High-pressure fan inlet filter screen quick-release structure capable of preventing foreign matter from being sucked

Abstract

The invention belongs to the technical field of high-pressure fan corollary equipment, and particularly relates to a high-pressure fan inlet filter screen quick-release structure capable of preventing foreign matter from being sucked in, which comprises a high-pressure fan body, an air inlet is fixedly connected to the side wall of the high-pressure fan body; a filter screen body is arranged on one side of the air inlet; one end of the filter screen body is fixedly connected with a supporting block; by means of the elastic clamping and linkage unlocking structure, the core defects that a traditional fixing mode of an existing high-pressure fan inlet filter screen is tedious in disassembly and assembly and depends on tools are overcome, tool-free rapid disassembly and assembly are achieved, and the maintenance efficiency is greatly improved; compared with the prior art, the structure is optimized aiming at the high-frequency vibration environment of the high-pressure fan, so that outstanding substantive features are formed, and the phenomenon of clamping looseness or clamping is effectively avoided; maintenance convenience and structural reliability are improved, installation precision can be automatically guaranteed, the problem of abnormal air inlet resistance or filtering failure caused by installation deviation is avoided, and stable operation of the high-pressure fan is guaranteed.

Description

Technical Field

[0001] This invention belongs to the technical field of high-pressure blower supporting equipment, specifically a quick-release structure for the inlet filter screen of a high-pressure blower to prevent foreign objects from being sucked in. Background Technology

[0002] High-pressure blowers are widely used in industrial production, ventilation, and material handling due to their high pressure and stable air delivery. During operation, if dust, particles, fibers, or other foreign matter in the air enters the blower, it can easily cause impeller wear, bearing jamming, and airway blockage. This not only reduces the blower's efficiency and lifespan but can also lead to equipment shutdown or even safety accidents. Therefore, high-pressure blowers typically have a filter at the inlet to filter the incoming air, intercepting foreign matter and ensuring normal operation. Currently, most high-pressure blower inlet filters are fixedly installed, using bolts, welding, or simple clips to attach to the inlet. Their core function is to filter the incoming air and reduce the intrusion of foreign matter.

[0003] However, existing high-pressure blower inlet filters have significant technical shortcomings in practical use, particularly in terms of ease of disassembly and maintenance. Traditional filter fixing methods mostly rely on tools; for example, bolt-fastened filters require wrenches for disassembly and installation, making the process cumbersome and time-consuming. Even with simple snap-fit ​​structures, the unlocking method is often single-sided and single-point, requiring precise alignment and force during disassembly and assembly. Furthermore, under long-term high-frequency vibration, the snaps are prone to jamming or loosening and failure. This results in low efficiency for cleaning, replacement, and maintenance of the filters, failing to meet the demands of rapid maintenance and efficient resumption of production in industrial settings. Frequent tool handling also increases the workload of operators.

[0004] In addition, the existing technology has many related defects that need to be addressed: First, during the disassembly of the filter screen, the air inlet is unprotected, and foreign objects can easily enter the fan during this period, causing "maintenance gap contamination"; Second, the existing filter screen fixing structure is not stable enough under the high-frequency vibration conditions of the high-pressure fan, and the connection is prone to loosening. At the same time, the sealing performance is poor, and unfiltered air can easily enter the fan from the assembly gap, weakening the filtration effect.

[0005] Therefore, the present invention provides a quick-release structure for the inlet filter of a high-pressure blower to prevent foreign objects from being sucked in. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A quick-release structure for a high-pressure blower inlet filter screen to prevent foreign object inhalation, comprising a high-pressure blower body; an air inlet fixedly connected to the side wall of the high-pressure blower body; a filter screen body disposed on one side of the air inlet; a support block fixedly connected to one end of the filter screen body; a cover fixedly connected to the side wall of the support block; symmetrical slots formed on both sides of the support block; symmetrical sliding grooves formed on the inner side wall of the air inlet; a spring rod fixedly connected to the side wall of the sliding groove; a locking block fixedly connected to the end of the spring rod; the locking block and the slot are connected by a snap-fit; connecting ropes are symmetrically fixedly connected to the side wall of the locking block; the connecting ropes pass through the surface of the air inlet and are slidably connected thereto; a pull ring is fixedly connected to the other end of the connecting rope.

[0008] Preferably, a mounting cover is rotatably provided at the top of the air inlet; a filter assembly is provided on one side of the mounting cover; an elastic band is fixedly connected to the other side of the mounting cover; and a fixing hook is fixedly connected to the top of the air inlet.

[0009] Preferably, a first support plate is symmetrically fixed to the side wall of the air inlet; a second support plate is symmetrically fixed to the side wall of the cover; a mounting hole is provided on the side wall of the first support plate; the mounting hole is also provided on the side wall of the second support plate; a rotating rod is provided inside the mounting hole; a fixing nut is provided in the middle of the rotating rod; the fixing nut and the rotating rod are connected by a threaded connection; and a sealing ring is fixed to the side wall of the cover.

[0010] Preferably, the sidewall of the air inlet is provided with a support groove; the sidewall of the support groove is provided with multiple sets of elastic plates.

[0011] Preferably, the side wall of the mounting cover is provided with a mounting groove; the side wall of the filter assembly is fixedly connected with a mounting buckle; the mounting buckle and the mounting groove are connected by a snap-fit.

[0012] Preferably, a first filter layer is provided on the inner side of the filter assembly; a second filter layer is fixedly connected to the bottom end of the first filter layer; and a third filter layer is fixedly connected to the bottom end of the second filter layer.

[0013] Preferably, the surface of the rotating rod is provided with an anti-slip layer; the anti-slip layer is connected to the rotating rod by an adhesive connection.

