CN215256526U

CN215256526U - Filter screen with flow equalizing function

Info

Publication number: CN215256526U
Application number: CN202121281823.8U
Authority: CN
Inventors: 杨强; 杨汉卿; 毛嘉豪
Original assignee: Zhongche Tianjin Rail Transit Equipment Co ltd
Current assignee: Tianjin Zhongxin Rail Transit Equipment Co ltd
Priority date: 2021-06-08
Filing date: 2021-06-08
Publication date: 2021-12-21
Anticipated expiration: 2031-06-08

Abstract

The utility model provides a filter screen with flow equalizing function, a plurality of groups that are separated into by the baffle and arrange side by side are used for separating air impurity's air filter, air intake and air outlet are constituted at air filter's both ends, the air that flows gets into by the air intake, filter via air filter, clean air is discharged through the air outlet, every air filter of group deviates from air intake one end and all is equipped with a current equalizer, the current equalizer sets up the tubular structure that has collection dirt passageway at the middle part, collection dirt passageway passes through the baffle and separates for first passageway and second passageway, the opening has been seted up to the baffle, first passageway passes through opening and second passageway intercommunication, second passageway both ends form the dust exhaust export, the current equalizer deviates from one side symmetry of first passageway and has laid the water conservancy diversion transition portion that is used for drawing the ash. The utility model discloses can make the air current that carries the dust get into the first balanced air current of collection dirt passageway from the dust exhaust passageway and arrange to the atmosphere again, help the even reposition of redundant personnel of air current, require no longer strictly to the amount of wind of integrated fan.

Description

Filter screen with flow equalizing function

Technical Field

The utility model relates to an air filtration technical field, concretely relates to filter screen with function of flow equalizing.

Background

In the current society, rail transportation means mainly comprise transportation carriers such as diesel locomotives, electric locomotives, motor train units, high-speed rails, carriages of passenger cars and trucks, light rails, subways and the like, and road transportation means mainly comprise automobiles. Their normal operation requires the intake of a large amount of air to meet the requirements of combustion of the internal combustion engine, heat dissipation of electronic and mechanical components, and cooling of air conditioning and other facilities. Along with the suction of a large amount of air, a large amount of impurities such as sand, catkin, plant leaves, paper scraps, plastics and the like exist in the air, the impurities can cause abrasion to an internal combustion engine and the like, the service life of the internal combustion engine is shortened, and a dust removal device is usually arranged on an air supply channel of equipment in order to prevent the impurities from entering the equipment.

Dust collector mainly plays the effect with impurity air separation, and then obtains clean air, filter great particulate matter impurity, play certain dust removal effect, but can't detach the tiny dust of tiny particle or the less impurity of proportion (especially plant piece, catkin, flotage such as poplar wadding), especially in the season that floats heavy or the feather wadding is more, a large amount of flocculent impurities get into, easily make the filter screen block, reduce air filter's life, dust collection efficiency is lower, the demand of removing dust when can not satisfy big ventilation volume.

The dust exhaust export of current dust collector's dust exhaust passageway often the lug connection fan or link to each other with the fan through the pipeline and then take the dust out through the suction of fan, however dust impurity piles up near the dust exhaust passageway easily, the dust is released from the dust exhaust passageway and is needed great thrust, it can comparatively thoroughly be released to need the fan to guarantee that the volume of airing exhaust is big just can be close to the dust of fan, the dust of keeping away from the fan then remains on dust collector easily, this dust adhesion that caused dust collector in the past easily piles up the dust exhaust export at the dust exhaust passageway in the long term, cause the jam of dust exhaust export even, seriously influence dust collector's dust removal effect and use. When meeting moist external environment such as rainwater, dew, moisture gets into dust collector, and the dust layer on device surface meets water and can become mud, and is more serious to the jam of dust exhaust passageway.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims to solve the problem of providing a filter screen with the function of flow equalizing.

