CN115400485B - Filter, design method thereof and analyzer - Google Patents

Filter, design method thereof and analyzer Download PDF

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Publication number
CN115400485B
CN115400485B CN202211031477.7A CN202211031477A CN115400485B CN 115400485 B CN115400485 B CN 115400485B CN 202211031477 A CN202211031477 A CN 202211031477A CN 115400485 B CN115400485 B CN 115400485B
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China
Prior art keywords
filter
movable sleeve
piece
channel
pressure storage
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CN202211031477.7A
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CN115400485A (en
Inventor
康军辉
杨文创
谭伟强
刘军红
王铮
刘先成
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Lifotronic Technology Co ltd
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Lifotronic Technology Co ltd
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Priority to CN202211031477.7A priority Critical patent/CN115400485B/en
Publication of CN115400485A publication Critical patent/CN115400485A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/0093—Making filtering elements not provided for elsewhere
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D37/00—Processes of filtration
    • B01D37/04—Controlling the filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/30—Filter housing constructions
    • B01D2201/301—Details of removable closures, lids, caps, filter heads
    • B01D2201/305—Snap, latch or clip connecting means

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)

Abstract

The application relates to a filter, a design method thereof and an analyzer, wherein the filter comprises a pressure storage mechanism, a compression mechanism, a filter element and an elastic element, wherein a first channel penetrating the pressure storage mechanism is arranged in the pressure storage mechanism, the compression mechanism is movably connected with the pressure storage mechanism, a second channel communicated with the first channel and penetrating the compression mechanism is arranged in the compression mechanism, the filter element is arranged between the pressure storage mechanism and the compression mechanism and is positioned between the first channel and the second channel, the filter element is used for filtering fluid flowing from the first channel to the second channel, the elastic element is arranged in the pressure storage mechanism, and the elastic element is configured to provide a compression force for compressing the filter element between the pressure storage mechanism and the compression mechanism. The filter filters the fluid flowing from the first channel to the second channel through the filter element, and the elastic element is arranged to provide a pressing force for pressing the filter element between the pressure storage mechanism and the pressing mechanism, so that the fluid is prevented from leaking from between the filter element and the pressure storage mechanism or from between the filter element and the pressing mechanism.

Description

Filter, design method thereof and analyzer
Technical Field
The application relates to the technical field of medical equipment, in particular to a filter, a design method thereof and an analyzer.
Background
When HPLC (High Performance Liquid Chromatography high performance liquid chromatography) is used to test the glycosylated hemoglobin content of blood, it is necessary to intercept and filter the particles in the sample before the sample enters the chromatographic column, so as to make the measurement value accurate and prolong the service life of the chromatographic column. For this reason, a filter for filtering a sample is provided in the related art, and leakage of the sample is prevented by means of an end face seal.
However, the filter of the related art has a problem in that it is difficult to determine the pressure of the sealing surface, resulting in easy leakage of the sample.
Disclosure of Invention
Based on this, it is necessary to provide a filter which makes a sample less likely to leak, a design method thereof, and an analyzer, in order to solve the problem that it is difficult for the filter to determine the pressure of the sealing surface in the related art, which makes the sample likely to leak.
According to one aspect of the present application, there is provided a filter comprising:
the pressure storage mechanism is internally provided with a first channel penetrating through the pressure storage mechanism;
the compressing mechanism is movably connected with the pressure storage mechanism, and a second channel which is communicated with the first channel and penetrates through the compressing mechanism is arranged in the compressing mechanism;
the filter piece is arranged between the pressure storage mechanism and the pressing mechanism and between the first channel and the second channel, and is used for filtering fluid flowing from the first channel to the second channel; and
and the elastic piece is arranged in the pressure storage mechanism and is configured to provide a pressing force for pressing the filter piece between the pressure storage mechanism and the pressing mechanism.
The filter is communicated with the second channel in the pressing mechanism through the first channel in the pressure storage mechanism, and the filter element is arranged between the first channel and the second channel so as to filter fluid flowing from the first channel to the second channel through the filter element. By arranging the elastic piece in the pressure storage mechanism, the elastic piece provides a pressing force for pressing the filter piece between the pressure storage mechanism and the pressing mechanism, so that the filter piece is respectively clung to the pressure storage mechanism and the pressing mechanism, and fluid leakage from between the filter piece and the pressure storage mechanism or between the filter piece and the pressing mechanism is prevented.
