Automatic filter screen replacing device and air cabinet

Abstract

The utility model discloses an automatic filter screen replacing device and an air cabinet, and belongs to the technical field of filtering equipment, the device comprises a first roll shaft, a second roll shaft, a filter screen, a positioning frame, a dust collecting assembly and a purging assembly, two ends of the filter screen are respectively wound on the first roll shaft and the second roll shaft; when the filter screen is replaced, the first roller shaft or the second roller shaft drives the filter screen to sequentially pass through the positioning frame and the dust collection assembly; the air outlet end of the purging assembly faces the filter screen located in the dust collection assembly. Compared with an existing automatic filter screen replacing device, the automatic filter screen replacing device has the advantages that in the winding process, the purging assembly continuously blows high-speed airflow to the dirty filter screen, dust is collected into the dust collecting assembly, then the filtering capacity of the filter screen is recovered, the filter screen is reused, and the purpose of reducing the use cost is achieved; in addition, the automatic filter screen replacing device further has the function of detecting whether the filter screen is blocked or not in real time, and the situation that the treatment effect of air in the environment is affected due to hysteresis of manual replacement can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of filtering equipment, and particularly relates to an automatic filter screen replacement device and a wind cabinet. Background Art

[0002] In order to ensure the quality of the outgoing gas and prevent impurities from entering the wind cabinet and affecting the performance of the equipment, the fresh air inlet of the existing combined wind cabinet is usually equipped with a layer of non-woven fabric as a filter to achieve the filtering effect. However, as time goes by, the filter will be covered with a thick layer of dust and impurities, which will affect the working effect of the wind cabinet. Therefore, it is necessary to manually replace the filter with a new one to ensure the normal operation of the wind cabinet.

[0003] Currently, filter replacement is done manually. However, due to the lag in manual replacement, the filter often seriously hinders the fresh air intake efficiency before replacement, thus affecting the air quality of the environment. At the same time, the replaced filter is usually directly scrapped. If the replacement frequency is frequent, it will indirectly increase the overall cost of use. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to provide an automatic filter screen replacement device which can automatically replace the filter screen and reduce the use cost.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A filter screen automatic replacement device comprises a first roller, a second roller, a filter screen, a positioning frame, a dust collecting component and a purge component;

[0007] The two ends of the filter are respectively wound on the first roller and the second roller;

[0008] When replacing the filter, the first roller or the second roller drives the filter to pass through the positioning frame and the dust collecting assembly in sequence;

[0009] The air outlet end of the purge assembly is arranged toward the filter screen located in the dust collecting assembly.

[0010] Furthermore, roller assemblies are provided on both sides of the positioning frame and the filter screen whose moving directions are parallel to each other;

[0011] The filter screen is in conflict with the outer circumferential surface of the roller assembly.

[0012] Furthermore, a differential pressure sensor is also provided on the positioning frame;

[0013] The positioning frame is provided with an air outlet;

[0014] The filter is arranged at the air inlet end of the air outlet;

[0015] The differential pressure sensor includes two detection ends;

[0016] One of the detection ends is arranged at the air inlet end of the filter;

[0017] The other detection end is arranged at the air outlet end of the air outlet.

[0018] Further, the dust collection assembly includes a dust collection hood;

[0019] The dust collecting cover is provided with a first through hole and a second through hole;

[0020] The first through hole and the second through hole are both located on the moving path of the filter screen;

[0021] The inner wall of the first through hole and the inner wall of the second through hole are both provided with rubber sealing strips;

[0022] The rubber sealing strip is in conflict with the surface of the filter screen.

[0023] Further, the dust collecting hood also includes a filter exhaust port;

[0024] The filter screen divides the dust collecting hood into two parts;

[0025] The air outlet end and the filter exhaust port of the purge assembly are respectively located on both sides of the filter screen.

