A quick release filter bag frame assembly for a pulse-jet dust collector apparatus

Abstract

The utility model provides a kind of quick-release filter bag frame assembly of pulse dust collector device belongs to pulse dust collector device technical field, the quick-release filter bag frame assembly of this pulse dust collector device includes frame body and locking mechanism, the frame body includes upper end ring and lower end ring, the upper end ring is connected between lower end ring by several support bars, the support bar is equidistributed and is arranged along the circumferential direction of upper end ring, the upper end of support bar is fixedly connected with upper end ring, the lower end of support bar is fixedly connected with lower end ring, the locking mechanism is arranged on upper end ring, the locking mechanism includes fixed base and buckle, the fixed base is fixedly connected on the outer circumferential surface of upper end ring;It can solve the technical problem that filter bag frame assembly of pulse dust collector in prior art is replaced filter bag operation cumbersome time-consuming, and frequent disassembly and assembly can easily lead to thread wear even damage, seriously affect the maintenance efficiency and downtime of dust removal system.

Description

Technical Field

[0001] This utility model belongs to the technical field of pulse dust collector devices, and more specifically, it relates to a quick-release filter bag frame assembly for a pulse dust collector device. Background Technology

[0002] Pulse jet dust collectors are widely used in industries that generate large amounts of dust, such as steel smelting, cement production, coal processing, and chemical manufacturing, and are important environmental protection equipment. The core component of the dust collector is a filtration system composed of hundreds or even thousands of filter bags. When dust-laden gas passes through the outer surface of the filter bags, the dust is trapped, and the purified gas is discharged from the inside of the filter bags. The dust accumulated on the surface of the filter bags is cleaned by periodic pulse jet cleaning. Each filter bag needs to be fitted onto a metal frame to maintain its shape and tension. This frame is fixed to the tube sheet of the dust collector via a connecting structure at the top. Because filter bags will be damaged by dust wear, high-temperature aging, or chemical corrosion during long-term use, they need to be replaced periodically, ranging from several months to a year. When replacing filter bags, the frame must first be removed from the tube sheet. The mainstream frame fixing method in existing technology is to use a threaded joint at the top of the frame, tightening the nut to press the frame into the tube sheet hole, or to use bolts passing through the flange at the top of the frame to connect it to the tube sheet. While this threaded connection method provides a secure connection, it has significant drawbacks: First, it is cumbersome to operate. Disassembling or assembling a single frame typically requires turning the nut or bolt dozens of times. Using a wrench in the confined and dimly lit space inside the dust collector is extremely inconvenient, limiting a maintenance worker to replacing only a few dozen filter bags per day. Second, threaded connections are prone to wear under frequent disassembly and vibration. Dull threads can lead to loosening or difficulty in tightening, and even stripping, causing connection failure and requiring replacement, increasing maintenance costs. Furthermore, threaded connections require specialized tools such as wrenches, demanding a higher level of skill from maintenance personnel. These problems result in low maintenance efficiency, long downtime, and disruption of production continuity, necessitating the development of a new frame fixing structure that is easy to operate, quick to assemble and disassemble, and provides a reliable connection. Utility Model Content

[0003] In view of this, the present invention provides a quick-release filter bag frame assembly for a pulse dust collector, which solves the problem that in the prior art, the filter bag frame assembly of pulse dust collectors is generally fixed to the tube sheet by a threaded tightening method. When changing filter bags, operators need to use wrenches and other tools to repeatedly rotate the threaded connectors multiple times to complete the disassembly or installation of the frame. In the narrow and poorly lit maintenance environment inside the dust collector, this threaded connection method is cumbersome and time-consuming, and frequent disassembly and assembly can easily lead to thread wear or even damage. When the dust collector has hundreds or even thousands of filter bags, the overall maintenance workload is huge, which seriously affects the maintenance efficiency and downtime of the dust collection system.

