Filter assembly and application device

Abstract

The application discloses a filter assembly and an application device, wherein the filter assembly comprises a shell and a filter part; the shell has a through cavity; the cavity comprises a first part, a second part and a third part which are sequentially communicated; the second part comprises a main channel and a secondary channel; the filter part comprises a first filter, an anti-backflow part and a second filter; the first filter is installed in the main channel; the anti-backflow part is installed in the secondary channel; the second filter is installed in the secondary channel; and a dirt storage cavity is formed between the anti-backflow part and the second filter. The filter assembly of the application reduces the possibility of oil line blockage by setting the dirt storage cavity; and the filter assembly of the application further reduces the possibility of oil line blockage by separating the main channel and the secondary channel. In addition, even if the filter assembly of the application encounters the backflow of insulating oil during use, the anti-backflow part can block the backflow of impurities to the first part of the shell.

Description

Technical Field

[0001] This invention relates to the field of fluid filtration technology, and more particularly to a filtration component and application device. Background Technology

[0002] Nowadays, fluids play a vital role in various industries. For example, in working environments with high temperatures, high electric fields, and strong radiation, insulating oil is commonly used to cool equipment and ensure its normal operation. However, if insulating oil operates in such environments for extended periods, arcing and breakdown can occur, leading to carbon buildup. To maintain the insulating properties of the oil and reduce the probability of sparking and maintenance frequency, it is necessary to filter the insulating oil.

[0003] Existing methods for filtering insulating oil typically involve using a filter screen for simple filtration. Impurities may adhere to the surface of the filter screen, which can easily cause blockage of the oil passages. As a result, the filter components will fail quickly, leading to frequent equipment maintenance and low operating efficiency. Summary of the Invention

[0004] The main objective of this invention is to provide a filtration component and application device that addresses the problems of existing methods for filtering insulating oil, such as easy clogging of the oil path, high maintenance frequency, and low working efficiency.

[0005] To achieve the above objectives, the present invention provides a filtering assembly, comprising:

[0006] A housing having a through cavity, with an inlet and an outlet at its two ends, the cavity comprising a first part, a second part, and a third part connected in sequence, the inlet being located in the first part and the outlet being located in the third part, the second part comprising a main channel and a secondary channel, the two ends of the main channel and the two ends of the secondary channel being connected to the first part and the third part, respectively.

[0007] The filtration section includes a first filter element, an anti-backflow element, and a second filter element. The first filter element is installed at the end of the main channel that communicates with the first part, and the first filter element completely covers the end of the main channel that communicates with the first part and is spaced apart from the secondary channel. The anti-backflow element is installed in the secondary channel and is located near the end of the secondary channel that communicates with the first part. The second filter element is installed in the secondary channel and is located on the side of the anti-backflow element that is away from the first part. Both the anti-backflow element and the second filter element have flow channels formed inside them, and the size of the flow channel of the second filter element is smaller than the size of the flow channel of the anti-backflow element. Both the anti-backflow element and the second filter element completely cover the cross-section of the secondary flow channel. The anti-backflow element and the second filter element are spaced apart and a dirt storage cavity for storing impurities is formed between them.

[0008] Optionally, the housing includes an outer shell and a dividing ring installed inside the outer shell. The portion of the outer shell corresponding to the dividing ring and the dividing ring are both hollow cylindrical structures. The dividing ring forms the main channel, and the portion of the outer shell corresponding to the dividing ring and the dividing ring together form the secondary channel.

[0009] Optionally, the first filter element is a conical filter screen, with the large end of the conical filter screen installed at the end of the dividing ring facing the inlet end, and the small end of the conical filter screen extending towards the inlet end.

[0010] Optionally, the first filter element is made of metal, a high-voltage wire is connected to the first filter element, and a ground wire is connected to the housing, so that an electromagnetic field for dragging impurities is formed between the first filter element and the housing.

[0011] Optionally, the anti-backflow element is spaced apart from the first filter element.

[0012] Optionally, the filtering component further includes a drive unit disposed within the main channel.

[0013] Optionally, both the anti-backflow component and the second filter component are porous ceramic components.

[0014] Optionally,

[0015] The cross-sectional area of ​​the flow channel of the anti-backflow component along the direction perpendicular to the extension direction of the secondary channel is 2500 μm² to 70000 μm².

[0016] The cross-sectional area of ​​the flow channel of the second filter element along the direction perpendicular to the extension direction of the secondary channel is 10 μm² to 700 μm².

