Detachable self-cleaning filter

Abstract

The invention discloses a detachable self-cleaning filter, which relates to the technical field of filters and comprises a shell, a filter element, a quick release lock ring, a self-cleaning unit and a limiting assembly. Circumferential rotation motion is converted into axial pressing force of the filter element through the quick-release locking ring arranged at the opening end of the shell, and a traditional bolt connection mode is replaced; a backwashing nozzle of the self-cleaning unit is integrated on the inner side of the locking ring, and an acute angle is formed between the spraying direction and the axis of the filter element to form a tangential washing flow field; the limiting assembly fixes the relative position of the locking ring and the shell, and operation loosening is prevented. The dismounting time of the filter element in the device is shortened, and the maintenance efficiency is improved; meanwhile, the tangential washing strength of the surface of the filter element is improved through an acute angle spraying and locking ring integrated structure; in addition, mechanical interlocking guarantees the sealing stability, and the leakage risk is completely eradicated.

Description

Technical Field

[0001] The present invention relates to the technical field of filters, and particularly to a detachable self-cleaning filter. Background Art

[0002] In the field of industrial filtration, especially in key industries such as energy and chemical industries where extremely high requirements are placed on equipment reliability and maintenance efficiency, detachable self-cleaning filters play a crucial role. Such filters need to have their filter elements disassembled, cleaned, or replaced regularly to maintain their filtering performance.

[0003] Currently, the mainstream quick-release filter element designs generally rely on a sealing structure pressed by flange bolts. However, this traditional structure has technical bottlenecks in practical applications: every time the filter element is disassembled or installed, multiple flange bolts need to be tightened or loosened one by one. This process is cumbersome and time-consuming, and a single disassembly and assembly operation often takes a long time, severely restricting the maintenance efficiency of the equipment and the availability of the system. For this reason, we propose a detachable self-cleaning filter. Summary of the Invention

[0004] The purpose of the present invention is to provide a detachable self-cleaning filter to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A detachable self-cleaning filter includes a housing, a filter element, a quick-release lock ring, a self-cleaning unit, and a limiting component. The quick-release lock ring is provided at the open end of the housing and axially compresses or releases the filter element by circumferential rotation; the self-cleaning unit includes a backwash nozzle, and the nozzle is integrated inside the quick-release lock ring, and the spraying direction of the nozzle forms an acute angle with the axis of the filter element; the limiting component is provided outside the lock ring to fix the relative position of the lock ring and the housing.

[0006] Preferably, a sealing strip is fixedly provided at the bottom inside the lock ring and deforms to fill the assembly gap between the housing and the filter element when the lock ring rotates and compresses.

[0007] Preferably, the self-cleaning unit further includes a flow guide cover, the flow guide cover is fixed to the inner wall of the lock ring and surrounds the nozzle, and the outlet end of the flow guide cover expands to form a conical flow guide surface.

[0008] Preferably, turbulence holes are provided on the inner wall of the flow guide cover.

[0009] Preferably, the flow guide cover is divided into three sections: the inlet section is a straight cylinder section provided outside the nozzle; the transition section is an arc-shaped curved surface, and the turbulence holes are provided in this section; the outlet section is an expanding frustum shape.

[0010] Preferably, the limiting component includes an elastic positioning tongue, a positioning groove, and a limiting protrusion. The positioning groove is provided on the outer wall of the housing; the elastic positioning tongue is provided on the outer edge of the locking ring, and the elastic positioning tongue snaps into the positioning groove when the locking ring rotates to the pressing position; a plurality of limiting protrusions are provided and evenly arranged on the outside of the locking ring, and spiral grooves are evenly distributed on the inner side of the housing, and the limiting protrusions are slidably matched with the spiral grooves.

[0011] Preferably, the elastic positioning tongue includes a bracket, a compression spring, and a positioning rod; the bracket is fixedly provided on the outer edge of the locking ring; the positioning rod is slidably arranged in the bracket; both ends of the compression spring are respectively fixed to the bracket and the positioning rod, driving the positioning rod to fit into the positioning groove.