In one embodiment, the pressure storage mechanism comprises a fixed seat connected with the pressing mechanism and a first abutting piece movably penetrating through the fixed seat along a first direction of the pressure storage mechanism pointing to the pressing mechanism, and the first abutting piece abuts against one side of the filter piece along the first direction;
the first channel penetrates through the first abutting piece along the first direction;
the elastic piece is arranged between the first abutting piece and the fixing seat, so that the pressing force for pressing the filtering piece between the pressure storage mechanism and the pressing mechanism is provided.
In one embodiment, the pressing mechanism includes a movable sleeve at least partially sleeved outside the fixed seat, and a second abutting piece penetrating through the movable sleeve along the first direction, wherein the second abutting piece abuts against one side, away from the first abutting piece, of the filtering piece along the first direction;
the second passage penetrates the second abutment in the first direction.
In one embodiment, the fixing seat comprises a threaded part penetrating through the movable sleeve and a blocking part connected with the threaded part;
the thread part is in threaded connection with the movable sleeve;
the blocking portion has an outer diameter dimension greater than an outer diameter dimension of the threaded portion so that the blocking portion can abut against the movable sleeve in the first direction.
In one embodiment, when the blocking portion abuts against the movable sleeve along the first direction, the elastic member is configured to provide a target pressing force F,
wherein K is the elastic safety coefficient of the filter element, A is the diameter of one end of the second abutting element abutting against the filter element, B is the small diameter of the annular contact surface of the movable sleeve and the threaded part,for the screw pair equivalent friction angle between the movable sleeve and the screw part +.>For the thread lead angle f of the movable sleeve and the thread part c D, the friction coefficient of the threaded connection of the movable sleeve and the threaded part 2 And the thread pitch diameter T of the movable sleeve and the thread part is the torsion value to be measured, and the value is 1.2 N.m-1.3 N.m.
In one embodiment, the elastic member includes a disc spring.
In one embodiment, the filter element comprises a stop element and a filter element;
the limiting piece is internally provided with a containing cavity, and a first pipeline and a second pipeline which are respectively communicated with two sides of the containing cavity and penetrate through the limiting piece along a first direction of the pressure storage mechanism pointing to the pressing mechanism, wherein the first pipeline is communicated with the first channel, and the second pipeline is communicated with the second channel;
the filter element is arranged in the accommodating cavity.
In one embodiment, the limiting part is further provided with a step hole communicated between the accommodating cavity and the first pipeline;
the aperture of one end of the step hole, which is communicated with the accommodating cavity, is larger than the aperture of the other end of the step hole.
In one embodiment, the limiting member includes a first housing and a second housing, where the second housing is disposed in the first housing from one end of the first housing along the first direction, and defines the accommodating cavity with the first housing;
the first pipeline penetrates through the first shell along the first direction;
the second pipeline penetrates through the second shell along the first direction.
In one embodiment, a first protruding portion is provided at an end of the first housing away from the second housing along the first direction, and an orthographic projection of the first protruding portion on the limiting member falls within a range of the accommodating cavity; and/or
The second shell is provided with a second protruding part along one end of the first shell, which is far away from the first shell, and the orthographic projection of the second protruding part on the limiting piece is in the range of the accommodating cavity.
According to another aspect of the present application, there is provided a design method applied to the filter according to any one of the above embodiments, the design method including:
acquiring a target pressing force of the filter element when the pressing mechanism is positioned at a preset position relative to the pressure storage mechanism;
determining the elasticity of the elastic piece according to the target pressing force;
and determining the model of the elastic piece according to the elastic force of the elastic piece.
In one embodiment, the step of obtaining the target pressing force of the filter element when the pressing mechanism is located at a preset position relative to the pressure storage mechanism includes:
when the movable sleeve is arranged to prop against the blocking part, the pressing mechanism is positioned at a preset position relative to the pressure storage mechanism, and the movable sleeve passes throughCalculating a target pressing force F of the filter element;
wherein K is the elastic safety coefficient of the filter element, the value is 1.1-1.2, A is the diameter of one end of the second abutting element connected with the filter element, B is the small diameter of the annular contact surface of the movable sleeve and the threaded part,for the screw pair equivalent friction angle between the movable sleeve and the screw part +.>For the thread lead angle f of the movable sleeve and the thread part c For screw-connecting the movable sleeve and the screw thread partCoefficient of friction d 2 And the thread pitch diameter T of the movable sleeve and the thread part is the torsion value to be measured, and the value is 1.2 N.m-1.3 N.m.
According to another aspect of the application, there is provided an analyzer comprising a filter according to any of the embodiments described above.
