Filters, filtering devices and testing equipment

Abstract

The present application discloses a filter, a filtering device and a detection device, and relates to the field of filtering technology. The filter includes a base assembly, a handle and a fastening assembly. The base assembly is provided with a slot and a first fluid channel. The handle has a mounting end for mounting a filter element assembly, and the mounting end can be inserted into the slot. The fastening assembly is detachably fixedly connected to the base assembly, and the abutting end of the fastening assembly can be inserted into the base assembly and abut the mounting end and / or the filter element assembly in the slot, so as to detachably fix the mounting end and the filter element assembly in the slot. When the filter element assembly is fixed in the slot, it is connected to the first fluid channel and the second fluid channel of the abutting end. The filter provided in the present application adopts a drawer-type design, which allows the filter element assembly to be replaced without moving the fastening assembly and the base assembly to be completely separated, thereby reducing the difficulty of replacing the filter element assembly and making it convenient for users to use.

Description

Technical Field

[0001] The present application relates to the field of filtration technology, and in particular to filters, filtration devices and detection equipment. Background Art

[0002] Existing filter devices with replaceable filter elements primarily consist of a filter element, a mounting base, and a pressure cap. The mounting base typically includes grooves for mounting the filter element and pressure cap, and the mounting base and pressure cap are typically threaded together. During assembly, the pressure cap must be tightened to align the filter element with the bottom of the groove and the pressure cap, respectively, to ensure the device's seal and filtration effectiveness. However, this filter device requires completely loosening the pressure cap and mounting base before the filter element can be replaced, which is inconvenient for users. Summary of the Invention

[0003] The present application provides a filter, a filtering device and a detection device to solve the problem of inconvenience in replacing filter elements in filtering devices in the prior art.

[0004] To solve the above problems, the present application provides: a filter, comprising:

[0005] A base assembly is provided with a slot and a first fluid channel;

[0006] A handle having a mounting end for mounting the filter element assembly, wherein the mounting end can be inserted into the slot;

[0007] A fastening assembly is detachably fixedly connected to the base assembly, and the fastening assembly has an abutting end, which can be inserted into the base assembly and abut against the mounting end and / or the filter element assembly in the slot to detachably fix the mounting end and the filter element assembly in the slot, and a second fluid channel is provided at the abutting end, and the filter element assembly is connected to both the first fluid channel and the second fluid channel when fixed in the slot.

[0008] In a possible embodiment, the mounting end is provided with a through hole for mounting the filter element assembly, and the through hole has two opposite orifices. When the mounting end is inserted into the slot and the abutting end is inserted into the base assembly, one of the orifices is aligned with a channel opening of the first fluid channel, and the other orifice is aligned with a channel opening of the second fluid channel.

[0009] In a possible implementation manner, the abutting end can be partially inserted into the through hole and abut against both the hole wall of the through hole and the filter element assembly.

[0010] In a possible embodiment, a limiting structure is provided between the mounting end and the filter element assembly, and the limiting structure is used to limit the filter element assembly from sliding in a direction from one end to the other end of the through hole.

[0011] In a possible embodiment, the filter also includes the filter element assembly, which includes a fixing seat, a filter element and a fixing member. The fixing seat can be accommodated in the slot, and the fixing seat is provided with a fixing groove for accommodating the filter element. The fixing member is installed on the fixing seat and seals the notch of the fixing groove. The abutting end can be inserted into the base assembly and sealed with the fixing member, and the filter element assembly is clamped between the abutting end and the groove wall of the slot. The fixing seat is provided with a first opening that can connect the filter element and the first fluid channel, and the fixing member is provided with a second opening that can connect the filter element and the second fluid channel.

[0012] In a possible implementation manner, an abutment groove adapted to the position and shape of the fixing member is formed on a side of the abutment end facing the filter element assembly.

[0013] In a possible embodiment, the fastening assembly includes a connector and a top shaft, the base assembly is provided with a threaded groove, the peripheral side of the connector is provided with an external thread that matches the threaded groove, the connecting end of the top shaft is inserted into the connector, the end of the top shaft away from the connecting end is the abutment end, and the second fluid channel extends along the axial direction of the top shaft.

[0014] In a possible implementation manner, the nominal diameter of the external thread is D, and the diameter of the abutting end is d, satisfying d / D≤0.8.

