Tin smoke dust pipeline caking crushing device free of complete machine disassembly and maintenance

Abstract

The utility model relates to a tin smoke dust pipeline caking crushing device free of complete machine disassembly and maintenance, which comprises a split type shell, a main shaft assembly, a hammer block assembly and a sealing lubrication assembly, the split type shell comprises a first shell and a second shell, and after the first shell and the second shell are connected, a crushing space is formed in the first shell and the second shell; a manhole and a detachable cover plate are arranged on the side surface of the crushing space; the hammer block assembly comprises at least two hammer block fixing rod connecting discs distributed in the axial direction of the main shaft at intervals, a plurality of pluggable hammer block fixing rods and a plurality of hammer blocks installed on the hammer block fixing rods in a clearance fit mode, and the hammer blocks are symmetrically distributed through hammer block spacer bushes to achieve dynamic balance. Rapid maintenance is achieved through the design of the modular access hole and the pluggable hammer block fixing rod, and the maintenance time is shortened; the hammer block assemblies achieve high-speed dynamic balance through symmetrical distribution and clearance fit, and the crushing granularity is smaller than or equal to 5 mm. The device is suitable for a crude tin smelting system, effectively solves the problem of soot caking and blocking, reduces the annual maintenance cost, and has remarkable economic benefits.

Description

A tin fume dust pipeline agglomeration crushing device that requires no complete disassembly and maintenance. Technical Field

[0001] This utility model relates to the field of tin smelting fume treatment technology, and more specifically to a tin fume agglomeration crushing device that can be embedded in the conveying pipeline without the need for complete disassembly and maintenance. It is particularly suitable for crushing scenarios involving highly viscous fume agglomerates containing metallic impurities. Background Technology

[0002] In the crude tin smelting process, the recovery and treatment of flue dust is a crucial step in ensuring resource utilization and production continuity. The flue dust is rich in metallic tin (≥60%) and must be collected centrally via pneumatic conveying pipelines before being returned to the furnace for remelting. However, during the enrichment process, the flue dust easily forms high-hardness agglomerates (particle size ≥20mm). If these agglomerates are not crushed and directly enter the conveying pipeline, they will quickly cause pipe wall adhesion and mechanical blockage, leading to system shutdown. Taking a 400mm×400mm square conveying pipeline as an example, a single blockage can cause system downtime losses of tens of thousands of yuan per hour, severely restricting smelting capacity.

[0003] Analysis of existing technological deficiencies:

[0004] Adaptability failure of twin-screw extrusion crushers: Although such equipment can theoretically handle agglomerated materials, its core design has a fatal flaw—the crushing gap is fixed at 7mm. In crude tin smelting scenarios, the amount of dust generated can reach 6 tons / hour. The fine particles (≤1mm accounting for 70%) carried by the high flow rate of material will instantly fill the screw gap, forming a dense blockage layer. Actual operating data shows that the equipment needs to be stopped for cleaning after less than 30 minutes of continuous operation, which is completely unable to meet the needs of continuous production.

[0005] The bottleneck in maintenance efficiency of traditional hammer crushers: Although commercially available hammer crushers possess a certain crushing capacity, their integral structural design results in extremely poor maintainability. When the hammers wear out or the seals fail, the entire machine (including bearing housings, transmission components, etc.) must be disassembled, with a single maintenance session taking up to 6 hours. More importantly, frequent disassembly and assembly will damage the dynamic balance accuracy of the main shaft, accelerate bearing wear, and create a vicious cycle of "maintenance-performance degradation-re-maintenance," increasing annual maintenance costs by approximately 45%.

[0006] The fundamental contradiction between the two types of equipment mentioned above lies in:

[0007] Twin-shaft screw crushers sacrifice throughput adaptability in pursuit of small particle size crushing (≤7mm), which conflicts with the high flow characteristics of coarse tin dust; hammer crushers adopt an overall enclosed design to maintain structural strength, but this conflicts with the need for high-frequency maintenance.

[0008] This contradiction is further amplified in the crude tin smelting scenario: hard impurities such as iron filings and broken ore (accounting for 3%-5%) mixed in with the flue dust exacerbate the wear of the hammer and bearings, while traditional sealing structures are prone to failure under frequent disassembly and assembly conditions, leading to lubrication contamination and bearing seizure. The industry has long been caught in a dilemma where it is difficult to balance "crushing efficiency" and "maintenance costs".

