Ash deposition prevention nonmetal expansion joint device

Abstract

The utility model relates to an anti-dust-deposition nonmetal expansion joint device which comprises an expansion joint body, a heat preservation pillow and a filling structure, the expansion joint body comprises a frame, a skin and a flow guide plate, the frame, the skin, the flow guide plate and the heat preservation pillow form an integral sealing structure, and the filling structure is arranged in the sealing structure. Through the structure, the problem that the compensation amount of the expansion joint in the thermal state is influenced due to the fact that ash in smoke is accumulated at the bottom of the skin of the expansion joint because the flow guide plates of the nonmetal expansion joint on the existing smoke and air duct are of a two-stacked non-sealed structure with one fixed end and one free end and are easy to deform in the thermal state is solved.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas duct systems for thermal power boilers, and specifically to a non-metallic expansion joint device for preventing ash accumulation. Background Technology

[0002] An expansion joint is a flexible structure installed on the shell of a container or pipeline to compensate for additional stress caused by temperature differences and mechanical vibration. It is also commonly called a compensator or expansion joint. It consists of a bellows (an elastic element) as its main working body, and accessories such as end pipes, supports, flanges, and guide pipes. The expansion joint utilizes the effective expansion and contraction deformation of its main working body, the bellows, to absorb dimensional changes in pipelines, guide pipes, and containers caused by thermal expansion and contraction, or to compensate for axial, lateral, and angular displacements. It can also be used for noise reduction and vibration damping. In heating systems, to prevent pipeline deformation or damage due to thermal expansion or temperature stress during heating, compensators are installed on the pipeline to compensate for thermal expansion, thereby reducing stress on the pipe wall and the forces acting on valves or support structures.

[0003] Expansion joints, as elastic compensating elements capable of free expansion and contraction, possess advantages such as reliable operation, good performance, and compact structure, and are widely used in chemical, metallurgical, and nuclear energy sectors. Expansion joints used in containers come in various forms; in terms of corrugation shape, the U-shaped expansion joint is the most widely used, followed by Ω-shaped and C-shaped joints. Expansion joints used in pipelines, in terms of structural compensation, are further classified into universal type, pressure-balanced type, hinged type, and universal joint type, among others.

[0004] Non-metallic expansion joints, commonly used compensators in flue gas ducts, consist of a frame, guide vanes, skin, and pressure plates, and compensate for the thermal expansion of the flue gas duct during operation. The guide vanes are two stacked pieces, each with one end fixed and the other free, and are not sealed. Under heat, the guide vanes are prone to deformation, causing ash in the flue gas to accumulate at the bottom of the expansion joint skin, thus affecting the compensation amount under heat. Utility Model Content

[0005] This utility model provides a non-metallic expansion joint device to prevent ash accumulation, which solves the problem that the guide plate of the existing non-metallic expansion joint on the flue is a two-piece stacked structure with one end fixed and the other end free and not sealed. Under hot conditions, the guide plate is easy to deform, which causes ash in the flue gas to accumulate at the bottom of the expansion joint skin, thus affecting the compensation amount of the expansion joint under hot conditions.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] A non-metallic expansion joint device for preventing dust accumulation includes an expansion joint body, an insulation pillow, and a filling structure. The expansion joint body includes a frame, a skin, and a guide plate. The guide plate and the insulation pillow are connected as one unit. The frame, skin, guide plate, and insulation pillow form an integral sealed structure. The filling structure is disposed within this sealed structure.

[0008] The beneficial effects of this utility model are that the frame, skin, baffle, and insulation pillow form an integral sealed structure, and the baffle and insulation pillow are connected as one piece, which can effectively prevent the accumulation of ash in the flue gas. Filling the filling structure inside this sealed structure can effectively prevent the metal baffle from deforming.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the frame is divided into two parts, which are symmetrically arranged in an I-shape, with the I-shapes of the two parts arranged in opposite directions.