[0004] This utility model is implemented as follows:

[0005] This utility model provides a quick-release filter bag frame assembly for a pulse dust collector, comprising a frame body and a locking mechanism. The frame body includes an upper ring and a lower ring, which are connected by several support rods. The support rods are evenly distributed along the circumference of the upper ring, with the upper end of each support rod fixedly connected to the upper ring and the lower end of each support rod fixedly connected to the lower ring. The locking mechanism is mounted on the upper ring and includes a fixed base and a latching member. The fixed base is fixedly connected to the outer circumferential surface of the upper ring, and the latching member is hinged to the fixed base via a rotating shaft. The latching member has an engaging portion and an operating portion. The engaging portion is located on one side of the rotating shaft, and the operating portion is located on the other side of the rotating shaft. The free end of the engaging portion extends away from the upper ring, and a limiting protrusion is provided on the inner surface of the engaging portion. When the latching member is in the locked state, the limiting protrusion contacts the outer circumferential surface of the upper ring.

[0006] The technical advantages of the quick-release filter bag frame assembly of the pulse dust collector provided by this utility model are as follows: By setting a locking mechanism consisting of a fixed seat and a buckle on the outer circumference of the upper ring, and hinged to the fixed seat through a rotating shaft, the buckle can rotate around the rotating shaft to switch between the locked and unlocked states. When the buckle is in the locked state, the limiting protrusion on the inner side of the engaging part contacts the outer circumference of the upper ring to generate a pressing force, thereby achieving quick fixation of the frame assembly to the dust collector tube sheet. The operator only needs to rotate the operating part to complete the locking or unlocking action, avoiding the cumbersome operation of multiple rotations required by the traditional threaded connection method, significantly improving the installation and disassembly efficiency of the filter bag frame, and is particularly suitable for dust collector maintenance scenarios that require frequent filter bag replacement.

[0007] Based on the above technical solution, the quick-release filter bag frame assembly of the pulse dust collector device of this utility model can be further improved as follows:

[0008] Wherein, the length of the limiting protrusion along the tangent of the upper circumference is greater than the length of the engaging portion along the tangent of the upper circumference.

[0009] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by making the length of the limiting protrusion along the tangent direction of the upper ring circumference greater than the length of the engaging part along the same direction, the limiting protrusion forms a local reinforcement structure in the middle position of the engaging part. When the fastener is locked, the wider limiting protrusion can disperse the pressure in a larger contact area, avoiding stress concentration caused by too small a contact area, preventing local deformation or damage to the outer circumference of the upper ring, and at the same time, the increased contact length increases the friction force, making the locking connection more secure and reliable, and effectively preventing the frame assembly from loosening or falling off when the dust collector pulse jet vibrates.

[0010] Furthermore, a receiving gap is formed between the bottom of the fixing seat and the outer circumferential surface of the upper ring. The height of the receiving gap is greater than the thickness of the engaging part, and the engaging part is located within the receiving gap when in the unlocked state.

[0011] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: By forming a receiving gap with a height greater than the thickness of the engaging part between the bottom of the fixed seat and the outer circumferential surface of the upper ring, sufficient storage space is provided for the engaging part of the buckle in the unlocked state. When the operator lifts the operating part upward and rotates the engaging part downward around the axis, the engaging part can be completely inserted into the receiving gap without interfering with the outer circumferential surface of the upper ring. This allows the limiting protrusion of the engaging part to completely disengage from the upper ring, achieving complete unlocking. At this time, the frame assembly can be smoothly pulled out from the hole in the tube sheet, avoiding jamming caused by residual contact of the engaging part, and further improving the convenience and smoothness of the disassembly operation.

[0012] Furthermore, the limiting protrusion has an arc-shaped boss structure, and the arc-shaped surface of the limiting protrusion matches the curvature of the outer circumferential surface of the upper ring.

[0013] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by designing the limiting protrusion as an arc-shaped boss structure and matching the curvature of its arc surface with the outer circumference of the upper ring, the limiting protrusion and the upper ring form a surface contact rather than a point contact or line contact, which significantly increases the contact area and effectively reduces the contact stress per unit area, avoiding indentations or scratches on the surface of the upper ring in the locked state. At the same time, the fitting design of the arc surface makes the pressure distribution more uniform, eliminates stress concentration points, extends the service life of the upper ring and the limiting protrusion, and the good fit between the arc surfaces improves the locking stability and prevents relative slippage in a vibration environment.