[0017] Optionally,

[0018] The cross-sectional area of ​​the end of the first part that connects to the second part gradually increases in the direction closer to the second part along the direction perpendicular to the extension direction of the first part;

[0019] The cross-sectional area of ​​the end of the third part that connects to the second part gradually decreases in the direction away from the second part along the direction perpendicular to the extension direction of the third part.

[0020] The present invention also proposes an application device, the application device including a cooling system, the cooling system including a fluid pipeline and a filter assembly as described above, the filter assembly being installed on the fluid pipeline.

[0021] In use, the filter assembly of this invention needs to be installed on the cooling circulation loop of the equipment. When the insulating oil in the cooling circulation loop flows to the filter assembly, the insulating oil containing impurities first enters the first part of the housing from the inlet end and flows along the first part to the second part. At this time, the insulating oil can enter the main channel or the secondary channel, while some impurities cannot enter the main channel due to the presence of the first filter element and will enter the secondary channel under the continuous impact of the insulating oil. Because the flow channel of the anti-backflow element is relatively large, the impurities entering the secondary channel will first pass through the flow channel of the anti-backflow element and enter the dirt storage chamber. Furthermore, the flow channel of the second filter element is relatively small, and the impurities cannot pass through, thus being blocked by the second filter element and remaining in the dirt storage chamber, thereby achieving the filtration of impurities. Compared to existing technologies that rely on screen filtration, the filter assembly of this invention utilizes a storage chamber for impurities, allowing for the storage of more impurities and reducing the likelihood of oil circuit blockage. Furthermore, the filter assembly separates the main channel for insulating oil flow from the secondary channel for impurity filtration. Even if the secondary channel accumulates a large amount of impurities, it will not affect the normal flow of insulating oil in the main channel, further reducing the possibility of blockage. This significantly extends the service life of the filter assembly, reduces maintenance frequency, and improves work efficiency. Additionally, by incorporating an anti-backflow component, even if the filter assembly encounters insulating oil backflow during use, the anti-backflow component can prevent most of the impurities stored in the storage chamber from flowing back to the first part of the housing, resulting in more stable and reliable impurity filtration. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1This is a schematic diagram of the structure of a filter component according to an embodiment of the present invention.

[0024] Explanation of icon numbers:

[0025] label name label name 100 Filtering components 14 shell 10 case 15 Segmentation ring 11 cavity 20 Filtration section 111 Part One 21 First filter element 112 Part Two 22 Anti-backflow components 1121 Main passage 23 Second filter element 1122 Secondary passage 24 Sewage storage chamber 113 Part Three 30 Drive components 12 Entry end 40 High-voltage power lines 13 Export end 50 ground wire The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture (as shown in the attached figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, in this invention, descriptions involving "first," "second," etc., 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" 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 invention according to the specific circumstances.

[0030] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible to those skilled in the art. If a combination of technical solutions contradicts each other or cannot be implemented, such a combination should be considered non-existent and not within the scope of protection claimed by the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0031] This invention provides a filter assembly 100, including a housing 10 and a filter section 20. The housing 10 has a through cavity 11, and the two ends of the housing 10 are an inlet end 12 and an outlet end 13, respectively. The cavity 11 includes a first part 111, a second part 112, and a third part 113 connected in sequence. The inlet end 12 is located in the first part 111, and the outlet end 13 is located in the third part 113. The second part 112 includes a main channel 1121 and a secondary channel 1122. The two ends of the main channel 1121 and the two ends of the secondary channel 1122 are respectively connected to the first part 111 and the third part 113. The filter section 20 includes a first filter element 21, an anti-backflow element 22, and a second filter element 23. The first filter element 21 is installed between the main channel 1121 and the first part 113. At one end of the main channel 1121 connected to the first part 111, the first filter element 21 fully covers the end of the main channel 1121 connected to the first part 111 and is spaced apart from the secondary channel 1122. The anti-backflow element 22 is installed in the secondary channel 1122 and is located near the end of the secondary channel 1122 connected to the first part 111. The second filter element 23 is installed in the secondary channel 1122 and is located on the side of the anti-backflow element 22 away from the first part 111. Both the anti-backflow element 22 and the second filter element 23 have flow channels, and the size of the flow channel of the second filter element 23 is smaller than the size of the flow channel of the anti-backflow element 22. Both the anti-backflow element 22 and the second filter element 23 fully cover the cross-section of the secondary flow channel. The anti-backflow element 22 and the second filter element 23 are spaced apart and a dirt storage cavity 24 for storing impurities is formed between them.

