CN217635730U - Novel bellows structure suitable for big bellows - Google Patents
Novel bellows structure suitable for big bellows Download PDFInfo
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- CN217635730U CN217635730U CN202220755573.5U CN202220755573U CN217635730U CN 217635730 U CN217635730 U CN 217635730U CN 202220755573 U CN202220755573 U CN 202220755573U CN 217635730 U CN217635730 U CN 217635730U
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Abstract
The utility model relates to a novel bellows structure suitable for big bellows, include: the T-shaped air inlet pipe comprises a first pipe and a second pipe, the first pipe is vertical to the second pipe, one end of the first pipe is connected to the middle of the second pipe and communicated with the second pipe, and air inlets are formed in two ends of the second pipe; the first bellows cavity, the second bellows cavity and the third bellows cavity that set gradually, the input of first bellows cavity, second bellows cavity and third bellows cavity all communicate with the other end of first pipe, and the output all is equipped with the spout. Compared with the prior art, the utility model discloses a mode of air supply entry is regarded as with bellows middle part position after the both sides air supply mixes, has reduced the on-way resistance that the air supply reachd bellows middle part region, has reduced the inside influence of both sides fan air supply pressure inequality to bellows.
Description
Technical Field
The utility model belongs to the technical field of coal-fired power generation and specifically relates to a novel bellows structure suitable for big bellows is related to.
Background
The main air in the boiler is sent into a hearth by a fan through an air box, and the air box has important influence on the distribution of air quantity. The main large bellows type adopted at present has the following defects: the air supply inlets are arranged at the two sides of the air box, and the middle part of the air box is seriously lack of air under the influence of on-way resistance; the inside of the air box is overlarge, the air pressure at each position is different, the flow field in the air box is disordered and changeable, and each nozzle is difficult to adjust uniformly.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a novel bellows structure suitable for big bellows adopts the mixed back of both sides air supply to regard as the mode of air supply entry with bellows middle part position, has reduced the on-way resistance that the air supply reachd bellows middle part region, has reduced the inside influence of both sides fan air supply pressure inequality to bellows.
The purpose of the utility model can be realized through the following technical scheme:
a novel bellows structure suitable for big bellows includes:
the T-shaped air inlet pipe comprises a first pipe and a second pipe, the first pipe is perpendicular to the second pipe, one end of the first pipe is connected to the middle of the second pipe and communicated with the second pipe, and air inlets are formed in two ends of the second pipe;
the first bellows cavity, second bellows cavity and the third bellows cavity that set gradually, the input of first bellows cavity, second bellows cavity and third bellows cavity all communicates with the other end of first pipe, and the output all is equipped with the spout.
The first bellows chamber and the first pipe are communicated through a first adjusting valve, the second bellows chamber and the first pipe are communicated through a second adjusting valve, and the third bellows chamber and the first pipe are communicated through a third adjusting valve.
The sectional area of the output end of the second bellows chamber is larger than that of the input end.
The first bellows chamber and the third bellows chamber are mirror symmetric.
The second bellows chamber is of axisymmetrical design.
And the first bellows chamber, the second bellows chamber and the third bellows chamber are all provided with at least 2 nozzles.
The sectional area of the second bellows chamber is gradually enlarged from the input end to the output end.
The second bellows chamber comprises a first sub chamber and a second sub chamber, wherein two ends of the first sub chamber are respectively connected with the first pipe and the second sub chamber, and the sectional area of the first sub chamber is smaller than that of the second sub chamber.
The first tube is shorter in length than the second tube.
The pipe diameter of the first pipe is less than twice of the pipe diameter of the second pipe.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the mode that the middle position of the air box is used as an air supply inlet after air supply at two sides is mixed is adopted, the on-way resistance of the air supply reaching the middle area of the air box is reduced, and the influence of uneven air supply pressure of the fans at two sides on the inside of the air box is reduced.
2. Divide into the multizone with bellows, reduce the influence of flow field confusion in the bellows to the spout.
3. The air pressure of each air box area is adjusted by adopting the valve to adjust air, and the uniformity of air volume distribution is effectively improved.
4. The first bellows chamber and the third bellows chamber are mirror symmetric, which can reduce control parameters and simplify control logic.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another embodiment of the present invention;
wherein: 1. the air inlet, 2, the air inlet, 3, the first regulating valve, 4, the second regulating valve, 5, the third regulating valve, 6, the first air box chamber, 7, the second air box chamber, 8, the third air box chamber, 9 and the nozzle.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
A novel bellows structure suitable for large bellows, as shown in fig. 1, comprising:
the T-shaped air inlet pipe comprises a first pipe and a second pipe, the first pipe and the second pipe are vertical, one end of the first pipe is connected to the middle of the second pipe and communicated with the second pipe, and air inlets 1 and 2 are respectively arranged at two ends of the second pipe;
the first bellows cavity 6, the second bellows cavity 7 and the third bellows cavity 8 that set gradually, the input of first bellows cavity 6, second bellows cavity 7 and third bellows cavity 8 all communicate with the other end of first pipe, and the output all is equipped with spout 9.
