Wear-resistant hood

Abstract

The utility model discloses a wear-resistant hood. The utility model relates to the technical field of heat supply instruments. A wear-resistant hood comprises a hood core tube and hood bell jars, the hood bell jars sleeve the hood core tube at intervals to form a circulation cavity, a lower hem of each hood bell jar is hermetically connected with the hood core tube, and a fixing block for hermetically connecting the hood bell jars and the hood core tube is arranged between the top end of each hood bell jar and the hood core tube. An air hole communicated with the circulation cavity is formed in the position, close to the air fixing block, of the annular side of the air cap core pipe in a penetrating mode, an air outlet communicated with the circulation cavity is formed in the position, away from the fixing block, of the annular side of the air cap bell jar, and an anti-abrasion steel belt set is arranged on the outer side of the air cap bell jar. According to the utility model, the structural style of the bell jar of the wind cap is improved, so that the outer wall of the bell jar of the wind cap is prevented from being directly scoured by high-temperature slag, an anti-abrasion effect on the bell jar of the wind cap is achieved, and the service life of the wind cap is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of heating apparatus, concretely relates to a wear -resisting hood. BACKGROUND

[0002] As an advanced coal combustion technology, circulating fluidized bed combustion technology has been widely applied in power station boilers and industrial boilers. The air distribution plate hood is one of the key components of the circulating fluidized bed boiler combustion equipment, and its performance directly affects the fluidization condition of the fluidized bed boiler and the flow, combustion and heat transfer process in the combustion chamber, thereby affecting the performance of the fluidized bed boiler.

[0003] After the boiler is shut down, the hood is damaged almost every time, and the hood bell jar of the damaged hood is worn to varying degrees. The hood bell jar is prone to wear due to the following reasons: the air distribution plate hood bell jar mainly operates in the "slag surrounding layer" at 700-950 DEG C, and at the same time, the outside is subjected to the active friction of the slag, and the inside is subjected to the erosion of the hot primary air at 150-290 DEG C and high pressure head. The thermal stress on the inside and outside of the hood bell jar is large. On the other hand, in order to make the air distribution of the entire air distribution plate uniform, a sufficient number of hoods are arranged on the air distribution plate. Therefore, the spacing between the adjacent two hoods is small, and the air blown out of the air outlet of the hood causes the large particles in the furnace to impact and wear the bell jar of the adjacent hood, resulting in accelerated wear of the air outlet area of the bell jar. SUMMARY

[0004] The utility model provides a wear -resisting hood, in order to solve the problem of easy wear of the hood, short operation cycle, large amount of power plant overhaul.

[0005] The embodiment of the utility model realizes the following technical scheme:

[0006] A wear -resisting hood, including the hood core pipe and the hood bell jar, the hood bell jar is sleeved in the hood core pipe and forms a flow cavity, the lower hem of the hood bell jar is sealingly connected with the hood core pipe, a fixing block for sealingly connecting the hood bell jar and the hood core pipe is arranged between the top end of the hood bell jar and the hood core pipe, a gas hole communicating with the flow cavity is arranged on the side of the hood core pipe close to the fixing block, and an air outlet communicating with the flow cavity is arranged on the side of the hood bell jar away from the fixing block, and a wear -resisting steel belt group is arranged on the outside of the hood bell jar.

[0007] The fixing block is used for connecting the hood core pipe and the hood bell jar and plays a sealing role, preventing the hot primary air at high pressure head from being blown out of the upper end of the hood core pipe. The wear -resisting steel belt group guides the high-temperature slag, avoids the high-temperature slag directly eroding the outer wall of the hood bell jar, plays a wear -resisting role on the outer wall of the hood bell jar, prolongs the service life of the outer wall of the hood bell jar, and reduces the replacement frequency of the wear -resisting hood.

[0008] In some technical schemes of the utility model, the anti-abrasion steel belt group comprises a plurality of wear-resistant rings, and the central axis of any wear-resistant ring is at a first preset angle with the central axis of the hood bell.

[0009] The wear-resistant rings can to some extent guide the high-temperature slag horizontally, avoiding the direct scouring of the high-temperature slag on the outer wall of the hood bell

[0010] In some technical schemes of the utility model, the anti-abrasion steel belt group and the hood bell are integrally formed.

[0011] The anti-abrasion steel belt group and the hood bell are integrally formed by casting, and the stability and abrasion resistance are relatively better.

[0012] In some technical schemes of the utility model, the angle value of any first preset angle is zero.

[0013] This design is more helpful for the hood bell to disperse stress when stressed and reduce local stress concentration, thereby improving the overall durability of the hood bell.

