section spheroid 8---auxiliary valve body

9---cleaning source of the gas inlet hole and the recessed road 10 of circumference---dust ring

11---main valve body 12---bearing

13---O-ring seals 14---lower valve rod

15-end cap

This sphere air lock, open by the pneumatic start-stop device 1 of blade type, the pneumatic device 1 of blade type is connected with main valve body 11 by mounting bracket 2, a bow-shaped cross-section spheroid 7 is housed in main valve body 11, these spheroid two ends are connected to upper valve rod 3, lower valve rod 14, upper valve rod 3 is connected by the pneumatic device of coupling shaft and blade type, on, lower valve rod is successively by dust ring 10, bearing 12, O-ring seals 13 is fixed on the main valve body 11, a cavity seal ring is arranged between the surface of contact of main valve body 11 and bow-shaped cross-section spheroid 7, this cavity seal ring is made up of diaphragm seal ring 5 and metal grommet 6, the diaphragm seal ring is enclosed in the outside of metal grommet, sealing seat 4 is installed in the non-side medium of cavity seal ring, auxiliary valve body 8 is a short tube, one end is connected with main valve body, the other end is connected with the ash collection bucket of deduster, has cleaning source of the gas inlet hole and the recessed road 9 of circumference on auxiliary valve body 8, and end cap 15 is fixed on the end of lower valve rod 14.

When the spheroid of air lock when in the closed position, from cleaning the pressurized air that the source of the gas inlet hole entered for 1 second, along the recessed road cleaning of auxiliary valve body circumference sealing surface, expandable sealing ring expands under the pressurized air effect and contacts tightly with spheroid, cut off the circulation of medium, when air lock is opened, seal ring shrinks earlier, spheroid is under the digital delay circuit effect, by the pneumatic start-stop device rotary driving of blade type, spheroid is in opening state, when the spheroid switching motion, seal ring does not contact with spheroid, thereby has guaranteed the minimal wear of less driving torque and sealing surface.

This sphere air lock can according to the different mining of medium cylinder iron, material such as cast steel, stainless steel, but bow-shaped cross-section spherome surface, main valve body internal surface also coated with hard alloy, durionise, lining tetrafluoro layer etc.

Claims

1. spherical air lock, be connected with main valve body 11 by mounting bracket 2 by the pneumatic start-stop device 1 of blade type, a bow-shaped cross-section spheroid 7 is housed in main valve body 11, these spheroid two ends are connected to upper valve rod 3, lower valve rod 14, upper valve rod 3 is connected with the pneumatic device of blade type, on, lower valve rod is successively by dust ring 10, bearing 12, O-ring seals 13 is fixed on the main valve body 11, the upper end of main valve body is connected with auxiliary valve body, it is characterized in that a cavity seal ring is arranged between the surface of contact of main valve body 11 and bow-shaped cross-section spheroid 7, sealing seat 4 is installed in a side of cavity seal ring, has cleaning source of the gas inlet hole and the recessed road 9 of circumference on auxiliary valve body 8.

2. spherical air lock according to claim 1 is characterized in that its cavity seal ring is made up of diaphragm seal ring 5 and metal grommet 6, and the diaphragm seal ring is enclosed in the outside of metal grommet.