Drawings
FIG. 1 is a cross-sectional view of a filter in accordance with one embodiment of the present application;
FIG. 2 is an exploded view of the filter of the embodiment of FIG. 1;
FIG. 3 is an exploded view of the accumulator mechanism and spring of the embodiment of FIG. 1;
FIG. 4 is a top view of the filter of the embodiment of FIG. 1;
FIG. 5 is a cross-sectional view of the filter element of the embodiment of FIG. 1;
FIG. 6 is an enlarged view of a portion of the embodiment shown in FIG. 5 at A;
FIG. 7 is a flow chart of a design method according to an embodiment of the application.
Reference numerals illustrate:
10. a pressure storage mechanism; 11. a first channel; 12. a fixing seat; 121. a bottom plate; 1211. a bottom wall; 124. a fixed sleeve; 1241. a threaded portion; 1242. a blocking portion; 13. a first abutment; 131. a first shaft section; 132. a second shaft section; 20. a compressing mechanism; 21. a second channel; 22. a movable sleeve; 23. a second abutment; 24. a handle; 241. a connection part; 242. an operation unit; 30. a filter; 31. a limiting piece; 311. a first pipeline; 312. a second pipeline; 313. a step hole; 3131. a first stepped hole; 3132. a second stepped hole; 314. a first through hole; 315. a second through hole; 316. a third through hole; 317. a first housing; 3171. a first portion; 3172. a second portion; 318. a second housing; 32. a filter element; 40. an elastic member; 41. a disc spring; 50. a limit part; 60. a fastener; 70. a shaft sleeve; 80. a first joint; 81. a liquid inlet channel; 90. a second joint; 91. a liquid outlet channel; 100. a first projection; 110. a second projection; A. a first direction.
Detailed Description
In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.
In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Fig. 1 is a cross-sectional view of a filter according to an embodiment of the present application, and fig. 2 is an exploded view of the filter according to the embodiment shown in fig. 1.
Referring to fig. 1-2, a filter according to an embodiment of the present application includes a pressure storage mechanism 10, a pressing mechanism 20, a filter member 30, and an elastic member 40.
The pressure storage mechanism 10 is internally provided with a first channel 11 which penetrates through the pressure storage mechanism 10, the pressing mechanism 20 is movably connected with the pressure storage mechanism 10, and the pressing mechanism 20 is internally provided with a second channel 21 which is communicated with the first channel 11 and penetrates through the pressing mechanism 20. The filter member 30 is provided between the accumulator mechanism 10 and the hold-down mechanism 20 and between the first passage 11 and the second passage 21, and the filter member 30 is used for filtering the fluid flowing from the first passage 11 to the second passage 21. The elastic member 40 is provided in the accumulator mechanism 10, and the elastic member 40 is configured to be able to provide a pressing force for pressing the filter member 30 between the accumulator mechanism 10 and the pressing mechanism 20.
The above filter is constructed such that the first passage 11 in the accumulator mechanism 10 communicates with the second passage 21 in the hold-down mechanism 20, and the filter member 30 is disposed between the first passage 11 and the second passage 21 to filter the fluid flowing from the first passage 11 to the second passage 21 through the filter member 30. By providing the elastic member 40 in the pressure storage mechanism 10, the elastic member 40 provides a pressing force for pressing the filter member 30 between the pressure storage mechanism 10 and the pressing mechanism 20, so that the filter member 30 is brought into close contact with the pressure storage mechanism 10 and the pressing mechanism 20, respectively, thereby preventing leakage of fluid from between the filter member 30 and the pressure storage mechanism 10, or from between the filter member 30 and the pressing mechanism 20. In addition, by arranging the pressing mechanism 20 movably connected with the pressure storage mechanism 10, the position of the pressing mechanism 20 relative to the pressure storage mechanism 10 can be changed, so that the deformation amount of the elastic member 40 arranged in the pressure storage mechanism 10 is changed, namely, the pressing force provided by the elastic member 40 is changed. In this way, in the actual use process, the pressing mechanism 20 is located at a preset position relative to the pressure storage mechanism 10, so that the elastic member 40 provides a target pressing force to press the filter element 30 between the pressure storage mechanism 10 and the pressing mechanism 20, so that leakage of fluid caused by too small pressing force to the filter element 30 is avoided, and damage to the filter element 30 caused by too large pressing force to the filter element 30 is avoided.
In actual use, fluid to be filtered is caused to flow into the end of the first passage 11 remote from the second passage 21, through the filter element 30, into the second passage 21, through the second passage 21 and out of the filter. The fluid flowing out of the filter from the second channel 21 was tested. In order to avoid air bubbles in the fluid, the pressure storage mechanism 10 may be located below the pressing mechanism 20 during actual use, so that when the fluid just enters the first channel 11, the air bubbles in the fluid can float upwards to enter the air above the fluid level, so as to avoid air bubbles remaining in the fluid.
