CN220143803U - Electrostatic powder spraying filter equipment - Google Patents

Abstract

The utility model relates to an electrostatic powder spraying and filtering device, which comprises: the electrostatic spraying device comprises an electrostatic spraying box body, a powder filtering box body and an exhaust fan; the electrostatic spraying box body is internally provided with an electrostatic filtering part and a coating spraying part, the coating spraying part is used for placing a workpiece to be sprayed with static electricity, and the electrostatic filtering part is provided with an anti-electrostatic filter cylinder; the powder filtering box is internally provided with a film-coated filter cylinder, one end of the antistatic filter cylinder is communicated with the powder filtering box, and the exhaust opening of the exhaust fan is communicated with one end of the film-coated filter cylinder. According to the scheme provided by the utility model, electrostatic powder spraying can be filtered.

Description

Electrostatic powder spraying filter equipment

Technical Field

The utility model relates to the field of powder filtration, in particular to an electrostatic powder spraying and filtering device.

Background

Powder coating is a new process in the surface coating technology, and is a coating process for coating in a powder form and forming a coating film; the powder spraying is to spray powder coating on the surface of a workpiece by using powder spraying equipment (an electrostatic spraying machine), and the powder can be uniformly adsorbed on the surface of the workpiece under the action of static electricity to form a powdery coating; the powder coating is baked, leveled and solidified at high temperature to become a final coating with different effects (different types of effects of the powder coating); the spraying effect of the powder spraying is superior to that of the spraying technology in the aspects of mechanical strength, adhesive force, corrosion resistance, aging resistance and the like.

Generally, an electrostatic powder spraying system mainly comprises a powder supply device, an electrostatic spray gun and control device, an electrostatic generating device (generally configured in the electrostatic spray gun) and a powder recovery device; the materials for electrostatic powder spraying commonly used at present are: epoxy polyester resin, pure polyester resin, blocked isocyanate, titanium pigment, barium sulfate, calcium carbonate, curing agent and other anticorrosive powder coating auxiliary agents. Different powder coating auxiliary agents can be selected according to the coating effect requirements of the workpiece.

The electrostatic powder spraying is usually carried out in a closed room, namely the electrostatic powder spraying is usually carried out in a powder spraying cabinet, after the workpiece is subjected to the electrostatic powder spraying, more powder coating remains in the air, and if the air with the powder coating is directly discharged to the outside without being filtered, the environment can be polluted, and even the body health of a processing worker can be adversely affected; therefore, after the electrostatic powder spraying is finished in the powder spraying cabinet, the gas in the powder spraying cabinet needs to be filtered to remove the powder coating in the air, so that the gas can be discharged; meanwhile, the powder coating after gas filtration is recycled, the use efficiency of the powder coating can be improved, and the processing cost is reduced.

Because the air with the powder coating cannot be directly discharged to the outside after electrostatic powder spraying, the air is required to be filtered through equipment, and dust explosion is easy to generate when the air is filtered in a closed space of the equipment; the dust explosion refers to dust cloud formed by mixing combustible dust with air in a limited space, and the formed dust-air mixture burns rapidly under the action of an ignition source and causes chemical reaction of temperature and pressure rapid rise; the generation of dust explosion easily damages electrostatic powder spraying equipment, and even can cause physical injury to processing workers; however, the existing filtering equipment for electrostatic powder spraying has few explosion-proof devices, and the filter element of the filtering equipment has no antistatic effect, so that dust explosion is easy to occur, and a large potential safety hazard exists in the use process.

