CN116078070B - Dry-type filter tank - Google Patents

Abstract

The invention discloses a filter support, a filter assembly and a filter box, wherein the filter support comprises a framework, and a plurality of ventilation holes and limiting thorns distributed on the framework. The framework comprises a plurality of ribs, the ribs are distributed in a crossed mode to form a plurality of ventilation holes, and limiting thorns are distributed on the ventilation inlet side of the framework. The filter component comprises the filter support with the structure, and further comprises filter fibers fixedly arranged on the filter support through limiting thorns, and ventilation openings are arranged between adjacent rows of filter fibers. The filter box with the structure comprises a filter assembly, and further comprises an outer box body, wherein the front end and the rear end of the outer box body are respectively provided with an air inlet and an air outlet, a plurality of rows of longitudinal filter assemblies are distributed between the air inlet and the air outlet, and filter fibers and ventilation openings of the front and rear adjacent two rows of filter assemblies are all staggered. The preparation process of the invention is extremely simple and convenient, the cut filter fibers can be easily fixed on the framework through the limiting thorns, and the firmness and the uniform distribution of the filter fibers can be ensured.

Description

Dry-type filter tank

Technical Field

The present invention relates to the field of automotive and general industrial spray filtration equipment, and more particularly to a filter holder, and a filter assembly and a dry filter box for arranging and fixing filter fibers by the filter holder.

Background

A large amount of paint mist can be generated in the industrial spraying process, the paint mist has great harm to human bodies and the environment, the paint mist needs to be recycled, and the paint mist is generally filtered and recycled by adopting a wet type filtering technology or a dry type filtering technology in the related technology and then is uniformly treated. Because wet filtration technology can produce a large amount of waste water, needs waste water treatment equipment, and the water purification degree of difficulty is big and with high costs, and dry filtration technology operation maintenance expense is low, to paint mist collection recovery aftertreatment produce little pollution, consequently the dry filtration technology of this stage becomes industry development trend.

When adopting dry-type filtration technology, use filter module to filter the air current that has the coating cloud, in order to guarantee to filter fully, filter module needs to guarantee to make above-mentioned air current pass through smoothly, thereby can adsorb the coating cloud in the air current again and collect the coating cloud. Therefore, the filtration modules commonly used at present are labyrinth type or honeycomb type cartons or cartons made of paper materials, the entity part of the cartons is utilized to adsorb paint mist, and the channel part is utilized to supply gas to flow. Or the filter module is made of filter fibers (such as glass fibers in common), and the filter fibers are in a fluffy state, so that the filter effect of the filter fibers is better compared with a labyrinth or honeycomb channel formed by utilizing a carton. In the dry paint mist filtration process, the gas with paint mist generally flows through the filtration module in a horizontal direction, so that the filtration fibers arranged in the filtration module are generally arranged longitudinally facing the circulating paint mist.

For example, patent document publication No. CN14971558A discloses a dry venturi paint mist trapping device, which comprises a device housing, a plurality of rows of paint mist filtering and intercepting units arranged in a staggered manner are arranged in the device housing, a gap is left between adjacent paint mist filtering and intercepting units in the same row, and the gap and the surfaces of the paint mist filtering and intercepting units on two sides form an air flow channel with a venturi structure. The paint mist trapping device filters and intercepts paint particles in a filtering mode in the early stage, and filters and intercepts paint particles in a coexisting mode of a filtering mode and an impact force mode in the later stage.

According to the scheme, the venturi structure is arranged, so that the quantity of paint particles captured by impact force is increased, the capturing and absorbing capacity of paint mist is improved, and the pollution to the environment is reduced.

However, it still has the following problems:

1) The paint mist filtering and intercepting unit comprises a columnar filtering bracket and filtering fibers arranged in the filtering bracket, and the preparation process is as follows: the cut filter fibers are plugged into the filter support through openings at two ends of the filter support, and the filter fibers are extremely soft and high in filling difficulty, and are easy to deform under stress in the process, so that the filter fibers are unevenly distributed in the filter support, and the filtering effect is affected.

