Flue pressure fluctuation releaser

Abstract

The utility model relates to the technical field of flue pressure regulation and control, in particular to a flue pressure fluctuation releaser which comprises a flue communicated with a boiler, a notch is formed in the flue, a flexible sealing cover is arranged at the notch in a sealing mode, a buffering cavity is formed in the flexible sealing cover, and when pressure in the flue changes, the buffering cavity is communicated with the notch. And a buffer cavity in the flexible sealing cover becomes larger or smaller so as to reduce pressure fluctuation in the flue. According to the utility model, the pressure fluctuation in the flue is effectively relieved. When a boiler runs, pressure fluctuation generated by combustion can cause pressure change in a flue. According to the device, through the buffer cavity in the flexible sealing cover, an extra space can be provided for containing part of flue gas when the pressure is increased, so that the increasing speed of the pressure in the flue is reduced. On the contrary, when the pressure is reduced, the flexible sealing cover can be pressed into the flue, more space is occupied, and the reduction speed of the negative pressure or the influence of the negative pressure is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue pressure regulation and control technical field, concretely relates to a flue pressure fluctuation release ware. BACKGROUND

[0002] A large amount of flue gas and soot will be produced in the combustion process of a boiler, and if these combustion products are not discharged in time, they will accumulate in the boiler, affecting the normal operation and combustion efficiency of the boiler. The communication flue can smoothly discharge these combustion products from the boiler. In actual use, due to the instability of combustion and the change of fuel supply during the combustion process of the boiler, the pressure inside the boiler will fluctuate. These pressure fluctuations will be transmitted to the flue, causing the pressure in the flue to fluctuate. If the pressure fluctuation in the flue is too large, it will in turn affect the stability of the boiler combustion, forming a vicious cycle. The pressure fluctuation of the boiler and flue system will affect the stability of the entire thermal system and affect the thermal combustion efficiency, etc. SUMMARY

[0003] The utility model provides a kind of flue pressure fluctuation release ware to solve the technical problems such as the large flue pressure fluctuation in prior art, affect overall thermal system stability.

[0004] To solve the above problems, the flue pressure fluctuation release ware provided by the utility model adopts the following technical scheme:

[0005] It includes the flue communicated with the boiler and is provided with a slot on the flue, a flexible sealing cover is sealingly arranged at the slot, a buffer cavity is formed in the flexible sealing cover, and when the pressure in the flue fluctuates, the buffer cavity in the flexible sealing cover becomes larger or smaller to reduce the pressure fluctuation in the flue.

[0006] Further, a protective cover is detachably arranged outside the flexible sealing cover at the slot, one end of the protective cover extends out of the flue and the other end extends into the flue, and a through groove is formed on the structure of the protective cover in the flue.

[0007] The opening of the flexible sealing cover faces upwards and is externally connected, and the opening edge of the flexible sealing cover is sealingly connected with the upper end of the protective cover.

[0008] Further, a connecting piece is arranged at the slot and protrudes from the outer surface of the flue, and is used to connect the upper port of the protective cover, a first flange is arranged at the free end of the connecting piece, and a second flange corresponding to the first flange is arranged at the upper port of the protective cover.

[0009] Further, a protective piece is detachably arranged at the upper end of the protective cover to assist in protecting the flexible sealing cover, and the opening edge of the flexible sealing cover is sealingly pressed between the protective cover and the protective piece.

[0010] Further, the protective member comprises a connecting flange opposite to the second flange, and the opening edge of the flexible sealing cover is pressed between the second flange and the connecting flange, and the second flange and the connecting flange are provided with sealing pads on the sides opposite to the opening edge of the flexible sealing cover.

[0011] Further, the protective cover is in a cylindrical shape, and the protective member is a circular hollow plate, and the connecting flange is formed at the edge of the hollow plate.

[0012] Further, the protective cover is in a rectangular shape, and the protective member is a rectangular plate arranged opposite to the protective cover, the lower end of the protective member is an opening, and the connecting flange is formed at the edge of the lower opening.

[0013] Further, the upper side of the protective member is provided with a detachable protective plate.

[0014] Further, the second flange and the connecting flange are connected through a threaded long pin, and the protective plate is fixed on the threaded long pin through a nut.