[0026] Furthermore, the dust collection assembly also includes a dust collection cylinder;

[0027] The dust collecting hood also includes a dust outlet;

[0028] The dust outlet is arranged toward the opening of the dust collecting cylinder;

[0029] The dust outlet and the filter exhaust port are both arranged on the same side of the dust collecting hood;

[0030] The dust outlet is arranged at the lowest point of the dust collecting hood;

[0031] A vent valve is provided at the dust outlet.

[0032] Further, the purge assembly comprises a compressed air purge pipe, an electric two-way valve and an air pump which are connected in sequence;

[0033] The compressed air purge pipe includes at least three purge holes;

[0034] The purge holes are evenly distributed on the compressed air purge pipe along the axial direction of the compressed air purge pipe;

[0035] The purge hole is arranged inside the dust collecting assembly;

[0036] The purge hole is arranged toward the filter screen.

[0037] Furthermore, a wind cabinet is provided, comprising a wind cabinet body and the automatic filter replacement device described above;

[0038] The wind cabinet body includes a fresh air outlet;

[0039] The automatic filter replacement device is connected to the fresh air outlet through a positioning frame;

[0040] The area of ​​the filter is larger than the opening area of ​​the fresh air outlet.

[0041] The beneficial effect of the utility model is that: the automatic filter replacement device provided by the utility model, when the filter needs to be replaced, moves the clean part of the filter from the first roller to the positioning frame through the second roller, while the dirty part of the filter also passes through the dust collecting component and is rolled up on the second roller. In the process of rolling up, the purge component will continuously blow high-speed airflow to the dirty filter, and after the dust on the dirty filter is blown off into the dust collecting component, the filter can restore its filtering capacity, thereby achieving the purpose of reuse and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 Shown is a schematic structural diagram of an automatic filter replacement device and a wind cabinet according to a specific embodiment of the utility model;

[0043] Figure 2 Shown Figure 1 A magnified view of point A;

[0044] Figure 3 Shown Figure 1 The enlarged view of point B;

[0045] Figure 4 Shown Figure 1 The enlarged view of point C;

[0046] Figure 5 Shown Figure 4 The enlarged view of D;

[0047] Figure 6 Shown is a schematic structural diagram of a compressed air purge pipe according to a specific embodiment of the utility model;

[0048] Description of labels:

[0049] 1. The first roller;

[0050] 2. The second roller;

[0051] 3. Filter;

[0052] 4. Positioning frame; 41. Roller assembly; 42. Pressure difference sensor;

[0053] 5. Dust collecting assembly; 51. Dust collecting cover; 511. Second through hole; 512. Rubber sealing strip; 513. Filter exhaust port; 514. Dust outlet; 515. Vent valve; 52. Dust collecting cylinder;

[0054] 6. Purge assembly; 61. Compressed air purge pipe; 611. Purge hole; 62. Electric two-way valve;

[0055] 7. Wind cabinet body; 71. Fresh air outlet;

[0056] 8. Controller. DETAILED DESCRIPTION

[0057] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0058] The most critical concept of the utility model is that when replacing the filter, the second roller moves the clean part of the filter from the first roller to the positioning frame, while the dirty filter also passes through the dust collecting component and is rolled up on the second roller; during the rolling process, the purge component continuously blows out high-speed airflow to the dirty filter, and after the dust is blown into the dust collecting component, the filter can restore its filtering capacity, thereby realizing the reuse of the filter and reducing costs.

[0059] Please refer to Figures 1 to 6 The automatic filter replacement device provided by the utility model comprises a first roller 1, a second roller 2, a filter 3, a positioning frame 4, a dust collecting component 5 and a purge component 6;

[0060] The two ends of the filter screen 3 are respectively wound on the first roller 1 and the second roller 2;

[0061] When replacing the filter 3, the first roller 1 or the second roller 2 drives the filter 3 to pass through the positioning frame 4 and the dust collecting assembly 5 in sequence;

[0062] The air outlet end of the purge assembly 6 is arranged toward the filter screen 3 located in the dust collecting assembly 5 .