2) The paint mist filtering interception unit comprises a filtering support and a filtering fiber, the filtering support and the filtering fiber lack of a connecting and fixing structure, and due to the fluffy characteristic of the filtering fiber, after paint on the filtering fiber is accumulated to a certain thickness, the filtering fiber can deform downwards under the action of the gravity of the paint, and the deformation can lead to loopholes on a filtering channel at the top of the filtering support, so that part of paint mist is directly discharged along with air flow without being filtered, and serious filtering failure problem is caused. This problem is evident when powder primers are not tacky and do not stick.

3) The connecting structure of the existing paint mist filtering and intercepting unit and the filtering box is that fixed plastic plates are arranged at the top and the bottom of a plurality of filtering columns, corresponding holes and fixed tops are formed, the plastic columns are inserted into the holes to be fixed, and the strength of the connecting structure is limited.

4) The paint mist filter interception unit is arranged at the front end of the filter box and is identical in specification with the paint mist filter interception unit at the rear end, the diameter of a filter column is small, the amount of filled fibers is small, and the density is low.

5) The diameter of the filtering column from front to back is increased, and the filling fibers in the filtering column are increased, but due to the limitation of the filtering arrangement mode, the filtering fibers with high filtering precision, high density and large thickness are required in the last step, and the filtering box space with the same volume is wasted and has large air leakage because the triangular area between square or round or diamond columns is not filtered in practice.

6) The structural arrangement of the filtering column has large gap and large air leakage near the wall plate of the filtering box.

Accordingly, there is a need for an improvement in such a structure to overcome the above-described drawbacks.

Disclosure of Invention

The invention aims to provide a filter support, a filter assembly and a dry filter box, wherein the filter assembly and the dry filter box are used for fixing filter fibers through the filter support, and the filter support is used for solving the problems of a paint mist filter interception unit in the prior art.

The technical aim of the invention is realized by the following technical scheme:

a filter support comprises a framework used as a supporting matrix, a plurality of ventilation holes distributed on the framework and used for allowing paint mist to pass through, and a plurality of limiting thorns used for fixing filter fibers;

the framework comprises a plurality of ribs, wherein the ribs are distributed in a crossed manner, gaps are formed among the ribs, the gaps and the ribs distributed around the gaps form ventilation holes for paint mist to pass through, and the ventilation holes form air flow channels; the spacing thorns are all distributed on the ventilation inlet side of skeleton, and the one end and the rib fixed connection of spacing thorns, the extension of the other end to the ventilation inlet side of skeleton of spacing thorns.

Further, one end of the limiting thorn is integrally connected with the rib.

Further, the ventilation holes are uniformly distributed on the framework, and the ventilation holes are round, square, triangular, trapezoidal, polygonal and rhombic.

A filter component is provided with a filter support, and further comprises filter fibers fixedly arranged on the filter support through limiting thorns, and ventilation openings are arranged between every two adjacent rows of the filter fibers.

The edges of the filter fibers close to the periphery of the box body extend out of the edges of the filter support.

The dry type filter box is provided with the filter assembly and further comprises an outer box body, wherein the front end and the rear end of the outer box body are respectively provided with an air inlet and an air outlet, a plurality of rows of filter assemblies are distributed between the air inlet and the air outlet, and filter fibers and ventilation openings of any two adjacent rows of filter assemblies are arranged in a staggered mode.

Further, the outer box is formed by splicing the whole long-strip-shaped flame-retardant plastic plates, splicing blocks and splicing grooves which are used for positioning and are connected in a concave-convex mode are arranged at the splicing positions, the splicing blocks and the splicing grooves are fixed and sealed through grid adhesive tapes after being spliced, and the width of the grid adhesive tapes is larger than that of the splicing blocks and the splicing grooves.

Further, a plurality of connecting strips are arranged along the inner surface of the outer box body, a plurality of connecting rings are correspondingly and respectively arranged on the connecting strips according to the interval between each row of filter fibers, and the framework of the filter assembly is fixedly connected with the outer box body through the connecting rings matched with the binding belts.

Further, the connecting strips are preset at four corner positions inside the outer box body and at the middle position of the side surface of the outer box body in the height direction.

Further, the side of the filter support of the filter assembly with the limiting thorns faces the air inlet.

Further, the thickness and the density of the filter fibers in the front row of the outer box body are not larger than those of the filter fibers in the rear row; the last row of filter fibers is formed by stacking a plurality of thin filter fibers, and the thickness of the filter fibers is larger than that of the front row of filter fibers.