[0014] Preferably, a rubber ring is fixed to the inner side of the pull ring; the rubber ring wraps around the surface of the pull ring.

[0015] The beneficial effects of this invention are as follows:

[0016] 1. The quick-release structure for preventing foreign object inhalation in the inlet filter of a high-pressure blower, as described in this invention, solves the core defects of the traditional fixing method of high-pressure blower inlet filter, which is cumbersome to install and remove and relies on tools, through the setting of an elastic snap-fit ​​and linkage unlocking structure. It achieves tool-free quick installation and removal, greatly improving maintenance efficiency. Compared with the prior art, its structural optimization for the high-frequency vibration environment of high-pressure blowers has formed outstanding substantial features, effectively avoiding the phenomenon of loose snap-fit ​​or jamming. It not only improves the convenience of maintenance and structural reliability, but also automatically ensures installation accuracy, avoiding abnormal air intake resistance or filter failure caused by installation deviation, and ensuring stable operation of the high-pressure blower.

[0017] 2. The quick-release structure for the inlet filter of a high-pressure blower to prevent foreign object inhalation, as described in this invention, allows the filter assembly to temporarily filter by flipping the mounting cover, effectively preventing foreign objects from entering the blower during this period. This solves the key problem of existing structures where the air inlet is unprotected during filter removal, and foreign objects easily intrude, leading to wear on internal blower parts. Simultaneously, the dual-stage filtration design formed by the filter assembly and the filter body further enhances the comprehensiveness of foreign object interception during daily operation. Combined with the rotatable mounting cover and elastic band-fixed hook positioning structure, it not only improves the convenience and safety of filter assembly maintenance, avoiding the cumbersome disassembly and assembly and the risk of injury from falling off traditional multi-layer integrated filter structures, but also achieves smooth rotation and stable positioning of the mounting cover through the coordinated design of damped hinges and elastic positioning. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a perspective view of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the filter component in this invention;

[0021] Figure 3 yes Figure 1 Enlarged structural diagram at point A in the middle;

[0022] Figure 4 This is a schematic diagram of the anti-slip layer in this invention;

[0023] Figure 5 This is a schematic diagram of the mounting buckle structure in this invention;

[0024] Figure 6 This is a schematic diagram of the structure of the first filter layer in this invention.

[0025] In the diagram: 1. High-pressure blower body; 10. Air inlet; 11. Filter body; 12. Support block; 13. Cover; 14. Slot; 15. Slide groove; 16. Spring rod; 17. Locking block; 18. Connecting rope; 19. Pull ring; 2. Mounting cover; 21. Filter assembly; 22. Elastic band; 23. Fixing hook; 3. First support plate; 31. Second support plate; 32. Mounting hole; 33. Rotating rod; 34. Fixing nut; 35. Sealing ring; 4. Support groove; 41. Elastic sheet; 5. Mounting groove; 51. Mounting buckle; 6. First filter layer; 61. Second filter layer; 62. Third filter layer; 7. Anti-slip layer; 8. Rubber ring. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0027] like Figure 1 - Figure 6As shown in the embodiment of the present invention, a quick-release structure for a high-pressure blower inlet filter to prevent foreign object inhalation includes a high-pressure blower body 1; an air inlet 10 is fixedly connected to the side wall of the high-pressure blower body 1; a filter body 11 is provided on one side of the air inlet 10; a support block 12 is fixedly connected to one end of the filter body 11; a cover 13 is fixedly connected to the side wall of the support block 12; slots 14 are symmetrically formed on both sides of the support block 12; and sliding grooves 15 are symmetrically formed on the inner side wall of the air inlet 10; the sliding grooves 14... A spring rod 16 is fixedly connected to the side wall of the 5th section; a locking block 17 is fixedly connected to the end of the spring rod 16; the locking block 17 is connected to the locking groove 14 by a snap-fit; a connecting rope 18 is symmetrically fixedly connected to the side wall of the locking block 17; the connecting rope 18 passes through the surface of the air inlet 10 and is slidably connected to it; a pull ring 19 is fixedly connected to the other end of the connecting rope 18; during operation, the air inlet 10 can be supported by the high-pressure blower body 1; when the filter screen body 11 needs to be installed, the spring rod fixed in the groove 15... When the filter 16 is in its naturally extended state, its axial elastic force continuously acts on the end-fixed locking block 17, pushing the locking block 17 partially out of the slide groove 15; when the operator holds the cover 13 and inserts the filter body 11, which is fixed to the support block 12, into the air inlet 10, the front edge of the support block 12 first contacts the exposed end of the locking block 17. As the insertion force increases, the support block 12 squeezes the locking block 17, causing the locking block 17 to retract into the slide groove 15 against the elastic force of the spring rod 16; when the filter body 11 is inserted to the preset depth, When the cover 13 is fitted against the end face of the air inlet 10, the slots 14 on both sides of the support block 12 are precisely aligned with the locking block 17. The spring force of the spring rod 16 instantly resets, pushing the locking block 17 into the slot 14. Through the interlocking action of the locking block 17 and the slot 14, the support block 12 and the filter body 11 are axially limited and fixed within the air inlet 10. At this time, the filter body 11 completely covers the internal channel of the air inlet 10. When the high-pressure blower body 1 is working, air must pass through the filter body 11 to enter, and foreign objects are effectively intercepted. During installation, the operator holds the anti-slip textured area of ​​the cover 13 and slowly inserts the filter body 11 into the inlet end of the air inlet 10. During insertion, the operator feels the contact resistance between the support block 12 and the locking block 17. When the resistance suddenly disappears and the cover 13 is fitted against the end face of the air inlet 10, it indicates that the locking block 17 has been embedded in the slot 14, completing the rapid fixing of the filter body 11 without the need for any tools.