In order to solve the technical problem, the utility model discloses a technical scheme is: a filter screen with flow equalizing function comprises a plurality of groups of air filter elements which are arranged in parallel and separated by partition boards, the two ends of the air filter element form an air inlet and an air outlet, flowing air enters from the air inlet, the clean air is discharged through the air outlet after being filtered by the air filter elements, one end of each group of the air filter elements, which is far away from the air inlet, is provided with a flow equalizer, the flow equalizer is arranged in a tubular structure with a dust collecting channel in the middle, the dust collecting channel is divided into a first channel and a second channel by a baffle plate, the baffle is provided with an opening, the first channel is communicated with the second channel through the opening, a dust exhaust outlet is formed at two ends of the second channel and used for exhausting air containing impurities, and one side of the flow equalizer, which is far away from the first channel, is symmetrically provided with a flow guide transition part for guiding ash.

In the present invention, preferably, the first channel is provided with a groove corresponding to the first channel, and the width of the groove is greater than the width of the opening.

In the present invention, preferably, a flow dividing column is provided in the second channel, and the flow dividing column is disposed opposite to the opening.

In the present invention, preferably, the interval of the flow guide transition portion is smaller than the radial dimension of the second passage.

In the present invention, preferably, the flow guide transition portion has an airfoil-shaped dust collecting surface, and the airfoil-shaped dust collecting surface is shaped to be convex.

The utility model discloses in, preferably, air filter includes two guide plates that the structure is the same and the symmetry sets up, two interval between guide plate and the baffle is crescent to air outlet one side by the air intake.

The utility model discloses in, preferably, two form the dust exhaust passageway between the guide plate, every the guide plate with form the passageway of airing exhaust between the baffle, the guide plate includes a plurality of parallel and interval arrangement's water conservancy diversion piece, and is adjacent form the water conservancy diversion passageway between the water conservancy diversion piece, clean air is followed the water conservancy diversion passageway gets into the passageway of airing exhaust.

The utility model discloses in, preferably, the vertical cross-section of water conservancy diversion piece is wing, the water conservancy diversion piece includes the flow guide surface of outer convex and the water conservancy diversion face of level and smooth setting.

In the present invention, preferably, the vertical cross section of the baffle is rectangular, polygonal or arc.

The utility model discloses in, preferably, be close to air intake one side be equipped with a plurality of choked flow strips that are used for providing the resistance for the air current on the baffle, choked flow strip sets up to protruding piece.

The utility model has the advantages and positive effects that:

(1) through the mutual matching among the air filter elements, the partition plates and the flow equalizers, the partition plates are divided into a plurality of groups of air filter elements which are arranged in parallel and used for separating air impurities, one end of each group of air filter elements, which is far away from the air inlet, is provided with the flow equalizers, so that the dust removal work can be realized while the plurality of groups of air filter elements are installed side by side, the dust removal efficiency is improved, and the requirement of air filtration in large ventilation volume is met; through setting up the current equalizer, can make the air current that carries the dust get into the dust collecting channel from the dust exhaust passageway and balance the air current earlier and arrange to the atmosphere again, help the even reposition of redundant personnel of air current, no longer harsh to the amount of wind requirement of integrated fan.

(2) The flow equalizer is arranged into a tubular structure with a dust collecting channel in the middle, the inner space of the flow equalizer is divided into a first channel and a second channel which are convenient for air flow equalization through a baffle plate, an opening for communicating the first channel with the second channel is arranged on the baffle plate, one side of the flow equalizer, which is far away from the first channel, is symmetrically provided with a flow guide transition part for guiding dust in a dust exhaust channel to the dust collecting channel, through the mutual matching among the dust collecting channel, the baffle plate and the opening, the airflow carrying dust enters the dust collecting channel from the dust exhaust channel, the airflow is firstly balanced and then exhausted to the atmosphere, the thrust required by pushing the airflow in the dust collecting channel is reduced, the requirement on the air quantity of the integrated fan is not strict any more, and the uniform distribution of air flow is facilitated, so that dust is conveniently discharged to a dust discharge outlet through a dust collection channel, and the problems that the dust discharge outlet is easily caused and the dust discharge channel is seriously blocked after long-term use are solved.