Further, the size of the ventilation opening arranged at the interval of the filter fiber rows is gradually reduced from the front end to the rear end of the outer box body.

Further, the filter support of the filter assembly adopts a framework of an integral structure, the size of the framework of the integral structure is not larger than the sizes of an air inlet and an air outlet of the outer box body, and the peripheral edges of the filter fibers arranged on the framework extend out of the edges of the framework and form a sealing structure with the periphery of the inner wall of the outer box body.

Further, the filter support is of a split structure and comprises a plurality of independently arranged frameworks, and the arrangement positions of the frameworks correspond to the positions of the filter fibers.

Further, the air outlet of the outer box body is provided with an integral anti-drop net, the anti-drop net is clung to the filter fiber of the last layer arranged at the air outlet of the outer box body, and the filter fiber of the last layer is formed by overlapping a plurality of single-layer filter fibers with high density, low thickness and high filter precision.

Further, if the widths and the column pitches of the filter fibers in the front row and the rear row are the same, the whole filter fibers with the sizes larger than those of the air inlet and the air outlet are adopted, the filter fibers used for the front row are cut according to the column pitches of the front row, and delay edges are arranged on the periphery of the cut whole filter fibers and used for sealing the filter assemblies of the rear row.

In summary, the invention has the following beneficial effects:

1. the invention provides a filter support, which is characterized in that a limiting thorn for fixing filter fibers is arranged on a framework, so that the strength of a connecting structure between the filter fibers and the framework is greatly improved, and even if paint on the filter fibers is accumulated to a certain amount, the supporting effect provided by the limiting thorn can not lead the filter fibers to deform downwards under the action of the gravity of the paint, thereby avoiding the problem of filtration failure caused by downward deformation of the filter fibers.

2. The filter component comprises the filter support and the filter fibers arranged on the filter support, and the filter support is provided with the limiting thorns for fixing the filter fibers, so that the preparation process is extremely simple and convenient, and the cut filter fibers can be completed only by fixing the limit thorns on the framework.

The filter fiber cannot be deformed under force in the process, so that the filtering effect is ensured.

3. According to the invention, the filtering component and the outer box body are connected and fixed by adopting the structure of the ribbon matched with the connecting ring, and the connecting structure has high strength and can effectively prevent the filtering component from being separated from the outer box body.

4. According to the invention, according to the working environments of the filter assemblies arranged at different positions of the outer box body, the filter assemblies with various specifications are arranged, and the filter fibers are arranged along the flowing direction of paint mist in the invention, so that the paint mist adsorption capacity of different filter fibers is balanced, the filter performance of the filter fibers is fully exerted, the replacement frequency is reduced, the utilization rate of the filter assemblies is effectively improved, and the cost is reduced.

Drawings

FIG. 1 is a block diagram of a unitary filter holder according to the present invention.

Fig. 2 is a block diagram of a split filter holder according to the present invention.

Fig. 3 is a schematic view of a unitary filter holder according to the present invention.

Fig. 4 is a schematic view of a split filter holder according to the present invention.

Fig. 5 is a schematic view of a filter fiber according to the present invention.

Fig. 6 is a schematic view of a filter assembly according to the present invention.

Fig. 7 is a top view of a unitary filter holder according to the present invention.

Fig. 8 is a top view of a split filter holder according to the present invention.

Fig. 9 is a schematic view of irregularly distributed spacing spines according to the present invention.

Fig. 10 is a schematic view of a front row of filter fibers according to the present invention.

Fig. 11 is a schematic view of a rear row of filter fibers according to the present invention.

Fig. 12 is a schematic view of a front row filter assembly according to the present invention.

Fig. 13 is a schematic view of a rear filter assembly according to the present invention.

Fig. 14 is a cross-sectional view of a filter box according to the present invention.

Fig. 15 is a schematic view of an outer case according to the present invention.

Fig. 16 is a schematic view of an outer case according to the present invention.

Fig. 17 is a schematic view of a connecting strip according to the present invention.

Fig. 18 is a schematic view of the connection of the filter assembly and the outer housing according to the present invention.

Fig. 19 is an enlarged view of the connection of the filter assembly and the outer housing according to the present invention.

FIG. 20 is a schematic view of the cutting of the integral filter fibers of the present invention.