[0028] When it is necessary to clean or replace the filter body 11, the operator holds the pull rings 19 on both sides of the air inlet 10 with both hands and applies a pulling force to the outside. The pull rings 19 transmit the pulling force through the connecting rope 18 fixed to them. The connecting rope 18 slides along the rope hole on the surface of the air inlet 10, simultaneously pulling the locking block 17 into the slide groove 15, so that the locking block 17 gradually compresses the spring rod 16 and disengages from the locking groove 14. When the locking block 17 is completely retracted into the slide groove 15, the limiting constraint of the support block 12 is released. The operator continues to hold the cover 13 and pull it outward to completely pull the filter body 11 out of the air inlet 10, thus completing the disassembly. During disassembly, the operator holds the pull rings 19 on both sides with both hands and pulls them outwards evenly, feeling the change in tension of the pull rings 19. When the tension is stable and there is no feeling of jamming, it means that the locking block 17 has completely disengaged from the locking groove 14. At this time, the operator holds the cover 13 and pulls it outwards smoothly to pull the filter body 11 out of the air inlet 10. The entire disassembly and assembly process takes no more than 30 seconds. This design solves the core defects of the traditional fixing method of high-pressure blower inlet filter, which is cumbersome to disassemble and assemble and relies on tools. Through the elastic locking and linkage unlocking structure, tool-free quick disassembly and assembly are achieved, which greatly improves maintenance efficiency. Compared with the existing technology, its structural optimization for the high-frequency vibration environment of high-pressure blowers has formed outstanding substantial features, effectively avoiding the phenomenon of loosening or jamming of the locking. It not only improves the convenience of maintenance and structural reliability, but also automatically ensures the installation accuracy, avoiding abnormal air intake resistance or filter failure caused by installation deviation, and ensuring the stable operation of high-pressure blowers.

[0029] like Figure 1 - Figure 6As shown, a mounting cover 2 is rotatably mounted on the top of the air inlet 10; a filter assembly 21 is mounted on one side of the mounting cover 2; an elastic band 22 is fixedly connected to the other side of the mounting cover 2; and a fixing hook 23 is fixedly connected to the top of the air inlet 10. During operation, when the filter body 11 is pulled out of the air inlet 10 for cleaning or replacement, the operator first removes the elastic band 22 from the fixing hook 23, then flips the mounting cover 2 down. The flipped mounting cover 2 can stably support the filter assembly 21, allowing the filter assembly 21 to temporarily filter the air inlet 10, preventing foreign objects from entering the fan during filter body disassembly. When the filter body 11 needs to be installed, the operator manually pushes the mounting cover 2 outwards, causing it to rotate outwards around the hinge of the rotating connection structure. When the rotation reaches the preset opening angle, the elastic band 22 is released. 2. The free end is hooked onto the fixed hook 23. The elastic tension of the elastic band 22 keeps the mounting cover 2 stably positioned in the open state, preventing it from shaking due to its own weight or residual vibration of the fan. At the same time, it avoids the risk of hand injury caused by accidental closure of the mounting cover 2. The elastic band 22 is made of high-elasticity nitrile rubber, with a width of 15-20mm and a thickness of 2-3mm. One end is fixed to the center of the edge of the mounting cover 2 away from the hinge by a bolt. The natural length of the elastic band 22 is set to 80-100mm, and the stretched length is set to 120-150mm. This ensures that when the mounting cover 2 rotates 90°, the elastic band 22 can stretch naturally and hook onto the fixed hook 23. The tension generated after stretching is 3-5N, which can stably position the mounting cover 2 without deforming the mounting cover 2 due to excessive tension. The fixing hook 23 is an L-shaped stainless steel structure with a height of 30-40mm. It is fixed to the top of the air inlet 10 away from the hinge by welding. The position of the fixing hook 23 corresponds precisely to the fixing position of the elastic band 22, ensuring that the mounting cover 2 remains horizontally open after being hooked. With this design, when the filter body 11 is disassembled, replaced, or cleaned, the filter assembly 21 can be temporarily filtered by flipping the mounting cover 2, effectively preventing foreign objects from entering the fan during this period. This solves the key problem of the existing structure where the air inlet is unprotected and foreign objects can easily enter, causing wear and tear on the internal parts of the fan when the filter is disassembled. At the same time, the dual-level filtration design formed by the filter assembly and the filter body further enhances the comprehensiveness of foreign object interception during daily operation. With the combination of the rotatable mounting cover and the elastic band-fixing hook positioning structure, not only is the convenience and safety of the filter assembly's maintenance improved, avoiding the defects of the traditional multi-layer integrated filter structure, such as cumbersome disassembly and assembly and easy falling and injury, but the coordinated design of the damped hinge and elastic positioning also achieves smooth rotation and stable positioning of the mounting cover.

