Independent air inlet box of screw air compressor

Abstract

The utility model discloses an independent air inlet box of a screw air compressor, and belongs to the technical field of gas compression fluid mechanical equipment. An independent air inlet box of a screw air compressor comprises an air inlet box, a pre-filtering net and an air filtering assembly. The air inlet box is communicated with the air filter assembly, the pre-filter screen is detachably installed at an air inlet of the air inlet box, large-particle dust or floccules are blocked outside the air inlet box in advance, and therefore the service life of a filter element of the inner air filter assembly is prolonged. Meanwhile, the air inlet box further comprises a dust removal device, the dust removal device is arranged on the side portion of the air inlet, dust or floccules remaining on the surface of the pre-filtering net can be removed, and the dust or floccules are prevented from being attached to the surface of the pre-filtering net.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas compression fluid mechanical equipment, and more specifically relates to an independent air intake box of a screw air compressor. Background Art

[0002] Screw air compressor is a kind of efficient and reliable compressed air equipment. Its working principle is based on the principle of volumetric compression. The air is compressed by the rotation of two intermeshing screws in the casing. Specifically, when the screw rotates in the casing, the volume between its teeth changes continuously, thereby sucking in and compressing the air. This compression process is carried out in a closed system, ensuring the purity and pressure stability of the compressed air.

[0003] Traditional air compressors generally install the air filter assembly directly inside the entire machine case. This method causes the internal temperature of the air compressor to be high, which in turn increases the intake temperature. Excessively high intake temperature will cause the density of the hot air to decrease, thereby reducing the intake volume, which directly affects the exhaust volume and compression efficiency of the air compressor; for example, a compressor intake air filter system (CN201621136358.8) disclosed in a Chinese invention patent document improves the intake efficiency of the compressor host and the working stability of the entire machine by adding an independent intake bellows and a pre-filter, thereby improving the intake quality and the service life of the compressor host; however, the pre-filter of this solution may be clogged due to long-term use, and the air duct may increase the resistance of the air flow, especially in tortuous or long pipes, which may have a negative impact on the intake efficiency.

[0004] Therefore, we need an independent air intake box for a screw air compressor with stable operation, low noise, high air intake efficiency and the ability to increase the service life of the air filter assembly filter element. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an independent air intake box of a screw air compressor with stable operation, low noise and high air intake efficiency, and at the same time to increase the service life of the air filter assembly filter element by filtering large dust particles or flocs.

[0006] The utility model discloses an independent air intake box of a screw air compressor, comprising an air intake box, a pre-filter and an air filter assembly; the air intake box is connected to the air filter assembly, and the pre-filter is detachably mounted at the air inlet of the air intake box, so that large dust particles or floccules are blocked outside the air intake box in advance, thereby prolonging the service life of the filter element of the internal air filter assembly.

[0007] The air inlet box also includes a box body, an air outlet and a dust removal device. The air outlet is arranged on a side of the box body away from the air inlet. The dust removal device is arranged on the side of the air inlet and can remove residual dust or flocs on the surface of the pre-filter to prevent dust or flocs from adhering to the surface of the pre-filter.

[0008] The air inlet box is installed outside the screw air compressor to reduce the intake air temperature and avoid affecting the exhaust volume and compression efficiency of the air compressor.

[0009] As a further improvement of the utility model, a number of evenly arranged guide plates are respectively provided on the upper and lower parts of the box body, and the upper guide plates and the lower guide plates are staggered to ensure that the airflow can flow along a predetermined path inside the box body, avoiding excessive concentration or sparse airflow in local areas, thereby improving the uniformity of the airflow; at the same time, a number of evenly arranged guide plates can also reduce the noise transmitted from the air filter assembly.

