Isolator for hot ore pulp pipeline

Abstract

The utility model discloses an isolator for a hot ore pulp pipeline, relates to the technical field of conveying diaphragm pumps of the hot ore pulp pipeline, and aims to solve the problems that an existing isolator is prone to mechanical abrasion and poor in impact resistance due to the lack of elastic buffering. Wear-resistant sleeves are coaxially embedded in central assembly holes of the isolation sheets, a plurality of isolation sheets are arranged in parallel in the axial direction to form an isolation sheet group, flanges are arranged on the two axial sides of the isolation sheet group, the isolation sheet group and the flanges are arranged in a penetrating mode through screws and are matched with nuts to be locked into a whole, and flange cushions are bonded to the axial outer sides of the flanges through vulcanization. According to the utility model, the outer side of the flange is bonded with the flange cushion made of the fluororubber material through vulcanization, so that the impact force generated when the isolator reciprocates to the stop block along the pipeline guide rod can be buffered, the hard contact abrasion between the isolator and the stop block is reduced, and meanwhile, the contact abrasion between the isolator and guide equipment in the pipeline is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of diaphragm pumps for hot mineral slurry pipeline transportation, specifically an isolator used in hot mineral slurry pipelines. Background Technology

[0002] In hot slurry pipeline transportation systems in industries such as metallurgy and mining, isolators are key components for isolating hot slurry within the pipeline. They are typically mounted on a guide rod in the middle of the pipeline and can reciprocate along the guide rod. Stops are installed at both ends of the guide rod inside the pipeline to limit the movement of the isolator.

[0003] Existing isolators have several problems in practical use: First, the isolator is in direct contact with the guide equipment and guide rods inside the pipeline, and long-term reciprocating motion can easily cause severe mechanical wear, resulting in a decrease in the structural strength of the isolator and a significant reduction in its service life. Second, the isolator as a whole lacks an elastic buffer structure, and when the hot slurry flows in the pipeline, it will generate radial impact. The impact acts directly on the internal support structure of the isolator, which can easily cause damage to the support structure. At the same time, when the isolator moves along the guide rod to the stop position, the hard contact impact will further aggravate the equipment wear and reduce the operational stability of the entire slurry conveying system.

[0004] Patent document CN222977008U discloses a high-temperature isolator for a diaphragm pump. Its mounting sleeve and silicon carbide wear-resistant guide sleeve are rigid components in direct contact without an elastic buffer structure. Under the high impact and high scouring conditions of hot slurry pipelines, the rigid components are prone to severe wear, resulting in a short product service life (only about 40 days) and failing to meet the long-term stable operation requirements of hot slurry pipelines. At the same time, this structure is not optimized for high-temperature and highly corrosive conditions, and its corrosion resistance is insufficient in a strongly alkaline environment of 150℃ and pH=14, which has obvious technical defects.

[0005] To address the aforementioned issues, some related technologies have attempted to simply add a wear-resistant layer to the surface of the isolator. However, the wear-resistant layer has poor adhesion to the isolator and does not meet the requirements for buffering and impact resistance, failing to effectively absorb the forces of slurry impact and moving impacts. Other technologies use a single-material wear-resistant sleeve to reduce wear between the guide rod and the isolator, but the wear-resistant sleeve lacks elastic protection and is still prone to cracking and deformation due to impact, making it unsuitable for use with hot slurry conditions around 120°C. Therefore, there is an urgent need to design an isolator that combines wear resistance and elastic buffering functions, and is suitable for high-temperature conditions with hot slurry, to solve the problems of wear and poor impact resistance in existing equipment. Utility Model Content

