A filter device

Abstract

The application relates to a filtering device, which comprises a shell body, a feeding component, a discharging component and a filtering component. The shell body comprises a first opening, a second opening and a third opening. The feeding component is in butt joint with the first opening. The discharging component is in butt joint with the second opening. The filtering component comprises an end cover and a filtering element. The filtering element is located in the interior of the shell body. One end of the filtering element is fixed to the end cover. The other end of the filtering element is arranged along the circumferential side of the second opening and abuts against the shell body. The end cover blocks the third opening and is detachably connected with the shell body, so that the replacement, cleaning and maintenance of the filtering element are more convenient. One end of the filtering element is fixed to the end cover. The other end of the filtering element is arranged along the circumferential side of the second opening and abuts against the shell body, thereby forming a tight radial seal. The unfiltered material is prevented from short-circuiting into the discharging opening, the filtering efficiency is ensured, the material flows into the first opening, flows out of the second opening after passing through the filtering element, the flow channel is reasonably designed, the dead angle or residue is reduced, and the filtering uniformity is improved.

Description

Technical Field

[0001] This application relates to the field of material separation technology, and in particular to a filtration device. Background Technology

[0002] In industries such as chemical, food, pharmaceutical, and environmental protection, filtration devices are widely used for solid-liquid separation, impurity removal, and product purification of liquids, gases, or slurries. Traditional filtration equipment typically includes a housing, filter elements, an inlet, and an outlet. Materials pass through the filter medium under pressure to achieve the desired separation effect. However, existing filtration devices still have the following problems: In many filtration devices, the filter elements are fixed inside the housing, requiring disassembly of the entire device for replacement or cleaning, resulting in long downtime and reduced production efficiency. In some filtration devices, the filter elements are only fixed at one end, which can easily shift or fail to seal under high pressure or high flow conditions, leading to leakage of unfiltered material and affecting product quality. Utility Model Content

[0003] To address the aforementioned technical problems, this application provides a filtration device that can achieve rapid maintenance and reliable sealing while ensuring efficient filtration, thereby improving overall production efficiency and product quality control.

[0004] This application provides a filtering device, comprising: a shell body including a first opening, a second opening and a third opening; a feeding component docking with the first opening; a discharging component docking with the second opening; and a filtering component including an end cap and a filtering element, wherein the filtering element is located inside the shell body, one end of the filtering element is fixed to the end cap, and the other end of the filtering element is disposed along the periphery of the second opening and abuts against the shell body, and the end cap blocks the third opening and is detachably connected to the shell body.

[0005] In some alternative embodiments, the filter element is a cylindrical filter screen, one end of which is welded to the end cap, and the other end of which is disposed along the periphery of the second opening and abuts against the shell body.

[0006] In some optional embodiments, the filter component includes a primary filter element and a secondary filter element. The primary filter element is cylindrical, with one end welded to the end cap and the other end disposed along the periphery of the second opening and abutting against the housing body. The periphery of the secondary filter element is connected to the periphery of the primary filter element near the end of the second opening.

[0007] In some alternative embodiments, the filter element includes a first support element and a funnel-shaped filter screen, the open end of the funnel-shaped filter screen being disposed along the periphery of the second opening and abutting against the shell body, one end of the first support element being welded to the end cap, and the other end of the first support element being welded to the funnel-shaped filter screen.

[0008] In some optional embodiments, the filter element includes a second support element and a barrel-shaped filter screen, one end of the second support element is welded to the end cap, the other end of the second support element is welded to the closed end of the barrel-shaped filter screen, and the open end of the barrel-shaped filter screen is disposed along the periphery of the second opening and abuts against the shell body.

[0009] In some alternative embodiments, the central axes of the second opening and the third opening coincide and are respectively disposed at opposite ends of the central axis on the shell body, and the central axis of the first opening is perpendicular to the central axis of the second opening.

[0010] In some alternative embodiments, the shell body includes an annular protrusion and a cylindrical sidewall, the circumferential side of one end of the cylindrical sidewall being welded to the outer circumferential side of the annular plate, the inner circumferential side of the annular plate forming the second opening, and the other end of the cylindrical sidewall being detachably connected to the end cap.

[0011] In some alternative embodiments, the discharge component is a discharge pipe, which is threadedly connected to the inner circumferential side of the annular protrusion.

