External air inlet filtering device of air compressor

Abstract

The utility model provides an external air inlet filtering device of an air compressor, which comprises an outer shell, an inner shell and an outer shell, the outer shell is provided with two mutually independent filtering cavities, each filtering cavity is provided with an air inlet and an air outlet, and the air outlet is provided with a valve; one filter cartridge is installed in each filter cavity and used for filtering air, each filter cartridge is provided with an outer air inlet face and an inner air outlet channel, and the air inlet, the outer air inlet face, the inner air outlet channel and the air outlet of each filter cavity are sequentially communicated; each filter cavity is internally provided with one back-blowing piece, and the back-blowing pieces are located in the inner air outlet channels and used for conducting back-blowing on the filter cartridges; the double-filter-cylinder structure can realize alternate work of the two filter cylinders, one filter cylinder is standby, the other filter cylinder is used, the valve of one filter cavity is opened, and the reverse blowing piece is closed, so that filtered air is supplied to the air inlet end of the air compressor; the valve of the other filter cavity is closed, and the back-blowing piece is opened, so that the filter cartridge is subjected to back-blowing cleaning, the filter efficiency of the filter cartridge is improved, the filter cartridge is prevented from being blocked, and the service life of the filter cartridge is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to an external air intake filter device for an air compressor. Background Art

[0002] An air compressor is a device used to compress gas. When working, the air compressor needs to continuously absorb raw air from nature. Natural air usually contains dust and impurities. In order to prevent dust and impurities from entering the air compressor, causing serious damage to the core components of the air compressor, or even causing equipment failure and inability to continue to work normally, the raw air must be effectively filtered before entering the internal system of the air compressor to ensure the cleanliness of the raw air.

[0003] The existing air compressors mainly filter the dust and impurities in the raw air through a single filter cartridge structure. However, after the air intake filter cartridge filters the raw air, the dust and impurities in the air will adhere to the surface of the filter cartridge. When there are too many dust and impurities attached to the surface of the filter cartridge, it will affect the effective circulation of the air, causing the air intake volume of the air compressor to decrease, which directly affects the gas production efficiency of the air compressor. For this reason, the machine can only be shut down to replace the filter cartridge. Frequent replacement of the filter cartridge will increase production costs. Utility Model Content

[0004] In order to overcome the problems existing in the related technology, the utility model provides an external air intake filter device for an air compressor, which adopts a double filter cartridge structure. The two filter cartridges work alternately, and the non-working filter cartridge can backflush dust. The two filter cartridges rotate to backflush dust, which can improve the filtration efficiency, extend the service life of the filter cartridge, and reduce production costs.

[0005] The purpose of this utility model is to provide an external air intake filter device for an air compressor:

[0006] include:

[0007] An outer shell, wherein the outer shell has two independent filter chambers, each of which has an air inlet and an air outlet, and each of which is provided with a valve;

[0008] A filter cartridge is installed in each filter cavity, and is used to filter air. The filter cartridge has an outer air inlet surface and an inner air outlet channel. The air inlet, the outer air inlet surface, the inner air outlet channel and the air outlet of each filter cavity are connected in sequence.

[0009] A back-blowing component is installed in each filter chamber. The back-blowing component is located in the inner air outlet channel and is used to back-blow dust from the filter cartridge.

[0010] In a preferred technical solution of the utility model, a guide plate is installed at the bottom of the filter chamber, and the guide plate is located below the filter cartridge;

[0011] The inner bottom of the filter cavity is provided with a plurality of through holes on both sides of the guide plate as air inlets;

[0012] When the filter cartridge is back-blowing, the guide plate guides the dust and impurities blown off from the outer air inlet surface, which can speed up the speed at which the dust and impurities are discharged from the filter cavity through the air inlet.

[0013] In a preferred technical solution of the utility model, the guide plate includes a top plate and side plates arranged on both sides of the top plate;

[0014] The side panels are arranged obliquely, the bottom ends of the side panels are located outside the top ends of the side panels, and the top ends of the side panels are connected to the top panels.

[0015] In a preferred technical solution of the utility model, the top plate is a flat plate or an arc-shaped plate with an upward arch in the center.