[0011] The beneficial effect of adopting the above-mentioned further solution is that the I-shaped shapes of the two frames are arranged in opposite symmetrical ways, which allows the protruding parts of the I-shaped parts of the two frames to be connected to the skin and the deflector respectively, so that the frame, skin, deflector and insulation pillow can form an integral sealed structure.

[0012] Furthermore, the two ends of the top of the frame are fixedly welded to the flue wall.

[0013] The beneficial effect of adopting the above-mentioned further solution is that the top of the frame is fixedly welded to the flue wall, so that the expansion joint body can be stably installed on the flue and compensate for the thermal expansion generated by the flue during operation.

[0014] Furthermore, the bottom of the frame is provided with a skin, which is an arc-shaped structure. The middle part of the skin is convex, and both ends are protruding. The two protruding ends are respectively connected to the two ends of the bottom of the two parts of the frame through the first connector and the pressure plate.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the skin is an arc-shaped structure, and the two protruding ends of the skin are respectively connected to the two parts of the frame to form a cavity for thermal expansion compensation, making the overall structure less prone to deformation.

[0016] Furthermore, there are two guide plates. The first ends of the two guide plates are respectively connected to the two ends of the heat insulation pillow through the second connector. The other end of one guide plate is connected to one end of the top of a frame, and the other end of the other guide plate is separated from one end of the top of another frame.

[0017] The beneficial effect of adopting the above-mentioned further solution is that the two guide plates are respectively connected to both ends of the insulation pillow through the second connector, so that the two guide plates and the insulation pillow are connected as a whole, which can effectively prevent the accumulation of ash in the flue gas.

[0018] Furthermore, the end of the guide plate connected to the top of the frame is the welded fixed end, and this end is the flue gas outlet end, while the end of the guide plate separated from the top of the frame is the flue gas inlet end.

[0019] The beneficial effect of adopting the above-mentioned further solution is that one of the guide plates is fixedly welded to one end of the top of the frame as the flue gas outlet end, and the free end of the other guide plate is the flue gas inlet end. The two guide plates are respectively connected to the two ends of the insulation pillow through the second connector, so that the two guide plates, the insulation pillow and the frame are connected as a whole, which can effectively prevent the accumulation of ash layer in the flue gas.

[0020] Furthermore, the heat-insulating pillow has an arc-shaped structure, with an inwardly convex middle section and protruding ends. The two protruding ends are respectively connected to two guide plates via a second connector.

[0021] The beneficial effects of adopting the above-mentioned further solution are that two guide plates are connected to the two ends of the heat insulation pillow, which have the function of blocking the flue gas, so that the ash in the flue gas cannot enter the expansion joint body. In addition, the heat insulation pillow adopts an arc-shaped structure for thermal expansion compensation, and the overall structure is not easily deformed.

[0022] Furthermore, the thermal pillow is made of rigid material.

[0023] The beneficial effect of adopting the above-mentioned further solution is that the material of the thermal pillow is a rigid material, which makes the thermal pillow suitable for thermal expansion compensation and the overall structure is not easily deformed.

[0024] Furthermore, the filling structure includes an aluminum silicate refractory blanket and an aluminum silicate filler, which are arranged sequentially and filled within a sealed structure formed by the frame, skin, baffle plate, and insulation pillow.

[0025] The beneficial effect of adopting the above-mentioned further solution is that by filling the space between the frame, skin, baffle, and insulation pillow to form a sealed structure, the amount of soot entering can be effectively reduced.

[0026] Furthermore, aluminum silicate filler is filled in the structure between the skin and the frame, and aluminum silicate fire-resistant blanket is filled in the structure between the aluminum silicate filler, the baffle plate, and the heat-insulating pillow.

