Fine filter convenient to maintain

Abstract

The invention relates to the technical field of filters, in particular to a fine filter convenient to maintain, which comprises a tank body, the lower end of the tank body is provided with a liquid inlet and a drain outlet, the upper end of the tank body is provided with a liquid outlet, and the top end of the tank body is provided with a cover plate; a mounting plate is slidably mounted in the tank body, a spring is arranged at the upper end of the mounting plate, a plurality of filter elements are arranged on the mounting plate, scraping strips matched with the filter elements are arranged on the outer side of each filter element, the filter elements are rotatably connected with the mounting plate through bearings, extension rods are fixed to the bottom ends of the filter elements, and sliding sleeves sleeve the extension rods. When one side of the filter element is blocked and the liquid entering flow is kept unchanged, the hydraulic pressure below the mounting plate in the tank body is correspondingly increased to push the mounting plate to slowly move upwards, so that the filter element is driven to slowly rotate on the mounting plate through the matching of the spiral guide groove and the sliding sleeve, and the filter element is steered; long-time alignment of one side of the filter element to the liquid inlet is avoided, and the utilization rate of the filter element is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of filters, in particular to a fine filter that is easy to maintain. Background Art

[0002] A fine filter is a device used for precise filtration. It typically consists of a filter element, housing, and accessories such as a bleed valve, differential pressure gauge, drain valve, and sampling connector. The liquid or gas to be filtered enters the lower portion of the filter housing through the inlet pipe and flows through the filter element from outside to inside. Coarser particles immediately settle and are discharged through the drain port, while smaller particles are intercepted by the filter element. Finally, the clean fluid is collected by the filter element tray and flows out of the filter through the outlet pipe.

[0003] Currently, the filter elements in the filter are mostly fixedly installed in the housing. The impurities adhering to the side of the filter element facing the liquid inlet are generally much greater than those on the other side, resulting in low filter element utilization. At the same time, the current filter element does not have the function of automatic cleaning. The filter element needs to be maintained regularly after use, which has a high maintenance cost. Therefore, we propose a fine filter that is easy to maintain to solve the above problems. Summary of the Invention

[0004] The present invention aims to provide a fine filter that is easy to maintain, in view of the defect that most filter elements in the prior art are fixedly installed in a housing, and impurities adhering to the side of the filter element facing the liquid inlet are generally much greater than those on the other side, resulting in low utilization of the filter element.

[0005] The present invention is achieved through the following technical solutions:

[0006] A fine filter that is easy to maintain, comprising a tank body, a liquid inlet and a sewage outlet provided at the lower end of the tank body, a liquid outlet provided at the upper end of the tank body, a cover plate provided at the top end of the tank body, a connecting flange provided on the cover plate, a positioning ring fixed inside the tank body, a plurality of lugs provided below the positioning ring, the plurality of lugs circumferentially distributed on the inner wall of the tank body and fixedly connected to the tank body;

[0007] A mounting plate is provided between the ear plate and the positioning ring, the mounting plate is slidably matched with the tank body, a spring is provided between the mounting plate and the positioning plate, and a plurality of filter elements are provided on the mounting plate, and a scraper strip adapted to the outer side of each filter element is provided, and the scraper strip is fixed to the mounting plate;

[0008] The plurality of filter elements are rotatably connected to the mounting plate via bearings, and a filtered liquid outflow outlet is provided at the top of each filter element, an extension rod is fixed to the bottom end of each filter element, a spiral guide groove is provided on the extension rod, and a sliding sleeve is sleeved on the extension rod, and the sliding sleeve is fixed to the inner wall of the tank body through a mounting bracket, and a roller is installed on one inner wall of the sliding sleeve, and the roller is located in the guide groove;

[0009] The upper side of the mounting plate is provided with a blocking mechanism, which comprises a cover above each filter element, a plurality of covers are fixedly connected through a connecting frame, the connecting frame is fixed on the positioning ring through an elastic metal strip, and a pull rope is fixed between the connecting frame and the mounting plate.

[0010] In a preferred embodiment of the present application, the liquid inlet is located below the mounting plate, and the liquid outlet is located above the positioning ring.

[0011] In a preferred embodiment of the present application, a guide rod is fixed between each ear plate and the positioning ring, the guide rod penetrates the mounting plate, and the spring is sleeved on the guide rod, the arrangement of the guide rod improves the stability of the mounting plate during movement, and also improves the stability of the spring during compression and rebound.