The reference numerals in the figures illustrate: the air conditioner comprises a framework 1, ribs 11, ventilation holes 2, limit thorns 3, filter fibers 4, ventilation holes 41, an outer box 5, an air inlet 51, an air outlet 52, splicing blocks 53, splicing grooves 54, connecting strips 55, connecting rings 56 and binding belts 57.

Description of the embodiments

In order that the manner in which the above-recited features, advantages, objects and advantages of the invention are obtained, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

Referring to fig. 1 to 20, the invention discloses a filter support, which comprises a framework 1 used as a supporting matrix, a plurality of ventilation holes 2 distributed on the framework 1 and used for passing paint mist, and a plurality of limiting thorns 3 used for fixing filter fibers 4;

the framework 1 comprises a plurality of ribs 11, wherein the ribs 11 are distributed in a crossed manner, gaps are formed among the ribs 11, the gaps and the ribs 11 distributed around the gaps form ventilation holes 2 for paint mist to pass through, and the ventilation holes 2 form air flow channels; the limiting thorns 3 are all distributed on the ventilation inlet side of the framework 1, one end of each limiting thorn 3 is fixedly connected with the corresponding rib 11, and the other end of each limiting thorn 3 extends towards the ventilation inlet side of the framework 1.

One end of the limiting thorn 3 is integrally connected with the rib 11.

The ventilation holes 2 are uniformly distributed on the framework 1, and the ventilation holes 2 are round, square, triangular, trapezoid, polygonal and rhombic.

A filter assembly is provided with a filter support, and further comprises filter fibers 4 fixedly arranged on the filter support through limiting thorns 3, and ventilation openings 41 are arranged between every two adjacent rows of the filter fibers 4.

The edges of the filter fibers 4 close to the periphery of the box body extend out of the edges of the filter support.

The dry type filter box is provided with the filter assembly and further comprises an outer box body 5, an air inlet 51 and an air outlet 52 are respectively arranged at the front end and the rear end of the outer box body 5, a plurality of rows of filter assemblies are distributed between the air inlet 51 and the air outlet 52, and filter fibers 4 and ventilation openings 41 of any two adjacent rows of filter assemblies are arranged in a staggered mode.

The outer box 5 is formed by splicing integral strip-shaped flame-retardant plastic plates, splicing blocks 53 and splicing grooves 54 which are used for positioning and are connected in a concave-convex mode are arranged at the splicing positions, the splicing blocks 53 and the splicing grooves 54 are spliced and then fixed and sealed through grid adhesive tapes, and the width of the grid adhesive tapes is larger than that of the splicing blocks 53 and the splicing grooves 54.

A plurality of connecting strips 55 are arranged along the inner surface of the outer box body 5, a plurality of connecting rings 56 are correspondingly and respectively arranged on the connecting strips 55 according to the interval of each row of filter fibers 4, and the framework 1 of the filter assembly is fixedly connected with the outer box body 5 through a binding belt 57 matched with the connecting rings 56.

The connecting strips 55 are preset at four corner positions inside the outer box 5 and at the middle position of the side surface of the outer box 5 in the height direction.

The side of the filter support of the filter assembly with the limiting thorns 3 faces the air inlet 51.

The thickness and the density of the filter fibers 4 in the front row of the outer box body 5 are not larger than those of the filter fibers 4 in the rear row; the last row of filter fibers 4 is formed by stacking a plurality of thin filter fibers 4 having a thickness greater than the thickness of the preceding row of filter fibers 4.

The size of the ventilation openings 41 arranged at the intervals of the rows of the filter fibers 4 gradually decreases from the front end to the rear end of the outer casing 5.

The filtering support of the filtering component adopts a framework 1 with an integral structure, the size of the framework 1 with the integral structure is not larger than that of an air inlet 51 and an air outlet 52 of an outer box body 5, and the peripheral edges of filtering fibers 4 arranged on the framework 1 extend out of the edge of the framework 1 and the periphery of the inner wall of the outer box body 5 to form a sealing structure.

The filter support is of a split structure and comprises a plurality of independently arranged frameworks 1, and the arrangement positions of the frameworks 1 correspond to the positions of the filter fibers 4.

