A tube sheet structure for medium and high pressure filters and a medium and high pressure filter.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-26
- Publication Date
- 2026-08-11
AI Technical Summary
在相关技术中，管板设计较为简单，局部应力较为集中，导致管板稳定性较差
通过积液孔的第一侧壁和过渡侧壁均为弧形，可避免积液孔出现如月牙形积液腔的尖锐拐角或突然的截面变化的情况，从而使管板本体与积液孔连接区域的力流能够平滑传递，以减少积液孔边缘，尤其是靠近管板本体边缘的高应力区的应力集中效应，从而提升管板在中高压工况下的结构完整性和运行可靠性，通过积液孔的第二侧壁为线形，可保证管板本体结构连续性的同时，合理控制积液孔的容积与形状，避免因过度复杂的弧形设计导致积液孔容积过大引发材料冗余或过小影响积液收集，确保积液能通过积液孔顺畅流入积液腔，维持过滤系统的连续运行，此外，积液腔通过积液孔收集过滤积液，可确保过滤后的积液快速、均匀地流入积液腔，避免在管板表面或孔道内滞留，减少了积液滞留引发的局部腐蚀或积液冲击管板和过滤元件的现象，间接延长了管板及过滤系统的服役寿命。
Smart Images
Figure CN224613353U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of filter structure technology, and more specifically, to a tube sheet structure for medium and high pressure filters and a medium and high pressure filter. Background Technology
[0002] In the structural design of medium and high pressure filters, the tube sheet is a key pressure-bearing component connecting the filter element and the pressure vessel. Its rational structural design has a decisive impact on the overall performance and service life of the medium and high pressure filter. In related technologies, the tube sheet design is relatively simple, resulting in concentrated local stress and thus poor stability. Utility Model Content
[0003] The problem this invention addresses is how to improve the stability of tube sheets.
[0004] To address the aforementioned problems, this utility model provides a tube sheet structure for medium and high pressure filters, as well as a medium and high pressure filter.
[0005] In a first aspect, this utility model provides a tube sheet structure for a medium- and high-pressure filter, including a tube sheet body and a liquid collection chamber. The liquid collection area of the tube sheet body is provided with a liquid collection hole, which is an arc-shaped hole. The first sidewall of the liquid collection hole near the edge of the liquid collection area is arc-shaped, and the second sidewall of the liquid collection hole away from the edge of the liquid collection area is linear. The transition sidewall between the first sidewall and the second sidewall is arc-shaped. The liquid collection chamber is located below the liquid collection area and is used to collect filtered liquid through the liquid collection hole.
[0006] Optionally, an anti-rush baffle is vertically provided inside the liquid accumulation chamber.
[0007] Optionally, the filtration area of the tube sheet body is provided with multiple tube holes, which are used to connect to the filter element.
[0008] Optionally, the plurality of the orifices are arranged in an equilateral triangular array.
[0009] Optionally, the connection between the tube sheet body and the filter housing, and the connection between the tube sheet body and the liquid accumulation chamber, are provided with transition rounded corners.
[0010] Secondly, this utility model provides a medium- and high-pressure filter, including the tube sheet structure for medium- and high-pressure filters as described in the first aspect.
[0011] Optionally, the medium- and high-pressure filter further includes a filter housing and a filter element. The tube sheet body, the liquid collection chamber, and the filter element are all located inside the filter housing, and the filter element is connected to the tube holes of the tube sheet body.
[0012] Optionally, the medium- and high-pressure filter further includes a steam drum, and the top of the filter housing is connected to the top of the steam drum via a gas phase pipeline.
[0013] Optionally, the area on the filter housing opposite to the liquid accumulation chamber is connected to the bottom of the steam drum via a liquid phase pipeline.
[0014] Optionally, the steam drum is also equipped with multiple level gauges.