[0012] In a preferred embodiment of the present application, the arc-shaped outer wall of the mounting plate is attached to the inner wall of the tank body, and the mounting plate and the tank body are in sliding fit, so that liquid cannot flow out between the mounting plate and the tank body.

[0013] In a preferred embodiment of the present application, a groove is formed in the bottom end of the cover, the groove is matched with the liquid outlet, and a sealing ring is arranged on the inner wall of the groove, thereby improving the sealing performance of the liquid outlet after being connected with the groove.

[0014] In a preferred embodiment of the present application, when the elastic metal strip is in a natural state, the blocking mechanism is located below the positioning ring, so that the liquid outlet can push the blocking mechanism to bend upward during the upward movement of the filter element, thereby making the cover away from the liquid outlet and discharging the filtered liquid.

[0015] In a preferred embodiment of the present application, the connecting flange is used for installing an exhaust pipe or a medium adding port, and different parts can be installed according to the application requirements.

[0016] In a preferred embodiment of the present application, a lifting lug is arranged at the top of the cover plate, which is used for carrying the device.

[0017] The present application has the following advantages:

[0018] 1. Compared with the existing filter, when one side of the filter element is blocked, the liquid pressure below the mounting plate in the tank body increases correspondingly under the condition that the liquid inlet flow remains unchanged, the mounting plate is slowly pushed upward, and the filter element is slowly rotated on the mounting plate through the cooperation of the spiral guide groove and the sliding sleeve, so that the filter element is turned, the situation that one side of the filter element is aligned with the liquid inlet for a long time is avoided, and the utilization rate of the filter element is improved.

[0019] 2、when the filter core is blocked to a certain degree, the installation plate rises to drive the liquid outlet on the filter core to insert into the cover, the liquid outlet on the filter core is shielded, the hydraulic pressure below the installation plate is rapidly increased, the rotation speed of the filter core is increased, the impurities on the surface of the filter core are scraped off by the scraping strip, the filter core is cleaned, the maintenance time of the filter core is prolonged, and the filter core is maintained. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a front view of the fine filter convenient to maintain of the application;

[0021] Figure 2 It is a structure schematic view of the inside of the fine filter convenient to maintain of the application;

[0022] Figure 3 It is Figure 2 It is a structure schematic view of A in the middle;

[0023] Figure 4 It is a structure schematic view of the upper surface of the plugging mechanism in the fine filter convenient to maintain of the application;

[0024] Figure 5 It is a structure schematic view of the lower end of the plugging mechanism in the fine filter convenient to maintain of the application;

[0025] Figure 6 It is a structure schematic view of the installation of the sliding sleeve and the extension rod in the fine filter convenient to maintain of the application.

[0026] In the figure: 1, tank body; 2, liquid inlet; 3, pollution outlet; 4, liquid outlet; 5, cover plate; 51, connecting flange; 52, lifting lug; 6, positioning ring; 7, ear plate; 8, guide rod; 9, installation plate; 10, spring; 11, filter core; 12, liquid outlet; 13, bearing; 14, scraping strip; 15, mounting frame; 16, sliding sleeve; 161, roller; 17, extension rod; 171, guide groove; 18, plugging mechanism; 181, cover; 182, connecting frame; 183, elastic metal strip; 184, groove; 19, pull rope. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present application are described in detail below with reference to the accompanying drawings, so that the advantages and features of the present application can be more easily understood by those skilled in the art, and the protection scope of the present application is more clearly defined. The directions mentioned in the present application, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., are only the directions of the attached drawings. Therefore, the directions used are used to explain and understand the present application, not to limit the present application.

[0028] As Figures 1-6The illustrated embodiment shows a fine filter that is easy to maintain and is used for filtering liquids. The filter comprises a tank body 1, a liquid inlet 2 and a sewage outlet 3 being provided at the lower end of the tank body 1, and a liquid outlet 4 being provided at the upper end of the tank body 1. A cover plate 5 is provided at the top end of the tank body 1, which is connected to the tank body 1 by bolts and has a connecting flange 51 provided on the cover plate 5. The connecting flange 51 is used for installing an exhaust pipe or a medium addition port. Different components can be installed according to application requirements. A lifting lug 52 is provided at the middle of the top end of the cover plate 5 for transporting the device.

[0029] A positioning ring 6 is fixed inside the tank body 1, and a plurality of lugs 7 are provided below the positioning ring 6. The plurality of lugs 7 are circumferentially distributed on the inner wall of the tank body 1 and are fixedly connected to the tank body 1.