[0012] In some alternative embodiments, the other end of the cylindrical sidewall is threaded to the end cap along its central axis.

[0013] In some optional embodiments, a sampling component is also included, which is disposed on the discharge component. The sampling component includes a sampling pipe and a shut-off valve, with one end of the sampling pipe disposed on the discharge component and the other end disposed on the shut-off valve.

[0014] This application has at least the following technical advantages over the prior art:

[0015] This application provides a filtration device, comprising: a housing body, a feeding component, a discharging component, and a filtering component. The housing body includes a first opening, a second opening, and a third opening. The feeding component is connected to the first opening, and the discharging component is connected to the second opening. The filtering component includes an end cap and a filtering element. The filtering element is located inside the housing body. One end of the filtering element is fixed to the end cap, and the other end of the filtering element is arranged along the periphery of the second opening and abuts against the housing body. The end cap seals the third opening and is detachably connected to the housing body, making the replacement, cleaning, and maintenance of the filtering element more convenient. The filter element, with one end fixed to the end cap and the other end arranged along the periphery of the second opening and abutting against the housing body, forms a tight radial seal, preventing unfiltered material from short-circuiting into the discharge port and ensuring filtration efficiency. Material flows in from the first opening, passes through the filtering element, and flows out from the second opening. The flow channel design is reasonable, reducing dead corners or residues and improving filtration uniformity. The filtering element is arranged along the periphery of the second opening, making full use of the internal space of the housing, suitable for high flow rate or large surface area filtration needs. The first and second openings connect to the feeding and discharging components, respectively, while the third opening is dedicated to the installation of the filter element. The structure is compact, reducing the complexity of external piping and saving equipment space. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of the filtering device provided in the embodiments of this application;

[0017] Figure 2 for Figure 1 A top view of the filtering device provided in the embodiment;

[0018] Figure 3 for Figure 1 A bottom view of the filter device provided in the embodiment;

[0019] Figure 4 for Figure 1 A schematic diagram of the left side of the filtering device provided in the embodiment;

[0020] Figure 5 for Figure 1 A schematic diagram of the right side of the filtering device in the provided embodiment;

[0021] Figure 6 This is a schematic diagram of the structure of the filter component provided in the first embodiment of this application;

[0022] Figure 7 This is a schematic diagram of the structure of the filter component provided in the second embodiment of this application;

[0023] Figure 8 for Figure 7 A schematic diagram of the structure of the secondary filter element in the provided embodiment;

[0024] Figure 9 This is a schematic diagram of the structure of the filter component provided in the third embodiment of this application;

[0025] Figure 10 This is a schematic diagram of the structure of the filter component provided in the fourth embodiment of this application;

[0026] Figure 11 for Figure 10 A schematic diagram of the structure in the provided embodiment showing the connection between the fixing plate and the second support element.

[0027] Explanation of reference numerals in the attached drawings: 1-Shell body; 11-Annular protrusion; 12-Cylindrical sidewall; 2-Feeding component; 3-Discharge component; 4-Filtering component; 41-End cap; 411-Protrusion; 42-Filtering element; 421-Primary filter element; 422-Secondary filter element; 423-First support element; 424-Funnel-shaped filter screen; 425-Secondary support element; 426-Barrel-shaped filter screen; 427-Fixing plate; 5-Sampling component. Detailed Implementation

[0028] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0030] In industries such as chemical, food, pharmaceutical, and environmental protection, filtration devices are widely used for solid-liquid separation, impurity removal, and product purification of liquids, gases, or slurries. Traditional filtration equipment typically includes a housing, filter elements, an inlet, and an outlet. Materials pass through the filter medium under pressure to achieve the desired separation effect. However, existing filtration devices still have the following problems: In many filtration devices, the filter elements are fixed inside the housing, requiring disassembly of the entire device for replacement or cleaning, resulting in long downtime and reduced production efficiency. In some filtration devices, the filter elements are only fixed at one end, which can easily shift or fail to seal under high pressure or high flow conditions, leading to leakage of unfiltered material and affecting product quality.

[0031] To address the aforementioned technical problems, this application provides a filtration device that can achieve rapid maintenance and reliable sealing while ensuring efficient filtration, thereby improving overall production efficiency and product quality control.

[0032] The following is in conjunction with the accompanying drawings in the instruction manual. Figures 1 to 11 The structure of the filtration device will be explained in detail.

