A compressed air precision filter

Abstract

The application discloses a compressed air precision filter and belongs to the technical field of filters, which comprises a shell, an air inlet, an air outlet and a filter element inside the shell, an outer layer filter screen is arranged on the outer surface of the filter element, a cleaning pipeline is arranged on the shell, a switch valve is arranged on the cleaning pipeline, a transmission assembly is arranged between the shell and the outer layer filter screen and is used for separating the outer layer filter screen from the filter element. The outer layer filter screen is arranged on the surface of the filter element, the compressed air is filtered by the outer layer filter screen first, the impurities accumulated on the filter element are reduced, when the outer layer filter screen is used for a period of time, the transmission assembly arranged on the filter element is operated outside the shell, the outer layer filter screen is separated from the filter element and is stored in a storage part, the air is not blocked from entering the filter element, the service life of the filter element is prolonged, the air cleaning pipeline is arranged, a reverse spiral airflow is formed, the filter element is cleaned and the service life of the filter element is also prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of filter, in particular to a compressed air precision filter. BACKGROUND

[0002] The compressed air precision filter is mainly used for removing the pollutants such as dust, iron filings and solid particles in the compressed air system, so as to achieve the effect of high-efficiency removal, and after use, the controlled environment can achieve oil-free and impurity-free, and is also used for solid-liquid separation of various suspensions, and is commonly applicable to the industrial fields of medicine, food, chemical industry, environmental protection and water treatment.

[0003] However, the service life of the filter core of the existing precision filter is limited by time, and the service life is generally about one year, and then the filter needs to be disassembled and replaced with a new filter core, and many places in enterprises need to use the precision filter at present, and the demand is large, and how to prolong the service life of the precision filter is an urgent problem to be solved, and therefore, the present application provides a compressed air precision filter. SUMMARY

[0004] The present application provides a compressed air precision filter, which is provided with an outer filter screen on the surface of the filter core, the outer filter screen filters the air, and when the outer filter screen is used for a period of time, the transmission assembly arranged on the filter core is used to separate the outer filter screen from the filter core, thereby prolonging the service life of the filter core. The air cleaning pipeline is arranged to clean the filter core reversely, thereby prolonging the service life of the filter core. In order to solve the above technical problems, the present application solves the problems by the following technical scheme.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] The compressed air precision filter comprises a shell, an air inlet, an air outlet and a filter core in the shell, compressed air enters from the air inlet, flows to the center of the filter core through the circumferential surface of the filter core, and then exits through the air outlet, thereby completing the filtration of the air. The filter core is composed of upper and lower end plates, an outer steel screen, an inner steel screen and an inner filter screen between the outer steel screen and the inner steel screen. The outer surface of the filter core is provided with a separable outer filter screen, the outer filter screen filters the air first, and then the air passes through the inner filter screen, at this time, the outer filter screen plays a major role. A cleaning pipeline is arranged on the shell, a switch valve is arranged on the cleaning pipeline, the switch valve prevents the filtered air from flowing out through the cleaning pipeline, and a transmission assembly is arranged between the shell and the outer filter screen, which is used for separating the outer filter screen from the filter core.

[0007] Preferably, the cleaning pipe in the shell is located at the center of the filter core, facilitating cleaning of the filter core, and the cleaning pipe is provided with an air outlet pipe in communication with the cleaning pipe.

[0008] Preferably, a rotating pipe is rotatably arranged on the cleaning pipe, and the air outlet pipe is fixed with the rotating pipe and in communication with the cleaning pipe through the rotating pipe.

[0009] Preferably, the bottom of the filter core is provided with a receiving member including an outer cylinder and an inner cylinder, the outer cylinder is fixedly connected with the inner cylinder, and the outer cylinder and the inner cylinder form a receiving space, and the outer filter screen is pulled into the receiving space through the transmission assembly.

[0010] Preferably, the bottom of the outer cylinder and the inner cylinder is provided with a channel, and during the compressed air filtering process, water will accumulate in the shell, the bottom of the shell is the water outlet, and the channel prevents water from accumulating at the bottom of the outer cylinder and the inner cylinder.

[0011] Preferably, the outer cylinder is fixedly connected with symmetrical guide plates, the guide plates are arc-shaped plates matched with the outer cylinder, the upper end of the guide plate is fixed with the upper end of the filter core, the guide plate guides the outer filter screen to prevent it from occupying too much space in the radial direction during separation from the filter core, and the guide plate enables the outer filter screen to completely enter the receiving member.