[0016] In a preferred technical solution of the utility model, the filter cartridge is installed in the filter cavity via a fixing member;

[0017] The fixing member comprises a bracket and a gland;

[0018] The bracket is installed in the outer shell, and the filter cartridge is sleeved outside the bracket;

[0019] The gland is detachably connected to the bracket via a locking member;

[0020] The inner end of the filter cartridge abuts against the inner wall of the filter cavity, and the outer end abuts against the gland.

[0021] Specifically, the filter cartridge is installed horizontally and the pressure cover is set vertically. The locking member is a threaded rod and a nut. The threaded rod is set at the outer end of the bracket. A mounting hole for making way for the threaded rod is set in the middle of the pressure cover. The pressure cover is sleeved on the threaded rod through the mounting hole. The nut is set on the outer end side of the pressure cover. The pressure cover presses the filter cartridge through the lock nut.

[0022] Preferably, the nut is a butterfly nut.

[0023] In a preferred technical solution of the utility model, the backflush component includes a backflush pipe and a nozzle;

[0024] Preferably, the nozzle is a spiral nozzle;

[0025] The backblowing pipe is installed on the bracket, the nozzle is installed at the output end of the backblowing pipe, the input end of the backblowing pipe passes through the outer shell of the valve and is led out to connect to the high-pressure gas source, and the output end of the backblowing pipe extends into the inner gas outlet channel.

[0026] In a preferred technical solution of the utility model, a back-blowing valve for opening and closing the back-blowing pipe is installed at the input end of the back-blowing pipe.

[0027] Preferably, the blowback valve is a solenoid valve.

[0028] In a preferred technical solution of the utility model, a gas storage tank is installed outside the outer shell, the back-blowing pipe input end passes through the outer shell and is led out, the gas outlet of the gas storage tank is connected to the back-blowing pipe input end, and the gas inlet of the gas storage tank is connected to a high-pressure gas source.

[0029] In a preferred technical solution of the utility model, the valve is a gate valve, preferably an electric gate valve.

[0030] In a preferred technical solution of the utility model, the housing comprises a first housing, a second housing and a third housing connected in sequence;

[0031] The first shell is divided into two filter chambers by a partition;

[0032] The second housing cover is arranged outside the valve;

[0033] The third shell serves as an air outlet passage, and the third shell has two air inlet ends and one air outlet end. The two air inlet ends are respectively connected to two valves, and the air outlet end is connected to the air inlet of the air compressor.

[0034] The beneficial effects of the utility model are:

[0035] The outer shell has two independent filter chambers, and a valve is provided at the air outlet of the filter chamber. A filter cartridge and a back-blowing component are installed in each filter chamber. The filter cartridge has an outer air inlet surface and an inner air outlet channel. The back-blowing component is located in the inner air outlet channel. The air inlet, outer air inlet surface, inner air outlet channel and air outlet of each filter chamber are connected in sequence.

[0036] The double filter cartridge structure can realize the alternating operation of the two filter cartridges, one in reserve and the other in use. The valve of one filter chamber is opened and the back-blowing piece is closed to filter air and provide it to the air inlet end of the air compressor; the valve of the other filter chamber is closed and the back-blowing piece is opened to back-blow the filter cartridge to clean it, so as to blow off some dust and impurities attached to the outer air inlet surface of the filter cartridge and discharge them from the air inlet port, thereby improving the filtration efficiency of the filter cartridge through back-blowing, avoiding clogging of the filter cartridge and extending the service life of the filter cartridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of an external air intake filter device for an air compressor.

[0038] Figure 2 It is a structural cross-sectional view of an external air intake filter device for an air compressor.

[0039] Figure 3 It is a schematic diagram of the structure on the air inlet side.

[0040] Figure 4 It is a schematic diagram of the structure of the air inlet and outlet sides.

[0041] Figure 5 It is a structural diagram of the fixing parts.

[0042] Reference numerals:

[0043] 100, outer shell; 101, first shell; 102, second shell; 103, third shell; 104, fourth shell; 110, filter chamber; 111, air inlet; 112, guide plate; 113, air outlet; 200, back-blowing part; 210, air storage tank; 220, back-blowing valve; 230, back-blowing pipe; 240, nozzle; 300, frame; 400, valve; 500, filter cartridge; 600, fixing part; 610, bracket; 620, gland; 630, threaded rod; 640, nut. DETAILED DESCRIPTION

[0044] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0045] An air compressor is a device used to compress gas. When working, the air compressor needs to continuously absorb raw air from nature. Natural air usually contains dust and impurities. In order to prevent dust and impurities from entering the air compressor, causing serious damage to the core components of the air compressor, or even causing equipment failure and inability to continue to work normally, the raw air must be effectively filtered before entering the internal system of the air compressor to ensure the cleanliness of the raw air.

