Filtering equipment

Abstract

A pressing body, a sealing support and a driving piece are arranged at the position, corresponding to a mounting groove, of a first base, and a filtering assembly is associated with the sealing support through the pressing body, so that when the filtering assembly is mounted in a shell and a connector is in butt joint with the mounting groove, the connector presses the pressing body downwards, and the driving piece drives the pressing body to rotate; the sealing support is separated from the bottom of the mounting groove, and an upstream pipeline and a downstream pipeline in the first base can be communicated with the interior of the mounting groove and an inlet / outlet of the filtering assembly, so that liquid can be introduced; when the filter assembly is moved out of the first base, the filter assembly does not press the pressing body downwards, the sealing support moves upwards under the action of the driving part, the groove bottom of the mounting groove can be sealed quickly, and therefore liquid in the first base and an external pipeline cannot be sprayed upwards through the mounting groove, and the problem that material liquid overflows from the first base is solved; the waste of the feed liquid and the pollution to the use environment are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering, in particular to a filtering device. Background Art

[0002] JP2002336848A discloses a water purifier, in which a plate-shaped cover body that can be opened from the outside to the inside and on one side is arranged at the inner end of the inlet of the capsule filter element, and at the same time, a ball valve is arranged at the outlet of the shell of the capsule filter element. When the capsule filter element is not installed in the shell, the ball valve closes the outlet of the shell of the capsule filter element, and the liquid inside the capsule filter element cannot flow out through the outlet; when the capsule filter element is installed in the shell, the rod-shaped supporting component of the shell, i.e., the ejector pin, pushes the ball valve upward to open the outlet, and the purified water can be discharged through the outlet. In the process of disassembling the used capsule filter element, the ball valve is no longer affected by the ejector pin of the shell, and the ball valve closes the outlet, and the liquid cannot flow out from the outlet, which can prevent the residual water in the capsule filter element from overflowing from the inlet or outlet when the capsule filter element is taken out from the shell.

[0003] Specifically, in this technical solution, the ball valve is fixedly connected to one end of a spring positioned in the filter element joint. After the filter element and the capsule shell are assembled, the ball valve is positioned at the outlet of the capsule shell and closes the outlet. When the ejector pin of the shell pushes the ball valve upward, the spring is compressed and shortened, and the ball valve moves upward and separates from the outlet of the capsule shell, thereby opening the outlet.

[0004] The capsule filter element is installed in a shell, which includes a cylinder and a base. The inlet and outlet of the shell, that is, the inlet and outlet of the base, are respectively connected to the upstream and downstream pipelines in a sealed manner for liquid flow. Usually, the flow channel pressure in the base will be higher than the pressure on the capsule filter element side. For example, since the pressure of the inlet is usually higher than the pressure of the outlet, there is residual pressure inside the base in a short period of time when the liquid inlet is stopped. Under the action of this residual pressure, the residual liquid on the inlet side will also be sprayed upward from the slot connected to the inlet to the outside of the base. In addition, in the pipelines of some users, there is a situation where the height of the downstream pipeline end is higher than the base, and the height difference is relatively large. Correspondingly, the pressure of the downstream pipeline will be higher than the pressure at the slot corresponding to the capsule filter element in the base. Then, after disconnecting the liquid inlet of the upstream pipeline, at the moment when the used capsule filter element is taken out from the base of the shell, under the action of the pressure difference between the downstream pipeline and the slot corresponding to the capsule filter element in the base, the residual liquid in the base of the shell will be sprayed upward from the slot corresponding to the capsule filter element in the base, that is, the liquid will be sprayed upward from the slot connected to the outlet to the outside of the base, causing pollution and liquid waste.

[0005] Therefore, it is necessary to improve the structure of the base of the shell to solve the problem that when there is a large height difference between the downstream pipeline and the base of the filter, the residual liquid in the base is sprayed upward from the slot connected to the outlet at the moment the capsule filter element is removed from the base; or to solve the problem that the residual liquid in the base and on the inlet side is sprayed upward from the slot connected to the inlet. Summary of the invention

[0006] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a filtering device, which solves the problem that in the prior filtering device, when the capsule filter element is removed from the base, the residual liquid in the base is sprayed upward from the slot connected to the outlet. Alternatively, the residual liquid in the base and on the inlet side is sprayed upward from the slot connected to the inlet.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A filtering device comprises a housing and a filtering assembly installed therein, wherein the housing comprises a first cylinder and a first base forming a detachable sealed connection, and the filtering assembly has at least one joint;

[0009] The first base has a mounting groove for sealingly inserting the joint of the filter assembly, and the bottom of the mounting groove is through;

[0010] A sealing support, a pressing body and a driving member are provided in the first base at a position corresponding to the mounting groove;

[0011] The pressing body includes a pressing portion and a connecting rod connected as one body, and has a first through portion connected to the inside of the joint, the pressing portion is axially movable in the mounting groove, and its radial outer end can be axially pressed by the joint of the filter assembly; the pressing body is connected to the axial upper end of the sealing support through the connecting rod;

[0012] The driving member is located on a side of the sealing support away from the pressing body, and can exert an axial upward pushing effect on the sealing support;

[0013] When the filter assembly is installed in the housing, the joint of the filter assembly exerts an axial downward pressing effect on the pressing portion, thereby pushing the pressing body and the sealing support to synchronously move axially downward and reach the first position of the sealing support, and the sealing support is located axially below the corresponding mounting groove and separated from the groove bottom of the mounting groove, thereby conducting the groove bottom of the mounting groove;

[0014] When at least part of the joint is moved out of the mounting groove, the driving member exerts an axial upward pushing force on the sealing support, thereby pushing the sealing support and the pressing body to move axially upward synchronously and reach the second working position of the sealing support, and the sealing support seals the bottom of the mounting groove.

[0015] The filter device of the utility model is provided with a pressing body, a sealing support and a driving member at a position of the first base corresponding to the mounting groove. The pressing body includes a pressing part and a connecting rod connected to each other, and a first through-portion connected to the inside of the joint. The pressing part cooperates with the joint of the filter assembly, and its radial outer end can be axially pressed by the joint of the filter assembly to bear the axial downward pressure of the joint. The pressing part can be axially movably arranged in the mounting groove. At the same time, the mounting groove also generates a radial limit on the pressing part to ensure that the pressing part moves along the axis in the mounting groove. The function of the first through-portion is to provide a channel for the liquid to flow through the pressing body; the pressing portion is connected to the axial upper end of the sealing support through a connecting rod to transmit the axial force applied to the pressing portion to the sealing support; the function of the sealing support is to seal the through-portion bottom of the mounting groove, and under the axial downward pressing action of the pressing portion and the joint, the sealing support is pushed away from the mounting groove, thereby connecting the joint and the flow channel inside the first base; the function of the driving member is to apply an axial upward force to the sealing support so that it can approach the bottom of the mounting groove and seal it.

[0016] Therefore, the filter device of the utility model uses a pressing body to associate the filter assembly with the sealing support. When the filter assembly is installed inside the housing, its joint is inserted into the installation groove, and the pressing body is pressed down. The sealing support moves downward axially with the pressing body and separates from the bottom of the installation groove. The sealing support reaches its first position and conducts the bottom of the installation groove, so that the external pipeline can be connected through the bottom of the installation groove, the first through-hole and the joint of the filter assembly, and liquid can be passed;

[0017] When the filter assembly is removed from the first base, that is, when at least part of the joint is removed from the mounting groove, the filter assembly no longer presses down on the pressing body, and the sealing support moves axially upward under the action of the driving member, which can quickly seal the bottom of the mounting groove, so that the liquid in the first base and below the bottom of the groove cannot spray upward through the mounting groove, thus solving the problem of liquid spraying upward in the first base, avoiding waste of liquid and pollution of the use environment, and having good anti-spraying effect and easy operation.

[0018] In a specific embodiment, the pressing portion is a straight-line rod-shaped structure, the first through-portion is located on both sides of the straight-line rod-shaped structure, one end of the connecting rod is connected to the straight-line rod-shaped structure, and the other end of the connecting rod passes through the bottom of the mounting groove and is connected to the axial upper end of the sealing support. The pressing portion has a simple structure and is easy to process.

