Filtration system

Abstract

The utility model discloses a filtering system. The filtering system comprises a filter and a collecting tank, the filter is used for filtering liquid to be filtered, the collecting tank is used for collecting filtered liquid filtered by the filter, the filter comprises a container, a cover body and a filter element, a cavity is formed in the container, the filter element is contained in the cavity, the container is provided with an opening through which the filter element can enter and exit, and the cover body seals the opening. The container is further provided with an inlet and an outlet which are communicated with the cavity, the inlet is connected with the inflow pipe, the outlet is connected with the outflow pipe, the inflow pipe is connected with a first valve mechanism, the first valve mechanism is configured to be capable of switching between a first communication mode and a second communication mode, air enters the inlet through the inflow pipe in the first communication mode, and air enters the outlet through the outflow pipe in the second communication mode. To-be-filtered liquid enters the inlet through the inflow pipe. According to the filtering system, the filter element can be replaced after the filter is emptied, and the leakage probability of filtered liquid in the filter element replacement process is reduced.

Description

Technical Field

[0001] The present application relates to the field of filtration technology, and in particular to a filtration system. Background Art

[0002] In the production fields of metallurgy, electricity, petroleum, papermaking, battery manufacturing, etc., there is a need for filtration, and the filter is an indispensable equipment in the filtration process. After the filter has been running for a period of time, the impurities intercepted by the filter element accumulate on the surface of the filter element, which not only increases the filtration pressure but also reduces the filtration efficiency. Therefore, the filter element needs to be replaced in time to maintain the high filtration efficiency of the filter element.

[0003] However, when replacing the filter element, the filter element needs to be removed from the filtered liquid. The filtered liquid is very likely to leak into the external environment along with the filter element, which, on the one hand, causes chemical pollution to the external environment; on the other hand, it may cause the operator to come into contact with the filtered liquid, which may cause potential harm to the operator's health. Therefore, how to improve the leakage of filtered liquid during the filter element replacement process is one of the problems that the industry needs to solve urgently. Utility Model Content

[0004] In order to solve the above technical problems, the present application provides a filtering system that can improve the leakage of filtered liquid during filter element replacement.

[0005] An embodiment of the present application provides a filtering system, including a filter and a collecting tank, wherein the filter is used to filter a liquid to be filtered, and the collecting tank is used to collect the filtered liquid after being filtered by the filter, the filter includes a container, a cover body and a filter element, a cavity is provided in the container, the filter element is accommodated in the cavity, the container is provided with an opening through which the filter element can enter and exit, the cover body closes the opening, and the container is also provided with an inlet and an outlet connected to the cavity, the inlet is connected to an inlet pipe, the outlet is connected to an outflow pipe, and a first valve mechanism is connected to the inlet pipe, the first valve mechanism is configured to be switchable between a first connection mode and a second connection mode, in the first connection mode, air enters the inlet via the inlet pipe, and in the second connection mode, the liquid to be filtered enters the inlet via the inlet pipe.

[0006] In the embodiment of the present application, since the inflow pipe is connected to the first valve mechanism, the first valve mechanism is configured to be able to switch between the liquid to be filtered and the air. Therefore, when the first valve mechanism is switched to filter the liquid, the filtered liquid enters the filter and is filtered by the filter element to meet the filtering requirements; when the first valve mechanism is switched to air, the liquid in the filter can be emptied, and the filter element can be replaced after emptying, thereby reducing the probability of leakage of the filtered liquid during the replacement of the filter element. Since the outflow pipe is respectively connected to the filter and the collection tank, during the filtering process and the emptying process, the liquid filtered by the filter can be collected in the collection tank, which is helpful for the centralized treatment of the liquid.

[0007] In some embodiments, the first valve mechanism includes at least two valve inlets and one valve outlet, and the filtration system also includes a liquid tank capable of providing the liquid to be filtered and a compressed air tank capable of providing the air, the liquid tank and the compressed air tank are respectively connected to the valve inlets of the first valve mechanism, and the inlet of the container is connected to the valve outlet.

[0008] Thus, the liquid to be filtered enters the first valve mechanism from the liquid tank, and is controlled by the first valve mechanism to enter the filter for filtration. The air enters the first valve mechanism from the compressed air tank, and is controlled by the first valve mechanism to enter the filter for emptying the liquid.

[0009] In some embodiments, the first valve mechanism comprises a three-way valve.

[0010] Since the first valve mechanism includes a three-way valve, switching between the liquid to be filtered and the air can be achieved.

[0011] In some embodiments, the filtration system further comprises a differential pressure gauge, wherein measuring ends of the differential pressure gauge are respectively connected to the inlet and the outlet of the container, and are used to measure the pressure difference on both sides of the filter element.

[0012] Since the measuring ends of the differential pressure gauge are respectively located at the inlet and outlet on both sides of the filter element, the differential pressure gauge can measure the pressure difference on both sides of the filter element, thereby judging the blockage condition of the filter element according to the pressure difference value. Replacing the filter element in time according to the blockage condition of the filter element helps to maintain efficient filtration.

[0013] In some embodiments, the cover body includes a covering portion and a sealing portion, the sealing portion is arranged on a side of the covering portion close to the filter element, the sealing portion is in contact with the inner wall surface of the container, the edge of the covering portion is configured with a radially protruding protrusion, the inner wall surface of the container close to the opening is configured with a slide groove, the protrusion can slide along the slide groove and be limited by the slide groove, and when the cover body closes the opening, the protrusion of the covering portion is accommodated in the slide groove, wherein the extension direction of the slide groove is parallel or inclined to the circumference of the container.

[0014] Since the sealing part fits the inner wall surface of the container, the sealing part and the cavity are closed through surface contact, which has a strong sealing effect. Since the cover part can cover the opening, the cover part cooperates with the sealing part to cover the opening and the gap between the sealing part and the inner wall of the cavity, thereby enhancing the sealing effect and reducing the risk of liquid leaking from the opening during the filtration process. Since the slide groove can limit the protrusion in the slide groove, on the one hand, the sealing effect of the cover body on the cavity is enhanced, reducing the risk of liquid leaking from the opening during the filtration process; on the other hand, the cover body can resist the pressure inside the cavity and is not easy to detach, which helps to enhance the stability of the seal.

[0015] In some embodiments, the slide groove is arranged around the inner wall surface of the container; along the circumference, the slide groove has a first groove end and a second groove end, and the end of the container close to the opening is constructed with a notch connected to the slide groove, and the notch is connected to the first groove end, and the protrusion can be inserted into the slide groove through the notch and the first groove end.

[0016] Thus, the notch can guide the protrusion from the opening into the slide groove, so that the cover body is pressed into the cavity, which helps to enhance the sealing between the cover body and the inner wall surface of the container.

[0017] In some embodiments, a limiting portion is provided at the second groove end of the slide groove, and the limiting portion is provided at the groove bottom of the slide groove along a radial protrusion, and the limiting portion can prevent the protrusion from sliding out of the slide groove.