Fig. 3 is an exploded view of the accumulator mechanism and spring of the embodiment of fig. 1.
In some embodiments, as shown in fig. 1 and 3, the pressure storage mechanism 10 includes a fixed seat 12 connected to the pressing mechanism 20, and a first abutment member 13 movably disposed in the fixed seat 12 along a first direction (i.e., a direction a in fig. 1) of the pressure storage mechanism 10 pointing toward the pressing mechanism 20, where the first abutment member 13 abuts against one side of the filter member 30 along the first direction. The first passage 11 penetrates the first abutment 13 in a first direction. The elastic member 40 is disposed between the first abutting member 13 and the fixing base 12 to provide a pressing force for pressing the filter member 30 between the pressure storage mechanism 10 and the pressing mechanism 20. In this way, the first abutting piece 13 is movably arranged in the fixing seat 12 along the first direction and abuts against one side of the filter piece 30 along the first direction, the elastic piece 40 is arranged between the first abutting piece 13 and the fixing seat 12, so that the pressing force of the elastic piece 40 acts on the first abutting piece 13, and the first abutting piece 13 presses the filter piece 30 between the first abutting piece 13 and the pressing mechanism 20, thereby preventing fluid leakage.
Specifically, as shown in fig. 1 and 3, a bottom wall 1211 (see fig. 3) is provided on one side of the fixing base 12 along the first direction, and a limiting portion 50 is protruding from the outer peripheral wall of the first abutment 13, and two ends of the elastic member 40 respectively abut against the bottom wall 1211 and the limiting portion 50.
Alternatively, as shown in fig. 1 and 3, the fixing base 12 includes a bottom plate 121 having a bottom wall 1211, and a fixing sleeve 124 connected to the bottom wall 1211, and the first abutment 13 is disposed through the fixing sleeve 124 and penetrates the bottom plate 121 along the first direction. In one embodiment, the bottom plate 121 and the securing sleeve 124 are removably connected by the fastener 60.
In some embodiments, as shown in fig. 1 and 3, the first abutment 13 includes a first shaft section 131 and a second shaft section 132 disposed along a first direction, the first shaft section 131 movably penetrates through the bottom plate 121, and the limiting portion 50 is disposed on the first shaft section 131. The sleeve 70 is provided with a second shaft section 132 extending through the sleeve 124. In this way, by arranging the shaft sleeve 70, the first abutting piece 13 is slidably connected with the shaft sleeve 70, so that abrasion of the first abutting piece 13 and the fixing seat 12 is reduced, and service lives of the first abutting piece 13 and the fixing seat 12 are prolonged.
Optionally, the sleeve 70 is an interference fit with the anchor block 12.
In one embodiment, as shown in fig. 1, a limiting step hole through which the second shaft section 132 and the limiting portion 50 movably pass is provided in the fixing sleeve 124, and a step surface of the limiting step hole can abut against one side, along the first direction, of the limiting portion 50, which is close to the second shaft section 132, so that the limiting portion 50 is limited, and the first abutting piece 13 is limited in the fixing seat 12, so that the use is convenient. For example, in one embodiment, the hold-down mechanism 20 and the accumulator mechanism 10 are removably connected to enable replacement of the filter element 30. Through setting up spacing portion 50 can with spacing step hole's step face butt, first butt spare 13 can not follow fixing base 12 and drop when making dismouting filter 30, makes convenient operation.
In some embodiments, as shown in connection with fig. 1 and 3, the resilient member 40 includes a disc spring 41. In the practical application, the size of the filter in the first direction is smaller, and accordingly, the size of the first abutment 13 in the first direction is smaller, and the radial size of the first passage 11 is smaller. Therefore, by adopting the disc spring 41, since the disc spring 41 has the advantages of smaller size in the load acting direction and compact axial space, the size of the first abutting piece 13 in the first direction is as small as possible, thereby meeting the actual installation requirement and avoiding the large size of the first abutting piece 13 from causing large processing difficulty of the first channel 11.
It should be understood that other types of springs may be used for the resilient member 40 without limitation, regardless of the size of the filter element.
In some embodiments, as shown in fig. 1, the number of disc springs 41 is plural, and the plurality of disc springs 41 are arranged along the first direction. By providing the plurality of disc springs 41 in this way, the compression amount of the elastic member 40 is increased under the same pre-compression condition, and the control accuracy of the pressing force provided by the elastic member 40 is improved.