[0015] In a possible embodiment, the connector or the top shaft is provided with a first abutment portion, and the threaded groove is provided with a second abutment portion, and the first abutment portion and the second abutment portion can abut against each other to limit the movement of the fastening assembly toward the filter element assembly.

[0016] In a possible implementation, the fastening assembly further includes a limiting member detachably connected to the connecting end, an abutting protrusion is provided on the circumference of the top shaft, and the connector is located between the limiting member and the abutting protrusion.

[0017] In a possible embodiment, the fastening assembly further includes a clamp and a handle, wherein the clamp is in the shape of a retaining spring and is arranged around the circumference of the connector, and the handle is connected to both opposite ends of the clamp to fix the relative position of the clamp and the connector.

[0018] In a possible implementation, the base assembly is provided with a magnetic member capable of interacting with the mounting end to drive the mounting end to abut against a slot wall of the slot.

[0019] The present application also provides: a filtering device, comprising the filter provided by any of the above embodiments.

[0020] The present application also provides: a detection device, comprising the filter provided by any of the above embodiments or the filtering device provided by any of the above embodiments.

[0021] The beneficial effects of the present application are as follows: the present application proposes a filter, a filtering device and a detection device, wherein when assembling the filter, the filter element assembly can be mounted on the mounting end of the handle, and then the mounting end is inserted into the slot of the base assembly. At the same time, since the fastening assembly and the base assembly are detachably fixed, the fastening assembly can be moved in a direction close to the filter element assembly and fixed, so that the abutting end of the fastening assembly is inserted into the base assembly and abuts against the mounting end and / or the filter element assembly in the slot, thereby detachably fixing the mounting end and the filter element assembly in the slot and connecting the filter element assembly with both the first fluid channel and the second fluid channel. When replacing the filter element assembly, the fastening assembly can be driven by its abutting end to move in a direction away from the filter element assembly to cancel the abutment with the mounting end and / or the filter element assembly, and then the handle is pulled out to replace the filter element assembly. Therefore, a drawer-type design is adopted between the base assembly and the handle on which the filter element assembly is mounted, so that the filter element assembly does not need to be completely separated from the fastening assembly when replacing the filter element assembly, which can reduce the difficulty of replacing the filter element assembly and facilitate user use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic structural diagram of a filter provided by an embodiment of the present invention is shown;

[0024] Figure 2 A schematic cross-sectional view of a filter provided by an embodiment of the present invention is shown;

[0025] Figure 3 Shown Figure 2 Schematic diagram of the local enlarged structure at A in the middle;

[0026] Figure 4 A schematic diagram of the explosion structure of a filter provided by an embodiment of the present invention is shown;

[0027] Figure 5 A further exploded structural diagram of a filter provided by an embodiment of the present invention is shown from one perspective;

[0028] Figure 6 A further exploded structural schematic diagram of a filter provided by an embodiment of the present invention is shown from another perspective.

[0029] Description of main component symbols:

[0030] 100-base assembly; 110-slot; 120-first fluid channel; 130-threaded groove; 140-magnetic member; 150-first joint; 200-fastening assembly; 210-abutment end; 211-second fluid channel; 212-abutment groove; 220-connector; 230-top shaft; 231-connecting end; 232-abutment protrusion; 250-limiting member; 260-pressing device; 270-handle; 280-second joint; 300-handle; 310-mounting end; 320-through hole; 321-step; 400-filter element assembly; 410-limiting protrusion; 420-fixing seat; 421-fixing groove; 422-first opening; 430-filter element; 440-fixing member; 441-second opening. DETAILED DESCRIPTION

[0031] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0034] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0035] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0036] Example 1

[0037] See also Figure 1 and Figure 2 This embodiment provides a filter that can be used in any field that requires filtering impurities in a fluid. For example, the filter can be used in a liquid chromatograph. The filter includes a base assembly 100, a handle 300, and a fastening assembly 200. The base assembly 100 is provided with a slot 110 and a first fluid channel 120. The handle 300 has a mounting end 310 for mounting a filter element assembly 400, and the mounting end 310 can be inserted into the slot 110. The fastening assembly 200 is detachably fixedly connected to the base assembly 100. The fastening assembly 200 has an abutting end 210. The abutting end 210 can be inserted into the base assembly 100 and abut against the mounting end 310 and / or the filter element assembly 400 in the slot 110 to detachably fix the mounting end 310 and the filter element assembly 400 in the slot 110. A second fluid channel 211 is provided on the abutting end 210, and when the filter element assembly 400 is fixed in the slot 110, it is connected to both the first fluid channel 120 and the second fluid channel 211.

