CN212584532U - Non-metal expansion joint - Google Patents

Abstract

The utility model discloses a nonmetal expansion joint, an outlet connecting pipe is sleeved with a left frame, an inlet connecting pipe is sleeved with a right frame, the right end face of the outlet connecting pipe is provided with a left side plate, the left end face of the inlet connecting pipe is provided with a right side plate, a sealing rope is sleeved outside the circumference of an ash-proof layer and is externally provided with a hoop, a support plate is arranged between the sealing rope and the ash-proof layer, a guide plate is arranged inside the inner circle of the right side plate and is fixed with the ash-proof layer by a V-shaped steel nail, a wear-resistant layer is arranged inside the guide plate, a third thermal-insulating layer is filled between the right frame and the left side plate, a second thermal-insulating layer is filled between the left frame and the right frame and is externally provided with a skin wrapping, two ends of the skin are respectively fixed with the left frame and the right frame, the central line of a medium circulation pipeline formed by the outlet connecting pipe and the inlet connecting pipe connected by the, and has the requirements of high temperature resistance and abrasion resistance.

Description

Non-metal expansion joint

Technical Field

The utility model relates to a nonmetal expansion joint.

Background

The nonmetal expansion joint of the gas turbine power plant is generally arranged in a gas turbine outlet diffusion section, a waste heat boiler inlet flue, a waste heat boiler outlet flue and other areas, wherein the gas turbine outlet diffusion section and the waste heat boiler inlet flue are provided with high-temperature media, working conditions such as high over-temperature prevention difficulty and large three-dimensional compensation amount are achieved, meanwhile, the connection positions of a high-temperature hearth, a material returning device and an external bed ash pipeline can generate displacement due to settlement and left-right movement of an absorption hearth in long-term operation, the conventionally arranged expansion joint is generally of an axial or radial independent buffering structure or mainly buffers a single direction in the axial direction or the radial direction, the buffer room in the other direction is very small, and the expansion joint does not have buffer in any direction of all directions, namely the axial direction and the radial direction, so that the expansion joint with a new structure is required to have larger.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, and provides a non-metal expansion joint which is used for connecting a hearth, a material returning device and an external bed ash channel pipeline and can freely move along the radial direction and the axial direction, an outlet connecting pipe is sleeved with a left frame, an inlet connecting pipe is sleeved with a right frame, the right end surface of the outlet connecting pipe is provided with a left side plate, the left end surface of the inlet connecting pipe is provided with a right side plate, the outer position of the circumference of the ash-proof layer is sleeved with a sealing rope and is externally provided with a hoop, a support plate is arranged between the sealing rope and the ash-proof layer, the inner circle of the right side plate is provided with a guide plate and is fixed with the ash-proof layer by a V-shaped steel nail, the inner circle of the guide plate is provided with a wear-resistant layer, a third thermal-insulating layer is filled between the right frame and the left frame, the left frame and the right frame are externally provided with a skin package, two ends, the utility model discloses using in furnace and feed back ware, external bed ash duct tube coupling, absorbing furnace subsides and controls the displacement that produces about, and has high temperature resistant and stand wear and tear requirement.

In order to achieve the above purpose, the technical scheme of the utility model is that: the non-metal expansion joint is characterized in that an outlet connecting pipe is sleeved with a left frame, an inlet connecting pipe is sleeved with a right frame, a left side plate is arranged on the right end face of the outlet connecting pipe and fixed by a plurality of Y-shaped steel nails, and a first heat insulation layer is arranged between the left side plate and the left frame;

the left end face of the inlet connecting pipe is provided with a right side plate and fixed by a plurality of Y-shaped steel nails, an ash prevention layer is arranged between the right side plate and the left side plate, a sealing rope is sleeved outside the circumference of the ash prevention layer, a hoop is arranged outside the circumference of the sealing rope, a supporting plate is arranged between the sealing rope and the ash prevention layer, a guide plate is arranged on the inner ring of the right side plate and fixed with the ash prevention layer by the V-shaped steel nails, and a wear-resistant layer is arranged on the inner circumference of the guide plate;

and a third heat insulation layer is filled between the right frame and the left side plate, a second heat insulation layer is filled between the left frame 1 and the right frame 5, a skin is arranged outside the heat insulation layer for wrapping, and two ends of the skin are respectively fixed with bolt fasteners after covering the outer circumferences of the left frame and the right frame and arranging pressing strips on the outer circumferences of the left frame and the right frame.

Further, the arch shape of the skin faces outwards when the skin is installed.

And further setting, the included angle between the central line of the medium circulation pipeline formed by the outlet connecting pipe and the inlet connecting pipe which are connected by the nonmetal expansion joint and the horizontal plane can be adjusted by applying external force.