[0033] This application provides a filtering device, which includes: a shell body 1, including a first opening, a second opening and a third opening; a feeding component 2, which is connected to the first opening; a discharging component 3, which is connected to the second opening; and a filtering component 4, including an end cap 41 and a filtering element 42, wherein the filtering element 42 is located inside the shell body 1, one end of the filtering element 42 is fixed to the end cap 41, and the other end of the filtering element 42 is disposed along the periphery of the second opening and abuts against the shell body 1, and the end cap 41 blocks the third opening and is detachably connected to the shell body 1.

[0034] Specifically, please combine Figures 1-5 The filter element 4 is detachably connected to the housing body 1 via an end cap 41. The end cap 41 not only seals the third opening but also secures the filter element 42, making replacement, cleaning, or maintenance of the filter element 42 more convenient without disassembly. The feeding component 2 connects to the first opening, and the discharging component 3 connects to the second opening, both using standardized interfaces to simplify the assembly process and suit industrial applications. One end of the filter element 42 is fixed to the end cap 41, and the other end of the filter element 42 is positioned along the periphery of the second opening and abuts against the housing body 1, thus forming a tight radial seal to prevent unfiltered material from short-circuiting into the discharging component 3 and ensuring filtration efficiency. Material flows in from the first opening, passes through the filter element 42, and flows out from the second opening. The flow channel design is reasonable, reducing dead corners or residues and improving filtration uniformity. The housing body 1 integrates the first, second, and third openings. The first opening connects to the feeding component 2, the second opening connects to the discharging component 3, and the third opening is dedicated to the installation of the filter element 4. The structure is compact, reducing the complexity of external piping and saving equipment space. The end of the filter element 42 is arranged around the second opening, making full use of the internal space of the housing 1, suitable for high flow rate or large surface area filtration requirements. By replacing the filter element 42 with different precision, it can be adapted to different media such as liquids, gases or slurries, meeting the needs of industries such as chemical, food, and pharmaceutical. The end cap 41 seals the third opening to avoid the risk of pressure or material leakage inside the housing 1, making it especially suitable for high-pressure or corrosive media environments. The two ends of the filter element 42 are fixed to the end cap 41 and the housing 1 respectively, making it less prone to displacement under vibration or pressure fluctuations, ensuring long-term stability.

[0035] Optionally, the feeding component 2 is a feeding pipe, which is welded to the periphery of the shell body 1 to form the first opening.

[0036] In some alternative embodiments, please combine Figure 6 As shown, the filter element 42 is a cylindrical filter screen. One end of the cylindrical filter screen is welded to the end cap 41, and the other end of the cylindrical filter screen is disposed along the periphery of the second opening and abuts against the shell body 1.

[0037] Specifically, one end of the filter element 42 is fixed to the end cap 41, and the other end of the filter element 42 is arranged along the periphery of the second opening and abuts against the shell body 1, thereby forming a tight radial seal to prevent unfiltered material from short-circuiting into the discharge component 3 and ensuring filtration efficiency. Material flows in from the first opening, passes through the filter element 42, and flows out from the second opening. The flow channel design is reasonable, reducing dead corners or residues and improving filtration uniformity. A rigid connection between the filter element 42 and the end cap 41 is achieved through welding, preventing axial displacement or loosening of the cylindrical filter screen under high pressure or pulsed flow, making it particularly suitable for high-flow, high-viscosity media or media containing solid particles. The other end of the cylindrical filter screen is arranged along the periphery of the second opening and abuts against the shell body 1, forming radial support, dispersing fluid pressure, preventing filter screen deformation or collapse, and extending service life.

[0038] Furthermore, the end cap 41 and one end of the cylindrical filter screen are welded together, completely sealing the gap between the filter screen and the end cap 41 to prevent unfiltered media from directly seeping into the discharge port, thus achieving a static seal. A sealing ring is provided at the contact point between the shell body 1 and the cylindrical filter screen, and the cylindrical filter screen abuts against the sealing ring, ensuring tight contact between the cylindrical filter screen and the shell body 1, achieving a dynamic seal, and ensuring that the filtered media can only enter the discharge component 3 through the cylindrical filter screen. The structure of the cylindrical filter screen can provide a larger surface area within a certain volume, reducing the load per unit area, reducing the risk of clogging, and improving processing efficiency.