[0014] In some technical schemes of the utility model, any first preset angle is an acute angle.

[0015] This design makes the abrasion more uniform and prolongs the overall service life.

[0016] In some technical schemes of the utility model, the anti-abrasion steel belt group comprises a plurality of wear-resistant rings, and the central axis of any wear-resistant ring is at a first preset angle with the central axis of the hood bell.

[0017] The assumption of the wear-resistant rings can further increase the abrasion resistance of the outer wall of the hood bell.

[0018] In some technical schemes of the utility model, the plurality of wear-resistant rings are arranged at equal intervals.

[0019] The plurality of wear-resistant rings arranged at equal intervals can disperse the impact force from the high-temperature slag to each wear-resistant ring, reduce the excessive abrasion of a single part, and thereby prolong the overall service life

[0020] In some technical schemes of the utility model, the angle value of any second preset angle is zero.

[0021] The central axis of the wear-resistant ring is collinear with the central axis of the hood bell, and the wear-resistant ring is equivalent to being vertically arranged outside the hood bell, thereby increasing the abrasion resistance of the hood bell in the vertical direction and improving the overall durability of the hood bell.

[0022] In some technical schemes of the utility model, any second preset angle is an acute angle.

[0023] The inclined wear-resistant strips can more effectively disperse the impact force from the high-temperature slag, because they form multiple angular contact points on the outer wall of the hood bell, reducing direct friction in a single direction, and the design makes the wear more uniform, prolonging the overall service life.

[0024] In some technical solutions of the utility model, the thickened layer is arranged at the air outlet on the outer side of the hood bell.

[0025] The thickened layer is arranged at the air outlet, which plays a role of wear protection for the air outlet of the hood bell, thereby prolonging the service life of the air outlet area of the hood bell.

[0026] The technical scheme of the utility model has at least the following advantages and beneficial effects:

[0027] The utility model adds the wear-resistant steel belt group to the outer wall of the hood bell, guides the high-temperature slag, avoids direct scouring of the high-temperature slag to the outer wall of the hood bell, further improves the wear resistance of the outer wall of the hood bell, increases the service life, reduces the replacement frequency, and solves the problem of large maintenance amount. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structure schematic view of a wear-resistant hood in the utility model embodiment;

[0029] Figure 2 It is a structure view of a hood bell in the wear-resistant hood in the utility model embodiment;

[0030] Figure 3 It is a second structure view of a hood bell in the wear-resistant hood in the utility model embodiment;

[0031] Figure 4 It is a third structure view of a hood bell in the wear-resistant hood in the utility model embodiment;

[0032] Figure 5 It is a fourth structure view of a hood bell in the wear-resistant hood in the utility model embodiment;

[0033] Figure 6 It is a fifth structure view of a hood bell in the wear-resistant hood in the utility model embodiment;

[0034] Figure 7 It is a sixth structure view of a hood bell in the wear-resistant hood in the utility model embodiment;

[0035] Figure 8 It is a seventh structure view of a hood bell in the wear-resistant hood in the utility model embodiment;

[0036] Figure 9The utility model discloses a structure diagram eight of wind hat bell jar in a wear -resisting hood.

[0037] Icon: 1 - wind hat core pipe, 2 - wind hat bell jar, 3 - flow through cavity, 4 - fixed block, 5 - air hole, 6 - air outlet, 7 - wear -resisting steel band group, 8 - wear -resisting ring, 9 - wear -resisting strip, 10 - thickening layer. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the following will combine the drawings in the utility model embodiment, and the technical scheme in the utility model embodiment is clearly and completely described, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. The components of the utility model embodiment described and shown in the drawing here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiment of the utility model provided in the drawing is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0040] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0041] In the description of the utility model, it needs to be explained that if the position or location relationship indicated by the terms "inner", "outer" and the like appears, it is based on the position or location relationship shown in the drawing, or the position or location relationship of the utility model product when it is usually placed, which is only for the convenience of describing the utility model and simplifying the description, and is not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0042] In the description of the utility model, it also needs to be explained that unless otherwise explicitly specified and limited, if the terms "set", "install", "configure", "connect" appear, they should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, can be electrically connected, can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0043] EMBODIMENT

[0044] Please refer to Figures 1-9 The present embodiment provides a wear-resistant hood. The wear-resistant hood comprises a hood core pipe 1 and a hood bell jar 2, the hood bell jar 2 is sleeved on the hood core pipe 1 to form a flow-through cavity 3, the lower hem of the hood bell jar 2 is sealingly connected with the hood core pipe 1, a fixing block 4 for sealingly connecting the hood bell jar 2 and the hood core pipe 1 is arranged between the top end of the hood bell jar 2 and the hood core pipe 1, a plurality of air holes 5 for communicating with the flow-through cavity 3 are arranged through the ring side of the hood core pipe 1 close to the fixing block 4, and a plurality of air outlets 6 for communicating with the flow-through cavity 3 are arranged on the ring side of the hood bell jar 2 away from the fixing block 4. A wear-resistant steel belt group 7 is arranged on the outer side of the hood bell jar 2.