(3) Because the first channel is provided with the groove, the space area formed by the groove and the first channel is larger than that of the first channel, namely, the sectional area of the dust from the second channel when reaching the first channel through the opening is larger, namely, the first channel is of a tightening structure from the groove to the direction of the dust exhaust outlet, the sectional area of the channel is reduced along with the process that the dust continues to move to the dust exhaust outlet along the first channel, the pressure for discharging the dust is reduced, the dust is favorably discharged smoothly, and the dust is discharged back to the atmosphere more thoroughly and cleanly.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of an overall structure of a filter screen with a flow equalizing function according to the present invention;

fig. 2 is a schematic front view of a filter screen with a flow equalizing function according to the present invention;

fig. 3 is a perspective view of a filter screen flow equalizer with flow equalizing function of the present invention;

fig. 4 is a schematic structural view of a flow equalizer of a filter screen with flow equalizing function according to the present invention;

fig. 5 is a top sectional view of a flow equalizer of a filter screen with flow equalizing function according to the present invention;

fig. 6 is a front sectional view of a flow equalizer of a filter screen with flow equalizing function according to the present invention;

fig. 7 is a schematic view of the operation principle of a flow equalizer of a filter screen with flow equalizing function of the present invention;

fig. 8 is a schematic structural view of a flow deflector of a filter screen with flow equalization function of the present invention.

In the figure: 1. a current equalizer; 100. a dust collecting passage; 101. a first channel; 102. a second channel; 103. a baffle plate; 104. an opening; 105. a dust exhaust outlet; 106. a flow guide transition part; 107. a groove; 108. a flow-dividing column; 109. a wing-shaped dust collecting surface; 2. an air inlet; 3. an air filter element; 30. a baffle; 300. a flow deflector; 300-1, a drainage surface; 300-2, a flow guide surface; 5. a dust exhaust channel; 6. an air exhaust channel; 10. a flow guide channel; 11. an air outlet; 13. a partition plate; 15. a flow-blocking strip.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, fig. 2 and fig. 3, the present invention provides a filter screen with flow equalizing function, which comprises a plurality of groups of air filter elements 3 separated by a partition 13 and arranged side by side for separating air impurities, so that the arrangement can realize the parallel installation of a plurality of groups of air filter elements 3 and the simultaneous dust removal, thereby improving the dust removal efficiency and meeting the requirement of air filtration in large ventilation volume, wherein both ends of the air filter elements 3 form an air inlet 2 and an air outlet 11, flowing air enters from the air inlet 2 and is filtered by the air filter elements 3, clean air is discharged through the air outlet 11, one end of each group of the air filter elements 3, which is far away from the air inlet 2, is provided with a flow equalizer 1, the flow equalizer 1 is arranged in a tubular structure with a dust collecting channel 100 at the middle part, the dust collecting channel 100 is separated into a first channel 101 and a second channel 102 by a baffle 103, the baffle 103 is provided with an opening 104, the first channel 101 is communicated with the second channel 102 through the opening 104, dust discharge outlets 105 are formed at two ends of the second channel 102, the dust discharge outlets 105 are used for discharging air containing impurities, and flow guide transition parts 106 used for guiding dust are symmetrically distributed on one side of the flow equalizer 1 departing from the first channel 101.

As shown in fig. 4, in the present embodiment, a groove 107 is further opened at a position of the first channel 101 opposite to the first channel 101, and a width dimension of the groove 107 is greater than a width dimension of the opening 104. The space area formed by the groove 107 and the first channel 101 is larger than that of the first channel 101, that is, the sectional area of the dust from the second channel 102 reaching the first channel 101 through the opening 104 is larger, that is, the first channel 101 is in a tightening structure from the groove 107 to the dust exhaust outlet 105, and as the sectional area of the channel becomes smaller in the process that the dust continues to move along the first channel 101 to the dust exhaust outlet 105, the pressure required for discharging the dust also becomes smaller, which is helpful for discharging the dust smoothly, so that the dust is discharged back to the atmosphere more thoroughly and cleanly, and the problems that dust exhaust dead corners are easy to occur and the dust exhaust outlet 105 is blocked seriously are further solved. The dust exhaust outlet 105 is externally connected with a dust collection fan, the dust collection fan and the dust exhaust outlet 105 can be connected in a direct connection mode, the dust exhaust pipe can also be connected with the dust exhaust outlet 105, the dust of the dust exhaust outlet 105 can generate thrust through the flow equalizing process of the flow equalizer 1, and the problem that the suction force of the traditional dust collection fan is insufficient, and the dust is difficult to be thoroughly discharged to the atmosphere is solved.