[0015] The utility model discloses the beneficial effect is:

[0016] 1, the utility model discloses can effectively alleviate the pressure fluctuation in the flue. When the boiler runs, the pressure fluctuation produced by combustion can cause the pressure change in the flue. The device can provide an additional space to accommodate part of the flue gas when the pressure increases through the buffer cavity in the flexible sealing cover, thereby reducing the growth rate of the internal pressure of the flue. On the contrary, when the pressure decreases, the flexible sealing cover will be pressed into the flue, occupying more space, reducing the reducing speed of negative pressure or reducing the influence of negative pressure.

[0017] 2, in the utility model, the flexible sealing cover is limited through the protective cover and the protective member, avoids damaging the flexible sealing cover when the pressure fluctuation is too large, improves the service life of the flexible sealing cover, in addition, the protective cover and the protective member all adopt lightweight structure design, avoid too much increase on the load of the flue.

[0018] 3, in the utility model, the protective member is designed as a rectangular structure with a certain volume, increases the additional buffer space when the flexible sealing cover is inflated upwards, improves the adaptability and flexibility of the flexible sealing cover.

[0019] 4, in the utility model, the structure between each part is convenient to detach and connect, is convenient for installation and dismounting, also convenient for the maintenance management of later period, reduces the maintenance cost. DRAWINGS

[0020] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0021] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model, which is fitted onto the flue.

[0022] Figure 2 for Figure 1 A schematic diagram of the structure of region A shown;

[0023] Figure 3 This is a cross-sectional view of the structure of Embodiment 1 of this utility model;

[0024] Figure 4 for Figure 3 The diagram shows the structure of region B.

[0025] Figure 5 This is a partial structural schematic diagram of Embodiment 2 of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Boiler; 2. Flue; 21. Groove; 3. Flexible sealing cover; 31. Buffer chamber; 4. Protective cover; 41. Through groove; 42. Second flange; 5. Connecting piece; 51. First flange; 6. Protective piece; 61. Connecting flange; 62. Sealing gasket; 7. Protective plate; 8. Threaded long pin. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] The number of any elements in the accompanying drawings is for illustrative purposes only and not as a limitation, and any naming is for distinction only and has no limiting meaning.

[0030] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0031] Example 1 of the flue pressure fluctuation release device provided by this utility model:

[0032] like Figures 1 to 5As shown, the flue 2 is connected with the boiler 1, and the flue 2 is provided with a slot 21, and the flexible sealing cover 3 is sealingly arranged at the slot 21, and the buffer cavity 31 is formed in the flexible sealing cover 3, and when the pressure in the flue 2 changes, the buffer cavity 31 in the flexible sealing cover 3 becomes larger or smaller to reduce the pressure fluctuation in the flue 2.

[0033] In the specific use process, when the boiler 1 is running, the combustion process of the boiler 1 will fluctuate, and the combustion pressure fluctuation of the boiler 1 will cause the pressure in the flue 2 to fluctuate. When the pressure fluctuation in the flue 2 becomes larger than the external atmospheric pressure, the flue gas in the flue 2 blows the flexible sealing cover 3 out of the flue 2, and the flexible sealing cover 3 is outside the flue 2 to form an expansion cavity, which provides an additional space for the flue 2. When the internal pressure of the flue 2 increases, part of the flue gas can flow into the expansion cavity, thereby slowing down the pressure growth rate in the flue 2, playing a buffering role and reducing the pressure fluctuation in the flue 2.

[0034] Conversely, when the pressure fluctuation in the flue 2 becomes smaller than the external atmospheric pressure, a negative pressure state is formed in the flue 2, the flexible sealing cover 3 is pressed into the flue 2, and the flexible sealing cover 3 is lifted up and occupies the space in the flue 2. By changing the volume of the flue 2, the pressure is indirectly adjusted. When the flexible sealing cover 3 is lifted up and occupies more space, the volume of the flue 2 will decrease accordingly, which will slow down the negative pressure reduction speed or reduce the negative pressure effect to some extent, thereby reducing the pressure fluctuation in the flue 2.

[0035] In the embodiment, the flexible sealing cover 3 is made of oxford cloth coated with a PVC layer or a PU layer, but is not limited thereto, which remains flexible and can ensure that the flue gas in the flue 2 does not enter the workshop through the flexible sealing cover 3.