[0018] Since a limiting portion is provided at the second groove end, and the limiting portion protrudes from the groove bottom of the slide groove, the protrusion is blocked by the limiting portion after sliding along the slide groove and cannot slide to the first groove end, so that the protrusion is not easy to detach from the notch after sliding, thereby ensuring the firmness of the connection between the cover body and the container.

[0019] In some embodiments, a plurality of the slide grooves and a plurality of the notches are provided along the inner wall surface of the container, and the slide grooves and the notches are alternately arranged.

[0020] Thus, each notch guides the protrusion from the opening into each slide groove, so that the peripheral side of the cover body is evenly limited, so that the cover body is evenly pressed into the cavity, which helps to enhance the sealing between the cover body and the inner wall surface of the container.

[0021] In some embodiments, a first sealing ring is disposed between the sealing portion and the inner wall surface of the container, and the first sealing ring is located closer to the filter element than the protrusion.

[0022] Thereby, the sealing effect between the sealing portion and the inner wall surface of the container is enhanced.

[0023] In some embodiments, along the direction of gravity, the opening is arranged on the upper side of the container, and the outlet is arranged on the lower side of the container.

[0024] Since the outlet is located at the lower side of the container, on the one hand, the filtered liquid can leave the cavity from the outlet under the action of gravity, and the discharge speed is accelerated; on the other hand, the situation where the liquid volume accumulates at the bottom of the container is improved, and the amount of liquid remaining in the cavity is reduced. Since the opening is located at the upper side of the container, the liquid at the opening is prone to dripping, making it difficult for the liquid to remain at the opening, which helps to reduce the amount of liquid leaking from the opening when the filter element is removed.

[0025] In some embodiments, the bottom wall of the container protrudes into the cavity to form a cylindrical wall, the cylindrical wall has a channel connected to the outlet, and a first insertion portion is provided on the side of the filter element close to the cylindrical wall, the first insertion portion has a channel connected to the interior of the filter element, the radial inner wall surface of the cylindrical wall is connected to the radial outer wall surface of the first insertion portion, and the channel in the cylindrical wall is connected to the channel in the first insertion portion.

[0026] Since the inner wall surface of the cylindrical wall is connected to the outer wall surface of the first insertion part, the channel in the cylindrical wall is connected to the channel in the first insertion part. Therefore, on the one hand, the cylindrical wall can limit the first insertion part, so that the position of the filter in the container is maintained stable, which helps to improve the filtering effect; on the other hand, it is difficult for the liquid to be filtered to flow out from the gap between the cylindrical wall and the first insertion part, which helps to reduce the situation where the liquid to be filtered flows out without being filtered, thereby improving the filtering effect.

[0027] In some embodiments, a second sealing ring is disposed between the radial inner wall surface of the cylindrical wall and the radial outer wall surface of the first insertion portion.

[0028] As a result, it is difficult for the liquid to be filtered to flow out from the gap between the cylindrical wall and the first insertion portion, which helps to reduce the situation where the liquid to be filtered flows out without being filtered, thereby improving the filtering effect.

[0029] In some embodiments, the cover body and the filter element are engaged with each other through an engaging assembly.

[0030] Thus, the cover body and the filter element are detachably connected. On the one hand, the filter element can be taken out with the cover body, so that the operator does not need to touch the filter element when taking out the filter element, thereby reducing the probability of the operator contacting the filtered liquid; on the other hand, only the filter element needs to be replaced without replacing the cover body, which can reduce the structure that needs to be replaced and thus help reduce costs.

[0031] In some embodiments, the snap-fit ​​assembly includes a snap-fit ​​groove and a second insertion portion. The snap-fit ​​groove is provided on the side of the cover body facing the cavity, and the second insertion portion is provided on the side of the filter element close to the cover body. The second insertion portion is interference fit in the snap-fit ​​groove.

[0032] Thus, the second insertion part is inserted into the engaging groove and engaged with the engaging groove by interference fit, and the second insertion part can be pulled out from the engaging groove. This plug-in structure is simple to operate, easy to use, and helps to quickly replace the filter element.

[0033] In some embodiments, a handle is provided on a side of the cover away from the cavity.

[0034] Thus, the cover can be easily rotated and pulled out through the handle, which is convenient for operators to use.

[0035] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0037] Figure 1 A perspective view of a filtration system provided for some embodiments of the present application;

[0038] Figure 2 A schematic diagram of a filtration system provided for some embodiments of the present application;

[0039] Figure 3 A three-dimensional exploded view of a filter provided for some embodiments of the present application;

[0040] Figure 4 A perspective view of a container portion of a filter provided for some embodiments of the present application;

[0041] Figure 5 A perspective view of a cover of a filter provided in some embodiments of the present application;

[0042] Figure 6 A side view of a filter provided for some embodiments of the present application;

[0043] Figure 7 For this application Figure 6The cross-sectional view along the AA direction;

[0044] Figure 8 For this application Figure 7 A partial enlarged view of part B.

[0045] Description of Reference Numerals

[0046] 100, filter; 200, collecting tank; 300, inflow pipe; 400, outflow pipe; 500, first valve mechanism; 600, second valve mechanism; 700, differential pressure gauge; 10, container; 101, inlet; 102, outlet; 103, opening; 104, slide groove; 105, notch; 106, limit portion; 107, cylindrical wall; 11, cover body; 111, capping portion; 112, sealing portion; 113, protrusion; 114, engaging groove; 12, filter element; 121, first insertion portion; 122, second insertion portion; 13, first sealing ring; 14, second sealing ring; 15, handle; Z, axial direction of the container. DETAILED DESCRIPTION

[0047] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions.

[0049] In the description of the embodiments of the present application, the technical terms "first", "second", "third", "fourth", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0050] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0051] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0052] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", and "circumferential" are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0053] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0054] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0055] Below, this application is described in detail.

[0056] In the production fields of metallurgy, electricity, petroleum, papermaking, battery manufacturing, etc., there is a need for filtration, and the filter is an indispensable equipment in the filtration process. After the filter has been running for a period of time, the impurities intercepted by the filter element accumulate on the surface of the filter element, which not only increases the filtration pressure but also reduces the filtration efficiency. Therefore, the filter element needs to be replaced in time to maintain the high filtration efficiency of the filter element.

[0057] However, when replacing the filter element, the filter element needs to be removed from the filtered liquid. If there is still a large amount of filtered liquid in the filter element, the filtered liquid is very likely to leak (splash) into the external environment with the filter element, causing chemical pollution to the external environment on the one hand; on the other hand, the operator may be exposed to the filtered liquid, which may cause potential harm to the operator's health. Therefore, how to improve the leakage of filtered liquid during the filter element replacement process is one of the problems that the industry needs to solve urgently.

[0058] The present application provides a filtering system that can improve the leakage of filtered liquid during the filter element replacement process. According to research, when replacing the filter element, if the liquid in the filter element can be drained as much as possible before the filter element is removed, the risk of liquid leakage or liquid splashing when the filter element is removed can be reduced.

