Sludge pump cylinder barrel polishing device

Abstract

The invention relates to the technical field of cylinder barrel polishing, in particular to a sludge pump cylinder barrel polishing device which comprises an operation table and a placement frame fixedly installed on the operation table. The fixing station and the polishing station are slidably mounted on the operation table on the two sides of the placement frame; according to the sludge pump cylinder barrel polishing device, by arranging the fixing station, transverse pushing and aligning of sludge pump cylinder barrels on the horizontal plane are achieved, it is guaranteed that the axis of the sludge pump cylinder barrels is precisely and coaxially aligned with the rotation axis of a subsequent polishing station, and a foundation is laid for high-precision polishing; and by means of a connecting rod transmission mechanism, linear movement of the push plate is converted into sliding of the sliding block, so that the clamping jaw tightly clamps the periphery of the cylinder barrel, grinding vibration and deviation are effectively restrained, and absolute stability of the cylinder barrel in the inner wall grinding operation is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cylinder polishing, in particular to a sludge pump cylinder polishing device. BACKGROUND

[0002] As the core equipment for conveying high-viscosity and high-concentration sludge, sludge pumps are widely used in fields such as sewage treatment, chemical industry, mining and agricultural drainage. The core component of the sludge pump, the cylinder, is the main structure that bears hydraulic pressure, directly determining the service life and reliability of the pump.

[0003] The polishing process of the sludge pump cylinder is a key link to improve its performance and service life: on the one hand, by reducing the surface roughness (Ra value from 6.3 μm to below 0.8 μm), the embedding depth of hard particles (such as SiO2, Al2O3) in sludge can be significantly reduced, and the "three-body abrasive wear" can be inhibited, so that the service life of the cylinder liner in the slurry containing 20% of sand can be extended by 3 times; on the other hand, polishing can eliminate defects such as pores and cracks caused by casting or heat treatment, close the surface micro-cracks, prevent fatigue failure caused by stress concentration, and at the same time improve the coaxiality accuracy of the bimetallic cylinder liner (error ≤0.05 mm), avoiding local overheating (temperature up to 200℃ or more) caused by running eccentricity.

[0004] When polishing the inner wall of the cylinder by traditional manual method, dead angles are easily produced due to the limitation of the complex inner cavity structure, and uneven force application leads to local roughness difference or excessive thinning, causing the sealing gap deviation to exceed the standard.

[0005] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. SUMMARY

[0006] The present application aims to provide a sludge pump cylinder polishing device which can effectively solve the above technical problems.

[0007] In order to achieve the purpose of the present application, the following technical solutions are adopted: A sludge pump cylinder polishing device, comprising: an operation table, a placing rack fixedly installed on the operation table; a fixed station and a polishing station slidingly installed on the operation table on both sides of the placing rack; The fixed station comprises: a mounting rack slidingly installed on the operation table, a gas cylinder one fixedly installed on the mounting rack, a push plate one fixedly connected with the piston rod of the gas cylinder one, a hinged rod hingedly connected with the push plate one, a sliding block hingedly connected with the other end of the hinged rod, and a clamping jaw fixedly installed on the sliding block; the sliding block is slidingly installed on the mounting rack.

[0008] Further, the mounting rack is a Y-shaped mounting rack; the sliding block is slidingly installed on the inclined edge of the Y-shaped mounting rack.

[0009] Further, the operation table is further provided with a driving assembly for driving the fixed station and the polishing station to move towards each other. The driving assembly comprises a threaded rod rotatably installed on the operation table, two opposite threads provided on the threaded rod, the fixed station and the polishing station threadedly connected to the two opposite threads of the threaded rod, and a motor one for driving the threaded rod to rotate.

[0010] Further, the polishing station comprises a fixed frame slidably installed on the installation operation table, a second push plate rotatably installed on the fixed frame, an inner cylinder fixedly installed on the second push plate, a straight hole provided on the inner cylinder, a polishing piece inserted into the straight hole, a pushing assembly for pushing the polishing piece to be close to the inner wall of the sludge pump cylinder, and a motor two for driving the second push plate to rotate.

[0011] Further, the pushing assembly comprises a push rod sleeved in the inner cylinder and a cylinder two for driving the push rod to move in the inner cylinder.

[0012] Further, the push rod is composed of a conical block and a connecting rod.