[0063] From the above description, it can be seen that the beneficial effects of the utility model are: providing an automatic filter replacement device, when replacing the filter 3, the second roller 2 moves the clean part of the filter 3 from the first roller 1 to the positioning frame 4, and the dirty filter 3 also synchronously passes through the dust collecting component 5 and is rolled up on the second roller 2; compared with the existing automatic filter 3 replacement equipment, during the rolling process, the purge component 6 can continuously blow a high-speed airflow to the dirty filter 3, collect the dust into the dust collecting component 5, so that the filter 3 can restore its filtering capacity, and then the filter 3 can be reused to achieve the purpose of reducing the use cost.

[0064] Preferably, the first roller 1 , the second roller 2 and the positioning frame 4 are arranged in sequence along the moving direction of the filter screen 3 .

[0065] Furthermore, roller assemblies 41 are provided on both sides of the positioning frame 4 and the filter screen 3 whose moving directions are parallel to each other;

[0066] The filter screen 3 is in conflict with the outer circumferential surface of the roller assembly 41 .

[0067] From the above description, it can be known that by arranging the roller assembly 41 in the moving direction of the filter 3, the friction force during the movement of the filter 3 can be reduced, and the filter 3 and the positioning frame 4 can be prevented from rubbing against each other and damaging the filter 3, thereby affecting the normal filtering work.

[0068] Preferably, the shape of the positioning frame 4 can be changed according to the shape of the air inlet port of the air treatment equipment, and ensure that the positioning frame 4 is sealed and connected to the air inlet port of the air treatment equipment to improve the filtering effect of the air; the shape of the positioning frame 4 of this scheme is preferably rectangular.

[0069] Furthermore, a differential pressure sensor 42 is also provided on the positioning frame 4;

[0070] The positioning frame 4 is provided with an air outlet;

[0071] The filter 3 is arranged at the air inlet end of the air outlet;

[0072] The differential pressure sensor 42 includes two detection ends;

[0073] One of the detection ends is arranged at the air inlet end of the filter 3;

[0074] Another detection end is arranged at the air outlet end of the air outlet.

[0075] As can be seen from the above description, the pressure difference sensor 42 can detect the wind pressure before and after the fresh air is filtered in real time. If the difference is greater than the set value, it means that the filter 3 is clogged, so the filter 3 replacement signal is sent to the peripheral control device through the pressure difference sensor 42, and then the first roller 1 and the second roller 2 are started to replace the filter 3 in time. The air port can ensure that the gas can pass through the positioning frame 4 smoothly, and at the same time, it can facilitate the positioning frame 4 to be fixed at the air inlet port of the air handling equipment.

[0076] Further, the dust collecting assembly 5 includes a dust collecting cover 51;

[0077] The dust collecting cover 51 is provided with a first through hole and a second through hole 511;

[0078] The first through hole and the second through hole 511 are both located on the moving path of the filter screen 3;

[0079] The inner wall of the first through hole and the inner wall of the second through hole 511 are both provided with a rubber sealing strip 512;

[0080] The rubber sealing strip 512 contacts the surface of the filter screen 3 .

[0081] Preferably, the first through hole and the second through hole 511 are both bar-shaped holes, so that the filter 3 can smoothly pass through the dust collecting cover 51, while ensuring the sealing of the dust collecting cover 51, and preventing the dust from re-diffusing into the external environment from the gap between the through hole and the filter 3 during the subsequent blowing process.

[0082] From the above description, it can be seen that this design can not only ensure that the filter 3 can pass smoothly through the interior of the dust collecting hood 51, but also avoid gas leakage during the subsequent dust blowing process of the filter 3, thereby reducing the dust removal effect, which is not conducive to the recovery of the filter 3.

[0083] Further, the dust collecting hood 51 also includes a filter exhaust port 513;

[0084] The filter 3 divides the dust collecting cover 51 into two parts;

[0085] The air outlet end of the purge assembly 6 and the filter exhaust port 513 are respectively located on both sides of the filter screen 3 .