The air outlet 52 of the outer box body 5 is provided with an integral anti-drop net, the anti-drop net is clung to the filter fiber 4 of the last layer arranged at the air outlet 52 of the outer box body 5, and the filter fiber 4 of the last layer is formed by overlapping a plurality of single-layer filter fibers 4 with high density, low thickness and high filter precision.

If the widths and the column pitches of the filter fibers 4 in the front and rear adjacent rows are the same, the filter fibers 4 for the front row are cut out according to the column pitches of the front row by adopting the integral filter fibers with the sizes larger than the sizes of the air inlet 51 and the air outlet 52, and the cut integral filter fibers are provided with delay edges at the periphery for sealing the filter assemblies of the rear row.

Examples

The embodiment provides a filter support, which comprises a framework 1, and a plurality of ventilation holes 2 and limiting thorns 3 which are distributed on the framework 1. The framework 1 comprises a plurality of plastic strips 11, the plastic strips 11 are distributed in a crossed mode to form a plurality of ventilation holes 2, and the limiting thorns 3 are distributed on one face of the framework 1.

In this embodiment, one end of the limiting thorn 3 is connected with the plastic strip 11, and the other end of the limiting thorn 3 extends outwards. In the practical application process, the extending direction of the limiting thorn 3 can be slightly upward, so that the falling-off of the filter fibers 4 is better prevented.

In this embodiment, the ventilation holes 2 are uniformly distributed on the skeleton 1, the ventilation holes 2 may be used as channels through which paint mist flows, specifically, the shape of the ventilation holes 2 includes, but is not limited to, a circle, a square, a polygon, and a diamond, and the shape of the ventilation holes 2 may be selected according to the requirements, which is not limited in this invention.

According to the embodiment, the limiting thorns 3 used for fixing the filter fibers 4 are arranged on the framework 1, so that the connection structural strength between the filter fibers 4 and the framework 1 is greatly improved, and even if a certain amount of paint on the filter fibers 4 is accumulated, the supporting effect provided by the limiting thorns 3 can not enable the filter fibers 4 to deform downwards under the action of the gravity of the paint, so that the problem of filtration failure caused by the downward deformation of the filter fibers is avoided.

Meanwhile, the structure makes the preparation process of the invention extremely simple and convenient, and can be completed only by fixing the cut filter fibers 4 on the framework 1 through the limiting thorns 3. The filter fibers 4 are not deformed by force in the above process, thereby ensuring the filtering effect.

Examples

A filter assembly comprising a filter holder and filter fibres 4 arranged on the filter holder, wherein ventilation openings 41 are provided in the filter fibres 4.

The filter fibers 4 in the present embodiment have a height value H in the up-down direction, a width value W in the left-right direction, and a thickness value d in the front-rear direction, H > d, and W > d so that the filter fibers 4 have a flat block shape. The filter fiber 4 that is flat cubic arrangement in this embodiment can adsorb with the contact of great area and coating cloud, and filter fiber 4 can adsorb the coating cloud more evenly, avoids appearing the part to inhale full coating cloud and the local condition emergence that does not adsorb the coating cloud, promotes the utilization ratio of filter fiber 4, reduces and changes the frequency, full play filter fiber's filter effect.

However, in this case, if the filter fiber 4 is prepared to have a proper bulk, the filter fiber is liable to be loosened and broken due to collapse, dropping, and the like, and particularly, the filter fiber 4 is liable to be loosened and broken due to an increase in the action of gravity which is received after adsorbing paint mist. In this embodiment, in order to ensure that the filter fiber 4 has proper fluffiness and is designed into a flat block shape, and can also maintain its stability when applied, and the conditions of loosening, breaking, falling off, etc. do not occur, the filter support in embodiment 1 is adopted to position the filter fiber 4, and by setting the spacing thorn 3 for fixing the filter fiber 4 on the framework 1, the connection structural strength between the filter fiber 4 and the framework 1 is greatly improved, and even if the paint on the filter fiber 4 is accumulated to a certain amount, the supporting effect provided by the spacing thorn 3 also can not make the filter fiber 4 deform downwards under the action of the gravity of the paint, thereby avoiding the problem of filtration failure caused by downward deformation of the filter fiber 4.

Examples

A filter box is provided with the filter assembly according to the embodiment 2, and further comprises an outer box body 5, wherein an air inlet 51 and an air outlet 52 are respectively arranged at the front end and the rear end of the outer box body 5, a plurality of rows of filter assemblies are arranged between the air inlet 51 and the air outlet 52, and filter fibers 4 and ventilation openings 41 of any two adjacent rows of filter assemblies are arranged in a staggered manner.