[0012] Preferably, the upper and lower ends of the outer filter screen are fixed with guide rings, the guide rings are sleeved with the filter core, and the guide rings are specifically sleeved with the outer steel screen, the outer diameter of the guide ring is smaller than the inner diameter of the outer cylinder, and the outer diameter of the inner cylinder is not greater than the inner diameter of the guide ring, preventing the guide ring from colliding with the receiving member.

[0013] Preferably, the transmission assembly includes an unlocking part and a compression part, the compression part includes a steel wire rope, a first fixed pulley, a second fixed pulley, an ascending plate and a spring, the first fixed pulley is rotatably connected with the upper guide ring, the second fixed pulley is rotatably connected with the outer cylinder, the ascending plate is located outside the outer cylinder, the ascending plate is attached to the wall of the outer cylinder, the guide plate limits the ascending plate, the second fixed pulley is located below the ascending plate, one end of the steel wire rope is fixed with the lower guide ring, the other end passes through the first fixed pulley and the second fixed pulley and is fixed with the ascending plate, the other end passes through the first fixed pulley, then passes through the second fixed pulley and is fixed with the ascending plate, the spring is in a stretched state, and the two ends of the spring are fixed with the filter core and the ascending plate, respectively, and the unlocking part is used to unlock the spring in the stretched state.

[0014] Preferably, the two sides of the lifting plate are respectively rotationally connected with limiting plates, torsion springs are arranged between the lifting plate and the limiting plates, one end of the torsion spring is fixed with the rotation shaft of the limiting plate, the other end is fixed with the lifting plate, a fixed plate is fixedly connected with the lifting plate, the fixed plate prevents the limiting plate from rotating upward, the upper side of the limiting plate is fixedly connected with a stop plate, and the stop plate corresponds to the limiting plate one by one.

[0015] Preferably, the unlocking part comprises a screw rod, a rod body and an unlocking plate, the rod body and the screw rod are connected with the unlocking plate at the ends, and the unlocking plate is located on the upper surface of the lifting plate and is limited thereby.

[0016] Compared with the prior art, the compressed air precision filter has the following beneficial effects: the compressed air precision filter of the present application is provided with an outer filter screen sleeved on the surface of the filter element, the outer filter screen filters the compressed air first, reduces impurities accumulated on the filter element, and when the outer filter screen is used for a period of time, the transmission assembly arranged on the filter element is operated outside the shell, so that the outer filter screen is separated from the filter element and is accommodated in the accommodating member, which does not block the air from entering the filter element, prolongs the service life of the filter element, the air cleaning pipeline is arranged, a reverse spiral airflow is formed, the filter element is cleaned, and the service life of the filter element is also prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only represent some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the compressed air precision filter of the present application.

[0019] Figure 2 It is a schematic diagram of the rotating pipe and the air outlet pipe of the compressed air precision filter of the present application.

[0020] Figure 3 It is a schematic diagram of the Figure 2 of the present application.

[0021] Figure 4 It is a schematic diagram of the transmission assembly and the outer filter screen of the compressed air precision filter of the present application.

[0022] Figure 5 It is a schematic diagram of the Figure 4 of the present application.

[0023] Figure 6 It is a schematic diagram of theFigure 4 Amplified schematic view at C.

[0024] Figure 7 Schematic view of outer filter screen and guide ring of compressed air precision filter of the present application.

[0025] Figure 8 Schematic view of limiting plate and torsion spring of compressed air precision filter of the present application.

[0026] Figure 9 Schematic view of filter core of compressed air precision filter of the present application.

[0027] Figure number explanation: 1, shell; 11, air inlet; 12, air outlet; 2, filter core; 21, end plate; 22, outer steel screen; 23, inner steel screen; 24, inner filter screen; 3, outer filter screen; 4, cleaning pipe; 41, on-off valve; 42, air outlet pipe; 43, rotating pipe; 44, helical blade; 5, transmission assembly; 51, unlocking part; 511, screw rod; 512, rod body; 513, unlocking plate; 52, compression part; 521, steel wire rope; 522, first fixed pulley; 523, second fixed pulley; 524, ascending plate; 5241, fixed plate; 525, spring; 526, limiting plate; 527, torsion spring; 528, stop plate; 6, storage part; 61, outer cylinder; 62, inner cylinder; 63, channel; 7, guide plate; 8, guide ring. DETAILED DESCRIPTION

[0028] The present application will be further described in details below with reference to the accompanying drawings.