[0086] As can be seen from the above description, the dust removal work of the filter 3 usually needs to be completed in conjunction with high-pressure gas. In order to prevent the blown dust from being scattered again in the external environment, the dust hood 51 usually needs to be set to a fully enclosed form, but the dust hood 51 in a fully enclosed environment is prone to bursting under the impact of instantaneous high-pressure gas; this problem can be effectively solved by providing a filter exhaust port 513 on the dust hood 51, that is, the filter exhaust port 513 can ensure that the gas flows out of the dust hood 51 quickly, and at the same time, because the filter exhaust port 513 has a certain filtering effect, it can also effectively intercept the dust blown off the filter 3 and prevent the dust from returning to the external environment.

[0087] Furthermore, the dust collecting assembly 5 also includes a dust collecting cylinder 52;

[0088] The dust collecting hood 51 also includes a dust outlet 514;

[0089] The dust outlet 514 is arranged toward the opening of the dust collecting cylinder 52;

[0090] The dust outlet 514 and the filter exhaust port 513 are both arranged on the same side of the dust collecting hood 51;

[0091] The dust outlet 514 is arranged at the lowest point of the dust collecting hood 51;

[0092] A vent valve 515 is provided at the dust outlet 514 .

[0093] From the above description, it can be seen that when the dust hood 51 is full of dust, the vent valve 515 is opened, and the dust in the dust hood 51 can fall into the dust collecting cylinder 52 along the dust outlet 514, thereby realizing automatic cleaning of the dust hood 51 and avoiding the dust hood 51 being too full and affecting the recovery effect of the filter 3.

[0094] Further, the purge assembly 6 includes a compressed air purge pipe 61, an electric two-way valve 62 and an air pump which are connected in sequence;

[0095] The compressed air purge pipe 61 includes at least three purge holes 611;

[0096] The purge holes 611 are evenly distributed on the compressed air purge pipe 61 along the axial direction of the compressed air purge pipe 61;

[0097] The purge hole 611 is disposed inside the dust collecting assembly 5;

[0098] The purge hole 611 is arranged toward the filter screen 3 .

[0099] As can be seen from the above description, the design makes specific improvements to the structure of the purge assembly 6, thereby ensuring that the purge assembly 6 can effectively remove dust on the surface of the filter screen 3, thereby providing a guarantee for the filter screen 3 to be reusable.

[0100] Furthermore, the above-mentioned automatic filter replacement device also includes a controller 8;

[0101] The differential pressure sensor 42 , the vent valve 515 and the electric two-way valve 62 are all electrically connected to the controller 8 .

[0102] As can be seen from the above description, the controller 8 can be any commercially available programmable logic controller 8, such as a PLC; through the controller 8, the staff can adjust the opening conditions of the differential pressure sensor 42, the vent valve 515 and the electric two-way valve 62, as well as related parameters such as the start-up sequence according to actual needs, thereby ensuring the working stability of the automatic filter replacement device.

[0103] Furthermore, the filter screen 3 is an integrated roll material, and the filter screen 3 can be any commercially available material with dense pores, such as non-woven fabric, glass fiber or synthetic fiber filter screen.

[0104] The utility model also provides a wind cabinet, comprising a wind cabinet body 7 and any one of the above-mentioned automatic filter replacement devices;

[0105] The wind cabinet body 7 includes a fresh air outlet 71;

[0106] The filter automatic replacement device is connected to the fresh air outlet 71 through the positioning frame 4;

[0107] The area of ​​the filter 3 is larger than the opening area of ​​the fresh air outlet 71 .

[0108] Specifically, the first roller 1 , the second roller 2 , the dust collecting assembly 5 and the purge assembly 6 can all be directly connected to the shell of the wind cabinet body 7 .

[0109] From the above description, it can be seen that the positioning frame 4 provides structural support for the automatic filter replacement device to be quickly disassembled and assembled with the wind cabinet body 7. When the automatic filter replacement device needs to be repaired later, this design can significantly improve the overall inspection and disassembly effect.