[0019] In another specific embodiment, the pressing portion includes a plurality of straight rods distributed radially, each of the straight rods is cross-connected at the center, the first through portion is located between adjacent straight rods, one end of the connecting rod is connected to at least one straight rod, and the other end of the connecting rod passes through the bottom of the mounting groove and is connected to the axial upper end of the sealing support. The pressing portion has a simple structure, is easy to process, has a larger contact area with the joint, and is more stable to press;

[0020] In another specific embodiment, the pressing portion includes an arc structure and a connecting rib connected to the inner wall of the arc structure, the connecting rib extends radially, and the first through portion is formed between the area surrounded by the connecting rib and the arc structure, one end of the connecting rod is connected to the connecting rib, and the other end of the connecting rod passes through the bottom of the mounting groove and is connected to the axial upper end of the sealing support; the size of the arc structure of the pressing portion corresponds to the size of the cylindrical structure of the joint, so that the contact area between the pressing portion and the joint is larger, ensuring a stable contact between the joint and the pressing portion, so that the downward force of the joint is stably transmitted to the sealing support through the pressing portion, thereby realizing the synchronous axial downward movement of the pressing portion and the sealing support; at the same time, the area of ​​the first through portion is guaranteed to avoid affecting the normal circulation speed of the slurry.

[0021] Preferably, the driving member is an elastic member, the sealing support includes a plate-like body, a sealing ring sleeved on its outer circumference and a rod connected to the plate-like body, and the elastic member can exert an axial upward pushing force on the rod so that the plate-like body and the sealing ring seal the bottom of the mounting groove.

[0022] The elastic part can be axially compressed and provide an axially upward restoring force. The function of the sealing ring and the plate-like body is to seal the bottom of the mounting groove. The function of the rod is to connect with the elastic part and transmit the restoring force of the elastic part to the plate-like body and the sealing ring, thereby driving the entire sealing support to move axially upward, so that the plate-like body and the sealing ring seal the bottom of the mounting groove.

[0023] The axial distance between the first and second positions of the sealing support corresponding to the upper surface of the plate-like body in the axial direction is H1. During the installation or disassembly of the filter component, its joint moves axially along the inner wall of the mounting groove. The axial height of the area of ​​the mounting groove that can provide axial movement of the joint is H2. H1 is not greater than H2, which can ensure that during the disassembly of the filter component, the sealing support first seals the bottom of the mounting groove, and then the joint of the filter component is separated from the wall of the mounting groove. Therefore, during the rising process of the sealing support and before the bottom of the groove is completely sealed, even if there is liquid spraying upward from the mounting groove, it will be blocked by the joint and remain in the mounting groove, and will not spray out of the outside of the first base, thereby avoiding the waste caused by overflow of residual liquid and pollution of the use environment.

[0024] Preferably, the bottom plate of the first base is provided with an opening at the bottom of the groove corresponding to the mounting groove, the rod portion passes through the opening and at least partially passes through the bottom plate; a limiting support is fixed to the outside of the bottom plate of the first base and the outer periphery of the opening, the elastic member is located in the limiting support, at least part of the rod portion extends into the limiting support and abuts against or is connected to one end of the elastic member, and the other end of the elastic member abuts against or is connected to the inside of the limiting support.

[0025] The limit support and the elastic member are arranged outside the bottom plate of the first base to save the internal space of the first base; at the same time, the opening on the first base is utilized to cooperate with the limit support to play the role of axial limitation and axial guidance for the rod and the overall sealing support, so that the axial restoring force of the elastic member is transmitted to the plate-like body through the rod to drive the entire sealing support, ensuring that the entire sealing support can move axially to seal or conduct the bottom of the groove.

[0026] Preferably, a gasket and a nut are fixed to the periphery of the region where the rod extends out of the opening, and the elastic member is a spring, one end of which is sleeved axially below the nut;

[0027] The interior of the position limiting support is provided with an insertion rod extending axially upward, at least a portion of the insertion rod is inserted into the groove at the end of the rod portion, and the rod portion can move up and down relative to the axial direction of the insertion rod;

[0028] The spring is partially wrapped around the outer circumference of the rod portion and partially wrapped around the outer circumference of the insertion rod. Both ends of the spring are respectively against the inner end surfaces of the nut and the limiting support that are opposite to each other.

[0029] The nut and the limit support play an axial limiting role on the two ends of the spring, while the insertion rod and the end section of the rod play a radial limiting role on the spring; and the nut can increase the contact and abutment area with the spring, and improve the connection stability between the spring and the rod, so that the axial restoring force of the spring can be stably transmitted to the sealing support, and the rod can move up and down axially relative to the insertion rod.

[0030] Preferably, the pressing body is integrally formed with the plate-like body through the connecting rod to improve the connection strength between the pressing body and the sealing support to ensure the conduction of force; alternatively, one end of the connecting rod is threadedly connected or snap-connected to the plate-like body to facilitate production and assembly and meet the requirements of use in multiple scenarios.

[0031] Preferably, a non-return mechanism is also provided in the joint of the filter assembly;

[0032] An ejector split body is also provided at a position corresponding to the mounting groove in the first base, the ejector split body comprises a mounting portion, an ejector rod connected to the mounting portion, and a second through portion formed in the mounting portion, the ejector split body is located in the mounting groove and axially positioned at the groove bottom of the mounting groove;

[0033] The pressing body, the sealing support and the ejector split body are provided in a split type, the axial projections of the pressing portion and the mounting portion at least partially overlap, the first through portion is communicated with the second through portion, the ejector rod of the ejector split body passes through the first through portion upward and extends axially, the connecting rod of the pressing body passes through the mounting portion downward and is fixedly connected to the plate-like body of the sealing support, and the pressing body can move up and down axially relative to the ejector split body;

[0034] When the sealing support is in the first working position, the push rod pushes the anti-return mechanism to release the sealing of the joint by the anti-return mechanism, and the bottom of the installation groove is connected with the inside of the joint through the second through-portion and the first through-portion;

[0035] When the sealing support is in the second working position, the ejector rod is separated from the anti-return mechanism, and the anti-return mechanism seals the joint.

[0036] Some filter components are provided with a non-return mechanism inside the joint, and the function of the non-return mechanism is to seal the joint to prevent the residual liquid inside the filter component from flowing out of the joint when the filter component is taken out from the first base; the installation groove corresponding to the joint also has a pin split that can lift the non-return mechanism, so that when the filter component is installed on the first base, the non-return mechanism no longer seals the joint, and the interior of the filter component can be connected with the joint, the installation groove and the flow channel in the first base; wherein the pin split includes a mounting portion, a push rod connected to the mounting portion and a second through portion formed in the mounting portion, the mounting portion functions to limit the pin split in the mounting groove and axially position it at the bottom of the mounting groove, the push rod functions to lift the non-return mechanism, and the second through portion is connected to the first through portion to provide a channel for the liquid to pass through the pressing portion and the mounting portion.

[0037] The ejector pin split body is further combined with the sealing support and the pressing body, and the pressing body is linked with the joint of the filter assembly. Thus, when the joint of the filter assembly is correspondingly inserted into the mounting groove and the pressing body is pressed down, the sealing support moves downward axially with the pressing body synchronously and separates from the bottom of the mounting groove. The joint is connected to the internal flow channel of the first base. The joint, the pressing body and the sealing support continue to be pressed down. The ejector rod contacts the non-return mechanism and lifts the non-return mechanism. The joint is connected to the interior of the filter assembly, that is, the internal flow channel of the filter assembly and the first base are connected. The sealing support is also located in its first position. The insertion depth of the joint in the mounting groove is in place. At this time, the upstream flow channel inside the first base can be connected to the interior of the filter assembly through the bottom of the mounting groove, the first through-portion, the second through-portion and a joint of the filter assembly. The feed liquid passes into the filter assembly to complete the filtration. The filtrate flows out of the filter assembly and enters the downstream flow channel inside the first base through another joint, the first through-portion, the second through-portion and the bottom of the mounting groove to achieve liquid passage and filtration.