[0059] Based on such a design concept, the inventor of the present application designed a filtering system including a filter and a collecting tank. The filter is used to filter the liquid to be filtered, and the collecting tank is used to collect the filtered liquid after being filtered by the filter. The filter includes a container, a cover body and a filter element. A cavity is provided in the container, and the filter element is accommodated in the cavity. The container is provided with an opening through which the filter element can enter and exit, and the cover body closes the opening. The container is also provided with an inlet and an outlet connected to the cavity, the inlet is connected to the inlet pipe, and the outlet is connected to the outflow pipe. A first valve mechanism is connected to the inlet pipe, and the first valve mechanism is configured to be switchable between a first connection mode and a second connection mode. In the first connection mode, air enters the inlet via the inlet pipe, and in the second connection mode, the liquid to be filtered enters the inlet via the inlet pipe.

[0060] Since the inflow pipe is connected to the first valve mechanism, the first valve mechanism is configured to switch between the liquid to be filtered and the air. Therefore, when the first valve mechanism is switched to filter the liquid, the filtered liquid enters the filter and is filtered by the filter element to meet the filtering requirements; when the first valve mechanism is switched to air, the liquid in the filter can be emptied, and the filter element can be replaced after emptying, thereby reducing the probability of leakage of the filtered liquid during the replacement of the filter element. Since the outflow pipe is respectively connected to the filter and the collection tank, during the filtering process and the emptying process, the liquid filtered by the filter can be collected in the collection tank, which is helpful for the centralized treatment of the liquid.

[0061] In the embodiment of the present application, the filter may be the filter provided in the embodiment of the present application, and the filter element part thereof may be a filter element that can be purchased on the market.

[0062] In the embodiment of the present application, the inflow pipe and the outflow pipe may be the same pipe or different pipes.

[0063] The collection tank can be used to collect the filtered liquid and can also be used as a container for subsequent processing equipment.

[0064] The following is a detailed description with reference to the accompanying drawings.

[0065] Figure 1 A perspective view of a filtration system provided for some embodiments of the present application; Figure 2 A schematic diagram of a filtration system provided for some embodiments of the present application; Figure 3 A three-dimensional exploded view of a filter provided for some embodiments of the present application; Figure 4 A perspective view of a container portion of a filter provided for some embodiments of the present application;

[0066] Figure 5 A perspective view of a cover of a filter provided in some embodiments of the present application; Figure 6 A side view of a filter provided for some embodiments of the present application; Figure 7 For this application Figure 6 The cross-sectional view along the AA direction; Figure 8 For this application Figure 7 A partial enlarged view of part B.

[0067] like Figures 1 to 6 As shown, an embodiment of the present application provides a filtering system, including a filter 100 and a collecting tank 200, the filter 100 is used to filter a liquid to be filtered, the collecting tank 200 is used to collect the filtered liquid after being filtered by the filter 100, the filter 100 includes a container 10, a cover body 11 and a filter element 12, a cavity is provided in the container 10, the filter element 12 is accommodated in the cavity, the container 10 is provided with an opening 103 through which the filter element can enter and exit, the cover body closes the opening 103, the container 10 is also provided with an inlet 101 and an outlet 102 connected to the cavity, the inlet 101 is connected to the inlet pipe 300, the outlet 102 is connected to the outflow pipe 400, the inlet pipe 300 is connected to a first valve mechanism 500, the first valve mechanism 500 is configured to be switchable between a first connection mode and a second connection mode, in the first connection mode, air enters the inlet via the inlet pipe 300, and in the second connection mode, the liquid to be filtered enters the inlet 101 via the inlet pipe 300.

[0068] The filtration system includes a filter 100 and a collection tank 200. The filter 100 is connected to an inflow pipe 300 and an outflow pipe 400 respectively. The filter 100 and the collection tank 200 are communicated through the outflow pipe 400.

[0069] The filter 100 includes a detachable filter element, which is located between the flow path of the liquid from the inlet pipe 300 to the outlet pipe 400. The liquid to be filtered enters the filter 100 from the inlet pipe 300, and leaves the filter 100 from the outlet pipe 400 after being filtered by the filter element. Specifically, the filter 100 has a cavity, and the cavity is used to hold the liquid. The filter 100 has at least three through holes connected to the cavity, which are respectively used to connect the inlet pipe 300, the outlet pipe 400 and replace the filter element.

[0070] Specifically, if Figure 3 and Figure 6 As shown, the filter 100 comprises: a container 10, a cavity is provided in the container 10, and the container 10 is provided with an inlet 101, an outlet 102 and an opening 103 which are connected to the cavity; a cover 11, the cover 11 is detachably connected to the container 10, and covers the opening 103; a filter element 12, the filter element 12 is arranged in the cavity between the inlet 101 and the outlet 102. The filter element 12 and the cover 11 can be connected to each other or can be independent of each other. Optionally, the filter element 12 and the cover 11 are detachably connected.

[0071] The container 10 has a cavity inside, and the container 10 is provided with an inlet 101, an outlet 102 and an opening 103 penetrating through the wall of the container 10, so that the inlet 101, the outlet 102 and the opening 103 are connected to the cavity respectively. The inlet 101 is used to connect to the inflow pipe 300, and the liquid to be filtered can enter the cavity from the inlet 101. The outlet 102 is used to connect to the outflow pipe 400, and the filtered liquid flows out of the cavity from the outlet 102. Optionally, the setting height of the inlet 101 is higher than the setting height of the outlet 102. The filter element 12 enters the cavity through the opening 103.

[0072] The filter element 12 is located between the inlet 101 and the outlet 102. The filter element 12 may have a filter screen, and the liquid is filtered after passing through the filter screen. Optionally, the filter element 12 is arranged close to the inlet 101, and the filter element 12 extends axially from the inlet 101 to the opening 103, and one axial end is connected to the cover body 11. The liquid enters from the inlet 101 and flows out after passing through the filter screen of the filter element 12, and the liquid filtered by the filter element 12 leaves the cavity from the outlet 102. Also optionally, the filter element 12 is arranged close to the outlet 102, and the filter element 12 extends axially from the outlet 102 to the opening 103, and one axial end is connected to the cover body 11. The liquid enters the cavity from the inlet 101, and flows out from the outlet 102 after passing through the filter screen of the filter element 12, thereby filtering the liquid.

[0073] In some embodiments, Figure 7As shown, the filter element 12 is arranged in the container 10, and a gap for liquid flow is left between the filter element 12 and the inner peripheral wall of the container 10. The filter element 12 is configured in a cylindrical shape, and there is a liquid holding space inside the filter element 12. The filter mesh on the filter element 12 connects the holding space with the gap. The liquid to be filtered can enter the gap between the filter element 12 and the inner peripheral wall of the container 10 from the inlet 101, and then enter the liquid holding space inside the filter element 12 through the filter mesh of the filter element 12. The filter element 12 has a liquid outlet at the bottom, for example, which is connected to the outlet 102 of the container 10, and the filtered liquid flows out of the filter element 12 and flows out of the container 10 through the outlet 102. It should be noted that in the container 10, two independent liquid storage areas can be included, one is connected to the inlet 101 and the gap between the filter element 12 and the inner peripheral wall of the container 10, and the other is connected to the outlet 102 and the liquid holding space inside the filter element 12 (details will be described later).