[0027] The beneficial effect of adopting the above-mentioned further solution is that by filling the structure between the skin and the frame with aluminum silicate filler, and filling the space between the aluminum silicate filler, the baffle plate, and the insulation pillow with an aluminum silicate refractory blanket, the effective filtration of smoke ash by the aluminum silicate refractory blanket makes it easier to prevent smoke ash from entering the expansion joint body. Filling the structure between the skin and the frame with aluminum silicate filler can effectively prevent smoke ash from accumulating on the skin, and even if smoke ash enters, it will only be a small amount. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a non-metallic expansion joint device for preventing dust accumulation according to this utility model.

[0029] The components represented by each number in the attached diagram are listed below: 1. Insulation pillow; 2. Filling structure; 21. Aluminum silicate refractory blanket; 22. Aluminum silicate filler; 3. Frame; 4. Skin; 41. First connector; 42. Pressure plate; 5. Deflector plate; 51. Second connector. Detailed Implementation

[0030] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0031] Example 1

[0032] like Figure 1 As shown, a non-metallic expansion joint device for preventing dust accumulation includes an expansion joint body, an insulation pillow 1, and a filling structure 2. The expansion joint body includes a frame 3, a skin 4, and a guide plate 5. The guide plate 5 and the insulation pillow 1 are connected as one unit. The frame 3, the skin 4, the guide plate 5, and the insulation pillow 1 form an integral sealed structure. The filling structure 2 is disposed within this sealed structure.

[0033] Specifically, the baffle plate 5 is connected to the heat insulation pillow 1 as a whole, and the frame 3, the skin 4, the baffle plate 5 and the heat insulation pillow 1 form an integral sealed structure. The filling structure 2 is then filled into this sealed structure, which can effectively prevent the accumulation of ash in the flue gas and effectively prevent the metal baffle plate 5 from deforming.

[0034] like Figure 1 As shown, frame 3 is divided into two parts. The two parts of frame 3 are symmetrically arranged in an I-shape, and the I-shapes of the two parts of frame 3 are arranged in opposite directions.

[0035] Specifically, the two I-shaped parts of the frame 3 are arranged in opposite symmetrical configurations, which allows the protruding parts of the two I-shaped parts of the frame 3 to be connected to the skin 4 and the baffle 5 respectively, so that the frame 3, the skin 4, the baffle 5 and the heat insulation pillow 1 can form an integral sealed structure.

[0036] like Figure 1As shown, the two ends of the top of frame 3 are fixedly welded to the flue wall.

[0037] Specifically, the top of frame 3 is fixedly welded to the flue wall, so that the expansion joint body can be stably installed on the flue and compensate for the thermal expansion generated by the flue during operation.

[0038] like Figure 1 As shown, the bottom of the frame 3 is provided with a skin 4. The skin 4 has an arc-shaped structure. The middle part of the skin 4 is convex and the two ends are protruding. The two protruding ends are respectively connected to the two ends of the bottom of the two parts of the frame 3 through the first connector 41 and the pressure plate 42.

[0039] Specifically, the two protruding ends of the skin 4 are connected to the two parts of the frame 3 to form a cavity. The skin 4 has an arc-shaped structure that is convex outward, which is used for thermal expansion compensation, making the overall structure less prone to deformation.

[0040] like Figure 1 As shown, there are two guide plates 5. The first ends of the two guide plates 5 are respectively connected to the two ends of the heat-insulating pillow 1 through the second connector 51. The other end of one guide plate 5 is connected to one end of the top of a frame 3, and the other end of the other guide plate 5 is separated from one end of the top of another frame 3.

[0041] Specifically, the two guide plates 5 are connected to both ends of the heat insulation pillow 1 through the second connector 51, connecting the two guide plates 5 and the heat insulation pillow 1 into a whole, which can effectively prevent the accumulation of ash in the flue gas.

[0042] like Figure 1 As shown, the end of the guide plate 5 connected to the top of the frame 3 is the welded fixed end, and this end is the flue gas outlet end. The end of the guide plate 5 separated from the top of the frame 3 is the flue gas inlet end.