[0038] When the filter assembly is removed from the first base, that is, when at least part of the joint is removed from the mounting groove, the joint of the filter assembly no longer presses down on the pressing body, and the sealing support moves axially upward under the action of the driving member, which can quickly seal the bottom of the mounting groove, so that the liquid in the first base and below the bottom of the groove cannot be sprayed upward through the mounting groove; the push rod is then separated from the non-return mechanism, and before the joint is completely removed, the non-return mechanism can seal each joint in time to prevent residual liquid therein from flowing out of each joint.

[0039] Preferably, the mounting portion comprises an annular structure and two extending ribs extending from the inner wall of the annular structure toward each other, the ends of the two extending ribs are arranged at intervals, and the annular structure and the two extending ribs are arranged to form the second through portion;

[0040] The push rods include two push rods, which are respectively located at the ends of the two extension ribs, and the two push rods are arranged at intervals;

[0041] The connecting rod passes between the ends of the two extending ribs and is fixedly connected to the plate-shaped body of the sealing support. A radial gap is set between the connecting rod and the push rod.

[0042] The mounting portion of the annular structure is more stably positioned at the bottom of the mounting groove, which is beneficial for the ejector rod to stably lift the anti-return mechanism; and two extension ribs are extended toward each other by the inner wall of the annular structure, and the ends of the two extension ribs are spaced apart. The annular structure and the two extension ribs are surrounded to form a second through-portion connected to the first connecting portion, and the overall structure of the ejector pin split is simple; a radial gap is set between the connecting rod and the ejector pin to avoid interference with each other when the pressing body moves axially relative to the ejector pin split, thereby ensuring that the pressing body can move axially smoothly.

[0043] Preferably, when the sealing support is in the first position, the pressing portion abuts against the mounting portion axially, and the push rod pushes the non-return mechanism to release the sealing of the joint by the non-return mechanism;

[0044] When the sealing support is in the second position, the pressing portion is separated from the mounting portion, and the axial distance therebetween is H3, H3=H1; the top end of the ejector rod is separated from the anti-return mechanism, and the axial distance therebetween is H4, H4<H3.

[0045] This ensures that when the sealing support moves from the second station to the first station, the push rod can also simultaneously push the non-return mechanism to release the seal of the non-return mechanism on the joint and achieve corresponding liquid flow; and in the process of switching the sealing support from the first station to the second station, the push rod is first separated from the non-return mechanism, and the non-return mechanism is reset and seals the joint to prevent the liquid inside the filter assembly from flowing out through the joint. At this time, the joint has not left the installation groove, and before the bottom of the groove is completely sealed by the sealing support, even if there is liquid spraying upward from the installation groove, it will be blocked by the joint and remain in the installation groove, and will not spray out of the first base, thereby avoiding the waste and pollution of the use environment caused by the spraying of residual liquid.

[0046] In summary, compared with the prior art, the present invention has at least the following beneficial effects:

[0047] The filtering device of the utility model is provided with a pressing body, a sealing support and a driving member at a position of the first base corresponding to the mounting groove, wherein the pressing body includes a connected pressing part and a connecting rod, and a first through-part connected to the inside of the joint, wherein the pressing part cooperates with the joint of the filter assembly, and its radial outer end can be axially pressed by the joint of the filter assembly, and the pressing part can be axially movably arranged in the mounting groove, and at the same time, the mounting groove also produces radial limitation on the pressing part to ensure that the pressing part moves along the axis in the mounting groove; the first through-part functions to provide a channel for the liquid to flow through the pressing body; the pressing part is connected to the axial upper end of the sealing support through the connecting rod, and the axial force exerted on the pressing part is transmitted to the sealing support; the sealing support functions to seal the through-groove bottom of the mounting groove, and under the action of the pressing part and the joint, the sealing support will move away from the mounting groove, thereby connecting the joint and the flow channel inside the first base; the driving member functions to apply an axial upward force to the sealing support, so that it can move close to the groove bottom of the mounting groove and achieve sealing.

[0048] Therefore, the filter device of the utility model uses a pressing body to associate the filter assembly with the sealing support. When the filter assembly is installed inside the housing, its joint is inserted into the installation groove, and the pressing body is pressed down. The sealing support moves downward axially with the pressing body and separates from the bottom of the installation groove. The sealing support reaches its first position and conducts the bottom of the installation groove, so that the external pipeline can be connected through the bottom of the installation groove, the first through-hole and the joint of the filter assembly, and liquid can be passed;

[0049] When the filter assembly is removed from the first base, that is, when at least part of the joint is removed from the mounting groove, the filter assembly no longer presses down on the pressing body, and the sealing support moves axially upward under the action of the driving member, which can quickly seal the bottom of the mounting groove, so that the liquid in the first base and below the bottom of the groove cannot spray upward to the outside of the base through the mounting groove, thus solving the problem of upward spraying of liquid in the first base, avoiding waste of liquid and pollution of the use environment, and having good anti-spraying effect and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0051] Figure 1 It is a cross-sectional schematic diagram of the filtering device of the first embodiment of the utility model, which shows the separation state of the sealing support and the mounting groove.

[0052] Figure 2 It is a cross-sectional schematic diagram of the filtering device of the first embodiment of the utility model, which shows the sealing state of the sealing support and the mounting groove.

[0053] Figure 3 It is a cross-sectional schematic diagram of the sealing support and the pressing body according to an embodiment of the utility model.

[0054] Figure 4 The figure is a schematic structural diagram of a pressing body according to an embodiment of the utility model.

[0055] Figure 5 It is a structural schematic diagram of a pressing body according to another embodiment of the utility model.

[0056] Figure 6 It is a structural schematic diagram of a pressing body according to another embodiment of the utility model.

[0057] Figure 7 It is a cross-sectional schematic diagram of the filtering device of the second embodiment of the utility model, which shows the separation state of the sealing support and the mounting groove.

[0058] Figure 8 It is a cross-sectional schematic diagram of the filtering device of the second embodiment of the utility model, which shows the sealing state of the sealing support and the mounting groove.

[0059] Fig. 9 It is a schematic structural diagram of the sealing support and ejector pin being separated in the second embodiment of the utility model.

[0060] Fig.10 It is a schematic diagram of the exploded structure of the sealing support and the ejector pin separated in the second embodiment of the utility model.

[0061] Fig.11 It is a cross-sectional schematic diagram of the sealing support and the ejector pin separated in the second embodiment of the utility model, which shows the state in which the pressing body and the mounting portion are fitted.

[0062] Fig.12It is a cross-sectional schematic diagram of the sealing support and the ejector pin separated from each other in the second embodiment of the utility model, which shows the state where the pressing body and the mounting part are separated.

[0063] Fig.13 It is a cross-sectional schematic diagram of the first base according to an embodiment of the utility model.

[0064] Fig.14 It is a cross-sectional schematic diagram of a position limiting support according to an embodiment of the utility model.

[0065] Fig.15 It is a cross-sectional schematic diagram of a filter element in an embodiment of the utility model.

[0066] Description of Reference Numerals

[0067] 1. housing; 11. first cylinder; 12. first base; 121. mounting groove; 1211. groove bottom; 1212. annular boss; 122. upstream interface; 123. downstream interface; 124. opening;

[0068] 2. Pressing body; 21. Pressing portion; 211. Ring structure; 212. Connecting ribs; 22. Connecting rod; 23. First through portion;

[0069] 3. Sealing support; 31. Plate-shaped body; 32. Sealing ring; 33. Rod; 331. Main body; 332. Small diameter section; 333. Step surface; 334. Gasket; 335. Nut; 336. Groove;

[0070] 4. driving member; 41. spring; 42. position limiting support; 421. insertion rod;

[0071] 5. split ejector pin; 51. mounting portion; 511. annular structure; 512. extension rib; 52. ejector pin; 53. second through portion;

[0072] 6. Filter assembly; 61. Connector; 62. Shell; 621. Second cylinder; 622. Second base; 63. Filter element; 64. Anti-return mechanism. DETAILED DESCRIPTION

[0073] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0074] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0075] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0076] As attached Figure 1 To Attachment Fig.15 As shown, the filtering device of the embodiment of the utility model includes a shell 1 and a filter component 6 installed therein, the shell 1 includes a first cylinder 11 and a first base 12 that form a detachable sealed connection, the first cylinder 11 and the first base 12 form a cavity, and the filter component 6 is located in the cavity. Based on different application scenarios, the type and structure of the filter component 6 are also different. The common point is that the filter component 6 has at least one joint 61, and the joint 61 is connected to the inside of the filter component 6. The first base 12 has an installation groove 121 for sealing the joint 61 of the filter component 6. When the filter component 6 is installed in the cavity, the outer wall of the joint 61 is sealed with the inner wall of the installation groove 121, and the groove bottom 1211 of the installation groove 121 is connected, so that the joint 61 can be connected with the upstream interface 122 or the downstream interface 123 in the first base 12 in some cases.