[0006] To address the problems mentioned in the background art regarding the mechanical wear and poor impact resistance of existing isolators, this invention proposes an isolator for hot slurry pipelines. It utilizes the elastic deformation of the rubber sleeve to effectively absorb the radial impact generated by the slurry fluid, preventing damage to the internal support structure. Furthermore, through the design of multiple wear-resistant buffer structures, it reduces contact wear between the isolator and the guide rod / guide equipment, while simultaneously buffering the impact force between the isolator and the stop block, significantly extending the equipment's service life. It includes an isolation plate, in which a wear-resistant sleeve is coaxially embedded in the central mounting hole of the isolation plate. Several isolation plates are arranged side by side along the axial direction to form an isolation plate group. Flanges are provided on both sides of the isolation plate group along the axial direction. The isolation plate group and the flanges are connected by a threaded rod and locked together with a nut. A vulcanized and bonded flange buffer gasket is used on the outer side of the flange. A 1mm thick wear-resistant sleeve rubber sleeve is coaxially fitted on the outer wall of the wear-resistant sleeve rubber sleeve. A support assembly is installed on the outer wall of the wear-resistant sleeve rubber sleeve. The support assembly includes a first support sleeve and a second support sleeve. One end of the wear-resistant sleeve is embedded in the first support sleeve, and the other end of the wear-resistant sleeve is embedded in the second support sleeve.

[0007] A further feature of this invention is that the wall thickness of the second support sleeve gradually decreases from the middle to the outer edge.

[0008] A further feature of this invention is that the flange buffer pad, the isolation plate, and the wear-resistant sleeve are all made of fluororubber.

[0009] The beneficial technical effects of this utility model are as follows: 1. This utility model can buffer the impact force when the isolator moves back and forth along the pipeline guide rod to the stop position by using a flange buffer pad made of vulcanized fluororubber on the outside of the flange, thereby reducing the hard contact wear between the isolator and the stop, and at the same time reducing the contact wear between the isolator and the guide equipment inside the pipeline.

[0010] 2. In this utility model, a fluororubber wear-resistant sleeve is coaxially fitted on the outer wall of the wear-resistant sleeve. The elastic deformation of the wear-resistant sleeve can absorb the radial impact generated by the hot mineral slurry fluid, avoiding the impact from acting directly on the wear-resistant sleeve and the first and second support sleeves, thus protecting the internal support structure.

[0011] 3. The isolating plate, wear-resistant sleeve and flange buffer gasket of this utility model are all made of fluororubber. Its high temperature resistance can be adapted to the normal working conditions of the isolator at about 120°C. In addition, the corrosion resistance and wear resistance of fluororubber can resist the corrosion and erosion of hot mineral slurry, and are suitable for the use environment of hot mineral slurry pipeline.

[0012] 4. The wear-resistant sleeve of this utility model is made of structural ceramic material, which has wear resistance, high temperature resistance and chemical stability, and can reduce sliding wear between it and the pipe guide rod; the first and second support sleeves are made of PEEK material, which has high temperature resistance and self-lubricating properties, and can ensure the positioning support effect of the wear-resistant sleeve, while reducing the contact friction between the support sleeve and the surrounding parts.

[0013] 5. This utility model uses the first support sleeve and the second support sleeve to radially position and axially support the wear-resistant sleeve, ensuring the coaxiality of the wear-resistant sleeve and the isolation plate, avoiding eccentric jamming when the isolator reciprocates along the guide rod, and improving the stability of equipment operation; the axial clamping of each component is achieved by the cooperation of multiple screws and nuts, ensuring the tightness of the overall structure of the isolator and adapting to the dynamic working conditions in the pipeline.

[0014] 6. This utility model solves the problems of mechanical wear and poor impact resistance of existing isolators through the coordinated design of structural layout and materials, improves the adaptability of isolators to hot slurry pipeline conditions, extends the service life of equipment, and reduces equipment maintenance costs.

[0015] 7. The fluororubber material structure (including a 1mm thick wear-resistant sleeve) used in this utility model has been verified by immersion test in a strong alkaline solution at 150℃ and pH=14. Under extreme corrosive environment, the thickness changes little, the surface has no obvious swelling or pitting defects, and the corrosion resistance is excellent. It can be stably adapted to the high temperature and strong corrosion conditions of hot mineral slurry pipelines. Attached Figure Description

[0016] Figure 1 A cross-sectional view of the overall structure of the 192-GN type isolator of this utility model is shown.

