A pressure stabilizing device based on the hydraulic pipeline of the grinding roller

Abstract

This utility model relates to the field of hydraulic system technology, and in particular to a pressure stabilizing device based on a grinding roller hydraulic pipeline. The pressure stabilizing device includes a distribution component connected to the grinding roller cylinder, and also includes several pressure stabilizing components connected to the distribution component. The pressure stabilizing components are also connected to the oil inlet pipeline of the grinding roller. Each pressure stabilizing component includes a pressure stabilizing tank, within which a pressure stabilizing airbag is disposed. Several constraint components are disposed around the outer periphery of the pressure stabilizing airbag, axially dividing the pressure stabilizing airbag into several pressure stabilizing intervals. By dividing the pressure stabilizing airbag into multiple independent small-volume pressure stabilizing intervals through the constraint components, each interval undergoes only localized limited deformation during pressure fluctuations, significantly reducing the overall stretching / wrinkling degree of the airbag and avoiding stress concentration. This solves the problem of pressure stabilization failure caused by frequent pressure impacts on the airbag components within the pressure stabilizing component, effectively extending the airbag life and improving the system's pressure stabilization accuracy.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic system technology, and in particular to a pressure stabilizing device based on a grinding roller hydraulic pipeline. Background Technology

[0002] During the operation of a vertical mill, the hydraulic system of the grinding rollers is a crucial element in maintaining stable grinding operations. This system applies and maintains the required pressure on the grinding rollers through hydraulic cylinders to adapt to changes in the material layer.

[0003] However, in actual production, especially when the material layer thickness fluctuates significantly, the working pressure of the hydraulic system will change significantly. This pressure fluctuation will cause the grinding roller to operate unstably, leading to roller vibration. To overcome the above-mentioned pressure fluctuation problem, the technical solution commonly used in the hydraulic system of vertical mill grinding rollers is to install a nitrogen accumulator as a pressure buffer device on the pipeline where the hydraulic oil enters the grinding roller.

[0004] However, in actual operation, especially under conditions of large and frequent fluctuations in the material layer, it still has significant limitations. Specifically, when the material layer fluctuates violently, the buffer capacity and response speed of the existing accumulator may not be sufficient to completely absorb or release the sudden surge of large-flow hydraulic oil, resulting in significant fluctuations in the system's working pressure. This continuous pressure fluctuation not only causes unstable operation and increased vibration of the grinding rollers, but also forces the main oil pump of the hydraulic station to frequently start and stop in an attempt to compensate for pressure loss or release excessive pressure. The frequent start and stop of the oil pump and the repeated violent vibration of the oil pipes during pressurization and depressurization not only increase the energy consumption and wear of the equipment, but also, with long-term operation, are more likely to lead to loose pipe connections, seal failure, and even damage to key hydraulic components, seriously affecting the operational stability, reliability, and service life of the vertical mill equipment.

[0005] Therefore, there is an urgent need for a more efficient, stable and reliable hydraulic pipeline pressure stabilization device for grinding rollers to cope with the pressure shock problem under extreme working conditions. Utility Model Content

[0006] The main purpose of this invention is to provide a pressure stabilizing device based on the hydraulic pipeline of the grinding roller, which aims to solve the problem that the pressure stabilizing component is prone to failure due to frequent pressure impacts on the airbag component inside the pressure stabilizing component under extreme working conditions.

[0007] To achieve the above objectives, this utility model provides a pressure stabilizing device based on the hydraulic pipeline of a grinding roller. The pressure stabilizing device includes a distribution component connected to the grinding roller cylinder, and further includes a plurality of pressure stabilizing components connected to the distribution component. The pressure stabilizing components are also connected to the oil inlet pipeline of the grinding roller.

[0008] The pressure stabilizing component includes a pressure stabilizing tank, which contains a pressure stabilizing airbag. Several constraint components are arranged around the outer periphery of the pressure stabilizing airbag, axially dividing it into several pressure stabilizing zones. When the hydraulic line pressure increases, the pressure stabilizing space of the pressure stabilizing airbag is compressed sequentially from bottom to top; when the hydraulic line pressure decreases, the pressure stabilizing space of the pressure stabilizing airbag is reset to maintain the hydraulic management pressure.

[0009] Optionally, the constraint component includes a plastic collar.

[0010] Optionally, the pressure-stabilizing airbag is provided with an elastic component, and the two ends of the elastic component are respectively fixedly connected to the upper and lower ends of the pressure-stabilizing airbag.

