CN208169207U - Flue guiding device - Google Patents

Abstract

This patent belongs to air-introduced machine technical field, specifically discloses flue guiding device, including sequentially connected boiler, air-introduced machine principal part and smoke exhaust mechanism；Air-introduced machine principal part includes sequentially connected preceding flue, bend position rear pass and impeller cavity；Smoke exhaust mechanism includes flue one and chimney.Air-introduced machine principal part is equipped with deflector at bend position, reduces secondary flow loss, reduces the vibration of pipeline；Smoke exhaust mechanism is equipped with balance plate in the connecting portion of flue one and chimney, slows down air-flow to the impact force of equipment, reduces the damage frequency of equipment.

Description

Flue guiding device

Technical field

The utility model relates to air-introduced machine technical fields, and in particular to fluid rectification before and after air-introduced machine.

Background technique

Air-introduced machine is negative pressure to be generated by wheel rotation, and then a kind of equipment of air is extracted from system (equipment), generally It is mounted on boiler tail end, for extracting the hot fume in burner hearth.

In daily life, ventilation blower is usually divided into air-introduced machine (negative pressure use) and drum by positive and negative pressure usage mode difference Blower (positive pressure use).

Air-introduced machine is widely used in the ventilation of factory, mine, tunnel, cooling tower, vehicle, ship and building, dust discharge and cold But；The ventilation of boiler and industrial furnace and air inducing；Cooling and ventilation in the apparatus of air conditioning and domestic electric appliance；Cereal It dries and selects and recommends；Inflation and propulsion of wind-tunnel wind regime and aircushion vehicle etc..

Blower is mainly used in the techniques such as desulphurization denitration in the factory.Application number 201711493883.4, publication No. The patent document of CN107890884 A discloses a kind of SCR catalyst situ regeneration device applied to consumer waste incineration.It should Device includes biogas blower, secondary air fan, and two Fans play the role of drainage to the flue gas in device.

But the device does not design the inlet and outlet flue gas drainage of air-introduced machine, is certainly existing in pipeline during normal production Local losses, scene performance are exactly that pipeline concussion sound is big, serious to the damage of fan blade.

Utility model content

The purpose of this utility model is to provide a kind of reduction flue concussion, mitigate leading for the fan blade extent of damage Flow device.

In order to achieve the above objectives, the utility model provides flue guiding device, including boiler, air-introduced machine principal part and induced-draft fan Structure, the air-introduced machine principal part include sequentially connected preceding flue, bend position, rear pass and impeller cavity, are set in the impeller cavity It is equipped with impeller；The smoke exhaust mechanism includes sequentially connected flue one and chimney；The flue one, institute are connected after the impeller cavity It states bend position inner wall and is fixedly installed deflector, the deflector and the side wall at the bend position have the common circle of curvature The heart and central angle is identical；The bottom of the chimney is equipped with balance cylinder, and the top of the balance cylinder is equipped with balance plate, the balance plate Edge it is tangent with the side wall of the flue one and the chimney respectively, the balance plate be equipped with balance hole.

The principles of the present invention are：The deflector separates the bend position, forms cross section diameter ruler Very little smaller bend space.The radius of curvature dimensions in the bend space and the ratio of cross section diameter size increase, when flue gas passes through When the preceding flue flows through the bend position,

Secondary flow loss reduces.The setting of the balance hole can slow down air-flow to the impact strength of the balance plate.

The beneficial effects of the utility model are：After secondary flow loss reduces, the air flow method behind bend position is more Uniformly, gas pressure intensity suffered by rear pass side wall is more balanced, and the shock range of the rear pass is with regard to smaller, when uniform It is also relatively uniform to the impact force intensity of the impeller unit area when air-flow flows through the impeller, the impaired frequency of the impeller Rate is lower.Impact strength suffered by the balance plate reduces, and the frequency of damage can also reduce.

Scheme two, this is the preferred of basic scheme, and the deflector is set as the first deflector, the second deflector, third Deflector, the 4th deflector, first deflector, the second deflector, third deflector, the 4th deflector curvature circle-center weight Conjunction, curvature circle-center angle are also identical.