[0012] Preferably, a magnetic block is embedded at the root of the positioning rod, and a magnetic induction switch is fixedly provided at the bottom of the positioning groove for feeding back the locking state to the control system.

[0013] Preferably, guide fins are fixedly arranged circumferentially on the inner wall of the fairing, including: front straight-wall airfoil fins provided at the inlet section of the fairing; rear spiral torsion fins provided at the transition section of the fairing.

[0014] Preferably, the edge of the outlet section of the fairing is a serrated skirt.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. Through the circumferential rotation design of the quick-release locking ring and the cooperation with the limiting component, the present invention realizes the quick axial pressing and release of the filter element. This design completely abandons the operation of tightening bolts one by one, shortens the single disassembly and assembly time, reduces the equipment downtime, and improves the equipment maintenance efficiency and system availability.

[0017] 2. The present invention directly integrates the backwashing nozzle inside the quick-release locking ring. This integrated design is not only compact in structure but also ensures the accurate relative position between the nozzle and the filter element when the locking ring rotates in place. Through the acute-angle spraying design and in coordination with the conical guiding surface, turbulent flow holes, and spiral torsion fins of the fairing and other structures, a high-intensity eddy current scouring effect with a tangential component can be formed, improving the peeling efficiency of impurities on the surface of the filter element. Enhance the self-cleaning ability of the equipment, extend the service life of the filter element, and reduce the dependence and frequency on manual disassembly and cleaning.

[0018] 3. The sealing strip provided at the bottom inside the locking ring deforms when the locking ring rotates and presses, dynamically filling the assembly gap between the housing and the filter element, ensuring the sealing reliability in the quick-release state and preventing the risk of medium leakage. At the same time, the magnetic block in the limiting component cooperates with the magnetic induction switch at the bottom of the positioning groove, and can timely feed back the locking state information of the locking ring to the control system. It not only realizes the intelligent monitoring of the locking state, prevents misoperation caused by the locking ring not being in place, but also improves the active safety and controllability of the overall operation of the equipment. Description of the Drawings

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a schematic diagram of the structure of the filter element part of the present invention;

[0021] Figure 3 is a schematic diagram of the internal structure of the housing of the present invention;

[0022] Figure 4 is a schematic diagram of the quick-release lock ring structure of the present invention;

[0023] Figure 5 is a schematic diagram of the connection between the elastic positioning tongue structure and the housing of the present invention;

[0024] Figure 6 is a schematic diagram of the elastic positioning tongue structure of the present invention;

[0025] Figure 7 is a schematic diagram of the nozzle orientation of the present invention;

[0026] Figure 8 is a schematic diagram of the flow guide cover structure of the present invention.

[0027] In the figure: 1 - housing; 2 - filter element; 3 - lock ring; 4 - self-cleaning unit; 5 - nozzle; 6 - limit assembly; 7 - sealing strip; 8 - flow guide cover; 9 - turbulence hole; 10 - elastic positioning tongue; 11 - positioning groove; 12 - limit protrusion; 13 - spiral groove; 14 - bracket; 15 - compression spring; 16 - positioning rod; 17 - magnetic block; 18 - magnetic induction switch; 19 - flow guide fin; 20 - serrated skirt. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Embodiment:

[0030] Please refer to Figures 1 - 8, as shown in the figure, a detachable self-cleaning filter includes a housing 1, a filter element 2, a quick-release lock ring 3, a self-cleaning unit 4 and a limit assembly 6. The quick-release lock ring 3 is arranged at the open end of the housing 1, and directly converts the circumferential rotational motion into the axial pressing force of the filter element 2, replacing the traditional bolt-by-bolt tightening process, and realizing the efficient operation of "rotation means locking". The self-cleaning unit 4 includes a backwashing nozzle 5. The nozzle 5 is integrated inside the quick-release lock ring 3, and the spraying direction of the nozzle 5 forms an acute angle with the axis of the filter element 2 to form a tangential scouring flow field. The limit assembly 6 is arranged outside the lock ring 3 to provide two-way constraints: preventing the lock ring 3 from accidentally rotating and loosening, and ensuring the accurate alignment of the lock ring 3 with the housing 1 when it is pressed, constituting the reliability basis of the quick-release function.