[0013] Further, a plurality of groups of the straight hole and the polishing piece are equidistantly arranged along the axis of the inner cylinder.

[0014] Further, the polishing piece comprises a top block, a cavity provided in the top block, a partition plate slidably installed in the cavity, sand filled in the cavity, a top rod fixedly installed on the partition plate, and a spring two provided between the partition plate and the inner cavity.

[0015] Further, the partition plate is further provided with a cold column.

[0016] Compared with the prior art, the present application has the following beneficial effects: The sludge pump cylinder polishing device of the present application realizes the horizontal transverse alignment of the sludge pump cylinder in the horizontal plane, ensures the coaxial alignment of the axis and the rotating axis of the subsequent polishing station, lays a foundation for high-precision polishing, and converts the linear motion of the push plate into the sliding of the sliding block by means of the connecting rod transmission mechanism, so as to tightly clamp the outer periphery of the cylinder with the clamping jaw, effectively suppresses the polishing vibration and deviation, and ensures the absolute stability of the cylinder in the inner wall polishing operation. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the present application, and do not constitute a limitation on the present application.

[0018] Figure 1It is a structure schematic view of a sludge pump cylinder polishing device of the present application; Figure 2 It is a side view of a sludge pump cylinder polishing device of the present application; Figure 3 It is a structure schematic view of a fixed station in the present application; Figure 4 It is a partial exploded view of a fixed station in the present application; Figure 5 It is a structure schematic view of a polishing station in the present application; Figure 6 It is a semi-sectional view of a polishing station in the present application; Figure 7 It is a sectional view of a polishing station in the present application; Figure 8 It is Figure 7 It is a local enlarged view of part A in the present application.

[0019] In the figure: 1, operation table; 2, placing rack; 3, fixed station; 4, polishing station; 31, mounting rack; 32, cylinder one; 33, push plate one; 34, hinged rod; 35, sliding block; 36, claw; 37, driving assembly; 371, threaded rod; 372, thread; 373, motor one; 41, fixed frame; 42, push plate two; 43, inner cylinder; 44, straight hole; 45, polishing piece; 47, motor two; 48, spring one; 461, push rod; 462, cylinder two; 4611, conical block; 4612, connecting rod; 451, top block; 452, cavity; 453, partition; 454, sandstone; 455, top rod; 456, spring two; 457, flexible wrapping layer; 458, polishing sandpaper; 459, cold column. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the technical scheme in the embodiments of the present application to make a clear and complete description, obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments.

[0021] In the description of this invention, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation on the scope of protection of this invention. When a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intermediate component at the same time. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0022] like Figures 1 to 8 As shown, the present invention provides a sludge pump cylinder grinding device, comprising: an operating table 1, a placement frame 2 fixedly installed on the operating table 1; a fixed work station 3 and a grinding work station 4 slidably installed on the operating table 1 on both sides of the placement frame 2; When the sludge pump cylinder needs to be polished, the staff only needs to place the sludge pump cylinder to be polished on the placement rack 2. The fixed station 3 will fix the sludge pump cylinder placed on the placement rack 2 in the correct position. Then, the polishing station 4 will polish the inner wall of the fixed sludge pump cylinder. This can significantly improve the overall automation level of the equipment, minimize manual intervention, and thus effectively ensure the stability and consistency of product quality.

[0023] The fixed workstation 3 includes: a mounting frame 31 slidably mounted on the operating table 1, a cylinder 32 fixedly mounted on the mounting frame 31, a push plate 33 fixedly connected to the piston rod of the cylinder 32, a hinge rod 34 hinged to the push plate 33, a slider 35 hinged to the other end of the hinge rod 34, and a claw 36 fixedly mounted on the slider 35; the slider 35 is slidably mounted on the mounting frame 31.

[0024] The mounting bracket 31 is a Y-shaped mounting bracket 31; the slider 35 is slidably mounted on the inclined side of the Y-shaped mounting bracket 31.

[0025] Once the sludge pump cylinder to be ground is placed in the designated position on the placement frame 2, cylinder 32 is activated. At this time, cylinder 32 outputs linear motion, pushing the push plate 33 connected to it to move horizontally toward the sludge pump cylinder to be ground until the push plate 33 is in close contact with the outer wall of the sludge pump cylinder and an appropriate thrust is applied. This achieves the lateral alignment of the sludge pump cylinder in the horizontal plane, ensuring that the axis of the sludge pump cylinder to be ground is precisely coaxially aligned with the rotation axis of the subsequent grinding station 4, laying the foundation for subsequent high-precision grinding operations.