[0014] Furthermore, the free end of the engaging portion is provided with a guide slope, and the guide slope forms an acute angle with the extending direction of the engaging portion.

[0015] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: By setting a guide slope at the free end of the engaging part that forms an acute angle with the extending direction of the engaging part, when the frame assembly is inserted into the hole of the tube sheet, the guide slope can first contact the edge of the tube sheet and generate a guiding effect, guiding the engaging part to slide smoothly into the predetermined position without being blocked due to positioning deviation. The acute angle design of the guide slope reduces the contact resistance at the initial stage of insertion, allowing the operator to complete the installation and positioning of the frame assembly with a smaller thrust, reducing the difficulty of operation. Especially in cases where there is insufficient light or narrow space inside the dust collector, the automatic guiding function of the guide slope can significantly improve the accuracy and efficiency of the installation operation.

[0016] Furthermore, the operating part has an arc-shaped plate structure, and the outer surface of the operating part is provided with anti-slip texture, which is a number of radially distributed grooves.

[0017] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by designing the operating part as an arc-shaped plate structure and setting several radially distributed grooves on its outer surface to form an anti-slip texture, the friction coefficient between the operating part and the operator's fingers or tools is significantly increased. Even when the operator's hands are dusty or oily, reliable grip can be ensured, preventing slippage when applying rotational torque. The arc-shaped plate structure adapts to the curvature of the fingers, improving grip comfort. The radially distributed groove texture can always provide effective anti-slip effect during the rotation of the operating part, enabling the operator to accurately control the rotation angle of the buckle and ensure the precise completion of locking or unlocking actions.

[0018] Furthermore, the fixed base is provided with a limiting groove, the limiting groove penetrates the fixed base, and both ends of the rotating shaft are respectively inserted into the limiting groove, the groove wall of the limiting groove and the outer circumferential surface of the rotating shaft form a clearance fit.

[0019] The beneficial effects of adopting the above-mentioned improved scheme are as follows: by setting a through-hole limiting groove on the fixed seat and having both ends of the rotating shaft pass through the limiting groove, the rotating shaft obtains reliable radial support and axial positioning. The groove wall of the limiting groove forms a circumferential constraint on the outer circumference of the rotating shaft, preventing the rotating shaft from axially moving or radially shifting during the repeated opening and closing of the buckle, ensuring that the movement trajectory of the buckle rotating around the rotating shaft remains stable. The clearance fit between the groove wall of the limiting groove and the outer circumference of the rotating shaft not only ensures that the rotating shaft can rotate freely, but also controls the positional offset of the rotating shaft within a reasonable range, avoiding changes in the fit relationship between the locking part and the upper ring due to the positional drift of the rotating shaft, which would affect the locking effect.

[0020] Furthermore, the fastener is made of a flexible metal material.

[0021] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by using elastic metal material to make the fastener, the fastener can withstand periodic bending stress without plastic deformation or fatigue fracture during repeated locking and unlocking operations. The excellent elastic modulus of the elastic metal material ensures that the fastener can quickly return to its original shape after being subjected to force, maintaining a stable contact state between the locking part and the upper ring. The elastic material can also absorb the impact vibration energy generated by the pulse jet of the dust collector, reducing the damage of vibration to the locking mechanism. At the same time, the metal material has good wear resistance and corrosion resistance, which can adapt to the harsh working environment of high temperature dust-containing gas inside the dust collector and extend the service life of the locking mechanism.

[0022] Furthermore, the support rod has a cylindrical rod-shaped structure, and the number of support rods is 6 to 12.

[0023] The beneficial effects of adopting the above-mentioned improvement scheme are as follows: by designing the support rods as cylindrical rod structures and controlling the number to 6 to 12, the frame body obtains sufficient radial support stiffness to resist the radial expansion force generated by the filter bag during pulse cleaning. The cylindrical rod structure has a uniform moment of inertia of the cross section, which can provide the same bending resistance in all directions and avoid the generation of local weak links. The configuration of 6 to 12 rods ensures the support strength while controlling the weight of the frame. Too many support rods will increase the self-weight of the frame and the manufacturing cost, while too few will not provide sufficient support. This number range achieves the best balance between support performance and economy.