[0031] Among them, a sealing strip 7 is fixedly arranged at the bottom inside the lock ring 3. When the lock ring 3 rotates and presses, it deforms to fill the assembly gap between the housing 1 and the filter element 2, breaking through the limitation of traditional static sealing, forming a dynamic sealing interface that adapts to pressure, and still maintaining the sealing integrity under frequent disassembly and assembly conditions, eliminating the risk of medium leakage.

[0032] At the same time, the self-cleaning unit 4 further includes a flow guide cover 8. The flow guide cover 8 is fixed to the inner wall of the lock ring 3 and surrounds the nozzle 5. The outlet end of the flow guide cover 8 expands to form a conical flow guide surface, and turbulent flow holes 9 are provided on the inner wall of the flow guide cover 8. The expanded conical flow guide surface at the outlet end diffuses the jet flow of the nozzle 5 into a fan-shaped flushing surface covering the surface of the filter element 2; the turbulent flow holes 9 provided on the inner wall actively introduce external fluid, stimulate the von Karman vortex street effect inside the jet flow, convert part of the pressure energy into turbulent kinetic energy, and enhance the impurity stripping force.

[0033] It should be noted that the flow guide cover 8 is divided into three sections: the inlet section is a straight cylinder section, arranged outside the nozzle 5 to restrict the initial jet flow form; the transition section is an arc-shaped curved surface, and the turbulent flow holes 9 are arranged in this section. The energy loss is reduced through the curved surface flow guide, and the turbulent flow holes 9 on its wall further strengthen the fluid shear effect; the outlet section is an expanding frustum shape to achieve uniform diffusion of the flow field and avoid flushing dead angles. The three sections cooperate to improve the flushing efficiency;

[0034] Among them, flow guide fins 19 are fixedly arranged circumferentially on the inner wall of the flow guide cover 8, including: the front straight-wall airfoil fins, arranged in the inlet section of the flow guide cover 8 to rectify and accelerate the jet flow and improve the initial kinetic energy; the rear spiral twisted fins, arranged in the transition section of the flow guide cover 8 to induce the fluid to generate a swirling motion, and cooperate with the turbulent flow holes 9 to enhance the vortex strength and improve the dirt entrainment efficiency on the surface of the filter element 2;

[0035] At the same time, the edge of the outlet section of the flow guide cover 8 is a serrated skirt 20. By periodically disturbing the boundary layer of the flow field, the steady development of the boundary layer is destroyed, the fluid separation phenomenon is inhibited, and at the same time, a micro-scale vortex group is formed, extending the coverage range of the jet flow and reducing the flushing blind area in the edge area of the filter element 2.

[0036] In this technical solution, the limit assembly 6 includes an elastic positioning tongue 10, a positioning groove 11, and a limit protrusion 12. The positioning groove 11 is provided on the outer wall of the housing 1; the elastic positioning tongue 10 is provided on the outer edge of the lock ring 3. When the lock ring 3 rotates to the pressing position, the elastic positioning tongue 10 snaps into the positioning groove 11; a plurality of limit protrusions 12 are provided and evenly arranged on the outer side of the lock ring 3. A uniformly distributed spiral groove 13 is provided on the inner side of the housing 1, and the limit protrusions 12 are slidably engaged with the spiral groove 13. The elastic positioning tongue 10 automatically snaps into the positioning groove 11 of the housing 1 when the lock ring 3 rotates to the pressing position, providing a main locking signal. The plurality of limit protrusions 12 are slidably engaged with the spiral groove 13 on the inner wall of the housing 1, converting the rotational motion into a precise axial displacement, while limiting the rotation angle to prevent damage caused by over-travel;