The staggered arrangement in this embodiment refers to: the ventilation openings 41 between the filter fibers 4 of the filter assembly of the previous row correspond to the filter fibers 4 of the filter assembly of the next row in the front-to-rear direction. The staggered arrangement can change the circulation direction of the paint mist, namely, the paint mist can be blocked and adsorbed by the filter fibers 4 of the filter assembly of the next row after passing through the ventilation openings 41 among the filter fibers 4 of the filter assembly of the previous row, and then the circulation direction is changed until the paint mist flows backwards again along the ventilation openings 41 among the filter fibers 4 of the filter assembly of the next row. The staggered arrangement of the filter fibers 4 in this way has the following advantageous effects: the circulation direction of the paint mist is changed for a plurality of times, so that the circulation speed of the paint mist can be slowed down, the contact time of the paint mist and the filter fiber 4 can be prolonged, and the filter fiber 4 can fully adsorb the paint mist; the impact force of the paint mist on the filter fiber 4 is reduced due to the reduction of the circulation speed of the paint mist, so that the stability of the filter fiber 4 can be further ensured.

Furthermore, in this embodiment, the arrangement density of the filter fibers 4 is designed, so that the arrangement density of the filter fibers 4 is increased along the flowing direction of paint mist, that is, from front to back, so as to balance the paint mist adsorption amounts of different filter fibers 4, fully exert the filtering performance of the filter fibers 4, and reduce the replacement frequency. In this embodiment, the following means are adopted to achieve the purpose of balancing the paint mist adsorption amounts of different filter fibers 4: the size of the ventilation openings 41 between the filter fibers 4 of the filter assembly at the front end is larger than the size of the ventilation openings 41 between the filter fibers 4 of the filter assembly at the rear end, and the interval between the filter assemblies between the front and rear groups is gradually reduced. In this embodiment, the two different means are provided to achieve the purpose of balancing the paint mist adsorption amounts of different filter fibers, and it should be noted that one of the four different means may be adopted alone or two of the four different means may be adopted in combination.

Specifically, in this embodiment, eight rows of filter assemblies are arranged at intervals from front to back, and four groups of identical filter fibers 4 are arranged on the first row of filter assemblies and the second row of filter assemblies along the front-to-back direction, wherein the identical filter fibers 4 refer to that the parameters such as the width, the thickness, the density and the like of the filter fibers 4 are identical. Four groups of identical filter fibers 4 are arranged on the filter assemblies of the third row and the fourth row, five groups of identical filter fibers 4 are arranged on the filter assemblies of the fifth row and the sixth row, and six groups of identical filter fibers 4 are arranged on the filter assemblies of the seventh row and the eighth row. In addition, the density of the filter fibers 4 on the filter assemblies of the third and fourth rows is greater than the density of the filter fibers 4 on the filter assemblies of the first and second rows, and the spacing between the filter fibers 4 on the filter assemblies of the third and fourth rows is less than the spacing between the filter fibers 4 on the first and second rows of the first stiles 2. By analogy, the filter fibers 4 on the fifth and sixth rows of filter elements also exhibit such a law as compared to the filter fibers 4 on the third and fourth rows of filter elements, and the filter fibers 4 on the seventh and eighth rows of filter elements also exhibit such a law as compared to the filter fibers 4 on the fifth and sixth rows of filter elements. Therefore, in the process of passing through the eight rows of filter fibers 4, the circulation direction needs to be changed for many times, so that the circulation speed of the paint mist can be greatly slowed down, the contact area and time of the paint mist and the filter fibers are increased, the filter fibers can fully adsorb the paint mist, and the filtering effect is improved.