For example, the Chinese patent with publication number of CN207929459U and patent name of "secondary powder spraying recovery cabinet" is aimed at solving the problems that the powder spraying recovery cabinet is externally connected with an air pipe, dust is discharged from an air outlet of the air pipe, and the environment protection detection is unqualified, so as to prevent secondary pollution to the environment, and specifically adopts the structures of an automatic reciprocating lifter, an integrated spraying chamber, a primary powder separation cabinet and a spray powder secondary recovery cabinet, and uses the automatic reciprocating lifter to control muzzles of a plurality of spray guns to enter the integrated spraying chamber so as to spray powder on a workpiece; in the process, the integrated spray booth is communicated with the primary powder separating cabinet, and the primary powder separating cabinet is communicated with the spray powder secondary recovery cabinet, so that gas with powder coating enters the primary powder separating cabinet from the integrated spray booth and then enters the spray powder secondary recovery cabinet; the spray powder secondary recovery cabinet comprises a secondary powder filter element recovery box, wherein the secondary powder filter element recovery box is provided with a back-blowing recovery filter element, a back-blowing pulse device is arranged above the back-blowing recovery filter element, a recovery fan is arranged above the back-blowing pulse device, a powder collecting box is arranged below the secondary powder filter element recovery box, and powder coating on the back-blowing recovery filter element is blown down on the powder collecting box through the back-blowing pulse device and the recovery fan, so that the powder coating is filtered and recovered; the movable universal wheels are arranged at the bottom of the powder collection box, so that the powder collection box can be moved conveniently; the noise of the recovery fan is reduced by arranging the silencer on the recovery fan; but the equipment can not solve the technical problem that dust explosion is easy to occur in the process of gas filtration after electrostatic powder spraying.

Therefore, how to filter electrostatic powder spraying is a technical problem that needs to be solved by the current technicians.

Disclosure of Invention

In order to overcome the problems in the related art, the present utility model provides a filtering device for powder spraying equipment, which can realize the filtering of electrostatic powder spraying.

To achieve the above object, the present utility model provides a filter device for a powder spraying apparatus, comprising: the electrostatic spraying device comprises an electrostatic spraying box body, a powder filtering box body and an exhaust fan; the electrostatic spraying box body is internally provided with an electrostatic filtering part and a coating spraying part, the coating spraying part is used for placing a workpiece to be sprayed with static electricity, and the electrostatic filtering part is provided with an anti-electrostatic filter cylinder; the powder filtering box is internally provided with a film-coated filter cylinder, one end of the antistatic filter cylinder is communicated with the powder filtering box, and the exhaust opening of the exhaust fan is communicated with one end of the film-coated filter cylinder.

Preferably, the top of the powder filtering box body is provided with a pulse powder removing box body, and the top of the pulse powder removing box body is provided with an air draft discharging box body; the top of the pulse powder removing box body is provided with an air outlet, the bottom of the pulse powder removing box body is provided with an air inlet, the air inlet of the pulse powder removing box body corresponds to the port of the film-covered filter cylinder, the pulse powder removing box body is internally provided with a pulse dust remover, and the air blowing opening of the pulse dust remover corresponds to the air inlet of the pulse powder removing box body.

Preferably, the bottom of the powder filtering box body is provided with a powder recycling box body, the top of the powder recycling box body is communicated with the bottom of the powder filtering box body, and the powder recycling box body is used for storing dust falling off from the film-covered filter cylinder.

Preferably, the exhaust fan is fixed in the exhaust fan discharging box body, wherein the exhaust fan comprises a volute chamber and a centrifugal pump, an exhaust opening of the volute chamber is communicated with an air outlet of the pulse powder removing box body, and blades of the centrifugal pump are arranged in the volute chamber.

Preferably, the bottom of the powder recovery box body is provided with an electric ash discharging valve, an ash inlet of the electric ash discharging valve is communicated with the bottom of the powder recovery box body, and an ash outlet of the electric ash discharging valve is arranged outside the powder recovery box body.

Preferably, the electrostatic spraying device further comprises a powder suction pipeline, wherein a first port of the powder suction pipeline is communicated with the powder filtering box body, a second port of the powder suction pipeline is communicated with the electrostatic spraying box body, a communicating position of the electrostatic spraying box body is positioned at the electrostatic filtering part, and a port of the electrostatic prevention filter cylinder is aligned with the communicating position of the electrostatic spraying box body.

