A filtering device for plastic powder production and a working method thereof

Abstract

The application discloses a filtering device for plastic powder production and a working method thereof, and relates to the technical field of air filtration.The filtering device comprises a filtering box, a plurality of air inlet bins and a plurality of filtering bins are arranged in the filtering box, and one set of air inlet bins and one set of filtering bins are communicated; an equipment box is arranged on the upper side of the filtering box, a working unit is arranged in the equipment box, each working unit is communicated with one set of air inlet bins, and a separation assembly is arranged at the communication position of the working unit and the air inlet bin; a plurality of electrostatic modules are arranged in the working unit through one set of stroke assemblies; and a plurality of ventilation bases are arranged in each filtering bin. The filtering device is provided with a plurality of filtering bins which work independently, the filter screen in each filtering bin can be cleaned independently during subsequent self-cleaning, the work of the remaining filtering bins is not affected, and the filtered air of the remaining filtering bins can provide gas for the self-cleaning filtering bin.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of air filtration, in particular to a filtering device for plastic powder production and a working method thereof. BACKGROUND

[0002] In the processing of plastic powder, air is often used to assist production, including cooling, conveying, cleaning, generating friction of plastic powder, etc. When air is used, the purity of the air is crucial to the quality of the final product.

[0003] Unfiltered air often contains dust, oil mist and other small impurities. These impurities may mix with the plastic powder during processing, affecting its physical properties and purity. In addition, these impurities may accumulate in the conveying system, causing equipment blockage, increased wear or reduced production efficiency. Therefore, effective filtration of air to remove impurities not only helps to ensure the purity of plastic powder, but also prolongs the service life of equipment and improves overall production efficiency. In the prior art, filter bags, filter screens and other filtering components are often used to filter air during conveying.

[0004] Through retrieval, a self-cleaning air filter device is disclosed in Chinese patent (publication number: CN115253518B). The patent includes a filter housing, a filter plate, a plugging assembly, a rotating conversion mechanism and a air port adjusting mechanism. The filter plate has a filtering position and a cleaning position. When the filter plate is in the cleaning position, air cleans the filter screen holes. The rotating conversion mechanism is fixedly connected with the filter plate. The air port adjusting mechanism is used to adjust the size and air inlet position of the filter air duct under the driving of the rotating conversion mechanism.

[0005] In the prior art, in order to improve the filtering quality of the filtering device, the filtering structure used for filtering is usually cleaned. Among them, self-cleaning is one of the common cleaning methods. How to improve the quality and efficiency of self-cleaning is one of the research directions. Therefore, the application provides a filtering device for plastic powder production and a working method thereof. SUMMARY

[0006] The application aims to provide a filtering device for plastic powder production and a working method thereof to solve the problems mentioned in the background.

[0007] The application can be implemented by the following technical scheme: a filtering device for plastic powder production, comprising a filter box, a device box is installed on the upper side of the filter box, and a plurality of air inlet bins and a plurality of filter bins are formed in the inside of the filter box, each air inlet bin is in communication with a group of filter bins;

[0008] The side of the filter box is provided with a plurality of air inlet pipes, each air inlet pipe is communicated with a group of air inlet bins, and is used for conveying air to be filtered into the air inlet bin.

[0009] The inside of the equipment box is provided with a plurality of working units, each working unit is arranged on the upper side of each filter bin, and each working unit is communicated with the corresponding air inlet bin, and a separation assembly is arranged at the communicated position, which is used for controlling the communication between the working unit and the air inlet bin.

[0010] The inside of each filter bin is provided with a ventilation base, and a filter screen is arranged between the communicated position of the air inlet bin and the ventilation base, wherein the filter bin is provided with a space outside the filter screen, which is used for the filtered air to flow out, and the ventilation base is provided with an air outlet, which is used for the filtered air to flow to the lower side of the ventilation base.

[0011] The inside of the filter box is provided with a communication pipe on one side of each filter bin, the communication pipe is communicated with each filter bin, and the communicated position of the communication pipe and each filter bin is located on the lower side of the ventilation base in the corresponding filter bin.

[0012] The side of the communication pipe is provided with at least one group of ventilation pipes, which are used for guiding the filtered air from the communication pipe to the required equipment or process.

[0013] The bottom of each filter bin is provided with a lifting cylinder, the output end of each lifting cylinder faces upward, and a backflush frame is arranged, the side wall of the backflush frame is attached to the filter bin, and the lifting cylinder drives the backflush frame to move to the bottom of the ventilation base along the filter bin after being started, and the backflush frame blocks the communicated position of the corresponding ventilation base and the communication pipe after moving to the lower side of the ventilation base.

[0014] A backflush pipe is arranged between each backflush frame and the communication pipe, a control valve is arranged in each backflush pipe, which is used for controlling the path communication state of the backflush pipe, and the backflush frame is communicated with the communication pipe through the corresponding backflush pipe when the backflush pipe is in the communication state.