[0046] The existing air compressors mainly filter the dust and impurities in the raw air through a single filter cartridge structure. However, after the air intake filter cartridge filters the raw air, the dust and impurities in the air will adhere to the surface of the filter cartridge. When there are too many dust and impurities attached to the surface of the filter cartridge, it will affect the effective circulation of the air, causing the air intake volume of the air compressor to decrease, which directly affects the gas production efficiency of the air compressor. For this reason, the machine can only be shut down to replace the filter cartridge. Frequent replacement of the filter cartridge will increase production costs.

[0047] Example

[0048] In response to the above problems, the present embodiment provides an external air intake filter device for an air compressor, which adopts a double filter cartridge 500 structure. The two filter cartridges 500 work alternately, and the non-working filter cartridge 500 can back-blow dust. The two filter cartridges 500 rotate to back-blow dust, which can improve the filtration efficiency, extend the service life of the filter cartridge 500, and reduce production costs.

[0049] like Figure 1-5 As shown, an external air intake filter device for an air compressor:

[0050] include:

[0051] The outer shell 100 has two independent filter chambers 110, each of which has an air inlet 111 and an air outlet 113, and the air outlet 113 is provided with a valve 400;

[0052] A filter cartridge 500 is installed in each filter cavity 110 to filter air. The filter cartridge 500 has an outer air inlet surface and an inner air outlet channel. The air inlet 111, the outer air inlet surface, the inner air outlet channel and the air outlet 113 of each filter cavity 110 are connected in sequence.

[0053] A back-blowing component 200 is installed in each filter cavity 110 . The back-blowing component 200 is located in the inner air outlet channel and is used to back-blow dust from the filter cartridge 500 .

[0054] When in use, the two filter cartridges 500 work alternately, one in reserve and the other in use; the valve 400 of one filter chamber 110 is opened, and the back-blowing component 200 is closed to filter air and provide it to the air inlet end of the air compressor; the valve 400 of the other filter chamber 110 is closed, and the back-blowing component 200 is opened to back-blow and clean the filter cartridge 500 by connecting high-pressure gas, so as to blow off part of the dust and impurities attached to the outer air inlet surface of the filter cartridge 500, and the blown-off dust and impurities are discharged from the air inlet 111, thereby improving the filtering efficiency of the filter cartridge 500, avoiding clogging of the filter cartridge 500, and extending the service life of the filter cartridge 500.

[0055] The device is used in conjunction with an air compressor, and the air outlet 113 is connected to the air inlet 111 of the air compressor. When the air compressor is in use, one filter chamber 110 is working and the other filter chamber 110 is back-blowing dust;

[0056] For the working filter chamber 110, the valve 400 is opened, the back-blowing element 200 is closed, and air enters the working filter chamber 110 from the air inlet 111. After being filtered by the filter cartridge 500, clean air enters from the air inlet of the air compressor.

[0057] For the back-blowing filter chamber 110, the valve 400 is closed, the back-blowing member 200 is opened, and the back-blowing member 200 is connected to an external clean and dry high-pressure gas source. The high-pressure gas enters the inner gas outlet channel of the filter cartridge 500 through the back-blowing member 200, and back-blowing and dust removal are performed on the filter cartridge 500, and some dust and impurities attached to the outer air inlet surface of the filter cartridge 500 are blown off and discharged from the air inlet 111;

[0058] It should be noted that the air compressor is equipped with post-processing equipment, which is used to filter, dry and dehumidify the high-pressure components to ensure the cleanliness and dryness of the high-pressure gas. The high-pressure gas source of this device is provided by the post-processing equipment equipped with the air compressor.

