CN216768748U

CN216768748U - Pressure reduction structure of ventilation pipeline

Info

Publication number: CN216768748U
Application number: CN202123268163.2U
Authority: CN
Inventors: 杨彩云; 林镇荣; 尹华; 郭华芳; 李家杰
Original assignee: Guangzhou Institute of Energy Conversion of CAS
Current assignee: Guangzhou Institute of Energy Conversion of CAS
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-06-17
Anticipated expiration: 2031-12-23

Abstract

The utility model discloses a pressure reduction structure of a ventilation pipeline, wherein a guide plate assembly is arranged in the ventilation pipeline and comprises a plurality of guide plates parallel to the direction of a flow channel, and the plurality of guide plates are arranged in a cross mode to divide the internal structure of the ventilation pipeline into multiple channels from a single channel. The utility model divides the air flow in the pipeline into a plurality of channels from a single channel instantly through the guide plate component, balances the pressure among the channels through the pressure relief holes on the guide plate, reduces the impact force of the air flow on the inner wall surface of the vulnerable area of the air pipeline in a shunting way, prevents the vulnerable area of the air pipeline from frequently generating the phenomena of protrusion, dent, damage, leakage and the like in the long-time operation process, has simple structure, convenient installation and low cost, can be flexibly applied to large air volume in various shapes and structures, reduces the pressure of the vulnerable area of the long-distance conveying pipeline, and can prolong the service life of the air pipeline and the maintenance period of the pipeline.

Description

Pressure reduction structure of ventilation pipeline

Technical Field

The utility model relates to a ventilating duct, in particular to a ventilating duct pressure reduction structure in the papermaking industry.

Background

The ventilating duct has wide application in the manufacturing industry and is mainly used for conveying fluid media such as waste heat steam, fresh air and the like. Fluid media, such as high temperature, high pressure, high humidity, etc., are sometimes carried due to the demands of the work environment. In the prior art, a pressure reducing valve or a buffer tank is usually adopted in the pressure reduction method inside a pressure-bearing pipeline, the pressure loss in the pipeline is improved or the flow area is increased by increasing the local resistance in the pipeline, the pressure reduction effect is achieved by adopting an energy conversion mode, the limitation is that pressure reduction components or operation space are additionally required to be added, the installation is also complex, and the equipment cost and the equipment operation failure rate are relatively high.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the background art, the utility model provides a pressure reduction structure of a ventilation pipeline, which reduces the impact force of high-pressure and high-speed airflow in the pipeline on the inner wall surface of the pipeline in a shunting manner, prevents the phenomena of protrusion, depression, damage, leakage and the like frequently occurring in the vulnerable area of the ventilation pipeline in the long-time operation process, and prolongs the service life of the ventilation pipeline and the maintenance cycle of the pipeline.

In order to achieve the purpose, the utility model adopts the technical scheme that:

the utility model provides a ventilation pipe step-down structure, ventilation pipe's internally mounted has the guide plate subassembly, and this guide plate subassembly includes the guide plate of a plurality of parallel flow channel directions, and a plurality of guide plate cross arrangement separate the ventilation pipe inner structure for the multichannel by the single channel.

As an improvement of the utility model, the guide plate is provided with a plurality of pressure relief holes for balancing the pressure of multiple channels, so that the pressure among the multiple channels is balanced, and the guide plate structure is prevented from deforming due to unbalanced stress.

As an improvement of the utility model, the outer wall surface of the ventilating duct is provided with reinforcing ribs distributed annularly at intervals, and the purpose is to fix the outer wall surface of the air duct and prevent the deformation of the duct wall caused by the impact of high-pressure and high-speed airflow in the duct.

As an improvement of the utility model, the inner wall surface of the ventilating duct is provided with a sheet metal strip for fixing the guide plate, and the sheet metal strip is provided with a mounting hole for mounting the guide plate.

As an improvement of the utility model, the edge of the guide plate is provided with a guide plate mounting and fixing hole which can be detachably connected with a sheet metal strip of the ventilation pipeline in a bolt mode and the like, so that the later maintenance is facilitated.

As an improvement of the utility model, the deflector assembly is mounted in a vulnerable area of the ventilation duct.