[0015] A stroke assembly is arranged in each working unit, and the output end of each stroke assembly is provided with an electrostatic module.

[0016] The stroke assembly moves the electrostatic module to one side of the corresponding filter screen after being started, and blows the filter screen when the corresponding backflush frame moves to the lower side of the ventilation base, and the electrostatic module is started to collect the dust generated by the backflush of the filter screen, so as to facilitate subsequent processing.

[0017] Further technical improvements of the present application are that the backflush frame comprises a frame body, a connecting hole is arranged on the lower side of the frame body, and a partition plate is arranged in the frame body.

[0018] In use, the frame body abuts against the lower side of the ventilation base;

[0019] The interior of the partition plate is provided with a plurality of ventilation holes, and each ventilation hole is provided with a one-way plate rotatable upward through a reset member;

[0020] After the air is transmitted to the backflush frame through the corresponding backflush pipe, each one-way plate is turned upward through the reset member, so that the backflush frame is communicated with the filter bin.

[0021] Further technical improvement of the present application is that the electrostatic module comprises a connecting assembly connected with the output end of the corresponding stroke assembly, and the lower side of the connecting assembly is provided with a first electrostatic assembly;

[0022] In work, the stroke assembly drives the first electrostatic assembly to descend based on the connecting assembly, and the outer side of the first electrostatic assembly is an adsorption area.

[0023] Further technical improvement of the present application is that the connecting assembly adopts a motor structure, and the output end is connected with the first electrostatic assembly for driving rotation thereof;

[0024] The outer side of the first electrostatic assembly is provided with a plurality of expansion frames, each of which is provided with an air inlet end and an air outlet end, the air inlet end of each expansion frame faces the rotation direction of the first electrostatic assembly, and the air outlet end of each expansion frame faces away from the corresponding air inlet end;

[0025] The size of the air inlet end is greater than that of the air outlet end;

[0026] When the first electrostatic assembly rotates, air enters from the air inlet end of each expansion frame and is discharged from the corresponding air outlet end;

[0027] The outer side of the first electrostatic assembly is provided with a plurality of air guide blocks between each expansion frame, and each air guide block is inclined towards the side of the adjacent expansion frame away from the first electrostatic assembly;

[0028] The first electrostatic assembly is located in the expansion frame coverage area, which is an adsorption area.

[0029] Further technical improvement of the present application is that the connecting assembly adopts a motor structure, and the output end is connected with the first electrostatic assembly;

[0030] The equipment box is provided with a supply pipe and a recovery pipe on both sides respectively;

[0031] The recovery pipe is communicated with each working unit, and a control valve is installed at the communication part for controlling the communication state of each working unit with the recovery pipe;

[0032] The side of the air supply pipe towards the recovery pipe is provided with a plurality of guide pipes, each of which is embedded in a corresponding working unit, and a control valve is installed in each guide pipe to control the communication state between the guide pipe and the air supply pipe.

[0033] The air outlet direction of each guide pipe is tangent to the side of the first electrostatic component in the corresponding working unit.

[0034] After the guide pipe is communicated with the air supply pipe, the air transported by the air supply pipe flows along the guide pipe, while the connecting component in the corresponding working unit drives the first electrostatic component to rotate, the guide pipe sprays air from the side of the first electrostatic component, and the air is discharged along the recovery pipe, thereby cleaning the electrostatic module.

[0035] The further technical improvement of the present application is that the electrostatic module comprises a connecting frame connected to the output end of the stroke assembly, and a second electrostatic component is installed on the lower side of the connecting frame, and a winding mechanism is installed on both sides of the lower side of the connecting frame.

[0036] A positioning plate is installed at the bottom of the second electrostatic component, and an adsorption medium is installed between the two winding mechanisms, which passes through the positioning plate and contacts the second electrostatic component.

[0037] During operation, the positioning plate based on the second electrostatic component and the stroke assembly descends to the top of the corresponding filter bin and blocks the communication part between the filter bin and the air inlet bin, when the filter screen is back-flushed by the back-flushing frame, the second electrostatic component is started, the dust generated by the back-flushed filter screen is captured by the adsorption medium, and after a single capture, the two winding mechanisms are started to change the part of the adsorption medium inside the positioning plate.

[0038] The further technical improvement of the present application is that the positioning plate comprises a positioning frame connected to the second electrostatic component, and an opening is formed in the top of the positioning frame, and the electrostatic part of the second electrostatic component passes through the opening to contact the adsorption medium.

[0039] The further technical improvement of the present application is that the positioning frame is provided with a through hole on both sides, and a first elastic member is installed in each through hole.

[0040] The adsorption medium passes through the lower side of the first elastic member in the two through holes, and during operation, the two first elastic members press the adsorption medium on the corresponding two sides of the communication part between the filter bin and the equipment box.