[0077] Normally, the upstream pressure of the filter device is higher than the downstream pressure, forming a certain pressure difference, because the feed liquid needs to overcome the resistance of the filter element to pass through. In addition, in the short time when the liquid is stopped, there is still a certain residual pressure at the upstream interface 122. Or, in some special cases, the height of the end of the pipe connected to the downstream interface 123 of the filter device is higher than the height of the first base 12, and the height difference is relatively large, which also forms a large pressure difference. Due to the existence of the above-mentioned pressure difference, at the moment when the used filter assembly 6 is taken out of the first base 12, the residual liquid in the first base 12 will be sprayed upward from the installation groove 121 connected to the upstream interface 122 to the outside of the first base 12, and from the installation groove 121 connected to the downstream interface 123 to the outside of the first base 121, causing waste and pollution of the feed liquid.

[0078] Based on this, the embodiment of the utility model is provided with a sealing support 3, a pressing body 2 and a driving member 4 in the first base 12 corresponding to at least one of the mounting grooves 121. The function of the sealing support 3 is to seal with the mounting groove 121 to prevent residual liquid from spraying out from the mounting groove 121 of the first base 12. In addition, in order to achieve the best anti-spraying effect, in this embodiment, the above-mentioned sealing support 3, pressing body 2 and driving member 4 are provided at the mounting groove 121 connected to the upstream interface 122 and the mounting groove 121 connected to the downstream interface 123, that is, liquid spraying can be avoided at both mounting grooves 121. The specific structure of the sealing support 3, pressing body 2 and driving member 4 is as follows.

[0079] The pressing body 2 includes a pressing portion 21 and a connecting rod 22, and has a first through portion 23 connected to the inside of the joint 61. The function of the first through portion 23 is to ensure that the pressing portion 21 does not affect the connection between the joint 61 and the bottom 1211 of the mounting groove 121, and the feed liquid can normally enter the first base 12 through the joint 61 or enter the joint 61 from the first base 12; the pressing portion 21 can be axially movably arranged in the mounting groove 121, and its radial outer end can be axially pressed by the joint 61 of the filter assembly 6; the pressing body 2 is connected to the axial upper end of the sealing support 3 through the connecting rod 22. The function of the pressing body 2 is that when the filter assembly 6 is installed in the outer shell 1, the joint 61 of the filter assembly 6 produces an axial downward pressing effect on the pressing part 21, thereby pushing the pressing body 2 and the sealing support 3 to move axially downward synchronously and reach the first working position of the sealing support 3. The sealing support 3 is located axially below the corresponding installation groove 121 and is separated from the groove bottom 1211 of the installation groove 121, thereby connecting the groove bottom 1211 of the installation groove 121; at this time, the upstream interface 122 of the first base 12 is connected to an installation groove 121 and the corresponding joint 61, and is connected to the interior of the filter assembly 6, and the feed liquid enters the interior of the filter assembly 6 for filtration, and the formed filtrate flows back to the downstream interface 123 of the first base 12 through another joint 61 and the corresponding installation groove 121.

[0080] The driving member 4 is located on the side of the sealing support 3 away from the pressing body 2, and can produce an axial upward pushing effect on the sealing support 3. Its function is that when at least part of the joint 61 is removed from the installation groove 121, the driving member 4 produces an axial upward pushing effect on the sealing support 3, thereby pushing the sealing support 3 and the pressing body 2 to move axially upward synchronously and reach the second station of the sealing support 3, and the sealing support 3 seals the groove bottom 1211 of the installation groove 121. The driving member 4 can be a component that can produce an axial upward force, such as an electric cylinder, a cylinder or an elastic member.

[0081] The connector 61 is at least partially moved out of the mounting groove 121, which means that when the connector 61 moves axially upward, the axial downward force on the pressing body 2 disappears or the axial downward force is smaller than the axial upward force provided by the driving member 4. The sealing support 3 moves upward under the action of the axial upward restoring force of the driving member 4, and seals the bottom 1211 of the mounting groove 121 before the connector 61 of the filter assembly 6 leaves the mounting groove 121. The residual liquid in the first base 12 will not be sprayed out of the mounting groove 121, thereby avoiding waste and pollution of the liquid.

[0082] Embodiment 1

[0083] As attached Figure 1 and attached Figure 2 As shown, the filter assembly 6 in this embodiment is a plastic capsule containing a filter element 63, and there are two connectors 61 located in the plastic capsule shell, which are connected to the upstream and downstream of the filter element respectively; its connector 61 is a through structure, and the interior can be connected with the bottom 1211 of the installation groove 121, and the installation grooves 121 corresponding to each connector 61 in the first base 12 are provided with sealing supports 3, pressing bodies 2 and driving members 4.

[0084] Since the function of the pressing portion 21 is to cooperate with the joint 61 of the filter assembly 6 to transmit the force of the joint 61 to the sealing support 3 without affecting the circulation of the feed liquid, and the shape of the joint 61 is generally cylindrical, the radial outer edge of the pressing portion 21 needs to be in contact with the joint 61. At the same time, the pressing portion 21 has a first through portion 23. The first through portion 23 is used for circulating the feed liquid and has various shapes, which can be changed according to the shape of the pressing portion 21.

[0085] In some specific embodiments, as shown in the attached Figure 4As shown, the pressing part 21 is a straight-line rod-shaped structure, and the two ends of the straight-line rod-shaped structure are the outer edges of the pressing part 21, which are the parts in contact with the joint 61. The first through-portion 23 is located on both sides of the straight-line rod-shaped structure. One end of the connecting rod 22 is connected to the straight-line rod-shaped structure, and the other end of the connecting rod 22 passes through the groove bottom 1211 of the mounting groove 121 and is connected to the axial upper end of the sealing support 3, so that the force received by the pressing part 21 is transmitted to the sealing support 3; preferably, the connection position of the connecting rod 22 and the straight-line rod-shaped structure can be set at the center of the straight-line rod-shaped structure, and correspondingly, the connection position of the connecting rod 22 and the sealing support 3 is also at the center of the axial upper end of the sealing support 3, so that the force transmitted to the sealing support 3 is circumferentially uniform, which is conducive to the axial movement of the sealing support 3 without deviation. The pressing part 21 of the above structure has a simple structure and is easy to process.

[0086] In some other specific embodiments, as shown in the attached Figure 5 As shown, the pressing portion 21 includes a plurality of straight rods distributed radially, the outer ends of the straight rods are the outer edges of the pressing portion 21, which are the parts in contact with the joint 61, the straight rods are cross-connected at the center, the first through portion 23 is located between adjacent straight rods, one end of the connecting rod 22 is connected to at least one straight rod, and the other end of the connecting rod 22 passes through the bottom 1211 of the mounting groove 121 and is connected to the axial upper end of the sealing support 3, so that the force transmitted to the sealing support 3 is circumferentially uniform, which is conducive to the axial movement of the sealing support 3 without deviation. Compared with the pressing portion 21 of the straight rod structure, the pressing portion 21 of the above structure has a larger contact area with the joint 61 and a more stable pressing, but correspondingly, the area of ​​the first through portion 23 is reduced.