[0037] Meanwhile, the elastic positioning tongue 10 includes a bracket 14, a compression spring 15, and a positioning rod 16; the bracket 14 is fixedly provided on the outer edge of the lock ring 3, providing a rigid guiding track; the positioning rod 16 is slidably arranged inside the bracket 14; both ends of the compression spring 15 are respectively fixed to the bracket 14 and the positioning rod 16, continuously applying an embedding force to ensure the tight engagement of the positioning rod 16 with the positioning groove 11; the sliding design of the positioning rod 16 allows for automatic rebound embedding when the lock ring 3 is locked, realizing a "one-key" operation experience.

[0038] In this technical solution, a magnetic block 17 is embedded at the root of the positioning rod 16, and a magnetic induction switch 18 is fixedly provided at the bottom of the positioning groove 11 for feeding back the locking state to the control system. When the positioning rod 16 is completely snapped into the positioning groove 11, the magnetic block 17 triggers the magnetic induction switch 18, and the generated electrical signal is fed back to the control system in real time, realizing remote monitoring and abnormal alarm of the locking state, and eliminating manual misjudgment.

[0039] The specific operation steps are as follows:

[0040] The first step: Install and lock the filter element 2,

[0041] Insert the filter element 2 into the interior of the housing 1. The end face of the filter element 2 abuts against the internal limit step of the housing 1. Slip the quick-release lock ring 3 integrating the self-cleaning unit 4 over the open end of the housing 1, aligning the limit protrusions 12 on the outer side of the lock ring 3 with the entrance of the spiral groove 13 on the inner wall of the housing 1. Rotate the lock ring 3 clockwise. The limit protrusions 12 slide along the spiral groove 13, converting the rotational motion into an axial displacement, pushing the filter element 2 towards the bottom of the housing 1 for pressing. The sealing strip 7 inside the lock ring 3 undergoes radial expansion and deformation under the axial pressure, filling the assembly gap between the housing 1 and the filter element 2 to form a leak-free seal;

[0042] When the lock ring 3 rotates to the pressing position: The positioning rod 16 of the elastic positioning tongue 10 snaps into the positioning groove 11 of the housing 1 under the drive of the compression spring 15, emitting a "click" mechanical locking sound; the magnetic block 17 at the root of the positioning rod 16 triggers the magnetic induction switch 18 at the bottom of the positioning groove 11, sending an "already locked" electrical signal to the control system;

[0043] Step 2: The self-cleaning process is started.

[0044] The control system receives the differential pressure signal of the filter element 2 or the timing instruction, opens the backwashing valve, and the high-pressure fluid is ejected from the backwashing nozzle 5 inside the locking ring 3. Since the nozzle 5 forms an acute angle with the axis of the filter element 2, a tangential scouring force is formed.

[0045] The jet flow enters the inlet section of the flow guide cover 8 and is rectified and accelerated by the straight-wall airfoil fins. When flowing through the transition section, the spiral torsion fins induce the fluid to swirl in, mix with the external fluid introduced by the turbulent holes 9, and stimulate a high-intensity vortex street. The expanding conical outlet section diffuses the rotating jet flow into a fan-shaped washing surface covering the entire surface of the filter element 2. The serrated skirt 20 at its edge destroys the boundary layer and extends the jet coverage range.

[0046] The combined fluid effect efficiently strips the impurities on the surface of the filter element 2, and the impurities are discharged through the sewage discharge channel.

[0047] Step 3: The filter element 2 is disassembled and maintained.