[0030] like Figure 1 - Figure 6As shown, a first support plate 3 is symmetrically fixed to the side wall of the air inlet 10; a second support plate 31 is symmetrically fixed to the side wall of the cover 13; a mounting hole 32 is provided on the side wall of the first support plate 3; the mounting hole 32 is also provided on the side wall of the second support plate 31; a rotating rod 33 is provided inside the mounting hole 32; a fixing nut 34 is provided in the middle of the rotating rod 33; the fixing nut 34 and the rotating rod 33 are connected by a threaded connection; a sealing ring 35 is fixed to the side wall of the cover 13; during operation, after the filter screen body 11 is initially fixed by the spring rod 16 and the locking block 17, the first support plate 3 and the second support plate 31 are precisely aligned, and the rotating rod 33 passes through... The mounting holes 32 of both plates, when tightened, generate axial pressure through the threaded engagement of the fixing nut 34 and the rotating rod 33, pressing and fixing the first support plate 3 and the second support plate 31. This dual constraint of initial clamping and secondary threaded fixing ensures that the filter body 11 will not loosen or shift under high-frequency vibration and long-term operation of the high-pressure blower, further improving connection stability. When the cover 13 is in contact with the end face of the air inlet 10, the sealing ring 35 fixed to the side wall of the cover 13 is compressed by the end faces of the cover 13 and the air inlet 10, causing elastic deformation and filling the tiny gap between the cover 13 and the air inlet 10. Simultaneously, the clamping force of the secondary fixing mechanism ensures that the compression of the sealing ring 35 is maintained. To maintain stability and ensure reliable sealing performance, unfiltered air is prevented from entering the high-pressure blower body 1 through gaps, ensuring undiminished filtration effect. The sealing ring 35 is made of aging-resistant and wear-resistant nitrile rubber, with a circular or rectangular cross-section. The diameter of the circular cross-section is set to 5-8mm, and the size of the rectangular cross-section is set to 5mm×8mm. The sealing ring 35 is fixed to the side wall of the cover 13 facing the air inlet 10 by adhesive or slot fixing, and is distributed in a ring. The diameter of the ring is consistent with the outer diameter of the air inlet 10. This ensures that when the cover 13 is in contact with the end face of the air inlet 10, the sealing ring 35 is uniformly compressed, with the compression controlled at 30-50%, which ensures the sealing effect while avoiding excessive compression that could damage the sealing ring. The 35° permanent deformation design, through a dual fixing mechanism combining snap-fit ​​and threaded connections, solves the problem of loosening and falling off existing single-snap structures under the harsh vibration conditions of high-pressure blowers, significantly improving the connection stability of the filter body and adapting to the high-intensity working environment of high-pressure blowers. The synergistic design of the sealing ring and the secondary fixing mechanism ensures sealing performance, avoiding the problem of unfiltered air leakage caused by gaps in existing structures, and ensuring that the filtration effect is not compromised. Compared with existing technologies, this design achieves a synergistic effect of quick assembly and disassembly and stable reliability, solving the technical problem of the difficulty in balancing these two aspects. At the same time, it also extends the service life of the sealing performance, improves the load-bearing capacity of the filter body, and expands the application range of high-pressure blowers.

[0031] like Figure 1 - Figure 6As shown, the side wall of the air inlet 10 is provided with a support groove 4; the side wall of the support groove 4 is provided with multiple sets of elastic plates 41; during operation, when the operator inserts the filter body 11 into the air inlet 10, the side wall of the filter body 11 contacts the multiple sets of elastic plates 41 in the support groove 4. The elastic plates 41 undergo elastic deformation due to contact and compression, generating a radial guiding force on the filter body 11; under the action of the guiding force, the filter body 11 is accurately inserted along the axial direction of the air inlet 10, avoiding deviation or jamming during the insertion process, ensuring that the slot 14 of the support block 12 and the block 17 are accurately aligned, improving the convenience and accuracy of installation. After the filter body 11 is installed, the multiple sets of elastic plates 41 continuously support the filter. The sidewall of the filter body 11 generates a uniform elastic support force, radially positioning the filter body 11 at the center of the air inlet 10. When the high-pressure blower is working, the filter body 11 will not vibrate radially due to high-frequency vibration, avoiding friction and wear between the filter body 11 and the inner sidewall of the air inlet 10. At the same time, it prevents the snap-fit ​​structure from loosening or the sealing structure from failing due to radial vibration. The elastic sheet 41 is made of thin stainless steel with good elasticity, with a thickness of 0.5-1mm, a width of 8-12mm, and a length of 15-20mm. One end of the elastic sheet 41 is fixed to the sidewall of the support groove 4 by welding, and the other end is inclined towards the center of the support groove 4 at an angle of 15-20°. The number of elastic plates 41 is set to 6-8 sets, evenly distributed on the annular sidewall of the support groove 4, ensuring uniform distribution of the supporting force on the filter body 11. Through the support groove and elastic plate guide support structure, the problems of no guidance and easy deviation and jamming during the insertion process of the existing filter are solved, improving the installation accuracy and convenience. At the same time, the uniform elastic support avoids direct friction between the filter body and the inner sidewall of the air inlet, reducing wear and extending the service life of the filter. Compared with the existing rigid guide structure, the elastic integrated structure of this design not only achieves precise guidance, but also absorbs vibration energy and plays a buffering role, reducing the vibration amplitude of the filter body, avoiding deformation caused by local stress concentration, ensuring the integrity of the filtration area, and realizing the synergistic effect of guidance and buffering.

[0032] like Figure 1 - Figure 6As shown, the side wall of the mounting cover 2 has a mounting groove 5; the side wall of the filter assembly 21 is fixedly connected with a mounting buckle 51; the mounting buckle 51 and the mounting groove 5 are connected by a snap-fit; during operation, when installing the filter assembly 21, align the mounting buckle 51 on the side wall of the filter assembly 21 with the mounting groove 5 on the side wall of the mounting cover 2, and apply axial pressure to make the mounting buckle 51 embed into the mounting groove 5; the mounting buckle 51 is made of elastic material, and after embedding, it undergoes elastic deformation. The snap-fit ​​fixation is achieved through the interlocking of the mounting buckle 51 and the mounting groove 5, ensuring that the filter assembly 21 is stably fixed on the mounting cover 2 and will not fall off due to fan vibration. When it is necessary to replace or deeply clean the filter assembly 21, the operator pinches the edge of the filter assembly 21 with his hand and applies a pulling force away from the mounting cover 2; under the action of the pulling force, the mounting buckle 51 overcomes its own elastic deformation and disengages from the mounting groove 5, thus releasing the filter assembly 21. After removing the snap-fit ​​constraint, the filter assembly 21 can be removed from the mounting cover 2 without disassembling the entire mounting cover 2, making the operation convenient. Through the snap-fit ​​structure of the mounting groove and mounting buckle, the filter assembly and mounting cover can be quickly and easily disassembled and assembled separately. This solves the defects of existing filter assemblies and mounting covers that are integrally molded or bolted together, resulting in cumbersome disassembly and assembly and high maintenance costs. It not only shortens the maintenance operation time but also reduces maintenance costs. Multiple evenly distributed snap-fit ​​structures ensure connection stability, adapt to the fan vibration environment, and avoid the problem of easy loosening and falling off of existing single snap-fit ​​structures. Compared with existing technologies, the positioning boss and guide chamfer collaborative structure of this design improves installation accuracy, avoids filter gaps, and achieves a balance between quick disassembly and assembly and stable fixation. The individual disassembly and assembly design also allows for more thorough cleaning of the filter assembly, avoids component contamination, and further ensures the filtration effect.

