Sealing structure of water-cooled wall cover of peak-shaving boiler

Abstract

This invention discloses a sealing structure for a water-cooled wall casing of a peak-shaving boiler, relating to the field of boiler water-cooled wall engineering technology. Its main purpose is to achieve both sealing and heat insulation of the casing openings while ensuring the three-dimensional free expansion of the rigid lead-out rod. The main technical solution of this invention is as follows: The sealing structure includes a casing with a first through hole; a rigid lead-out rod extending from the casing through the first through hole, with an expansion gap between the hole wall and the rigid lead-out rod to provide movement space for the rigid lead-out rod; and a first sealing element disposed inside the casing, including a first heat insulation layer with a second through hole. The first heat insulation layer is laid on the inner wall of the casing and covers the expansion gap. The first and second through holes correspond to each other, and the rigid lead-out rod passes through the second through hole, with the hole wall of the second through hole contacting the rigid lead-out rod. The first heat insulation layer is pleated.

Description

Technical Field

[0001] This invention relates to the field of boiler water-cooled wall engineering technology, and more specifically, to a sealing structure for a peak-shaving boiler water-cooled wall casing. Background Technology

[0002] Currently, the power industry frequently adjusts peak loads, and load fluctuations cause frequent expansion and changes in the high-temperature headers of boilers, which can easily lead to fatigue cracking at the corner welds of the header connection seats, and in severe cases, cause unscheduled unit shutdowns.

[0003] With the advancement of power digitalization, the industry typically uses online monitoring to monitor the expansion changes of headers. However, because the headers are located in a high-temperature environment within the casing, direct measurement of the expansion is usually impossible. Therefore, it is often necessary to weld rigid extension rods to the ends of the headers, extending them outside the casing. The expansion changes are then indirectly reflected by measuring the expansion at the ends of these rigid extension rods. This necessitates openings in the casing to allow the rigid extension rods to extend. Therefore, sealing the gap between the casing opening and the rigid extension rod becomes a critical issue. Related technologies typically seal the gap by filling it with insulation material. However, this sealing method not only has poor thermal insulation performance but also easily affects the three-dimensional free expansion of the rigid extension rods. Summary of the Invention

[0004] In view of this, the present invention provides a sealing structure for the water-cooled wall cover of a peak-shaving boiler, the main purpose of which is to achieve sealing and heat insulation of the openings in the cover, while also ensuring the three-dimensional free expansion of the rigid lead-out rods.

[0005] To achieve the above objectives, the present invention mainly provides the following technical solutions:

[0006] This invention provides a sealing structure for a water-cooled wall casing of a peak-shaving boiler, comprising:

[0007] The cover has a first through hole;

[0008] A rigid lead-out rod extends out of the cover through the first through hole, and there is an expansion gap between the hole wall of the first through hole and the rigid lead-out rod, the expansion gap being used to provide movement space for the rigid lead-out rod;

[0009] A first sealing element is disposed inside the housing. The first sealing element includes a first heat insulation layer. The first heat insulation layer has a second through hole. The first heat insulation layer is laid on the inner wall of the housing and covers the expansion gap. The first through hole and the second through hole correspond to each other. The rigid lead-out rod passes through the second through hole. The hole wall of the second through hole contacts the rigid lead-out rod. The first heat insulation layer is pleated.

[0010] Furthermore, the rigid lead-out rod is a channel steel;

[0011] The sealing structure of the peak-shaving boiler water-cooled wall cover also includes a heat insulation component, which is filled inside the channel steel and contacts the wall of the second through hole.

[0012] Furthermore, the first sealing element also includes a positioning element connected to the first heat insulation layer, which is used to keep the wall of the second through hole in contact with the rigid lead-out rod.

[0013] Furthermore, the positioning element includes a positioning frame and a plurality of first fasteners. The shape of the positioning frame matches the shape of the second through hole. The positioning frame is sleeved on the outside of the rigid lead-out rod. The positioning frame is connected to the first heat insulation layer through the plurality of first fasteners and is located at the edge of the second through hole.

[0014] Furthermore, the first sealing element also includes a first fixing element, which is disposed on the outer periphery of the first through hole, and the first heat insulation layer is connected to the inner wall of the cover through the first fixing element.