Preferably, the air exhaust device further comprises an air exhaust pipeline which is communicated with the air exhaust box body through a connecting pipeline, and the port of the connecting pipeline is aligned with the air outlet of the air exhaust box body.

Preferably, the middle part of the powder suction pipeline is provided with a one-way explosion-proof valve.

Preferably, the side wall of the powder filtering box body is provided with a flameless explosion venting device.

Preferably, the bottom of the electrostatic spraying box body is provided with a powder recovery groove, and the powder recovery groove is positioned at the coating spraying part.

The technical scheme provided by the utility model can comprise the following beneficial effects:

in the technical scheme, an electrostatic spraying box body, a powder filtering box body and an exhaust fan are arranged; the electrostatic spraying box body is internally provided with an electrostatic filtering part and a coating spraying part, the coating spraying part is used for placing a workpiece to be sprayed with static electricity, and the electrostatic filtering part is provided with an anti-electrostatic filter cylinder; a film-coated filter cylinder is arranged in the powder filter box body, one end of the antistatic filter cylinder is communicated with the powder filter box body, and an exhaust opening of the exhaust fan is communicated with one end of the film-coated filter cylinder; when the electrostatic powder spraying is required to be filtered, firstly placing a workpiece to be sprayed with static electricity on a coating spraying part, then carrying out electrostatic powder spraying on the workpiece, wherein gas in an electrostatic spraying box body is provided with a large amount of powder coating in the spraying process, starting an exhaust fan, communicating an exhaust opening of the exhaust fan with one end of a coated filter cylinder, enabling the interior of the powder filtering box body to form negative pressure, simultaneously communicating one end of an antistatic filter cylinder with the powder filtering box body, and enabling the gas to enter the powder filtering box body after being filtered for the first time by the antistatic filter cylinder from the electrostatic filtering part, leaving a part of powder coating on the surface of the antistatic filter cylinder, and leaving the residual powder coating in the gas on the surface of the coated filter cylinder after being filtered by the second time of the coated filter cylinder of the powder filtering box body, and extracting the filtered gas outside the device by the exhaust fan.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.

Drawings

The foregoing and other objects, features and advantages of the utility model will be apparent from the following more particular descriptions of exemplary embodiments of the utility model as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the utility model.

FIG. 1 is a schematic view showing the overall internal structure of a filtering apparatus according to an embodiment of the present utility model;

FIG. 2 is a schematic view showing the overall structure of a filtering apparatus according to an embodiment of the present utility model;

FIG. 3 is an internal structural view of a powder filtration tank according to an embodiment of the present utility model;

in the figure: the electrostatic spraying device comprises an electrostatic spraying box body 1, an electrostatic filtering part 11, an antistatic filter cylinder 111, a coating spraying part 12, a workpiece 121 to be sprayed, a powder recovery groove 122, a powder filtering box body 2, a film covering filter cylinder 21, a flameless explosion venting device 22, a pulse powder removing box body 3, an air outlet 31, an air inlet 32, a pulse dust collector 33, an air draft discharging box body 4, an air draft fan 41, a volute 411, a centrifugal pump 412, a powder recovery box body 5, an electric dust discharging valve 51, a powder suction pipeline 6, a one-way explosion-proof valve 61, a first port 62, a second port 63, an air exhaust pipeline 7 and a connecting pipeline 8.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments of the present utility model. All other embodiments obtained by those skilled in the art without making any inventive effort are within the scope of the present utility model. Preferred embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present utility model are shown in the drawings, it should be understood that the present utility model may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

In the description of the present utility model, it should be understood that the terms "thickness," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the utility model. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The following describes the technical scheme of the embodiment of the present utility model in detail with reference to the accompanying drawings.