[0038] When assembling the filter provided in the embodiment of the present application, the filter element assembly 400 can be installed on the mounting end 310 of the handle 300, and then the mounting end 310 can be inserted into the slot 110 of the base assembly 100. At the same time, since the fastening assembly 200 and the base assembly 100 are detachably fixedly connected, the fastening assembly 200 can be moved in a direction close to the filter element assembly 400 and fixed, so that the abutting end 210 of the fastening assembly 200 is inserted into the base assembly 100 and abuts against the mounting end 310 and / or the filter element assembly 400 in the slot 110, thereby detachably fixing the mounting end 310 and the filter element assembly 400 in the slot 110, and connecting the filter element assembly 400 with the first fluid channel 120 and the second fluid channel 211. When replacing the filter element assembly 400, the fastening assembly 200 can drive its abutting end 210 to move away from the filter element assembly 400 to cancel the abutment with the mounting end 310 and / or the filter element assembly 400, and then the handle 300 can be pulled out to replace the filter element assembly 400. Therefore, a drawer-type design is adopted between the base assembly 100 and the handle 300 on which the filter element assembly 400 is installed, so that when replacing the filter element assembly 400, there is no need to move the fastening assembly 200 and the base assembly 100 to be completely separated, which can reduce the difficulty of replacing the filter element assembly 400 and facilitate user use.

[0039] At the same time, it should be noted that the filter element assembly 400 and the handle 300 of the filter provided in this application are easy to disassemble, so the filter and filter element assembly 400 provided in this application, which include the base assembly 100, the handle 300 and the fastening assembly 200, can be independent of each other during production, sales, etc.

[0040] Optionally, the detachable fixed connection between the fastening assembly 200 and the base assembly 100 is a threaded connection. The threaded connection between the two enables the fastening assembly 200 to be moved relative to the base assembly 100 by twisting the fastening assembly 200, so that the fastening assembly 200 can drive the abutting end 210 to move toward or away from the filter element assembly 400, so as to achieve abutment between the abutting end 210 and the mounting end 310 and / or the filter element assembly 400, or cancel the abutment between the abutting end 210 and the mounting end 310 and / or the filter element assembly 400, and the operation is simple. It can be understood that the detachable fixed connection between the fastening assembly 200 and the base assembly 100 is not limited to a threaded connection, and can also be other detachable fixed connection methods, such as a sliding connection, and the positioning is achieved by friction on the sliding surface of the sliding connection or by providing a limiter on the sliding surface of the sliding connection.

[0041] When the mounting end 310 is inserted into the slot 110, the mounting end 310 can drive the filter element assembly 400 to move synchronously, so that the filter element assembly 400 corresponds to the position of the first fluid channel 120 and the second fluid channel 211, respectively. Therefore, the filter element assembly 400 can be installed on the mounting end 310 using any detachable connection method that can achieve synchronous movement of the mounting end 310 and the filter element assembly 400, and this detachable connection method does not affect the sealed connection between the filter element assembly 400 and the slot 110 wall and the abutment end 210, respectively. Specifically, the detachable connection method can adopt, for example, a magnetic connection method or a retaining structure such as a groove and / or a protrusion.

[0042] A first connector 150 may be inserted into the side of the base assembly 100 away from the fastening assembly 200. When inserted into the base assembly 100, the first connector 150 communicates with the first fluid channel 120. The first connector 150 may be used to connect to other external components (e.g., a source of liquid to be filtered or a component that uses the filtered liquid). For example, the source of the filtered liquid may pass through the first connector 150 and enter the filter for filtration. Other external components may also include downstream detection components or a filtered liquid collector, for example. The filtered liquid may pass through the first connector 150 and enter the downstream detection component for testing or enter the filtered liquid collector for storage.

[0043] The base assembly 100 may include an upper seat and a lower seat, which may be assembled using a detachable connection method such as a bolt connection. A slot 110 may be formed between the upper seat and the lower seat. The abutting end 210 of the fastening assembly 200 may be inserted into the upper seat and abut the filter element assembly 400 within the slot 110, and the first fluid channel 120 may be correspondingly disposed within the lower seat. Furthermore, a positioning pin may be provided between the upper seat and the lower seat to prevent errors during assembly of the upper and lower seats.