[0041] At least one second elastic member is installed on the top of the positioning frame, the adsorption medium passes through the upper side of the second elastic member, and the second elastic member is used to maintain the contact quality between the adsorption medium and the electrostatic part of the second electrostatic component.

[0042] The application further discloses a working method of the filtering device for plastic powder production.

[0043] S1, each air inlet pipe sequentially conveys the air to be filtered into the filtering bin along the corresponding air inlet bin, and the air is filtered through the corresponding filter screen and then flows out from the space between the filter screen and the filtering bin, and finally is output through the ventilation pipe along the communication pipe;

[0044] S2, when the filter screen is cleaned, the control valve of the corresponding air inlet pipe is closed, the air inflow is paused, the lift cylinder in the corresponding filtering bin drives the backflush frame to ascend until the backflush frame is attached to the ventilation base, the separation assembly in the air inlet bin is opened, the working unit on the upper side of the air inlet bin is communicated, and then the stroke assembly is started to lower the electrostatic module to one side of the filter screen;

[0045] S3, the control valve in the backflush pipe is opened, the air in the communication pipe is sprayed out from the corresponding backflush frame through the backflush pipe, and the filter screen is backblown;

[0046] S4, the electrostatic module is started to adsorb the dust generated by backblowing of the filter screen, and self-cleaning is performed;

[0047] S5, after self-cleaning, the electrostatic module, the separation assembly and the backflush frame are reset, the control valve in the backflush pipe is closed, the control valve in the corresponding air inlet pipe is opened, and the filtering bin is restarted to filter the air.

[0048] Compared with the prior art, the application has the following beneficial effects:

[0049] When the application works, a plurality of filtering bins that work independently are arranged, the filter screen in each filtering bin can be cleaned individually during subsequent self-cleaning, so that the work of the remaining filtering bins is not affected, and the air filtered by the remaining filtering bins can provide gas for the self-cleaning filtering bin, and the filter screen can be prevented from being secondarily polluted during backblowing cleaning of the filter screen;

[0050] In addition, the dust or impurities generated by backblowing of the filter screen can be separated from the corresponding filtering bin and air inlet bin through the electrostatic module, and the normal filtering work of the device can not be affected during subsequent cleaning of the electrostatic module, and the applicability is better. BRIEF DESCRIPTION OF DRAWINGS

[0051] In order to facilitate understanding of those skilled in the art, the application will be further described below with reference to the drawings.

[0052] Figure 1 FIG. 1 is an external structure diagram of the application embodiment 1;

[0053] Figure 2 FIG. 2 is a side sectional view of the application embodiment 1;

[0054] Figure 3 is a bottom view of embodiment 1 of the present application;

[0055] Figure 4 is a partial perspective view of a backflush frame in the present application;

[0056] Figure 5 is a partial bottom view of an equipment box in embodiment 1 of the present application;

[0057] Figure 6 is a bottom view of a first electrostatic assembly in embodiment 2 of the present application;

[0058] Figure 7 is a partial bottom view of an electrostatic module in embodiment 3 of the present application;

[0059] Figure 8 is a side view of embodiment 4 of the present application;

[0060] Figure 9 is a side view of an equipment box in embodiment 4 of the present application;

[0061] Figure 10 is a side view of a positioning plate in embodiment 4 of the present application;

[0062] In the drawings: 1, filter box; 2, equipment box; 3, filter bin; 4, ventilation base; 5, filter screen; 6, communication pipe; 7, ventilation pipe; 8, lifting cylinder; 9, backflush frame; 10, backflush pipe; 11, stroke assembly; 12, electrostatic module; 13, air inlet bin; 14, air inlet pipe; 91, frame body; 92, connecting hole; 93, partition plate; 94, ventilation hole; 95, one-way plate; 121, first electrostatic assembly; 122, connecting assembly; 123, outwardly expanding frame; 124, air guide block; 21, recovery pipe; 22, air supply pipe; 23, guide pipe; 1211, connecting frame; 1212, second electrostatic assembly; 1213, positioning plate; 1214, winding mechanism; 1215, adsorbing medium; 1200, positioning frame; 1201, first elastic member; 1202, second elastic member. DETAILED DESCRIPTION

[0063] In order to further explain the technical means and effects adopted by the present application to achieve the predetermined purposes, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0064] Please refer to Figures 1-5 shown, the present application provides a kind of filter device for plastic powder production, including, including filter box 1, equipment box 2 is installed on the upper side of filter box 1, and multiple air inlet bins 13 and multiple filter bins 3 are set in the inside of filter box 1, each air inlet bin 13 is connected with a group of filter bin 3 respectively;

[0065] The side of the filter box 1 is provided with a plurality of air inlet pipes 14, each of which is communicated with a group of air inlet bins 13 for conveying air to be filtered into the air inlet bin 13, and each of which is provided with a control valve for controlling the flow of air;