The outer box 5 is formed by splicing long-strip flame-retardant plastics, tooth-shaped or semicircular splicing blocks 53 and splicing grooves 54 used for positioning are arranged at the splicing positions, the splicing blocks 53 and the splicing grooves 54 are fixed and sealed through grid adhesive tapes after being spliced, and the width of the grid adhesive tapes is larger than that of the splicing blocks 53 and the splicing grooves 54. Considering that the outer case 5 needs to be sleeved outside the frame 1, the outer case needs to be made slightly larger in size than the whole frame 1 during manufacturing to ensure that the outer case 5 can be sleeved outside the frame 1. Thus, after the assembly is completed, gaps are inevitably formed between the side wall of the outer box body 5 and the framework 1, paint mist can pass through the gaps and is not adsorbed by the filter fibers 4, and therefore, insufficient filtration can be caused by the gaps. In this embodiment, in order to further improve the filtering effect, the edge of the side edge of the filtering fiber 4 extending out of the framework 1 and the inner side wall of the outer box 5 form a sealing structure, so as to prevent the paint mist from being discharged without being filtered.

A plurality of connecting strips 55 are arranged along the inner surface of the outer box body 5, a plurality of connecting rings 56 are uniformly arranged on the connecting strips 55, and the framework 1 of the filter assembly is fixedly connected with the outer box body 5 through a binding belt 57 matched with the connecting rings 56. The connecting strips 55 are preset at four corner positions inside the outer box 5 and at the middle position of the side surface of the outer box 5 in the height direction by pasting.

In this embodiment, the filtering component is connected with the outer case 5 by using a binding tape, it is easy to understand that the frame 1 of the filtering component has the ventilation hole 2, the ventilation hole 2 is used for the paint mist flow passage and simultaneously can be easily penetrated by the binding tape 57, and the connecting ring 56 is also arranged inside the outer case 5. The filter assembly is prevented from being separated from the outer case 5 by passing the band 57 through the vent holes 2 at the edge positions of the frame 1 and the connection rings 56 at the corresponding positions and then locking the band 57. It will be appreciated that in other embodiments, connectors other than straps, such as conventional snaps or clamps, may be used to connect the filter assembly to the outer housing.

The side of the filter support of the filter assembly with the limiting thorns 3 faces the air inlet 51. By adopting the structure, the filter fiber 4 is ensured not to be separated from the limiting thorn 3.

In this embodiment, the thickness and density of the filter fibers 4 at the front end of the outer casing 5 are smaller than those of the filter fibers 4 at the rear end of the outer casing 5. The density described herein is understood to be the number of glass filaments disposed per unit volume. By adopting the arrangement mode along the flowing direction of paint mist, the arrangement of the glass fibers 4 can follow the principle of front thinning and rear thinning, good filtering effect can be obtained, and meanwhile, each row of glass fibers 4 can reach the replacement standard at approximately the same time, so that the replacement frequency can be reduced. The filter fiber directly purchased in the market is in a longer flat block shape (generally rolled into a bundle for convenient transportation), and the filter fiber 4 required in the embodiment can be obtained by directly cutting according to the required size after purchasing, without manual tearing operation, and the damage to the skin of workers is reduced.

The filtering support of the filtering component adopts a framework 1 with an integral structure, the size of the framework 1 with the integral structure is equal to that of an air inlet 51 and an air outlet 52 of an outer box body 5, and the side edges of filtering fibers 4 arranged on the framework 1 extend out of the edge of the framework 1 and the inner side wall of the outer box body 5 to form a sealing structure.

The filter support is of a split structure and comprises a plurality of independently arranged frameworks 1, and the arrangement positions of the frameworks 1 correspond to the positions of the filter fibers 4.

The air outlet 52 of the outer box body 5 is provided with an anti-drop net, the anti-drop net is clung to the filter fiber 4 of the last layer arranged at the air outlet 52 of the outer box body 5, and the thickness of the filter fiber 4 of the last layer is minimum, and the hardness and the density are maximum. Since the wind power of the air outlet 52 is maximum, the present embodiment is provided with an anti-drop net particularly at the air outlet 52 in order to prevent drop.

The bottom of the air inlet 51 of the outer box body 5 is provided with an upward-turned folded edge, and two ends of the folded edge are adhered to the side face of the outer box body 5 by hot melt adhesive.

In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", etc. refer to the directions or positional relationships based on those shown in the drawings, and are merely for clarity and convenience of description of the expression technical solution, and thus should not be construed as limiting the present invention.