Referring to fig. 1 to 3, the filtering apparatus for a powder spraying device includes:

an electrostatic spraying box 1, a powder filtering box 2 and an exhaust fan 41; an electrostatic filtering part 11 and a paint spraying part 12 are arranged in the electrostatic spraying box body 1, the paint spraying part 12 is used for placing a workpiece 121 to be sprayed with static electricity, and the electrostatic filtering part 11 is provided with an anti-static filter cylinder 111; the powder filtration box 2 is internally provided with a film-coated filter cartridge 21, one end of the antistatic filter cartridge 111 is communicated with the powder filtration box 2, and an exhaust port of the exhaust fan 41 is communicated with one end of the film-coated filter cartridge 21.

Specifically, the top of the powder filtering box body 2 is provided with a pulse powder removing box body 3, and the top of the pulse powder removing box body 3 is provided with an air draft discharging box body 4; the top of pulse powder removal box 3 is equipped with air outlet 31, the bottom of pulse powder removal box 3 is equipped with air intake 32, air intake 32 of pulse powder removal box 3 with the port of tectorial membrane filter cylinder 21 corresponds, just the inside of pulse powder removal box 3 is equipped with pulse dust remover 33, the air blowing mouth of pulse dust remover 33 with air intake 32 of pulse powder removal box 3 corresponds.

Specifically, the bottom of the powder filtering box body 2 is provided with a powder recycling box body 5, the top of the powder recycling box body 5 is communicated with the bottom of the powder filtering box body 2, and the powder recycling box body 5 is used for storing dust falling off from the film-covered filter cylinder 21.

Specifically, the exhaust fan 41 is fixed inside the exhaust fan discharging box 4, wherein the exhaust fan 41 includes a volute 411 and a centrifugal pump 412, an exhaust port of the volute 411 is communicated with the air outlet 31 of the pulse powder removing box 3, and blades of the centrifugal pump 412 are disposed inside the volute 411.

Specifically, the bottom of the powder recovery box 5 is provided with an electric ash discharge valve 51, an ash inlet of the electric ash discharge valve 51 is communicated with the bottom of the powder recovery box 5, and an ash discharge port of the electric ash discharge valve 51 is arranged outside the powder recovery box 5.

Specifically, the electrostatic spraying device further comprises a powder suction pipeline 6, a first port 62 of the powder suction pipeline 6 is communicated with the powder filtering box 2, a second port 63 of the powder suction pipeline 6 is communicated with the electrostatic spraying box 1, the communicating position of the electrostatic spraying box 1 is located at the electrostatic filtering part 11, and the port of the electrostatic prevention filter cylinder 111 is aligned with the communicating position of the electrostatic spraying box 1.

Specifically, the air exhaust device also comprises an air exhaust pipeline 7, wherein the air exhaust pipeline 7 is communicated with the air exhaust and discharge box 4 through a connecting pipeline 8, and a port of the connecting pipeline 8 is aligned with an air outlet of the air exhaust and discharge box 4.

Specifically, the middle part of the powder suction pipe 6 is provided with a one-way explosion-proof valve 61.

Specifically, the side wall of the powder filtering box body 2 is provided with a flameless explosion venting device 22.

Specifically, the bottom of the electrostatic spraying box 1 is provided with a powder recovery groove 122, and the powder recovery groove 122 is located at the paint spraying portion 12.

Example 1

In this embodiment, in order to solve the problem that more powder coating remains in the air after electrostatic powder spraying, to implement filtering of electrostatic powder spraying, the present embodiment provides a filtering device for powder spraying equipment, where an electrostatic spraying box, a powder filtering box and an exhaust fan are provided; an electrostatic filtering part and a paint spraying part are arranged in the electrostatic spraying box body, the paint spraying part is used for placing a workpiece to be sprayed with static electricity, and an anti-static filter cylinder is arranged in the electrostatic filtering part; the inside of powder filtration box is equipped with tectorial membrane filter cartridge, and antistatic filter cartridge's one end and powder filtration box intercommunication, the exhaust opening of air exhauster and tectorial membrane filter cartridge's one end intercommunication.