[0032] like Figure 1 As shown, the left end of the housing 10 is the inlet end 12, and the right end is the outlet end 13. The cavity 11 includes a first part 111, a second part 112, and a third part 113 connected sequentially from left to right. The first filter element 21 is installed at the left end of the main channel 1121, the anti-backflow element 22 is installed in the secondary channel 1122 near the left end, and the second filter element 23 is installed in the secondary channel 1122 to the right of the anti-backflow element 22.

[0033] It should be noted that this invention can be applied to filtering most fluids, including gases and liquids. The specific embodiments described here primarily use the filtration of insulating oil in the cooling circulation loop of oil-cooled equipment as an example, and do not imply that this invention is limited to filtering insulating oil. It is understood that the number of flow channels in the second filter element 23 and the number of flow channels in the anti-backflow element 22 can both be one or more, and the numbers can be the same or different; this embodiment of the invention does not impose any limitations on this.

[0034] When using the filter assembly 100 of this invention, it needs to be installed on the cooling circulation loop of the equipment. When the insulating oil in the cooling circulation loop flows to the filter assembly 100, the insulating oil containing impurities first enters the first part 111 of the housing 10 from the inlet end 12 and flows along the first part 111 to the second part 112. At this time, the insulating oil can enter the main channel 1121 or the secondary channel 1122, while some impurities cannot enter the main channel 1121 due to the presence of the first filter element 21, and will enter the secondary channel 1122 under the continuous impact of the insulating oil. Since the flow channel of the anti-backflow element 22 is relatively large, the impurities entering the secondary channel 1122 will first pass through the flow channel of the anti-backflow element 22 and enter the dirt storage chamber 24. Furthermore, the flow channel of the second filter element 23 is relatively small, and the impurities cannot pass through, thus being blocked by the second filter element 23 and remaining in the dirt storage chamber 24, thereby achieving the filtration of impurities. Compared to existing technologies that use filters, the filter assembly 100 of this invention, by providing a storage chamber 24 for storing impurities, can hold more impurities, reducing the possibility of oil circuit blockage. Furthermore, the filter assembly 100 separates the main channel 1121, primarily for the flow of insulating oil, from the secondary channel 1122, primarily for filtering impurities. Even if the secondary channel 1122 contains a large amount of impurities, it will not affect the normal flow of insulating oil in the main channel 1121, further reducing the possibility of oil circuit blockage. This significantly extends the service life of the filter assembly 100, reduces the frequency of equipment maintenance, and improves work efficiency. In addition, by providing an anti-backflow component 22, even if the filter assembly 100 encounters insulating oil backflow during use, the anti-backflow component 22 can prevent most of the impurities stored in the storage chamber 24 from flowing back to the first part 111 of the housing 10, making the filtration of impurities more stable and reliable.

[0035] In one embodiment, the housing 10 includes an outer shell 14 and a dividing ring 15 installed within the outer shell 14. The portion of the outer shell 14 corresponding to the dividing ring 15 and the dividing ring 15 itself are both hollow cylindrical structures. The dividing ring 15 forms a main channel 1121, and the portion of the outer shell 14 corresponding to the dividing ring 15 and the dividing ring 15 together form a secondary channel 1122. It is understood that the portion of the outer shell 14 corresponding to the dividing ring 15 and the dividing ring 15 itself are both hollow cylindrical structures; that is, the main channel 1121 is cylindrical, and the secondary channel 1122 is an annular structure surrounding the main channel 1121. The annular structure of the secondary channel 1122 surrounding the main channel 1121 facilitates the easy flow of impurities to the secondary channel 1122 under various usage angles, thereby improving the reliability of the filter assembly 100 of the present invention. Specifically, the outer shell 14 and the dividing ring 15 can be manufactured using a one-piece molding technique. The dividing ring 15 and the outer shell 14 can be connected by at least one connecting block to allow the dividing ring 15 to be installed inside the outer shell 14.

[0036] Furthermore, the first filter element 21 is a conical filter screen. The large end of the conical filter screen is installed at the end of the dividing ring 15 facing the inlet end 12, and the small end of the conical filter screen extends towards the inlet end 12. Because the first filter element 21 is conical, when the insulating oil flows through it at a certain speed, liquid reflection occurs, carrying away contaminants and air bubbles adhering to the first filter element 21, preventing clogging and ensuring the unobstructed flow of the main channel 1121. Moreover, the liquid pressure generated by the reflection facilitates the insulating oil carrying impurities into the secondary channel 1122, further improving the reliability of the filter assembly 100 of this invention. Specifically, the conical filter screen can be snapped onto the inner edge of the left end of the dividing ring 15, and / or, the conical filter screen can be adhered to the left end of the dividing ring 15 to achieve the installation of the conical filter screen.