[0009] Therefore, how to provide a tin fume pipeline agglomeration and crushing device that does not require complete disassembly and maintenance is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0010] Therefore, the purpose of this utility model is to propose a tin fume pipeline agglomeration and crushing device that eliminates the need for complete machine disassembly and maintenance, thereby resolving the existing contradictions in the prior art.

[0011] The technical solution of this utility model is a tin fume dust pipeline agglomeration and crushing device that requires no complete machine disassembly and maintenance, comprising:

[0012] The split-type housing includes a detachable first housing and a second housing. After the first housing and the second housing are connected, a crushing space is formed inside. The crushing space is provided with an inspection hole and a detachable cover plate on its side.

[0013] The main shaft assembly includes a main shaft that extends through the crushing space, double-row self-aligning ball bearings and bearing housings symmetrically mounted at both ends of the main shaft;

[0014] The hammer block assembly includes at least two hammer block fixing rod connecting discs spaced apart along the main shaft axis, a plurality of pluggable hammer block fixing rods, and a plurality of hammer blocks fitted with clearance on the hammer block fixing rods. The hammer blocks are symmetrically distributed through hammer block spacers to achieve dynamic balance.

[0015] The contact surface between the first housing and the second housing is statically sealed, while the sealing points at both ends of the main shaft and the crushing space are dynamically sealed.

[0016] According to the crushing device of this utility model, the inspection hole is opened on both sides of the first housing and / or the second housing, the detachable cover is sealed and detachable at the inspection hole, and multiple hammers are allowed to be removed when disassembled.

[0017] According to the crushing device of this utility model, the hammer block fixing rod connecting plate is connected to the main shaft by a symmetrical flat key, and the adjacent hammer block fixing rod connecting plates are axially positioned by a connecting plate spacer and fixed to the main shaft by a locking nut.

[0018] According to the crushing device of this utility model, the two ends of the hammer block fixing rod extend out of the hammer block fixing rod connecting plate and are connected by threaded fasteners, and the clearance fit between the hammer block and the hammer block fixing rod is 0.5-1.5mm.

[0019] According to the crushing device of this utility model, four mounting holes are evenly distributed in the circumferential direction of the hammer block fixing rod connecting plate, and each mounting hole corresponds to the installation of a hammer block fixing rod. At least two hammer blocks are symmetrically arranged on the hammer block fixing rod, and adjacent hammer blocks are separated by hammer block spacers. The length of the hammer block spacer is 1.1-1.3 times the width of the hammer block.

[0020] According to the crushing device of this utility model, the first housing and / or the second housing are provided with hammer fixing rod replacement holes on both sides along the length direction of the main shaft, and the hammer fixing rod replacement holes are provided with detachable replacement hole covers.

[0021] According to the crushing device of this utility model, the first housing and / or the second housing have a base for mounting bearing seats.

[0022] According to the crushing device of this utility model, the dynamic seal adopts a sealing lubrication assembly. The sealing lubrication assembly includes two sealing packing seats coupled to both sides of the main shaft and the crushing space. Each sealing packing seat has an oil reservoir ring sleeved on the main shaft. The oil reservoir ring is sandwiched between two sets of graphite packings. Its outer circumference is clearance-fitted with the sealing packing seat, and lubricant is injected through the oil injection hole on the sealing packing seat to form continuous lubrication.

[0023] According to the crushing device of this utility model, the oil storage ring is an annular groove structure with radial oil outlet holes evenly distributed in the groove. The radial clearance between the oil storage ring and the sealing packing seat is 0.3-0.8 mm, and the radial clearance between the oil storage ring and the main shaft is 3-8 mm.

[0024] According to the crushing device of this utility model, the rotational speed of the main shaft is ≥1200rpm, the dynamic balance error of the symmetrical distribution of the hammer blocks is ≤0.1mm, and the particle size of the dust after crushing is ≤5mm.

[0025] As can be seen from the above technical solution, compared with the prior art, this utility model has the following beneficial effects:

[0026] 1. The technical solution of this utility model improves the efficiency of modular quick-disassembly maintenance. Through the design of split housing (first housing and second housing) and inspection hole, only the cover plate needs to be removed and the hammer block fixing rod needs to be pulled out during maintenance. There is no need to remove the bearing seat or spindle. The single maintenance time is shortened from the traditional 6 hours to 1.5 hours, and the annual downtime is reduced by more than 200 hours.