As shown in fig. 5 and 6, in the present embodiment, further, a splitter column 108 is disposed in the second channel 102, and the splitter column 108 is disposed opposite to the position of the opening 104. Because the airflow near the opening 104 is large, by arranging the splitter column 108 in the second passage 102, the airflow in the first passage 101 reaching the splitter column 108 will overflow along the outer wall of the splitter column 108 to both sides, so that the airflow around the opening 104 is balanced. The split flow column 108 is arranged to be a cylindrical tube, the outer edge of the cylindrical tube is arc-shaped, air flow near the opening 104 can be well balanced, the air flow smoothly enters the second channel 102 and overflows to two sides, dust can be discharged smoothly, the whole weight of the flow equalizer 1 can be reduced due to the arrangement of the hollow cylindrical tube, and the flow equalizer 1 is light and convenient.

In this embodiment, further, the distance between the flow guiding transition portions 106 is smaller than the radial dimension of the second channel 102, so that the arrangement can ensure that the dust exhaust channel is communicated with the dust collecting channel 100 through the first channel 101, and dust can be guided to the first channel 101 through the dust exhaust channel first, thereby facilitating the subsequent flow equalizing process.

In the present embodiment, further, the flow guiding transition portion 106 has an airfoil shaped dust collecting surface 109, and the airfoil shaped dust collecting surface 109 is configured to be convex. Wing section collection dirt face 109 is used for pushing away the dust to collection dirt passageway 100 from dust exhaust passageway 5, set up wing section collection dirt face 109's shape into the evagination, this is because wind can be at the local vortex that produces of collection dirt face when the collection dirt face of concave structure is gone through to wind, block and change the flow direction of wind, be unfavorable for collection dirt to the water conservancy diversion effect of air current, the wing section collection dirt face 109 that adopts the evagination can cut down the vortex influence that brings when leading water conservancy diversion transition portion 106, improve the water conservancy diversion effect of accelerating wing section collection dirt face 109, be convenient for smoothly carry the air current of dust to flow equalize and the discharge of dust in collecting passageway 100 fast.

In this embodiment, further, the air filter element 3 includes two symmetrically disposed baffles 30 with the same structure, and a distance between the two baffles 30 and the partition board is gradually increased from the air inlet 2 to the air outlet 11 side. This scheme adopts the guide plate 30 that two symmetries set up, and the both sides and the 14 inner walls contact of installation cavity of this guide plate 30 can not only make guide plate 30 both sides receive the holding power, make it connect stably, can prevent the air current dispersion simultaneously, make the air current flow along predetermined passageway. And the interval between two guide plates 30 and the 14 lateral walls of installation cavity is by air intake 2 to air outlet 11 one side crescent, because the air gets into from air intake 2, the air flow rate of air intake 2 is great relatively, the atmosphere is along the inside dust exhaust passageway 5 flow in-process of air filter 3, the gas flow velocity can reduce, this scheme is through making the air flow along the dust exhaust passageway 5 in the air filter 3 that narrows down gradually, and then the velocity of flow can not obviously descend, thereby the speed that the air flows has been increased, the dust collection efficiency has been improved.