[0087] As attached Figure 6 The pressing portion 21 in the first embodiment is shown, which includes an arc structure and a connecting rib 212 connected to the inner wall of the arc structure. The connecting rib 212 extends radially, and a first through portion 23 is formed between the connecting rib 212 and the area surrounded by the arc structure. One end of the connecting rod 22 is connected to the connecting rib 212, and the other end of the connecting rod 22 passes through the groove bottom 1211 of the mounting groove 121 and is connected to the axial upper end of the sealing support 3. Preferably, one end of the connecting rod 22 can be connected to the center of the connecting rib 212, and correspondingly, the connection position of the connecting rod 22 and the sealing support 3 is also at the center of the axial upper end of the sealing support 3, so that the force transmitted to the sealing support 3 is circumferentially uniform, which is beneficial for the sealing support 3 to move axially without deviation. It should be noted that the arc structure can be as shown in the attached figure. Figure 6 The circular ring structure 211 shown may also be a plurality of arc segments spaced apart from each other, and the connecting ribs 212 extend along the diameter direction of the circle where the arc segments are located, and are respectively connected to the inner walls of two opposite arc segments.

[0088] The pressing portion 21 of the above-mentioned structure has an arc structure whose dimensions correspond to those of the cylindrical structure of the joint 61, thereby making the contact area between the pressing portion 21 and the joint 61 larger, ensuring a smooth contact between the joint 61 and the pressing portion 21, so that the downward force of the joint 61 is stably transmitted to the sealing support 3 through the pressing portion 21, thereby achieving synchronous downward movement of the pressing portion 21 and the sealing support 3; at the same time, the area of ​​the first through portion 23 is ensured to avoid affecting the normal circulation speed of the slurry.

[0089] As attached Figure 1 and attached Figure 2 As shown, the driving member 4 is an elastic member, and the sealing support 3 includes a plate-like body 31, a sealing ring 32 sleeved on its outer circumference and a rod 33 connected to the plate-like body 31. The sealing ring 32 and the plate-like body 31 function to seal the groove bottom 1211 of the mounting groove 121, and the rod 33 functions to be connected with the elastic member, and the elastic member can produce an axial upward pushing effect on the rod 33, so that the plate-like body 31 and the sealing ring 32 seal the groove bottom 1211 of the mounting groove 121.

[0090] The pressing part 21 is fixedly connected to the plate-like body 31 through the connecting rod 22. In this embodiment, the pressing body 2 can be integrally formed with the plate-like body 31 through the connecting rod 22 to improve the connection strength between the pressing body 2 and the sealing support 3 and ensure the transmission of force; in other embodiments, one end of the connecting rod 22 is threaded or clamped to the plate-like body 31.

[0091] Based on this, the axial distance between the pressing portion 21 and the plate-like body 31 is fixed. Figure 2 As shown, the axial distance between the first station and the second station of the sealing support 3 at different axial positions corresponding to the upper surface of the plate-like body 31 is H1, which is the axial movement distance of the pressing portion 21; during the installation or removal of the filter assembly 6, its joint 61 moves axially along the inner wall of the mounting groove 121 and forms a sealing fit with the inner wall of the mounting groove 121, and the axial height of the area of ​​the mounting groove 121 that can provide the joint 61 with axial movement is H2; H1 and H2 meet the following conditions, H1≤H2, thereby ensuring that, during the removal of the filter assembly 6, the sealing support 3 first seals the groove bottom 1211 of the mounting groove 121, and the joint 61 of the filter assembly 6 is then separated from the groove wall of the mounting groove 121, then during the rising process of the sealing support 3 and before the groove bottom 1211 is completely sealed, even if there is liquid spraying upward from the mounting groove 121, it will be blocked by the joint 61 and remain in the mounting groove 121, and will not spray out of the outside of the first base 12, thereby avoiding the waste caused by the overflow of residual liquid and the pollution of the use environment.

[0092] The driving member 4 can be arranged inside the first base 12, or in the inner wall of the first base 12 away from the plate-like body 31, or outside the bottom plate of the first base 12. Since the space inside the first base 12 is limited, as a preference, in this embodiment, the driving member 4 is located outside the bottom plate of the first base 12. Specifically, the bottom plate of the first base 12 is provided with an opening 124 at the bottom 1211 of the corresponding mounting groove 121, and the rod portion 33 passes through the opening 124 and at least partially passes through the bottom plate. At the same time, the opening 124 on the first base 12 is used to axially limit and axially guide the rod portion 33; a limiting support 42 is fixed to the outside of the bottom plate of the first base 12 and the outer periphery of the opening 124, and the elastic member is located in the limiting support 42, at least part of the rod portion 33 extends into the limiting support 42 and abuts against or is connected to one end of the elastic member, and the other end of the elastic member abuts against or is connected to the inside of the limiting support 42, thereby transmitting the axial reset force of the elastic member to the plate-like body 31 through the rod portion 33 to drive the entire sealing support 3.

[0093] As attached Figure 3 As shown, a gasket 334 and a nut 335 are fixed to the periphery of the area where the rod 33 extends out of the opening 124. The area where the rod 33 extends out of the opening 124 includes a body 331 and a small diameter section 332. The outer diameter of the small diameter section 332 is smaller than the outer diameter of the body 331. Therefore, the small diameter section 332 and the body 331 form a step surface 333. The gasket 334 abuts against the step surface 333, and the outer wall of the small diameter section 332 is provided with an external thread. The nut 335 is threadedly connected to the small diameter section 332 to fix the gasket 334 on the small diameter section 332. As shown in the attached figure Figure 1 and attached Figure 2 As shown, the elastic member is a spring 41, and the spring 41 is sleeved with a partial length wrapped around the outer periphery of the rod 33, and a partial length wrapped around the outer periphery of the plug rod 421. One end of the spring is sleeved axially below the nut 335, and the other end is abutted against or connected to the inner wall of the limiting support 42, that is, the nut 335 and the limiting support 42 jointly play the role of axial limiting spring 41. At the same time, the rod 33 and the plug rod 421 also play a role in radial positioning of the spring 41; and the nut 335 can increase the connection area with the spring 41, and improve the connection stability of the spring 41 and the rod 33, so that the axial reset force of the spring 41 can be stably transmitted to the sealing support 3.

[0094] When the filter assembly 6 is not installed in the outer shell 1 or part of the length of the joint 61 of the filter assembly 6 is moved out of each installation groove 121 of the first base 12, the spring 41 tends to recover its original length, that is, its length increases, thereby pushing the sealing support 3 toward the direction close to the filter assembly 6, that is, axially upward movement, and the sealing ring 32 of the sealing support 3 contacts and seals the groove bottom 1211 of each installation groove 121.

[0095] In the process of inserting the two joints 61 of the filter assembly 6 into the respective installation grooves 121 of the first base 12, the two joints 61 first form a seal with the side walls of the respective installation grooves 121. When the two joints 61 begin to contact and press down the pressing parts 21, the sealing support 3 begins to move axially downward, and the sealing ring 32 separates from the groove bottom 1211 of the installation groove 121, and the groove bottom 1211 opens to achieve liquid flow. At this time, the upstream interface 122 of the first base 12 is connected to the corresponding joint 61 through the groove bottom 1211 of an installation groove 121, and is connected to the interior of the filter assembly 6. The feed liquid enters the interior of the filter assembly 6 for filtration, and the formed filtrate flows back to the downstream interface 123 of the first base 12 through the other joint 61 and the groove bottom 1211 of the corresponding installation groove 121, and is then discharged.

[0096] When disassembling the filter assembly 6, after the first cylinder 11 is removed from the first base 12, the filter assembly 6 is gradually moved out of the first base 12, the axial pressing effect of the joint 61 on the pressing body 2 is reduced, the pressure on the spring 41 is reduced, the spring 41 restores its original length, and pushes the sealing support 3 upward, and its sealing ring 32 quickly seals the bottom 1211 of the mounting groove 121, and then, the joint 61 of the filter assembly 6 leaves the mounting groove 121 of the first base 12.