[0027] The pluggable design of the hammer block fixing rod of this utility model, combined with the symmetrical distribution of the hammer block spacers, enables quick replacement of the hammer blocks, and the dynamic balance error is ≤0.1mm, avoiding the problem of increased vibration due to maintenance.

[0028] 2. The technical solution of this utility model optimizes the long-term sealing and lubrication performance. The dynamic sealing structure adopts the coordinated lubrication of oil storage ring and oil injection hole. The design of the annular groove and radial oil outlet of the oil storage ring allows the lubricant to penetrate evenly into the graphite packing. The sealing life is extended from the traditional 3 months to more than 6 months, and the annual maintenance cost is reduced by 35%.

[0029] The clearance fit between the oil reservoir ring and the sealing packing seat (0.3-0.8mm) and the clearance between the oil reservoir ring and the spindle (3-8mm) prevent frictional loss and effectively prevent dust from entering the bearing.

[0030] 3. The technical solution of this utility model enhances the adaptability to highly viscous materials containing impurities. The gap fit between the hammer block and the hammer block fixing rod (0.5-1.5mm) allows slight vibration to cause the viscous material to fall off. Combined with the impact resistance of the double-row self-aligning ball bearing, it can handle dust containing 3%-5% iron filings and impurities, and the continuous operation cycle of the equipment is increased to 2000 hours.

[0031] The ratio of the length of the hammer block spacer to the width of the hammer block is 1.1-1.3 times to ensure that the crushing particle size is ≤5mm and the pipe blockage rate is close to zero.

[0032] 4. The technical solution of this utility model has good dynamic balance and high speed stability. The hammer block fixing rod connecting plate is connected by symmetrical flat key and axially positioned by connecting plate spacer sleeve. With the main shaft speed ≥1200rpm, it can achieve stable operation under high speed crushing and the processing capacity reaches 6 tons / hour. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 is an exploded view of a tin fume pipeline agglomeration and crushing device that eliminates the need for complete machine disassembly and maintenance provided by this utility model.

[0035] Figure 2 is a schematic diagram of the overall structure of a tin fume pipeline agglomeration and crushing device that requires no complete disassembly and maintenance, provided by this utility model (partial explosion).

[0036] In the diagram: 1-First housing, 2-Hammer fixing rod replacement hole, 3-Replacement hole cover, 4-Hammer fixing rod connecting plate, 5-Hammer fixing rod, 6-Sealing packing seat, 7-Oil reservoir ring, 8-Sealing packing gland, 9-First bearing seat, 10-Spindle, 11-First double-row self-aligning ball bearing, 12-First bearing gland, 13-Base, 14-Second housing, 15-Hammer spacer, 16-Hammer, 17-Connecting plate spacer, 18-Second bearing gland, 19-Second double-row self-aligning ball bearing, 20-Second bearing seat, 21-Locking nut, 22-Oil injection hole, 23-Removable cover plate, 24-Inspection hole. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] Existing twin-shaft screw crushers, in pursuit of small particle size (≤7mm), sacrifice throughput adaptability, conflicting with the high flow characteristics of coarse tin fumes. Hammer crushers, employing an overall enclosed design to maintain structural strength, clash with the need for frequent maintenance. In coarse tin smelting scenarios, both types of crushers suffer from increased wear on hammers and bearings due to hard impurities (3%-5%) such as iron filings and ore fragments mixed in the fumes. Traditional sealing structures are prone to failure under frequent disassembly and reassembly, leading to lubrication contamination and bearing seizure. The industry has long been caught in a dilemma of balancing crushing efficiency and maintenance costs.

[0040] In view of this, the present invention provides a tin fume pipe agglomeration crushing device that does not require complete machine disassembly and maintenance, as shown in Figures 1-2, including: a split housing, a main shaft assembly, a hammer block assembly, etc.;

[0041] The split housing includes a detachable first housing 1 and a second housing 14. After the first housing 1 and the second housing 14 are connected, a crushing space is formed inside. The crushing space is provided with an inspection hole 24 and a detachable cover plate 23 on its side. The main shaft assembly includes a main shaft 10 that passes through the crushing space, double-row self-aligning ball bearings and bearing seats symmetrically installed at both ends of the main shaft 10. The hammer assembly includes at least two hammer fixing rod connecting discs 4 that are spaced apart along the axial direction of the main shaft 10, a plurality of pluggable hammer fixing rods 5, and a plurality of hammers 16 that are clearance-fitted onto the hammer fixing rods 5. The hammers 16 are symmetrically distributed through hammer spacers 15 to achieve dynamic balance. The contact surface between the first housing 1 and the second housing 14 is statically sealed, and the sealing points between the main shaft 10 and both ends of the crushing space are dynamically sealed.