[0066] The inside of the equipment box 2 is provided with a plurality of working units, each of which is arranged on the upper side of each filter bin 3, and each of which is communicated with the corresponding air inlet bin 13, and each of which is provided with a separation assembly at the communicated part, the separation assembly comprising a lead screw structure for driving, the output end of the lead screw structure being provided with a baffle, the lead screw structure driving the baffle to move between the communicated parts of the working units;

[0067] The inside of each filter bin 3 is provided with a ventilation base 4, and the communicated part between the air inlet bin 13 and the filter bin 3 and the ventilation base 4 is provided with a filter screen 5, wherein the filter bin 3 is provided with a space outside the filter screen 5 for the filtered air to flow out, and the ventilation base 4 is provided with an air outlet for the filtered air to flow to the lower side of the ventilation base 4;

[0068] The inside of the filter box 1 is provided with a communicated pipe 6 on one side of each filter bin 3, the communicated pipe 6 being communicated with each filter bin 3, and the communicated part between the communicated pipe 6 and each filter bin 3 being located at the lower side of the ventilation base 4 inside the corresponding filter bin 3;

[0069] The side of the communicated pipe 6 is provided with a plurality of ventilation pipes 7 for guiding the filtered air from the communicated pipe 6 to the required equipment or process;

[0070] The bottom of each filter bin 3 is provided with a lifting cylinder 8, the output end of each lifting cylinder 8 facing upward and being provided with a backflush frame 9, the side wall of the backflush frame 9 abutting the filter bin 3, the lifting cylinder 8 driving the backflush frame 9 to move to the bottom of the ventilation base 4 along the filter bin 3, and the backflush frame 9 shielding the communicated part between the corresponding ventilation base 4 and the communicated pipe 6 after moving to the lower side of the ventilation base 4;

[0071] The backflush pipe 10 is installed between each backflush frame 9 and the communicated pipe 6, the inside of each backflush pipe 10 being provided with a control valve for controlling the path communication state of the backflush pipe 10, the backflush frame 9 being communicated with the communicated pipe 6 through the corresponding backflush pipe 10 when the backflush pipe 10 is in the communicated state;

[0072] The inside of each working unit is provided with a stroke assembly 11, the stroke assembly 11 in this embodiment adopting a lead screw structure, the output end of each stroke assembly 11 being provided with an electrostatic module 12;

[0073] After the stroke assembly 11 is started, the electrostatic module 12 is moved to one side of the corresponding filter screen 5, and after the corresponding backflush frame 9 is moved to the lower side of the ventilation base 4, the filter screen 5 is backflushed, and at the same time, the electrostatic module 12 is started to collect the dust generated by backflushing the filter screen 5, so as to facilitate subsequent processing.

[0074] As shown in Figure 4 The backflush frame 9 comprises a frame body 91, and the lower side of the frame body 91 is provided with a connecting hole 92, and the inside of the frame body 91 is provided with a partition plate 93;

[0075] In use, the frame body 91 abuts against the lower side of the ventilation base 4;

[0076] The inside of the partition plate 93 is provided with a plurality of ventilation holes 94, and the inside of each ventilation hole 94 is provided with a one-way plate 95 which can rotate upward through a reset member, the reset member adopts a torsional spring structure, and the lower side of each ventilation hole 94 which is located at the corresponding one-way plate 95 is provided with a limiting structure;

[0077] After the corresponding backflush pipe 10 transmits air into the backflush frame 9, each one-way plate 95 is turned upward through the reset member, so that the backflush frame 9 is communicated with the filter bin 3.

[0078] As shown in Figure 5 The electrostatic module 12 comprises a connecting assembly 122 which is connected with the output end of the corresponding stroke assembly 11, and the lower side of the connecting assembly 122 is provided with a first electrostatic assembly 121;

[0079] In work, the stroke assembly 11 drives the first electrostatic assembly 121 to descend based on the connecting assembly 122, and the outer side of the first electrostatic assembly 121 is an adsorption area.

[0080] The application also provides a working method of the filtering device for plastic powder production, which comprises the following steps:

[0081] Each air inlet pipe 14 sequentially transmits the air to be filtered into the filter bin 3 along the corresponding air inlet bin 13, and after being filtered by the corresponding filter screen 5, the air flows out from the space between the filter screen 5 and the filter bin 3, and finally is output along the communication pipe 6 through the ventilation pipe 7;

[0082] When the filter screen 5 is cleaned, the control valve of the corresponding air inlet pipe 14 is closed, the air inflow is paused, and the backflush frame 9 in the corresponding filter bin 3 is driven to ascend by the lifting cylinder 8 until it is attached to the ventilation base 4, the separating assembly in the corresponding air inlet bin 13 is opened, the working unit on the upper side of the air inlet bin 13 is communicated, and then the stroke assembly 11 is started to lower the electrostatic module 12 into the inside of the filter screen 5;