The principle and beneficial effect of this programme are：Four pieces of deflectors are set, brought by secondary flow loss reduction degree The reduction of pipe vibration amplitude has met the rear pass fixing intensity.

Scheme three, this is the preferred of basic scheme, and the balance hole is set as two rows of, and two rows of balance holes are about described The center line of balance plate is symmetrical.

The principle and beneficial effect of this programme are：Air-flow, can be at the balance plate center when reaching the balance plate Two lateral balance of line discharges pressure, has certain protection to the structural strength of the balance plate.

Scheme four, this is the preferred of basic scheme, and the lower section of the flue one is provided with balance pipe, the balance pipe One end is connected to the side wall of the flue one, and the other end of the balance pipe is connected to the side wall of the balance cylinder, the balance The diameter of section of pipe having a size of one diameter dimension of flue 1/10th.

The principle and beneficial effect of this programme are：The most of of air-flow enters the chimney, small portion through the flue one Air-flow is divided to enter the balance cylinder through the balance pipe, two strands of air-flows cancel each other out at the balance hole, reduce described flat Weigh gas pressure intensity suffered by plate.

Scheme five, this is preferred for scheme four, and loading plate is provided with below the edge of the balance plate, and the loading plate is solid It is arranged on the inner sidewall of the chimney calmly.

The principle and beneficial effect of this programme are：When the balance plate is used for a long time, damage, which cannot seriously use, to be needed When replacement, the balance plate can be removed from the loading plate.

Scheme six, this is the preferred of basic scheme, is provided with manhole on balance cylinder's side wall.The principle of this programme and have Beneficial effect is：By long-term use, take advantage of the occasion in the balance cylinder a large amount of cigarette ashes when, the openable manhole, carry out deashing operation.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model flue guiding device；

Fig. 2 is the structural schematic diagram of the utility model flue guiding device air-introduced machine principal part；

Fig. 3 is the structural schematic diagram of the utility model flue guiding device smoke exhaust mechanism；

Fig. 4 is the expanded view of the utility model flue guiding device balance plate.

Specific embodiment

The utility model is described in further detail below by specific embodiment：

Appended drawing reference in Figure of description includes：Boiler 1, air-introduced machine principal part A, smoke exhaust mechanism B, the first deflector 101, Second deflector 102, third deflector 103, the 4th deflector 104, impeller 105, rear pass 106, preceding flue 107, impeller cavity 108, bend space 109, flue 1, balance pipe 202, balance cylinder 203, manhole 204, chimney 205, balance plate 3, balance hole 301, loading plate 302.

Embodiment

As shown in Figure 1：Flue guiding device includes boiler 1, air-introduced machine principal part A and smoke exhaust mechanism B.

As shown in Figure 2：Air-introduced machine principal part A includes sequentially connected preceding flue 107, diversion division, rear pass 106, impeller cavity 108；Diversion division includes arc-shaped first deflector 101, the second deflector 102, third deflector 103, in the common curvature center of circle Four deflectors 104, the interior rotation of impeller cavity 108 are provided with impeller 105, and preceding flue 107 is connected with boiler 1.

As shown in Figure 3：Smoke exhaust mechanism B includes sequentially connected flue 1, chimney 205, and 205 lower part of chimney is equipped with flat Weighing apparatus room 203, is equipped with balance plate 3 between balance cylinder 203 and chimney 205.The shape of balance plate 3 is rendered as outside the curvature of 90 degree of elbows Part is enclosed, the edge lower part of balance plate 3 is equipped with loading plate 302, and loading plate 302 is fixed on the inner wall of chimney 205.In cigarette The lower end in road 1 is connected with balance pipe 202, and the other end of balance pipe 202 is connected on the lateral wall of balance cylinder 203, balance The diameter dimension of pipe 202 is 1/10th of one 201 diameter dimension of flue.

As shown in Figure 4：Balance plate 3 is in Leaves'Shape after being unfolded, and the middle part of balance plate 3 is equipped with two rows of balance holes 301.