[0110] The automatic filter replacement device of the utility model can be used for air intake dust removal of various air handling equipment, and is particularly suitable for air intake dust removal of wind cabinets.

[0111] Please refer to Figures 1 to 6 , Embodiment 1 of the present utility model is:

[0112] A filter automatic replacement device comprises a first roller 1, a second roller 2, a filter 3, a positioning frame 4, a dust collecting assembly 5, a purge assembly 6 and a controller 8; the two ends of the filter 3 are respectively wound on the first roller 1 and the second roller 2; when the filter 3 is replaced, the first roller 1 or the second roller 2 drives the filter 3 to pass through the positioning frame 4 and the dust collecting assembly 5 in sequence; the air outlet end of the purge assembly 6 is arranged toward the filter 3 located in the dust collecting assembly 5.

[0113] A differential pressure sensor 42 is provided on the positioning frame 4, and roller assemblies 41 are provided on both sides of the positioning frame 4 and the filter 3 whose moving directions are parallel to each other; the filter 3 is in conflict with the outer circumferential surface of the roller assembly 41; the positioning frame 4 is provided with an air port; the filter 3 is arranged at the air inlet end of the air port; the differential pressure sensor 42 includes two detection ends; one of the detection ends is arranged at the air inlet end of the filter 3; and the other detection end is arranged at the air outlet end of the air port.

[0114] The dust collecting assembly 5 includes a dust collecting hood 51 and a dust collecting barrel 52; the dust collecting hood 51 is provided with a first through hole, a second through hole 511, a filter exhaust port 513 and a dust outlet 514; the first through hole 511 and the second through hole 511 are both located on the moving path of the filter 3; the inner wall of the first through hole and the inner wall of the second through hole 511 are both provided with a rubber sealing strip 512; the rubber sealing strip 512 is in conflict with the surface of the filter 3; the filter 3 divides the dust collecting hood 51 into two parts; the air outlet end and the filter exhaust port 513 of the purge assembly 6 are respectively located on both sides of the filter 3; the dust outlet 514 is arranged toward the opening of the dust collecting barrel 52; the dust outlet 514 and the filter exhaust port 513 are both arranged on the same side of the dust collecting hood 51; the dust outlet 514 is arranged at the lowest point of the dust collecting hood 51; and a vent valve 515 is arranged at the dust outlet 514.

[0115] The purge assembly 6 includes a compressed air purge pipe 61, an electric two-way valve 62 and an air pump which are connected in sequence; the compressed air purge pipe 61 includes sixteen purge holes 611; the purge holes 611 are evenly distributed on the compressed air purge pipe 61 along the axial direction of the compressed air purge pipe 61; the purge holes 611 are arranged inside the dust collecting assembly 5; the purge holes 611 are arranged toward the filter 3.

[0116] The first roller 1 , the second roller 2 , the differential pressure sensor 42 , the vent valve 515 and the electric two-way valve 62 are all electrically connected to the controller 8 .

[0117] Embodiment 2 of the present utility model is:

[0118] A wind cabinet comprises a wind cabinet body 7 and an automatic filter replacement device; the wind cabinet body 7 comprises a fresh air outlet 71; the automatic filter replacement device is connected to the fresh air outlet 71 through a positioning frame 4; the area of ​​the filter 3 is larger than the opening area of ​​the fresh air outlet 71.

[0119] The working principle of the utility model is as follows: when the pressure difference sensor 42 detects that the wind pressure difference before and after the fresh air filtration is greater than the set value, a filter replacement signal is sent to the controller 8, and then a start signal is sent to the first roller 1 and the second roller 2 respectively to roll up the old filter 3, and re-cover the new filter 3 at the fresh air inlet 71 of the wind cabinet body 7; and in the process of rolling up the filter 3, the electric two-way valve 62 of the purge assembly 6 is started, so that the peripheral air pump continuously injects a large amount of gas into the compressed air purge pipe 61, thereby blowing the dust on the old filter 3 into the dust collecting assembly 5, and then restoring the filtering capacity of the filter 3; after purging, the vent valve 515 is automatically opened, and at this time, the dust in the dust hood 51 can fall into the dust collecting cylinder 52 along the dust outlet 514, thereby realizing the automatic cleaning of the dust hood 51, and avoiding the dust collection effect of the filter 3 being affected by the excessive dust inside the dust hood 51.