[0015] Furthermore, the first fastener includes a fixing frame and a plurality of second fasteners. The fixing frame surrounds the outside of the first through hole and is connected to the inner wall of the cover by the plurality of second fasteners.

[0016] Furthermore, the sealing structure of the peak-shaving boiler water-cooled wall cover also includes:

[0017] A second sealing element is disposed on the outside of the housing. The second sealing element includes a second heat insulation layer, which is laid on the outer wall of the housing and covers the expansion gap. A third through hole corresponding to the first through hole is formed on the second heat insulation layer. The rigid lead-out rod passes through the third through hole, and the hole wall of the third through hole contacts the rigid lead-out rod. The top of the second heat insulation layer is connected to the outer wall of the housing, and the sides and bottom of the second heat insulation layer are in a free state.

[0018] The second heat insulation layer has a notch that extends through to the third through hole.

[0019] Furthermore, the notch is located at the bottom of the second insulation layer; the notch extends in a straight line and is perpendicular to the rigid lead-out rod.

[0020] Furthermore, the rigid lead-out rod is a channel steel;

[0021] The sealing structure of the peak-shaving boiler water-cooled wall cover also includes a heat insulation component, which is filled inside the channel steel and contacts the wall of the third through hole.

[0022] Furthermore, the second seal also includes a second fastener, and the top of the second heat insulation layer is connected to the outer wall of the housing via the second fastener;

[0023] The second fastener includes a fixing plate and a plurality of third fasteners. The fixing plate extends horizontally at the top of the first through hole and is connected to the outer wall of the housing by the plurality of third fasteners.

[0024] By employing the above technical solution, the present invention has at least the following beneficial effects:

[0025] In the sealing structure of the peak-shaving boiler water-cooled wall cover provided in this embodiment of the invention, the first sealing element includes a first heat insulation layer. The first heat insulation layer is laid on the inner wall of the cover and covers the expansion gap between the rigid lead-out rod and the wall of the first through hole on the cover. Simultaneously, the rigid lead-out rod contacts the wall of the second through hole on the first heat insulation layer, so that the first heat insulation layer effectively seals and insulates the first through hole. Moreover, the first heat insulation layer is pleated. When the rigid lead-out rod expands with the expansion of the header and moves within the expansion gap, the pleats of the first heat insulation layer can be stretched out with the movement of the rigid lead-out rod, thereby ensuring the three-dimensional free expansion of the rigid lead-out rod. In other words, the sealing structure provided in this embodiment of the invention not only provides good heat insulation but also ensures the three-dimensional free expansion of the rigid lead-out rod, which is of great significance for the safety of equipment operation and the environment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the first sealing element in a sealing structure for a water-cooled wall cover of a peak-shaving boiler, provided in an embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the second sealing element in a peak-shaving boiler water-cooled wall cover sealing structure provided in an embodiment of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be described in more detail below with reference to the accompanying drawings of the preferred embodiments. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0029] In the description of this embodiment, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "level", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this embodiment.

[0030] like Figure 1 As shown, this embodiment of the invention provides a sealing structure for a water-cooled wall casing of a peak-shaving boiler, including a casing with a first through hole 1; a rigid lead-out rod 2 extending out of the casing through the first through hole 1, with an expansion gap between the wall of the first through hole 1 and the rigid lead-out rod 2, which provides movement space for the rigid lead-out rod 2; and a first sealing member 3 disposed inside the casing, including a first heat insulation layer 31 with a second through hole. The first heat insulation layer 31 is laid on the inner wall of the casing and covers the expansion gap. The first through hole 1 and the second through hole correspond to each other, and the rigid lead-out rod 2 passes through the second through hole, with the wall of the second through hole in contact with the rigid lead-out rod 2. The first heat insulation layer 31 is pleated. The first heat insulation layer 31 can be made of a heat-insulating material that is both high-temperature resistant and flexible, such as aluminum silicate fiber, glass fiber fireproof cloth, or ceramic fiber composite blanket.

[0031] It is understandable that the size of the first through hole 1 can be determined based on the three-dimensional thermal expansion of the rigid lead-out rod 2; correspondingly, the first heat insulation layer 31 is pleated, that is, the parts of the first heat insulation layer 31 located in the up, down, left and right directions of the rigid lead-out rod 2 are all pleated, not taut. Moreover, the size of the pleats can be determined based on the three-dimensional thermal expansion of the rigid lead-out rod 2, thereby ensuring the three-dimensional free expansion of the rigid lead-out rod 2.