[0042] The embodiments of this utility model, through the design of the first housing, the second housing, and the inspection hole, only require the removal of the cover plate during maintenance. The hammer block fixing rod can be pulled out from the housing without removing the bearing seat or the main shaft. The single maintenance time is shortened from the traditional 6 hours to 1.5 hours, and the annual downtime is reduced by more than 200 hours, thus improving the efficiency of modular quick-disassembly maintenance.

[0043] Advantageously, the access hole 24 is provided on both sides of the first housing 1 and / or the second housing 14, the removable cover 23 is sealed and removable at the access hole 24, and allows multiple hammers 16 to be removed when disassembled.

[0044] Referring to Figures 1 and 2, in a specific embodiment of this utility model, inspection holes 24 can be opened on both sides of the first housing 1 perpendicular to the main shaft. The edge of the detachable cover plate 23 has multiple bolt holes, which are bolted to the first housing. The size of the inspection holes is preferably large enough to accommodate two or more hammers. Two handles are symmetrically installed on the outside of the detachable cover plate 23 for easy removal.

[0045] Advantageously, in a specific embodiment of this utility model, the hammer block fixing rod connecting plate 4 is connected to the main shaft 10 by a symmetrical flat key, and adjacent hammer block fixing rod connecting plates 4 are axially positioned by a connecting plate spacer 17 and fixed to the main shaft 10 by a locking nut 21.

[0046] Advantageously, both ends of the hammer block fixing rod 5 extend out of the hammer block fixing rod connecting plate 4 and are connected by threaded fasteners. The clearance fit between the hammer block 16 and the hammer block fixing rod 5 is 0.5-1.5mm. The hammer block fixing rod connecting plate 4 has four mounting holes evenly distributed circumferentially, each corresponding to one hammer block fixing rod 5. At least two hammer blocks 16 are symmetrically arranged on the hammer block fixing rod 5, and adjacent hammer blocks 16 are separated by hammer block spacers 15. The length of the hammer block spacer 15 is 1.1-1.3 times the width of the hammer block 16. The pluggable design of the hammer block fixing rod, combined with the symmetrical distribution of the hammer block spacers, enables quick replacement of the hammer blocks, and the dynamic balance error is ≤0.1mm, avoiding the problem of increased vibration due to maintenance. The hammer block fixing rod connecting plate, through symmetrical flat key connection and axial positioning by the connecting plate spacers, combined with a spindle speed ≥1200rpm, achieves stable operation under high-speed crushing, with a processing capacity of 6 tons / hour.

[0047] In this invention, the length of the hammer block spacer is set to 1.1-1.3 times the width of the hammer block, and its core function is:

[0048] Controlling the spacing between hammers is crucial, as the length of the spacer determines the axial distance (i.e., the crushing zone) between adjacent hammers. When the spacer length is 1.1-1.3 times the width of the hammer, the width of the material flow channel between the hammers and the hammer's impact stroke are optimally matched: If it is too short (<1.1 times): the material tends to accumulate in the narrow gap, the hammer impact trajectory overlaps significantly, resulting in wasted crushing energy, and sticky dust easily adheres and clumps; If it is too long (>1.3 times): the hammer spacing is too large, the number of impacts on the material decreases, large particles (≥5mm) easily escape, leading to insufficient crushing.

[0049] Dynamic crushing mode: When the main shaft rotates at high speed (≥1200rpm), the hammer blocks unfold through centrifugal force to form a "rotational crushing surface". The length ratio of the spacer ensures that the crushing surface coverage of adjacent hammer blocks is continuous and non-overlapping, forming a multi-stage shearing and impact compound action on the material, thereby crushing the agglomerates to the target particle size (≤5mm) step by step.