Compared with the prior art, the utility model has the advantages that:

1. according to the utility model, the guide plate assembly is arranged in the vulnerable area of the ventilation pipeline, when high-pressure and high-speed airflow in the ventilation pipeline passes through the vulnerable area of the pipeline, the airflow is instantly divided into a plurality of channels from a single channel under the action of the guide plate, the pressure among the channels is balanced through the pressure relief holes in the guide plate, the impact force of the airflow on the inner wall surface of the vulnerable area of the ventilation pipeline is reduced in a shunting manner, and the phenomena of protrusion, depression, damage, leakage and the like frequently occurring in the vulnerable area of the ventilation pipeline in the long-time operation process are prevented.

2. The utility model forms double-layer reinforcement by the built-in guide plate structure which is flexibly assembled and disassembled and the reinforcing ribs which are endowed on the outer wall surface of the pipeline, and can prevent the phenomena of protrusion, depression and the like on the pipeline wall surface of the vulnerable area of the ventilating pipeline to the greatest extent.

3. The pressure reducing structure of the ventilating duct has the advantages of simple structure, convenience in installation and low cost, can be flexibly applied to large air volume of various shapes and structures, reduces the pressure of a vulnerable area of a long-distance conveying duct, and can prolong the service life of the ventilating duct and the maintenance cycle of the duct.

Drawings

Fig. 1 is a schematic view of an overall structure in which a baffle assembly of one embodiment is installed in a ventilation duct;

fig. 2 is a schematic structural view of a sheet metal strip in a ventilation duct according to an embodiment;

FIG. 3 is a schematic diagram of a baffle assembly according to one embodiment;

FIG. 4 is a schematic structural diagram of a first baffle of one embodiment;

fig. 5 is a schematic structural diagram of a second baffle of one embodiment;

description of reference numerals:

1-ventilating duct; 11-sheet metal strip; 12-mounting holes; 13-reinforcing ribs;

2-a guide plate assembly; 21-a first flow guide plate; 22-a second guide plate; 23-a third guide plate; 24-a fourth baffle; 25-a fifth guide plate; 26-baffle six; 27-pressure relief holes; 28-installing the fixing hole.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description.

The utility model provides a ventilation pipe step-down structure, include ventilation pipe and install the guide plate subassembly in the vulnerable regional inside of ventilation pipe, the guide plate subassembly includes the guide plate of a plurality of parallel flow way directions, and a plurality of guide plate cross arrangement separate the single channel that ventilation pipe inner structure was by for the multichannel.

So, when high pressure, high-speed air current when the pipeline is vulnerable to the region in the air pipe, because the effect of guide plate divide into a plurality of passageways by the single channel with the air current in the twinkling of an eye to pressure between a plurality of passageways is balanced through the pressure release hole on the guide plate, reduce the impact force of air current to the vulnerable regional internal face of air pipe through the mode of reposition of redundant personnel, prevent among the long-time operation process that the vulnerable region of air pipe frequently appears phenomenons such as arch, sunken, damage, reveal.

The vulnerable area of the ventilation pipeline is determined according to actual conditions and at least comprises a corner area of the ventilation pipeline and a middle section area of a long straight line section of the ventilation pipeline.

Therefore, the shape of the guide plates can be specifically designed according to the installation position, the number of the guide plates is determined according to the number of the channels to be divided, the connection between the guide plates and the pipeline can adopt fixed connection modes such as welding and the like, can also adopt detachable connection modes such as bolts, rivets and the like, and can be specifically determined according to maintenance requirements.

The following describes in detail the design of the pressure reducing structure of the ventilation duct according to the present application with specific embodiments.

As shown in fig. 1 and 2, a pressure reducing structure of a ventilation duct mainly comprises a ventilation duct 1 and a baffle assembly 2 installed at a corner area of the ventilation duct 1.

Be equipped with the panel beating strip 11 that is used for fixed guide plate in ventilation pipe 1, be equipped with the mounting hole 12 that is used for installing the guide plate on the panel beating strip 11, fix the guide plate on ventilation pipe 1 through mounting hole 12. The outside of the ventilation pipeline 1 is provided with the reinforcing ribs 13 which are distributed in an equally-spaced annular mode, and the outer wall surface of the ventilation pipeline 1 is fixed through the reinforcing ribs 13, so that the outer wall surface of the pipeline is prevented from deforming under the impact action of high-pressure and high-speed airflow in the pipeline.