[0024] Furthermore, the outer diameter of the upper ring is larger than that of the lower ring, the distance from the connection point of the support rod and the upper ring to the geometric center of the upper ring is greater than the distance from the connection point of the support rod and the lower ring to the geometric center of the lower ring, and the frame body has a frustum-shaped structure that is larger at the top and smaller at the bottom.

[0025] The beneficial effects of adopting the above-mentioned improved scheme are as follows: By making the outer diameter of the upper ring larger than that of the lower ring and making the frame body a frustum-shaped structure with a larger upper diameter and a smaller lower diameter, the filter bag can slide smoothly down the support rod naturally under the action of gravity when it is fitted onto the frame body. This avoids the filter bag installation resistance caused by the frame having equal upper and lower diameters or a larger lower diameter and a smaller upper diameter. The frustum-shaped structure also makes the radial tension force distribution on the filter bag more reasonable during use. The larger diameter at the upper end provides sufficient opening space for the top of the filter bag, ensuring that the pulse airflow can enter the interior of the filter bag evenly to achieve efficient dust removal. The smaller diameter at the lower end keeps the bottom of the filter bag in a moderately tightened state, preventing dust-laden gas from leaking from the gap between the bottom of the filter bag and the frame, thereby improving filtration efficiency.

[0026] Compared with existing technologies, the advantages of the quick-release filter bag frame assembly for a pulse dust collector provided by this utility model are as follows: This utility model achieves quick locking and unlocking between the frame assembly and the tube sheet by setting a locking mechanism consisting of a fixed seat and a snap fastener on the outer circumferential surface of the upper ring of the frame body. This completely changes the traditional threaded connection operation mode that requires repeated rotation. Operators only need to rotate the operating part of the snap fastener to complete the fixing or disassembly of the frame within seconds, improving maintenance efficiency several times. The limiting protrusion in the locking mechanism forms a reliable surface contact with the outer circumferential surface of the upper ring, and the resulting clamping force is sufficient to resist the vibration and impact during pulse jet cleaning of the dust collector, ensuring that the frame will not loosen or fall off during long-term operation. The locking reliability is no less than that of traditional threaded connections. After the snap fastener is unlocked, the engaging part can be completely housed in the receiving gap between the fixed seat and the upper ring, without causing any obstruction to the removal of the frame, and the disassembly process is smooth and without jamming. The design of the guide slope gives the frame an automatic guiding function when inserted into the tube sheet hole, reducing the difficulty of installation and positioning. The non-slip textured operating part ensures reliable grip and precise operation under various working conditions. The snap-fit ​​mechanism, made of elastic metal, boasts excellent fatigue resistance and durability, withstanding tens of thousands of repeated opening and closing operations without failure. The frustum-shaped frame body makes filter bag installation easier and improves filtration efficiency. This quick-release structure requires no special tools, allowing ordinary maintenance personnel to complete the operation quickly, significantly reducing maintenance costs and downtime losses for dust collection systems. It is particularly suitable for high dust concentration conditions requiring frequent filter bag replacements. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A schematic diagram of the structure of a quick-release filter bag frame assembly for a pulse dust collector device;

[0029] Figure 2 This is a schematic diagram of the inner side of the engaging part;

[0030] Figure 3 This is a schematic diagram of the structure of the outer surface of the engaging part;

[0031] The attached diagram lists the components represented by each number as follows:

[0032] 10. Frame body; 11. Upper ring; 12. Lower ring; 13. Support rod; 20. Locking mechanism; 21. Fixing seat; 22. Fastener. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0034] like Figure 1-3 The diagram shows a structural schematic of a quick-release filter bag frame assembly for a pulse dust collector device provided by this utility model. The assembly includes a frame body 10 and a locking mechanism 20. The frame body includes an upper ring 11 and a lower ring 12. The upper and lower rings are connected by several support rods 13, which are evenly distributed along the circumference of the upper ring. The upper end of each support rod is fixedly connected to the upper ring, and the lower end is fixedly connected to the lower ring. The locking mechanism is located on the upper ring and includes a fixed seat 21 and a latching member 22. The fixed seat is fixedly connected to the outer circumferential surface of the upper ring, and the latching member is hinged to the fixed seat via a rotating shaft. The latching member has an engaging portion and an operating portion. The engaging portion is located on one side of the rotating shaft, and the operating portion is located on the other side. The free end of the engaging portion extends away from the upper ring. A limiting protrusion is provided on the inner surface of the engaging portion. When the latching member is in the locked state, the limiting protrusion contacts the outer circumferential surface of the upper ring.

[0035] In the above technical solution, the length of the limiting protrusion along the tangent of the upper circumference is greater than the length of the engaging part along the tangent of the upper circumference.

[0036] Furthermore, in the above technical solution, a receiving gap is formed between the bottom of the fixing seat and the outer circumferential surface of the upper ring. The height of the receiving gap is greater than the thickness of the engaging part, and the engaging part is located within the receiving gap when in the unlocked state.

[0037] Furthermore, in the above technical solution, the limiting protrusion has an arc-shaped boss structure, and the arc-shaped surface of the limiting protrusion matches the curvature of the outer circumferential surface of the upper ring.

[0038] Furthermore, in the above technical solution, the free end of the engaging part is provided with a guide slope, and the guide slope forms an acute angle with the extension direction of the engaging part.

[0039] Furthermore, in the above technical solution, the operating part has an arc-shaped plate structure, and the outer surface of the operating part is provided with anti-slip texture, which consists of several grooves distributed radially.

[0040] Furthermore, in the above technical solution, a limiting groove is provided on the fixed seat, the limiting groove penetrates through the fixed seat, and both ends of the rotating shaft are respectively inserted into the limiting groove, and the groove wall of the limiting groove forms a clearance fit with the outer circumferential surface of the rotating shaft.

[0041] Furthermore, in the above technical solution, the fastener is made of a flexible metal material.

[0042] Furthermore, in the above technical solution, the support rod has a cylindrical rod structure, and the number of support rods is 6 to 12.

[0043] Furthermore, in the above technical solution, the outer diameter of the upper ring is larger than that of the lower ring, the distance from the connection point of the support rod and the upper ring to the geometric center of the upper ring is greater than the distance from the connection point of the support rod and the lower ring to the geometric center of the lower ring, and the frame body has a frustum-shaped structure that is larger at the top and smaller at the bottom.