[0033] like Figure 1 - Figure 6As shown, a first filter layer 6 is provided on the inner side of the filter assembly 21; a second filter layer 61 is fixedly connected to the bottom end of the first filter layer 6; a third filter layer 62 is fixedly connected to the bottom end of the second filter layer 61; during operation, when the high-pressure blower is working, air passes through the third filter layer 62, the second filter layer 61, and the first filter layer 6 in sequence from the air inlet side to the air outlet side. The mesh size of the three filter layers decreases sequentially, achieving graded filtration: the third filter layer 62 first intercepts larger-sized foreign objects such as particles and debris with a particle size ≥2mm, to prevent larger foreign objects from impacting and damaging the subsequent fine filter layers; the second filter layer 61 intercepts medium-sized foreign objects such as dust particles. The first filter layer 6 intercepts fine particles such as fine dust and fibers with a particle size ≤0.5mm. Through three-layer synergistic filtration, comprehensive interception of foreign objects of different particle sizes is achieved, improving filtration efficiency and effect. The first filter layer 6 uses ultra-fine stainless steel mesh or PTFE membrane filter material with a mesh size of 0.1-0.5mm to intercept fine foreign objects. The second filter layer 61 uses conventional stainless steel mesh with a mesh size of 0.5-2mm to intercept medium-sized foreign objects. The third filter layer 62 uses coarse-pore stainless steel mesh with a mesh size of 2-5mm to intercept larger foreign objects. The external dimensions of the three filter layers are consistent with the frame dimensions of the filter assembly 21, and the thickness of each layer is set to 1-2mm. The three filter layers are sequentially fixed together by welding or bonding. The first filter layer 6 is fixed to the outlet side of the second filter layer 61, and the second filter layer 61 is fixed to the outlet side of the third filter layer 62. The layers are tightly fitted without gaps. This three-layer graded filtration structure achieves precise and comprehensive interception of foreign objects of different particle sizes, solving the problem of limited interception capability of existing single-layer or double-layer filtration structures for small foreign objects. This reduces wear on internal parts of the fan from the source and extends the service life of the fan. The coarse-pore filter layer intercepts larger foreign objects first, avoiding impact damage to the fine filter layer and extending the overall service life of the filter assembly. Compared with the existing simple stacked multi-layer filtration structure, this design achieves a synergistic effect of high-efficiency filtration, low intake resistance, and long clogging cycle through precise matching of mesh pore size and optimization of airflow direction. The design that each filter layer can be replaced individually further reduces maintenance costs and improves economy.

[0034] like Figure 1 - Figure 6As shown, the surface of the rotating rod 33 is provided with an anti-slip layer 7; the anti-slip layer 7 is connected to the rotating rod 33 by adhesive bonding; during operation, when the operator twists the rotating rod 33, their hand comes into contact with the anti-slip layer 7. The rough surface of the anti-slip layer 7 increases the friction between the hand and the rotating rod 33, allowing for stable grip and torque application even with oily or sweaty hands, preventing hand injury or operational failure due to slippage; when the high-pressure blower is working, the elastic material of the anti-slip layer 7 absorbs some of the vibration energy, reducing the impact of vibration on the threaded connection of the rotating rod 33 and preventing the threads from loosening. The anti-slip layer 7 is made of wear-resistant, oil-resistant, and highly elastic rubber or silicone material, with a thickness of 1-2 mm. The surface is provided with evenly distributed anti-slip patterns such as diamond patterns or stripes, and the depth of the anti-slip patterns is set to 0.3-0.5 mm to further enhance friction. The anti-slip layer 7 is fixed to the surface of the rotating rod 33 by adhesive bonding. High-strength epoxy adhesive is used to ensure that the anti-slip layer 7 adheres tightly to the rotating rod 33 without bubbles or peeling. After bonding, it is cured at room temperature for more than 24 hours to ensure the bonding strength. The coverage area of ​​the anti-slip layer 7 is the middle gripping area of ​​the rotating rod 33, and the length is set to 30-40mm to ensure that the operator's hand can fully contact the anti-slip layer 7 when twisting. By adding an anti-slip layer to the surface of the rotating rod, the problem of slippage when turning existing smooth metal rotating rods is solved, improving the ease of operation and safety. Stable operation is possible even when hands are oily, sweaty, or when wearing gloves, and initial disassembly and assembly can be completed without the aid of tools. At the same time, the elastic material of the anti-slip layer has a vibration buffering effect, reducing the impact of high-pressure fan vibration on the rotating rod threaded connection, preventing the threads from loosening, and enhancing the connection stability of the secondary fixing mechanism. Compared with existing anti-slip structures applied to other components, this design is optimized for the usage scenario of the rotating rod, achieving a synergistic effect of anti-slip, buffering, and convenient operation, improving the overall operational reliability and service life of the structure.