[0037] In one embodiment, the first filter element 21 is made of metal, and a high-voltage wire 40 is connected to the first filter element 21, while a ground wire 50 is connected to the outer casing 14, so that an electromagnetic field for dragging conductive impurities is formed between the first filter element 21 and the outer casing 14. The high-voltage wire 40 connected to the first filter element 21 and the ground wire 50 connected to the outer casing 14 create a voltage difference between them, thereby generating an electromagnetic field. Under the action of the electromagnetic field, long, strip-shaped conductive impurities such as carbon filaments will arrange themselves along the electric field lines, thus achieving the dragging effect of the electromagnetic field on the conductive impurities, making them less likely to enter the main channel 1121 from the first filter element 21. Since the conductive impurities are perpendicular to the flow direction of the fluid entering the secondary channel 1122, the conductive impurities will be impacted by the fluid and enter the secondary channel 1122 instead of the main channel 1121, improving the filtration effect and thus improving the reliability of the filter assembly 100 of the present invention.

[0038] It should be noted that the fluidity of insulating oil is crucial to the cooling effect of the application equipment; the better the fluidity of the insulating oil, the better the cooling effect on the application equipment. Understandably, the larger the pore size of the filter element's mesh, the less impact it has on the fluidity of the insulating oil. The filter assembly 100 of this invention reduces the possibility of impurities entering the main channel 1121 from the first filter element 21 by creating an electromagnetic field between the first filter element 21 and the outer shell 14 to drag conductive impurities. This allows for an increase in the pore size of the first filter element 21, reducing its obstruction of the insulating oil flow, thus improving the fluidity of the insulating oil and resulting in better cooling of the application equipment.

[0039] Furthermore, the anti-backflow element 22 is spaced apart from the first filter element 21. Understandably, due to the drag of the electromagnetic field, conductive impurities will arrange themselves along the electric field lines. By spaced the anti-backflow element 22 from the first filter element 21, the conductive impurities are freed from the influence of the electromagnetic field before entering the anti-backflow element 22. Consequently, under the influence of fluid flow, they transform into a flow-friendly posture, facilitating the passage of conductive impurities through the anti-backflow element 22 into the dirt storage chamber 24, further improving the reliability of the filter assembly 100 of this invention.

[0040] In one embodiment, the filter assembly 100 further includes a drive member 30 disposed within the main channel 1121. The drive member 30, installed within the main channel 1121, provides oil circulation power to the filter assembly 100. By adjusting the rotational speed of the drive member 30, the flow rate within the main channel 1121 can be adjusted within a wide range, thereby affecting the partial pressure and flow rate of oil in the main channel 1121 and the secondary channel 1122. By switching the operating speed of the drive member 30, the flow of oil under both cooling circulation conditions and non-circuitous conditions can be considered. Under operating conditions, the drive member 30 operates at a higher speed, with most of the oil flowing through the main channel 1121 to ensure cooling efficiency; while under non-circuitous conditions, the drive member 30 operates at a lower speed or even in reverse, allowing a higher proportion of oil to flow through the secondary channel 1122, thus filtering out more impurities. By setting the drive component 30 to adjust the flow rate in the main channel 1121 and the secondary channel 1122 as needed, greater flexibility and convenience are achieved. This enables more efficient collection of impurities in the oil without affecting normal operation. The design is simple and ingenious, improving the applicability of the filter assembly 100 of this invention. Specifically, the drive component 30 can be a liquid pump or a fan as in the prior art, and the choice of whether to use a liquid pump or a fan depends on the fluid to be filtered.

[0041] In one embodiment, both the anti-backflow component 22 and the second filter component 23 are porous ceramic components. Porous ceramic components have advantages such as high temperature resistance, high pressure resistance, insulation, and long service life.

[0042] Furthermore, the cross-sectional area of ​​the flow channel of the anti-backflow element 22 along the direction perpendicular to the extension direction of the secondary channel 1122 is 2500 μm² to 70000 μm², and the cross-sectional area of ​​the flow channel of the second filter element 23 along the direction perpendicular to the extension direction of the secondary channel 1122 is 10 μm² to 700 μm². The vertical cross-sectional area of ​​the anti-backflow element 22, at 2500 μm² to 70000 μm², effectively allows impurities to pass through, but also blocks impurities stored in the dirt storage chamber 24 when insulating oil backflow occurs. The vertical cross-sectional area of ​​the second filter element 23, at 10 μm² to 700 μm², effectively screens and filters impurities flowing into the dirt storage chamber 24, improving the reliability of the filter assembly 100 of this invention.