[0032] In the sealing structure of the peak-shaving boiler water-cooled wall cover provided in this embodiment of the invention, the first sealing element 3 includes a first heat insulation layer 31. The first heat insulation layer 31 is laid on the inner wall of the cover and covers the expansion gap between the rigid lead-out rod 2 and the wall of the first through hole 1 on the cover. At the same time, the rigid lead-out rod 2 is in contact with the wall of the second through hole on the first heat insulation layer 31, so that the first heat insulation layer 31 plays a good role in sealing and heat insulation for the first through hole 1. Moreover, the first heat insulation layer 31 is pleated. When the rigid lead-out rod 2 is displaced in the expansion gap as the header expands, the pleats of the first heat insulation layer 31 can be stretched out with the movement of the rigid lead-out rod 2, thereby ensuring the three-dimensional free expansion of the rigid lead-out rod 2. In other words, the sealing structure provided in this embodiment of the invention not only plays a good role in heat insulation, but also ensures the three-dimensional free expansion of the rigid lead-out rod 2, which is of great significance for the safety of equipment operation and the environment.

[0033] In some embodiments, see Figure 1 The rigid lead-out rod 2 can be a channel steel; the sealing structure of the water-cooled wall cover of the peak-shaving boiler also includes a heat insulation component 4, which is filled inside the channel steel and contacts the wall of the second through hole.

[0034] Specifically, the inner groove of the channel steel is filled and sealed with insulation component 4, and the portion of insulation component 4 located at the open end of the channel steel is in contact with the wall of the second through hole, thereby ensuring a seamless connection between the sealing structure and the channel steel, and thus guaranteeing the heat insulation effect of the sealing structure against the high temperature inside the casing. Specifically, insulation component 4 can be insulation cotton.

[0035] In some embodiments, see Figure 1 The first sealing element 3 may also include a positioning element 32, which is connected to the first heat insulation layer 31 and is used to keep the wall of the second through hole in contact with the rigid lead-out rod 2.

[0036] By setting the positioning element 32, when the rigid lead-out rod 2 expands in three dimensions, the positioning element 32 can ensure that the hole wall of the second through hole always remains in contact with the rigid lead-out rod 2, thereby ensuring the sealing reliability of the sealing structure.

[0037] The positioning element 32 can have various structural forms, as long as it can ensure that the wall of the second through hole always remains in contact with the rigid lead-out rod 2.

[0038] For ease of use, see [link to relevant documentation] in some embodiments. Figure 1 The positioning element 32 may include a positioning frame 321 and a plurality of first fasteners 322. The shape of the positioning frame 321 matches the shape of the second through hole. The positioning frame 321 is sleeved on the outside of the rigid lead-out rod 2. The positioning frame 321 is connected to the first heat insulation layer 31 through the plurality of first fasteners 322 and is located at the edge of the second through hole.

[0039] The positioning frame 321 is fitted onto the outside of the rigid lead-out rod 2 and located at the edge of the second through hole. Thus, the edge of the second through hole in the first insulation layer 31 is positioned by the positioning frame 321 against the outer wall of the rigid lead-out rod 2 and can move with the rigid lead-out rod 2. This ensures that the wall of the second through hole remains in contact with the rigid lead-out rod 2, guaranteeing a seamless connection between the rigid lead-out rod 2 and the first insulation layer 31, thereby improving the sealing and heat insulation effect of the first insulation layer 31. The structure is simple and reliable. Specifically, the positioning frame 321 can be made of steel plate, and the first fastener 322 can be a dovetail nail.

[0040] In some embodiments, see Figure 1 The first sealing element 3 may also include a first fixing element 33, which is disposed on the outer periphery of the first through hole 1. The first heat insulation layer 31 is connected to the inner wall of the cover through the first fixing element 33, so that the first heat insulation layer 31 is stably laid on the inner wall of the cover.

[0041] The first fastener 33 can have various structural forms, as long as it can stably fix the first heat insulation layer 31 to the inner wall of the casing.