[0044] The following is a specific embodiment 1 of this utility model: In this embodiment, the upper ring of the frame body is a stainless steel ring with a diameter of 150mm, the material is 304 stainless steel, and the wall thickness is 3mm. The lower ring has a diameter of 130mm, the material and wall thickness are the same as the upper ring. The upper ring and the lower ring are connected by 8 support rods. The support rods are stainless steel cylindrical rods with a diameter of 8mm and a length of 2000mm. The 8 support rods are evenly distributed along the circumference of the upper ring. The central angle between adjacent support rods is 45°. The upper end of the support rod is welded to the outer circumference of the upper ring by argon arc welding, and the lower end is welded to the outer circumference of the lower ring, forming a frustum-shaped frame structure that is larger at the top and smaller at the bottom. The cone angle of the frustum is about 1~3°. The mounting base is made of cast aluminum alloy and has a U-shaped structure. The base plate is fixed to the outer circumference of the upper ring with three M5 stainless steel bolts. The two side plates of the mounting base extend upwards by 30mm. Each side plate has a rectangular limiting groove with a width of 10mm and a height of 12mm, which runs through the side plate. The central axes of the two limiting grooves are collinear. An 8mm clearance is provided between the base plate and the outer circumference of the upper ring to accommodate the locking part in the unlocked state. The rotating shaft is a 9mm diameter stainless steel cylindrical rod with a length of 35mm. Both ends of the rotating shaft pass through the limiting grooves of the two side plates. A 0.5mm clearance is provided between the outer circumference of the rotating shaft and the groove wall to achieve a clearance fit, ensuring that the rotating shaft can rotate freely while controlling the axial and radial displacement of the rotating shaft within a reasonable range. The fastener is formed by stamping and bending 3mm thick 65Mn spring steel plate, and is L-shaped overall. A round hole is opened in the middle of the fastener to fit onto the rotating shaft, forming a hinge. One end of the fastener is the engaging part, 60mm long and 25mm wide. An arc-shaped boss is provided on the inner side of the engaging part, 20mm from the free end, as a limiting protrusion. The limiting protrusion is 15mm wide along the length of the engaging part and 30mm long along the width of the engaging part. The radius of curvature of the arc surface of the limiting protrusion is 75mm, matching the radius of curvature of the outer circumference of the upper ring. The height of the limiting protrusion is 4mm. A guide slope with an inclination angle of 30° and a length of 8mm is provided at the free end of the engaging part. The other end of the buckle is the operating part, 40mm long and 30mm wide. The operating part is curved into an arc shape with a radius of curvature of 50mm. Six radially milled grooves, each 1.5mm deep and 2mm wide, form an anti-slip texture on the outer surface of the operating part. These six grooves are evenly distributed radially. When the operator presses down on the operating part to rotate the buckle to the locked position, the arc-shaped surface of the limiting protrusion presses against the outer circumference of the upper ring, with a contact area of ​​approximately 450cm². 2The resulting clamping force is maintained between 80N and 120N through the elastic deformation of the spring steel. The static friction coefficient between the limiting protrusion and the upper stainless steel ring is approximately 0.3, and the resulting locking force is sufficient to resist the vibration and impact generated by the dust collector under a 0.5 MPa pulse pressure. The total weight of the frame body is approximately 3 kg, and it can be easily assembled and disassembled by a single person, with each assembly and disassembly taking between 8 and 12 seconds.

[0045] The following is another specific embodiment 2 of this utility model: Embodiment 2 is based on Embodiment 1, but the single limiting protrusion on the inner side of the engaging portion is improved to two limiting protrusions. The two limiting protrusions are distributed along the length of the engaging portion, located at positions 15mm and 45mm from the free end of the engaging portion, respectively. Each limiting protrusion has the same dimensions: a width of 12mm in the length direction, a length of 30mm in the width direction, and a height of 4mm. The radius of curvature of the arc surface of both limiting protrusions is 75mm. The inner surface of the engaging portion between the two limiting protrusions is recessed inward to form a V-shaped groove with a depth of 2mm and an included angle of 120°. When the fastener is locked, the two limiting protrusions simultaneously press against the outer circumference of the upper ring. The two contact areas distribute the pressing force, making the pressure distribution more uniform. The stress in a single contact area is reduced by approximately 40%, further reducing wear on the surface of the upper ring. The V-shaped groove design increases the flexibility of the engaging portion, allowing the two limiting protrusions to better adapt to minor unevenness on the surface of the upper ring, improving contact reliability. The two dispersed contact points also improve the torsional resistance of the locking mechanism, making it less prone to rotation around the upper ring axis when the frame is subjected to lateral forces, thus improving locking stability by about 25%.