[0074] The filter net of the filter element 12 can be constructed as a single layer or multiple layers according to the filtering requirements, and the mesh number of the filter net can also be selected according to the filtering requirements, such as 100 mesh, 200 mesh, etc. This application does not impose any special restrictions on the number of layers and mesh number of the filter element 12.

[0075] In some embodiments, Figure 3 As shown, the cover 11 is detachably connected to the container 10, and the cover 11 can cover the opening 103 when connected to the container 10. The cover 11 is also detachably connected to the filter element 12. In actual use, the cover 11 is connected to the container 10 and covers the opening 103, and the filter element 12 is connected to the cover 11 and blocks between the inlet 101 and the outlet 102. When replacing the filter element 12, the cover 11 is removed from the container 10, the filter element 12 is taken out with the cover 11, and then the filter element 12 is removed from the cover 11, and a new filter element 12 is installed on the cover 11. The cover 11 covers the opening 103, and the new filter element 12 extends into the cavity through the opening 103 and blocks between the inlet 101 and the outlet 102.

[0076] like Figure 1 and Figure 2 As shown, one end of the inflow pipe 300 is connected to the inlet 101 of the filter 100, and the other end of the inflow pipe 300 is connected to the first valve mechanism 500. The first valve mechanism 500 has three flow paths, one of which is connected to the inflow pipe 300, and the other two flow paths are used to circulate air and the liquid to be filtered, respectively. The flow path connected to the inflow pipe 300 can be connected to only one of the other two flow paths, and the first valve mechanism 500 can switch any one of the other two flow paths to communicate with the flow path connected to the inflow pipe 300.

[0077] One end of the outflow pipe 400 is connected to the outlet 102 of the filter 100, and the other end of the outflow pipe 400 is connected to the collection tank 200. The collection tank 200 has a storage space, and the filtered liquid enters the storage space from the outflow pipe 400. Optionally, the outflow pipe 400 is inclined relative to the horizontal plane, and the end close to the filter 100 is higher than the end close to the collection tank 200. Optionally, the collection tank 200 is provided with an exhaust valve.

[0078] In actual use, the liquid to be filtered flows through the first valve mechanism 500 from the inlet pipe 300 into the filter 100, and the filtration is completed after flowing through the filter element. The filtered liquid enters the collection tank 200 from the outlet pipe 400. When the filter element needs to be replaced, the first valve mechanism 500 is switched to allow air to enter the filter 100 from the inlet pipe 300, and the air discharges the residual liquid in the filter 100 from the outlet pipe 400 into the collection tank 200. When the liquid in the filter 100 is almost exhausted or the liquid level is separated from the filter element, the filter element is removed and a new filter element is installed in the filter 100. After the installation is completed, the first valve mechanism 500 is switched to allow the liquid to be filtered to re-enter the filter 100, and the liquid to be filtered discharges the air into the collection tank 200.

[0079] In the embodiment of the present application, since the inflow pipe 300 is connected to the first valve mechanism 500, the first valve mechanism 500 is configured to be able to switch between the liquid to be filtered and the air, therefore, when the first valve mechanism 500 is switched to filter the liquid, the filtered liquid enters the filter 100 and is filtered by the filter element to meet the filtering requirements; when the first valve mechanism 500 is switched to air, the liquid in the filter 100 can be emptied, and the filter element can be replaced after emptying, thereby reducing the probability of leakage of the filtered liquid during the replacement of the filter element. Since the outflow pipe 400 is respectively connected to the filter 100 and the collection tank 200, during the filtering process and the emptying process, the liquid filtered by the filter 100 can be collected by the collection tank 200, which is helpful for the centralized treatment of the liquid.

[0080] In some embodiments, see Figure 1 and Figure 2 The filtering system further includes a second valve mechanism 600 , which is disposed on the outflow pipe 400 .

[0081] The filtration system further includes a second valve mechanism 600 . The second valve mechanism 600 is disposed on the outflow pipe 400 .

[0082] The second valve mechanism 600 includes a one-way valve, a bottom valve and a pressure reducing valve. The specific type of the second valve mechanism 600 can be selected according to actual control requirements. This application does not impose any special limitation on the specific type of the second valve mechanism 600.

[0083] Thus, the second valve mechanism 600 can control the flow of the filtered liquid in the outflow pipe 400 .

[0084] In some embodiments, the first valve mechanism 500 includes at least two valve inlets and one valve outlet, and the filtration system also includes a liquid tank capable of providing liquid to be filtered and a compressed air tank capable of providing air, the liquid tank and the compressed air tank are respectively connected to the valve inlets of the first valve mechanism 500, and the inlet 101 of the container 10 is connected to the valve outlet.

[0085] The first valve mechanism 500 includes at least two valve inlets and one valve outlet. The valve outlet is communicated with only one valve inlet, and the valve inlet communicated with the valve outlet can be switched.

[0086] The filtration system further includes a liquid tank and a compressed air tank. The liquid tank is used to contain the liquid to be filtered, and is communicated with a valve inlet of the first valve mechanism 500 to provide the liquid to be filtered to the inlet pipe 300 through the first valve mechanism 500 .

[0087] The compressed air tank is used to contain compressed air, and is connected to another valve inlet of the first valve mechanism 500 to provide compressed air to the inlet pipe 300 through the first valve mechanism 500. The pressure value provided by the compressed air tank needs to be greater than the pressure difference value on both sides of the filter element 12 when the filter element is blocked.

[0088] Thus, the liquid to be filtered enters the first valve mechanism 500 from the liquid tank, and is controlled by the first valve mechanism 500 to enter the filter 100 for filtration. The air enters the first valve mechanism 500 from the compressed air tank, and is controlled by the first valve mechanism 500 to enter the filter 100 for emptying the liquid.

[0089] In some embodiments, the first valve mechanism 500 comprises a three-way valve.

[0090] Since the first valve mechanism 500 includes a three-way valve, switching between the liquid to be filtered and the air can be achieved.

[0091] In some embodiments, the filtration system further includes a differential pressure gauge 700 , the measuring ends of which are respectively connected to the inlet 101 and the outlet 102 of the container 10 , for measuring the pressure difference on both sides of the filter element 12 .

[0092] The filtration system also includes a differential pressure gauge 700. The measuring ends of the differential pressure gauge 700 are respectively arranged on both sides of the filter element 12, such as the inlet 101 and the outlet 102 of the container 10, for measuring the pressure difference on both sides of the filter element 12, so as to determine the blockage of the filter element 12. Exemplarily, the pressure difference value measured by the differential pressure gauge 700 reaches 150kpa to 200kpa, which means that the filter element 12 is blocked and needs to be replaced. The compressed air tank provides air with a pressure of not less than 500kpa to discharge the liquid.