The utility model has the advantages that: the utility model discloses use in furnace and feed back ware, external bed ash duct tube coupling, absorb furnace subsides and remove the displacement that removes the production about, and have high temperature resistant and stand wear and tear requirement.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of fig. 1 without radial and axial displacement.

In the figure: the heat insulation structure comprises a left frame 1, a first heat insulation layer 2, a second heat insulation layer 3, a third heat insulation layer 4, a right frame 5, a left side plate 6, a hoop 7, a right side plate 8, a supporting plate 9, a guide plate 10, an ash prevention layer 11, V-shaped steel nails 12, Y-shaped steel nails 13, a sealing rope 14, a skin 15, a pressing strip 16, a bolt fastener 17, a wear-resistant layer 18, an inlet connecting pipe 19 and an outlet connecting pipe 20.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

As shown in fig. 1, in the non-metal expansion joint, an outlet connecting pipe 20 is sleeved on a left frame 1, an inlet connecting pipe 19 is sleeved on a right frame 5, a left side plate 6 is arranged on the right end face of the outlet connecting pipe 20 and is fixed by a plurality of Y-shaped steel nails 13, so that the left side plate 6 and the outlet connecting pipe 20 are fixed into a whole, and a heat insulation layer I2 is arranged between the left side plate 6 and the left frame 1;

the left end face of the inlet connecting pipe 19 is provided with a right side plate 8 and fixed by a plurality of Y-shaped steel nails 13, so that the inlet connecting pipe 19 and the right side plate 8 are fixed into a whole, an ash prevention layer 11 is arranged between the right side plate 8 and the left side plate 6, a sealing rope 14 is sleeved outside the circumference of the ash prevention layer 11, an anchor ear 7 is arranged outside the circumference of the sealing rope 14, a support plate 9 is arranged between the sealing rope 14 and the ash prevention layer 11, a guide plate 10 is arranged on the inner ring of the right side plate 8 and fixed with the ash prevention layer 11 by V-shaped steel nails 12, and a wear-resistant layer 18 is arranged on the;

a third insulating layer 4 is filled between the right frame 5 and the left side plate 6, a second insulating layer 3 is filled between the left frame 1 and the right frame 5, a skin 15 is arranged outside the second insulating layer 3, two ends of the skin 15 are respectively fixed by bolt fasteners 17 after covering the outer circumferences of the left frame 1 and the right frame 5 and arranging pressing strips 16 on the outer circumferences of the left frame 1 and the right frame 5, the right frame 5 and the left side plate 6 are connected, an inlet connecting pipe 19 and an outlet connecting pipe 20 are synchronously connected, and the middle non-metal expansion joint is connected in a universal connection mode, wherein the universal connection mode can be achieved through large-amplitude displacement and change in.

The arch of the skin 15 faces outward when installed.

The included angle between the central line of a medium circulation pipeline formed by the outlet connecting pipe 20 and the inlet connecting pipe 19 which are connected by the nonmetal expansion joint and the horizontal can be adjusted by applying external force, and when the hearth, the material returning device and the external bed ash pipeline are connected and are displaced due to sedimentation, adaptive angular deformation and self-adaption can be automatically generated on the displacement generated by axial and radial movement.

The utility model discloses use in furnace and feed back ware, external bed ash duct tube coupling, absorb furnace subsides and remove the displacement that removes the production about, and have high temperature resistant and stand wear and tear requirement.

When the non-metal expansion joint is applied and installed in the initial stage, the non-metal expansion joint is connected in a straight pipe shape as shown in figure 2, and the installation angle can be adjusted in a self-adaptive mode according to the installation errors of a hearth, a material returning device and an external bed ash pipeline.

Example of the implementation

In practical application, the nonmetal expansion joint can adjust the interface or size adaptively according to the difference of application occasions, and in design and application:

1. parameter conditions are as follows:

a. designing pressure: p is 9 Kpa;

b. design temperature: t is 1050 ℃;

c. axial displacement: Δ x is 60 mm;

d. transverse displacement: Δ y320 mm;

△z＝110mm；

2. interface type:

a. the non-metal expansion joint of the feed back device is elliptical, the caliber is large (the long axis 3200 and the short axis 2490 are provided, the joints at the two ends are not on the same axis), and the non-metal expansion joint is inclined at 8.43 ℃.

b. The external bed nonmetal expansion joint is in a nonstandard trapezoid shape, has a large caliber (length 3250 and height 3000, and the two end joints are not on the same axis), and is inclined at 8.19 ℃.

3. Design structure

3.1. Considering the characteristics of high temperature resistance and wear resistance, the inner side and the flue gas contact materials are all made of the S U S310S steel nails, and the castable is poured with the pipeline at the same time, so that the inner side plate, the guide plate and the castable are tightly fixed together, and the wear resistance requirement identical to that of the pipeline is met.