[0015] The tube sheet structure for medium and high pressure filters according to this utility model, and the beneficial effects of medium and high pressure filters are as follows: The arc-shaped first and transition sidewalls of the liquid collection holes prevent sharp corners or sudden cross-sectional changes, such as crescent-shaped liquid collection cavities, thus ensuring smooth force flow transmission between the tube sheet body and the liquid collection holes. This reduces stress concentration at the edges of the liquid collection holes, especially in high-stress areas near the tube sheet body, thereby improving the structural integrity and operational reliability of the tube sheet under medium and high pressure conditions. The linear second sidewall of the liquid collection holes ensures the continuity of the tube sheet structure while rationally controlling the volume and shape of the liquid collection holes. This avoids excessively complex arc designs that could lead to material redundancy due to overly large holes or insufficient volume that could affect liquid collection. It ensures that the liquid can flow smoothly into the liquid collection cavity through the liquid collection holes, maintaining the continuous operation of the filtration system. Furthermore, the collection of filtered liquid through the liquid collection holes ensures that the filtered liquid flows quickly and evenly into the liquid collection cavity, preventing stagnation on the tube sheet surface or within the channels. This reduces localized corrosion or liquid impact on the tube sheet and filter elements caused by liquid stagnation, indirectly extending the service life of the tube sheet and filtration system. Attached Figure Description
[0016] Figure 1 One of the schematic diagrams of a tube sheet structure for a medium- or high-pressure filter provided in an embodiment of this utility model; Figure 2 A second schematic diagram of a tube sheet structure for a medium- or high-pressure filter provided in an embodiment of this utility model; Figure 3 This is a schematic diagram of the structure of the medium and high pressure filter provided in the embodiment of this utility model; Figure 4 One of the schematic diagrams of the crescent-shaped fluid accumulation cavity provided in the embodiment of this utility model; Figure 5 This is the second schematic diagram of the crescent-shaped fluid accumulation cavity provided in the embodiment of this utility model.
[0017] Explanation of reference numerals in the attached figures: 1. Tube sheet body; 11. Liquid collection hole; 12. Tube hole; 2. Liquid collection chamber; 21. Crescent-shaped liquid collection chamber; 3. Anti-impact baffle; 4. Filter element; 5. Filter housing; 6. Steam drum; 7. Gas phase pipeline; 8. Liquid phase pipeline; 9. Level gauge. Detailed Implementation
[0018] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.
[0019] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.
[0020] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".
[0021] like Figures 1 to 3 As shown in the figure, an embodiment of the present invention provides a tube sheet structure for a medium- and high-pressure filter, including a tube sheet body 1 and a liquid collection chamber 2. The liquid collection area of the tube sheet body 1 is provided with a liquid collection hole 11. The liquid collection hole 11 is an arc-shaped hole. The first sidewall of the liquid collection hole 11 near the edge of the liquid collection area is arc-shaped, and the second sidewall of the liquid collection hole 11 away from the edge of the liquid collection area is linear. The transition sidewall between the first sidewall and the second sidewall is arc-shaped. The liquid collection chamber 2 is located below the liquid collection area and is used to collect filtered liquid through the liquid collection hole 11.
[0022] Specifically, Figure 2This is a side sectional view of the tube sheet body 1 and the liquid collection chamber 2. The tube sheet body 1 is a plate structure, divided into a liquid collection area and a filtration area. The proportions of the liquid collection area and the filtration area on the plate are set according to actual needs, such as... Figure 1 As shown, the liquid accumulation area is the area where the liquid accumulation hole 11 is located, and the filtration area is the area where all the filter holes 12 are located. The accumulating hole 11 is an arc-shaped hole, for example, it is a long arc. The first sidewall of the accumulating hole 11 near the edge of the accumulating area is arc-shaped, and the arc is similar in size to the arc of the edge of the accumulating area. The second sidewall of the accumulating hole 11 away from the edge of the accumulating area is linear, and the transition sidewall between the first and second sidewalls is arc-shaped, so that the first and second sidewalls are smoothly connected. This is because when the component is under load, the force line will be transmitted along the continuous path of the structure. If it encounters a sharp corner, a sudden change in cross-section, or other "discontinuity points", the force line cannot transition smoothly and will accumulate in