[0083] The control valve in the backflush pipe 10 is opened, and the air in the communication pipe 6 is sprayed out of the corresponding backflush frame 9 along the backflush pipe 10, and the filter screen 5 is backblown;

[0084] The electrostatic module 12 is started, the dust generated by the backblowing of the filter screen 5 is adsorbed, and self-cleaning is performed;

[0085] After self-cleaning, the electrostatic module 12, the separation assembly, and the backflush frame 9 are reset, the control valve in the backflush pipe 10 is closed, the corresponding control valve in the air inlet pipe 14 is opened, and the filter bin 3 is restarted to filter the air;

[0086] In subsequent cleaning, the outside of each electrostatic module 12 can be cleaned by the worker.

[0087] Embodiment 2

[0088] A filter device for plastic powder production, comprising a filter box 1, a device box 2 is installed on the upper side of the filter box 1, and a plurality of air inlet bins 13 and a plurality of filter bins 3 are formed in the inside of the filter box 1, and each air inlet bin 13 is communicated with a group of filter bins 3;

[0089] A plurality of air inlet pipes 14 are installed on the side of the filter box 1, and each air inlet pipe 14 is communicated with a group of air inlet bins 13;

[0090] A plurality of working units are formed in the inside of the device box 2, each working unit is arranged on the upper side of each filter bin 3, each working unit is communicated with the corresponding air inlet bin 13, and a separation assembly is installed at each communicated position;

[0091] A ventilation base 4 is installed in each filter bin 3, a filter screen 5 is installed between the communicated position of the air inlet bin 13 and the filter bin 3 and the ventilation base 4, the filter bin 3 is provided with a space outside the filter screen 5, and the ventilation base 4 is provided with an air outlet;

[0092] A communication pipe 6 is installed on one side of each filter bin 3 in the inside of the filter box 1, the communication pipe 6 is communicated with each filter bin 3, and the communicated position of the communication pipe 6 and each filter bin 3 is located on the lower side of the ventilation base 4 in the inside of the corresponding filter bin 3;

[0093] A plurality of ventilation pipes 7 are installed on the side of the communication pipe 6;

[0094] A lifting cylinder 8 is installed at the bottom of each filter bin 3, the output end of each lifting cylinder 8 faces upward, and a backflush frame 9 is installed, and the side wall of the backflush frame 9 is attached to the filter bin 3;

[0095] A backflush pipe 10 is installed between each backflush frame 9 and the communication pipe 6, and a control valve is installed in the inside of each backflush pipe 10;

[0096] The internal of each work unit is installed with a stroke assembly 11, and the output end of each stroke assembly 11 is installed with an electrostatic module 12.

[0097] The electrostatic module 12 comprises a connecting assembly 122 connected with the output end of the corresponding stroke assembly 11, and the lower side of the connecting assembly 122 is installed with a first electrostatic assembly 121.

[0098] The connecting assembly 122 adopts a motor structure, and the output end is connected with the first electrostatic assembly 121, for driving the rotation thereof.

[0099] Compared with example 1, please refer to Figure 6 As shown, the outer side of the first electrostatic assembly 121 is installed with a plurality of outward expansion frames 123, each of which is provided with an air inlet end and an air outlet end, and the air inlet end of each outward expansion frame 123 faces the rotation direction of the first electrostatic assembly 121, and the air outlet end of each outward expansion frame 123 faces away from the corresponding air inlet end;

[0100] The size of the air inlet end is larger than that of the air outlet end, for facilitating the improvement of the contact quality of air and the first electrostatic assembly 121;

[0101] The outer side of the first electrostatic assembly 121 between each outward expansion frame 123 is installed with a wind guide block 124, and each wind guide block 124 is inclined towards the side of the adjacent outward expansion frame 123 away from the first electrostatic assembly 121;

[0102] The place where the first electrostatic assembly 121 is located in the coverage of the outward expansion frame 123 is the adsorption area.

[0103] Compared with example 1, the electrostatic module 12 in example 2 is driven to descend to the inside of the corresponding filter screen 5 by the stroke assembly 11 during work, and then the connecting assembly 122 is started to drive the rotation of the first electrostatic assembly 121. When the first electrostatic assembly 121 rotates, air enters from the air inlet end of each outward expansion frame 123 and is discharged from the corresponding air outlet end. After the air is discharged from the air outlet end of the outward expansion frame 123, it is guided by the wind guide block 124, enters the adjacent outward expansion frame 123, and flows to the side of the outward expansion frame 123 away from the first electrostatic assembly 121, avoiding the impact on the adsorption area of the first electrostatic assembly 121, and reducing the dust or impurity residues on the inner wall of the outward expansion frame 123.