[0036] In addition, the flexible sealing cover 3 is sealingly connected to the slot 21 to prevent the flue gas in the flue 2 from escaping from the connection.

[0037] In the embodiment, the slot 21 is detachably provided with a protective cover 4 sleeved on the outside of the flexible sealing cover 3, one end of the protective cover 4 extends out of the flue 2 and the other end extends into the flue 2, and the protective cover 4 is provided with a through groove 41 on the structure in the flue 2.

[0038] It should be noted that when the flexible sealing cover 3 is pressed into the flue 2 and completely lifted up, the flexible sealing cover 3 is attached to the inner wall of the protective cover 4.

[0039] The protective cover 4 extends out of the flue 2 at one end and extends into the flue 2 at the other end, which is configured to form a buffer cavity for the flexible sealing cover 3 inside and outside the flue 2. The protective cover 4 protects the flexible sealing cover 3 itself, avoiding the flexible sealing cover 3 from being broken when the pressure fluctuation is too large, and improving the service life of the flexible sealing cover 3. The through slot 41 can ensure that the flue gas in the flue 2 enters the protective cover 4 to act on the flexible sealing cover 3.

[0040] In this embodiment, the side wall and the bottom surface of the protective cover 4 are both provided with the through slot 41, which on the one hand ensures the flue gas flow, and on the other hand plays a role in weight reduction.

[0041] In this embodiment, the notch 21 is provided with a connecting piece 5 protruding from the outer surface of the flue 2 and used for connecting the upper port of the protective cover 4. The free end of the connecting piece 5 is provided with a first flange 51, and the upper port of the protective cover 4 is provided with a second flange 42 corresponding to the first flange 51 for matched connection. The detachable connection of the protective cover 4 is realized through the connecting piece 5. It is convenient for installation and disassembly, and also convenient for later maintenance and management.

[0042] It should be noted that the protective cover 4 is in the shape of a cylinder, the inner wall of the connecting piece 5 is also circular in cross section, and the inner wall is tightly fitted with the outer wall of the protective cover 4 to ensure the sealing property.

[0043] In this embodiment, the upper end of the protective cover 4 is detachably provided with a protective piece 6 for assisting in protecting the flexible sealing cover 3. The opening edge of the flexible sealing cover 3 is tightly sealed between the protective cover 4 and the protective piece 6. The protective piece 6 at the upper end of the protective cover 4 plays a certain limiting role on the bulging of the flexible sealing cover 3 at the upper end, avoiding the flexible sealing cover 3 from being broken when it bulges upward due to excessive pressure fluctuation.

[0044] The protective piece 6 includes a connecting flange 61 opposite to the second flange 42. The opening of the flexible sealing cover 3 faces upward and is in communication with the outside. The opening edge of the flexible sealing cover 3 is sealingly connected with the upper end of the protective cover 4.

[0045] Specifically, the opening edge of the flexible sealing cover 3 is tightly pressed between the second flange 42 and the connecting flange 61. The second flange 42 and the connecting flange 61 are both provided with a sealing gasket 62 on the side opposite to the opening edge of the flexible sealing cover 3.

[0046] The above structure realizes the sealing arrangement of the flexible sealing cover 3, which on the one hand ensures the sealing property, and on the other hand facilitates the disassembly and installation of the flexible sealing cover 3, facilitates replacement, and reduces maintenance cost.

[0047] In this embodiment, the protective cover 4 is in the shape of a cylinder, and the protective piece 6 is in the shape of a circular hollow plate. The connecting flange 61 is formed at the edge of the hollow plate. The hollow plate is rigid, which on the one hand ensures the protective effect, and on the other hand meets the lightweight design.

[0048] In the embodiment, the protector 6 is provided with a detachable protective plate 7 above.

[0049] The second flange 42 and the connecting flange 61 are connected through the threaded long pin 8, and the protective plate 7 is fixed on the threaded long pin 8 through a nut.

[0050] The protective plate 7 is arranged to avoid sundries from falling into the flexible sealing cover 3.

[0051] The embodiment 2 of the flue pressure fluctuation release device is provided in the utility model.