[0030] A mounting plate 9 is provided between the ear plate 7 and the positioning ring 6. The arc-shaped outer wall of the mounting plate 9 fits the inner wall of the tank body 1, and the mounting plate 9 and the tank body 1 slide together. Liquid cannot flow out from between the mounting plate 9 and the tank body 1. It should be noted that the liquid inlet 2 is located below the mounting plate 9, and the liquid outlet 4 is located above the positioning ring 6.

[0031] A guide rod 8 is fixed between each ear plate 7 and the positioning ring 6. The guide rod 8 passes through the mounting plate 9 and slides with it. A spring 10 is provided between the mounting plate 9 and the positioning plate. The spring 10 is sleeved on the guide rod 8. The setting of the guide rod 8 improves the stability of the mounting plate 9 when it moves, and also improves the stability of the spring 10 when it is compressed and rebounded. A plurality of filter elements 11 are provided on the mounting plate 9. The outer side of each filter element 11 is provided with a scraping strip 14 adapted thereto. The scraping strip 14 is fixed to the mounting plate 9, and impurities on the filter element 11 are scraped off by the scraping strip 14.

[0032] Multiple filter elements 11 are rotatably connected to the mounting plate 9 via bearings 13, and the top of each filter element 11 is provided with an outflow port 12 for filtered liquid. An extension rod 17 is fixed to the bottom end of each filter element 11. The extension rod 17 is concentrically arranged with the filter element 11 and is provided with a spiral guide groove 171. A sliding sleeve 16 is sleeved on the extension rod 17. The sliding sleeve 16 is fixed to the inner wall of the tank body 1 through a mounting bracket 15, and a roller 161 is installed on one inner wall of the sliding sleeve 16. The roller 161 is located in the above-mentioned guide groove 171. When the filter element 11 rises, the roller 161 moves in the guide groove 171, thereby driving the filter element 11 to rotate through the spiral guide groove 171.

[0033] Secondly, the upper side of the mounting plate 9 is provided with a blocking mechanism 18, the blocking mechanism 18 comprises a cover 181 located above each filter element 11, the bottom end of the cover 181 is provided with a groove 184, the groove 184 is matched with the flow outlet 12, and the inner wall of the groove 184 is provided with a sealing ring, so that the sealing performance of the flow outlet 12 after being connected with the groove 184 is improved, a plurality of covers 181 are fixedly connected through a connecting frame 182, the connecting frame 182 is fixed on the positioning ring 6 through an elastic metal strip 183, and the connecting frame 182 and the mounting plate 9 are fixedly connected with the pull rope 19.

[0034] Specifically, when the elastic metal strip 183 is in a natural state, the blocking mechanism 18 is located below the positioning ring 6, so that, during the rising process of the filter element 11, the flow outlet 12 can push the blocking mechanism 18 to bend upwards, so that the cover 181 is away from the flow outlet 12, the filtered liquid is discharged, the pressure below the mounting plate 9 is reduced, the mounting plate 9 is pushed to descend by the spring 10, and during the descending process of the mounting plate 9, the elastic metal strip 183 is bent downwards by the pull rope 19, so that the blocking mechanism 18 is reset, and the next operation is facilitated.

[0035] In the embodiment, the liquid to be filtered enters the tank 1 from the liquid inlet 2, is filtered by the filter element 11, flows to the upper side of the mounting plate 9 from the flow outlet 12, and then flows out from the liquid outlet 4;

[0036] When one side of the filter element 11 is blocked, the liquid pressure below the mounting plate 9 in the tank 1 increases correspondingly under the condition that the liquid inlet flow remains unchanged, so that the mounting plate 9 is slowly moved upwards, at this time, the filter element 11 is slowly rotated on the mounting plate 9 by the cooperation of the spiral-shaped guide groove 171 and the sliding sleeve 16, the filter element 11 is turned, and the situation that one side of the filter element 11 is aligned with the liquid inlet 2 for a long time is avoided.

[0037] When the filter element 11 is blocked to a certain extent, the flow outlet 12 on the filter element 11 is inserted into the cover 181 by the rising of the mounting plate 9, the liquid flow outlet 12 on the filter element 11 is shielded, the liquid pressure below the mounting plate 9 increases rapidly, the mounting plate 9 is rapidly raised, the rotation speed of the filter element 11 is increased, the impurities on the surface of the filter element 11 are scraped off by the scraper 14 during the rotation of the filter element 11, the filter element 11 is cleaned, the time for maintaining the filter element 11 is prolonged, the filter element 11 is maintained, when the filter element 11 is raised to a certain extent, the elastic metal strip 183 is bent in the opposite direction, the blocking mechanism 18 is away from the flow outlet 12, and then the filtered liquid flows out from the flow outlet 12 again, the liquid pressure below the mounting plate 9 decreases, the mounting plate 9 is lowered by the spring 10, and during the descending process of the mounting plate 9, the elastic metal strip 183 is bent downwards by the pull rope 19, so that the blocking mechanism 18 is reset, and the next cleaning operation of the filter element 11 is facilitated.