In this embodiment, the principle of the filtering device for the powder spraying device is as follows: when the electrostatic powder spraying is required to be filtered, firstly placing a workpiece to be sprayed with static electricity on a coating spraying part, then carrying out electrostatic powder spraying on the workpiece, wherein gas in an electrostatic spraying box body is provided with a large amount of powder coating in the spraying process, starting an exhaust fan, communicating an exhaust opening of the exhaust fan with one end of a coated filter cylinder, enabling the interior of the powder filtering box body to form negative pressure, simultaneously communicating one end of an antistatic filter cylinder with the powder filtering box body, and enabling the gas to enter the powder filtering box body after being filtered for the first time by the antistatic filter cylinder from the electrostatic filtering part, leaving a part of powder coating on the surface of the antistatic filter cylinder, and leaving the residual powder coating in the gas on the surface of the coated filter cylinder after being filtered by the second time of the coated filter cylinder of the powder filtering box body, and extracting the filtered gas outside the device by the exhaust fan.

Example two

In this embodiment, in order to specifically describe how the above powder filtration tank prevents the occurrence of blocking, a further description is made in this example, specifically, a pulse powder removal tank is provided at the top of the powder filtration tank, and an exhaust air discharge tank is provided at the top of the pulse powder removal tank; the top of the pulse powder removing box body is provided with an air outlet, the bottom of the pulse powder removing box body is provided with an air inlet, the air inlet of the pulse powder removing box body corresponds to the port of the film filter cylinder, the inside of the pulse powder removing box body is provided with a pulse dust remover, and the air blowing opening of the pulse dust remover corresponds to the air inlet of the pulse powder removing box body.

In this embodiment, the working principle of the pulse powder removing box body is as follows: when the electrostatic powder filter device is filtering, after the powder coating in the middle of the filtering gas is filtered by the tectorial membrane filter cylinder in the powder filter box, the powder coating is adhered to the surface of the tectorial membrane filter cylinder, if the powder coating on the surface of the tectorial membrane filter cylinder is filtered for a long time but not removed, the filter holes on the tectorial membrane filter cylinder can be easily blocked, the filtering effect is influenced, the pulse dust collector of the pulse powder removal box is started when the tectorial membrane filter cylinder is used for filtering, the air blowing port of the pulse dust collector corresponds to the air inlet of the pulse powder removal box, compressed air is blown to one end of the tectorial membrane filter cylinder, the powder coating on the tectorial membrane filter cylinder is blown off, and the smooth filter holes on the tectorial membrane filter cylinder are ensured.

In this embodiment, the principle of the pulse dust collector is: the pulse dust collector is a novel high-efficiency pulse dust collector improved on the basis of the bag type dust collector, integrates the advantages of various pulse blowing dust collectors of the sub-chamber back blowing, overcomes the defects of insufficient dust cleaning strength of the sub-chamber, uneven air inlet and outlet distribution and the like, and expands the application range; when dust-containing gas enters the dust remover from the air inlet, firstly, the dust-containing gas hits the inclined plate and the baffle in the middle of the air inlet and the air outlet, the airflow is turned to flow into the ash bucket, and meanwhile, the airflow speed is slowed down, and coarse particle dust in the gas directly flows into the ash bucket due to the inertia effect, so that the effect of pre-dust collection is achieved; the air flow entering the ash bucket is folded upwards and passes through the filter bag dust with a metal framework arranged in the air flow to be trapped on the outer surface of the filter bag, the purified air enters a cleaning chamber at the upper part of the filter bag chamber and is collected into an air outlet to be discharged, dust accumulated on the filter bag is more and more along with the increase of time in the dust-containing air purifying process of the filter bag, the resistance of the filter bag is increased, so that the treated air volume is gradually reduced, the resistance is controlled to be within a certain range (140-170 mm water column) for normal operation, once the dust-containing air is required to be removed from the filter bag beyond the range, a pulse controller sequentially triggers each control valve to open a pulse valve when the dust is removed, the compressed air in the air bag is sprayed into each corresponding filter bag through a venturi tube by the holes of the jetting tube, the filter bag is rapidly expanded in an instant, the dust accumulated on the surface of the filter bag falls off, and the filter bag is restored to an initial state; the cleaned dust falls into an ash bucket and is discharged out of the machine body through an ash discharging system; therefore, dust accumulated on the filter bag is periodically sprayed and blown to clean the dust, so that the purified gas normally passes through, and the operation of a dust removal system is ensured.

