Boiler end socket shield adapting to thermal expansion of boiler

Abstract

The utility model discloses a boiler seal head shield adapted to thermal expansion of a boiler, which comprises a shield cylinder welded and fixed on a boiler wall guard plate, a seal plate continuously welded and fixed with the shield cylinder, and a boiler seal head, and one end of the seal plate is intermittently and fixedly welded with a fixing ring; a sliding ring is arranged on one side of the boiler end socket in a spot welding mode. The fixed ring is matched with the sliding ring; the boiler end socket is simple and reliable in structure and easy to manufacture, and stress generated during thermal expansion of the boiler end socket can be reasonably released through the ingenious design of the sliding ring and the fixed ring 3. Potential safety hazards such as shield deformation, cracking and even boiler end socket damage caused by thermal expansion stress concentration are avoided, safety and stability of boiler equipment in the operation process are greatly improved, the problem of gaps between the end socket shield and the boiler wall protection plate caused by thermal expansion of a boiler is effectively solved, heat dissipation loss of the gaps is avoided, and the service life of the boiler wall protection plate is prolonged. The overall attractiveness of the boiler is ensured; the device is simple in structure, convenient to operate and worthy of popularization.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler technical field, specifically speaking, especially, a kind of boiler head protective cover suitable for the thermal expansion of boiler. BACKGROUND

[0002] The greater the geometric size of the boiler, the greater the working pressure, the higher the medium temperature, the greater the thermal expansion of the boiler. The head of the boiler is generally arranged outside the two side furnace wall guard plates. The traditional head protective cover is generally fixed on the head. When the boiler is heated and expanded, the head at both ends of the cylinder will move outward. The head protective cover moves outward with the movement of the head, so that a large gap is generated between the head protective cover and the furnace wall guard plate, which exposes the boiler drum, causes large heat loss, and affects the overall appearance of the boiler. Therefore, we propose a boiler head protective cover suitable for the thermal expansion of boiler. SUMMARY

[0003] The utility model aims at providing a boiler head protective cover suitable for the thermal expansion of boiler to solve the problems raised in the above background.

[0004] To achieve the above object, the utility model provides the following technical scheme: a boiler head protective cover suitable for the thermal expansion of boiler, wherein, including the protective cover cylinder welded and fixed on the furnace wall guard plate, the sealing plate continuously welded and fixed with the protective cover cylinder, the boiler head, one end of the sealing plate is intermittently fixed and welded with a fixing ring; one side of the boiler head is spot welded with a sliding ring; the fixing ring is matched with the sliding ring.

[0005] Preferably, the inside of the protective cover cylinder is filled with an insulating thermal insulation layer.

[0006] Preferably, the sealing plate is a circular ring plate with a thickness of 4mm, and the sealing plate is provided with an inner circular hole, and the diameter of the inner circular hole is 522mm.

[0007] Preferably, the fixing ring is a φ534×3 circular ring rolled from 40×3 flat steel.

[0008] Preferably, the sliding ring is a φ526×3 circular ring rolled from 40×3 flat steel.

[0009] Preferably, the fixing ring and the sliding ring overlap by 10mm when cold assembled; a gap of 1mm is provided between the fixing ring and the sliding ring.

[0010] Beneficial effects: compared with the prior art, the beneficial effects of the utility model are: through the device setting, simple and reliable structure, easy to manufacture, through the ingenious design of the sliding ring and the fixed ring, the stress generated when the boiler head expands can be reasonably released. Avoid the security risks such as deformation, cracking of the shroud and even damage of the boiler head caused by the stress concentration of thermal expansion, greatly improve the safety and stability of the boiler equipment in the operation process, effectively solve the gap between the head shroud and the furnace wall guard plate caused by the thermal expansion of the boiler, avoid the heat loss of the gap part, and ensure the overall appearance of the boiler. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 The utility model proposes a whole structure schematic diagram of a boiler head shroud suitable for the thermal expansion of a boiler.

[0012] Figure 2 The utility model proposes a shroud cylinder structure schematic diagram of a boiler head shroud suitable for the thermal expansion of a boiler.

[0013] Figure 3 The utility model proposes an enlarged structure schematic diagram of A of a boiler head shroud suitable for the thermal expansion of a boiler.

[0014] In the drawing: 1-shroud cylinder, 2-sealing plate, 3-fixed ring, 4-sliding ring, 5-insulating heat preservation layer, 6-boiler head. DETAILED DESCRIPTION

[0015] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model is further explained below in combination with the drawings and examples.It should be explained that the examples and features in the examples of the present application can be combined with each other without conflict.

[0016] In the following description, a lot of specific details are set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways different from the description, therefore, the utility model is not limited to the specific examples disclosed in the following disclosure.

[0017] EXAMPLE

[0018] Please refer to the description of the drawings, the utility model discloses a kind of boiler head protection cover suitable for boiler thermal expansion, including welding fixed on furnace wall guard plate's protection cover cylinder body 1, with the continuous welding fixed plate 2 of protection cover cylinder body 1, boiler head 6, the fixed ring 3 of one end intermittent fixed welding is welded to fixed plate 2;The side of boiler head 6 is spot welded with sliding ring 4;The fixed ring 3 is adapted with sliding ring 4, the inside of protection cover cylinder body 1 is filled with insulation layer 5, fixed plate 2 uses the circular ring plate with 4mm thickness, and fixed plate 2 is provided with inner circular hole, and the diameter of inner circular hole is 522mm, the fixed ring 3 is by 40 × 3 flat steel and is rolled φ534 × 3 circular ring, the sliding ring 4 is by 40 × 3 flat steel and is rolled φ526 × 3 circular ring, the fixed ring 3 and sliding ring 4 overlap 10mm when cold state assembly;Gap is provided between the fixed ring 3 and sliding ring 4, and the gap is 1mm.