[0044] Example 2

[0045] like Figure 3 and 4 As shown, in this embodiment, based on the first embodiment, the mounting end 310 is provided with a through hole 320 for mounting the filter element assembly 400, and the through hole 320 has two opposite orifices. When the mounting end 310 is inserted into the slot 110 and the abutting end 210 is inserted into the base assembly 100, one of the orifices is aligned with a channel opening of the first fluid channel 120, and the other orifice is aligned with a channel opening of the second fluid channel 211.

[0046] Specifically, by installing the filter element assembly 400 in the through hole 320 of the installation end 310, a detachable connection between the filter element assembly 400 and the installation end 310 is achieved, which can facilitate assembly and disassembly.

[0047] In some embodiments, the diameter, shape and other parameters of the through hole 320 can be set to match the filter element assembly 400, so that the hole wall of the through hole 320 can fit the filter element assembly 400 or form an interference fit between the two. Under this setting, since the hole wall of the through hole 320 surrounds the filter element assembly 400, the hole wall of the through hole 320 can limit the position of the filter element assembly 400 in a direction parallel to the cross section of the through hole 320, and when the mounting end 310 is inserted into the slot 110 and the abutting end 210 is inserted into the base assembly 100, the first fluid channel 120 and the second fluid channel 211 each have a channel opening close to the filter element assembly 400 corresponding to the positions of the two opposite hole openings of the through hole 320 respectively. Therefore, the setting of the through hole 320 enables the filter element assembly 400 to be precisely aligned with the first fluid channel 120 and the second fluid channel 211 to achieve communication.

[0048] In some embodiments, the cross-sectional diameter of the abutting end 210 can be larger than the inner diameter of the through-hole 320. This arrangement allows the abutting end 210 to sealably abut against the edge of the through-hole 320. A sealed liquid-containing cavity can then be formed between the wall of the through-hole 320, the end surface of the abutting end 210, and the filter element assembly 400, thereby preventing fluid leakage between the abutting end 210 and the mounting end 310. Similarly, when the mounting end 310 is subjected to pressure from the abutting end 210, causing the edge of the through-hole 320 near the first fluid channel 120 to abut against the wall of the slot 110, a sealed liquid-containing cavity can also be formed between the wall of the through-hole 320, the wall of the slot 110, and the filter element assembly 400, thereby preventing fluid leakage between the wall of the slot 110 and the mounting end 310. Therefore, the arrangement of the through-hole 320 facilitates improved sealing performance.

[0049] It should be noted that the cross-sectional diameter of the abutting end 210 is not limited to being larger than the inner diameter of the through hole 320. Figure 3 As shown, optionally, in the illustrated embodiment, the abutting end 210 can be at least partially inserted into the through hole 320 and abut against both the hole wall of the through hole 320 and the filter element assembly 400 .

[0050] Specifically, the cross-sectional diameter of the abutting end 210 can be set to be less than or equal to the inner diameter of the through hole 320. Under this setting, when the installation end 310 drives the filter element assembly 400 to be inserted into the slot 110 so that the filter element assembly 400 is in the correct position, the abutting end 210 can be inserted into the through hole 320 and abut against the hole wall of the through hole 320 and the filter element assembly 400 respectively. At this time, the abutting end 210 is exactly at the preset depth. Conversely, when the installation end 310 drives the filter element assembly 400 to be inserted into the slot 110 but the filter element assembly 400 is not in the correct position, the abutting end 210 cannot be inserted into the through hole 320 and can only abut against the edge of the through hole 320. At this time, the abutting end 210 cannot be exactly at the preset depth. Therefore, during assembly, it is possible to determine whether the abutment end 210 can just reach the preset depth to determine whether the filter element assembly 400 corresponds to the position of the abutment end 210 and whether the abutment end 210 abuts against the filter element assembly 400, thereby determining whether the filter element assembly 400 is installed in place.

[0051] A guide surface such as a rounded corner or chamfer may be provided between the edge of the through hole 320 near the abutting end 210 and the hole wall thereof, so that the abutting end 210 can slide along the guide surface into the through hole 320. An interference fit may be employed between the abutting end 210 and the hole wall of the through hole 320, thereby improving the sealing between the abutting end 210 and the hole wall of the through hole 320 and further enhancing the filter's ability to withstand relatively high air or hydraulic pressures.