In addition, in order to specifically describe how the above-mentioned filtering device is used for diffusing, decelerating and discharging gas, this example further describes that, specifically, the exhaust fan is fixed in the interior of the exhaust fan discharging box body, wherein, the exhaust fan includes a volute and a centrifugal pump, the exhaust opening of the volute is communicated with the air outlet of the pulse powder removing box body, and the blades of the centrifugal pump are arranged in the volute.

In this embodiment, the principle of the volute is: the volute collects the gas behind the diffuser or behind the impeller of the centrifugal pump, and transmits the gas to the outside of the compressor, so that the gas flows to a gas conveying pipeline or flows into a cooler for cooling; in addition, in the process of collecting gas, the flow is also subjected to certain speed-reducing diffusion effect due to the gradual increase of the outer diameter of the scroll chamber and the gradual expansion of the through flow section.

Meanwhile, in order to specifically describe how the powder recovery box recovers the filtered powder coating, the embodiment also provides further description, specifically, the bottom of the powder recovery box is provided with a powder recovery box, the top of the powder recovery box is communicated with the bottom of the powder recovery box, and the powder recovery box is used for storing dust falling off from the film-coated filter cylinder; the bottom of the powder recovery box body is provided with an electric ash discharging valve, an ash inlet of the electric ash discharging valve is communicated with the bottom of the powder recovery box body, and an ash outlet of the electric ash discharging valve is arranged outside the powder recovery box body.

For example, after the powder coating on the surface of the film-coated filter cylinder is blown down by the pulse dust remover of the pulse powder removing box body, the powder coating falls on the bottom of the powder recycling box body due to the fact that the top of the powder recycling box body is communicated with the bottom of the powder filtering box body, then enters the ash inlet of the electric ash discharging valve, discharges the powder coating through the ash outlet of the electric ash discharging valve, and then collects the discharged powder coating, so that the powder coating is recycled.

In order to recover the powder paint in the electrostatic spraying box, a powder recovery groove is also formed in the bottom of the electrostatic spraying box, and the powder recovery groove is located in the paint spraying portion.

For example, after the electrostatic powder spraying is performed, a large amount of powder coating is left on the inner wall of the electrostatic spraying box body and the surface of the antistatic filter cylinder, the powder coating on the inner wall of the electrostatic spraying box body and the surface of the antistatic filter cylinder is manually swept down onto the bottom surface of the electrostatic spraying box body, then the powder coating is swept into the powder recovery groove, the powder coating is concentrated, and the recovery of a part of the powder coating can be realized.

In the embodiment, the film-coated filter cartridge specifically adopts a Teflon (polytetrafluoroethylene) film-coated filter cartridge, and the Teflon high-performance special coating is a fluorine coating taking polytetrafluoroethylene as matrix resin, combines heat resistance, chemical inertness, excellent insulation stability and low friction, has the comprehensive advantage that other coatings cannot resist, and can be applied to products with almost all shapes and sizes due to the flexibility of application; the purifier adopts a high-efficiency filter cartridge as a filter element, wherein the filter material selected by the filter cartridge is different from the common traditional filter material, and a polytetrafluoroethylene film is attached to the surface of the filter cartridge; the fiber gap of the traditional filter material (such as cotton cloth, cotton satin, paper, other traditional celluloses and the like) is 5-60 um, and when the smoke passes through, a part of dust particles in the smoke can enter the filter material to block the filter element; when the blocking condition is gradually worsened and effective ash removal cannot be performed, the air resistance of the filter element can rise, and the air flow capable of passing through can also fall; if the automatic ash removal is not carried out, the filtering effect can be rapidly reduced, and a polytetrafluoroethylene film is attached to the surface of a filtering material adopted by the series of purifiers, and most submicron dust particles can be blocked by the tiny sieve holes of the polytetrafluoroethylene film; submicron dust particles are gathered on the surface of the filter material and form a permeable dust cake, most of the dust particles are blocked on the outer surface of the filter material and cannot enter the filter material, and the dust particles can be timely and effectively removed under the blowing of compressed air; the filter material has quite high filtering efficiency, which is at least improved by more than 3-5 times compared with the traditional filter material, and the filtering efficiency of smoke dust with the diameter of more than or equal to 0.1 μm is more than or equal to 99.99%; and the service life is prolonged by more than 2 times compared with the traditional filter material.