When the flue gas in boiler 1 is as when the bend position where preceding flue 107 flows through diversion division, the curvature at bend position is partly The ratio of diameter size and cross dimensions determines the size of secondary flow loss.Compared to being not provided with diversion division, the section at bend position Size is with regard to bigger, and with regard to smaller, secondary flow loss just compares for the radius of curvature dimensions at bend position and the ratio of cross dimensions Seriously.And it is present, diversion division is by the first deflector 101, the second deflector 102, third deflector 103,104 and of the 4th deflector Diversion division inner wall is partitioned into five independent bend spaces 109, this is equivalent to the cross dimensions at five equal parts bend position, Five bend spaces 109 generate secondary flow loss respectively, and the ratio of the radius of curvature and cross dimensions that calculate separately out can become larger, And secondary flow loss will become smaller, and after passing through bend position which reduces air-flow, influence of the stream pressure unevenness to pipeline, The shock range of rear pass 106 is alleviated, while when air-flow reaches impeller 105, also reducing gas pressure on unit cross-sectional area Strong difference, so that the problem of reducing 105 unbalance stress of impeller, reduces the damage frequency of impeller 105.

When air-flow is after impeller cavity 108 enters flue 1, also to pass through balance plate 3 just can enter 205 ability of chimney It is vented to atmosphere.Because air-flow at this moment is accelerated by impeller 105, air velocity quickly, the impact to balance plate 3 Power is bigger, so the setting of balance pipe 202 and balance hole 301 can reduce the pressure of about 3 balance plate to a certain extent It is strong poor, also reduce the probability of the damage of balance plate 3.But through a long time has consolidating for whereabouts using meeting deposition in balance cylinder 203 Body cigarette ash can open manhole 204 and remove cigarette ash.Through a long time uses, and balance plate 3 still can be by flue gas institute corrosion and damage, institute Replacement can be removed from bearing plate 302 with balance plate 3.

Above-described is only the embodiments of the present invention, and the common sense such as well known specific structure and characteristic are herein in scheme It does not describe excessively.It should be pointed out that for those skilled in the art, in the premise for not departing from the utility model structure Under, several modifications and improvements can also be made, these also should be considered as the protection scope of the utility model, these all will not influence The effect and patent practicability that the utility model is implemented.This application claims protection scope should be with the content of its claim Subject to, the records such as specific embodiment in specification can be used for explaining the content of claim.

Claims (6)

1. flue guiding device, including boiler, air-introduced machine principal part and smoke exhaust mechanism, the air-introduced machine principal part includes sequentially connected Preceding flue, bend position, rear pass and impeller cavity are provided with impeller in the impeller cavity；The smoke exhaust mechanism includes successively connecting The flue one and chimney connect；The flue one is connected after the impeller cavity, it is characterised in that：Inner wall fixation in the bend position is set It is equipped with deflector, the deflector has common curvature circle-center and central angle identical with the side wall at the bend position；It is described The bottom of chimney is equipped with balance cylinder, and the top of the balance cylinder is equipped with balance plate, the edge of the balance plate respectively with the cigarette The side wall of road one and the chimney is tangent, and the balance plate is equipped with balance hole.

2. flue guiding device according to claim 1, it is characterised in that：The deflector includes the first deflector, the Two deflectors, third deflector, the 4th deflector, first deflector, the second deflector, third deflector, the 4th water conservancy diversion The curvature circle-center of plate is overlapped, curvature circle-center angle is also identical.

3. flue guiding device according to claim 1, it is characterised in that：The balance hole is set as two rows of, Liang Paisuo The center line that balance hole is stated about the balance plate is symmetrical.

4. flue guiding device according to claim 1, it is characterised in that：The lower section of the flue one is provided with balance Pipe, one end of the balance pipe are connected to the side wall of the flue one, the side of the other end of the balance pipe and the balance cylinder Wall connection, the diameter of section of the balance pipe is having a size of 1/10th of one diameter dimension of flue.

5. flue guiding device according to claim 1, it is characterised in that：It is provided with and holds below the edge of the balance plate Support plate, the loading plate are fixed on the inner sidewall of the chimney.

6. flue guiding device according to claim 1, it is characterised in that：Manhole is provided on balance cylinder's side wall.