In this embodiment, further, two dust exhaust channels 5 are formed between the two guide plates 30, each guide plate 30 and the partition 13 forms an exhaust channel 6 therebetween, each guide plate 30 includes a plurality of guide plates 300 arranged in parallel and at intervals, a guide channel 10 is formed between adjacent guide plates 300, clean air enters the exhaust channel 6 along the guide channel 10, the air enters from the air inlet 2 and separates the air containing impurities through the dust exhaust channels 5, the air containing dust impurities is equalized by the equalizer 1, and finally the air is exhausted through the dust exhaust outlet 105. The air in the flow guide channel 10 flows obliquely backwards relative to the air in the dust exhaust channel 5, so that a high-pressure area with a pressure greater than that of the central part of the air flow of the dust exhaust channel 5 is formed at the joint of the flow guide channel 10 and the dust exhaust channel 5, the high-pressure area can push the light impurities (such as floccules) wrapped in the air flow of the dust exhaust channel 5 and close to the flow guide channel 10 back to the position of the center of the dust exhaust channel 5, so that the light impurities cannot enter the flow guide channel 10, and the light impurities can continuously move towards the flow equalizer 1 along with the air flow. And if the heavier impurities (such as sand) entrained in the airflow of the dust exhaust channel 5 reach the guide channel 10, the heavier impurities impact the inner wall of the guide channel 10 (namely the surface of the guide vane 300), are ejected back to the center of the dust exhaust channel 5, and keep moving towards the direction of the flow equalizer 1 due to the inertia of the heavier impurities, but do not move towards the guide channel 10 at the oblique rear. In addition, if impurities (such as rainwater) with large moisture are mixed in the airflow of the dust exhaust channel 5 and reach the guide channel 10, the inner wall of the guide channel 10 is atomized and then pushed back to the central position of the dust exhaust channel 5 by the airflow, so that the dust removal effect is further improved, and the impurities cannot enter the exhaust channel 6 along the guide channel 10.

As shown in fig. 8, in the present embodiment, further, the guide vane 300 has a wing-shaped vertical cross section, and the guide vane 300 includes an outer convex-shaped flow guiding surface 300-1 and a smoothly arranged flow guiding surface 300-2. The flow guide surface 300-1 is smoothly and excessively connected with the flow guide surface 300-2, the outward convex flow guide surface 300-1 is a windward surface close to the dust exhaust channel 5, and compared with the plane, the outward convex flow guide surface 300-1 further increases the resistance of airflow, so that impurities are as few as possible close to the flow guide channel 10. Meanwhile, the outward convex flow guide surface 300-1 enables a high pressure area to be formed above the flow guide surface 300-2 more easily, and the high pressure area between two adjacent flow guide surfaces 300-1 has a certain repulsion function, so that impurities are kept on the center line position of the dust exhaust channel 5. Meanwhile, the annular flow deflector 300 enables the impurities to be stressed uniformly without eccentricity, so that the impurities can be better concentrated on the central line of the dust exhaust channel 5.

In this embodiment, further, the vertical cross-section of the baffle 300 is rectangular, polygonal or arc. The axial section of the guide vane 300 is a rectangular, arc or polygonal line shaped surface (not shown), and the guide vane 300 with a regular and smooth shape has a simple processing technology compared with an airfoil-shaped guide vane 300, so that the guide vane 300 is convenient to produce, use and install.

In this embodiment, further, a plurality of flow blocking strips 15 for providing resistance to the airflow are disposed on the partition plate 13 near the air inlet 2, and the flow blocking strips 15 are configured as protruding blocks. When the air current gets into from air intake 2 back, the protruding piece provides certain resistance for the air current to increase the wall pressure of air filter element 3 both sides, make the impurity in the air current especially some flocculus under the effect of wall pressure, flow in the direction of dust exhaust channel 5 central line. The shape of the convex block is not limited too much, and can be trapezoidal, triangular, circular, semicircular or other irregular shapes, and only a certain flow velocity blocking effect can be achieved. In addition, the raised blocks of the present invention can be arranged continuously or at intervals, wherein the continuously arranged raised blocks provide greater resistance than the intermittently arranged raised blocks, and can be arranged according to actual requirements and the size of the device in practical application.