[0011] Optionally, the elastic component includes a telescopic rod and a spring sleeved on the outer periphery of the telescopic rod.

[0012] Optionally, the constraint assembly includes an upper constraint seat and a lower constraint seat rotatably disposed on the inner wall of the pressure stabilizing tank, wherein the upper constraint seat and the lower constraint seat have a through hole at their center, and the pressure stabilizing airbag is disposed in the through hole.

[0013] Optionally, the upper constraint seat and the lower constraint seat are rotatably configured, and a spring groove is provided on the end face of the upper constraint seat or the lower constraint seat, and a spring is provided in the spring groove.

[0014] Optionally, a plurality of constraint plates are further provided between the upper constraint seat and the lower constraint seat, and one side of the plurality of constraint plates is spliced ​​together in the through hole to form a constraint collar, and the pressure stabilizing airbag is disposed in the constraint collar.

[0015] Optionally, the upper constraint seat is provided with a plurality of guide grooves, the lower constraint seat is provided with a limiting groove, and the upper and lower end faces of the constraint piece are provided with protrusions, which respectively cooperate with the guide grooves and the limiting grooves.

[0016] Optionally, some of the guide grooves are arranged at an angle and the number of guide grooves matches the number of constraint pieces.

[0017] Optionally, a microbial valve is provided on the side of the pressure stabilizing tank near the distributor.

[0018] This invention proposes a pressure stabilizing device based on a grinding roller hydraulic pipeline. Through a constraint component, the pressure stabilizing airbag is divided into multiple independent small-volume pressure stabilizing intervals. Each interval undergoes only limited local deformation during pressure fluctuations, significantly reducing the overall stretching / wrinkling of the airbag and avoiding stress concentration. Simultaneously, the constraint component restricts the radial expansion of the pressure stabilizing airbag, concentrating its deformation in axial elastic expansion and contraction, thus reducing the risk of material fatigue. The compartmentalized design also achieves gradual attenuation of pressure fluctuations. Each interval absorbs pressure pulsation energy of different frequencies through a throttling effect, resulting in a more stable overall pressure output. This reduces the risk of pressure stabilization failure due to frequent pressure impacts on the airbag component within the pressure stabilizing assembly, effectively extending the airbag's lifespan and improving the system's pressure stabilization accuracy. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the voltage stabilizing component in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the voltage regulator component in an embodiment of this utility model;

[0022] Figure 4 For the present utility model Figure 3 A magnified structural diagram of A in the middle;

[0023] Figure 5 This is a schematic diagram showing the cooperation relationship between the pressure-stabilizing airbag and the restraint component in an embodiment of this utility model;

[0024] Figure 6 This is a schematic diagram of the constraint component in an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of the structure of the constraint base and constraint piece in an embodiment of this utility model;

[0026] Figure 8 This is a schematic diagram of the structure of the constraint seat and constraint piece in an embodiment of this utility model.

[0027] Figure label:

[0028] 1-Distribution component, 2-Pressure stabilizing component, 3-Oil inlet pipeline, 4-Bacterial valve;

[0029] 21-Pressure stabilizing tank, 22-Pressure stabilizing airbag, 23-Constraint assembly, 24-Pressure stabilizing space, 25-Elastic assembly;

[0030] 231-Constraint upper seat, 232-Constraint lower seat, 233-Through hole, 234-Spring groove, 235-Constraint piece, 236-Guide groove, 237-Limiting groove, 238-Protrusion;

[0031] 251-Telescopic rod, 252-Spring component.

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0037] Example 1:

[0038] Please refer to the attached document as well. Figures 1 to 8 This embodiment provides a pressure stabilizing device based on the hydraulic pipeline of the grinding roller. The pressure stabilizing device includes a distribution component 1 connected to the grinding roller cylinder, and also includes a plurality of pressure stabilizing components 2 connected to the distribution component 1. The pressure stabilizing components 2 are also connected to the oil inlet pipeline 3 of the grinding roller.

[0039] The pressure stabilizing component 2 includes a pressure stabilizing tank 21, within which a pressure stabilizing airbag 22 is disposed. A plurality of constraint components 23 are disposed around the outer periphery of the pressure stabilizing airbag 22, axially dividing the pressure stabilizing airbag 22 into several pressure stabilizing intervals. When the hydraulic pipeline pressure increases, the pressure stabilizing space 24 of the pressure stabilizing airbag 22 is compressed sequentially from bottom to top; when the hydraulic pipeline pressure decreases, the pressure stabilizing space 24 of the pressure stabilizing airbag 22 is reset to maintain the hydraulic management pressure.