[0039] In some alternative embodiments, please combine Figure 7 and Figure 8 As shown, the filter element 42 includes a primary filter element 421 and a secondary filter element 422. The primary filter element 421 is cylindrical. One end of the primary filter element 421 is welded to the end cap 41. The other end of the primary filter element 421 is disposed along the periphery of the second opening and abuts against the shell body 1. The periphery of the secondary filter element 422 is connected to the periphery of the primary filter element 421 near the end of the second opening.

[0040] Specifically, one end of the filter element 42 is fixed to the end cap 41, and the other end of the filter element 42 is disposed along the periphery of the second opening and abuts against the housing body 1, thereby forming a tight radial seal to prevent unfiltered material from short-circuiting into the discharge component 3 and ensuring filtration efficiency. The material flows in from the first opening, passes through the filter element 42, and flows out from the second opening. The flow channel design is reasonable, reducing dead corners or residues and improving filtration uniformity. The filter element 42 and the end cap 41 are rigidly connected by welding, avoiding axial displacement or loosening of the filter element 42 under high pressure or pulse flow, which is especially suitable for media with high flow rate, high viscosity, or containing solid particles.

[0041] Furthermore, the primary filter element 421 is a primary filter screen, and the secondary filter element 422 is a secondary filter screen. The pore size of the primary filter screen is larger than that of the secondary filter screen. The primary filter element 421 first intercepts larger particles or high-concentration impurities, reducing the load on the secondary filter element. The secondary filter element 422 further refines the filtration, achieving a higher purity output, thus realizing gradient filtration between primary coarse filtration and secondary fine filtration, improving filtration accuracy. After the fluid undergoes preliminary filtration by the primary filter element 421, the flow rate and pressure tend to be uniform before entering the secondary filter element 422, avoiding a sharp increase in pressure loss caused by direct high-pressure impact on the fine filter layer. The secondary filter element is connected to the end of the primary filter element, continuing the flow directionality, preventing fluid backflow or eddy formation, and reducing energy loss.

[0042] In some alternative embodiments, please combine Figure 9 As shown, the filter element 42 includes a first support element 423 and a funnel-shaped filter screen 424. The open end of the funnel-shaped filter screen 424 is disposed along the periphery of the second opening and abuts against the shell body 1. One end of the first support element 423 is welded to the end cap 41, and the other end of the first support element 423 is welded to the funnel-shaped filter screen 424.

[0043] Specifically, the first support element 423 acts as a rigid skeleton, providing axial and radial support to prevent the funnel-shaped filter screen 424 from collapsing or deforming under the impact of high-pressure fluid. The first support element 423 also disperses the fluid pressure load, preventing damage caused by localized stress concentration in the filter screen. The first support element 423 is welded and fixed to the end cap 41 and the funnel-shaped filter screen 424 respectively, forming an integral rigid structure. The open end of the funnel-shaped filter screen 424 is arranged circumferentially along the second opening and presses against the shell body 1, expanding the initial filtration area, reducing the flow velocity, and minimizing the risk of instantaneous particle blockage. One end of the second support element 425 is welded to the end cap 41, and the other end is welded to the funnel-shaped filter screen 424, forming a closed filtration unit that completely eliminates the possibility of unfiltered media circling the filter screen. A sealing ring is provided at the position corresponding to the open end of the funnel-shaped filter screen 424 on the shell body 1, ensuring a tight fit between the open end of the funnel-shaped filter screen 424 and the sealing ring, improving the dynamic sealing effect.

[0044] Furthermore, the first support element 423 is a support rod.

[0045] In some alternative embodiments, please combine Figure 10 and Figure 11 As shown, the filter element 42 includes a second support element 425 and a barrel-shaped filter screen 426. One end of the second support element 425 is welded to the end cap 41, and the other end of the second support element 425 is welded to the closed end of the barrel-shaped filter screen 426. The open end of the barrel-shaped filter screen 426 is arranged along the periphery of the second opening and abuts against the shell body 1.