[0026] Furthermore, during the movement of the push plate 33 driven by cylinder 32, the linear motion of the push plate 33 is synchronously converted into the traction motion of the hinge rod 34 through the linkage transmission mechanism formed by the push plate 33 and the hinge rod 34. The hinge rod 34 then pulls the slider 35, which is hinged to it, so that it slides smoothly along the linear guide rail preset on the mounting frame 31 towards the axis of the sludge pump cylinder. As the slider 35 continues to move, the grippers installed on the slider 35 gradually approach the sludge pump cylinder until the gripping surface of the grippers is tightly attached to the outer surface of the sludge pump cylinder. The mechanical clamping force fixes the outer periphery of the sludge pump cylinder, effectively suppressing the vibration and displacement caused by the cutting force during the grinding process, and ensuring the absolute stability of the sludge pump cylinder during the inner wall grinding operation.

[0027] It should be noted that the grippers adopt a symmetrical layout design, with two sets located on both sides of the sludge pump cylinder. Through the coordinated clamping action of the two sets of grippers, the sludge pump cylinder can be evenly fixed under stress, avoiding stress concentration and uneven load distribution caused by unilateral clamping. This significantly improves the structural stability and operational reliability of the entire positioning and fixing device, providing strong support for high-precision, high-quality grinding operations on the inner wall of the sludge pump cylinder.

[0028] The operating table 1 is also equipped with a drive assembly 37 that drives the fixed station 3 and the grinding station 4 to move in opposite directions. The drive assembly 37 includes: a threaded rod 371 rotatably mounted on the operating table 1; the threaded rod 371 is provided with two opposite threads 372; the fixed station 3 and the grinding station 4 are respectively threaded 372 connected to the two opposite threads 372 of the threaded rod 371; and a motor 373 that drives the threaded rod 371 to rotate.

[0029] Before the inner wall grinding operation of the sludge pump cylinder is carried out, the drive motor 373 (as a power source) starts to run. Its output shaft is rigidly connected to the threaded rod 371 through a coupling, and transmits the rotational torque to the threaded rod 371, driving the threaded rod 371 to rotate around its own axis.

[0030] As the threaded rod 371 rotates, relying on the transmission effect of the threaded rod 372, the fixed station slide 3 and the grinding station slide 4, which form a helical transmission cooperation with the threaded rod 371, move in opposite directions in a straight line along the axial direction of the sludge pump cylinder under the guidance and constraint of the guide rail. Specifically, the fixed station slide 3 and the grinding station slide 4 move synchronously from both sides of the sludge pump cylinder towards the center until the positioning and clamping mechanism on the fixed station slide 3 contacts the outer wall of the sludge pump cylinder and completes precise positioning and reliable clamping. At the same time, the grinding execution mechanism on the grinding station slide 4 reaches the preset grinding position, providing precise spatial positioning and stable working posture for the subsequent fixing process and inner wall grinding process, ensuring high precision and high reliability of the entire grinding process.

[0031] It should be added that the grinding station 4 is equipped with push block 2; when the motor 373 rotates, push block 2 on the grinding station 4 and push block 1 on the fixed station 3 clamp the sludge pump cylinder in the middle to improve the stability of the sludge pump cylinder.

[0032] The grinding station 4 includes: a fixed frame 41 slidably mounted on the mounting platform 1, a push plate 42 rotatably mounted on the fixed frame 41, an inner cylinder 43 fixedly mounted on the push plate 42, a grinding component 45 inserted into a straight hole 44 in the inner cylinder 43, a pushing assembly that pushes the grinding component 45 close to the inner wall of the sludge pump cylinder, and a motor 47 that drives the push plate 42 to rotate; the grinding component 45 is elastically connected to the inner cylinder 43 by a spring 48.

[0033] The pushing assembly includes: a push rod 461 sleeved inside the inner cylinder 43, and a second cylinder 462 that drives the push rod 461 to move inside the inner cylinder 43; the piston rod of the second cylinder 462 is fixedly connected to the push rod 461.