In this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a list of elements is included, and may include other elements not expressly listed.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A dry filter box, which is characterized by comprising an outer box body (5), a filter bracket and filter fibers (4) arranged in the outer box body (5);

the front end and the rear end of the outer box body (5) are respectively provided with an air inlet (51) and an air outlet (52), a plurality of rows of filter assemblies are arranged between the air inlet (51) and the air outlet (52), each filter assembly comprises a filter support and filter fibers (4), and the filter fibers (4) and ventilation openings (41) of any two adjacent rows of filter assemblies are arranged in a staggered manner;

the filter fibers (4) are fixedly arranged on the filter support through limiting thorns (3), and ventilation openings (41) are formed between every two adjacent rows of the filter fibers (4); the thickness and the density of the filter fibers (4) in the front row of the outer box body (5) are smaller than those of the filter fibers (4) in the rear row; the filter fibers (4) of the last row are formed by superposing a plurality of thin filter fibers (4), and the thickness of the filter fibers is larger than that of the filter fibers (4) of the front row;

the filtering bracket comprises a framework (1) used as a supporting matrix, a plurality of ventilation holes (2) distributed on the framework (1) and used for allowing paint mist to pass through, and a plurality of limiting thorns (3) used for fixing filtering fibers (4);

the framework (1) comprises a plurality of ribs (11), wherein the ribs (11) are distributed in a crossed mode, gaps are formed among the ribs (11), the gaps and the ribs (11) distributed around the gaps form ventilation holes (2) for paint mist to pass through, and the ventilation holes (2) form air flow channels; the limiting thorns (3) are distributed on the ventilation inlet side of the framework (1), a plurality of rows of limiting thorns (3) are arranged on the framework (1) from top to bottom, one end of each limiting thorn (3) is fixedly connected with the corresponding rib (11), and the other end of each limiting thorn (3) extends to the ventilation inlet side of the framework (1); one end of the limiting thorn (3) is integrally connected with the rib (11);

the ribs (11) are made of plastic, and the filter fibers are glass fibers.

2. Dry filter tank according to claim 1, characterized in that the ventilation holes (2) are uniformly distributed on the skeleton (1), the shape of the ventilation holes (2) being circular, square, triangular, trapezoidal, polygonal or diamond.

3. The dry type filter box according to claim 1, wherein the outer box body (5) is formed by splicing integral strip-shaped flame-retardant plastic plates, splicing blocks (53) and splicing grooves (54) which are used for positioning and are connected in a concave-convex mode are arranged at the splicing positions, the splicing blocks (53) and the splicing grooves (54) are fixed and sealed through grid adhesive tapes after being spliced, and the width of the grid adhesive tapes is larger than that of the splicing blocks (53) and the splicing grooves (54).

4. Dry filter tank according to claim 1, characterized in that a plurality of connecting strips (55) are arranged along the inner surface of the outer tank body (5), a plurality of connecting rings (56) are correspondingly and respectively arranged on the connecting strips (55) according to the interval of each row of filter fibers (4), and the framework (1) of the filter assembly is fixedly connected with the outer tank body (5) through a binding belt (57) matched with the connecting rings (56).

5. Dry filter tank according to claim 4, characterized in that the connecting bars (55) are preset at four corner positions inside the outer tank (5) and at intermediate positions in the height direction of the side face of the outer tank (5).

6. Dry filter tank according to claim 1, characterized in that the side of the filter holder of the filter assembly with the limiting thorns (3) is arranged towards the air inlet (51).

7. Dry filter tank according to claim 1, characterized in that the size of the ventilation openings (41) open at the column pitch of the filter fibers (4) decreases gradually from the front end to the rear end of the outer tank (5).

8. The dry filter box according to claim 1, wherein the filter support of the filter assembly is a framework (1) with an integral structure, the size of the framework (1) with the integral structure is not larger than the sizes of an air inlet (51) and an air outlet (52) of the outer box body (5), and the peripheral edges of the filter fibers (4) arranged on the framework (1) extend out of the edge of the framework (1) and form a sealing structure with the periphery of the inner wall of the outer box body (5).

9. Dry filter tank according to claim 1, characterized in that the filter support is of a split structure comprising a plurality of independently arranged skeletons (1), the arrangement positions of the skeletons (1) corresponding to the positions of the filter fibers (4).

10. Dry filter tank according to claim 1, characterized in that an integral anti-drop net is provided at the air outlet (52) of the outer tank (5), said anti-drop net being in close contact with the last layer of filter fibres (4) provided at the air outlet (52) of the outer tank (5).