[0046] Specifically, the second support element 425 acts as a rigid frame, providing axial support for the barrel-shaped filter screen 426. This prevents the filter screen 426 from axially compressing or bending under the impact of high-pressure fluid, enhancing the overall structural stability and preventing vibration or fatigue fracture caused by pressure fluctuations. The barrel-shaped filter screen 426 is cylindrical, maximizing the effective filtration area, reducing the load per unit area, and extending the filter screen's lifespan. Fluid passes radially through the barrel-shaped filter screen 426, resulting in a uniform flow field distribution and preventing premature clogging caused by excessively high local flow velocities. The open end of the barrel-shaped filter screen 426 is positioned along the periphery of the second opening and abuts against the shell body 1, ensuring that all fluid passes through the barrel-shaped filter screen 426 without short-circuit leakage, thus improving filtration efficiency. One end of the second support element 425 is welded to the end cap 41, and the other end is welded to the closed end of the barrel-shaped filter screen 426, thereby forming a completely closed filtration unit and preventing unfiltered media from flowing around it. A sealing ring is provided at the position corresponding to the opening end of the barrel-shaped filter 426 on the shell body 1. The opening end of the barrel-shaped filter 426 fits tightly with the sealing ring, improving the dynamic sealing effect. The second support element 425 and the barrel-shaped filter 426 can be removed as a whole by removing the end cover 41, which is convenient for offline cleaning. The opening end and the closed end of the barrel-shaped filter 426 are arranged opposite each other in their own axial direction. The closed end is a fixed plate 427, and one end of the side plate is connected along the periphery of the fixed plate 427. The side plate is a filter screen, and the side plate is a cylindrical filter screen.

[0047] Furthermore, the second support element 425 includes a plurality of support rods arranged circumferentially along the barrel-shaped filter screen 426, with one end of each support rod connected to the end cap 41 and the other end connected to the closed end of the barrel-shaped filter screen 426.

[0048] In some optional embodiments, the central axes of the second opening and the third opening coincide and are respectively disposed at opposite ends of the central axis on the shell body 1, and the central axis of the first opening is perpendicular to the central axis of the second opening.

[0049] Specifically, the second and third openings are coaxially opposed to form a straight main channel. After the fluid is vertically injected through the first opening, it diffuses radially along the shell and passes axially through the filter element, resulting in a smooth flow path. The coaxial opposition of the second and third openings balances the pressure load on the shell body 1 along the central axis, reducing local stress concentration. The filter element 42 can be pulled out coaxially through the third opening without the need for multi-angle adjustments. The end cap 41 includes a base plate and a side plate. The side plate is circumferentially connected to the base plate. At least one of the inner and outer surfaces of the side plate is threaded. At least one of the inner and outer surfaces of the shell body 1 at the third opening is threaded. The side plate and the shell body 1 are threaded together. The base plate is provided with a protrusion 411, which is located on the surface of the base plate that contacts the outside. The protrusion 411 has a hole.

[0050] In some optional embodiments, the shell body 1 includes an annular protrusion 11 and a cylindrical sidewall 12. The peripheral side of one end of the cylindrical sidewall 12 is welded to the outer peripheral side of the annular protrusion 11, and the inner peripheral side of the annular protrusion 11 forms a second opening. The other end of the cylindrical sidewall 12 is detachably connected to the end cap 41.

[0051] Specifically, one end of the filter element 42 is fixed to the end cap 41, and the other end of the filter element 42 is disposed along the periphery of the second opening and abuts against the annular protrusion 11. The outlet flow channel is coaxially aligned with the filter element 42 to achieve linear fluid output. In addition, the annular protrusion 11 guides the fluid entering the discharge component 3. The outer surface of the other end of the cylindrical sidewall 12 is threaded, and the cylindrical sidewall 12 is threadedly connected to the end cap 41. The sealing ring is fitted to the surface of the annular protrusion 11 facing the inside of the shell body 1.

[0052] In some optional embodiments, the discharge component 3 is a discharge pipe, which is threaded to the inner circumferential side of the annular protrusion 11.

[0053] Specifically, the discharge pipe and the annular protrusion 11 are threaded together to form a metal-sealed interface. The thread preload creates radial compressive stress at the connection, enhancing its resistance to vibration and loosening. The discharge pipe can be manually screwed in or out, allowing for replacement or cleaning in a short time.

[0054] In some alternative embodiments, the other end of the cylindrical sidewall 12 is threaded to the end cap 41 along its central axis.

[0055] Specifically, the end cap 41 can be manually screwed in or out, allowing for the replacement and maintenance of the filter element 42 in a short time. The other end of the cylindrical sidewall 12 is threaded to the end cap 41 along its central axis, generating uniform radial compressive stress and maintaining sealing stability under vibration conditions.