[0010] As a further improvement of the utility model, the dust removal device includes a cylinder, a plurality of push rods and a cover plate, the cylinder is detachably mounted on the top of the box body, one end of the push rod is connected to the cylinder output end, and the other end is detachably connected to the upper part of the cover plate; a mesh plate is provided on the side of the air inlet, and the pre-filter is detachably mounted in the middle of the mesh plate; the height of the cover plate is half of the height of the mesh plate, the cover plate is close to the mesh plate, and is slidably connected to the mesh plate, and can respectively close the mesh plates in the upper and lower areas of the pre-filter, thereby achieving the effect of cutting off the connection between the inside of the box body and the outside world at the mesh plate and the gas entering the box body blowing the pre-filter along the guide plate.

[0011] As a further improvement of the utility model, a connecting rod 1 is fixedly provided at the bottom of the cover plate, and a connecting rod 2 is hingedly connected to the lower part of the connecting rod; a wind shield is hingedly connected to the lower part of the connecting rod, and the wind shield is slidably connected to the surface of the guide plate near the air inlet; the wind shield moves down synchronously after the cover plate moves down, so that when the cover plate blocks the mesh plate below the pre-filter, the gas in a larger space is diverted to the mesh plate above the pre-filter, thereby achieving the purpose of purging the pre-filter.

[0012] As a further improvement of the present invention, the cylinder is electrically connected to a PLC controller for controlling the cylinder to drive the cover plate to move.

[0013] As a further improvement of the utility model, the lower portion of the wind shield has an arc-shaped profile for guiding the gas to flow upward along the wind shield.

[0014] As a further improvement of the utility model, a slope is provided on the upper surface of the box body on the side of the pre-filter away from the dust removal device, and a collecting groove is provided at the lower part of the slope for collecting dust blown by the dust removal device to prevent the dust after blowing from being attached to the surface of the pre-filter again due to the suction force of the air compressor.

[0015] Compared with the prior art, the beneficial effects of the utility model are: by using an independent air intake box of a screw air compressor of the utility model, which is arranged outside the screw air compressor, the intake air temperature can be reduced, and the stable operation of the equipment can be ensured while filtering large dust or flocs, thereby increasing the service life of the air filter assembly filter element; by arranging a dust removal device, the upper and lower areas of the mesh plate are blocked by a control cover plate, thereby respectively achieving the effect of cutting off the connection between the inside of the box and the outside at the mesh plate and the gas entering the box sweeping the pre-filter along the guide plate; by arranging a number of evenly arranged and staggered guide plates respectively inside the box, it is ensured that the airflow inside the box can flow along a predetermined path, thereby improving the uniformity of the airflow, thereby improving the stability of the device operation, and at the same time, the uniform arrangement of the guide plates can also reduce the noise transmitted from the air filter assembly, thereby achieving the effect of drainage and noise reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the air inlet box of the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the dust removal device of the utility model;

[0019] Figure 4 It is an enlarged schematic diagram of the structure at point A of the present utility model.

[0020] Description of the numbers in the figure:

[0021] 1 air inlet box, 11 air inlet, 12 box body, 13 air outlet, 14 dust removal device, 141 cylinder, 142 push rod, 143 cover plate, 144 connecting rod 1, 145 connecting rod 2, 146 wind shield, 147 PLC controller, 15 guide plate, 16 ramp, 17 collecting trough, 18 grid plate, 2 pre-filter, 3 air filter assembly. DETAILED DESCRIPTION

[0022] Specific embodiment 1: Please refer to Figure 1-4 An independent air intake box of a screw air compressor comprises an air intake box 1, a pre-filter 2 and an air filter assembly 3; the air intake box 1 is connected to the air filter assembly 3, and the pre-filter 2 is detachably mounted at the air inlet 11 of the air intake box 1, so as to block large dust particles or flocs outside the air intake box 1 in advance, thereby increasing the service life of the filter element of the internal air filter assembly 3.