[0050] Verification of a crushed particle size ≤5mm when the spacer length is 1.3 times the hammer width: The key to ensuring the crushed particle size when the hammer spacer length is increased to 1.3 times the hammer width lies in the fact that the larger axial spacing reduces the axial flow velocity of the dust in the crushing chamber, and the same agglomerate is hit multiple times by adjacent hammers (from 3 times to 5 times), significantly improving the thoroughness of crushing. The longer spacer spacing changes the hammer's impact action from "impact-based" to "shear-based", resulting in better stripping effect on highly viscous agglomerates.

[0051] Experimental data shows that when the length of the spacer increases from 1.1 times to 1.3 times, the proportion of ≤5mm particles in the dust after crushing increases from 92% to 98%.

[0052] This invention significantly improves the flowability of dust particles with a crushing size ≤5mm in pipelines (Reynolds number Re>2000), making them less prone to deposition and clogging. The symmetrical distribution design of the hammer block spacers ensures that the dynamic balance error of the main shaft is ≤0.1mm, avoiding pipeline resonance caused by equipment vibration and further reducing the risk of blockage.

[0053] In an embodiment of this utility model, the first housing 1 and / or the second housing 14 are provided with hammer block fixing rod replacement holes 2 on both sides along the length direction of the main shaft 10, and the hammer block fixing rod replacement holes 2 are provided with detachable replacement hole covers 3.

[0054] Referring to Figure 1, in a specific embodiment of this utility model, the hammer block fixing rod replacement hole 2 is arranged along the main shaft axially at both ends of the first housing, and the hammer block fixing rod 5 can be inserted and removed from the hammer block fixing rod replacement hole 2 and closed by the replacement hole cover 3.

[0055] In an embodiment of the present invention, the first housing 1 and / or the second housing 14 have a base 13 for mounting a bearing seat.

[0056] In a specific embodiment, the base 13 is fixed to both sides of the second housing 14 to support the first bearing seat 9 and the second bearing seat 20 at the bottom. The first bearing seat 9 is equipped with a first double-row self-aligning ball bearing 11, and the second bearing seat 20 is equipped with a second double-row self-aligning ball bearing 19. The outer ends of the first bearing seat 9 and the second bearing seat 20 are respectively sealed and dustproofed by the first bearing cap 12 and the second bearing cap 18.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0058] In this embodiment of the invention, the dynamic seal employs a sealing lubrication assembly. The sealing lubrication assembly includes two sealing packing seats 6 coupled to both sides of the main shaft 10 and the crushing space. Each sealing packing seat 6 has an oil reservoir ring 7 sleeved on the main shaft 10. The oil reservoir ring 7 is sandwiched between two sets of graphite packing, with its outer circumference in clearance fit with the sealing packing seat 6. Lubricant is injected through the oil injection hole 22 on the sealing packing seat 6 to form continuous lubrication. The oil reservoir ring 7 has an annular groove structure with radially distributed oil outlet holes. The radial clearance between the oil reservoir ring 7 and the sealing packing seat 6 is 0.3-0.8 mm, and the radial clearance between the oil reservoir ring 7 and the main shaft 10 is 3-8 mm.

[0059] The dynamic sealing mechanism involves injecting lubricant into the oil reservoir. The lubricant enters the annular groove of the oil reservoir ring through the injection hole and is distributed through the outlet hole to the gaps between the packing chamber and the packing, and between the packing and the spindle journal. The lubricant's viscosity forms a continuous oil film within the gaps, filling the pores of the packing layer and preventing ultrafine particles from penetrating. Its incompressibility creates a constant pressure barrier within the sealed space, resisting the intrusion of dust and smoke. Furthermore, its surface adhesion allows the oil film to firmly adhere to the spindle and packing surfaces, preventing a surge in the coefficient of friction caused by the agglomeration of tin dioxide particles due to moisture absorption.

[0060] The dynamic sealing lubrication and compensation mechanism: The gap design of the oil reservoir ring allows the lubricating oil to form a dynamic pressure lubrication film when the spindle rotates, reducing the frictional power consumption between the packing and the shaft. Under high temperature conditions, the fluidity of the lubricant compensates for the thermal expansion deformation of the packing material, avoiding seal failure caused by the packing hardening and loss of elasticity, and eliminating the need for frequent manual tightening.

[0061] The contact surfaces of the first housing 1 and the second housing 14 are provided with a static sealing structure, which is a graphite gasket or a rubber sealing ring.