As shown in fig. 3 to 5, the deflector assembly 2 is mounted in two adjacent corner areas of the ventilation duct 1, one corner being a 90 ° corner of the XY plane (top surface) and one corner being a 90 ° corner of the YZ plane (front surface). Therefore, the guide plate assembly 2 can be formed by splicing six arc-shaped plates with different shapes and specifications, namely a first guide plate 21, a second guide plate 22, a third guide plate 23, a fourth guide plate 24, a fifth guide plate 25 and a sixth guide plate 26.

The five guide plates 25 and the six guide plates 26 are spliced to form a step-shaped arc-shaped surface, and the ventilating duct 1 is divided into an upper channel and a lower channel; the first guide plate 21 and the third guide plate 23 are spliced to form a step-shaped arc-shaped surface and are connected to the upper surface (which can be welded or connected through sheet metal strips and bolts) of the arc-shaped surface formed by the fifth guide plate 25 and the sixth guide plate 26 to divide the upper channel into a front channel and a rear channel; the second guide plate 22 and the fourth guide plate 24 are spliced to form a step-shaped arc-shaped surface and are connected to the lower surface of the arc-shaped surface formed by the fifth guide plate 25 and the sixth guide plate 26, and the lower channel is divided into a front channel and a rear channel; thereby dividing the inside of the ventilation duct 1 into 4 passages.

All be equipped with the pressure release hole 27 of different quantity on each guide plate, the outside edge is equipped with installation fixed orifices 28 simultaneously, and pressure release hole 27 is mainly used for balancing the pressure between the four passageways, prevents that the unbalanced pressure in the four passageways from leading to guide plate subassembly 2 to take place to warp. The mounting holes 28 are used for matching with the mounting holes 12 on the sheet metal strip 11 on the ventilation duct 1 to fix the deflector assembly 2 inside the ventilation duct 1.

During the use, when high pressure, high-speed air current are in air pipe 1 when the corner at guide plate subassembly 2 place, because the effect of guide plate divide into the quadruple channel with the air current by the single channel in the twinkling of an eye to pressure between the quadruple channel is balanced through pressure release hole 27 on the guide plate, reduce the impact force of air current to the vulnerable regional internal face of air pipe 1 through the mode of reposition of redundant personnel, prevent that the vulnerable region of air pipe frequently appears phenomenons such as arch, sunken, damage, reveal for long-time operation in-process.

In conclusion, the air pipeline pressure reduction structure is simple in structure, convenient to install and low in cost, can be flexibly applied to large air volume of various shapes and structures, reduces pressure of a vulnerable area of a long-distance conveying pipeline, and can prolong the service life of a ventilating pipeline and the maintenance period of the pipeline.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.

Claims

1. The utility model provides a ventilation pipe step-down structure which characterized in that: the internally mounted of air pipe has the guide plate subassembly, and this guide plate subassembly includes the guide plate of a plurality of parallel flow channel directions, and a plurality of guide plates cross arrangement separate air pipe inner structure for the multichannel by the single channel.

2. A ventilation duct depressurization structure according to claim 1, wherein: the guide plate is provided with a plurality of pressure relief holes for balancing the pressure of the multiple channels.

3. A ventilation duct depressurization structure according to claim 1, wherein: the outer wall surface of the ventilation pipeline is provided with reinforcing ribs distributed annularly at intervals.

4. A ventilation duct depressurization structure according to claim 1, wherein: the inner wall surface of the ventilation pipeline is provided with a sheet metal strip for fixing the guide plate, and the sheet metal strip is provided with a mounting hole for mounting the guide plate.

5. A ventilation duct depressurization structure according to claim 1, characterized in that: and the edge of the guide plate is provided with a guide plate mounting and fixing hole.

6. A ventilation duct depressurization structure according to claim 1, wherein: the guide plate assembly is arranged in a vulnerable area of the ventilation pipeline.