[0040] It should be noted that the continuous pressure fluctuations in the existing grinding roller hydraulic pipeline not only cause unstable operation and increased vibration of the grinding roller, but also force the main oil pump of the hydraulic oil station to frequently start and stop in an attempt to compensate for pressure loss or release excessive pressure. Based on this, accumulators are often connected to the hydraulic pipeline. Commonly used accumulator structures include piston type, diaphragm type, and pneumatic type, each with its own advantages and disadvantages. For the pneumatic accumulator pressure stabilizing component 2, it relies on the compression recovery capability of the pneumatic bladder. Under continuous pressure fluctuations, the pneumatic bladder material suffers fatigue damage, and microcracks easily appear and gradually propagate in localized stress concentration areas, eventually leading to pneumatic bladder rupture or seal failure. Simultaneously, pressure fluctuations exacerbate the nonlinear deformation of the pneumatic bladder, causing excessive stretching in the high-pressure area and wrinkling and wear in the low-pressure area, shortening its service life. Furthermore, frequent pressure oscillations can cause heat accumulation at the gas-hydraulic oil interface, accelerating pneumatic bladder aging and reducing pressure stabilization response accuracy, ultimately affecting system stability and safety.

[0041] It should also be noted that, based on the above problems, this embodiment provides a pressure stabilizing device based on the hydraulic pipeline of the grinding roller. The pressure stabilizing airbag 22 is divided into multiple independent small-volume pressure stabilizing intervals by the constraint component 23. Each interval undergoes only local limited deformation during pressure fluctuations, which greatly reduces the overall stretching / wrinkling degree of the airbag and avoids stress concentration. At the same time, the constraint component 23 restricts the radial expansion of the pressure stabilizing airbag 22, which causes its deformation to be concentrated in axial elastic expansion and contraction, reducing the risk of material fatigue. The chamber design also realizes the gradual attenuation of pressure fluctuations. Each interval absorbs the pressure pulsation energy of different frequency bands through the throttling effect, making the overall pressure output more stable, thereby extending the life of the airbag and improving the system's pressure stabilization accuracy.

[0042] In this embodiment, the constraint component 23 includes a plastic collar. The flexible layer on the inner wall of the collar instantly adheres to the airbag as it contracts, absorbing local impact kinetic energy through the viscoelastic deformation of the molecular chains, thus avoiding stress concentration caused by airbag wrinkles. In addition, the change in the inner diameter of the plastic collar within the pressure-stabilizing airbag 22 guides the hydraulic oil to form micro-turbulence, converting the frictional heat generated by the airbag deformation into fluid kinetic energy, thereby reducing the interface temperature rise and significantly delaying material aging.

[0043] In some embodiments, the plastic ferrule is preferably made of thermoplastic polyurethane or a rubber-metal composite layer.

[0044] In some embodiments, the allocation component 1 is preferably an allocator.

[0045] Example 2:

[0046] In this embodiment, an elastic component 25 is provided inside the pressure-stabilizing airbag 22, and the two ends of the elastic component 25 are fixedly connected to the upper and lower ends of the pressure-stabilizing airbag 22, respectively.

[0047] In this embodiment, the elastic component 25 includes a telescopic rod 251 and a spring member 252 sleeved on the outer periphery of the telescopic rod 251.

[0048] For the elastic component 25, when the system pressure suddenly increases, the high-pressure fluid in the hydraulic line pushes the wall of the pressure-stabilizing airbag 22 to compress inward. At this time, the telescopic rod 251 first provides axial rigid guidance through its multi-stage sliding sleeve structure, forcing the airbag to contract directionally along the central axis, avoiding the disorderly expansion of the airbag towards weak parts in traditional structures. At the same time, during the compression process, the tightly wound end of the spring 252 deforms first due to its local high stiffness, generating initial damping and absorbing impact kinetic energy. As the pressure continues to increase, the spring 252 further dissipates energy and evenly transfers the remaining load to the radial support ribs of the telescopic rod 251, so that the wall of the pressure-stabilizing airbag 22 forms a radial tensile field with the center as the origin, eliminating most of the stress concentration. When the pressure suddenly drops, the restoring characteristics of the spring 252 generate elastic recoil force. When the end of the telescopic rod 251 is compressed, a groove is formed in the pipeline. When the groove moves axially, it induces the hydraulic oil to form a vortex barrier, which converts the pressure pulsation energy into controllable turbulent dissipation, thereby reducing the amplitude of the output pressure fluctuation. It is understood that the setting of the elastic component 25 can increase the threshold of the contraction and recovery capability of the pressure stabilizing component 2, which helps to improve its pressure stabilizing capability.