[0052] In the above embodiment, optionally, a limiting structure is provided between the mounting end 310 and the filter element assembly 400 , and the limiting structure is used to limit the filter element assembly 400 from sliding along the direction from one end to the other end of the through hole 320 .

[0053] Specifically, the retaining structure may include a first retaining portion provided at the mounting end 310 and a second retaining portion provided at the filter element assembly 400. The first retaining portion and the second retaining portion may abut against each other, thereby securing the filter element assembly 400 within the through hole 320 and preventing the filter element assembly 400 from sliding out of the through hole 320 due to gravity, thereby facilitating installation. Furthermore, the first retaining portion and the second retaining portion may also be used to restrict the filter element assembly 400 from rotating circumferentially along the through hole 320.

[0054] like Figure 3 As shown, in the above embodiment, optionally, the through hole 320 is a stepped hole, the first limiting portion is a step 321 on the hole wall of the through hole 320, and the second limiting portion is a limiting protrusion 410 provided on the circumference of the filter element assembly 400. The limiting protrusion 410 and the step 321 can abut against each other to prevent the filter element assembly 400 from sliding out of the through hole 320 along the direction of gravity. In the illustrated embodiment, the limiting protrusion 410 is annular and is provided around the circumference of the filter element assembly 400. When the limiting protrusion 410 abuts against the step 321, the limiting protrusion 410 is located on the side of the step 321 close to the abutting end 210.

[0055] It can be understood that the limiting structure is not limited to the specific structure mentioned above, and can also be other limiting structures. For example: one of the filter element assembly 400 and the hole wall of the through hole 320 is provided with a limiting groove, and the other is provided with a limiting block corresponding to the limiting groove. The limiting block can be inserted into the limiting groove to limit the filter element assembly 400 from sliding in the direction from one end to the other end of the through hole 320; for example: the filter element assembly 400 and the hole wall of the through hole 320 are limited by interference fit, etc.

[0056] Example 3

[0057] like Figure 3 and Figure 4 As shown, this embodiment, based on the first or second embodiment, proposes a configuration method for the filter element assembly 400. Optionally, the filter further includes a filter element assembly 400, which includes a fixing seat 420, a filter element 430, and a fixing member 440. The fixing seat 420 can be received in the slot 110, and the fixing seat 420 defines a fixing groove 421 for receiving the filter element 430. The fixing member 440 is mounted on the fixing seat 420 and seals the notch of the fixing groove 421. The abutting end 210 can be inserted into the base assembly 100 and sealedly connected to the fixing member 440, so that the filter element assembly 400 is clamped between the abutting end 210 and the slot wall of the slot 110. The fixing seat 420 defines a first opening 422 that can connect the filter element 430 and the first fluid channel 120. The fixing member 440 defines a second opening 441 that can connect the filter element 430 and the second fluid channel 211.

[0058] In the above embodiment, by providing a fixing groove 421 on the fixing base 420, it is convenient to fix and assemble the filter element 430 and the fixing member 440. The filter element 430 is sealed in the fixing groove 421 by the fixing base 420 and the fixing member 440. Compared with a conventional single filter element, its mechanical strength is higher and it can withstand greater fluid flow rates and pressures. During filtration, the fluid can flow through the first fluid channel 120, the first opening 422, the filter element 430, the second opening 441, and the second fluid channel 211 in sequence. Of course, it is understood that the direction of liquid flow during filtration is not limited to the direction indicated above. The fluid can also flow through the second fluid channel 211, the second opening 441, the filter element 430, the first opening 422, and the first fluid channel 120 in sequence.

[0059] Specifically, in the illustrated embodiment, the fixing member 440 is partially received in the fixing groove 421 and is sealed against the groove wall of the fixing groove 421, thereby clamping the filter element 430 between the fixing member 440 and the groove bottom of the fixing groove 421. When the abutting end 210 is in sealing contact with the fixing member 440, the clamping force of the fixing member 440 and the groove bottom of the fixing groove 421 on the filter element 430 is increased, thereby improving the sealing performance of the interior of the filter element assembly 400.

[0060] Example 4

[0061] like Figure 3 As shown, this embodiment, based on the third embodiment, proposes a configuration method for the fastening assembly 200. Optionally, the abutting end 210 is provided with an abutting groove 212 that matches the shape and position of the fixing member 440. When the abutting end 210 and the fixing member 440 are in sealing contact, the fixing member 440 can be inserted into the abutting groove 212.

