CN210088154U - Sealed telescopic pad assembly - Google Patents

Abstract

The utility model relates to a sealed flexible pad assembly is applicable to on the sealed flapper door of flue gas, the vertical inflation and the sealing of axle and axle sleeve. The technical problem that the shaft and the shaft sleeve expand and seal longitudinally after being heated can be solved. The corrugated pipe gasket comprises a hollow annular gasket structure, wherein the annular gasket structure consists of annular sheets on the left side and the right side and a corrugated pipe body clamped between the two annular sheets; the corrugated pipe body comprises an outer ring corrugated pipe as the outer wall of the pipe body and an inner ring corrugated pipe as the inner wall of the pipe body, and a gap is reserved between the outer ring corrugated pipe and the inner ring corrugated pipe.

Description

Sealed telescopic pad assembly

Technical Field

The utility model relates to a sealed flexible pad assembly is applicable to on the sealed flapper door of flue gas, the vertical inflation and the sealing of axle and axle sleeve.

Background

The smoke sealing baffle door is applied to the flue of coal-fired boilers in power plants, heating industry, waste heat boilers and chemical industry, and is used for blocking and shunting smoke. More important for the flue gas sealing of the baffle door is the thermal expansion of the baffle door, and more important is the longitudinal thermal expansion of the inner shaft and the shaft sleeve of the baffle door.

The application of the existing sealing gasket structure is shown in figure 1, and the sealing gasket structure is arranged between a packing box and a shaft sleeve of a high-temperature flue gas baffle, and blades of the baffle sequentially penetrate through the packing box, the sealing gasket and the shaft sleeve; the sealing ring structure can basically meet the working condition requirement of the smoke sealing baffle door below 200 ℃, but has the following defects.

1. The sealing gasket is usually made of polytetrafluoroethylene or packing materials, and is easy to deform and age when the temperature is too high.

2. The sealing gasket is limited by materials and structures, and is longitudinally expanded by the shaft sleeve and the baffle door shaft when the temperature is too high, so that the generated thermal state is deformed and cannot be restored, and the leakage rate of the baffle door is increased.

Disclosure of Invention

The utility model discloses be exactly to the defect that prior art exists, provide a sealed flexible pad assembly, be applicable to the sealed flapper door of flue gas on, can solve axle and axle sleeve and be heated the sealed technological problem of back longitudinal expansion.

In order to achieve the purpose, the utility model adopts the following technical scheme that the gasket comprises a hollow annular gasket structure and is characterized in that the annular gasket structure consists of annular sheets at the left side and the right side and a corrugated pipe body clamped between the two annular sheets; the corrugated pipe body comprises an outer ring corrugated pipe as the outer wall of the pipe body and an inner ring corrugated pipe as the inner wall of the pipe body, and a gap is reserved between the outer ring corrugated pipe and the inner ring corrugated pipe.

As a preferred scheme of the utility model, the ring piece is a stainless steel ring piece.

As another preferable scheme of the utility model, the thickness of ring piece is 0.5 mm.

As another preferred scheme of the utility model, the thickness of outer loop bellows is 0.35 mm.

As another preferred scheme of the utility model, the thickness of inner ring bellows is 0.35 mm.

As another preferred scheme of the utility model, the material of outer loop bellows and inner ring bellows adopts stainless steel.

Compared with the prior art the utility model discloses beneficial effect.

The utility model discloses a sealed flexible pad assembly, install between the packing box and the axle sleeve of high temperature flue gas baffle, the blade of baffle passes packing box, sealed flexible pad and axle sleeve in proper order; the technical problem that the shaft and the shaft sleeve expand and contract longitudinally under high temperature can be effectively solved, the shaft can rotate freely without blocking, and the baffle door can be normally opened and closed under the high temperature state.

The utility model discloses a sealed flexible pad assembly uses on the gas seal flapper door, can ensure the normal rotation of axle under high temperature state, has guaranteed the sealing performance of sealed pad assembly when flexible.

The utility model discloses a sealed flexible pad assembly material is stainless steel alloy material, has solved the low temperature acid corrosion of high temperature flapper door when the condensation.

The utility model discloses a sealed flexible pad assembly is applicable to rectangle high temperature flue gas seal flapper door, also is applicable to circular high temperature flue gas seal flapper door.

Drawings

The present invention will be further described with reference to the accompanying drawings and the following detailed description. The scope of protection of the present invention is not limited to the following description.

Fig. 1 is a schematic view of the presently disclosed smoke damper gasket of the present invention.

Fig. 2 is a schematic view of the assembly of the sealing expansion pad of the present invention.

Fig. 3 is an expansion and contraction schematic diagram of the sealing and expansion pad of the present invention.

Fig. 4 is the sealing expansion pad assembly of the present invention.

Fig. 5 is a front view of the telescopic mat of the present invention.

Fig. 6 is a left side view of the utility model of a telescopic mat.

Fig. 7 is a plan view of the retractable mat of the present invention.