In the present embodiment, the spoiler strips 15 are arranged in a trapezoidal shape, i.e. the cross-section of the bumps is trapezoidal. For the relatively irregular shape, the processing technology of the regular-shaped convex blocks is simpler, and the practicability is stronger. The contact area between the convex block with the rectangular cross section and the air inlet 2 of the air inlet pipe is the largest, so that the air flow is blocked most, and the energy loss of the air flow is also the largest. And the triangular or circular shape has smaller resistance and relatively smaller energy loss. Therefore, as a preferred scheme, the invention selects the convex block with the trapezoidal section, and the trapezoidal inclined plane is opposite to the air inlet 2, so that the higher blocking effect on the air flow is ensured, and the energy loss on the air flow is reduced.

The utility model discloses a theory of operation and working process as follows: the device is arranged on an air vent of a rail transport tool such as a high-speed rail or a motor train unit and is used for filtering impurities in introduced air. When air flow with a certain speed exists in the outside air, the air inlet 2 faces the air flowing direction, so that the outside air enters the air filter element 3 from the air inlet 2. The outside air first enters the dust exhaust channel 5, and impurities are present in the air entering the dust exhaust channel 5. Because each guide plate 30 has a certain inclination angle, a certain resistance is generated to the air flow, so that the flow velocity of the side wall in each air filter element 3 is slow, the wall pressure in the dust exhaust channel 5 is increased, namely, the static pressure is increased, the relative flow velocity of the air flow center position of the dust exhaust channel 5 is fast, and the static pressure is small. Therefore, the impurities such as particles, floccules, water drops and the like entrained by the air flow of the dust exhaust channel 5 will flow along the central line direction of the dust exhaust channel 5 under the action of the wall pressure. And under the action of unequal static pressure, the impurities are easier to approach the direction of the central line of the dust exhaust channel 5, so that the impurities are more favorable to move to the flow equalizer 1 and then are exhausted from the dust exhaust outlet 105.

Meanwhile, in the dust exhaust channel 5, when passing through the position of the diversion channel 10, a part of air enters the diversion channel 10 and flows out of the air exhaust channel 6, and the part of air is clean air. The specific principle is as follows: when the airflow enters the guide passage 10 from the dust exhaust passage 5, part of energy is lost, so that the airflow speed in the guide passage 10 is slower than that in the dust exhaust passage 5. Therefore, when the air flow containing the impurities in the dust exhaust passage 5 approaches the guide passage 10, the attraction force at the guide passage 10 is small, and the inertia of the movement of the impurities cannot be overcome, that is, the air flow speed in the dust exhaust passage 5 is higher than the air flow speed in the guide passage 10, so the impurities cannot enter the guide passage 10, and the clean air and the impurities can be separated by themselves. Wherein, the ratio or difference of the airflow speed in the flow guide channel 10 and the airflow speed in the dust exhaust channel 5 can be adjusted by adjusting the difference of the cross sections of the two channels and adding power sources such as fans and the like at the channel openings.

Therefore, the clean air without impurities can enter the exhaust channel 6 from the flow guide channel 10, and the impurities such as particulate matters, floating matters and the like are collected to the flow equalizer 1 along with the airflow of the dust exhaust channel 5 and then are exhausted from the dust exhaust outlet 105, so that the clean air and the impurities are separated by using the air filter element 3. The integral device is simple in structure and convenient to install, clean air is stably provided through the device, accumulated impurities are prevented from blocking the device, the trouble of manually cleaning the air dust removal device is eliminated, manpower, material resources and financial resources are saved, and long-time normal work under the condition of not cleaning can be guaranteed.