[0017] Figure 2 A schematic diagram of the support assembly structure of the isolator of this utility model is shown.

[0018] Figure 3 A cross-sectional view of the overall structure of the 192-GA type isolator of this utility model is shown.

[0019] Figure 4 The diagram shows the usage status of the 192-GA type isolator of this utility model.

[0020] Reference numerals: 1. Flange buffer pad, 2. Flange, 3. Isolation plate, 4. Wear-resistant sleeve, 5. Screw, 6. Nut, 7. Wear-resistant sleeve rubber sleeve, 8. First support sleeve, 9. Second support sleeve. Detailed Implementation

[0021] The following is with reference to the attached diagram. Figures 1-4The preferred embodiments of this utility model are described below. Those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this utility model and are not intended to limit the scope of protection of this utility model.

[0022] Example 1: 192-GN type isolator (corresponding to) Figure 1 ).

[0023] This embodiment is a 192-GN type hot slurry pipeline isolator, the structure of which is as follows: Figure 1 The overall structural cross-sectional view shows that it includes a flange buffer gasket 1, a flange 2, an isolation plate 3, a wear-resistant sleeve 4, a screw 5, and a nut 6; among which, the flange buffer gasket 1 and the isolation plate 3 are made of fluororubber, and the wear-resistant sleeve 4 is made of structural ceramic.

[0024] A wear-resistant sleeve 4 made of structural ceramic material is coaxially embedded in the central mounting hole of the isolator 3, achieving a fixed nested assembly of the wear-resistant sleeve 4 and the isolator 3. The wear-resistant sleeve 4 and the isolator 3 are connected by an elastic soft connection, which can effectively absorb the impact load and reciprocating motion stress in the hot slurry pipeline, avoid wear and cracking caused by hard contact, and compensate for assembly errors, thereby improving the structural adaptability and service life. Several isolator plates 3 are arranged side by side along the axial direction to form an isolator plate group, and flanges 2 are fixedly installed on both sides of the group. The isolator plate group and the flanges 2 are connected by screws 5 and locked together with nuts 6, ensuring the overall structural tightness of the isolator. Furthermore, several screws 5 are evenly distributed around the flanges 2, so that the clamping force of the flanges 2 on the isolator plates 3 is evenly transmitted, further improving the overall structural stability of the isolator.

[0025] A fluororubber flange buffer gasket 1 is integrally installed on the outer axial side of flange 2 through a vulcanization bonding process. The vulcanization connection ensures the connection strength between flange buffer gasket 1 and flange 2, preventing it from falling off during hot slurry scouring and equipment reciprocating motion. The thickness of flange buffer gasket 1 is greater than the thickness of screw 5 and nut 6, and the setting position of flange buffer gasket 1 corresponds to the stops at both ends of the guide rod, which can prevent screw 5 and nut 6 from directly colliding with the stops.

[0026] In this embodiment, the 192-GN type isolator is fitted onto the guide rod in the middle of the hot mineral slurry pipeline and can reciprocate along the guide rod. Stops at both ends of the guide rod limit its travel. The normal operating temperature of this isolator is approximately 120℃. Fluororubber can be used long-term at 250℃ and withstand short-term temperatures of 300℃, exhibiting significantly better high-temperature resistance than the isolator's normal operating temperature of 120℃. It can maintain stable elastic cushioning and wear-resistant corrosion resistance over a long period. The high-temperature resistance of both fluororubber and structural ceramics is suitable for this operating temperature and can resist the corrosion and erosion of hot mineral slurry. During operation, the flange buffer gasket 1 buffers the impact and contact wear between the isolator and the stops and pipeline guiding equipment; the wear-resistant sleeve 4 made of structural ceramic material directly contacts the pipeline guide rod, reducing sliding wear during the reciprocating movement of the isolator along the guide rod, while simultaneously achieving effective isolation of the hot mineral slurry.