[0023] The air inlet box 1 also includes a box body 12, an air outlet 13 and a dust removal device 14. The air outlet 13 is arranged on a side of the box body 12 away from the air inlet 11. The dust removal device 14 is arranged on the side of the air inlet 11, which can remove residual dust or flocs on the surface of the pre-filter 2 to prevent dust or flocs from adhering to the surface of the pre-filter 2 and reducing the air intake efficiency during long-term use.

[0024] The air inlet box 1 is installed outside the screw air compressor to reduce the intake temperature and avoid the reduction of the density of the hot air due to excessively high intake temperature, thereby reducing the intake volume and affecting the exhaust volume and compression efficiency of the air compressor.

[0025] Specifically, Figure 2 A plurality of evenly arranged guide plates 15 are respectively provided at the upper and lower parts of the box body 12, and the upper guide plates 15 and the lower guide plates 15 are staggered to ensure that the airflow can flow along a predetermined path inside the box body 12, avoiding excessive concentration or sparseness of the airflow in a local area, thereby improving the uniformity of the airflow; at the same time, a plurality of evenly arranged guide plates 15 can also reduce the noise transmitted from the air filter assembly 3; stable air intake and low noise help to reduce vibration and impact inside the equipment, thereby improving the overall stability and reliability of the equipment.

[0026] Specifically, Figure 3-4 The dust removal device 14 includes a cylinder 141, a plurality of push rods 142 and a cover plate 143. The cylinder 141 is detachably mounted on the top of the box body 12. One end of the push rod 142 is connected to the output end of the cylinder 141, and the other end is detachably connected to the upper part of the cover plate 143. A mesh plate 18 is provided on the side of the air inlet 11, and the pre-filter 2 is detachably mounted in the middle of the mesh plate 18. The height of the cover plate 143 is half of the height of the mesh plate 18. The cover plate 143 is close to the mesh plate 18 and is slidably connected to the mesh plate 18. When the cylinder 141 When the cover plate 143 is driven to move upward, the mesh plate 18 in the upper area of ​​the pre-filter 2 will be closed, cutting off the connection between the inside of the box 12 and the outside at the mesh plate 18, so that the air intake of the air intake box 1 all enters from the pre-filter 2, and it is in the air intake state at this time; when the cylinder 141 drives the cover plate 143 to move downward, the mesh plate 18 in the lower area of ​​the pre-filter 2 will be closed. At this time, the gas entering the box 12 will flow up along the guide plate 15 to the position of the mesh plate 18, and sweep the dust or flocs on the surface of the pre-filter 2, and it is in the dust removal state at this time.

[0027] Specifically, a connecting rod 144 is fixedly provided at the bottom of the cover plate 143, and a connecting rod 145 is hingedly connected to the lower part of the connecting rod 144; a wind shield 146 is hingedly connected to the lower part of the connecting rod 145, and the wind shield 146 is slidably connected to the surface of the guide plate 15 near the air inlet 11; the wind shield 146 moves downward synchronously after the cover plate 143 moves downward, so that when the cover plate 143 blocks the mesh plate 18 below the pre-filter 2, the gas in a larger space is diverted to the mesh plate 18 above the pre-filter 2, so as to achieve the purpose of purging the pre-filter 2.

[0028] Specifically, the cylinder 141 is electrically connected to the PLC controller 147 to control the cylinder 147 to drive the cover plate 143 to move up and down to respectively close the mesh plate 18 in the upper or lower area of ​​the pre-filter 2 .

[0029] Specifically, the lower portion of the wind shield 146 has an arc-shaped profile for guiding the gas to flow upward along the wind shield 146 .

[0030] Specifically, a slope 16 is provided on the upper surface of the box body 12 on the side of the pre-filter 2 away from the dust removal device 14, and a collecting groove 17 is provided at the bottom of the slope 16 for collecting dust blown by the dust removal device 16 to prevent the dust after blowing from being attached to the surface of the pre-filter 2 again due to the suction force of the air compressor.