Example III

In this embodiment, in order to specifically describe how the above-mentioned electrostatic powder spraying and filtering device is configured to perform gas communication between the respective cases, this example further describes that the electrostatic powder spraying and filtering device further includes a powder suction pipe, a first port of the powder suction pipe is communicated with the powder filtering case, a second port of the powder suction pipe is communicated with the electrostatic spraying case, a communicating position of the electrostatic spraying case is located at the electrostatic filtering portion, and a port of the electrostatic prevention filter cartridge is aligned with the communicating position of the electrostatic spraying case; the air exhaust pipeline is communicated with the air exhaust and discharge box body through a connecting pipeline, and the port of the connecting pipeline is aligned with an air outlet of the air exhaust and discharge box body.

For example, after the exhaust fan is started, the electrostatic spraying box body and the powder filtering box body are communicated through the powder suction pipeline, so that the pulse powder removing box body, the powder filtering box body and the electrostatic spraying box body are all in a negative pressure state, gas is sucked from the electrostatic filtering part of the electrostatic spraying box body, is filtered for the first time through the anti-static filter cylinder, then passes through the powder suction pipeline and then enters the powder filtering box body, and after being filtered through the film coating filter cylinder, the filtered gas enters the pulse powder removing box body again and then is discharged from the exhaust pipe from the exhaust box body, enters the exhaust pipeline from the connecting pipe, and is discharged outside through the exhaust pipeline.

Example IV

In this embodiment, in order to specifically describe how to prevent dust explosion, and improve the safety of the filtering device, a further description is made in this example, specifically, a unidirectional explosion-proof valve is arranged in the middle of the powder suction pipeline; the side wall of the powder filtering box body is provided with a flameless explosion venting device.

The dust explosion refers to dust cloud formed by mixing combustible dust with air in a limited space, and the formed dust-air mixture burns rapidly under the action of an ignition source and causes chemical reaction of temperature and pressure rapid rise; the generation of dust explosion easily damages electrostatic powder spraying equipment, and even can cause physical injury to processing workers; when the powder filtering box body is subjected to dust explosion, shock waves generated by the dust explosion spread along the powder suction pipeline, and the back pressure valve clack of the one-way explosion-proof valve in the powder suction pipeline can be rapidly closed due to the reverse flow of gas, and the air-saving knife is tightly closed on the inclined end surface of the inlet side, so that the propagation of the shock waves is prevented, the isolation effect is achieved, and equipment and personnel in the electrostatic spraying box body are effectively protected; meanwhile, when the powder filter box body of the flameless explosion venting device is subjected to dust explosion, the explosion-proof plate reacts to the rapid increase of the explosion pressure, and the flameless explosion venting device is immediately opened to reduce the pressure. When the expanded fireball passes through the opened explosion-proof plate, the fireball is intercepted by the fire extinguishing module; the stainless steel precise net wire supported by the frame plays a role in capturing three-dimensional flame and extinguishes the flame; the fire suppression module eliminates deflagrating flames, reduces hot gas temperatures, and captures combustion and unburned dust through the open explosion proof panel.