[0029] The following description is provided to enable those skilled in the art to practice the present application. The preferred embodiments described below are only examples of the present application and the skilled in the art can think of other obvious variations within the spirit and scope of the present application. The essential principles of the present application defined in the following description can be used in other embodiments, variations, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present application.

[0030] Those skilled in the art should understand that in the disclosure of the present application, the terms "longitudinal", "transverse", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or position relationship shown in the drawings, which are only for the convenience of the simplified description of the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation of the present application.

[0031] It can be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as a limitation on the number.

[0032] Please refer to Figures 1-9 A compressed air precision filter, comprising a shell 1, an air inlet 11, an air outlet 12 and a filter element 2 inside the shell 1, compressed air enters from the air inlet 11, flows to the center of the filter element 2 through the circumferential surface of the filter element 2, and then exits through the air outlet 12, completing the filtration of air. The filter element 2 is composed of upper and lower end plates 21, outer steel mesh 22, inner steel mesh 23 and inner filter mesh 24 located between the outer steel mesh 22 and the inner steel mesh 23. The outer surface of the filter element 2 is sleeved with a separable outer filter mesh 3, which first filters the air, and then the air passes through the inner filter mesh 24. At this time, the outer filter mesh 3 plays a major role. A cleaning pipe 4 is provided on the shell 1, and a switch valve 41 is provided on the cleaning pipe 4 to prevent the filtered air from flowing out through the cleaning pipe 4. A transmission assembly 5 is provided between the shell 1 and the outer filter mesh 3 for separating the outer filter mesh from the filter element 2. When the outer filter mesh 3 is used for a period of time, the outer filter mesh is separated from the filter element 2 by the transmission assembly, without the need to disassemble the shell. After separation, the inner filter mesh filters the air.

[0033] The cleaning pipe 4 in the shell 1 is located at the center of the filter element 2, facilitating cleaning of the filter element 2. An air outlet pipe 42 is provided on the cleaning pipe 4, which communicates with the cleaning pipe 4. After the cleaning pipe 4 is ventilated, it blows towards the filter element 2 through the air outlet pipe 42, which is opposite to the flow direction of the compressed filtered air, so that impurities fall off the filter element 2.

[0034] A rotating pipe 43 is rotatably provided on the cleaning pipe 4, the air outlet pipe 42 is fixed with the rotating pipe 43 and communicates with the cleaning pipe 4 through the rotating pipe 43, as shown in Figure 2 The air outlet pipe 42 is uniformly distributed on the circumferential surface of the rotating pipe 43 and is in an arc shape. After the cleaning pipe 4 is ventilated, the gas enters the air outlet pipe 42 through the rotating pipe 43, driven by the reverse force of the airflow, so that the air outlet pipe 42 and the rotating pipe 43 rotate on the cleaning pipe 4. Under the action of the air outlet pipe 42, the airflow forms a spiral shape, which is conducive to cleaning the filter element 2. In order to further ensure the formation of spiral airflow, helical blades 44 are fixed on the rotating pipe 43, which are located on the upper side of the filter element 2 and cooperate with the air outlet pipe 42 to form a spiral airflow, which is more conducive to cleaning impurities.

[0035] The bottom of the filter element 2 is provided with a receiving part 6, which includes an outer cylinder 61 and an inner cylinder 62. The outer cylinder 61 is fixedly connected with the inner cylinder 62. The inner cylinder 62 is fixedly connected with the filter element 2 through an arc-shaped connecting plate. The outer cylinder 61 and the inner cylinder 62 form a receiving space. After the outer filter screen 3 is separated from the filter element 2, the outer filter screen 3 is pulled into the space between the outer cylinder 61 and the inner cylinder 62 through the transmission assembly 5. The inner cylinder 62 is fixed to the bottom of the filter element 2 and is used to support the receiving part 6.

[0036] The bottom of the outer cylinder 61 and the inner cylinder 62 is provided with a channel 63. During the compressed air filtering process, water will accumulate in the shell 1. The bottom of the shell 1 is a water outlet. The channel 63 prevents water from accumulating at the bottom of the outer cylinder 61 and the inner cylinder 62.

[0037] The outer cylinder 61 is fixedly connected with symmetrical guide plates 7. The guide plates 7 are arc-shaped plates and are matched with the outer cylinder 61. The upper end of the guide plate 7 is fixed to the upper end of the filter element 2. The guide plate 7 guides the outer filter screen 3 and prevents it from occupying too much space in the radial direction during the separation process from the filter element 2. The guide plate 7 enables the outer filter screen 3 to completely enter the receiving part 6.