[0059] In this embodiment, a guide plate 112 is installed in the middle of the inner bottom of the filter chamber 110, and the guide plate 112 is located below the filter cartridge 500;

[0060] The inner bottom of the filter chamber 110 is provided with a plurality of through holes on both sides of the guide plate 112 as air inlets 111;

[0061] When the filter cartridge 500 is back-blown, the guide plate 112 guides the dust and impurities blown off from the outer air inlet surface, thereby accelerating the speed at which the dust and impurities are discharged from the filter cavity 110 through the air inlet 111 .

[0062] In this embodiment, the guide plate 112 includes a top plate and side plates arranged on both sides of the top plate; the side plates are inclined, the bottom ends of the side plates are located outside the top ends of the side plates, and the top ends of the side plates are connected to the top plate.

[0063] In this embodiment, the top plate is a flat plate or a curved plate with an upward arch in the center, and the curved plate accelerates the air at the top plate to flow toward the side plates.

[0064] Preferably, the guide plate 112 is a sheet metal part, which is formed by bending a metal plate; it should be noted that the guide plate 112 can also be an arc-shaped plate.

[0065] In this embodiment, the filter cartridge 500 is installed in the filter chamber 110 via a fixing member 600;

[0066] The fixing member 600 includes a bracket 610 and a pressure cover 620;

[0067] The bracket 610 is installed in the outer shell 100, and the filter cartridge 500 is sleeved outside the bracket 610;

[0068] The gland 620 is detachably connected to the bracket 610 via a locking member;

[0069] The inner end of the filter cartridge 500 abuts against the inner wall of the filter cavity 110 , and the outer end abuts against the pressure cover 620 .

[0070] Specifically, the filter cartridge 500 is installed horizontally and the pressure cover 620 is arranged vertically. The locking parts are a threaded rod 630 and a nut 640. The threaded rod 630 is arranged at the outer end of the bracket 610. A mounting hole for making way for the threaded rod 630 is arranged in the middle of the pressure cover 620. The pressure cover 620 is sleeved on the threaded rod 630 through the mounting hole. The nut 640 is arranged on the outer end side of the pressure cover 620. The pressure cover 620 presses the filter cartridge 500 together through the lock nut.

[0071] Preferably, the nut 640 is a butterfly nut 640 to increase the disassembly speed of the gland 620 and improve the replacement efficiency of the filter cartridge 500 .

[0072] In this embodiment, the backflush component 200 includes a backflush pipe 230 and a nozzle 240;

[0073] Preferably, the nozzle 240 is a spiral nozzle 240, which has more uniform air discharge and can reduce the cleaning dead angle when the filter cartridge 500 is back-blown;

[0074] The backblowing tube 230 is installed on the bracket 610, and the nozzle 240 is installed at the output end of the backblowing tube 230. The input end of the backblowing tube 230 passes through the outer shell of the valve 400 and is led out to connect to the high-pressure gas source. The output end of the backblowing tube 230 extends into the inner gas outlet channel.

[0075] In this embodiment, a back-blowing valve 220 for opening and closing the back-blowing tube 230 is installed at the input end of the back-blowing tube 230 .

[0076] Preferably, the blowback valve 220 is a solenoid valve.

[0077] In this embodiment, a gas tank 210 is installed outside the outer shell 100, and the input end of the backblowing pipe 230 passes through the outer shell 100 and is led out. The air outlet of the gas tank 210 is connected to the input end of the backblowing pipe 230, and the air inlet of the gas tank 210 is connected to the high-pressure gas source. The gas tank 210 is used to ensure the flow rate when the recoil component is just turned on, so that the high-pressure gas output by the recoil component just turned on has a higher impact force, which is beneficial to flushing the filter cartridge 500.

[0078] In this embodiment, the valve 400 is a gate valve, preferably an electric gate valve.

[0079] In this embodiment, the housing includes a first housing 101, a second housing 102 and a third housing 103 which are connected in sequence;

[0080] The first housing 101 is divided into two filter chambers 110 by a partition;

[0081] The second housing 102 is disposed outside the valve 400;

[0082] The third shell 103 serves as an air outlet passage. The third shell 103 has two air inlet ends and one air outlet end. The two air inlet ends are respectively connected to two valves 400 , and the air outlet end is connected to the air inlet of the air compressor.

[0083] In this embodiment, a transparent acrylic back panel is detachably mounted on the back of the first shell 101. After the transparent acrylic back panel is installed, the filter cavity 110 is sealed. The back panel is designed to be transparent to facilitate observation of the status of the internal filter barrel.