[0049] Example 3:

[0050] In this embodiment, the constraint assembly 23 includes an upper constraint seat 231 and a lower constraint seat 232 rotatably disposed on the inner wall of the pressure stabilizing tank 21. The upper constraint seat 231 and the lower constraint seat 232 are provided with a through hole 233 at their center, and the pressure stabilizing airbag 22 is disposed in the through hole 233.

[0051] Unlike the plastic collar structure used in the constraint component 23 in Embodiment 1, since the pressure stabilizing airbag 22 is filled with pressure stabilizing gases such as nitrogen, the plastic collar can constrain the contraction / recovery process of the pressure stabilizing airbag 22. However, since the plastic collar has problems of non-uniform compression or local lag in the actual constraint process, this embodiment optimizes and improves the constraint component 23. The plastic collar structure is improved into a fixed constraint structure, namely, the upper constraint seat 231 and the lower constraint seat 232. The pressure stabilizing airbag 22 is set in the through hole 233 to replace the plastic constraint of the plastic collar. Specifically, the annular guide ridge at the bottom of the upper constraint seat 231 causes the hydraulic oil to form an axial swirling flow, converting the pressure pulsation energy into laminar flow dissipation. Similarly, it also reduces the risk of deformation runaway caused by long-term creep of the plastic collar.

[0052] In this embodiment, the upper constraint seat 231 and the lower constraint seat 232 are rotatably configured, and a spring groove 234 is provided on the end face of the upper constraint seat 231 or the lower constraint seat 232, and a spring is provided in the spring groove 234.

[0053] It is understandable that when pressure fluctuations cause the pressure-stabilizing airbag 22 to expand radially, the upper constraint seat 231 and the lower constraint seat 232, which are in contact with the outer periphery of the pressure-stabilizing airbag 22, tend to rotate. During this process, the rotational torque is transmitted coaxially to the spring groove 234 at the bottom of the upper constraint seat 231, so that the spring is wound up to store deformation energy. At the same time, the centrifugal force field generated by the rotation reduces the rigid friction between the pressure-stabilizing airbag 22 and the constraint assembly 23.

[0054] In this embodiment, a plurality of constraint pieces 235 are provided between the upper constraint seat 231 and the lower constraint seat 232. One side of the plurality of constraint pieces 235 is spliced ​​together in the through hole 233 to form a constraint collar, and the pressure stabilizing airbag 22 is disposed in the constraint collar.

[0055] In this embodiment, the upper constraint seat 231 is provided with a plurality of guide grooves 236, the lower constraint seat 232 is provided with a limiting groove 237, and the upper and lower end faces of the constraint piece 235 are provided with protrusions 238, which cooperate with the guide grooves 236 and the limiting grooves 237 respectively.

[0056] Understandably, the dynamic variable-diameter constraint ring formed by splicing constraint pieces 235 overcomes the defects of traditional integral plastic rings, such as uncontrollable deformation and uneven stress distribution under severe pressure fluctuations, through a mechanical linkage mechanism. Specifically, when high-pressure fluid rushes into the airbag, the airbag expands radially, pushing the constraint pieces 235 to slide synchronously along the spiral guide groove 236 of the upper constraint seat 231. At this time, the sides of the constraint pieces 235 are spliced ​​into a constraint ring with a continuously increasing diameter in the through hole 233. This process forces all constraint pieces 235 to expand outward at a completely consistent displacement rate by the rigid blocking of the bottom protrusion 238 of the constraint pieces 235 by the limiting groove 237 of the lower constraint seat 232, so that the airbag can achieve uniform tensile deformation. When the pressure drops suddenly, the working process is the opposite of the above.

[0057] In this embodiment, a plurality of the guide grooves 236 are inclined and the number of guide grooves 236 matches the number of constraint pieces 235.