Before use, the flow equalizer is mounted on the dust removing device, so that the flow guiding transition part 106 and the flow guiding plate of the dust removing device are correspondingly arranged, at the moment, the airfoil-shaped dust collecting surface 109 on the flow guiding transition part 106 is along the arc surface of the flow guiding plate, as shown in fig. 7, when the motor train unit runs at high speed, airflow with dust is firstly introduced into the first channel 101 through the dust exhaust channel 5, because the flow equalizer provided with a tubular structure is divided into the first channel 101 and the second channel 102 by the baffle plate 103, the baffle plate 103 is provided with the opening 104 in a penetrating manner, the opening 104 enables the first channel 101 and the second channel 102 to be communicated, the airflow carrying the dust further passes through the opening 104 from the first channel 101 to the second channel 102, because the first channel 101 is provided with the groove 107, the space area formed by the groove 107 and the first channel 101 is larger than the first channel 101, that is to say, the sectional area of the dust from the second channel 102 when the dust reaches the first channel 101 through the opening 104 is larger, that is to say, first passageway 101 is the tightening structure from recess 107 department to the direction of dust exhaust export 105, and along with the dust continues to diminish along the in-process passageway sectional area that first passageway 101 removed to dust exhaust export 105, the pressure that needs the dust exhaust also diminishes, helps the smooth discharge of dust to make the dust discharge back to atmosphere thoroughly clean more, further solved and appeared the dust exhaust dead angle easily, seriously blockked up the problem of dust exhaust export 105.

The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.

Claims

1. The filter screen with the flow equalizing function is characterized by comprising a plurality of groups of air filter elements (3) which are separated by partition plates (13) and are arranged in parallel and used for separating air impurities, wherein the two ends of each air filter element (3) form an air inlet (2) and an air outlet (11), flowing air enters from the air inlets (2) and is filtered by the air filter elements (3), clean air is discharged from the air outlets (11), one end, deviating from the air inlets (2), of each air filter element (3) is provided with a flow equalizer (1), the flow equalizer (1) is set to be of a tubular structure with a dust collecting channel (100) in the middle, the dust collecting channel (100) is separated into a first channel (101) and a second channel (102) through a baffle plate (103), the baffle plate (103) is provided with an opening (104), and the first channel (101) is communicated with the second channel (102) through the opening (104), and dust discharge outlets (105) are formed at two ends of the second channel (102), the dust discharge outlets (105) are used for discharging air containing impurities, and a flow guide transition part (106) for guiding dust is symmetrically distributed on one side of the flow equalizer (1) departing from the first channel (101).

2. The filter screen with flow equalization function according to claim 1, characterized in that the first channel (101) is provided with a groove (107) opposite to the first channel (101), and the width dimension of the groove (107) is larger than the width dimension of the opening (104).

3. The filter screen with flow equalizing function of claim 1, characterized in that a splitter column (108) is arranged in the second channel (102), and the splitter column (108) is arranged opposite to the position of the opening (104).

4. The screen with flow equalization function according to claim 1, characterized in that the distance between the flow guide transitions (106) is smaller than the radial dimension of the second channels (102).

5. The filter screen with flow equalization function according to claim 1, characterized in that the flow guide transition (106) has an airfoil shaped dust collection surface (109), the airfoil shaped dust collection surface (109) being configured as a convex shape.

6. The filter screen with the flow equalizing function according to claim 1, wherein the air filter element (3) comprises two symmetrically arranged guide plates (30) with the same structure, and the distance between the two guide plates (30) and the partition plate (13) is gradually increased from the air inlet (2) to the air outlet (11).

7. The filter screen with flow equalizing function according to claim 6, wherein a dust exhaust channel (5) is formed between two of the flow deflectors (30), an exhaust channel (6) is formed between each of the flow deflectors (30) and the partition plate (13), the flow deflectors (30) comprise a plurality of flow deflectors (300) arranged in parallel and at intervals, a flow guide channel (10) is formed between adjacent flow deflectors (300), and clean air enters the exhaust channel (6) along the flow guide channel (10).

8. The filter screen with flow equalization function of claim 7, wherein the vertical cross section of the guide vane (300) is wing-shaped, and the guide vane (300) comprises an outer convex guide surface (300-1) and a smoothly arranged guide surface (300-2).

9. The filter screen with flow equalizing function of claim 8, wherein the vertical cross-section of the flow deflector (300) is rectangular, polygonal or arc.

10. The filter screen with flow equalization function according to claim 1, wherein a plurality of flow blocking strips (15) for providing resistance to the air flow are arranged on the partition plate (13) on the side close to the air inlet (2), and the flow blocking strips (15) are arranged as convex blocks.