[0043] Specifically, one of the guide plates 5 is fixedly welded to one end of the top of the frame 3 as the flue gas outlet end, and the free end of the other guide plate 5 is the flue gas inlet end. The two guide plates 5 are respectively connected to the two ends of the insulation pillow 1 through the second connector 51, connecting the two guide plates 5, the insulation pillow 1, and the frame 3 into a whole. The medium flows from the flue gas inlet end to the flue gas outlet end, blocking the soot from entering the expansion joint body and effectively preventing the accumulation of ash layer in the flue gas.

[0044] like Figure 1 As shown, the heat-insulating pillow 1 has an arc-shaped structure. The middle part of the heat-insulating pillow 1 is convex, and both ends are protruding. The two protruding ends are respectively connected to the two guide plates 5 through the second connector 51.

[0045] Specifically, the heat insulation pillow 1 has an inwardly convex arc-shaped structure. The inwardly convex arc of the heat insulation pillow 1 is located inside the frame 3. Two guide plates 5 are connected to the two ends of the heat insulation pillow 1, which have the function of blocking the flue gas, so that the ash in the flue gas cannot enter the expansion joint body. In addition, the heat insulation pillow 1 adopts an arc-shaped structure for thermal expansion compensation, and the overall structure is not easily deformed.

[0046] like Figure 1 As shown, the thermal pillow 1 is made of a rigid material.

[0047] Specifically, the thermal pillow 1 is made of a rigid material, which allows it to compensate for thermal expansion and prevents the overall structure from deforming. In this embodiment, the thermal pillow 1 is made of Q235B steel. Alternatively, other rigid materials can be used, such as copper or iron.

[0048] like Figure 1 As shown, the filling structure 2 includes an aluminum silicate refractory blanket 21 and an aluminum silicate filler 22. The aluminum silicate refractory blanket 21 and the aluminum silicate filler 22 are arranged in sequence and are filled in the sealed structure formed by the frame 3, the skin 4, the guide plate 5 and the heat insulation pillow 1.

[0049] Specifically, the aluminum silicate fire-resistant blanket 21 and aluminum silicate filler 22 are sequentially filled into the space between the frame 3, the skin 4, the baffle plate 5, and the insulation pillow 1 to form a sealed structure. Alternatively, the filling structure 2 can be other fire-resistant filling materials, such as flame-retardant cotton.

[0050] like Figure 1 As shown, aluminum silicate filler 22 is filled in the structure between skin 4 and frame 3, and aluminum silicate fire blanket 21 is filled in the structure between aluminum silicate filler 22, baffle plate 5 and heat insulation pillow 1.

[0051] Specifically, aluminum silicate filler 22 is filled into the structure between the skin 4 and the frame 3, and aluminum silicate refractory blanket 21 is filled between the aluminum silicate filler 22, the baffle plate 5, and the insulation pillow 1. The aluminum silicate refractory blanket 21 effectively filters the smoke ash, making it easier to prevent smoke ash from entering the expansion joint body. Filling the structure between the skin 4 and the frame 3 with aluminum silicate filler 22 can effectively prevent smoke ash from accumulating under the skin 4, and even if smoke ash enters, it will only be a small amount.

[0052] The beneficial effects of this embodiment are as follows: the frame 3, skin 4, baffle 5, and insulation pillow 1 form an integral sealed structure. The baffle 5 and insulation pillow 1 are connected as a whole, which can effectively prevent the accumulation of ash in the flue gas. The skin 4 and insulation pillow 1 are designed as arc-shaped structures for thermal expansion compensation, making the overall structure less prone to deformation. At the same time, the filling structure 2 is filled into this sealed structure, which makes it easier to prevent soot from entering the expansion joint body, effectively preventing soot from accumulating under the skin 4 and effectively preventing the deformation of the metal baffle 5.