The aspects of the present utility model have been described in detail hereinabove with reference to the accompanying drawings. In the foregoing embodiments, the descriptions of the embodiments are focused on, and for those portions of one embodiment that are not described in detail, reference may be made to the related descriptions of other embodiments. Those skilled in the art will also appreciate that the acts and modules referred to in the specification are not necessarily required for the present utility model. In addition, it can be understood that the steps in the method of the embodiment of the present utility model may be sequentially adjusted, combined and pruned according to actual needs, and the structure in the apparatus of the embodiment of the present utility model may be combined, divided and pruned according to actual needs.

The foregoing description of embodiments of the utility model has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. An electrostatic powder spray filtration device comprising:

the electrostatic spraying device comprises an electrostatic spraying box body, a powder filtering box body and an exhaust fan;

the electrostatic spraying box body is internally provided with an electrostatic filtering part and a coating spraying part, the coating spraying part is used for placing a workpiece to be sprayed with static electricity, and the electrostatic filtering part is provided with an anti-electrostatic filter cylinder;

the powder filter box is characterized in that a film-coated filter cylinder is arranged in the powder filter box body, one end of the anti-static filter cylinder is communicated with the powder filter box body, and an exhaust opening of the exhaust fan is communicated with one end of the film-coated filter cylinder.

2. The electrostatic powder spraying and filtering device according to claim 1, wherein a pulse powder removing box body is arranged at the top of the powder filtering box body, and an air draft discharging box body is arranged at the top of the pulse powder removing box body;

the pulse powder removing box comprises a pulse powder removing box body and is characterized in that an air outlet is formed in the top of the pulse powder removing box body, an air inlet is formed in the bottom of the pulse powder removing box body, the air inlet of the pulse powder removing box body corresponds to a port of the film-covered filter cylinder, a pulse dust remover is arranged in the pulse powder removing box body, and an air blowing opening of the pulse dust remover corresponds to the air inlet of the pulse powder removing box body.

3. The electrostatic powder spraying and filtering device according to claim 1, wherein a powder recovery box is arranged at the bottom of the powder filtering box, the top of the powder recovery box is communicated with the bottom of the powder filtering box, and the powder recovery box is used for storing dust falling off from the film-coated filter cylinder.

4. The electrostatic powder spray filtration device of claim 2, wherein the suction fan is fixed inside the suction fan discharge box, wherein the suction fan comprises a volute and a centrifugal pump, the suction opening of the volute is communicated with the air outlet of the pulse powder removal box, and the blades of the centrifugal pump are arranged inside the volute.

5. An electrostatic powder spraying and filtering device according to claim 3, wherein an electric ash discharging valve is arranged at the bottom of the powder recycling box body, an ash inlet of the electric ash discharging valve is communicated with the bottom of the powder recycling box body, and an ash outlet of the electric ash discharging valve is arranged outside the powder recycling box body.

6. An electrostatic powder spray filtration device according to claim 1, further comprising a powder suction conduit, a first port of the powder suction conduit being in communication with the powder filtration tank, a second port of the powder suction conduit being in communication with the electrostatic spray tank, and a communication of the electrostatic spray tank being in the electrostatic filtration section, a port of the antistatic filter cartridge being aligned with the communication of the electrostatic spray tank.

7. An electrostatic powder spray filtration device according to claim 2, further comprising an exhaust duct, the exhaust duct communicating with the exhaust extraction housing via a connecting duct, and a port of the connecting duct being aligned with an exhaust outlet of the exhaust extraction housing.

8. An electrostatic powder spray filtration device according to claim 6, wherein the middle of the powder suction duct is provided with a one-way flameproof valve.

9. An electrostatic powder spray filtration device according to claim 2, wherein the side wall of the powder filtration housing is provided with a flameless explosion venting means.

10. An electrostatic powder spray filtration device according to claim 1, wherein the bottom of the electrostatic spray tank is provided with a powder recovery groove, the powder recovery groove being located at the paint spray section.