[0104] Example 3

[0105] A filtering device for plastic powder production, comprising a filtering box 1, a device box 2 is installed on the upper side of the filtering box 1, and a plurality of air inlet bins 13 and a plurality of filtering bins 3 are formed in the inside of the filtering box 1, and each air inlet bin 13 is communicated with a group of filtering bins 3;

[0106] The side of the filter box 1 is provided with a plurality of air inlet pipes 14, each of which is in communication with a group of air inlet bins 13;

[0107] The inside of the equipment box 2 is provided with a plurality of working units, each of which is arranged on the upper side of each filter bin 3, and each working unit is in communication with the corresponding air inlet bin 13, and each communication part is provided with a separation assembly;

[0108] The inside of each filter bin 3 is provided with a ventilation base 4, and the communication part of the air inlet bin 13 and the ventilation base 4 is provided with a filter screen 5, wherein the filter bin 3 is provided with a space outside the filter screen 5, and the ventilation base 4 is provided with an air outlet;

[0109] The inside of the filter box 1 is provided with a communication pipe 6 on one side of each filter bin 3, which is in communication with each filter bin 3, and the communication part of the communication pipe 6 and each filter bin 3 is located on the lower side of the ventilation base 4 inside the corresponding filter bin 3;

[0110] The side of the communication pipe 6 is provided with a plurality of ventilation pipes 7;

[0111] The bottom of each filter bin 3 is provided with a lifting cylinder 8, the output end of each lifting cylinder 8 is upward, and a backflush frame 9 is installed, the side wall of the backflush frame 9 is attached to the filter bin 3;

[0112] Each backflush frame 9 is provided with a backflush pipe 10 between the backflush frame 9 and the communication pipe 6, and the inside of each backflush pipe 10 is provided with a control valve;

[0113] The inside of each working unit is provided with a stroke assembly 11, and the output end of each stroke assembly 11 is provided with an electrostatic module 12;

[0114] The electrostatic module 12 comprises a connecting assembly 122 connected to the output end of the corresponding stroke assembly 11, and the lower side of the connecting assembly 122 is provided with a first electrostatic assembly 121.

[0115] Please refer to Figure 7 The connecting assembly 122 adopts a motor structure, and the output end is connected to the first electrostatic assembly 121;

[0116] The two sides of the equipment box 2 are respectively provided with a supply air pipe 22 and a recovery pipe 21;

[0117] The recovery pipe 21 is in communication with each working unit, and the communication part is provided with a control valve for controlling the communication state of each working unit and the recovery pipe 21;

[0118] The air supply pipe 22 is provided with a plurality of guide pipes 23 on the side facing the recovery pipe 21, each guide pipe 23 is embedded in a corresponding working unit, and a control valve is installed in the interior of each guide pipe 23 for controlling the communication state between the guide pipe 23 and the air supply pipe 22.

[0119] The air outlet direction of each guide pipe 23 is tangent to the side of the first electrostatic assembly 121 in the corresponding working unit.

[0120] Compared with embodiment 1, when the electrostatic module 12 needs to be cleaned, the guide pipe 23 is first communicated with the air supply pipe 22, the air transported by the air supply pipe 22 flows along the guide pipe 23 and contacts the side of the first electrostatic assembly 121 in the electrostatic module 12, at the same time, the connecting assembly 122 in the corresponding working unit drives the first electrostatic assembly 121 to rotate, and after the air is sprayed from the side of the first electrostatic assembly 121, it is discharged along the recovery pipe 21, thereby cleaning the electrostatic module 12.

[0121] Embodiment 4

[0122] Please refer to Figures 8-10 As shown in the figure, a filtering device for plastic powder production includes a filtering box 1, an equipment box 2 is installed on the upper side of the filtering box 1, and a plurality of air inlet compartments 13 and a plurality of filtering compartments 3 are formed in the interior of the filtering box 1, each air inlet compartment 13 is in communication with a group of filtering compartments 3;

[0123] A plurality of air inlet pipes 14 are installed on the side of the filtering box 1, each air inlet pipe 14 is in communication with a group of air inlet compartments 13;

[0124] A plurality of working units are formed in the interior of the equipment box 2, each working unit is arranged on the upper side of each filtering compartment 3, each working unit is in communication with a corresponding air inlet compartment 13, and a partition assembly is installed at each communication position;

[0125] A ventilation base 4 is installed in the interior of each filtering compartment 3, a filter screen 5 is installed between the communication position of the air inlet compartment 13 and the filtering compartment 3 and the ventilation base 4, the filtering compartment 3 is provided with a space outside the filter screen 5, and the ventilation base 4 is provided with an air outlet;

[0126] A communication pipe 6 is installed on one side of each filtering compartment 3 in the interior of the filtering box 1, the communication pipe 6 is in communication with each filtering compartment 3, and the communication position of the communication pipe 6 with each filtering compartment 3 is located on the lower side of the ventilation base 4 in the interior of the corresponding filtering compartment 3;