[0046] The following is another specific embodiment 3 of this utility model: Embodiment 3 is based on Embodiment 1, with an elastic buffer pad added between the fixed base and the upper ring. This elastic buffer pad is made of high-temperature resistant silicone rubber material, with a Shore A hardness of 70° to 80° and a thickness of 2mm. The buffer pad has a ring-shaped sheet structure, with its inner diameter matching the outer diameter of the upper ring and its outer diameter being 2mm smaller than the width of the fixed base plate. The buffer pad is fitted onto the mounting bolts of the fixed base through three round holes, located between the fixed base plate and the outer circumference of the upper ring. The elastic buffer pad allows the clamping force generated by the limiting protrusion to be partially absorbed by the elastic deformation of the buffer pad when the buckle is locked. The compression of the buffer pad is approximately 0.5mm to 1mm. This elastic compression generates a rebound force that provides additional pre-tightening effect, giving the locking connection a certain degree of self-adaptability. When the upper ring experiences slight thermal expansion or contraction due to temperature changes, the elastic buffer pad can compensate for the dimensional changes by adjusting the deformation, maintaining stable locking force and avoiding locking failure due to temperature fluctuations. Silicone rubber material also possesses excellent vibration damping properties. Its damping characteristics can absorb the high-frequency vibration energy transmitted to the locking mechanism during pulse jet cleaning of the dust collector, reducing the peak vibration acceleration by approximately 30% to 40%. This effectively reduces fatigue damage to the fasteners and mounting bases, extending the service life of the locking mechanism. The high-temperature resistance of the elastic buffer pad allows it to maintain stable elastic modulus and damping characteristics within the dust collector's internal operating temperature range of 80℃ to 150℃. It will not fail due to high-temperature aging, and the buffer pad's service life can reach 2 to 3 years, comparable to the filter bag replacement cycle. The buffer pad can be replaced simultaneously when replacing the filter bag, maintaining the optimal performance of the locking mechanism.

[0047] Specifically, the principle of this utility model is as follows: This utility model uses a hinged snap-locking mechanism to replace the traditional threaded connection, fundamentally changing the way the frame is fixed. The snap-locking component in the locking mechanism is hinged to the fixed seat through a rotating shaft, allowing the snap-locking component to rotate around the rotating shaft in the horizontal plane. This rotational movement allows the engaging part of the snap-locking component to quickly switch between the locked and unlocked positions. When the operator presses down on the operating part, due to the lever effect of the rotating shaft, the engaging part rotates upward, causing the inner limiting protrusion to press against the outer circumferential surface of the upper ring. The arc-shaped surface of the limiting protrusion and the curvature of the outer circumferential surface of the upper ring match to form a large-area contact. The positive pressure generated is converted into a locking force to resist the axial movement of the frame through static friction. The magnitude of this locking force depends on the torque applied by the operating part and the coefficient of friction between the limiting protrusion and the upper ring. The elastic deformation of the elastic metal material can also generate a preload, ensuring the stability of the locked state. When the frame needs to be disassembled, the operator lifts the operating part upwards, and the locking part rotates downwards to disengage the limiting protrusion from the upper ring. The locking part then fully enters the receiving gap between the fixed seat and the upper ring. At this point, the frame is no longer subject to any axial constraint and can be freely removed. The entire locking and unlocking process only requires rotating the fasteners by about 90°, reducing the operation time to a few seconds. The design of the frustum-shaped frame body provides a downward guiding force to the filter bag during installation. The combined force of gravity and the conical surface helps the filter bag smoothly fit into the frame, and the filter bag can also be easily removed from the frame during disassembly. The cylindrical structure and reasonable number of support rods ensure that the frame has sufficient rigidity when subjected to pulse jet impact, preventing excessive deformation that could affect the working state of the filter bag. The limiting groove constrains the rotating shaft, ensuring that the rotation axis of the fasteners remains stable and preventing a decrease in locking effect due to axis misalignment. The anti-slip texture ensures that the operator can apply sufficient rotational torque without slippage.

[0048] When installing the frame assembly, the operator first inserts the frame assembly with the filter bag already fitted into the dust collector through the inspection door at the top of the unit, aligning it with the mounting holes on the tube sheet. Since the locking mechanism is in the unlocked state, the engaging part is contained within the receiving gap and will not protrude, allowing the upper ring of the frame to be smoothly inserted into the tube sheet hole. At this point, the guide slope at the free end of the engaging part contacts the edge of the tube sheet hole, providing guidance and helping the operator quickly and accurately position the frame correctly. Once the upper ring has completely passed through the tube sheet hole, the operator grasps the operating part of the locking mechanism with their fingers or a tool. The anti-slip texture on the outer surface of the operating part provides reliable grip friction. Pressing down on the operating part causes it to rotate downwards about 90° around the axis. The engaging part then rotates upwards, and the limiting protrusion on the inner side of the engaging part moves out of the receiving gap and presses against the outer circumference of the upper ring. The arc-shaped surface of the limiting protrusion fits tightly against the outer circumference of the upper ring, generating pressure and completing the locking action. The entire installation process takes only about 10 seconds. During use, the frame is periodically cleaned by high-pressure gas injected by the pulse valve. The resulting vibration and impact are absorbed by the static friction between the limiting protrusion and the upper ring. The elastic deformation of the elastic metal material absorbs part of the vibration energy, ensuring that the frame does not loosen. When the frame needs to be disassembled to replace the filter bag, the operator lifts the operating part of the fastener upwards, and the engaging part rotates downwards by about 90°. The limiting protrusion disengages from the upper ring and is completely retracted into the receiving gap. The frame loses its axial constraint, and the operator can directly lift the frame upwards to remove it from the tube sheet hole. The disassembly process also only takes about 10 seconds, which is more than 5 times more efficient than the traditional threaded connection method.