[0062] By providing the abutment groove 212, the fixing member 440 can be inserted into the abutment groove 212 when it abuts the abutment end 210, thereby accurately aligning the second opening 441 of the fixing member 440 with the second fluid channel 211. At the same time, the shape of the abutment groove 212 matches that of the fixing member 440, which improves the sealing between the fixing member 440 and the groove wall of the abutment groove 212. In addition, when the fixing member 440 and the filter element 430 are made of elastic material, when the pressure applied by the abutment end 210 is too great, the fixing member 440 and the filter element 430 can be slightly compressed, and the edge of the abutment groove 212 can abut against the fixing seat 420, thereby further improving the sealing performance.

[0063] Specifically, the abutting groove 212 may be located on the end surface of the abutting end 210 facing the filter element assembly 400 .

[0064] like Figure 3 As shown, in the above embodiment, optionally, a rounded corner or chamfer may be provided between the sidewall of the abutting groove 212 and the edge of the abutting groove 212. The fixing member 440 may slide into the abutting groove 212 along the rounded corner or chamfer of the abutting groove 212, thereby improving the alignment efficiency between the fixing member 440 and the abutting groove 212.

[0065] like Figure 2 and Figure 4 As shown, in the above embodiment, the fastening assembly 200 optionally includes a connector 220 and a top shaft 230. The base assembly 100 is provided with a threaded groove 130, and the circumference of the connector 220 is provided with external threads that mate with the threaded groove 130 to achieve a threaded connection between the base assembly 100 and the fastening assembly 200. The connecting end 231 of the top shaft 230 is inserted into the connector 220, and the end of the top shaft 230 away from the connecting end 231 is the abutting end 210. The second fluid channel 211 extends along the axial direction of the top shaft 230.

[0066] Specifically, during assembly, the connector 220 and the top shaft 230 can be inserted into the threaded groove 130 of the base assembly 100 and the connector 220 can be rotated, causing the connector 220 to drive the top shaft 230 toward the slot 110. When the connection end 231 is fixedly inserted into the connector 220, the connection end 231 can be exposed outside the connector 220 to facilitate communication between an external device and the end of the second fluid channel 211 near the connection end 231. For example, the second connector 280 can be inserted into the connection end 231 of the top shaft 230 and communicate with the second fluid channel 211.

[0067] like Figure 3 As shown, in the above embodiment, optionally, the nominal diameter of the external thread of the connector 220 is D, and the diameter of the abutting end 210 is d, satisfying d / D ≤ 0.8. Under the premise that the contact force area between the external thread of the connector 220 and the thread groove 130 is constant, this arrangement can reduce the force area between the abutting end 210 and the filter element assembly 400, thereby increasing the pressure on the contact surface between the abutting end 210 and the filter element assembly 400, so that the filter can withstand greater fluid pressure, for example, the filter can withstand fluid pressure exceeding 35 MPa.

[0068] like Figure 2 As shown, in the above embodiment, optionally, the connector 220 or the top shaft 230 is provided with a first abutment portion, and the threaded groove 130 is provided with a second abutment portion, and the first abutment portion and the second abutment portion can abut against each other to limit the fastening assembly 200 from moving in a direction close to the filter element assembly 400.

[0069] Specifically, during movement of the fastening assembly 200 toward the filter element assembly 400, the first abutting portion and the second abutting portion can abut against each other, thereby limiting the abutting end 210 of the fastening assembly 200 from further movement toward the filter element assembly 400. This limits the maximum pressure exerted by the abutting end 210 on the filter element assembly 400, reduces the risk of damage to the filter element assembly 400 due to excessive compression, and extends its service life. Furthermore, for a filter element assembly 400 having a certain elasticity, the first abutting portion and the second abutting portion can only abut when the pressure exerted by the abutting end 210 on the filter element assembly 400 reaches a certain value (i.e., when the filter element assembly 400 is in a certain degree of compression). This arrangement ensures that the pressure exerted by the abutting end 210 on the filter element assembly 400 is within an appropriate range, thereby alleviating the problem of insufficient pressure between the abutting end 210 and the filter element assembly 400 affecting sealing performance and the problem of excessive compression of the filter element assembly 400. The first abutting portion and the second abutting portion may respectively adopt limiting structures such as protrusions and grooves according to actual conditions.