[0042] In some embodiments, see Figure 1 The first fastener 33 may include a fixing frame 331 and a plurality of second fasteners 332. The fixing frame 331 surrounds the outside of the first through hole 1 and the fixing frame 331 is connected to the inner wall of the cover by the plurality of second fasteners 332, so that the first heat insulation layer 31 stably seals the first through hole 1 along the circumference of the first through hole 1 inside the cover.

[0043] It should be noted that the first heat insulation layer 31 can have a large margin in the circumferential direction of the first through hole 1, thereby ensuring that the fixing frame 331 has sufficient installation space to fix the first heat insulation layer 31. Specifically, the fixing frame 331 can be a wide steel sheet, and the second fastener 332 can be a dovetail nail.

[0044] In some embodiments, see Figure 2The sealing structure of the peak-shaving boiler water-cooled wall cover may also include a second sealing element 5, which is disposed on the outside of the cover. The second sealing element 5 includes a second heat insulation layer 51, which is laid on the outer wall of the cover and covers the expansion gap. A third through hole corresponding to the first through hole 1 is opened on the second heat insulation layer 51. The rigid lead-out rod 2 passes through the third through hole, and the hole wall of the third through hole contacts the rigid lead-out rod 2. The top of the second heat insulation layer 51 is connected to the outer wall of the cover, and the sides and bottom of the second heat insulation layer 51 are in a free state. A notch 511 is opened on the second heat insulation layer 51, which extends to the third through hole.

[0045] The second sealing element 5 located outside the housing and the first sealing element 3 located inside the housing cooperate with each other, that is, the first heat insulation layer 31 and the second heat insulation layer 51 together seal the first through hole 1 inside and outside the housing, further improving the sealing effect of the sealing structure on the first through hole 1.

[0046] The second insulation layer 51 of the second sealing element 5 adopts a curtain-like structure, meaning that the top of the second insulation layer 51 is connected to the outer wall of the casing, while the sides and bottom are in a free state. This structure allows the second insulation layer 51 to seal the first through hole 1 outside the casing, while also ensuring the compactness and aesthetics of the equipment structure compared to a pleated insulation layer inside the casing. Furthermore, the curtain-like design of the second insulation layer 51 on the outside of the casing results in a smooth surface, making it less susceptible to damage from pulling, impacts, or other external forces. Moreover, the notch 511 extending to the third through hole in the second insulation layer 51 further facilitates the three-dimensional free expansion of the rigid lead-out rod 2. Specifically, the second insulation layer 51 can be made of a high-temperature resistant and flexible insulation material, such as aluminum silicate fiber, fiberglass fireproof cloth, or ceramic fiber composite blanket.

[0047] It is understandable that the structure of the second seal 5 can be the same as that of the first seal 3. That is to say, a pleated heat insulation layer can also be installed on the outside of the cover to cover the expansion gap, which can better improve the sealing effect of the sealing structure on the cover.

[0048] In some embodiments, see Figure 2 The notch 511 can be located at the bottom of the second insulation layer 51. The notch 511 extends in a straight line and is set perpendicular to the rigid lead-out rod 2, which makes it easier for the rigid lead-out rod 2 to move in the up, down, left and right directions, thus making it easier for the rigid lead-out rod 2 to expand freely in three dimensions.

[0049] In some embodiments, see Figure 2The rigid lead-out rod 2 can be a channel steel; the sealing structure of the peak-shaving boiler water-cooled wall cover also includes a heat insulation component 4, such as heat insulation cotton. The heat insulation component 4 is filled inside the channel steel and contacts the hole wall of the third through hole, thereby ensuring that there is no gap between the sealing structure and the channel steel, thus ensuring the heat insulation effect of the sealing structure on the high temperature inside the cover.

[0050] In some embodiments, see Figure 2 The second sealing member 5 also includes a second fixing member 52. The top of the second heat insulation layer 51 is connected to the outer wall of the cover through the second fixing member 52, so that the second heat insulation layer 51 is arranged in a curtain-like structure.

[0051] The second fastener 52 can have various structural forms, as long as it can stably fix the second heat insulation layer 51 to the outer wall of the casing.

[0052] In some embodiments, see Figure 2 The second fastener 52 may include a fixing plate 521 and a plurality of third fasteners 522. The fixing plate 521 extends horizontally at the top of the first through hole 1. The fixing plate 521 is connected to the outer wall of the cover by the plurality of third fasteners 522, thereby enabling the second heat insulation layer 51 to stably seal the first through hole 1 on the outside of the cover.