[0027] Example 2: 192-GA type isolator (corresponding to) Figure 2 , Figure 3 ).

[0028] This embodiment is a 192-GA type hot slurry pipeline isolator, the overall structure of which is as follows: Figure 3 As shown, the support assembly structure is as follows Figure 2 As shown, it includes a flange buffer gasket 1, a flange 2, an isolation plate 3, a wear-resistant sleeve 4, a screw 5, and a nut 6, and is further equipped with a wear-resistant sleeve rubber sleeve 7, a first support sleeve 8, and a second support sleeve 9; wherein, the flange buffer gasket 1, the isolation plate 3, and the wear-resistant sleeve rubber sleeve 7 are all made of fluororubber, the wear-resistant sleeve 4 is made of structural ceramic, and the first support sleeve 8 and the second support sleeve 9 are made of PEEK.

[0029] PEEK is the abbreviation for Polyether Ether Ketone, which is a high-performance semi-crystalline thermoplastic special engineering plastic.

[0030] A wear-resistant sleeve 4 made of structural ceramic material is coaxially embedded in the central mounting hole of the isolation plate 3. A 1mm thick fluororubber wear-resistant sleeve 7 is coaxially fitted on the outer wall of the wear-resistant sleeve 4. The wear-resistant sleeve 7 fits tightly with the inner wall of the central mounting hole of the isolation plate 3, realizing the elastic nesting assembly of the wear-resistant sleeve 4 and the isolation plate 3. The optimal thickness of the wear-resistant sleeve 7 is 1mm, which not only ensures good buffering and wear resistance, but also avoids the problems of being too thick to install and too thin to have no buffering effect. It achieves a dual adaptation of structural assembly and functional practicality. The material is fluororubber, which can effectively avoid direct contact between hard parts and buffer impact wear. At the same time, it has been verified by the 150℃ and pH=14 strong alkali soaking test that it has excellent high temperature resistance and corrosion resistance.

[0031] Several isolating plates 3 are arranged side by side along the axial direction to form an isolating plate group. Flanges 2 are fixedly installed on both sides of the isolating plate group. The isolating plate group and the flanges 2 are connected by screws 5 and locked together with nuts 6 to ensure the overall structural tightness of the isolator. In addition, several screws 5 are evenly distributed around the flanges 2, so that the clamping force of the flanges 2 on the isolating plates 3 is evenly transmitted, further improving the overall structural stability of the isolator.

[0032] A fluororubber flange buffer gasket 1 is integrally installed on the outer axial side of flange 2 through a vulcanization bonding process. The vulcanization connection ensures the connection strength between flange buffer gasket 1 and flange 2, preventing it from falling off during hot slurry scouring and equipment reciprocating motion. The thickness of flange buffer gasket 1 is greater than the thickness of screw 5 and nut 6, and the setting position of flange buffer gasket 1 corresponds to the stops at both ends of the guide rod, which can prevent screw 5 and nut 6 from directly colliding with the stops.

[0033] like Figure 2 As shown, a support assembly is installed on the outer side of the wear-resistant sleeve 7. The support assembly includes a first support sleeve 8 and a second support sleeve 9. One end of the wear-resistant sleeve 4 is embedded in the first support sleeve 8, and the other end of the wear-resistant sleeve 4 is embedded in the second support sleeve 9. The wall thickness of the second support sleeve 9 gradually decreases from the middle to the outer edge, which facilitates the smooth insertion of the support assembly into the central assembly hole of the isolator 3. All components are coaxially assembled. The other end of the second support sleeve 9 fits against the flange 2, which improves the assembly accuracy of the internal structure of the isolator, realizes radial positioning and axial support of the wear-resistant sleeve 4, ensures the coaxiality of the wear-resistant sleeve 4 and the isolator 3, and avoids eccentric jamming when the isolator moves along the guide rod.