[0045] The principle of the wear-resistant hood is as follows: the number of the air holes 5 is multiple, and the multiple air holes 5 are arranged at equal intervals in the circumferential direction; one end of the fixing block 4 is arranged through the hood core pipe 1 and sealingly welded with the hood core pipe 1, then the fixing block 4 is arranged through the hood bell jar 2 and sealingly welded with the hood bell jar 2, then the lower hem of the hood bell jar 2 is sealingly welded with the ring side of the hood core pipe 1, so that the flow-through cavity 3 can only flow through the air holes 5 and the air outlets 6; the number of the air outlets 6 is multiple, preferably four; the central axis of the air outlet 6 is inclined away from one end of the hood core pipe 1 away from the fixing block 4; when the wear-resistant hood starts to work, the hot primary air of the high pressure head enters from the lower part of the wear-resistant hood, that is, the hot primary air enters through the hood core pipe 1, the gas flows into the flow-through cavity 3 through the multiple air holes 5 after entering the hood core pipe 1, and finally blows out from the air outlets 6 of the hood bell jar 2, so as to fluidize the high-temperature slag in the hood area. Among them, because the central axis of the air outlet 6 is inclined away from one end of the hood core pipe 1 away from the fixing block 4, the hot primary air is inclined downward, which can reduce the wear of the hood bell jar 2 of the adjacent wear-resistant hood to a certain extent.

[0046] The fixing block 4 is used to connect the hood core pipe 1 and the hood bell jar 2 and plays a sealing role to prevent the hot primary air of the high pressure head from blowing out from the upper end of the hood core pipe 1; the wear-resistant steel belt group guides the high-temperature slag to avoid direct scouring of the high-temperature slag on the outer wall of the hood bell jar 2, plays a wear-resistant role on the outer wall of the hood bell jar 2, prolongs the service life of the outer wall of the hood bell jar 2, and reduces the replacement frequency of the wear-resistant hood.

[0047] As a more preferred embodiment, the wear-resistant steel belt group 7 comprises a plurality of wear-resistant rings 8, and the central axis of any wear-resistant ring 8 is at a first preset angle with the central axis of the hood bell jar 2.

[0048] In the above embodiment, the plurality of wear-resistant rings 8 are arranged at equal intervals; the addition of the wear-resistant rings 8 can guide the high-temperature slag in the horizontal direction to a certain extent to avoid direct scouring of the high-temperature slag on the outer wall of the hood bell jar 2; the equal interval arrangement of the plurality of wear-resistant rings 8 can disperse the impact force from the high-temperature slag to each wear-resistant ring 8, reduce the excessive wear of a single part, and thus prolong the overall service life.

[0049] As a preferred embodiment, the wear-resistant steel belt group 7 and the bell-shaped hood 2 are integrally formed.

[0050] The wear-resistant steel belt group and the bell-shaped hood are integrally formed by casting, and the stability and wear resistance are relatively better.

[0051] As a preferred embodiment, the angle value of any of the first preset angles is zero.

[0052] In the above embodiment, the central axis of the wear-resistant ring 8 is collinear with the central axis of the bell-shaped hood 2, and the wear-resistant ring 8 is equivalent to being vertically arranged on the outside of the bell-shaped hood 2. The vertical arrangement is more helpful for the bell-shaped hood 2 to disperse stress when it is under stress, reducing the situation of local stress concentration, thereby improving the overall durability of the bell-shaped hood 2.

[0053] As a preferred embodiment, any of the first preset angles is an acute angle.

[0054] In the above embodiment, the first preset angle is an acute angle, that is, the central axis of the wear-resistant ring 8 intersects with the central axis of the bell-shaped hood 2, and the wear-resistant ring 8 is equivalent to being arranged on the outside of the bell-shaped hood 2 along the transverse direction of the bell-shaped hood 2. The inclined wear-resistant ring 8 can more effectively disperse the impact force from the high-temperature slag, because they form multiple angle contact points on the outer wall of the bell-shaped hood 2, reducing direct friction in a single direction. This design makes the wear more uniform, prolonging the overall service life.

[0055] As a preferred embodiment, the wear-resistant steel belt group 7 includes a plurality of wear-resistant strips 9, and any of the wear-resistant strips 9 is at a second preset angle with the central axis of the bell-shaped hood 2.