a local area, resulting in a sharp increase in stress (i.e., stress concentration). Therefore, the smooth connection of the first and second sidewalls can make the inner wall of the accumulating hole 11 smooth, so as to reduce the geometrical abrupt changes (such as sharp corners at the root or steep changes in cross-section) in the crescent-shaped accumulating cavity 21 in related technologies, so that the force flow in the connection area between the tube sheet body 1 and the accumulating hole 11 can be smoothly transmitted. The accumulating cavity 2 is used to collect filtered accumulating liquid through the accumulating hole 11. Figure 4 and Figure 5 As shown, Figure 4 This is a top view of the tube sheet body 1 and the crescent-shaped fluid accumulation cavity 21. Figure 5 This is a side sectional view of the tube sheet body 1 and the crescent-shaped liquid accumulation cavity 21. The crescent-shaped liquid accumulation cavity 21 refers to the groove with a completely open upper end formed by bending the tube sheet body directly downwards to form the liquid accumulation area of the tube sheet. Since most tube sheets are circular, after the liquid accumulation area and the filtration area are divided proportionally, the shape of the liquid accumulation area is crescent-shaped. Because the crescent-shaped liquid accumulation cavity 21 is formed by bending the tube sheet body 1 directly downwards to form the groove, there are sharp corners at the root and steep changes in the cross section. However, the liquid accumulation cavity 2 of this application is not formed by bending the tube sheet body directly downwards to form the groove. It is located below the liquid accumulation area, and the liquid accumulation area is part of the tube sheet body 1. It is connected to the filtration area and has a liquid accumulation hole 11 for the liquid to pass through. Therefore, there are no sharp corners at the root and steep changes in the cross section, and there is no problem of local stress accumulation.
[0023] In this embodiment, the first and transition sidewalls of the accumulating hole 11 are both arc-shaped, which avoids sharp corners or sudden cross-sectional changes in the accumulating hole 11. This allows for smooth force flow transmission in the connection area between the tube sheet body 1 and the accumulating hole 11, reducing stress concentration at the edge of the accumulating hole 11, especially in the high-stress area near the edge of the tube sheet body 1. This improves the structural integrity and operational reliability of the tube sheet under medium and high pressure conditions. The second sidewall of the accumulating hole 11 is linear, ensuring the structural continuity of the tube sheet body 1 while reasonably controlling the volume and shape of the accumulating hole 11, avoiding excessive... The complex arc-shaped design affects the collection of sludge, ensuring that the sludge can flow smoothly into the sludge chamber through the sludge collection hole 11, maintaining the continuous operation of the filtration system. Compared with the full arc structure, the linear sidewall is easier to process and manufacture, which can reduce the processing difficulty and cost caused by the complex geometry. In addition, the sludge chamber 2 collects the filtered sludge through the long arc-shaped sludge collection hole 11, which can ensure that the filtered sludge flows into the sludge chamber 2 quickly and evenly, avoiding stagnation on the tube sheet surface or in the channels. This reduces the phenomenon of local corrosion or sludge impact on the tube sheet and filter elements caused by sludge stagnation, and indirectly extends the service life of the tube sheet and filtration system.
[0024] Optionally, such as Figure 3 As shown, the liquid accumulation chamber 2 is vertically equipped with an anti-impact baffle 3.
[0025] Specifically, a baffle plate 3 is vertically installed inside the liquid accumulation chamber 2. The baffle plate 3 maintains a certain distance from the side wall of the liquid accumulation chamber 2. The surface of the baffle plate 3 can have several through holes or adopt a grid structure to form a medium flow channel. The material of the baffle plate 3 matches the characteristics of the filter medium (such as corrosion-resistant material) and can be fixedly connected to the inner wall of the liquid accumulation chamber 2 by a bracket to ensure that no displacement or vibration occurs in the high-pressure flow field. The baffle plate 3 can directly block the high-speed medium flow in the liquid accumulation chamber 2, disperse it into a gentle flow, avoid the medium directly impacting the inner wall of the liquid accumulation chamber, and reduce local wear and fatigue damage caused by impact loads.
[0026] Optionally, such as Figure 1 As shown, the filter area of the tube sheet body 1 is provided with a plurality of tube holes 12, which are used to connect with the filter element 4.
[0027] Specifically, the filter element 4 is set in a one-to-one correspondence with the pipe hole 12.
[0028] Optionally, such as Figure 1 As shown, the plurality of the tube holes 12 are arranged in an equilateral triangular array.