[0043] In one embodiment, the cross-sectional area of ​​the end of the first portion 111 that connects to the second portion 112 gradually increases in the direction close to the second portion 112; the cross-sectional area of ​​the end of the third portion 113 that connects to the second portion 112 gradually decreases in the direction away from the second portion 112. The vertical cross-sectional area of ​​the right end of the first portion 111 gradually increases to the right, and the vertical cross-sectional area of ​​the left end of the third portion 113 gradually decreases to the right. It is understood that, under constant flow conditions, a larger cross-sectional area results in a lower flow velocity; conversely, a smaller cross-sectional area results in a higher flow velocity. When the insulating oil enters the second portion 112, the reduced flow velocity facilitates the entry of more insulating oil into the secondary channel 1122, enabling better filtration of the insulating oil. When the insulating oil leaves the second portion 112, the increased flow velocity ensures normal operation and improves the reliability of the filter assembly 100 of the present invention.

[0044] The present invention also proposes an application device, which includes a cooling system comprising a fluid pipeline and a filter assembly 100 as described above, the filter assembly 100 being installed on the fluid pipeline. The specific structure of this application device is as described in the above embodiments. Since this application device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. Specifically, the application device can be an X-ray source.

[0045] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A filter assembly, characterized in that, include: A housing having a through cavity, with an inlet and an outlet at its two ends, the cavity comprising a first part, a second part, and a third part connected in sequence, the inlet being located in the first part and the outlet being located in the third part, the second part comprising a main channel and a secondary channel, the two ends of the main channel and the two ends of the secondary channel being connected to the first part and the third part, respectively. The filtration section includes a first filter element, an anti-backflow element, and a second filter element. The first filter element is installed at the end of the main channel that communicates with the first part, and the first filter element completely covers the end of the main channel that communicates with the first part and is spaced apart from the secondary channel. The anti-backflow element is installed in the secondary channel and is located near the end of the secondary channel that communicates with the first part. The second filter element is installed in the secondary channel and is located on the side of the anti-backflow element that is away from the first part. Both the anti-backflow element and the second filter element have flow channels formed inside them, and the size of the flow channel of the second filter element is smaller than the size of the flow channel of the anti-backflow element. Both the anti-backflow element and the second filter element completely cover the cross-section of the secondary channel. The anti-backflow element and the second filter element are spaced apart and a dirt storage cavity for storing impurities is formed between them.

2. The filter assembly as described in claim 1, characterized in that, The housing includes an outer shell and a dividing ring installed inside the outer shell. The portion of the outer shell corresponding to the dividing ring and the dividing ring are both hollow cylindrical structures. The dividing ring forms the main channel, and the portion of the outer shell corresponding to the dividing ring and the dividing ring together form the secondary channel.

3. The filter assembly as described in claim 2, characterized in that, The first filter element is a conical filter screen, with the large end of the conical filter screen installed at the end of the dividing ring facing the inlet end, and the small end of the conical filter screen extending towards the inlet end.

4. The filter assembly as described in claim 3, characterized in that, The first filter element is made of metal and is connected to a high-voltage wire. The outer casing is connected to a ground wire so that an electromagnetic field for dragging impurities is formed between the first filter element and the outer casing.

5. The filter assembly as described in claim 4, characterized in that, The anti-backflow component is spaced apart from the first filter component.

6. The filter assembly as described in any one of claims 1 to 5, characterized in that, The filtering assembly also includes a drive unit disposed within the main channel.

7. The filter assembly as described in any one of claims 1 to 5, characterized in that, Both the anti-backflow component and the second filter component are porous ceramic parts.

8. The filter assembly as claimed in claim 7, characterized in that, The cross-sectional area of ​​the flow channel of the anti-backflow component along the direction perpendicular to the extension direction of the secondary channel is 2500 μm² to 70000 μm². The cross-sectional area of ​​the flow channel of the second filter element along the direction perpendicular to the extension direction of the secondary channel is 10 μm² to 700 μm².

9. The filter assembly as described in any one of claims 1 to 5, characterized in that, The cross-sectional area of ​​the end of the first part that connects to the second part gradually increases in the direction closer to the second part along the direction perpendicular to the extension direction of the first part; The cross-sectional area of ​​the end of the third part that connects to the second part gradually decreases in the direction away from the second part along the direction perpendicular to the extension direction of the third part.

10. An application device, characterized in that, The application device includes a cooling system, which includes fluid lines and a filter assembly as described in any one of claims 1 to 9, the filter assembly being installed on the fluid lines.

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