[0058] When the hydraulic line pressure rises suddenly, the pressure-stabilizing airbag 22 expands radially, pushing each constraint piece 235 to slide synchronously along the inclined guide groove 236 of the upper constraint seat 231. Since the inclination angle of the guide groove 236 is consistent and the number corresponds one-to-one with the constraint pieces 235, and with the rigid blocking of the bottom protrusion 238 of the constraint piece 235 by the limiting groove 237 of the lower constraint seat 232, all constraint pieces 235 are forced to expand radially outward at the same displacement rate, so that the diameter of the constraint collar formed by splicing is uniformly increased, thereby guiding the airbag to achieve synchronous and uniform radial tensile deformation, completely avoiding local stress concentration.

[0059] In this embodiment, a fungal valve 4 is installed on the side of the pressure stabilizing tank 21 near the distributor. When the pressure in the grinding roller hydraulic pipeline suddenly drops due to a sudden increase in the material layer, a local low-pressure zone is easily formed at the distributor interface. If there is no effective protection, the upstream high-pressure oil may flow back through the pressure stabilizing component 2, which will not only violently impact the pressure stabilizing airbag 22, causing it to over-inflate or even tear, but also disrupt the pressure balance of the system. The fungal valve 4 actively intervenes in this process through its unique umbrella-shaped valve core structure—the valve core opens under fluid pressure in the normal oil flow direction, keeping the oil passage unobstructed; and when it detects that oil is attempting to flow back into the pressure stabilizing tank 21 from the distributor side, the valve core quickly closes under the combined action of reverse hydraulic pressure and the built-in return spring, forming a rigid sealing barrier and physically blocking the backflow path.

[0060] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A pressure stabilizing device based on a grinding roller hydraulic pipeline, characterized in that, The pressure stabilizing device includes a distribution component connected to the grinding roller cylinder, and the pressure stabilizing device also includes a plurality of pressure stabilizing components connected to the distribution component. The pressure stabilizing components are also connected to the oil inlet pipe of the grinding roller. The pressure stabilizing component includes a pressure stabilizing tank, which contains a pressure stabilizing airbag. Several constraint components are arranged around the outer periphery of the pressure stabilizing airbag, axially dividing it into several pressure stabilizing zones. When the hydraulic line pressure increases, the pressure stabilizing space of the pressure stabilizing airbag is compressed sequentially from bottom to top; when the hydraulic line pressure decreases, the pressure stabilizing space of the pressure stabilizing airbag is reset to maintain the hydraulic management pressure.

2. The hydraulic line pressure stabilizing device based on the grinding roller according to claim 1, characterized in that, The constraint component includes a plastic collar.

3. The hydraulic line pressure stabilizing device based on the grinding roller according to claim 1, characterized in that, The pressure-stabilizing airbag is equipped with an elastic component, and the two ends of the elastic component are fixedly connected to the upper and lower ends of the pressure-stabilizing airbag, respectively.

4. The hydraulic line pressure stabilizing device based on a grinding roller according to claim 3, characterized in that, The elastic component includes a telescopic rod and a spring sleeved on the outer periphery of the telescopic rod.

5. The hydraulic line pressure stabilizing device based on a grinding roller according to claim 1, characterized in that, The constraint assembly includes an upper constraint seat and a lower constraint seat rotatably disposed on the inner wall of the pressure stabilizing tank. The upper constraint seat and the lower constraint seat have a through hole at their center, and the pressure stabilizing airbag is disposed in the through hole.

6. A hydraulic line pressure stabilizing device for a grinding roller according to claim 5, wherein The upper and lower constraint seats are rotatably configured, and a spring groove is provided on the end face of the upper or lower constraint seat, with a spring-loaded spring installed in the spring groove.

7. The hydraulic line pressure stabilizing device based on a grinding roller according to claim 5, characterized in that, Several constraint plates are also provided between the upper constraint seat and the lower constraint seat. One side of the constraint plates is spliced ​​together in the through hole to form a constraint collar, and the pressure stabilizing airbag is disposed in the constraint collar.

8. The hydraulic line pressure stabilizing device based on a grinding roller according to claim 7, characterized in that, The upper constraint seat is provided with several guide grooves, the lower constraint seat is provided with limit grooves, and the upper and lower end faces of the constraint piece are provided with protrusions, which respectively cooperate with the guide grooves and limit grooves.

9. The hydraulic line pressure stabilizing device based on a grinding roller according to claim 8, characterized in that, Several of the guide grooves are inclined and the number of guide grooves matches the number of constraint pieces.

10. The hydraulic line pressure stabilizing device based on a grinding roller according to claim 1, characterized in that, A microbial valve is installed on the side of the pressure stabilizing tank near the distributor.

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