3.2. The ceramic fiber cloth is used for coating the high-temperature resistant ceramic wool outside the flow guide pipe, and the stainless steel nail is tightly fixed on the side plate to play a role in preventing dust.

3.3. One end of the inner side plate is welded with a circle of supporting plate, but the absorption of axial displacement is not influenced,

3.4. two circles of ceramic fiber sealing ropes are arranged on the inner side supporting plate, the specification accords with the gap between the two side plates and absorbs the oversized transverse displacement Y320mm and Z110mm generated by the settlement of the hearth, the ceramic fiber sealing ropes are tightly fixed on the supporting plate by using a stainless steel pressing plate, the generated transverse displacement is absorbed by the plane movement of the sealing ropes, the temperature of the inner cavity of the expansion joint is prevented from directly passing to the outside, particles in the inner cavity are prevented from entering the heat insulation layer of the expansion joint, the service life of the skin is prolonged, and the ceramic fiber sealing ropes are the key of the expansion joint.

3.5. At the connecting position of the two side plates with the hearth and the ash channel, because the compensation amount is large, the extension height size is large, the rib plates are additionally arranged between the two side plates and the hearth and the ash channel, and the strength of the two side plates in the heat insulation layer is increased.

3.6. The thermal-insulating layer comprises three, confirms the specific size of every insulating layer according to two curb plates and frame height, and all closely laminate between the insulating layer and the frame, play good thermal-insulated effect.

3.7. Because the expansion joint absorbs the transverse displacement and is larger, the left frame and the right frame are designed to be predeformed, the side frame of the hearth is 160mm higher than the frame of the ash channel side, the expansion joint reaches the maximum height after the skin is installed, and the side frame of the ash channel is 160mm higher than the hearth side under the working condition.

3.8. Compared with the traditional domestic CFB furnace expansion joint, the structure of the expansion joint in the technical scheme has larger absorption displacement, is also a new structure and concept of separately absorbing axial displacement and transverse displacement, has better temperature resistance, increases the deformation resistance of metal materials, also improves the wear-resistant and scouring-resistant performance, correspondingly improves the dust-proof performance, and greatly prolongs the service life of the fabric skin under the improvement of the temperature resistance and the dust-proof performance.

The technology is already on an eastern electric 50MW gas turbine test platform; 2X 6F units in the Yangtze river of Datang; the 2X 9H gas turbine waste heat boiler of the Hua-Dycheng power plant is applied, and has good effect of preventing high-temperature flue gas from leaking, and at present, no alternative scheme exists.

The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. The technical personnel of this trade also know, the utility model discloses do not receive the restriction of above-mentioned embodiment case, the description is only illustrated in above-mentioned embodiment case and the description the principle of the utility model, do not keeping away from the utility model discloses under the design category prerequisite, the utility model discloses still can have various changes and improvement, these changes and improvement all fall into the protection of claim the within range of the utility model. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (3)

1. Nonmetal expansion joint, its characterized in that: the left frame (1) is sleeved with the outlet connecting pipe (20), the right frame (5) is sleeved with the inlet connecting pipe (19), a left side plate (6) is arranged on the right end face of the outlet connecting pipe (20) and fixed through a plurality of Y-shaped steel nails (13), and a first heat insulation layer (2) is arranged between the left side plate (6) and the left frame (1);

a right side plate (8) is arranged on the left end face of the inlet connecting pipe (19) and is fixed by a plurality of Y-shaped steel nails (13), an ash prevention layer (11) is arranged between the right side plate (8) and the left side plate (6), a sealing rope (14) is sleeved outside the circumference of the ash prevention layer (11), an anchor ear (7) is arranged outside the circumference of the sealing rope (14), a support plate (9) is arranged between the sealing rope (14) and the ash prevention layer (11), a guide plate (10) is arranged on the inner ring of the right side plate (8) and is fixed with the ash prevention layer (11) by a V-shaped steel nail (12), and a wear-resistant layer (18) is arranged on the inner circumference of the guide plate (10);

fill insulating layer three (4) between right side frame (5) and left side board (6), insulating layer two (3) are filled to left side frame (1) and right frame (5), insulating layer two (3) peripheral hardware covering (15) parcel, fixed with bolt fastener (17) after establishing layering (16) on and on the outer circumference of left side frame (1) and right frame (5) respectively with the cover at covering skin (15) both ends.

2. The non-metallic expansion joint of claim 1, wherein: the arches of the skins (15) face outward when the skins are installed.

3. The non-metallic expansion joint of claim 1, wherein: the included angle between the central line of a medium circulation pipeline formed by the outlet connecting pipe (20) and the inlet connecting pipe (19) which are connected by the nonmetal expansion joint and the horizontal can be adjusted by applying external force.

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