[0056] In the above embodiment, the assumption of the wear-resistant strip 9 can further increase the wear resistance of the outer wall of the bell-shaped hood 2.

[0057] As a preferred embodiment, the plurality of wear-resistant strips 9 are arranged at equal intervals.

[0058] The plurality of wear-resistant strips 9 are arranged at equal intervals, which can disperse the impact force from the high-temperature slag to each wear-resistant strip 9, reducing excessive wear of a single part, thereby prolonging the overall service life

[0059] As a preferred embodiment, the angle value of any of the second preset angles is zero.

[0060] In the above embodiment, the central axis of the wear-resistant strip 9 is collinear with the central axis of the bell-shaped hood 2, and the wear-resistant ring 8 is equivalent to being vertically arranged on the outside of the bell-shaped hood 2, increasing the wear resistance of the bell-shaped hood 2 in the vertical direction, thereby improving the overall durability of the bell-shaped hood 2, and the wear-resistant ring 8 is used in cooperation.

[0061] As a preferred embodiment, the second preset angle is an acute angle.

[0062] In the above embodiment, the second preset angle is an acute angle, that is, the central axis of the wear-resistant strip 9 intersects with the central axis of the bell 2, and the wear-resistant strip 9 is equivalent to being arranged on the outer side of the bell 2 in the vertical direction of the bell 2. The inclined wear-resistant strip 9 can more effectively disperse the impact force from the high-temperature slag, because they form multiple angle contact points on the outer wall of the bell 2, reducing direct friction in a single direction. This design makes the wear more uniform, prolonging the overall service life.

[0063] As a preferred embodiment, the bell 2 outside is provided with a thickened layer 10 at the air outlet 6, and the air outlet 6 penetrates the thickened layer 10.

[0064] In the above embodiment, the air outlet 6 adopts the thickened layer 10, which plays a role in preventing wear of the air outlet 6 of the bell 2, thereby prolonging the service life of the air outlet 6 of the bell 2.

[0065] In summary, the embodiments of the present application provide a wear-resistant bell, which improves the wear resistance of the air outlet 6 of the bell 2 by thickening the design of the air outlet 6 of the bell 2. By increasing the wear-resistant steel belt group 7 on the outer wall of the bell 2, the high-temperature slag is guided to avoid direct scouring of the outer wall of the bell 2, thereby improving the wear resistance of the outer wall of the bell 2, and solving the problems of easy wear of the bell, short operation cycle, and large amount of power plant maintenance.

[0066] The above is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously modified and changed. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A wear-resistant hood, comprising a hood core pipe (1) and a hood bell jar (2), the hood bell jar (2) is sleeved on the hood core pipe (1) to form a flow cavity (3), the lower hem of the hood bell jar (2) is sealingly connected with the hood core pipe (1), a fixing block (4) for sealingly connecting the hood bell jar (2) and the hood core pipe (1) is arranged between the top end of the hood bell jar (2) and the hood core pipe (1), a gas hole (5) in communication with the flow cavity (3) is arranged through the side of the hood core pipe (1) close to the fixing block (4), and an air outlet (6) in communication with the flow cavity (3) is arranged on the side of the hood bell jar (2) away from the fixing block (4), characterized in that, The outer side of the hood bell jar (2) is provided with an abrasion-resistant steel belt group (7).

2. The gaiter of claim 1, wherein, The abrasion-resistant steel belt group (7) comprises a plurality of wear-resistant rings (8), and the central axis of any wear-resistant ring (8) is at a first preset angle with the central axis of the hood bell jar (2).

3. The gaiter of claim 2, wherein, The abrasion-resistant steel belt group (7) and the hood bell jar (2) are integrally formed.

4. The gaiter of claim 3, wherein, The angle value of any first preset angle is zero.

5. The gaiter of claim 3, wherein, Any first preset angle is an acute angle.

6. The gaiter according to any one of claims 1-5, wherein, The abrasion-resistant steel belt group (7) comprises a plurality of wear-resistant strips (9), and any wear-resistant strip (9) is at a second preset angle with the central axis of the hood bell jar (2).

7. The gaiter of claim 6, wherein, The plurality of wear-resistant strips (9) are arranged at equal intervals.

8. The gaiter of claim 7, wherein, The angle value of any second preset angle is zero.

9. The gaiter of claim 7, wherein, Any second preset angle is an acute angle.

10. The gaiter of claim 1, wherein, The outer side of the hood bell jar (2) is provided with a thickened layer (10) at the air outlet (6), and the air outlet (6) passes through the thickened layer (10).

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