[0035] like Figure 1 - Figure 6As shown, a rubber ring 8 is fixed to the inner side of the pull ring 19; the rubber ring 8 wraps around the surface of the pull ring 19; during operation, when the operator pulls the pull ring 19, the hand directly contacts the rubber ring 8 covering the surface of the pull ring 19. The rough surface of the rubber ring 8 increases the friction between the hand and the pull ring 19, so that even if the hand is oily, sweaty, or wearing gloves, the operator can still hold the ring stably and apply pulling force, avoiding slippage and operational failure; the elastic material of the rubber ring 8 can conform to the contour of the hand, dispersing the pressure of the pulling force on the local skin of the hand, reducing hand fatigue during long-term or frequent operation; at the same time, the rubber ring 8 isolates the metal pull ring 19 from the hand, preventing the metal edge from scratching the hand and improving operational safety. The rubber ring 8 is made of aging-resistant and elastic nitrile rubber or silicone material, with a thickness of 2-3mm. The inner diameter is precisely matched with the inner diameter of the pull ring 19 with a gap controlled at 0.1-0.2mm, ensuring that the rubber ring 8 can tightly fit the inner wall of the pull ring 19. The width of the rubber ring 8 is the same as that of the pull ring 19, which is 30-50mm. This ensures that it can completely cover the inner and outer surfaces of the pull ring 19, with no exposed areas. This design can play a protective role, thereby preventing the metal edge from directly contacting the hand, reducing the risk of scratches to zero, and greatly improving operational safety.

[0036] Working principle: The high-pressure blower body 1 supports the air inlet 10. When the filter body 11 needs to be installed, the spring rod 16 fixed in the slide groove 15 is in a naturally extended state. Its axial elastic force continuously acts on the end-fixed locking block 17, pushing the locking block 17 out of the slide groove 15. When the operator holds the cover 13 and inserts the filter body 11 fixed to the support block 12 into the air inlet 10, the front edge of the support block 12 first contacts the exposed end of the locking block 17. As the insertion force increases, the support block 12 squeezes the locking block 17, causing the locking block 17 to overcome the elastic force of the spring rod 16 and move towards the air inlet 10. The slide 15 retracts internally; when the filter body 11 is inserted to the preset depth and the cover 13 fits against the end face of the air inlet 10, the slots 14 on both sides of the support block 12 are precisely aligned with the locking block 17, and the spring force of the spring rod 16 is instantly reset, pushing the locking block 17 into the slot 14. Through the convex and concave cooperation between the locking block 17 and the slot 14, the axial limiting and fixing of the support block 12 and the filter body 11 in the air inlet 10 is achieved. At this time, the filter body 11 completely covers the internal channel of the air inlet 10. When the high-pressure blower body 1 is working, air must pass through the filter body 11 to enter, and foreign objects are effectively intercepted. During installation, the operator holds the cover 13 by its anti-slip textured area and slowly inserts the filter body 11 into the air inlet 10, aligning it with the inlet end. During insertion, the operator feels the contact resistance between the support block 12 and the locking block 17. When the resistance suddenly disappears and the cover 13 fits snugly against the end face of the air inlet 10, it indicates that the locking block 17 has been embedded in the slot 14, completing the rapid fixation of the filter body 11 without the need for any tools.

[0037] When it is necessary to clean or replace the filter body 11, the operator holds the pull rings 19 on both sides of the air inlet 10 with both hands and applies a pulling force to the outside. The pull rings 19 transmit the pulling force through the connecting rope 18 fixed to them. The connecting rope 18 slides along the rope hole on the surface of the air inlet 10, simultaneously pulling the locking block 17 into the slide groove 15, so that the locking block 17 gradually compresses the spring rod 16 and disengages from the locking groove 14. When the locking block 17 is completely retracted into the slide groove 15, the limiting constraint of the support block 12 is released. The operator continues to hold the cover 13 and pull it outward to completely pull the filter body 11 out of the air inlet 10, thus completing the disassembly. During disassembly, the operator holds the pull rings 19 on both sides with both hands and pulls them outwards evenly, feeling the change in pulling force. When the pulling force is stable and there is no jamming, it means that the locking block 17 has completely disengaged from the locking groove 14. At this time, the operator holds the cover 13 and pulls it outwards smoothly to remove the filter body 11 from the air inlet 10. The entire disassembly and assembly process takes no more than 30 seconds.

[0038] When the filter body 11 is pulled out of the air inlet 10 for cleaning or replacement, the operator first removes the elastic band 22 from the fixing hook 23, and then flips down the mounting cover 2. The flipped mounting cover 2 can stably support the filter assembly 21. At this time, the filter assembly 21 can temporarily filter the air inlet 10 to prevent foreign objects from entering the fan during the removal of the filter body. When it is necessary to install the filter body 11, the operator manually pushes the mounting cover 2 outward to rotate it outward around the hinge of the rotating connection structure. When it is rotated to the preset opening angle, the free end of the elastic band 22 is hooked onto the fixing hook 23. The elastic tension of the elastic band 22 keeps the mounting cover 2 stably positioned in the open state, preventing it from shaking due to its own weight or residual vibration of the fan, and also avoiding the risk of personnel's hands being pinched due to accidental closing of the mounting cover 2.