[0084] In this embodiment, the housing is mounted on the frame 300 .

[0085] In this embodiment, the housing further includes a fourth housing 104, which is installed outside the first housing 101 or the second housing 102. The fourth housing 104 serves as an electric control box, and a box door is installed on one side of the fourth housing 104. The fourth housing 104 is equipped with electric control components for controlling the opening and closing of the valve 400 and the blowback valve 220. The electric control components are conventionally known components, and at least include a controller, a timer, and a counter.

[0086] When in use, one of the two filter cartridges 500 performs air filtering, and the other performs backblowing dust; the controller controls the valve 400 of the filter chamber 110 for air filtering to open, and the backblowing valve 220 to close; the controller controls the valve 400 of the filter chamber 110 for backblowing to close, and the backblowing valve 220 to close; in practical applications, the controller adjusts the duration and number of cycles of a single backblowing through a timer and a counter.

[0087] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a restriction. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in the subsequent accompanying drawings.

[0088] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0089] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0090] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An external air intake filter device for an air compressor, characterized in that: include: An outer shell, wherein the outer shell has two independent filter chambers, each of which has an air inlet and an air outlet, and each of which is provided with a valve; A filter cartridge is installed in each filter cavity, and is used to filter air. The filter cartridge has an outer air inlet surface and an inner air outlet channel. The air inlet, the outer air inlet surface, the inner air outlet channel and the air outlet of each filter cavity are connected in sequence. A back-blowing component is installed in each filter chamber. The back-blowing component is located in the inner air outlet channel and is used to back-blow dust from the filter cartridge.

2. The external air intake filter device for an air compressor according to claim 1, characterized in that: A guide plate is installed at the bottom of the filter chamber, and the guide plate is located below the filter cartridge; The inner bottom of the filter cavity is provided with a plurality of through holes on both sides of the guide plate as air inlets.

3. The external air intake filter device for an air compressor according to claim 2, characterized in that: The guide plate includes a top plate and side plates arranged on both sides of the top plate; The side panels are arranged obliquely, the bottom ends of the side panels are located outside the top ends of the side panels, and the top ends of the side panels are connected to the top panels.

4. The external air intake filter device for an air compressor according to claim 3, characterized in that: The top plate is a flat plate or a curved plate with an upward arch in the center.

5. The external air intake filter device for an air compressor according to claim 1, characterized in that: The filter cartridge is installed in the filter cavity via a fixing member; The fixing member comprises a bracket and a gland; The bracket is installed in the outer shell, and the filter cartridge is sleeved outside the bracket; The gland is detachably connected to the bracket via a locking member; The inner end of the filter cartridge abuts against the inner wall of the filter cavity, and the outer end abuts against the gland.

6. The external air intake filter device for an air compressor according to claim 5, characterized in that: The backflush component comprises a backflush pipe and a nozzle; The backblowing pipe is installed on the bracket, the nozzle is installed at the output end of the backblowing pipe, the input end of the backblowing pipe passes through the outer shell of the valve and is led out to connect to the high-pressure gas source, and the output end of the backblowing pipe extends into the inner gas outlet channel.

7. The external air intake filter device for an air compressor according to claim 6, characterized in that: A back-blowing valve for opening and closing the back-blowing pipe is installed at the input end of the back-blowing pipe.

8. The external air intake filter device for an air compressor according to claim 7, characterized in that: An air storage tank is installed outside the outer shell, the input end of the back-blowing pipe penetrates the outer shell and is led out, the air outlet of the air storage tank is connected to the input end of the back-blowing pipe, and the air inlet of the air storage tank is connected to a high-pressure air source.

9. The external air intake filter device for an air compressor according to claim 1, characterized in that: The valve is a gate valve.

10. The external air intake filter device for an air compressor according to claim 1, characterized in that: The housing comprises a first housing, a second housing and a third housing connected in sequence; The first shell is divided into two filter chambers by a partition; The second housing cover is arranged outside the valve; The third shell serves as an air outlet passage, and the third shell has two air inlet ends and one air outlet end. The two air inlet ends are respectively connected to two valves, and the air outlet end is connected to the air inlet of the air compressor.

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