[0097] As attached Fig.14 As shown, the interior of the limiting support 42 has an axially upwardly extending rod 421, and at least a portion of the rod 421 is inserted into the groove 336 at the end of the rod portion 33. The rod portion 33 can move axially up and down relative to the rod 421. The rod 421 cooperates with the groove 336 to play a guiding role, thereby ensuring the axial movement of the sealing support 3; at the same time, the depth of the groove 336 also limits the axial movement distance of the sealing support 3, so that it is compatible with the axial height H2 of the area of ​​the mounting groove 121 that can provide axial movement of the joint 61.

[0098] As attached Figure 1 and attached Figure 2 As shown, part of the spring 41 is wrapped around the outer periphery of the rod 33, and part of the spring 41 is wrapped around the outer periphery of the plug rod 421, and the two ends of the spring 41 respectively abut against the inner end faces of the nut 335 and the limiting support 42. The depth of the groove 336 can be greater than the axial length of the small diameter section 332, so that part of it extends into the body 331 with a larger outer diameter to ensure the structural strength of the rod 33; on the other hand, the axial length of the plug rod 421 is adapted to the depth of the groove 336 and is also greater than H1, thereby ensuring that when the sealing support 3 is in the second working position, the end of the plug rod 421 is still located in the groove 336, avoiding the situation that the plug rod 421 is completely separated from the groove 336 and the sealing support 3 moves to the first working position again, and the plug rod 421 and the groove 336 are offset and cannot be plugged in, resulting in the sealing support 3 being unable to move downward.

[0099] In other embodiments, Fig.15 As shown, the filter assembly 6 is a filter element 63, which has a connector 61. Usually, the connector 61 is connected to the center rod inside the filter element 63. The filter element is a conventional folded or melt-blown filter element, which will not be described here. The filter element 63 is directly installed inside the housing 1. The first base 12 is connected to the internal cavity of the housing 1 through one of the mounting grooves 121. The connector 61 of the filter element is sealed and plugged with the other mounting groove 12, so that the corresponding flow channel in the first base 12 is connected to the bottom 1211 of the mounting groove 121 and the connector 61 and the center rod of the filter element 63. The above-mentioned sealing support 3, pressing body 2 and driving member 4 are provided at the mounting groove 121 corresponding to the connector 61 in the first base 12. In this embodiment, the flow path of the liquid feed may be, from the upstream interface 122 of the first base 12 through the mounting groove 121 into the internal cavity of the housing 1, then filtered by the filter element 63, collected inside the central rod of the filter element, then passed through the joint 61 and the corresponding groove bottom 1211 of the mounting groove 121 to the downstream interface 123 of the first base 12, and then discharged. Of course, the flow path of the liquid feed may also be reversed.

[0100] Embodiment 2

[0101] As attached Figure 7 and attached Figure 8 As shown, a non-return mechanism 64 is further provided in the joint 61 of the filter assembly 6 in this embodiment. The function of the non-return mechanism 64 is to seal the joint 61. The non-return mechanism 64 needs to be lifted up first to release the seal on the joint 61 before the internal channel of the first base 12 and the inside of the filter assembly 6 can be connected.

[0102] Therefore, a pin split body 5 is further provided in the first base 12 corresponding to each mounting groove 121, and the pin split body 5 is used to push up the anti-return mechanism 64, and connect the joint 61 and the channel inside the first base 12. The structures of the pressing body 2, the sealing support 3 and the driving member 4 of this embodiment can be as described in the first embodiment.

[0103] The filter assembly 6 in this embodiment includes a shell 62 and a filter element 63 installed therein, the shell 62 includes a second cylinder 621 and a second base 622, the second base 622 is sealed and connected to the second cylinder 621 to form a cavity for installing the filter element 63, the second base 622 is provided with two joints 61 connecting the upstream and downstream sides of the filter element 63, and the two joints 61 are provided with a non-return mechanism 64, usually, the non-return mechanism 64 includes a non-return head, a spring connected to the non-return head and a guide mechanism, the non-return head moves axially along the guide structure, and the spring is used to apply an axial downward reset force to the non-return head.

[0104] When the filter assembly 6 is installed to the housing 1, the connector 61 contacts and presses the pressing body 2 downward, pushing the pressing body 2 and the sealing support 3 to move axially downward, connecting the groove bottom 1211, and the upstream interface 122 of the first base 12 is connected to a connector 61 through the groove bottom 1211 of the installation groove 121, and the downstream interface 123 is connected to another connector 61 through the groove bottom 1211 of another installation groove 121; the filter assembly 6 continues to move axially downward, and the anti-return head is subjected to the axial upward force of the ejector split 5, which is greater than the axial downward force generated by the spring, and the anti-return head moves upward, connecting the connector 61, and each connector 61 is respectively connected to the upstream and downstream sides of the filter element 63. During filtering, the feed liquid enters the interior of the filter assembly 6 from the upstream interface 122 through the groove bottom 1211 of an installation groove 121 and the connector 61, and is filtered by the filter element to form filtrate, and then passes through another connector 61 through the groove bottom 1211 of another installation groove 121 and flows into the downstream interface 123 to complete the filtering.

[0105] When the filter assembly 6 is removed from the outer shell 1, the filter assembly 6 moves axially upward, and the joint 61 gradually moves out of the installation groove 121, the axial pressing effect of the joint 61 on the pressing body 2 is reduced, the pressure on the spring 41 is reduced, and the spring 41 recovers its original length, pushing up the sealing support 3, and its sealing ring 32 quickly seals the bottom 1211 of the installation groove 121 to prevent liquid spraying in time; the axial upward force of the ejector split 5 on the check head gradually decreases and is less than the axial downward force generated by the spring, and the check head moves downward in the joint 61, sealing the corresponding joint 61 to prevent residual liquid therein from flowing out of any joint 61, and then, the joint 61 of the filter assembly 6 leaves the installation groove 121 of the first base 12.

[0106] In order to realize the function of the ejector anti-return mechanism 64, the ejector split body 5 includes a mounting portion 51, a ejector rod 52 connected to the mounting portion 51, and a second through portion 53 formed in the mounting portion 51. The ejector split body 5 is located in the mounting groove 121 and axially positioned at the groove bottom 1211 of the mounting groove 121; the mounting portion 51 is used to position the ejector split body 5 at the groove bottom 1211 of the mounting groove 121. Correspondingly, in order to position the ejector split body 5, the groove bottom 1211 of the mounting groove 121 is provided with an annular boss 1212, and the annular boss 1212 is formed by the groove bottom 121 The inner wall of the annular boss 1212 extends radially for a distance to form a positioning surface, that is, the inner diameter of the annular boss 1212 is smaller than the inner diameter of the mounting groove 121, and the lower end surface of the mounting portion 51 abuts against the positioning surface, thereby axially positioning the ejector body 5 in the mounting groove 121. Similarly, the outer diameter of the mounting portion 51 is substantially equivalent to the inner diameter of the mounting groove 121, thereby radially limiting the mounting portion 51. Under normal circumstances, the ejector body 5 will not move axially and radially in the mounting groove 121, so as to ensure that the anti-return mechanism 64 can be accurately and quickly lifted each time the filter assembly 6 is installed. The function of the ejector rod 52 is to lift the anti-return mechanism 64, and the function of the second through portion 53 is to ensure the normal circulation of the feed liquid.

[0107] In this embodiment, the pressing body 2, the sealing support 3 and the ejector split body 5 are provided in a split type, and the pressing portion 21 can move axially in the mounting groove 121, that is, it can move up and down axially relative to the ejector split body 5. Therefore, the pressing portion 21 is located axially above the mounting portion 51, and the axial projections of the pressing portion 21 and the mounting portion 51 at least partially overlap, that is, the pressing portion 21 can form a stable contact fit with the mounting portion 51 at least partially under the action of the joint 61, and the pressing portion 21 itself can remain stable, thereby transmitting the axial force of the joint 61 to the sealing support 3; the first through portion 23 is connected to the second through portion 53, that is, the normal flow path of the slurry is guaranteed, and the ejector rod 52 of the ejector split body 5 passes through the first through portion 23 upward and extends axially, which can lift the anti-return mechanism 64.