[0039] After the filter body 11 is initially fixed by the spring rod 16 and the snap-fit ​​structure of the clip 17, the first support plate 3 and the second support plate 31 are precisely aligned. The rotating rod 33 passes through the mounting holes 32 of both. By tightening the fixing nut 34, the threaded engagement between the fixing nut 34 and the rotating rod 33 generates axial pressure, pressing the first support plate 3 and the second support plate 31 tightly and fixed. Through the dual constraints of the initial fixing by snap-fit ​​and the secondary fixing by the thread, it is ensured that the filter body 11 will not loosen or shift under the high-frequency vibration and long-term working conditions of the high-pressure blower, and the connection stability is further improved. When the cover 13 is in contact with the end face of the air inlet 10, the sealing ring 35 fixed to the side wall of the cover 13 is squeezed by the end face of the cover 13 and the air inlet 10 to generate elastic deformation, filling the tiny gap between the cover 13 and the air inlet 10. Meanwhile, the clamping force of the secondary fixing mechanism keeps the compression of the sealing ring 35 stable, ensuring continuous and reliable sealing performance and preventing unfiltered air from entering the high-pressure blower body 1 through the gap, thus ensuring that the filtration effect is not compromised. The sealing ring 35 is made of aging-resistant and wear-resistant nitrile rubber, with a circular or rectangular cross-section. The diameter of the circular cross-section is set to 5-8mm, and the size of the rectangular cross-section is set to 5mm×8mm. The sealing ring 35 is fixed to the side wall of the cover 13 facing the air inlet 10 by adhesive or slot fixing, and is distributed in a ring. The diameter of the ring is consistent with the outer diameter of the air inlet 10, ensuring that when the cover 13 is in contact with the end face of the air inlet 10, the sealing ring 35 is uniformly squeezed, and the compression is controlled at 30-50%, which ensures the sealing effect while avoiding excessive compression that could cause permanent deformation of the sealing ring 35.

[0040] When the operator inserts the filter body 11 into the air inlet 10, the side wall of the filter body 11 contacts the multiple sets of elastic plates 41 in the support groove 4. The elastic plates 41 undergo elastic deformation due to contact and compression, generating a radial guiding force on the filter body 11. Under the action of this guiding force, the filter body 11 is precisely inserted along the axial direction of the air inlet 10, avoiding deviation or jamming during insertion. This ensures precise alignment of the slot 14 and the block 17 of the support block 12, improving installation convenience and accuracy. After the filter body 11 is installed, the multiple sets of elastic plates 41 continuously generate a uniform elastic support force on the side wall of the filter body 11, ensuring the filter body... The filter body 11 is radially positioned at the center of the air inlet 10. When the high-pressure blower is operating, the filter body 11 will not experience radial swaying due to high-frequency vibration, preventing friction and wear between the filter body 11 and the inner wall of the air inlet 10. This also prevents loosening of the locking structure or failure of the sealing structure due to radial swaying. The elastic sheet 41 is made of thin, highly elastic stainless steel with a thickness of 0.5-1mm, a width of 8-12mm, and a length of 15-20mm. One end of the elastic sheet 41 is fixed to the side wall of the support groove 4 by welding, and the other end is inclined towards the center of the support groove 4 at an angle of 15-20°. Six to eight sets of elastic sheets 41 are evenly distributed on the annular side wall of the support groove 4 to ensure uniform distribution of the supporting force on the filter body 11.

[0041] When installing the filter assembly 21, align the mounting buckle 51 on the side wall of the filter assembly 21 with the mounting groove 5 on the side wall of the mounting cover 2, and apply axial pressure to make the mounting buckle 51 embed into the mounting groove 5. The mounting buckle 51 is made of elastic material, and after embedding, it undergoes elastic deformation. The buckle 51 and the mounting groove 5 engage to achieve a snap-fit ​​fixation, ensuring that the filter assembly 21 is stably fixed on the mounting cover 2 and will not fall off due to fan vibration. When it is necessary to replace the filter assembly 21 individually or perform deep cleaning, the operator pinches the edge of the filter assembly 21 and applies a pulling force away from the mounting cover 2. Under the action of the pulling force, the mounting buckle 51 overcomes its own elastic deformation and disengages from the mounting groove 5, releasing the snap-fit ​​constraint. The filter assembly 21 can then be removed from the mounting cover 2 without disassembling the entire mounting cover 2, making the operation convenient.

[0042] When the high-pressure blower is working, air passes sequentially through the third filter layer 62, the second filter layer 61, and the first filter layer 6 from the inlet side to the outlet side. The mesh size of the three filter layers decreases sequentially, achieving graded filtration: the third filter layer 62 first intercepts larger particles such as granules and debris with a particle size ≥2mm, preventing larger particles from impacting and damaging subsequent fine filter layers; the second filter layer 61 intercepts medium-sized particles such as dust particles with a particle size of 0.5-2mm; and the first filter layer 6 intercepts fine particles such as fine dust and fibers with a particle size ≤0. The filter layer 6 has a diameter of 0.5mm. Through three layers of synergistic filtration, it achieves comprehensive interception of foreign objects of different particle sizes, improving filtration efficiency and effectiveness. The first filter layer 6 uses ultra-fine stainless steel mesh or PTFE membrane filter material with a mesh size of 0.1-0.5mm to intercept fine foreign objects. The second filter layer 61 uses conventional stainless steel mesh with a mesh size of 0.5-2mm to intercept medium-sized foreign objects. The third filter layer 62 uses coarse-pore stainless steel mesh with a mesh size of 2-5mm to intercept larger foreign objects. The external dimensions of the three filter layers are consistent with the frame dimensions of the filter assembly 21, and the thickness of each layer is set to 1-2mm. The three filter layers are sequentially fixed by welding or bonding. The first filter layer 6 is fixed to the outlet side of the second filter layer 61, and the second filter layer 61 is fixed to the outlet side of the third filter layer 62. The layers are tightly bonded together without gaps.