[0093] The filtration system may further include a programmable logic controller (PLC). The first valve mechanism 500 is configured as a three-way valve, and the second valve mechanism 600 is configured as a normally open one-way valve. The programmable logic controller is electrically connected to the differential pressure gauge 700.

[0094] The programmable logic controller obtains the pressure difference value, determines that the pressure difference value is greater than or equal to the blockage value, and then issues an alarm. The operator switches the three-way valve to allow air to enter the filter 100. After a period of time, such as 1 minute, the old filter element is removed and a new filter element is installed. The three-way valve is switched to allow the liquid to be filtered to enter the filter 100. The programmable logic controller obtains the pressure difference value, determines that the pressure difference value is less than the blockage value, and then does not respond.

[0095] The blockage value may be any value within the range of 150 kPa to 200 kPa.

[0096] In an optional embodiment, the first valve mechanism 500 is configured as an air-controlled three-way valve. The PLC is electrically connected to the air-controlled three-way valve and the pressure differential gauge 700, respectively. The PLC obtains the pressure differential value, and when it determines that the pressure differential value is greater than or equal to the blockage value, an alarm is issued. The operator can issue an instruction to the PLC to control the switching of the air-controlled three-way valve to allow air to enter the filter 100. After a period of time, the liquid in the filter 100 is emptied and the filter element is replaced. An instruction is issued to the PLC to control the switching of the air-controlled three-way valve to allow the liquid to be filtered to enter the filter 100. The PLC obtains the pressure differential value, and when it determines that the pressure differential value is less than the blockage value, there is no response.

[0097] Since the measuring ends of the differential pressure gauge 700 are respectively arranged at the inlet 101 and the outlet 102 located on both sides of the filter element 12, the differential pressure gauge 700 can measure the pressure difference on both sides of the filter element 12, so as to judge the blockage condition of the filter element 12 according to the pressure difference value. Replacing the filter element 12 in time according to the blockage condition of the filter element 12 helps to maintain efficient filtration.

[0098] In some embodiments, Figure 5 As shown, the cover body 11 includes a covering portion 111 and a sealing portion 112 for covering the opening 103. The sealing portion 112 is arranged on a side of the covering portion 111 close to the filter element 12. The sealing portion 112 is in contact with the inner wall surface of the container 10. The edge of the covering portion 111 is configured with a radially protruding protrusion 113. The inner wall surface of the container 10 close to the opening 103 is configured with a slide groove 104. The protrusion 113 can slide along the slide groove 104 and be limited by the slide groove 104. When the cover body 11 closes the opening 103, the protrusion 113 of the covering portion 111 is accommodated in the slide groove 104, wherein the extension direction of the slide groove 104 is parallel to or inclined to the circumferential direction of the container 10.

[0099] The cover body 11 includes a cover portion 111 and a sealing portion 112. Along the axial direction Z of the container, the projection of the opening 103 is located in the cover portion 111, and the cover portion 111 can cover the opening 103. The container 10 has a plane near the opening 103 to block the cover portion 111 from entering the cavity. Optionally, the cover portion 111 fits with the edge of the container 10 near the opening 103, and the edge is perpendicular to the inner wall surface of the container 10. A sealing ring can be provided between the cover portion 111 and the edge surface of the container 10 to improve the sealing performance of the cover body 11 to the opening 103.

[0100] The sealing portion 112 is disposed on one side of the sealing portion 111 close to the opening 103, and protrudes toward the cavity relative to the sealing portion 111. The surface of the sealing portion 112 is in contact with the inner wall surface of the container 10. The container 10 can be configured in a cylindrical shape, a prismatic shape, etc., and the sealing portion 112 is configured according to the shape of the inner wall surface of the container 10. In an optional embodiment, the container 10 is configured in a cylindrical shape, and the sealing portion 112 is configured in an annular shape to achieve contact between the sealing portion 112 and the inner wall surface of the container 10.

[0101] In some embodiments, threads matching each other may be constructed on the surface of the sealing portion 112 and the inner wall surface of the container 10, so that the sealing portion 112 and the container 10 are detachably connected through the threads. Specifically, matching threads are constructed on the surface of the sealing portion 112 and the inner wall surface of the container 10. The sealing portion 112 is inserted into the container 10, and the cover 11 is twisted in one direction so that the threads are engaged with each other to achieve the connection between the cover 11 and the container 10. Twisting the cover 11 in another direction can disconnect the connection between the cover 11 and the container 10, and the cover 11 can be taken out from the opening 103.

[0102] In some embodiments, a protrusion 113 protruding outward is constructed on the radial edge of the cover portion 111 . A plurality of protrusions 113 may be provided. Optionally, the plurality of protrusions 113 are evenly distributed on the radial edge of the cover portion 111 .

[0103] Corresponding to the protrusion 113, a slide groove 104 is constructed on the inner wall surface of the container 10. The slide groove 104 has surfaces separated from each other, and the extension direction of the surface is the extension direction of the slide groove 104. The protrusion 113 slides between the two surfaces and is limited. The extension direction of the slide groove 104 has an angle or is parallel to the cover body 11. The angle can be 10 degrees, 25 degrees, 150 degrees, etc., which is not an angle of 90 degrees. The protrusion 113 extends into the slide groove 104, so that the cover body 11 is limited in the axial direction Z of the container. The slide groove 104 can be constructed to be recessed toward the inner wall surface of the container 10, and can also be constructed to protrude from the inner wall surface of the container 10.

[0104] In a specific embodiment, a plurality of chutes 104 are constructed on the inner wall surface of the container 10. Each chute 104 is parallel and independent. The extension direction of the chute 104 has an angle relative to the circumference of the container, and the degree of the angle can be 10 degrees, 20 degrees, 150 degrees, etc., which are not 90 degrees. One end of the chute 104 starts from the edge of the container 10 close to the cover body 11 and is connected to the outside world. This end is regarded as the first groove end of the chute 104, and the other end is regarded as the second groove end of the chute 104. The first groove end of the chute 104 is arranged in a one-to-one correspondence with the protrusion 113, so that each protrusion 113 can enter the corresponding chute 104 from the first groove end of the chute 104. In the process of the protrusion 113 moving from the first groove end to the second groove end along the chute 104, the protrusion 113 drives the cover body 11 to be gradually pressed against the cavity.

[0105] Since the sealing part 112 is in contact with the inner wall of the container 10, the sealing part 112 and the cavity are sealed by surface contact, which has a strong sealing effect. Since the cover part 111 can cover the opening 103, the cover part 111 cooperates with the sealing part 112 to cover the opening 103 and the gap between the sealing part 112 and the inner wall of the cavity, thereby enhancing the sealing effect and reducing the risk of liquid leaking from the opening 103 during the filtration process. Since the slide groove 104 can limit the protrusion 113 in the slide groove 104, on the one hand, the sealing effect of the cover body 11 on the cavity is enhanced, and the risk of liquid leaking from the opening 103 during the filtration process is reduced; on the other hand, the cover body 11 can resist the pressure inside the cavity and is not easy to detach, which helps to enhance the stability of the seal.