[0048] Pull out the positioning rod 16 of the elastic positioning tongue 10 on the locking ring 3 outwards, overcome the resistance of the compression spring 15 and disengage from the positioning groove 11. The magnetic induction switch 18 triggers the "unlocked" signal. Rotate the locking ring 3 counterclockwise, and the limit protrusion 12 retracts along the spiral groove 13 to release the axial pressing force on the filter element 2. The sealing strip 7 rebounds and resets, and directly axially pull out the locking ring 3 and the integrated self-cleaning unit 4, and the filter element 2 is synchronously disengaged from the housing 1 with the locking ring 3 to complete the disassembly.

[0049] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0050] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A detachable self-cleaning filter, comprising a housing (1) and a filter element (2), characterized in that Also included are: A quick-release lock ring (3) is provided at the open end of the housing (1) to axially compress or release the filter element (2) by circumferential rotation; A self-cleaning unit (4), including a backwash nozzle (5), the nozzle (5) is integrated inside the quick-release lock ring (3), and the spraying direction of the nozzle (5) forms an acute angle with the axis of the filter element (2); A limiting component (6) is provided outside the lock ring (3) to fix the relative position of the lock ring (3) and the housing (1).

2. The detachable self-cleaning filter according to claim 1, wherein: A sealing strip (7) is fixedly provided at the bottom inside the lock ring (3), and deforms to fill the assembly gap between the housing (1) and the filter element (2) when the lock ring (3) rotates and compresses.

3. The detachable self-cleaning filter according to claim 1, wherein: The self-cleaning unit (4) further includes a flow guide cover (8), the flow guide cover (8) is fixed to the inner wall of the lock ring (3) and surrounds the nozzle (5), and the outlet end of the flow guide cover (8) expands to form a conical flow guide surface.

4. The detachable self-cleaning filter according to claim 3, characterized in that: Turbulence holes (9) are provided on the inner wall of the flow guide cover (8).

5. The detachable self-cleaning filter according to claim 4, characterized in that: The flow guide cover (8) is divided into three sections: the inlet section is a straight cylinder section provided outside the nozzle (5); the transition section is an arc-shaped curved surface, and the turbulence holes (9) are provided in this section; the outlet section is an expanding frustum shape.

6. The detachable self-cleaning filter according to claim 1, characterized in that: The limiting component (6) includes an elastic positioning tongue (10), a positioning groove (11) and a limiting protrusion (12), the positioning groove (11) is provided on the outer wall of the housing (1); the elastic positioning tongue (10) is provided on the outer edge of the lock ring (3), and the elastic positioning tongue (10) snaps into the positioning groove (11) when the lock ring (3) rotates to the compression position; a plurality of limiting protrusions (12) are provided and evenly arranged on the outside of the lock ring (3), and spiral grooves (13) are evenly distributed on the inside of the housing (1), and the limiting protrusions (12) are slidably matched with the spiral grooves (13).

7. The detachable self-cleaning filter according to claim 6, wherein: The elastic positioning tongue (10) includes a bracket (14), a compression spring (15) and a positioning rod (16); the bracket (14) is fixedly provided on the outer edge of the lock ring (3); the positioning rod (16) slides inside the bracket (14); both ends of the compression spring (15) are respectively fixed to the bracket (14) and the positioning rod (16) to drive the positioning rod (16) to engage with the positioning groove (11).

8. The detachable self-cleaning filter according to claim 7, wherein: A magnetic block (17) is embedded at the root of the positioning rod (16), and a magnetic induction switch (18) is fixedly provided at the bottom of the positioning groove (11) to feedback the locking state to the control system.

9. The detachable self-cleaning filter according to claim 5, wherein: Flow guide fins (19) are fixedly provided circumferentially on the inner wall of the flow guide cover (8), including: front-segment straight-wall airfoil fins provided in the inlet section of the flow guide cover (8); rear-segment spiral torsion fins provided in the transition section of the flow guide cover (8).

10. The detachable self-cleaning filter according to claim 9, characterized in that: The edge of the outlet section of the flow guide cover (8) is a serrated skirt (20).

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