[0043] When the operator rotates the lever 33, their hand comes into contact with the anti-slip layer 7. The rough surface of the anti-slip layer 7 increases the friction between the hand and the lever 33, allowing for a stable grip and application of torque even with oily or sweaty hands, preventing hand injuries or operational failures due to slippage. When the high-pressure blower is operating, the elastic material of the anti-slip layer 7 absorbs some of the vibration energy, reducing the impact of vibration on the threaded connection of the lever 33 and preventing loosening of the threads. The anti-slip layer 7 is made of wear-resistant, oil-resistant, and highly elastic rubber or silicone material, with a thickness of 1-2 mm. Its surface features evenly distributed anti-slip textures such as diamond patterns or stripes, with a depth of 0.3-0.5 mm, further enhancing friction. The anti-slip layer 7 is fixed to the surface of the lever 33 using an adhesive connection. High-strength epoxy adhesive is used to ensure a tight bond between the anti-slip layer 7 and the lever 33, without bubbles or detachment. After bonding, it is cured at room temperature for at least 24 hours to ensure bonding strength. The anti-slip layer 7 covers the middle gripping area of ​​the rotating rod 33, and its length is set to 30-40mm to ensure that the operator's hand can fully contact the anti-slip layer 7 when twisting.

[0044] When the operator pulls the pull ring 19, their hand comes into direct contact with the rubber ring 8 covering the surface of the pull ring 19. The rough surface of the rubber ring 8 increases the friction between the hand and the pull ring 19, allowing for a stable grip and application of pulling force even with oily, sweaty, or gloved hands, preventing slippage and operational failure. The elastic material of the rubber ring 8 conforms to the contours of the hand, distributing the pressure of the pulling force on the local skin and reducing hand fatigue during prolonged or frequent operation. Simultaneously, the rubber ring 8 isolates the metal pull ring 19 from the hand, preventing scratches from the metal edges and improving operational safety. The rubber ring 8 is made of aging-resistant, highly elastic nitrile rubber or silicone, with a thickness of 2-3 mm. Its inner diameter precisely matches the inner diameter of the pull ring 19, with a gap controlled at 0.1-0.2 mm, ensuring a tight fit between the rubber ring 8 and the inner wall of the pull ring 19. The width of the rubber ring 8 is the same as the width of the pull ring 19, 30-50 mm, ensuring complete coverage of the inner and outer surfaces of the pull ring 19 with no exposed areas.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quick-release structure for the inlet filter of a high-pressure blower to prevent foreign object inhalation, comprising a high-pressure blower body (1); characterized in that: An air inlet (10) is fixedly connected to the side wall of the high-pressure blower body (1); a filter body (11) is provided on one side of the air inlet (10); a support block (12) is fixedly connected to one end of the filter body (11); a cover (13) is fixedly connected to the side wall of the support block (12); slots (14) are symmetrically opened on both sides of the support block (12); sliding grooves (15) are symmetrically opened on the inner side wall of the air inlet (10); a spring rod (16) is fixedly connected to the side wall of the sliding groove (15); a locking block (17) is fixedly connected to the end of the spring rod (16); the locking block (17) and the slot (14) are connected by a locking mechanism; a connecting rope (18) is symmetrically fixedly connected to the side wall of the locking block (17); the connecting rope (18) passes through the surface of the air inlet (10) and is slidably connected to it; a pull ring (19) is fixedly connected to the other end of the connecting rope (18).

2. The quick-release structure for preventing foreign object inhalation in a high-pressure blower inlet filter according to claim 1, characterized in that: The top of the air inlet (10) is rotatably provided with a mounting cover (2); a filter assembly (21) is provided on one side of the mounting cover (2); an elastic band (22) is fixedly connected to the other side of the mounting cover (2); and a fixing hook (23) is fixedly connected to the top of the air inlet (10).

3. The quick-release structure for preventing foreign object inhalation in a high-pressure blower inlet filter according to claim 1, characterized in that: The sidewall of the air inlet (10) is symmetrically fixed with a first support plate (3); the sidewall of the cover (13) is symmetrically fixed with a second support plate (31); the sidewall of the first support plate (3) is provided with an installation hole (32); the installation hole (32) is also provided on the sidewall of the second support plate (31); a rotating rod (33) is provided inside the installation hole (32); a fixing nut (34) is provided in the middle of the rotating rod (33); the fixing nut (34) and the rotating rod (33) are connected by a threaded connection; a sealing ring (35) is fixed to the sidewall of the cover (13).

4. The quick-release structure for preventing foreign object inhalation in a high-pressure blower inlet filter according to claim 1, characterized in that: The side wall of the air inlet (10) is provided with a support groove (4); the side wall of the support groove (4) is provided with multiple sets of elastic plates (41).

5. The quick-release structure for preventing foreign object inhalation in a high-pressure blower inlet filter according to claim 2, characterized in that: The mounting cover (2) has a mounting groove (5) on its side wall; the filter assembly (21) has a mounting buckle (51) fixed to its side wall; the mounting buckle (51) and the mounting groove (5) are connected by a snap-fit.

6. The quick-release structure for preventing foreign object inhalation in a high-pressure blower inlet filter according to claim 2, characterized in that: The filter assembly (21) has a first filter layer (6) on its inner side; a second filter layer (61) is fixedly connected to the bottom end of the first filter layer (6); and a third filter layer (62) is fixedly connected to the bottom end of the second filter layer (61).

7. The quick-release structure for preventing foreign object inhalation in a high-pressure blower inlet filter according to claim 3, characterized in that: The surface of the rotating rod (33) is provided with an anti-slip layer (7); the anti-slip layer (7) and the rotating rod (33) are connected by adhesive bonding.

8. The quick-release structure for preventing foreign object inhalation in a high-pressure blower inlet filter according to claim 1, characterized in that: A rubber ring (8) is fixed to the inner side of the pull ring (19); the rubber ring (8) is wrapped around the surface of the pull ring (19).

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