[0019] Use process:

[0020] When using, piece 1 protection cover cylinder body and furnace wall guard plate are welded, reach fixed, sealed requirement.Fixed plate 2 and protection cover cylinder body 1 are continuously welded fixed, fixed ring 3 and fixed plate 2 intermittent welding fixed, sliding ring 4 and boiler head 6 are spot welded fixed.Fixed ring 3 and sliding ring 4 when assembly want to ensure that there is 1mm gap, to ensure that the smooth sliding between two.When cold state assembly, piece 3 and piece 4 overlap 10mm.Boiler head 2 moves outward when boiler is expanded by heat, and sliding ring 4 moves outward, and piece protection cover cylinder body 1, fixed plate 2, fixed ring 3 are fixed, avoid the generation of gap between head protection cover and furnace wall guard plate.

[0021] When boiler is running, thermal expansion phenomenon can be generated.Boiler head 6 is expanded by heat, and sliding ring 4 spot welded on its side is moved.Sliding ring 4 is by 40 × 3 flat steel and is rolled φ526 × 3 circular ring, and it is adapted with the fixed ring 3 of φ534 × 3 circular ring by 40 × 3 flat steel.Cold state assembly, fixed ring 3 and sliding ring 4 overlap 10mm, and 1mm gap is provided between two.In the process of thermal expansion, sliding ring 4 can relatively slide on fixed ring 3, and the thermal expansion displacement of boiler head 6 is adapted by this sliding, avoid the damage to protection cover structure due to stress generated by thermal expansion.

[0022] When the boiler head 6 occurs thermal expansion, the sealing plate 2 plays the role of connecting and transmitting force, and transmits the expansion force of the head to the shield cylinder 1, and cooperates with the sliding ring 4 to realize the function of adapting to thermal expansion through the connection with the fixed ring 3, when the boiler head is moved outward due to thermal expansion, the sliding ring 4 is also moved outward, while the shield cylinder 1, the sealing plate 2 and the fixed ring 3 are fixed, so that the gap between the head shield and the furnace wall shield is avoided.

[0023] The inside of the shield cylinder 1 is filled with the insulation layer 5. During the operation of the boiler, the insulation layer 5 can reduce the heat loss to the outside and improve the thermal efficiency of the boiler, and can reduce the thermal stress caused by the temperature difference, thereby assisting the shield to adapt to thermal expansion to a certain extent. Meanwhile, the insulation layer 5 can also protect the shield cylinder 1 from being aged or damaged due to high temperature, thereby prolonging the service life of the shield.

[0024] In the above process, the device is simple and reliable in structure, easy to manufacture, and the stress generated when the boiler head is thermally expanded can be reasonably released through the ingenious design of the sliding ring and the fixed ring. The safety hazards such as deformation, cracking and even damage of the boiler head caused by the stress concentration of thermal expansion are avoided, the safety and stability of the boiler equipment during operation are greatly improved, the gap between the head shield and the furnace wall shield caused by the thermal expansion of the boiler is effectively solved, the heat loss of the gap part is avoided, and the overall appearance of the boiler is ensured. The structure of the present application is simple, practical, easy to operate and worth popularizing.

[0025] The above specific embodiments further illustrate the purpose, technical scheme and beneficial effects of the present application, and it should be understood that the above are only specific embodiments of the present application and are not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

[0026] In the description of the present application, it should be understood that the terms indicating the position or location relationship are based on the position or location relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application.

[0027] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be direct connection, also can indirectly connect through intermediate medium, can be two element internal communication or two element mutual action relationship.For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned terms in the utility model according to specific circumstances.

[0028] In the description of the utility model, it is to be explained that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on is based on the orientation or position relationship shown in the drawing, or is the orientation or position relationship of the utility model product when it is usually placed, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, so it can not be understood as a limitation on the utility model.In addition, the terms "first", "second", "third" and so on are only used for distinguishing description, and can not be understood as indicating or implying relative importance.

[0029] In addition, the terms "horizontal", "vertical", "overhang" and so on do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined."Horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0030] In the utility model, unless another definite provision and limitation, the first feature is above or below the second feature, which can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them.Furthermore, the first feature above, above and above the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature.The first feature below, below and below the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

Claims

1. A boiler head cover that adapts to the thermal expansion of a boiler, characterized in that: It includes a protective cover cylinder (1) welded and fixed to the furnace wall plate, a sealing plate (2) continuously welded and fixed to the protective cover cylinder (1), and a boiler head (6). One end of the sealing plate (2) is intermittently fixed and welded with a fixing ring (3); a sliding ring (4) is spot-welded to one side of the boiler head (6); the fixing ring (3) and the sliding ring (4) are compatible.

2. A boiler head cover adapted to boiler thermal expansion according to claim 1, characterized in that: The interior of the protective cover cylinder (1) is filled with an insulating layer (5).

3. A boiler head cover adapted to boiler thermal expansion according to claim 1, characterized in that: The sealing plate (2) is a circular plate with a thickness of 4mm, and the sealing plate (2) has an inner circular hole with a diameter of 522mm.

4. A boiler head cover adapted to boiler thermal expansion according to claim 1, characterized in that: The fixing ring (3) is a φ534×3 circular ring made of 40×3 flat steel.

5. A boiler head cover adapted to boiler thermal expansion according to claim 1, characterized in that: The sliding ring (4) is a φ526×3 circular ring made of 40×3 flat steel.

6. A boiler head cover adapted to boiler thermal expansion according to claim 1, characterized in that: When the fixed ring (3) and the sliding ring (4) are cold-assembled, they overlap by 10 mm; a gap of 1 mm is provided between the fixed ring (3) and the sliding ring (4).

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