[0034] After the motor 373 drives the fixed station 3 and the grinding station 4 to clamp the sludge pump cylinder between the two push plates, the inner cylinder 43 will be inserted into the sludge pump cylinder. At this time, the cylinder 462 pushes the push rod 461, forcing the grinding part 45 to overcome the preload of the elastic element and move radially outward along the outer cylindrical surface of the inner cylinder 43 until the working surface of the grinding part 45 is tightly attached to the inner wall of the sludge pump cylinder, forming a stable contact pressure, which provides the necessary mechanical conditions for efficient grinding.

[0035] After completing the radial positioning and contact pressure setting, motor 47 starts, driving the grinding part 45 to rotate at high speed. Under the combined action of the high-speed rotation and radial feed of the grinding part 45, the abrasive grains on the working surface of the grinding part 45 continuously and uniformly cut and grind the inner wall of the sludge pump cylinder, gradually removing the oxide layer, burrs and processing defects on the inner wall surface, and achieving high-precision and high-quality grinding treatment of the inner wall of the sludge pump cylinder.

[0036] The push rod 461 is composed of a conical block 4611 and a connecting rod 4612; the conical block 4611 can effectively push the grinding part 45 outward into the inner cylinder 43.

[0037] During a prolonged grinding process, the surface finish and grinding effect of the grinding part 45 will gradually decrease due to friction and wear over a long period of time, which will have a significant negative impact on the overall grinding efficiency.

[0038] Multiple sets of straight holes 44 and grinding parts 45 are equidistantly arranged along the axial direction of the inner cylinder 43. When the cylinder 462 performs a pushing action, driving the push rod 461 to move, the conical block 4611 at the end of the push rod 461 moves to different preset positions, thereby precisely pushing up the grinding parts 45 in the corresponding positions, making them gradually approach the surface of the sludge pump cylinder to be ground. By scientifically setting the multi-segment grinding part 45 structure layout, the workload of a single grinding part 45 can be effectively distributed, avoiding the problem of excessive wear caused by the long-term continuous use of a single grinding part 45, and significantly improving the stability and durability of the grinding operation.

[0039] Given the presence of various irregularly distributed depressions on the inner wall of the sludge pump cylinder, if only a rigid grinding process is used, it is difficult to achieve full fit and effective contact with the depression area due to the limitations of the geometry and movement trajectory of the rigid grinding tool. This results in the formation of grinding blind spots (or grinding dead angles) in the depression areas, which seriously affects the overall grinding quality and processing accuracy of the inner wall of the cylinder.

[0040] The grinding component 45 consists of a top block 451, a cavity 452 formed in the top block 451, a partition 453 slidably installed in the cavity 452, sand 454 filled in the cavity 452, a top rod 455 fixedly installed on the partition 453, and a spring 456 provided between the partition 453 and the inner cavity; a flexible wrapping layer 457 is provided on the top block 451; and sandpaper 458 is adhered to the outside of the wrapping layer.

[0041] When the grinding part 45 is pushed into the inner surface of the sludge pump cylinder, its push rod 461 will first push up the push rod 455, so that the push rod 455 is subjected to force and pushes the partition plate 453 to move in the direction of the sandpaper 458. During the movement of the partition plate 453, a uniform extrusion force is applied to the sand 454 medium in the sealed cavity 452, forcing the sand 454 to migrate in a direction through the flexible flow channel towards the flexible coating layer 457, and finally achieving full filling and deformation adaptation of the flexible coating layer 457.

[0042] This deformation mechanism allows the surface of the 458 sandpaper on the outer side of the coating to actively conform to the complex contour of the irregular cylindrical inner wall. Through elastic deformation, it eliminates the geometric limitations of traditional rigid sanding tools, significantly increasing the effective contact area and forming a fully covered sanding zone, completely eliminating sanding dead angles. Furthermore, the 454 abrasive medium, as a heat transfer medium, has excellent thermal conductivity. During sanding, it can construct efficient heat dissipation channels. Through the dual effects of microscopic heat convection and macroscopic heat conduction between the 454 abrasive particles, it achieves rapid diffusion and even distribution of sanding heat, effectively avoiding thermal damage caused by localized heat accumulation.