[0106] In some embodiments, see Figure 4 and Figure 5 As shown, the slide groove 104 is arranged around the inner wall surface of the container 10; along the circumferential direction, the slide groove 104 has a first groove end and a second groove end, and the end of the container 10 close to the opening 103 is constructed with a notch 105 connected to the slide groove 104, the notch 105 is connected to the first groove end, and the protrusion 113 can be inserted into the slide groove 104 through the notch 105 and the first groove end.

[0107] A notch 105 is formed at the end of the container 10 near the opening 103. The notch 105 extends axially from the edge of the container 10 near the opening 103 to the slide groove 104, one end of the notch 105 is connected to the outside, and the other end of the notch 105 is connected to the slide groove 104. The notch 105 is arranged corresponding to the protrusion 113, so that the protrusion 113 can be inserted into the notch 105 and enter the slide groove 104 through the notch 105.

[0108] In an optional embodiment, a plurality of slide grooves 104 are constructed on the inner wall surface of the container 10. Each slide groove 104 is independent of each other, and the extension direction of the slide groove 104 is at an angle or parallel to the circumference of the container 10. The end of the slide groove 104 close to the opening 103 is regarded as the first groove end of the slide groove 104, and the end of the slide groove 104 away from the opening 103 is regarded as the second groove end of the slide groove 104. A recess 105 is constructed on the inner wall surface of the container 10, and the recess 105 is connected to the first groove end of the slide groove 104. The protrusion 113 enters the slide groove 104 from the notch 105, and in the process of moving from the first groove end to the second groove end along the slide groove 104, the protrusion 113 drives the cover body 11 to be gradually pressed against the cavity.

[0109] Thus, the notch 105 can guide the protrusion 113 to enter the slide groove 104 , so that the cover body 11 is pressed into the cavity, which helps to enhance the sealing between the cover body 11 and the inner wall surface of the container 10 .

[0110] In some embodiments, Figure 4 As shown, a limiting portion 106 is provided at the second groove end of the slide groove 104 . The limiting portion 106 protrudes radially and is provided at the groove bottom of the slide groove 104 . The limiting portion 106 can prevent the protrusion 113 from sliding out of the slide groove 104 .

[0111] The chute 104 is arranged around the inner wall surface of the container 10, and multiple sections of the chute 104 are arranged in a circumferential direction. A limiting portion 106 is arranged in the chute 104, and the limiting portion 106 can be arranged close to the notch 105. At least one limiting portion 106 is arranged, and along the axial direction Z of the container, the projection of the notch 105 is located outside the limiting portion 106.

[0112] The limiting portion 106 may be an inclined surface or a curved surface that gradually protrudes radially as it moves away from the first groove end along the circumferential direction relative to the bottom surface of the slide groove 104. As the protrusion 113 rotates in the slide groove 104, the cover body 11 and the slide groove 104 are gradually locked.

[0113] In some embodiments, there are multiple notches 105 and at least one limiting portion 106. In the clockwise direction or counterclockwise direction, each position on the chute 104 that is connected to the notch 105 is regarded as the first chute end, and the position adjacent to the first chute end is regarded as the second chute end. A limiting portion 106 is set at at least one second chute end. The protrusion 113 enters the first chute end from the notch 105 and moves in one direction along the chute 104 until it moves to the limiting portion 106 and is limited, so that the protrusion 113 cannot move along the chute 104 to the adjacent notch 105 and release the connection. The protrusion 113 moves from the limiting portion 106 to the other direction and returns to the notch 105, and the limiting of the protrusion 113 by the chute 104 is released, and the protrusion 113 leaves the notch 105.

[0114] Since the second groove end is provided with a limiting portion 106, and the limiting portion 106 protrudes from the groove bottom of the slide groove 104, the protrusion 113 is blocked by the limiting portion 106 after sliding along the slide groove 104 and cannot slide to the first groove end, so that the protrusion 113 is not easy to detach from the notch 105 after sliding, thereby ensuring the firmness of the connection between the cover body 11 and the container 10.

[0115] In some embodiments, a plurality of slide grooves 104 and a plurality of notches 105 are provided along the inner wall surface of the container 10 , and the slide grooves 104 and the notches 105 are alternately arranged.

[0116] In a specific embodiment, a plurality of chutes 104 are provided along the inner wall of the container 10, a notch 105 is provided corresponding to the first end of each chute 104, and a stopper 106 is provided for the second end of each chute 104. The protrusion 113 enters the first end of the chute from the notch 105, moves in one direction along the chute 104, and moves to the second end of the chute 104 and is stopped. The protrusion 113 moves in another direction from the stopper 106 and returns to the notch 105, the stopper 104 on the protrusion 113 is released, and the protrusion 113 leaves the notch 105.

[0117] Thus, each notch 105 guides the protrusion 113 from the opening 103 into each slide groove 104 , so that the circumference of the cover body 11 is evenly limited, so that the cover body 11 is evenly pressed into the cavity, which helps to enhance the sealing between the cover body 11 and the inner wall of the container 10 .

[0118] In some embodiments, Figure 5 and Figure 8 As shown, a first sealing ring 13 is disposed between the sealing portion 112 and the inner wall surface of the container 10 , and the first sealing ring 13 is located closer to the filter element 12 than the protruding portion 113 .

[0119] A plurality of first sealing rings 13 can be provided according to sealing effects and sealing requirements.

[0120] The first sealing ring 13 can be made of materials such as EPDM rubber, fluorosilicone rubber, and hydrogenated nitrile rubber. The present application does not impose any special limitation on the material of the first sealing ring 13.

[0121] The first sealing ring 13 may be a V-shaped sealing ring, a U-shaped sealing ring, an O-shaped sealing ring, a Y-shaped sealing ring, etc. The present application does not impose any special limitation on the specific structure of the first sealing ring 13 .

[0122] As a result, the sealing effect between the sealing portion 112 and the inner wall surface of the container 10 is enhanced.

[0123] In some embodiments, Figure 3As shown, along the direction of gravity, the opening 103 is arranged on the upper side of the container 10, and the outlet 102 is arranged on the lower side of the container 10.

[0124] Along the direction of gravity, the opening 103 is arranged on the upper side of the container 10. The opening 103 can be arranged on the top of the container 10, or on the side wall of the container 10 near the top. The outlet 102 is arranged on the lower side of the container 10. The outlet 102 can be arranged on the bottom of the container 10, or on the side wall of the container 10 near the bottom. The inlet 101 can be arranged at any position of the container 10, and optionally, the inlet 101 is arranged on the side wall of the container 10.

[0125] In some embodiments, the opening 103 is provided at the top of the container 10, the outlet 102 is provided at the bottom of the container 10, and the inlet 101 is provided at the side wall of the container 10. The filter element 12 extends into the cavity from the opening 103 and covers the outlet 102 of the container 10. The liquid to be filtered enters the cavity from the inlet 101 and flows out from the outlet 102 after passing through the filter element 12.