[0127] A plurality of ventilation pipes 7 are installed on the side of the communication pipe 6;

[0128] A lifting cylinder 8 is installed at the bottom of each filtering compartment 3, the output end of each lifting cylinder 8 faces upward, and a backflush frame 9 is installed, the side wall of the backflush frame 9 is attached to the filtering compartment 3;

[0129] A backflush pipe 10 is installed between each backflush frame 9 and the communication pipe 6, and a control valve is installed inside each backflush pipe 10;

[0130] A stroke assembly 11 is installed inside each working unit, and an electrostatic module 12 is installed at the output end of each stroke assembly 11;

[0131] The electrostatic module 12 comprises a connecting frame 1211 connected to the output end of the stroke assembly 11, and a second electrostatic assembly 1212 is installed on the lower side of the connecting frame 1211, and two winding mechanisms 1214 are installed on both sides of the lower side of the connecting frame 1211 and located at the two sides of the second electrostatic assembly 1212;

[0132] A positioning plate 1213 is installed at the bottom of the second electrostatic assembly 1212, and an adsorbing medium 1215 is installed between the two winding mechanisms 1214, which passes through the positioning plate 1213 and contacts the second electrostatic assembly 1212;

[0133] In this embodiment, the adsorbing medium 1215 is a fiber cloth, and the two ends of the fiber cloth are wound outside the output sites of the two winding mechanisms 1214.

[0134] The positioning plate 1213 comprises a positioning frame 1200 connected to the second electrostatic assembly 1212, and an opening is formed at the top of the positioning frame 1200, and the electrostatic part of the second electrostatic assembly 1212 passes through the opening to contact the adsorbing medium 1215.

[0135] Through holes are formed at both sides of the positioning frame 1200, and a first elastic member 1201 is installed in each through hole, and a second elastic member 1202 is installed at the top of the positioning frame 1200;

[0136] The adsorbing medium 1215 passes through the lower side of the first elastic member 1201 in the two through holes and passes through the upper side of the second elastic member 1202, and the second elastic member 1202 is used to maintain the contact quality between the adsorbing medium 1215 and the electrostatic part of the second electrostatic assembly 1212.

[0137] Compared with Embodiment 1, during operation, the positioning plate 1213 based on the second electrostatic assembly 1212 and the stroke assembly 11 is lowered to the top of the corresponding filter bin 3, and the communication part between the filter bin 3 and the air inlet bin 13 is shielded;

[0138] The two first elastic members 1201 press the adsorbing medium 1215 on the corresponding two sides of the communication part between the filter bin 3 and the equipment box 2;

[0139] When the back-flushing frame 9 back-flushes the filter screen 5, the dust or impurities generated by the filter screen 5 are blown to the adsorption medium 1215, and the second electrostatic assembly 1212 is started to capture the dust generated by the back-flushing of the filter screen 5 through the adsorption medium 1215;

[0140] After use, the two groups of winding mechanisms 1214 are started to move the adsorption medium 1215 along the respective first elastic members 1201 and second elastic members 1202, and move the new area to the inside of the positioning plate 1213.

[0141] The above is only the preferred embodiment of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed above with the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the technical solution of the present application, still belongs to the scope of the technical solution of the present application.

Claims

1. A filter device for plastic powder production, characterized in that, The utility model provides filter box (1) inside is provided with multiple air inlet bin (13) and multiple filter bin (3), and a group of air inlet bin (13) and a group of filter bin (3) are communicated, Equipment box (2) is arranged at the upper side of filter box (1), and the inside of equipment box (2) is provided with working unit, each working unit is communicated with a group of air inlet bin (13) respectively, and the communication part of working unit and air inlet bin (13) is all installed with separation assembly, Multiple electrostatic modules (12) are respectively installed in each working unit through a group of stroke assemblies (11), Multiple ventilation bases (4) are respectively installed in each filter bin (3), and the ventilation base (4) is provided with an air outlet, Multiple filter screens (5) are respectively installed in each filter bin (3), and are arranged between the communication part of ventilation base (4) and filter bin (3) and air inlet bin (13), and a space is arranged between filter screen (5) and filter bin (3), The communication pipe (6) is arranged in the filter box (1) and is communicated with each filter bin (3), and the part of the communication pipe (6) and each filter bin (3) is communicated is located at the lower side of the ventilation base (4) in it, The lifting cylinder (8) is installed at the bottom of filter bin (3), and the top is installed with backflush frame (9), Each backflush frame (9) and communication pipe (6) are all installed with backflush pipe (10), After the backflush frame (9) is lifted based on the lifting cylinder (8), abuts at the lower side of corresponding ventilation base (4), and shields the connecting part of corresponding filter bin (3) and communication pipe (6), The backflush frame (9) includes frame body (91), the lower side of frame body (91) is provided with connecting hole (92), and the inside of frame body (91) is installed with baffle (93), Multiple air vents (94) are arranged in the inside of baffle (93), and the inside of each air vent (94) is installed with one-way plate (95) through reset piece, The electrostatic module (12) includes connecting assembly (122), The connecting assembly (122) is connected with the output end of corresponding stroke assembly (11), and the lower side of connecting assembly (122) is installed with first electrostatic assembly (121), The connecting assembly (122) adopts motor structure, and the output end is connected with first electrostatic assembly (121), Multiple outer expansion frames (123) are installed on the outside of first electrostatic assembly (121), and each outer expansion frame (123) is provided with air inlet end and air outlet end, The air inlet end of each outer expansion frame (123) faces the rotation direction of first electrostatic assembly (121), and the air outlet end of each outer expansion frame (123) faces away from the corresponding air inlet end, The size of air inlet end is greater than the size of air outlet end, The place where first electrostatic assembly (121) is located in the coverage of outer expansion frame (123) is adsorption area. The guide block (124) is installed between each outer expansion frame (123) on the outside of first electrostatic assembly (121), and each guide block (124) is inclined to the side of adjacent outer expansion frame (123) away from first electrostatic assembly (121).