[0029] Specifically, the orifices 12 on the tube sheet are arranged in an equilateral triangle array, meaning that the center line connecting any three adjacent orifices 12 forms an equilateral triangle. The spacing (center-to-center distance) between adjacent orifices 12 is equal. The spacing needs to be designed according to the size of the filter element, the flow rate requirement, and the strength of the tube sheet to ensure that the "bridge" (the material area between adjacent orifices) has sufficient thickness to resist pressure loads. The equilateral triangle array makes the orifices 12 more evenly distributed on the tube sheet, and the stress on the bridge area is more balanced. Compared with a square array, it can reduce local stress concentration (especially under high pressure conditions, the bridge is a stress-sensitive area). Moreover, with the same tube sheet area, the equilateral triangle array can accommodate more orifices, increasing the number of filter elements and improving the filtration flow rate (the amount of media processed per unit time), balancing structural strength and filtration efficiency. In addition, the regular array distribution facilitates CNC machining (such as drilling), reducing manufacturing difficulty, and the standardized spacing parameters can be adapted to filter elements of different specifications, improving design versatility.
[0030] Optionally, the connection between the tube sheet body 1 and the filter housing 5, and the connection between the tube sheet body 1 and the liquid accumulation chamber 2, are provided with transition rounded corners.
[0031] Specifically, the connection between the tube sheet body 1 and the filter housing 5, as well as the connection between the tube sheet body 1 and the liquid accumulation chamber 2, are provided with transition fillets, i.e., arc transitions. Structural discontinuities (such as right-angle corners) are high-incidence areas of stress concentration. Transition fillets allow the force flow (load transmission path) to flow smoothly through the arc transition, avoiding the "accumulation" of force lines at the corners, and significantly reducing local stress peaks. Under cyclic loads (such as pressure fluctuations), acute or right-angle areas are prone to fatigue cracks. Transition fillets can reduce the damage of cyclic stress to local materials, extend the fatigue life of the tube sheet body 1, and in the connection area between the tube sheet body 1 and the filter housing 5, transition fillets can improve the stress state of the weld, reduce stress abrupt changes at the connection between the weld and the base material, and reduce the risk of structural failure caused by welding defects (such as cracks).
[0032] like Figure 3 As shown, this utility model provides a medium-high pressure filter, including the tube sheet structure for medium-high pressure filters as described above.
[0033] Optionally, such as Figure 3 As shown, the medium- and high-pressure filter also includes a filter housing 5 and a filter element 4. The tube sheet body 1, the liquid collection chamber 2, and the filter element 4 are all located inside the filter housing 5. The filter element 4 is connected to the tube hole 12 of the tube sheet body 1.
[0034] Optionally, the medium- and high-pressure filter further includes a steam drum 6, and the top of the filter housing 5 is connected to the top of the steam drum 6 via a gas phase pipeline 7.
[0035] Optionally, the area on the filter housing 5 opposite to the liquid accumulation chamber 2 is connected to the bottom end of the steam drum 6 via a liquid phase pipeline 8.
[0036] Specifically, the tube sheet body 1, the liquid collection chamber 2, and the filter element 4 are all located inside the filter housing 5. The filter element 4 corresponds one-to-one with the tube sheet body 1 and is connected to the tube hole 12 of the tube sheet body 1. The top of the filter housing 5 is connected to the top of the steam drum 6 via a gas phase pipeline 7, and the bottom of the filter housing 5, near the liquid collection chamber 2, is connected to the bottom of the steam drum 6 via a liquid phase pipeline 8. The steam drum 6 receives the gas-liquid mixture from the filter and achieves natural separation of the gas and liquid phases through its internal space, reducing the impact of medium fluctuations on the subsequent system. Under medium-high pressure conditions (≥1.6MPa), the steam drum 6 can stabilize the system pressure and prevent overpressure. The filter can temporarily store the separated gaseous or liquid media due to structural shocks caused by sudden pressure changes, and distribute it to subsequent pipelines or equipment according to system requirements to ensure the continuity of the filtration and separation process. The gas phase pipeline 7 is used to transport the separated gas (such as gaseous components not intercepted by the filter element) in the filter to the steam drum 6 to achieve gas-liquid separation. By designing the inner diameter and length of the pipeline, the gas flow rate is controlled to avoid pipeline vibration or pressure loss caused by excessive airflow, and to maintain the gas pressure balance between the filter and the steam drum 6. Under cyclic load or pressure fluctuations, the gas phase pipeline 7 can buffer changes in gas flow rate and reduce additional stress on the filter tube sheet and shell. The liquid phase pipeline 8 is used to transport the filtered liquid (such as clean liquid after impurities are removed by the filter element) collected in the liquid collection chamber 2 to the steam drum 6, preventing liquid from stagnating in the filter. Through pipeline design (such as pipe diameter and slope), it ensures smooth liquid flow under medium and high pressure, preventing pipe wear or pressure buildup in the liquid collection chamber due to excessive flow velocity. The liquid phase pipeline 8 can be matched with the volume and depth parameters of the liquid collection chamber 2 to ensure complete drainage of the liquid and reduce corrosion of the tube sheet by residual liquid. During filtration, the medium to be filtered enters the filter housing 5, passes through the pipe hole 12 into the filter element 4, and is discharged after filtration by the filter element 4. The filtered liquid medium enters the liquid collection chamber 2 through the liquid collection hole 11 and then enters the steam drum 6 through the liquid phase pipeline 8. The filtered liquid medium also enters the steam drum 6 through the gas phase pipeline 7.