[0126] Since the outlet 102 is disposed at the lower side of the container 10, on the one hand, the filtered liquid can leave the cavity from the outlet 102 under the action of gravity, and the discharge speed is accelerated; on the other hand, the situation where the liquid accumulates at the bottom of the container 10 is improved, and the amount of liquid remaining in the cavity is reduced. Since the opening 103 is disposed at the upper side of the container 10, the liquid at the opening 103 is prone to dripping, making it difficult for the liquid to remain at the opening 103, which helps to reduce the amount of liquid leaking from the opening 103 when the filter element 12 is removed.

[0127] In some embodiments, Figure 7 As shown, the bottom wall of the container 10 protrudes into the cavity to form a cylindrical wall 107, and the cylindrical wall 107 has a channel connected to the outlet 102. A first insertion portion 121 is provided on the side of the filter element 12 close to the cylindrical wall 107. The first insertion portion 121 has a channel connected to the interior of the filter element 12, and the radial inner wall surface of the cylindrical wall 107 is connected to the radial outer wall surface of the first insertion portion 121, and the channel in the cylindrical wall 107 is connected to the channel in the first insertion portion 121.

[0128] The cylindrical wall 107 communicated with the outlet 102 is constructed, and the cylindrical wall 107 protrudes from the inner wall of the container 10 toward the cavity. The filter element 12 is constructed with a first insertion portion 121 protruding along its own axial direction. The cylindrical wall 107 and the first insertion portion 121 can be constructed in a tubular shape.

[0129] Optionally, the first insertion portion 121 is inserted into the cylindrical wall 107, and the inner wall surface of the cylindrical wall 107 fits the outer wall surface surrounding the first insertion portion 121. Also optionally, the cylindrical wall 107 is inserted into the first insertion portion 121, and the inner wall surface of the first insertion portion 121 fits the outer wall surface surrounding the cylindrical wall 107.

[0130] In some embodiments, the filter screen of the filter element 12 is configured as a cylindrical cavity, one side of the filter element 12 is connected to the cover body 11, and the other side of the filter element 12 is provided with a first insertion portion 121, and the first insertion portion 121 is communicated with the interior of the cavity of the filter element 12. The liquid to be filtered enters the cavity of the container 10 from the inlet 101, passes through the filter screen and enters the cavity of the filter element 12, and flows out through the first insertion portion 121 and the cylindrical wall 107.

[0131] Since the inner wall surface of the cylindrical wall 107 is connected to the outer wall surface of the first insertion part 121, the channel in the cylindrical wall 107 is connected to the channel in the first insertion part 121. Therefore, on the one hand, the cylindrical wall 107 can limit the first insertion part 121, so that the position of the filter 100 in the container 10 is maintained stable, which helps to improve the filtering effect; on the other hand, it is difficult for the liquid to be filtered to flow out from the gap between the cylindrical wall 107 and the first insertion part 121, which helps to reduce the situation where the liquid to be filtered flows out without being filtered, thereby improving the filtering effect.

[0132] In some embodiments, see Figure 7 A second sealing ring 14 is provided between the radial inner wall surface of the cylindrical wall 107 and the radial outer wall surface of the first insertion portion 121 .

[0133] A plurality of second sealing rings 14 can be provided according to sealing effects and sealing requirements.

[0134] The second sealing ring 14 can be made of EPDM rubber, fluorosilicone rubber, hydrogenated nitrile rubber and the like. The present application does not impose any special limitation on the material of the second sealing ring 14 .

[0135] The second sealing ring 14 can be a V-shaped sealing ring, a U-shaped sealing ring, an O-shaped sealing ring, a Y-shaped sealing ring, etc. The present application does not impose any special limitation on the specific structure of the second sealing ring 14.

[0136] As a result, it is difficult for the liquid to be filtered to flow out from the gap between the cylindrical wall 107 and the first insertion portion 121 , which helps to reduce the situation where the liquid to be filtered flows out without being filtered, thereby improving the filtering effect.

[0137] In some embodiments, Figure 7 and Figure 8 As shown, the cover body 11 and the filter element 12 are engaged with each other through an engaging assembly.

[0138] The cover 11 and the filter element 12 can be connected by a snap-fit ​​assembly, or can be connected by threads, or can be connected by pins. The present application does not impose any special restrictions on the specific form of the detachable connection between the cover 11 and the filter element 12.

[0139] Thus, the cover body 11 and the filter element 12 are detachably connected. On the one hand, the filter element 12 can be taken out along with the cover body 11, so that the operator does not need to touch the filter element 12 when taking out the filter element 12, thereby reducing the probability of the operator contacting the filtered liquid. On the other hand, only the filter element 12 needs to be replaced without replacing the cover body 11, which can reduce the structure that needs to be replaced and thus help reduce costs.

[0140] In some embodiments, Figure 8 As shown, the snap-fit ​​assembly includes a snap-fit ​​groove 114 and a second insert portion 122 . The snap-fit ​​groove 114 is provided on the side of the cover body 11 facing the cavity, and the second insert portion 122 is provided on the side of the filter element 12 close to the cover body 11 . The second insert portion 122 is interference fit in the snap-fit ​​groove 114 .

[0141] The snap-fit ​​assembly includes a snap-fit ​​groove 114 and a second insertion portion 122. The snap-fit ​​groove 114 is arranged on a side of the cover body 11 close to the cavity, and the second insertion portion 122 is arranged on a side of the filter element 12 close to the cover body 11. The snap-fit ​​groove 114 and / or the second insertion portion 122 are made of a deformable material, such as rubber or plastic. Optionally, the snap-fit ​​groove 114 is arranged on a side of the filter element 12 close to the cover body 11, and the second insertion portion 122 is arranged on a side of the cover body 11 close to the cavity.

[0142] The width of the second insertion portion 122 is slightly larger than the width of the engaging groove 114, and the second insertion portion 122 can be inserted into the engaging groove 114. When the second insertion portion 122 is inserted into the engaging groove 114, the engaging groove 114 and / or the second insertion portion 122 are deformed, and the engaging groove 114 is squeezed from all sides to the middle, so that the second insertion portion 122 is fixed in the engaging groove 114.

[0143] In an optional embodiment, the radial dimension of the engaging groove 114 gradually decreases from the side close to the cover body 11 to the side away from the cover body 11, so as to be configured in a tapered shape, so that the further the second insertion portion 122 is inserted into the engaging groove 114, the greater the pressure it is subjected to.

[0144] In another optional embodiment, the edge of the engaging groove 114 close to the cavity is configured with a first protrusion facing the radial center, and the edge of the second inserting portion 122 close to the cover body 11 is configured with a second protrusion facing radially outward, and the radial dimension of the first protrusion is smaller than the radial dimension of the second protrusion. The first protrusion deforms and passes through the second protrusion to enter the engaging groove 114, and the second protrusion limits the first protrusion in the axial direction Z of the container.

[0145] In yet another optional embodiment, matching threads are provided on the surfaces of the protrusion 113 and the engaging groove 114 , and the protrusion 113 and the engaging groove 114 rotate relative to each other to achieve connection or separation of the protrusion 113 and the engaging groove 114 .