[0108] Since the ejector split body 5 needs to be sleeved with the pressing body 2, the pressing body 2 in this embodiment needs to be provided as a split type with the sealing support 3. The connecting rod 22 of the pressing body 2 passes downward through the mounting portion 51 and is fixedly connected to the plate-like body 31 of the sealing support 3. The specific installation method can be as follows: the pressing body 2 and the ejector split body 5 are arranged up and down, and the ejector rod 52 corresponds to the first through-portion 23, and the connecting rod 22 corresponds to the second through-portion 53. The two can move axially relative to each other, the ejector rod 52 passes upward through the first through-portion 23, the connecting rod 22 passes downward through the second through-portion 53 and also passes through the mounting portion 51, and is fixedly connected to the plate-like body 31. The connecting rod 22 can be an integral structure with the pressing portion 21 or a split structure. In this embodiment, the connecting rod 22 and the plate-like body 31 are threadedly fixed. When installing, the connecting rod 22 and the plate-like body 31 need to rotate relative to each other. If the connecting rod 22 and the pressing portion 21 are an integral structure, after the top rod 52 passes through the first through-hole 23 of the pressing portion 21 and the connecting rod 22 passes through the second through-hole 53 of the mounting portion 51, the plate-like body 31 of the sealing support 3 is brought close to the lower end of the connecting rod 22 and rotated. The sealing support 3 is arranged so that the plate-like body 31 is threadedly fixed to the connecting rod 22; if the connecting rod 22 and the pressing portion 21 are a split structure, the connecting rod 22 and the pressing portion 21 can be threadedly fixed first, and then the above operation can be performed; alternatively, the connecting rod 22 and the plate-like body 31 can be threadedly fixed first, and then the ejector pin split 5 is sleeved on the outer periphery of the connecting rod 22, and then the pressing portion 21 is sleeved on the outer periphery of the ejector pin 52, and finally the connecting rod 22 and the plate-like body 31 are rotated to thread the connecting rod 22 and the pressing portion 21.

[0109] Based on the above structure, as shown in the attached Figure 7 As shown, when the sealing support 3 is in the first position, the push rod 52 pushes the non-return mechanism 64 to release the sealing of the non-return mechanism 64 on the joint 61, and the groove bottom 1211 of the installation groove 121 is connected with the inside of the joint 61 through the second through-hole 53 and the first through-hole 23, that is, the upstream interface 122 and the downstream interface 123 of the first base 12 are connected with the inside of the filter assembly 6; as shown in the attached Figure 8 As shown, when the sealing support 3 is in the second working position, the top rod 52 is separated from the non-return mechanism 64, and the non-return mechanism 64 seals the joint 61 to prevent the residual liquid inside the filter assembly 6 from overflowing. At the same time, the sealing support 3 seals the bottom 1211 of the installation groove 121 to prevent the residual liquid in the first base 12 from spraying upward from each installation groove 121 under the action of the pressure difference.

[0110] The axial projections of the pressing portion 21 and the mounting portion 51 at least partially overlap, which specifically means that the shapes of the mounting portion 51 and the pressing portion 21 enable the mounting portion 51 to have an area in contact with the pressing portion 21. Fig. 9 and attached Fig.10As shown, the pressing portion 21 is an arc structure and a connecting rib 212 connected to the inner wall of the arc structure, the mounting portion 51 also includes an annular structure 511 and two extension ribs 512 extending from the inner wall of the annular structure 511. The annular structure 511 enables the mounting portion 51 to be stably axially positioned at the groove bottom 1211, and the mounting groove 121 also forms a radial limit for the annular structure 511. At the same time, the contact area between the mounting portion 51 and the pressing portion 21 is increased, so that the pressing portion 21 is more stable when in contact with the mounting portion 51, and the downward force of the joint 61 is better transmitted to the sealing support 3, while ensuring the flow area of ​​the liquid. The ends of the two extending ribs 512 are arranged at intervals, and the annular structure 511 and the two extending ribs 512 are arranged to form a second through-portion 53. The annular structure 511 of the mounting portion 51 corresponds to the arc structure of the pressing portion 21, and the inner wall of the mounting groove 121 is used to form a radial limit for the annular structure 511 and the arc structure, thereby further improving the stability of the pressing portion 21 in the mounting groove 121, ensuring that the pressing portion 21 does not deviate when moving axially in the mounting groove 121, and ensuring the transmission of force from the pressing portion 21 to the sealing support 3, so that the working position of the sealing support 3 can correspond to the conduction or sealing of the joint 61 of the filter assembly 6, that is, the state of the joint 61 matches the conduction or sealing of the groove bottom 1211 of the mounting groove 121.

[0111] As attached Fig.10 As shown, the push rods 52 include two push rods 52, which are respectively located at the ends of the two extension ribs 512. The two push rods 52 are arranged at an interval, and the interval forms a space for the connecting rod 22 to pass through, and the space serves as a part of the second through portion 53. Fig. 9 As shown, the connecting rod 22 passes through the ends of the two extension ribs 512 and is fixedly connected to the plate-like body 31 of the sealing support 3. A radial gap is set between the connecting rod 22 and the ejector rod 52 to avoid interference with each other when the pressing body 2 moves relative to the ejector split body 5, thereby ensuring that the pressing body 2 can smoothly perform axial movement relative to the ejector split body 5.

[0112] As attached Figure 7 As shown, when the sealing support 3 is in the first position, the pressing portion 21 and the mounting portion 51 are axially abutted, and the push rod 52 pushes the anti-return mechanism 64 to release the sealing of the anti-return mechanism 64 on the joint 61; Figure 8 As shown, when the sealing support 3 is in the second station, the pressing portion 21 is separated from the mounting portion 51, and the axial distance therebetween is H3, H3=H1; the top end of the push rod 52 is separated from the non-return mechanism 64, and the axial distance therebetween is H4, H4<H3, thereby ensuring that when the sealing support 3 moves from the second station to the first station, the push rod 52 can push the non-return mechanism 64, and when moving from the first station to the second station, the push rod 52 is first separated from the non-return mechanism 64, and the non-return mechanism 64 seals the joint 61. At the same time, the joint 61 has not left the mounting groove 121.

[0113] During the process of inserting the two joints 61 of the filter assembly 6 into the respective mounting grooves 121 of the first base 12, the two joints 61 of the filter assembly 6 first form a seal with the side walls of the respective mounting grooves 121; then the two joints 61 contact and press down the pressing body 2, so that its sealing ring 32 is separated from the groove bottom 1211 of the mounting groove 121, and the groove bottom 1211 of each mounting groove 121 can achieve liquid flow; the filter assembly 6 continues to be inserted downward, and the non-return head of the non-return mechanism 64 inside its joint 61 begins to contact the push rod 52 of the ejector pin split 5. Since the position of the ejector pin split 5 is fixed, during the downward movement of the filter assembly 6, the push rod 52 of the ejector pin split 5 will push up the non-return head, thereby achieving communication between the joints 61 of the filter assembly 6 and the internal cavity of the shell 62 and the inside of the filter element 63.

[0114] During disassembly, after the first cylinder 11 is removed, the axial downward pressing effect of the filter assembly 6 on the pressing body 2 is reduced, and the driving member 4, i.e., the spring 41, tends to recover its original length and increases in length, pushing the sealing support 3 and the pressing body 2 upward. The sealing ring 32 first seals the bottom 1211 of the mounting groove 121, and the pressing body 2 pushes the filter assembly 6 upward. The filter assembly 6 is partially ejected, and parts of each joint 61 are moved out of each mounting groove 121. The push rod 52 of the ejector pin split 5 no longer pushes the check head upward, so that the check head seals the two joints 61, and only after the check head seals the two joints 61, the filter assembly 6 is completely removed from the first base 12.