2. The filtering device for plastic powder production according to claim 1, characterized in that, ​ 3. The filtering device for plastic powder production according to claim 1, characterized in that, The connecting assembly (122) adopts a motor structure, and an output end is connected with the first electrostatic assembly (121); The equipment box (2) is provided with a blowing pipe (22) and a recovery pipe (21) on two sides respectively; The recovery pipe (21) is communicated with each working unit; The blowing pipe (22) is provided with a plurality of guide pipes (23) on one side facing the recovery pipe (21), and each guide pipe (23) is embedded in the corresponding working unit; The air outlet direction of each guide pipe (23) is tangent to the side of the first electrostatic assembly (121) in the corresponding working unit.

4. The filtering device for plastic powder production according to claim 1, characterized in that, The electrostatic module (12) comprises a connecting frame (1211), a second electrostatic assembly (1212) is mounted on the lower side of the connecting frame (1211), and winding mechanisms (1214) are mounted on both sides of the lower side of the connecting frame (1211) and located on both sides of the second electrostatic assembly (1212); The bottom of the second electrostatic assembly (1212) is provided with a positioning plate (1213), and an adsorption medium (1215) is mounted between the two winding mechanisms (1214), the adsorption medium (1215) passes through the positioning plate (1213) and contacts the second electrostatic assembly (1212).

5. The filtering device for plastic powder production according to claim 4, characterized in that, The positioning plate (1213) comprises a positioning frame (1200), an opening is formed in the top of the positioning frame (1200), and the second electrostatic assembly (1212) passes through the opening and contacts the adsorption medium (1215).

6. The filtering device for plastic powder production according to claim 5, characterized in that, Through holes are formed in both sides of the positioning frame (1200), and first elastic members (1201) are mounted in the through holes; When the adsorption medium (1215) passes through the two through holes, it passes through the lower side of the first elastic member (1201); At least one second elastic member (1202) is mounted on the top of the positioning frame (1200), and when the adsorption medium (1215) passes through the inside of the positioning frame (1200), it passes through the upper side of the second elastic member (1202).

7. A method of operating a filter device for the production of plastic powders according to any one of claims 1 to 6, characterized in that The working method comprises the following steps: S1, each air inlet pipe (14) sequentially conveys the air to be filtered along the corresponding air inlet bin (13) to the filtering bin (3), is filtered through the corresponding filter screen (5), flows out from the space between the filter screen (5) and the filtering bin (3), and is finally output through the ventilation pipe (7) along the communication pipe (6); S2, when the filter screen (5) is cleaned, the control valve of the corresponding air inlet pipe (14) is closed, the air inflow is paused, the lifting cylinder (8) in the corresponding filtering bin (3) drives the backflush frame (9) to rise until it is attached to the ventilation base (4), the separation assembly in the corresponding air inlet bin (13) is opened, the working unit on the upper side of the air inlet bin (13) is communicated, and then the stroke assembly (11) starts to lower the electrostatic module (12) to one side of the filter screen (5); S3, the control valve in the backflush pipe (10) is opened, the air in the communication pipe (6) is sprayed from the corresponding backflush frame (9) along the backflush pipe (10), and the filter screen (5) is backblown; S4, the electrostatic module (12) is started to adsorb the dust generated by backblowing of the filter screen (5) for self-cleaning. S5, after self-cleaning, the electrostatic module (12), the separation assembly and the backflush frame (9) are reset, the control valve in the backflush pipe (10) is closed, the control valve in the corresponding air inlet pipe (14) is opened, the filter bin (3) is restarted to filter the air.

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