[0120] To sum up, the utility model provides an automatic filter replacement device. When replacing the filter, the second roller moves the clean part of the filter from the first roller to the positioning frame, and the dirty filter also passes through the dust collecting component and is rolled up on the second roller simultaneously. Compared with the existing automatic filter replacement equipment, during the rolling process, the purge component can continuously blow high-speed airflow to the dirty filter, collect the dust into the dust collecting component, so that the filter can restore its filtering capacity, and then the filter can be reused to achieve the purpose of reducing the cost of use. The automatic filter replacement device also has the function of real-time detection of whether the filter is blocked, that is, it can avoid the lag of manual replacement and affect the air treatment effect in the environment.

[0121] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A filter screen automatic replacement device, characterized in that: It includes a first roller, a second roller, a filter screen, a positioning frame, a dust collecting component and a purge component; The two ends of the filter are respectively wound on the first roller and the second roller; When replacing the filter, the first roller or the second roller drives the filter to pass through the positioning frame and the dust collecting assembly in sequence; The air outlet end of the purge assembly is arranged toward the filter screen located in the dust collecting assembly.

2. The automatic filter replacement device according to claim 1, characterized in that: Roller assemblies are provided on both sides of the positioning frame and the filter screen in parallel with each other in the moving direction; The filter screen is in conflict with the outer circumferential surface of the roller assembly.

3. The automatic filter replacement device according to claim 2, characterized in that: The positioning frame is also provided with a pressure difference sensor; The positioning frame is provided with an air outlet; The filter is arranged at the air inlet end of the air outlet; The differential pressure sensor includes two detection ends; One of the detection ends is arranged at the air inlet end of the filter; The other detection end is arranged at the air outlet end of the air outlet.

4. The automatic filter replacement device according to claim 1, characterized in that: The dust collection assembly includes a dust collection hood; The dust collecting cover is provided with a first through hole and a second through hole; The first through hole and the second through hole are both located on the moving path of the filter screen; The inner wall of the first through hole and the inner wall of the second through hole are both provided with rubber sealing strips; The rubber sealing strip is in conflict with the surface of the filter screen.

5. The automatic filter replacement device according to claim 4, characterized in that: The dust collecting hood also includes a filter exhaust port; The filter screen divides the dust collecting hood into two parts; The air outlet end and the filter exhaust port of the purge assembly are respectively located on both sides of the filter screen.

6. The automatic filter replacement device according to claim 5, characterized in that: The dust collection assembly also includes a dust collection cylinder; The dust collecting hood also includes a dust outlet; The dust outlet is arranged toward the opening of the dust collecting cylinder; The dust outlet and the filter exhaust port are both arranged on the same side of the dust collecting hood; The dust outlet is arranged at the lowest point of the dust collecting hood; A vent valve is provided at the dust outlet.

7. The automatic filter replacement device according to claim 1, characterized in that: The purge assembly comprises a compressed air purge pipe, an electric two-way valve and an air pump which are connected in sequence; The compressed air purge pipe includes at least three purge holes; The purge holes are evenly distributed on the compressed air purge pipe along the axial direction of the compressed air purge pipe; The purge hole is arranged inside the dust collecting assembly; The purge hole is arranged toward the filter screen.

8. A wind cabinet, characterized in that: It comprises a wind cabinet body and the automatic filter replacement device according to any one of claims 1 to 7; The wind cabinet body includes a fresh air outlet; The automatic filter replacement device is connected to the fresh air outlet through a positioning frame; The area of ​​the filter is larger than the opening area of ​​the fresh air outlet.

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