[0052] The difference between the embodiment 1 and the embodiment 2 is that the protective cover 4 is rectangular, the protector 6 is rectangular and is arranged opposite to the protective cover 4, the lower end of the protector 6 is open, and the connecting flange 61 is formed on the edge of the lower end.

[0053] It should be noted that the protective cover 4 is rectangular, the inner wall of the connecting piece 5 is also rectangular, and the inner wall is tightly combined with the outer wall of the protective cover 4 to ensure the sealing property.

[0054] In the embodiment 1, the protector 6 is a hollow plate. The protector 6 is designed as a rectangular structure with a certain volume, the extra buffer space of the flexible sealing cover 3 is increased when the flexible sealing cover 3 is inflated upward, and the adaptability and flexibility of the flexible sealing cover 3 are improved.

[0055] According to the above description of the present specification, those skilled in the art can also understand the terms used as follows, for example, the terms indicating the orientation or position relationship such as "upper", "lower", "front", "rear", "left", "right", "width", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or position relationship shown in the drawings of the present specification, and are only for the purpose of facilitating the description of the scheme of the utility model and simplifying the description, and do not explicitly or implicitly indicate or imply that the devices or elements involved must have the specific orientation, be constructed and operated in the specific orientation, therefore, the above orientation or position relationship terms cannot be understood or interpreted as a limitation on the scheme of the utility model.

[0056] In addition, in the description of the present specification, the meaning of "a plurality of" is at least two, for example, two, three or more, etc., unless otherwise specifically limited.

Claims

1. A flue pressure surge absorber characterised by, The utility model provides a flexible sealing cover (3) is sealed to the flue (2) of boiler (1) and is provided with a notch (21), and the flexible sealing cover (3) is formed with a buffer cavity (31) in it, when the pressure in the flue (2) changes, the buffer cavity (31) in the flexible sealing cover (3) becomes larger or smaller to reduce the pressure fluctuation in the flue (2).

2. The flue pressure surge reliever according to claim 1, wherein The notch (21) is detachably provided with a protective cover (4) sleeved outside the flexible sealing cover (3), one end of the protective cover (4) extends out of the flue (2) and the other end extends into the flue (2), and the protective cover (4) is provided with a through groove (41) in the structure in the flue (2). The opening of the flexible sealing cover (3) faces upwards and is externally connected, and the opening edge of the flexible sealing cover (3) is sealingly connected to the upper end of the protective cover (4).

3. The flue pressure surge reliever according to claim 2, wherein The notch (21) is provided with a connecting piece (5) protruding from the outer surface of the flue (2) and used for connecting the upper port of the protective cover (4), the free end of the connecting piece (5) is provided with a first flange (51), and the upper port of the protective cover (4) is provided with a second flange (42) corresponding to the first flange (51) for matched connection.

4. The flue pressure surge reliever according to claim 3, wherein The upper end of the protective cover (4) is detachably provided with a protective piece (6) for assisting in protecting the flexible sealing cover (3), and the opening edge of the flexible sealing cover (3) is sealingly compressed between the protective cover (4) and the protective piece (6).

5. The flue pressure surge reliever according to claim 4, wherein, The protective piece (6) includes a connecting flange (61) opposite to the second flange (42), the opening edge of the flexible sealing cover (3) is compressed between the second flange (42) and the connecting flange (61), and the second flange (42) and the connecting flange (61) are both provided with a sealing gasket (62) on the side opposite to the opening edge of the flexible sealing cover (3).

6. The flue pressure surge reliever according to claim 5, wherein, The protective cover (4) is in the shape of a cylinder, and the protective piece (6) is in the shape of a circular hollow plate, and the connecting flange (61) is formed at the edge of the hollow plate.

7. The flue pressure surge reliever according to claim 5, wherein The protective cover (4) is in the shape of a rectangle, and the protective piece (6) is in the shape of a rectangle opposite to the protective cover (4), the lower end of the protective piece (6) is open, and the connecting flange (61) is formed at the edge of the lower port.

8. A flue pressure surge relief according to any of claims 6 or 7, characterised in that, The upper part of the protective piece (6) is provided with a detachable protective plate (7).

9. The flue pressure surge reliever according to claim 8, wherein, The second flange (42) and the connecting flange (61) are connected by a threaded long pin (8), and the protective plate (7) is fixed on the threaded long pin (8) by a nut.

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