[0062] In the embodiments of this utility model, the rotational speed of the main shaft 10 is ≥1200rpm, the dynamic balance error of the symmetrical distribution of the hammer blocks 16 is ≤0.1mm, and the particle size of the dust after crushing is ≤5mm.

[0063] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection", "joining", "fixing", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0064] Installation and operation of this utility model device:

[0065] Housing assembly: The first housing 1 and the second housing 14 are aligned and connected by flange bolts. Graphite gaskets are installed on the contact surfaces to form a static seal, ensuring the airtightness of the crushing chamber. The first bearing housing 9 and the second bearing housing 20 are fixed to both sides of the first housing by the base 13. The first double-row self-aligning ball bearing 11 and the second double-row self-aligning ball bearing 19 are installed and embedded in the main shaft 10. The first bearing cap 12 and the second bearing cap 18 are adjusted to ensure that the axial clearance is ≤0.05mm.

[0066] Hammer block assembly installation: The hammer block fixing rod connecting plate 4 is symmetrically fitted onto the main shaft 10 using a flat key. Connecting plate spacers 17 are installed between adjacent connecting plates and secured with lock nuts 21, ensuring an axial spacing error ≤ 0.1mm. The hammer block fixing rod 5 is inserted into the Φ20mm mounting hole of the connecting plate. The hammer block 16 is fitted with the fixing rod 5 with a clearance fit (0.5-1.5mm). The length of the hammer block spacers 15 is set to 1.3 times the width of the hammer block. After symmetrical distribution, they are locked with threaded fasteners at both ends.

[0067] Debugging of the sealing and lubrication system: Install the graphite packing and the oil reservoir ring 7 in sequence in the sealing packing seat 6. The annular groove of the oil reservoir ring 7 is aligned with the axis of the oil injection hole 22. Molybdenum disulfide grease (10mL at a time) can be injected. Tighten the sealing packing gland 8 to a compression ratio of 25%.

[0068] Power connection and trial operation: The main shaft 10 is connected to an 11kW drive motor through a coupling. After starting, the speed is gradually increased to 1200rpm. The dynamic balance error is checked to be ≤0.1mm. After crushing, the dust is screened to confirm that the particle size is ≤5mm.

[0069] During maintenance, the hammer block is replaced as follows: After stopping the machine, remove the inspection hole cover plate 23 to expose the hammer block fixing rod replacement hole 2. Remove the threaded fasteners at both ends of the hammer block fixing rod 5, pull out the hammer block fixing rod 5 axially along the hammer block fixing rod replacement hole 2, take out the hammer block 16 in the direction perpendicular to the spindle, replace it with a new hammer block, and then install it in reverse. The whole process takes ≤1.5 hours.

[0070] Sealing system maintenance: Inject high-temperature grease monthly through the oil injection hole 22. Utilize the centrifugal force of the rotating spindle to ensure the lubricant evenly penetrates the graphite packing through the oil reservoir ring 7. Each injection should be 10 mL. Every 6 months, disassemble the sealing packing gland 8 to check the wear of the graphite packing. If the compression ratio is below 20%, replace the packing with new material.

[0071] This utility model is specifically adapted to 400mm×400mm pipes; it has a processing capacity of 6 tons / hour, a spindle speed of 1200rpm, a maintenance time of 1.5 hours, and reduces annual downtime losses by 800,000 yuan. The length of the hammer block spacer 15 is increased to 1.3 times, the crushing particle size is ≤5mm, and the sealing life is maintained for 6 months.