[0043] The partition 453 is also equipped with a cooling column 459; the cooling column 459 is made of a material with high thermal conductivity, and continuously delivers cooling energy to the sand 454 medium through a heat conduction mechanism, creating a local low-temperature environment. This design can significantly improve the overall heat dissipation efficiency of the system, effectively suppress the temperature rise in the sanding area, thereby extending the service life of the sandpaper 458 and reducing its replacement frequency due to thermal aging.

[0044] It should be noted that when the push rod 455 performs the reset action and drives the partition 453 to retract synchronously, the volume of the sealed cavity 452 expands, and the pressure inside the cavity decreases, creating a negative pressure environment. This pressure gradient drives the sand 454 medium to form an orderly flow within the cavity 452, and the sand 454 itself dissipates heat through forced convection heat transfer, forming a self-circulating heat dissipation system.

[0045] Furthermore, by configuring multiple independent grinding units to form a redundant grinding array, each unit can perform alternating operations according to a preset program. This layout not only effectively avoids the risk of single-point failure by distributing the workload, preventing processing interruptions caused by excessive wear or damage to a single grinding part 45; more importantly, each grinding unit can automatically activate the cooling function of the cooling column 459 during non-working cycles, utilizing the intermittent period to complete thermal balance adjustment, significantly reducing the core temperature of the grinding part 45. This thermal management strategy ensures that the grinding part 45 maintains the optimal operating temperature range in subsequent working conditions, greatly improving the material removal rate and processing accuracy stability per unit time.

[0046] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0047] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A sludge pump cylinder grinding device, characterized in that, include: Operating table and a shelf fixedly installed on the operating table; The fixed workstation and the grinding workstation are slidably installed on the operating tables on both sides of the placement frame; The fixed workstation includes: a mounting frame slidably mounted on the operating table, a cylinder 1 fixedly mounted on the mounting frame, a push plate 1 fixedly connected to the piston rod of the cylinder 1, a hinge rod hinged to the push plate 1, a slider hinged to the other end of the hinge rod, and a pawl fixedly mounted on the slider; the slider is slidably mounted on the mounting frame.

2. The sludge pump cylinder grinding device as described in claim 1, characterized in that, The mounting bracket is a Y-shaped mounting bracket; the slider is slidably mounted on the inclined side of the Y-shaped mounting bracket.

3. The sludge pump cylinder grinding device as described in claim 2, characterized in that, The operating platform is also equipped with a drive assembly that drives the fixed station and the grinding station to move in opposite directions. The drive assembly includes: a threaded rod rotatably mounted on the operating table; the threaded rod having two opposite threads; the fixed station and the grinding station being threadedly connected to the two opposite threads of the threaded rod respectively; and a motor for driving the threaded rod to rotate.

4. The sludge pump cylinder grinding device as described in claim 1, characterized in that, The grinding station includes: a fixed frame slidably mounted on the installation platform, a push plate II rotatably mounted on the fixed frame, an inner cylinder fixedly mounted on the push plate II, a straight hole opened on the inner cylinder, a grinding component inserted into the straight hole, a pushing assembly that pushes the grinding component close to the inner wall of the sludge pump cylinder, and a motor II that drives the push plate II to rotate; the grinding component is elastically connected to the inner cylinder by a spring I.

5. The sludge pump cylinder grinding device as described in claim 4, characterized in that, The pushing assembly includes: a push rod sleeved inside the inner cylinder, and a second cylinder that drives the push rod to move inside the inner cylinder; the piston rod of the second cylinder is fixedly connected to the push rod.

6. The sludge pump cylinder grinding device as described in claim 5, characterized in that, The push rod consists of a conical block and a connecting rod.

7. The sludge pump cylinder grinding device as described in claim 6, characterized in that, The straight holes and grinding parts are provided in multiple sets at equal intervals along the axial direction of the inner cylinder.

8. The sludge pump cylinder grinding device as described in claim 7, characterized in that, The grinding component comprises a top block, a cavity formed within the top block, a partition slidably installed within the cavity, sand and gravel filled within the cavity, a top rod fixedly installed on the partition, and a spring provided between the partition and the inner cavity; a flexible wrapping layer is provided on the top block; and sandpaper is adhered to the outer side of the wrapping layer.

9. The sludge pump cylinder grinding device as described in claim 8, characterized in that, The partition is also equipped with a cooling column.

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