[0053] The working process of this embodiment is as follows: Two guide plates 5 are connected to both ends of the insulation pillow 1 via the second connector 51, and the end of one guide plate 5 away from the insulation pillow 1 is fixedly welded to one end of the top of the frame 3, which is the flue gas outlet end. The end of the other guide plate 5 away from the insulation pillow 1 is separate from the top of the frame 3, which is the flue gas inlet end. When the flue gas enters the expansion joint body along the flue gas inlet end, it is filtered by the double-layer barrier of the aluminum silicate refractory blanket 21 and the aluminum silicate filler 22, so that only a small amount of flue gas enters the expansion joint body, thereby reducing the accumulation of flue gas in the expansion joint body.

[0054] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0057] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A non-metallic expansion joint device for preventing dust accumulation, comprising an expansion joint body, characterized in that, It also includes a thermal pillow (1) and a filling structure (2), The expansion joint body includes a frame (3), a skin (4), and a guide plate (5). The guide plate (5) is connected to the heat-insulating pillow (1) as a whole. The frame (3), the skin (4), the guide plate (5), and the heat-insulating pillow (1) form an integral sealed structure. The filling structure (2) is disposed within this sealed structure.

2. The anti-dust accumulation non-metallic expansion joint device according to claim 1, characterized in that, The frame (3) is divided into two parts, and the two parts of the frame (3) are symmetrically arranged in an I-shape, with the I-shapes of the two parts of the frame (3) arranged in opposite directions.

3. The anti-dust accumulation non-metallic expansion joint device according to claim 2, characterized in that, The two ends of the top of the frame (3) are respectively fixedly welded to the flue wall.

4. The anti-dust accumulation non-metallic expansion joint device according to claim 2, characterized in that, The bottom of the frame (3) is provided with the skin (4), which is an arc-shaped structure. The middle part of the skin (4) is convex and the two ends are protruding. The two protruding ends are respectively connected to the bottom of the two parts of the frame (3) through the first connector (41) and the pressure plate (42).

5. The anti-dust accumulation non-metallic expansion joint device according to claim 1, characterized in that, The guide plate (5) has two pieces. The first ends of the two guide plates (5) are respectively connected to the two ends of the heat-insulating pillow (1) through the second connector (51). The other end of one guide plate (5) is connected to one end of the top of a frame (3), and the other end of the other guide plate (5) is separated from one end of the top of another frame (3).

6. The anti-dust accumulation non-metallic expansion joint device according to claim 5, characterized in that, The end of the guide plate (5) connected to the top of the frame (3) is a welded fixed end, and this end is the flue gas outlet end. The end of the guide plate (5) separated from the top of the frame (3) is the flue gas inlet end.

7. The anti-dust accumulation non-metallic expansion joint device according to claim 5, characterized in that, The heat-insulating pillow (1) has an arc-shaped structure. The middle part of the heat-insulating pillow (1) is convex, and both ends are protruding. The two protruding ends are respectively connected to the two guide plates (5) through the second connector (51).

8. The anti-dust accumulation non-metallic expansion joint device according to claim 7, characterized in that, The thermal pillow (1) is made of rigid material.

9. The anti-dust accumulation non-metallic expansion joint device according to claim 1, characterized in that, The filling structure (2) includes an aluminum silicate refractory blanket (21) and an aluminum silicate filler (22). The aluminum silicate refractory blanket (21) and the aluminum silicate filler (22) are arranged in sequence and are filled in the sealed structure formed by the frame (3), the skin (4), the guide plate (5) and the heat-insulating pillow (1).

10. A non-metallic expansion joint device for preventing dust accumulation according to claim 9, characterized in that, The aluminum silicate filler (22) is filled in the structure between the skin (4) and the frame (3), and the aluminum silicate fire blanket (21) is filled between the aluminum silicate filler (22), the guide plate (5), and the heat-insulating pillow (1).

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