[0056] In some optional embodiments, the filtration device further includes a sampling component 5, which is disposed on the discharge component 3. The sampling component 5 includes a sampling pipe and a shut-off valve, with one end of the sampling pipe disposed on the discharge component 3 and the other end disposed on the shut-off valve.

[0057] Specifically, the filtration device not only provides filtration but also integrates sampling functionality. The sampling component 5 is directly installed in the discharge component 3, allowing for real-time extraction of filtered samples for online testing. During normal production line operation, filtered samples can be extracted at any time via a shut-off valve. The sampling pipe and discharge pipe are connected by socket welding, which offers higher strength than threaded connections.

[0058] In this application, the term "multiple" refers to at least two or more, unless otherwise expressly defined. The terms "install," "connect," "join," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "join" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0059] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A filtration device, characterized in that, include: The shell body (1) includes a first opening, a second opening and a third opening; The feeding component (2) is connected to the first opening; The discharge component (3) is connected to the second opening; The filter component (4) includes an end cap (41) and a filter element (42). The filter element (42) is located inside the shell body (1). One end of the filter element (42) is fixed to the end cap (41), and the other end of the filter element (42) is arranged along the periphery of the second opening and abuts against the shell body (1). The end cap (41) blocks the third opening and is detachably connected to the shell body (1). The filter element (42) is a cylindrical filter screen. One end of the cylindrical filter screen is welded to the end cap (41), and the other end of the cylindrical filter screen is arranged along the periphery of the second opening and abuts against the shell body (1). A sealing ring is provided at the position where the shell body (1) contacts the cylindrical filter screen. The cylindrical filter screen abuts against the sealing ring, so that the cylindrical filter screen and the shell body (1) are in close contact, achieving dynamic sealing.

2. The filtration device according to claim 1, characterized in that, The filter element (42) includes a primary filter element (421) and a secondary filter element (422). The primary filter element (421) is cylindrical. One end of the primary filter element (421) is welded to the end cap (41). The other end of the primary filter element (421) is disposed along the periphery of the second opening and abuts against the shell body (1). The periphery of the secondary filter element (422) is connected to the periphery of the primary filter element (421) near the end of the second opening.

3. The filtration device according to claim 1, characterized in that, The filter element (42) includes a first support element (423) and a funnel-shaped filter screen (424). The open end of the funnel-shaped filter screen (424) is disposed along the periphery of the second opening and abuts against the shell body (1). One end of the first support element (423) is welded to the end cap (41), and the other end of the first support element (423) is welded to the funnel-shaped filter screen (424).

4. The filtration device according to claim 1, characterized in that, The filter element (42) includes a second support element (425) and a barrel-shaped filter screen (426). One end of the second support element (425) is welded to the end cap (41), and the other end of the second support element (425) is welded to the closed end of the barrel-shaped filter screen (426). The open end of the barrel-shaped filter screen (426) is arranged along the periphery of the second opening and abuts against the shell body (1).

5. The filtration device according to any one of claims 1 to 4, characterized in that, The central axes of the second opening and the third opening coincide and are respectively provided at opposite ends of the central axis on the shell body (1), and the central axis of the first opening is perpendicular to the central axis of the second opening.

6. The filtration device according to claim 4, characterized in that, The shell body (1) includes an annular protrusion (11) and a cylindrical sidewall (12). The circumferential side of one end of the central axial direction of the cylindrical sidewall (12) is welded to the outer circumferential side of the annular protrusion (11). The inner circumferential side of the annular protrusion (11) forms the second opening. The other end of the central axial direction of the cylindrical sidewall (12) is detachably connected to the end cap (41).

7. The filtration device according to claim 6, characterized in that, The discharge component (3) is a discharge pipe, which is threadedly connected to the inner circumferential side of the annular protrusion (11).

8. The filtration device according to claim 6, characterized in that, The other end of the cylindrical sidewall (12) is threaded to the end cap (41) along its central axis.

9. The filtration device according to claim 1, characterized in that, It also includes a sampling component (5), which is disposed on the discharge component (3). The sampling component (5) includes a sampling pipe and a shut-off valve. One end of the sampling pipe is disposed on the discharge component (3), and the other end is disposed on the shut-off valve.

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