[0038] It should be noted that the parts of the present application not involved are the same as the prior art or can be realized by using the prior art; the various drives in the present application can be realized by using corresponding power structures such as air cylinders, oil cylinders, electric cylinders and motors in cooperation with connecting rods and guide rods, and are not limited to the description in the specification and the structure in the drawings.

[0039] In the description of the embodiments of the present application, unless explicitly defined and limited otherwise, the terms "mounting", "connecting", "connecting", "setting", "provided with" and the like should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, can be indirectly connected through an intermediate medium, and can be connected inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0040] The above-described embodiments only express several embodiments of the present application, which are described in detail and specifically, but should not be understood as a limitation on the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A fine filter that is easy to maintain, comprising a tank body (1), wherein the lower end of the tank body (1) is provided with a liquid inlet (2) and a sewage outlet (3), and the upper end of the tank body (1) is provided with a liquid outlet (4), and the top end of the tank body (1) is provided with a cover plate (5), and the cover plate (5) is provided with a connecting flange (51), characterized in that: A positioning ring (6) is fixed inside the tank body (1), and a plurality of lug plates (7) are provided below the positioning ring (6). The plurality of lug plates (7) are circumferentially distributed on the inner wall of the tank body (1) and are fixedly connected to the tank body (1); A mounting plate (9) is provided between the ear plate (7) and the positioning ring (6), the mounting plate (9) is in sliding engagement with the tank body (1), a spring (10) is provided between the mounting plate (9) and the positioning plate, and a plurality of filter elements (11) are provided on the mounting plate (9), each filter element (11) is provided with a scraper (14) adapted thereto on its outer side, and the scraper (14) is fixed to the mounting plate (9); The plurality of filter elements (11) are rotatably connected to the mounting plate (9) via bearings (13), and the top of each filter element (11) is provided with an outlet (12) for filtered liquid, and the bottom of each filter element (11) is fixed with an extension rod (17), the extension rod (17) is provided with a spiral guide groove (171), and a sliding sleeve (16) is sleeved on the extension rod (17), the sliding sleeve (16) is fixed to the inner wall of the tank body (1) via a mounting frame (15), and a roller (161) is installed on one side inner wall of the sliding sleeve (16), and the roller (161) is located in the above-mentioned guide groove (171); A blocking mechanism (18) is provided above the mounting plate (9), and the blocking mechanism (18) includes a sealing cover (181) located above each filter element (11). The multiple sealing covers (181) are fixedly connected via a connecting frame (182), and the connecting frame (182) is fixed to the positioning ring (6) via an elastic metal strip (183), and a drawstring (19) is fixed between the connecting frame (182) and the mounting plate (9).

2. The fine filter easy to maintain according to claim 1, characterized in that: The liquid inlet (2) is located below the mounting plate (9), and the liquid outlet (4) is located above the positioning ring (6).

3. The fine filter easy to maintain according to claim 1, characterized in that: A guide rod (8) is fixed between each ear plate (7) and the positioning ring (6), the guide rod (8) passes through the mounting plate (9), and the spring (10) is sleeved on the guide rod (8).

4. The fine filter easy to maintain according to claim 3, characterized in that: The arc-shaped outer wall of the mounting plate (9) fits the inner wall of the tank body (1), and the mounting plate (9) and the tank body (1) are in sliding cooperation.

5. The fine filter easy to maintain according to claim 1, characterized in that: A groove (184) is provided at the bottom end of the sealing cover (181), the groove (184) is adapted to the outflow port (12), and a sealing ring is provided on the inner wall of the groove (184).

6. The fine filter easy to maintain according to claim 1, characterized in that: When the elastic metal strip (183) is in a natural state, the blocking mechanism (18) is located below the positioning ring (6).

7. The fine filter easy to maintain according to claim 1, characterized in that: The connecting flange (51) is used for installing an exhaust pipe or a medium adding port.

8. The fine filter easy to maintain according to claim 1, characterized in that: A lifting lug (52) is provided at the middle portion of the top end of the cover plate (5).

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