[0070] In the above embodiment, optionally, the first abutting portion is the end surface of the external thread of the connector 220 close to the filter element assembly 400, and the second abutting portion is the end surface of the internal thread of the thread groove 130 close to the filter element assembly 400. When the external thread of the connector 220 and the thread groove 130 are tightened against each other, that is, when the first abutting portion and the second abutting portion abut against each other, the top shaft 230 can be restricted from further movement toward the filter element assembly 400.

[0071] In the above embodiment, the internal threads of the thread groove 130 and the external threads of the connector 220 can optionally be double-start threads. Double-start threads increase the distance that the top shaft 230 moves when the connector 220 is turned one turn, facilitating quick installation and removal of the fastening assembly 200. Furthermore, compared to single-start threads, double-start threads increase the force-bearing surface area when the external and internal threads abut against each other, thereby improving deformation of the force-bearing surface due to excessive pressure and extending service life.

[0072] like Figure 4 and Figure 5 As shown, in the above embodiment, optionally, the fastening assembly 200 also includes a limiting member 250 detachably connected to the connecting end 231 , an abutment protrusion 232 is provided on the circumference of the top shaft 230 , and the connector 220 is located between the limiting member 250 and the abutment protrusion 232 .

[0073] Specifically, during assembly, the connection end 231 can be passed through the connector 220, and the limiting member 250 can be detachably connected to the connection end 231, so that the limiting member 250 cooperates with the abutting protrusion 232 to limit the connector 220 in the axial direction of the top shaft 230. The limiting member 250 can be a retaining spring, and the connection end 231 can be provided with a groove for retaining the retaining spring.

[0074] like Figure 5 and Figure 6 As shown, in the above embodiment, optionally, the fastening assembly 200 also includes a clamp 260 and a handle 270. The clamp 260 is in the shape of a retaining spring and is arranged around the peripheral side of the connector 220. The handle 270 is connected to both opposite ends of the clamp 260 to fix the relative position of the clamp 260 and the connector 220.

[0075] Specifically, during assembly, the compressor 260 is positioned around the connector 220, and the handle 270 is connected to both opposing ends of the compressor 260, so that the compressor 260 and the connector 220 abut against each other, thereby securing the relative positions of the compressor 260 and the connector 220 through friction. This arrangement also facilitates production personnel in adjusting the orientation of the handle 270 around the connector 220 during assembly, ensuring that the orientation of the handle 270 remains consistent across the entire production batch, improving product consistency.

[0076] Example 5

[0077] like Figure 5 and Figure 6 As shown, this embodiment further defines the technical solution based on the first to fourth embodiments. In the above embodiments, the base assembly 100 is optionally provided with a magnetic member 140 capable of interacting with the mounting end 310 to drive the mounting end 310 to abut against the groove wall of the slot 110, thereby causing the filter element assembly 400 to correspond to the position of the first fluid channel 120 and the second fluid channel 211, respectively.

[0078] The above arrangement enables that when the mounting end 310 is inserted into the slot 110, the mounting end 310 slides in the direction close to the magnetic part 140 under the action of the magnetic part 140 and abuts against the groove wall of the slot 110. At this time, the filter element assembly 400 on the mounting end 310 can be accurately aligned with the second fluid channel 211. This arrangement can improve the alignment efficiency. Among them, the interaction can be a magnetic attraction. Specifically, the mounting end 310 can be made of iron, cobalt, nickel and other materials that can be magnetically attracted to the magnetic part 140, or a magnet or other magnetic material can be set. It should be noted that the interaction is not limited to magnetic attraction, but can also be a magnetic repulsion.

[0079] like Figure 5 and Figure 6 As shown, in the above embodiment, optionally, the direction of the force generated by the magnetic attraction between the magnetic member 140 and the mounting end 310 is substantially parallel to the sliding direction of the handle 300 when inserted into the slot 110. This arrangement allows the mounting end 310 to be quickly installed when the magnetic member 140 is located in the sliding direction of the handle 300, thereby facilitating assembly and improving assembly efficiency.

[0080] In the above embodiment, a drain hole is optionally provided on the bottom surface of the slot 110. The drain hole allows impurities remaining in the slot 110 to be flushed and discharged through the drain hole when the slot 110 is flushed, thereby improving cleaning efficiency.