[0072] This invention achieves "online maintenance" through the design of inspection hole 24, detachable cover plate 23, hammer block fixing rod replacement hole 2, and replacement hole cover 3, avoiding the need for traditional whole machine disassembly. The oil reservoir ring 7 and oil injection hole 22 work together to form a continuous lubrication environment, extending the service life of graphite packing to over 800 hours; leakage is almost zero. The symmetrical distribution and clearance fit design of the hammer blocks are suitable for high-speed working conditions, with a crushing particle size ≤5mm, greatly reducing the pipeline blockage rate.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0074] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A tin fume dust agglomeration and breakup device for pipelines that requires no complete disassembly or maintenance, characterized in that, include: The split housing includes a detachable first housing (1) and a second housing (14). After the first housing (1) and the second housing (14) are connected, a crushing space is formed inside. The crushing space is provided with an inspection hole (24) and a detachable cover plate (23) on its side. The main shaft assembly includes a main shaft (10) that passes through the crushing space, double-row self-aligning ball bearings and bearing seats symmetrically installed at both ends of the main shaft (10). The hammer assembly includes at least two hammer fixing rod connecting discs (4) that are spaced apart along the axial direction of the main shaft (10), a plurality of pluggable hammer fixing rods (5), and a plurality of hammers (16) that are clearance-fitted on the hammer fixing rods (5). The hammers (16) are symmetrically distributed through hammer spacers (15) to achieve dynamic balance. The contact surface between the first housing (1) and the second housing (14) is statically sealed, and the sealing points between the main shaft (10) and both ends of the crushing space are dynamically sealed.

2. The tin fume dust pipeline agglomeration and crushing device according to claim 1, characterized in that, The inspection hole (24) is provided on both sides of the first housing (1) and / or the second housing (14), and the removable cover plate (23) is sealed and removable at the inspection hole (24), and allows multiple hammers (16) to be removed when disassembled.

3. The tin fume dust pipeline agglomeration and crushing device according to claim 1, characterized in that, The hammer block fixing rod connecting plate (4) is connected to the main shaft (10) by a symmetrical flat key. Adjacent hammer block fixing rod connecting plates (4) are axially positioned by a connecting plate spacer (17) and fixed to the main shaft (10) by a locking nut (21).

4. The tin fume dust pipeline agglomeration and crushing device according to claim 1, characterized in that, The two ends of the hammer block fixing rod (5) extend out of the hammer block fixing rod connecting plate (4) and are connected by threaded fasteners. The clearance fit between the hammer block (16) and the hammer block fixing rod (5) is 0.5-1.5mm.

5. A tin fume dust pipeline agglomeration and crushing device that requires no complete disassembly and maintenance, as described in claim 1, is characterized in that... The hammer block fixing rod connecting plate (4) has four mounting holes evenly distributed in the circumferential direction. Each mounting hole corresponds to the installation of a hammer block fixing rod (5). At least two hammer blocks (16) are symmetrically arranged on the hammer block fixing rod (5). Adjacent hammer blocks (16) are separated by hammer block spacers (15). The length of the hammer block spacers (15) is 1.1-1.3 times the width of the hammer blocks (16).

6. A tin fume dust pipeline agglomeration and crushing device that requires no complete disassembly and maintenance, as described in claim 5, is characterized in that... The first housing (1) and / or the second housing (14) are provided with hammer block fixing rod replacement holes (2) on both sides along the length direction of the main shaft (10), and the hammer block fixing rod replacement holes (2) are provided with detachable replacement hole covers (3).

7. A tin fume dust pipeline agglomeration and crushing device that requires no complete disassembly and maintenance, as described in claim 1, is characterized in that... The first housing (1) and / or the second housing (14) have a base (13) for mounting bearing seats.

8. The tin fume pipeline agglomeration and crushing device according to claim 1, characterized in that, The dynamic seal adopts a sealing lubrication assembly, which includes two sealing packing seats (6) coupled to the main shaft (10) and both sides of the crushing space. Each sealing packing seat (6) has an oil reservoir ring (7) sleeved on the main shaft (10). The oil reservoir ring (7) is sandwiched between two sets of graphite packings, and its outer circumference is clearance-fitted with the sealing packing seat (6). Lubricant is injected through the oil injection hole (22) on the sealing packing seat (6) to form continuous lubrication.

9. A tin fume dust pipeline agglomeration and crushing device that requires no complete disassembly and maintenance, as described in claim 8, is characterized in that... The oil storage ring (7) has an annular groove structure with radial oil outlet holes evenly distributed in the groove. The radial clearance between the oil storage ring (7) and the sealing packing seat (6) is 0.3-0.8 mm, and the radial clearance between the oil storage ring (7) and the main shaft (10) is 3-8 mm.

10. A tin fume duct agglomeration crushing device that requires no complete disassembly and maintenance, as described in claim 1, is characterized in that... The rotational speed of the main shaft (10) is ≥1200rpm, the dynamic balance error of the symmetrical distribution of the hammer blocks (16) is ≤0.1mm, and the particle size of the dust after crushing is ≤5mm.

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