The mode that the middle position of the air box is used as an air supply inlet after air supply at two sides is mixed is adopted, the on-way resistance of the air supply reaching the middle area of the air box is reduced, and the influence of uneven air supply pressure of the fans at two sides on the inside of the air box is reduced. And the air box is divided into a plurality of areas, so that the influence of flow field disorder in the air box on the nozzles 9 is reduced.
In this embodiment, the first bellows chamber 6 and the third bellows chamber 8 are mirror-symmetric, and the second bellows chamber 7 is designed to be axisymmetric, and since the first bellows chamber 6 and the third bellows chamber 8 are mirror-symmetric, control parameters can be reduced, and control logic can be simplified.
Specifically, the cross-sectional area of the output end of the second bellows chamber 7 is larger than the cross-sectional area of the input end, for example, in an embodiment, as shown in fig. 1, the second bellows chamber 7 includes a first sub-chamber and a second sub-chamber, two ends of the first sub-chamber are respectively connected to the first pipe and the second sub-chamber, and the cross-sectional area of the first sub-chamber is smaller than that of the second sub-chamber, which has a better effect on the pressure stabilization of the first bellows chamber 6 and the third bellows chamber 8. It is of course also possible, in a manner similar to that shown in figure 2, for the cross-sectional area of the second bellows chamber 7 to diverge from the input end to the output end.
As shown in FIG. 1, in this embodiment at least 2 jets 9 are provided on each of the first windbox chamber 6, the second windbox chamber 7 and the third windbox chamber 8.
In this embodiment, the length of the first tube is smaller than that of the second tube, and the tube diameter of the first tube is smaller than twice of that of the second tube. The pressure in the first pipe can thereby be increased, increasing the maximum flow rate of the regulating valve.
In this application, the fan air supply gets into and mixes the back from two positions of air intake 1 and air intake 2 respectively, gets into different bellows cavities respectively behind three governing valve, then gets into furnace through spout 9. The air pressure in the three air box cavities can be changed by controlling the three regulating valves, and the air quantity of each nozzle 9 is controlled.
Claims (10)
1. A novel bellows structure suitable for big bellows, its characterized in that includes:
the T-shaped air inlet pipe comprises a first pipe and a second pipe, the first pipe and the second pipe are vertical, one end of the first pipe is connected to the middle of the second pipe and communicated with the second pipe, and air inlets are formed in two ends of the second pipe;
the first bellows cavity, second bellows cavity and the third bellows cavity that set gradually, the input of first bellows cavity, second bellows cavity and third bellows cavity all communicates with the other end of first pipe, and the output all is equipped with the spout.
2. A novel bellows structure suitable for large bellows according to claim 1 wherein the first bellows chamber and the first tube communicate through a first regulating valve, the second bellows chamber and the first tube communicate through a second regulating valve, and the third bellows chamber and the first tube communicate through a third regulating valve.
3. A novel windbox structure suitable for large windboxes according to claim 1 wherein the cross-sectional area of the output end of the second windbox chamber is greater than the cross-sectional area of the input end.
4. A novel bellows construction suitable for large bellows according to claim 1 wherein the first and third bellows chambers are mirror symmetric.
5. A novel windbox structure suitable for large windboxes according to claim 4 wherein the second windbox chamber is of axisymmetric design.
6. A novel windbox structure suitable for large windboxes according to claim 1 wherein at least 2 jets are provided on each of the first, second and third windbox chambers.
7. A novel windbox construction suitable for large windboxes according to claim 1 wherein the cross-sectional area of the second windbox chamber is gradually expanding from the input end to the output end.
8. The novel bellows structure suitable for a large bellows according to claim 1, wherein the second bellows chamber comprises a first sub-chamber and a second sub-chamber, the two ends of the first sub-chamber are respectively connected with a first pipe and the second sub-chamber, and the sectional area of the first sub-chamber is smaller than that of the second sub-chamber.
9. A novel windbox structure suitable for large windboxes according to claim 1 wherein the first tube is shorter in length than the second tube.
10. A novel windbox structure suitable for large windboxes according to claim 1 wherein the first tube has a tube diameter less than twice the tube diameter of the second tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220755573.5U CN217635730U (en) | 2022-03-31 | 2022-03-31 | Novel bellows structure suitable for big bellows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220755573.5U CN217635730U (en) | 2022-03-31 | 2022-03-31 | Novel bellows structure suitable for big bellows |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217635730U true CN217635730U (en) | 2022-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220755573.5U Active CN217635730U (en) | 2022-03-31 | 2022-03-31 | Novel bellows structure suitable for big bellows |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217635730U (en) |
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2022
- 2022-03-31 CN CN202220755573.5U patent/CN217635730U/en active Active
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