[0053] It should be noted that the second heat insulation layer 51 can have a large allowance in the circumferential direction of the first through hole 1, thereby ensuring that the fixing plate 521 has sufficient installation space to fix the second heat insulation layer 51, and at the same time, ensuring that the second heat insulation layer 51 covers the expansion space. Specifically, the fixing plate 521 can be a wide steel sheet, and the third fastener 522 can be a dovetail nail.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A sealing structure for a water-cooled wall cover of a peak-shaving boiler, characterized in that, include: The cover has a first through hole; A rigid lead-out rod extends out of the cover through the first through hole, and there is an expansion gap between the hole wall of the first through hole and the rigid lead-out rod, the expansion gap being used to provide movement space for the rigid lead-out rod; A first sealing element is disposed inside the housing. The first sealing element includes a first heat insulation layer. The first heat insulation layer has a second through hole. The first heat insulation layer is laid on the inner wall of the housing and covers the expansion gap. The first through hole and the second through hole correspond to each other. The rigid lead-out rod passes through the second through hole. The hole wall of the second through hole contacts the rigid lead-out rod. The first heat insulation layer is pleated. The aforementioned peak-shaving boiler water-cooled wall cover sealing structure also includes: A second sealing element is disposed on the outside of the housing. The second sealing element includes a second heat insulation layer, which is laid on the outer wall of the housing and covers the expansion gap. A third through hole corresponding to the first through hole is formed on the second heat insulation layer. The rigid lead-out rod passes through the third through hole, and the hole wall of the third through hole contacts the rigid lead-out rod. The top of the second heat insulation layer is connected to the outer wall of the housing, and the sides and bottom of the second heat insulation layer are in a free state. The second heat insulation layer has a notch that extends through to the third through hole.

2. The sealing structure of the water-cooled wall cover of the peak-shaving boiler according to claim 1, characterized in that, The rigid lead-out rod is a channel steel; The sealing structure of the peak-shaving boiler water-cooled wall cover also includes a heat insulation component, which is filled inside the channel steel and contacts the wall of the second through hole.

3. The sealing structure of the water-cooled wall cover of the peak-shaving boiler according to claim 1, characterized in that, The first sealing element further includes a positioning element, which is connected to the first heat insulation layer and is used to keep the wall of the second through hole in contact with the rigid lead-out rod.

4. The sealing structure of the water-cooled wall cover of the peak-shaving boiler according to claim 3, characterized in that, The positioning element includes a positioning frame and a plurality of first fasteners. The shape of the positioning frame matches the shape of the second through hole. The positioning frame is sleeved on the outside of the rigid lead-out rod. The positioning frame is connected to the first heat insulation layer through the plurality of first fasteners and is located at the edge of the second through hole.

5. The sealing structure of the water-cooled wall cover of the peak-shaving boiler according to claim 1, characterized in that, The first sealing element further includes a first fixing element, which is disposed on the outer periphery of the first through hole, and the first heat insulation layer is connected to the inner wall of the cover through the first fixing element.

6. The sealing structure of the water-cooled wall cover of the peak-shaving boiler according to claim 5, characterized in that, The first fastener includes a fixing frame and a plurality of second fasteners. The fixing frame surrounds the outside of the first through hole and is connected to the inner wall of the cover by the plurality of second fasteners.

7. The sealing structure of the water-cooled wall cover of the peak-shaving boiler according to claim 1, characterized in that, The notch is located at the bottom of the second insulation layer; the notch extends in a straight line and is perpendicular to the rigid lead-out rod.

8. The sealing structure of the water-cooled wall cover of the peak-shaving boiler according to claim 1, characterized in that, The rigid lead-out rod is a channel steel; The sealing structure of the peak-shaving boiler water-cooled wall cover also includes a heat insulation component, which is filled inside the channel steel and contacts the wall of the third through hole.

9. The sealing structure of the water-cooled wall cover of the peak-shaving boiler according to claim 1, characterized in that, The second sealing element also includes a second fixing element, and the top of the second heat insulation layer is connected to the outer wall of the housing through the second fixing element; The second fastener includes a fixing plate and a plurality of third fasteners. The fixing plate extends horizontally at the top of the first through hole and is connected to the outer wall of the housing by the plurality of third fasteners.

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