[0038] The upper and lower ends of the outer filter screen 3 are fixedly connected with guide rings 8. The guide rings 8 are sleeved with the filter element 2. Specifically, the guide rings 8 are sleeved with the outer steel screen 22. The outer diameter of the guide ring 8 is smaller than the inner diameter of the outer cylinder 61. The outer diameter of the inner cylinder 62 is not greater than the inner diameter of the guide ring 8, preventing the guide ring 8 from colliding with the receiving part 6. During use, the transmission assembly 5 enables the guide ring 8 to enter the receiving part 6. The two guide rings 8 enable the outer filter screen 3 to be separated from the filter element 2.

[0039] The transmission assembly 5 includes an unlocking part 51 and a compression part 52. The compression part 52 includes a steel wire rope 521, a first fixed pulley 522, a second fixed pulley 523, an ascending plate 524, and a spring 525. The first fixed pulley 522 is rotatably connected with the upper guide ring 8. The second fixed pulley 523 is rotatably connected with the outer cylinder 61. The ascending plate 524 is located outside the outer cylinder 61. The ascending plate 524 is in contact with the wall of the outer cylinder 61. The guide plate 7 limits the ascending plate 524. The second fixed pulley 523 is located below the ascending plate 524. One end of the steel wire rope 521 is fixed to the lower guide ring 8. The other end passes through the first fixed pulley 522 and the second fixed pulley 523 and is fixed to the ascending plate 524. The other end passes through the first fixed pulley 522, the second fixed pulley 523, and the ascending plate 524. The spring 525 is in a stretched state. The two ends of the spring 525 are fixed to the upper filter element 2 and the ascending plate 524, respectively. The unlocking part 51 is used to unlock the spring 525 in the stretched state.

[0040] In use, the spring 525 is released from the stretched state by the unlocking portion 51, the spring 525 retracts, pulls the rising plate 524 to move upward, the rising plate 524 pulls the steel wire rope 521; the steel wire rope 521 passes through the second fixed pulley 523 fixed to the bottom of the storage member outer cylinder, converts the upward movement of the rising plate into downward pulling force on the lower guide ring 8, at the same time, the upper guide ring 8 is pulled downward by the first fixed pulley 522, the two guide rings 8 move downward after moving close to each other, drive the outer filter screen 3 to compress and enter the storage member 6. After the outer filter screen 3 is stored, the outer cylinder 61 and the inner cylinder 62 block the impurities from the outer filter screen 3 in the radial direction, the two guide rings 8 block the impurities from the outer filter screen 3 in the upward and downward directions, and the cooperation of the outer cylinder 61, the inner cylinder 62 and the two guide rings 8 prevents the impurities from separating from the outer filter screen 3 under the action of the airflow.

[0041] The two sides of the rising plate 524 are respectively rotationally connected with the limiting plates 526, the torsion spring 527 is arranged between the limiting plate 526 and the rising plate 524, one end of the torsion spring 527 is fixed with the rotation shaft of the limiting plate 526, and the other end is fixed with the rising plate 524. The fixed plate 5241 is fixedly connected to the rising plate 524, and the fixed plate 5241 prevents the limiting plate 526 from rotating upward. The upper side of the limiting plate 526 is fixedly connected with the stop plate 528, and the stop plate 528 corresponds to the limiting plate 526. The spring 525 drives the rising plate 524 to rise, the rising plate 524 drives the limiting plate 526 to rise, the limiting plate 526 contacts the stop plate 528, rotates downward, and is supported by the stop plate 528 after passing through the stop plate 528. The steel wire rope 521 is taut, so that the outer filter screen is stably stored in the storage member 6. Neither blocks the air from entering the filter element, nor prolongs the service life of the filter element.

[0042] The unlocking portion 51 includes a screw rod 511, a rod body 512 and an unlocking plate 513. The rod body 512 and the screw rod 511 are connected with the unlocking plate 513, and the unlocking plate 513 is located on the upper surface of the rising plate 524 and limits the rising plate 524. The screw rod 511 is located outside the shell 1, the rod body 512 is in sliding fit with the shell 1, the screw rod 511 is rotationally connected with a smooth rod, the rod body 512 also extends to the outside of the shell 1, the rod body 512 and the smooth rod outside are fixedly connected to move synchronously, and the shell 1 has a wrapping plate on the lower side. The screw rod 511 is threadedly connected with the wrapping plate. In use, the screw rod 511 is rotated to drive the rod body 512 and the unlocking plate 513 to move, and the limitation on the rising plate 524 is released.