[0115] Of course, in other embodiments, the mounting portion 51 may be in other shapes; specifically, in the first embodiment, a plurality of different shapes of the pressing portion 21 are listed, and the mounting portion 51 may also be in a corresponding shape, that is, a straight rod-shaped structure, a plurality of straight rods or a circular arc structure distributed radially, etc. If the mounting portion 51 is in the shape of a straight rod-shaped structure, the lower surfaces of both ends thereof abut against the positioning surface, and the push rod 52 is arranged on the upper surface of the straight rod-shaped structure. If there are two push rods 52, the two push rods 52 are arranged at intervals and are respectively placed in the first through-portions 23 on both sides of the pressing portion 21 of the straight rod-shaped structure, and the center of the mounting portion 51 is It has a through hole for the connecting rod 22 to pass through, and the through hole is also a part of the second through portion 53. At this time, the central upper surface of the mounting portion 51 contacts the central lower surface of the pressing portion 21; if the mounting portion 51 is in the shape of a plurality of radially distributed straight rods, the push rod 52 is arranged on the upper surface of the straight rod, and the straight rods of the mounting portion 51 and the pressing portion 21 are staggered with each other so that the push rod 52 is placed in the first through portion 23 of the pressing portion 21. At the same time, a through hole for the connecting rod 22 to pass through is provided in the center of the mounting portion 51, and the through hole is also a part of the second through portion 53. At this time, the central upper surface of the mounting portion 51 contacts the central lower surface of the pressing portion 21. It should be noted that the shapes of the mounting portion 51 and the pressing portion 21 may not correspond. For example, the mounting portion 51 is a straight rod-shaped structure and the pressing portion 21 is a plurality of straight rods, or the pressing portion 21 is a straight rod-shaped structure and the mounting portion 51 is an arc structure. It is sufficient to ensure that the axial projections of the pressing portion 21 and the mounting portion 51 at least partially overlap.

[0116] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A filtering device, comprising a housing and a filtering assembly installed therein, wherein the housing comprises a first cylinder and a first base forming a detachable sealed connection, and the filtering assembly has at least one joint; The first base has a mounting groove for sealing and inserting the joint of the filter assembly, and the bottom of the mounting groove is through; it is characterized in that: A sealing support, a pressing body and a driving member are provided in the first base at a position corresponding to the mounting groove; The pressing body includes a pressing portion and a connecting rod connected as one body, and has a first through portion connected to the inside of the joint, the pressing portion is axially movable in the mounting groove, and its radial outer end can be axially pressed by the joint of the filter assembly; the pressing body is connected to the axial upper end of the sealing support through the connecting rod; The driving member is located on a side of the sealing support away from the pressing body, and can exert an axial upward pushing effect on the sealing support; When the filter assembly is installed in the housing, the joint of the filter assembly exerts an axial downward pressing effect on the pressing portion, thereby pushing the pressing body and the sealing support to synchronously move axially downward and reach the first position of the sealing support, and the sealing support is located axially below the corresponding mounting groove and separated from the groove bottom of the mounting groove, thereby conducting the groove bottom of the mounting groove; When at least part of the joint is moved out of the mounting groove, the driving member exerts an axial upward pushing force on the sealing support, thereby pushing the sealing support and the pressing body to move axially upward synchronously and reach the second working position of the sealing support, and the sealing support seals the bottom of the mounting groove.

2. The filtering device according to claim 1, characterized in that The pressing portion is a straight-line rod-shaped structure, the first through-portions are located on both sides of the straight-line rod-shaped structure, one end of the connecting rod is connected to the straight-line rod-shaped structure, and the other end of the connecting rod passes through the bottom of the mounting groove and is connected to the axial upper end of the sealing support; or, The pressing portion includes a plurality of straight rods distributed radially, each of the straight rods is cross-connected at the center, the first through portion is located between adjacent straight rods, one end of the connecting rod is connected to at least one straight rod, and the other end of the connecting rod passes through the bottom of the mounting groove and is connected to the axial upper end of the sealing support; or, The pressing portion includes an arc structure and a connecting rib connected to the inner wall of the arc structure, the connecting rib extends radially, the first through portion is formed between the area surrounded by the connecting rib and the arc structure, one end of the connecting rod is connected to the connecting rib, and the other end of the connecting rod passes through the bottom of the mounting groove and is connected to the axial upper end of the sealing support.

3. The filtering device according to claim 1 or 2, characterized in that: The driving member is an elastic member, and the sealing support includes a plate-like body, a sealing ring sleeved on its outer circumference and a rod connected to the plate-like body. The elastic member can exert an axial upward pushing force on the rod so that the plate-like body and the sealing ring seal the bottom of the installation groove.

4. The filtering device according to claim 3, characterized in that The axial distance between the first and second positions of the sealing support corresponding to the upper surface of the plate-like body in the axial direction is H1. During the installation or disassembly of the filter assembly, its joint moves axially along the inner wall of the installation groove. The axial height of the area of ​​the installation groove that can provide axial movement of the joint is H2, and H1 is not greater than H2.

5. The filtering device according to claim 3, characterized in that The bottom plate of the first base is provided with an opening at the bottom of the groove corresponding to the installation groove, and the rod portion passes through the opening and at least partially passes through the bottom plate; a limiting support is fixed to the outside of the bottom plate of the first base and the outer periphery of the opening, the elastic member is located in the limiting support, at least part of the rod portion extends into the limiting support and abuts against or is connected to one end of the elastic member, and the other end of the elastic member abuts against or is connected to the inside of the limiting support.

6. The filtering device according to claim 5, characterized in that A gasket and a nut are fixed to the outer periphery of the area where the rod extends out of the opening, the elastic member is a spring, and one end of the spring is sleeved below the nut in the axial direction; The interior of the position limiting support is provided with an insertion rod extending axially upward, at least a portion of the insertion rod is inserted into the groove at the end of the rod portion, and the rod portion can move up and down relative to the axial direction of the insertion rod; The spring is partially wrapped around the outer circumference of the rod portion and partially wrapped around the outer circumference of the insertion rod. Both ends of the spring are respectively against the inner end surfaces of the nut and the limiting support that are opposite to each other.

7. The filtering device according to claim 3, characterized in that The pressing body is integrally formed with the plate-like body through the connecting rod; or, one end of the connecting rod is threadedly connected or clamped with the plate-like body.

8. The filtering device according to any one of claims 3 to 6, characterized in that: A non-return mechanism is also provided in the joint of the filter assembly; An ejector split body is also provided at a position corresponding to the mounting groove in the first base, the ejector split body comprises a mounting portion, an ejector rod connected to the mounting portion, and a second through portion formed in the mounting portion, the ejector split body is located in the mounting groove and axially positioned at the groove bottom of the mounting groove; The pressing body, the sealing support and the ejector split body are provided in a split type, the axial projections of the pressing portion and the mounting portion at least partially overlap, the first through portion is communicated with the second through portion, the ejector rod of the ejector split body passes through the first through portion upward and extends axially, the connecting rod of the pressing body passes through the mounting portion downward and is fixedly connected to the plate-like body of the sealing support, and the pressing body can move up and down axially relative to the ejector split body; When the sealing support is in the first working position, the push rod pushes the non-return mechanism to release the seal of the joint by the non-return mechanism, and the bottom of the installation groove is connected with the inside of the joint through the second through-portion and the first through-portion; when the sealing support is in the second working position, the push rod is separated from the non-return mechanism, and the non-return mechanism seals the joint.

9. The filtering device according to claim 8, characterized in that The mounting portion includes an annular structure and two extending ribs extending from the inner wall of the annular structure toward each other, the ends of the two extending ribs are arranged at intervals, and the annular structure and the two extending ribs are arranged to form the second through portion; The push rods include two push rods, which are respectively located at the ends of the two extension ribs, and the two push rods are arranged at intervals; The connecting rod passes between the ends of the two extending ribs and is fixedly connected to the plate-shaped body of the sealing support. A radial gap is set between the connecting rod and the push rod.

10. The filtering device according to claim 9, characterized in that When the sealing support is in the first position, the pressing portion abuts against the mounting portion axially, and the ejector rod pushes the anti-return mechanism to release the sealing of the joint by the anti-return mechanism; When the sealing support is in the second position, the pressing portion is separated from the mounting portion, and the axial distance therebetween is H3, H3=H1; the top end of the ejector rod is separated from the anti-return mechanism, and the axial distance therebetween is H4, H4<H3.

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