Claims

1. A quick-release filter bag frame assembly for a pulse dust collector, characterized in that, The device includes a frame body and a locking mechanism. The frame body comprises an upper ring and a lower ring, which are connected by several support rods. The support rods are evenly distributed along the circumference of the upper ring, with the upper end of each support rod fixedly connected to the upper ring and the lower end of each support rod fixedly connected to the lower ring. The locking mechanism is mounted on the upper ring and includes a fixed base and a latching element. The fixed base is fixedly connected to the outer circumferential surface of the upper ring, and the latching element is hinged to the fixed base via a rotating shaft. The latching element has an engaging portion and an operating portion. The engaging portion is located on one side of the rotating shaft, and the operating portion is located on the other side of the rotating shaft. The free end of the engaging portion extends away from the upper ring, and a limiting protrusion is provided on the inner surface of the engaging portion. When the latching element is in the locked state, the limiting protrusion contacts the outer circumferential surface of the upper ring.

2. The quick-release filter bag frame assembly of a pulse dust collector according to claim 1, characterized in that, The length of the limiting protrusion along the tangent of the upper circumference is greater than the length of the engaging part along the tangent of the upper circumference.

3. The quick-release filter bag frame assembly of a pulse dust collector according to claim 2, characterized in that, A receiving gap is formed between the bottom of the fixing seat and the outer circumferential surface of the upper ring. The height of the receiving gap is greater than the thickness of the engaging part. The engaging part is located within the receiving gap when in the unlocked state.

4. The quick-release filter bag frame assembly of a pulse dust collector according to claim 3, characterized in that, The limiting protrusion has an arc-shaped boss structure, and the arc-shaped surface of the limiting protrusion matches the curvature of the outer circumference of the upper ring.

5. The quick-release filter bag frame assembly of a pulse dust collector according to claim 4, characterized in that, The free end of the engaging portion is provided with a guide slope, and the guide slope forms an acute angle with the extending direction of the engaging portion.

6. The quick-release filter bag frame assembly of a pulse dust collector according to claim 5, characterized in that, The operating part has an arc-shaped plate structure, and the outer surface of the operating part is provided with anti-slip texture, which is a number of grooves distributed radially.

7. The quick-release filter bag frame assembly of a pulse dust collector according to claim 6, characterized in that, The fixed base is provided with a limiting groove, which penetrates the fixed base. Both ends of the rotating shaft are respectively inserted into the limiting groove, and the groove wall of the limiting groove forms a clearance fit with the outer circumferential surface of the rotating shaft.

8. The quick-release filter bag frame assembly of a pulse dust collector according to claim 7, characterized in that, The fastener is made of a flexible metal material.

9. The quick-release filter bag frame assembly of a pulse dust collector according to claim 8, characterized in that, The support rod has a cylindrical rod-shaped structure, and the number of support rods is 6 to 12.

10. A quick-release filter bag frame assembly for a pulse dust collector according to claim 9, characterized in that, The outer diameter of the upper ring is larger than that of the lower ring, the distance from the connection point of the support rod and the upper ring to the geometric center of the upper ring is greater than the distance from the connection point of the support rod and the lower ring to the geometric center of the lower ring, and the frame body has a frustum-shaped structure that is larger at the top and smaller at the bottom.

Images