[0081] Example 6

[0082] Another embodiment of the present application provides a filtering device, comprising the filter in any of the above embodiments.

[0083] The filtering device provided in the embodiment of the present application has the filter provided in any of the above embodiments, and therefore has all the beneficial effects of the filter provided in any of the above embodiments, which will not be described in detail here.

[0084] Example 7

[0085] Another embodiment of the present application provides a detection device, including the filter in any of the above embodiments; or the filtering device in embodiment six.

[0086] The type of detection equipment is not limited, and may be, for example, a liquid chromatograph, a glycated hemoglobin analyzer, or other equipment that may require filtration.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0088] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A filter, characterized in that: include: A base assembly is provided with a slot and a first fluid channel; A handle having a mounting end for mounting the filter element assembly, wherein the mounting end can be inserted into the slot; a fastening assembly detachably fixedly connected to the base assembly, the fastening assembly having an abutting end capable of being inserted into the base assembly and abutting against the mounting end and / or the filter element assembly in the slot to detachably secure the mounting end and the filter element assembly in the slot, the abutting end defining a second fluid passage, the filter element assembly being in communication with both the first fluid passage and the second fluid passage when secured in the slot; The mounting end is provided with a through hole for mounting the filter element assembly, the through hole having two opposing openings. When the mounting end is inserted into the slot and the abutting end is inserted into the base assembly, one of the openings is aligned with a channel opening of the first fluid channel, and the other opening is aligned with a channel opening of the second fluid channel. A limiting structure is provided between the mounting end and the filter element assembly, the limiting structure being used to limit the sliding of the filter element assembly along the direction from one end to the other end of the through hole; The filter further comprises the filter element assembly, the filter element assembly comprising a fixing seat, a filter element and a fixing member, the fixing seat being receivable in the slot, the fixing seat being provided with a fixing groove for accommodating the filter element, the fixing member being mounted on the fixing seat and sealing the notch of the fixing groove, the abutting end being insertable in the base assembly and sealingly connected to the fixing member, and the filter element assembly being clamped between the abutting end and the slot wall of the slot, the fixing seat being provided with a first opening capable of communicating the filter element and the first fluid channel, and the fixing member being provided with a second opening capable of communicating the filter element and the second fluid channel; A first connector is inserted into a side of the base assembly away from the fastening assembly.

2. The filter according to claim 1, characterized in that The abutting end can be at least partially inserted into the through hole and abut against both the hole wall of the through hole and the filter element assembly.

3. The filter according to claim 1, characterized in that An abutment groove matching the position and shape of the fixing member is formed on one side of the abutment end facing the filter element assembly.

4. The filter according to claim 1, characterized in that The fastening assembly includes a connector and a top shaft. The base assembly is provided with a threaded groove. The peripheral side of the connector is provided with an external thread that matches the threaded groove. The connecting end of the top shaft is inserted into the connector. The end of the top shaft away from the connecting end is the abutting end. The second fluid channel extends along the axial direction of the top shaft.

5. The filter according to claim 4, characterized in that The nominal diameter of the external thread is D, and the diameter of the abutting end is d, satisfying d / D≤0.

8.

6. The filter according to claim 4, characterized in that The connector or the top shaft is provided with a first abutting portion, and the threaded groove is provided with a second abutting portion. The first abutting portion and the second abutting portion can abut against each other to limit the fastening assembly from moving in a direction close to the filter element assembly.

7. The filter according to claim 4, characterized in that The fastening assembly further includes a limiting member detachably connected to the connecting end, an abutting protrusion is provided on the circumference of the top shaft, and the connector is located between the limiting member and the abutting protrusion.

8. The filter according to any one of claims 4 to 7, characterized in that The fastening assembly further includes a clamp and a handle. The clamp is in the shape of a retaining spring and is disposed around the circumference of the connector. The handle is connected to both opposite ends of the clamp to fix the relative position of the clamp and the connector.

9. The filter according to claim 1, characterized in that The base assembly is provided with a magnetic member capable of interacting with the mounting end to drive the mounting end to abut against the slot wall of the slot.

10. A filtering device, characterized in that: A filter comprising the filter according to any one of claims 1 to 9.

11. A detection device, characterized in that: The filter comprises the filter according to any one of claims 1 to 9, or the filtering device according to claim 10.

Images