[0034] The 192-GA type isolator in this embodiment is fitted onto the guide rod in the middle of the hot slurry pipeline and can reciprocate along the guide rod. Its normal operating temperature is approximately 120℃. Fluororubber can be used continuously at 250℃ and withstand short-term temperatures of 300℃. Its high-temperature resistance is far superior to the isolator's normal operating temperature of 120℃, maintaining stable elastic cushioning and wear-resistant / corrosion-resistant properties over a long period. The high-temperature resistance of fluororubber, structural ceramics, and PEEK materials are all suitable for this operating temperature and can resist the corrosion and erosion of hot slurry. Figure 4As shown, during operation, the flange buffer pad 1 buffer isolator impacts and wears against the stop and pipeline guide equipment; the wear-resistant sleeve 7 absorbs the radial impact generated by the hot mineral slurry through elastic deformation, preventing the impact from acting directly on the wear-resistant sleeve 4 and providing protection for the wear-resistant sleeve 4; the wear-resistant sleeve 4 made of structural ceramic material reduces sliding wear with the guide rod, and the first support sleeve 8 and the second support sleeve 9 made of PEEK material ensure stable support for the wear-resistant sleeve 4, while reducing contact friction with surrounding components and preventing direct contact between the wear-resistant sleeve 4 and the support components. Through the elastic buffer of the 1mm thick fluororubber wear-resistant sleeve 7, the radial impact brought by the hot mineral slurry is effectively absorbed, significantly reducing friction and wear between rigid components, and significantly improving the product's service life and adaptability to working conditions.

[0035] In summary, both isolators of this utility model achieve the core functions of hot slurry isolation, wear resistance, and buffering through the above-mentioned structural design, and are suitable for the normal working conditions of hot slurry pipelines at around 120°C. They solve the problems of severe mechanical wear and poor impact resistance of existing isolators. In particular, Embodiment 2 further improves the assembly accuracy and impact resistance of the isolator by adding a support component and a 1mm thick fluororubber wear-resistant sleeve 7, making it suitable for hot slurry pipelines with higher flow rates and stronger impacts. Both models have been verified under actual working conditions, and their service life has been increased from 40 days in the prior art to about 60 days, which is a significant improvement.

[0036] Although the present invention has been described with reference to preferred embodiments, various modifications can be made to it and components can be replaced with equivalents without departing from the scope of the present invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0037] In the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0040] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. An isolator for a hot slurry pipeline, comprising an isolating plate (3), wherein a wear-resistant sleeve (4) is coaxially fitted into the central mounting hole of the isolating plate (3), and several isolating plates (3) are arranged side by side along the axial direction to form an isolating plate group, wherein flanges (2) are provided on both sides of the isolating plate group, and the isolating plate group and the flanges (2) are connected by a screw (5) and locked together by a nut (6), wherein the flanges (2) are bonded together by a vulcanized flange buffer gasket (1) on their outer sides, characterized in that: The outer wall of the wear-resistant sleeve (4) is coaxially fitted with a 1mm thick wear-resistant sleeve rubber sleeve (7). The outer wall of the wear-resistant sleeve rubber sleeve (7) is equipped with a support assembly, which includes a first support sleeve (8) and a second support sleeve (9). One end of the wear-resistant sleeve (4) is embedded in the first support sleeve (8), and the other end of the wear-resistant sleeve (4) is embedded in the second support sleeve (9).

2. The isolator for a hot slurry pipeline according to claim 1, characterized in that: The wall thickness of the second support sleeve (9) gradually decreases from the middle to the outer edge.

3. An isolator for a hot slurry pipeline according to claim 1, characterized in that: The flange buffer pad (1), the isolation plate (3), and the wear-resistant sleeve (7) are all made of fluororubber.

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