CN201184467Y

CN201184467Y - Rectangle piston type compensator

Info

Publication number: CN201184467Y
Application number: CNU2008200076782U
Authority: CN
Inventors: 王行山
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-03-26
Filing date: 2008-03-26
Publication date: 2009-01-21
Anticipated expiration: 2018-03-26

Abstract

The utility model relates to a rectangular piston type compensator used in a thermal power plant and an industrial boiler gas duct, which belongs to the thermal expansion compensation technical field of a flue gas pipeline and is characterized in that a joint tube is fixedly connected with one end of an outer coating, the other end of the outer coating is fixedly connected with a flange; a packing retaining ring is fixedly arranged on the inner surface of the outer coating; one end of a core tube is arranged inside the outer coating; sealing packing is filled between the core tube and the outer coating; a packing device is sleeved on the core tube; the packing device and the flange are connected through a threaded bolt; the core tube slides to and fro inside the outer coating; a guide shell is fixedly arranged in a compensation displacement region of the joint tube and the core tube. In the rectangular piston type compensator, because the joint tube and the outer coating are fixedly connected into a whole, the flange is welded at one end of the outer coating, the packing retaining ring is welded inside the outer coating, and the sealing packing is completely filled between the core tube and the outer coating. The compensation method of the compensator is that the core tube performs the expansion displacement on the sealing packing in the outer coating when the temperature changes, a displacement compensator has small stress, and the time is short, the compensator can operate under the low stress, so the service life is prolonged.

Description

Rectangle piston formula compensator

One, technical field

The utility model relates to a kind of rectangle piston formula compensator, is used for thermal power plant and industrial boiler cigarette air channel, belongs to fume pipe heat expansion compensation technique field.

Two, background technique

The rectangle slip joint of sale or people application in the market all is the rectangle corrugated expansion joint, and corrugated expansion joint is a kind of first body of working down in heavily stressed (stress is greater than yield), works in mordant surrounding medium and easily causes stress corrosion to destroy.But flue gas all is mordant, that is to say that Korrosionsmedium is forever to exist, and the extent of corrosion difference that difference is medium.Therefore, the danger that the rectangle FlexbleJoint always has stress corrosion to destroy, and this destruction always at first begins corrosion at crest, the trough position of bellows, because these two positions are out of shape maximum at work, the zone of stress maximum, surpass yield limit because the suffered stress of corrugated expansion joint is very big, and when boiler operatiopn the long-term high-stress state that keeps, working life is short.

Three, summary of the invention

The purpose of this utility model is to provide a kind of and works under low stress, the rectangle piston formula compensator of long service life.

Technical solution: the utility model adapter, core pipe, guide shell, take over and fixedly connected with an end of overcoat, the other end of overcoat is fixedlyed connected with flange, be installed with packing retaining ring on the internal surface of overcoat, an end of core pipe places overcoat inside, is full of stuffing box packing between core pipe and the overcoat, differential is sleeved on the core pipe, differential and flange are by Bolt Connection, and the core pipe reciprocatingly slides in overcoat, and the compensate for displacement district of adapter, core pipe is installed with guide shell.

Adapter, overcoat, packing retaining ring, flange are welded into an assembly.

Space length between adapter and the core pipe is attainable compensate for displacement district.

Guide shell is fixedlyed connected with the core pipe.

Guide shell is fixedlyed connected with adapter.

The utility model is because adapter is connected to one with overcoat, and an end of overcoat is welded with flange, and inside is welded with packing retaining ring, is full of filler between core pipe and the overcoat.This compensation method is: telescopic displacement in the stuffing box packing of core pipe in overcoat during temperature variation, and this motion compensator stressed very little, and the time is very short, compensator can be worked under low stress, so prolonged working life.

Four, description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model profile.

Five, embodiment

Adapter 1 of the present utility model fuses with overcoat 2, one end of overcoat 2 is welded with flange 5, and inside is welded with packing retaining ring 3, and the part of core pipe 7 places in the overcoat 2, be full of stuffing box packing 4 between core pipe 7 and the overcoat 2, differential 6 is sleeved on the core pipe 7, the stuffing box packing appropriateness can be compressed, and differential 6 is used Bolt Connection with flange 5, core pipe 7 reciprocatingly slides in overcoat 2, when guide shell 8 welded with adapter 1, flue gas flowed into from taking over 1, flows out from core pipe 7 through guide shell 8.If when being welded on guide shell 8 on the core pipe 7, then flue gas flows into from core pipe 7, flows out from taking over 1 end through guide shell 8.When normal temperature is installed, the two ends of compensator and fume pipe welding, during boiler operatiopn, because the temperature height of flue gas, the length of pipeline will be extended, and core pipe 7 is contracted to the compensate for displacement district of core pipe, and length change is compensated.

Claims

1, rectangle piston formula compensator, comprise: take over (1), core pipe (7), guide shell (8), it is characterized in that: take over (1) and fixedly connected with an end of overcoat (2), the other end of overcoat (2) is fixedlyed connected with flange (5), be installed with packing retaining ring (3) on the internal surface of overcoat (2), one end of core pipe (7) places overcoat (2) inside, be full of stuffing box packing (4) between core pipe (7) and the overcoat (2), differential (6) is sleeved on the core pipe (7), differential (6) and flange (5) are by Bolt Connection, core pipe (7) reciprocatingly slides in overcoat (2), takes over (1), the compensate for displacement district of core pipe (7) is installed with guide shell (8).

2, rectangle piston formula compensator according to claim 1 is characterized in that: adapter (1), overcoat (2), packing retaining ring (3), flange (5) are welded into an assembly.

3, rectangle piston formula compensator according to claim 1 is characterized in that: the space length of taking between (1) and the core pipe (7) is attainable compensate for displacement district.

4, rectangle piston formula compensator according to claim 1 is characterized in that: guide shell (8) is fixedlyed connected with core pipe (7).

5, rectangle piston formula compensator according to claim 1 is characterized in that: guide shell (8) is fixedlyed connected with adapter (1).