[0043] When the filter element 2 needs to be replaced, the unlocking portion 51 does not affect the movement of the filter element 2 and the compression portion 52. The compression portion 52 is integrally taken out with the filter element 2, and the compression portion 52 can be detachably connected with the filter element 2 (the detachable connection is prior art and is not described). After the outer filter screen 3 is replaced, it is installed on the new filter element 2, thereby saving resources.

[0044] It will be understood by those skilled in the art that the above description and the embodiments of the application shown in the drawings are only by way of example and do not limit the application. The object of the application has been fully and effectively achieved. The function and the structural principle of the application have been shown and described in the embodiments, and the embodiments of the application can be modified or changed in any way without departing from the principle.

Claims

1. A precision compressed air filter, comprising a housing (1), an air inlet (11), an air outlet (12), and a filter element (2) inside the housing (1), characterized in that: The outer surface of the filter element (2) is fitted with a separable outer filter screen (3), the housing (1) is provided with a cleaning pipe (4), the cleaning pipe (4) is provided with a switch valve (41), and a transmission assembly (5) is provided between the housing (1) and the outer filter screen (3) for separating the outer filter screen from the filter element (2); The outer filter (3) is fixed with guide rings (8) at both the top and bottom. The guide rings (8) are sleeved with the filter element (2), and the outer diameter of the guide rings (8) is smaller than the inner diameter of the outer cylinder (61). After the two guide rings (8) approach each other, they move downwards in sync, causing the outer filter (3) to be compressed and enter the storage component (6). The transmission assembly (5) includes an unlocking part (51) and a compression part (52). The compression part (52) includes a wire rope (521), a first fixed pulley (522), a second fixed pulley (523), a rising plate (524), and a spring (525). The first fixed pulley (522) is rotatably engaged with the upper guide ring (8), and the second fixed pulley (523) is rotatably engaged with the outer cylinder (61). The rising plate (524) is located outside the outer cylinder (61). One end of the wire rope (521) is fixed to the lower guide ring (8), and the other end passes around the first fixed pulley (522) and the second fixed pulley (523) and is fixed to the rising plate (524). The spring (525) is in a stretched state, and its two ends are fixed to the upper filter element (2) and the rising plate (524) respectively. The unlocking part (51) is used to unlock the spring (525) in the stretched state.

2. The precision compressed air filter according to claim 1, characterized in that: The cleaning pipe (4) inside the housing (1) is located at the center of the filter element (2). An air outlet pipe (42) is provided on the cleaning pipe (4), and the air outlet pipe (42) is connected to the cleaning pipe (4).

3. A precision compressed air filter according to claim 2, characterized in that: A rotating tube (43) is rotatably mounted on the cleaning tube (4). The air outlet tube (42) is fixed to the rotating tube (43) and is connected to the cleaning tube (4) through the rotating tube (43).

4. A precision compressed air filter according to claim 3, characterized in that: The filter element (2) is provided with a storage component (6) at the bottom. The storage component (6) includes an outer cylinder (61) and an inner cylinder (62). The outer cylinder (61) and the inner cylinder (62) are fixedly connected. The inner cylinder (62) is fixed to the bottom of the filter element (2).

5. A precision compressed air filter according to claim 4, characterized in that: The bottom of the outer cylinder (61) and the inner cylinder (62) are provided with channels (63).

6. A precision compressed air filter according to claim 4, characterized in that: A symmetrical guide plate (7) is fixedly connected to the outer cylinder (61). The guide plate (7) is an arc-shaped plate and is adapted to the outer cylinder (61). The upper end of the guide plate (7) is fixed to the upper end of the filter element (2).

7. A precision compressed air filter according to claim 1, characterized in that: The rising plate (524) is rotatably connected to two sides of a limiting plate (526). A torsion spring (527) is provided between the limiting plate (526) and the rising plate (524). One end of the torsion spring (527) is fixed to the rotating shaft of the limiting plate (526), ​​and the other end is fixed to the rising plate (524).

8. A precision compressed air filter according to claim 1, characterized in that: The unlocking part (51) includes a screw (511), a rod (512) and an unlocking plate (513). The screw (511) is located outside the housing (1), and the rod (512) is in sliding fit with the housing (1).

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