[0037] Optionally, such as Figure 3 As shown, the steam drum 6 is also equipped with multiple liquid level gauges 9.
[0038] Specifically, the steam drum 6 is also equipped with multiple level gauges 9 to measure the liquid level at different positions of the steam drum 6.
[0039] The advantages of the medium- and high-pressure filter in this embodiment compared to the prior art are the same as those of the tube sheet structure for medium- and high-pressure filters described above, and will not be repeated here.
[0040] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.
Claims
1. A tube sheet structure for medium and high pressure filters, characterized in that, The tube sheet body (1) includes a tube sheet body (1) and a liquid collection chamber (2). The liquid collection area of the tube sheet body (1) is provided with a liquid collection hole (11). The liquid collection hole (11) is an arc-shaped hole. The first sidewall of the liquid collection hole (11) near the edge of the liquid collection area is arc-shaped, and the second sidewall of the liquid collection hole (11) away from the edge of the liquid collection area is linear. The transition sidewall between the first sidewall and the second sidewall is arc-shaped. The liquid collection chamber (2) is located below the liquid collection area. The liquid collection chamber (2) is used to collect filtered liquid through the liquid collection hole (11).
2. The tube sheet structure for medium and high pressure filters according to claim 1, characterized in that, The liquid accumulation chamber (2) is vertically equipped with an anti-impact baffle (3).
3. The tube sheet structure for medium and high pressure filters according to claim 1, characterized in that, The filter area of the tube sheet body (1) is provided with a plurality of tube holes (12), which are used to connect to the filter element (4).
4. The tube sheet structure for medium and high pressure filters according to claim 3, characterized in that, The multiple holes (12) are arranged in an equilateral triangular array.
5. The tube sheet structure for medium and high pressure filters according to claim 1, characterized in that, The connection between the tube sheet body (1) and the filter housing (5), and the connection between the tube sheet body (1) and the liquid accumulation chamber (2) are both provided with transition rounded corners.
6. A medium- or high-pressure filter, characterized in that, Includes the tube sheet structure for medium and high pressure filters as described in any one of claims 1 to 5.
7. The medium- and high-pressure filter according to claim 6, characterized in that, It also includes a filter housing (5) and a filter element (4). The tube sheet body (1), the liquid collection chamber (2) and the filter element (4) are all located inside the filter housing (5). The filter element (4) is connected to the tube hole (12) of the tube sheet body (1).
8. The medium- and high-pressure filter according to claim 7, characterized in that, It also includes a steam drum (6), and the top of the filter housing (5) is connected to the top of the steam drum (6) through a gas phase pipeline (7).
9. The medium- and high-pressure filter according to claim 8, characterized in that, The area on the filter housing (5) opposite to the liquid accumulation chamber (2) is connected to the bottom end of the steam drum (6) through the liquid phase pipeline (8).
10. The medium- and high-pressure filter according to claim 8, characterized in that, The steam drum (6) is also equipped with multiple level gauges (9).