[0031] During use, the PLC controller 147 controls the cylinder 141 to drive the cover plate 143 to move up to close the mesh plate 18 in the upper area of ​​the pre-filter 2, and the air compressor is loaded with air. The gas enters from the air inlet 11 and flows to the inside of the air filter assembly 3 along the guide plates 15 arranged in sequence. The dust or flocs are filtered by the pre-filter 2 and remain on its surface. At this time, it is the loaded air suction state of the air compressor; the PLC controller 147 controls the cylinder 141 to drive the cover plate 143 to move down to close the mesh plate 18 in the lower area of ​​the pre-filter 2. At this time, the wind shield 146 will also be driven to move downward, and the air compressor continues to load and inhale. At this time, the inhaled gas will be guided by the arc-shaped end of the wind shield 146 and flow along the guide plate 15. The upstream gas will be blown out from the upper area of ​​the mesh plate 18, acting on the dust or flocs on the surface of the pre-filter 2, and blowing it into the collection tank 17 through the slope 16 to ensure the continuous use of the pre-filter.

[0032] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. An independent air inlet box for a screw air compressor, characterized in that: The invention comprises an air inlet box (1), a pre-filter (2) and an air filter assembly (3); the air inlet box (1) is connected to the air filter assembly (3); the pre-filter (2) is detachably mounted at the air inlet (11) of the air inlet box (1) and is used to filter large dust particles or flocculent matter; The air inlet box (1) further comprises a box body (12), an air outlet (13) and a dust removal device (14); the air outlet (13) is arranged on a side of the box body (12) away from the air inlet (11); the dust removal device (14) is arranged on the side of the air inlet (11) and is used to remove dust or flocs remaining on the surface of the pre-filter (2); The air inlet box (1) is installed outside the screw air compressor and is used to reduce the intake air temperature.

2. The independent air inlet box of a screw air compressor according to claim 1, characterized in that: A plurality of evenly arranged guide plates (15) are respectively provided at the top and the bottom of the box body (12), and the upper guide plates (15) and the lower guide plates (15) are arranged in a staggered manner to guide flow and reduce noise.

3. The independent air inlet box of a screw air compressor according to claim 1, characterized in that: The dust removal device (14) comprises a cylinder (141), a plurality of push rods (142) and a cover plate (143); the cylinder (141) is detachably mounted on the top of the box body (12); one end of the push rod (142) is connected to the output end of the cylinder (141), and the other end is detachably connected to the upper part of the cover plate (143); a mesh plate (18) is provided on the side of the air inlet (11); the pre-filter (2) is detachably mounted in the middle of the mesh plate (18); the height of the cover plate (143) is half the height of the mesh plate (18); the cover plate (143) is closely attached to the mesh plate (18) and is slidably connected to the mesh plate (18) to respectively close the mesh plate (18) in the upper and lower areas of the pre-filter (2).

4. The independent air inlet box of a screw air compressor according to claim 3, characterized in that: A connecting rod 1 (144) is fixedly provided at the bottom of the cover plate (143), and a connecting rod 2 (145) is hingedly connected to the lower portion of the connecting rod 1 (144); a windshield plate (146) is hingedly connected to the lower portion of the connecting rod 2 (145) and is used to guide gas to the mesh plate (18) above the pre-filter (2) when the cover plate (143) blocks the mesh plate (18) below the pre-filter (2).

5. The independent air inlet box of a screw air compressor according to claim 3, characterized in that: The cylinder (141) is electrically connected to a PLC controller (147) for controlling the cylinder (141) to drive the cover plate (143) to move.

6. The independent air inlet box of a screw air compressor according to claim 4, characterized in that: The lower contour of the wind shield (146) is arc-shaped, and is used to guide the gas to flow upward along the wind shield (146).

7. The independent air inlet box of a screw air compressor according to claim 1, characterized in that: A slope (16) is provided on the upper surface of the box body (12) on the side of the pre-filter (2) away from the dust removal device (14), and a collecting groove (17) is provided at the bottom of the slope (16) for collecting dust swept by the dust removal device (14).

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