In the figure, 1 is a valve body, 2 is a blade, 4 is a frame, 5 is a sealing gasket, 6 is a shaft sleeve, 7 is a shaft, 8 is a packing box, 10 is an outer ring corrugated pipe, 11 is a ring sheet, 12 is an inner ring corrugated pipe, and 13 is a telescopic gasket.

Detailed Description

As shown in fig. 1, a conventional gasket 5 for a flue gas sealing damper is shown in fig. 1, wherein a stuffing box 8 for shaft sealing is fixed on a valve body 1 (outer housing) of the flue gas damper, and when a shaft 7 of a blade rotates, the blade is driven to rotate around the shaft 7 in a frame 4, so as to realize opening and closing. The existing packing is fitted between the stuffing box 8 and the bushing 6. The effect is as follows.

1. When the shaft sleeve 6 of the rotating shaft and the shaft 7 are assembled together and fixed into a whole by the pin shaft, when the rotating shaft 7 rotates in the frame 4, the sealing gasket 5 is separated from the stuffing box 8, thereby realizing the rotation of the shaft 8.

2. The dynamic and static sealing function between the shaft sleeve 6 and the stuffing box 8 is realized.

3. The longitudinal extension and contraction of the stuffing box 8, the shaft 7 and the shaft sleeve 6 after being heated are realized.

However, the existing sealing gasket has almost no expansion and has a common sealing effect, and the utility model is improved based on the structure, as shown in fig. 2-7, and comprises a hollow annular gasket structure, wherein the annular gasket structure consists of ring sheets 11 at the left side and the right side and a corrugated pipe body clamped between the two ring sheets 11; the corrugated pipe body comprises an outer ring corrugated pipe 10 serving as the outer wall of the pipe body and an inner ring corrugated pipe 12 serving as the inner wall of the pipe body, and a gap is reserved between the outer ring corrugated pipe 10 and the inner ring corrugated pipe 12.

Preferably, the ring plate 11 is a stainless steel ring plate.

Preferably, the thickness of the ring plate 11 is 0.5 mm.

Preferably, the thickness of the outer ring bellows 10 is 0.35 mm.

Preferably, the thickness of the inner ring bellows 12 is 0.35 mm.

Preferably, the outer bellows 10 and the inner bellows 12 are made of stainless steel.

Specifically, the left and right surfaces of the sealing expansion pad 13 are annular parallel planes, the inner and outer circles of the side surfaces are in a corrugated pipe shape, the two parallel annular stainless steel ring pieces 11 with the thickness of 0.5mm are adopted, and the side surfaces are formed by stamping an outer annular corrugated pipe 10 with the thickness of 0.35mm and an inner annular corrugated pipe 12 with the thickness of 0.35 mm. The sealed stretchable pad 13 was molded to have L =12 mm. The sealing expansion pad 13 assembly is assembled on the smoke sealing baffle door, as shown in fig. 2 and 3, after the assembly is heated, the total length L is compressed from 12mm to L =8mm, and the sealing performance between the stuffing box 8 and the inner ring corrugated pipe 12 is maintained. The length L of the sealing telescopic pad 13 changes along with the temperature of the smoke sealing baffle door, and the designed telescopic compensation quantity of L is 0-3 mm.

The high-temperature sealing telescopic pad assembly is assembled on the smoke sealing baffle door, so that the inner ring corrugated pipe 12 can flexibly rotate at a high temperature, and the sealing telescopic pad 13 assembly is made of a stainless steel sheet, so that elastic deformation is still kept at a high temperature, the sealing performance of the stuffing box 8 and the inner ring corrugated pipe 12 at a high temperature is ensured, and meanwhile, the low-temperature acid corrosion of the high-temperature smoke sealing baffle door at a condensation state is also overcome. The service life of the smoke sealing baffle door is prolonged. The technical problem of expansion sealing of the high-temperature smoke sealing baffle door is solved.

It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.

Claims (6)

1. A sealed gasket assembly including a hollow annular gasket structure; the annular gasket structure is characterized by comprising ring sheets on the left side and the right side and a corrugated pipe body clamped between the two ring sheets; the corrugated pipe body comprises an outer ring corrugated pipe as the outer wall of the pipe body and an inner ring corrugated pipe as the inner wall of the pipe body, and a gap is reserved between the outer ring corrugated pipe and the inner ring corrugated pipe.

2. The seal cartridge assembly of claim 1, wherein: the ring piece is a stainless steel ring piece.

3. The seal cartridge assembly of claim 1, wherein: the thickness of the ring piece is 0.5 mm.

4. The seal cartridge assembly of claim 1, wherein: the thickness of outer ring corrugated pipe is 0.35 mm.

5. The seal cartridge assembly of claim 4, wherein: the thickness of the inner ring corrugated pipe is 0.35 mm.

6. The seal cartridge assembly of claim 1, wherein: the outer ring corrugated pipe and the inner ring corrugated pipe are made of stainless steel.

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