[0146] Since the second inserting portion 122 and the engaging groove 114 are engaged with each other after the second inserting portion 122 or the engaging groove 114 is deformed, the plug-in structure is easy to operate and convenient to use, and is conducive to the rapid replacement of the filter element 12 .

[0147] In some embodiments, Figure 3 , Figures 5 to 8 As shown, a handle 15 is provided on the side of the cover body 11 away from the cavity.

[0148] A handle 15 is provided on the side of the cover 11 away from the cavity, and the operator can hold the handle 15 to rotate the cover 11, thereby removing the cover 11 from the opening 103 or fixing the cover 11 to the container 10. After the cover 11 is removed, the cover 11 and the filter element 12 can also be taken out from the opening 103 by the handle 15.

[0149] Thus, the cover 11 can be easily rotated and pulled out by the handle 15, which is convenient for operators to use.

[0150] A specific embodiment of the present application is described below.

[0151] Before the filter element expires, the PLC system will issue an early warning based on the alarm value of the differential pressure gauge 700, informing personnel that the filter element 12 needs to be replaced.

[0152] The operator switches the pneumatic three-way valve (PLC controls the action of the pneumatic three-way valve), opens the gas circuit and closes the electrolyte inlet 101 at the same time, and the compressed air empties the electrolyte in the clogged filter 100 and flows into the electrolyte tank (collection tank 200) through the one-way valve. The one-way valve can prevent the electrolyte from flowing back.

[0153] The operator unscrews the cover 11 of the filter 100 by the handle and takes out the cover 11 together with the filter element 12 (the filter element 12 is fixedly connected to the cover 11 of the filter 100 by threads), then unscrews the filter element 12, replaces the new filter element 12 and puts it into the cylinder (cavity) of the filter 100, and then screws on the cover 11 of the filter 100 until it hits the limit part 106 in the cylinder slide groove 104 and stops. At this time, the cover 11 of the filter 100 is sealed with the container 10 by a sealing ring to ensure that the electrolyte does not overflow from here.

[0154] The personnel switches the air-controlled three-way valve with one button operation, opens the electrolyte inlet and closes the air circuit at the same time, and the electrolyte discharges the air in the filter 100. At this time, the electrolyte will refill the filter 100 and be discharged to the electrolyte tank (collection tank 200), the differential pressure gauge 700 returns to normal indication, the alarm is eliminated, and the system resumes normal operation.

[0155] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way.

Claims

1. A filtration system, characterized in that: It comprises a filter and a collection tank, wherein the filter is used to filter the liquid to be filtered, and the collection tank is used to collect the filtered liquid after being filtered by the filter. The filter comprises a container, a cover and a filter element. The container is provided with a cavity, the filter element is accommodated in the cavity, the container is provided with an opening through which the filter element can enter and exit, and the cover closes the opening. The container is also provided with an inlet and an outlet connected to the cavity, the inlet is connected to the inlet pipe, the outlet is connected to the outflow pipe, the inlet pipe is connected to a first valve mechanism, the first valve mechanism is configured to be switchable between a first connection mode and a second connection mode, in the first connection mode, air enters the inlet via the inlet pipe, and in the second connection mode, the liquid to be filtered enters the inlet via the inlet pipe.

2. The filtration system according to claim 1, characterized in that: The first valve mechanism comprises at least two valve inlets and one valve outlet, The filtration system further comprises a liquid tank capable of providing the liquid to be filtered and a compressed air tank capable of providing the air, wherein the liquid tank and the compressed air tank are respectively connected to the valve inlet of the first valve mechanism, and the inlet of the container is connected to the valve outlet.

3. The filtration system according to claim 2, characterized in that: The first valve mechanism includes a three-way valve.

4. The filtration system according to claim 1, characterized in that: The filtration system also includes a differential pressure gauge, the measuring ends of which are respectively connected to the inlet and the outlet of the container, for measuring the pressure difference on both sides of the filter element.

5. The filtration system according to claim 2, characterized in that: The filtration system also includes a differential pressure gauge, the measuring ends of which are respectively connected to the inlet and the outlet of the container, for measuring the pressure difference on both sides of the filter element.

6. The filtration system according to any one of claims 1 to 5, characterized in that: The cover body includes a cover portion and a sealing portion, wherein the sealing portion is arranged on a side of the cover portion close to the filter element, and the sealing portion is in contact with the inner wall surface of the container. The edge of the cover portion is configured with a radially protruding protrusion, and the inner wall surface of the container close to the opening is configured with a slide groove, along which the protrusion can slide and be limited by the slide groove, and when the cover body closes the opening, the protrusion of the cover portion is accommodated in the slide groove. Wherein, the extending direction of the slide groove is parallel to or inclined to the circumferential direction of the container.

7. The filtration system according to claim 6, characterized in that: The slide groove is arranged around the inner wall surface of the container; along the circumference, the slide groove has a first groove end and a second groove end, The end of the container close to the opening is configured with a notch communicated with the slide slot, the notch is connected to the first slot end, and the protrusion can be inserted into the slide slot through the notch and the first slot end.

8. The filtration system according to claim 7, characterized in that: A limiting portion is arranged at the second groove end of the slide groove, and the limiting portion is arranged to protrude radially at the groove bottom of the slide groove, and the limiting portion can prevent the protrusion from sliding out of the slide groove.

9. The filtration system according to claim 8, characterized in that: A plurality of the slide grooves and a plurality of the notches are arranged along the inner wall surface of the container, and the slide grooves and the notches are arranged alternately.

10. The filtration system according to claim 6, characterized in that: A first sealing ring is arranged between the sealing portion and the inner wall surface of the container, and the first sealing ring is located closer to the filter element than the protruding portion.

11. The filtration system according to any one of claims 1 to 5, characterized in that: Along the direction of gravity, the opening is arranged on the upper side of the container, and the outlet is arranged on the lower side of the container.

12. The filtration system according to claim 11, characterized in that: The bottom wall of the container protrudes into the cavity to form a cylindrical wall, and the cylindrical wall has a channel connected to the outlet. The filter element is provided with a first insertion portion on one side close to the cylindrical wall, wherein the first insertion portion has a channel communicating with the interior of the filter element. The radial inner wall surface of the cylindrical wall is connected to the radial outer wall surface of the first inserting portion, and the channel in the cylindrical wall is communicated with the channel in the first inserting portion.

13. The filtration system according to claim 12, characterized in that: A second sealing ring is disposed between the radial inner wall surface of the cylindrical wall and the radial outer wall surface of the first insertion portion.

14. The filtration system according to any one of claims 1 to 5, characterized in that: The cover body and the filter element are clamped together through a clamping assembly.

15. The filtration system according to claim 14, characterized in that: The clamping assembly comprises a clamping groove and a second insertion portion. The clamping groove is provided on a side of the cover body facing the cavity, and the second insertion portion is provided on a side of the filter element close to the cover body. The second insertion portion is interference-fitted into the engagement groove.

16. The filtration system according to any one of claims 1 to 5, characterized in that: A handle is provided on one side of the cover away from the cavity.

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