Specifically, the target pressing force of the filter element 30 is determined according to parameters such as the material of the filter element 30, and the model of the elastic element 40 is determined according to the target pressing force. For example, the spring coefficient k of the disc spring 41 is determined according to the target pressing force, and a plurality of disc springs 41 each having the spring coefficient k are employed in series as the elastic member 40.
Alternatively, as shown in fig. 1, the first shaft segment 131 is movably disposed through the disc spring 41.
In some embodiments, as shown in fig. 1-2, the pressing mechanism 20 includes a movable sleeve 22 at least partially sleeved outside the fixed base 12, and a second abutment member 23 penetrating the movable sleeve 22 along a first direction, where the second abutment member 23 abuts against a side of the filter 30 away from the first abutment member 13 along the first direction. The second passage 21 penetrates the second abutment 23 in the first direction. In this way, the movable sleeve 22 at least partially sleeved outside the fixed seat 12 is arranged to be connected with the fixed seat 12 and limit the second abutting piece 23, so that the filter piece 30 can be pressed between the first abutting piece 13 and the second abutting piece 23.
Specifically, the movable sleeve 22 is in threaded connection with the fixed seat 12, so that the pressing mechanism 20 can be fixed relative to the pressure storage mechanism 10, the pressing mechanism 20 is reliably connected with the pressure storage mechanism 10 through friction force of threaded connection, loosening is prevented, and detachable connection of the pressing mechanism 20 and the pressure storage mechanism 10 is realized, so that the filter element 30 can be replaced. In addition, through setting up movable sleeve 22 and fixing base 12 threaded connection to can screw up or unscrew movable sleeve 22, realize the accurate adjustment to the position of hold-down mechanism 20 relative to fixing base 12, thereby realize the accurate adjustment to the elastic component 40 deflection, make the size of the hold-down force of elastic component 40 can accurate control.
In the actual use process, the target pressing force of the filter element 30 when the pressing mechanism 20 is located at the preset position relative to the pressure storage mechanism 10 can be obtained in advance through parameters such as the material of the filter element 30, and then the model of the elastic element 40 is determined through the target pressing force. In this way, during the assembly process of the pressing mechanism 20 and the pressure storage mechanism 10, only the pressing mechanism 20 is screwed to the preset position, and the elastic force of the elastic member 40 reaches the target pressing force. It will be appreciated that the target compression force is a compression force that will cause the filter element 30 to be sealingly connected to the compression mechanism 20 and the accumulator mechanism 10, respectively, and that will not cause damage to the filter element 30.
To enable the pressing mechanism 20 to be accurately located at the preset position, in some embodiments, as shown in fig. 1, the fixing base 12 includes a threaded portion 1241 penetrating the movable sleeve 22 and a blocking portion 1242 connected to the threaded portion 1241. The threaded portion 1241 is threadedly coupled to the movable sleeve 22, and the blocking portion 1242 has an outer diameter greater than an outer diameter of the threaded portion 1241 such that the blocking portion 1242 can abut the movable sleeve 22 in the first direction. In this way, the screw part 1241 is provided to enable the fixing seat 12 to be in threaded connection with the movable sleeve 22, and the blocking part 1242 is provided to enable the blocking part 1242 to be abutted against the movable sleeve 22, so that the compressing mechanism 20 is limited, and the position of the compressing mechanism 20 relative to the pressure storage mechanism 10 can be accurately determined, so that the compressing mechanism has an in-place effect. For example, the preset position of the pressing mechanism 20 with respect to the accumulator mechanism 10 may be set as the position of the pressing mechanism 20 when the movable sleeve 22 abuts against the blocking part 1242, and the target pressing force of the filter element 30 at the preset position may be calculated. In the actual use process, when the movable sleeve 22 is screwed up to be abutted with the blocking part 1242, the filter element 30 is pressed between the pressing mechanism 20 and the pressure storage mechanism 10 under the action of the target pressing force, so that the effective sealing is realized, and the filter element 30 can be prevented from being damaged due to excessive pressing of the movable sleeve 22, so that the operation is convenient.
Specifically, as shown in fig. 3, the fixing base 12 includes a base plate 121 and a fixing sleeve 124 connected to the base plate 121, and the fixing sleeve 124 includes a threaded portion 1241 and a blocking portion 1242.
In some embodiments, the pressing mechanism 20 is positioned at a predetermined position (see fig. 1) relative to the pressure storage mechanism 10 when the movable sleeve 22 is disposed against the blocking portion 1242 byThe target pressing force F of the filter 30 is calculated. Wherein K is the elastic safety coefficient of the filter element 30, the value is 1.1-1.2, A is the diameter of one end of the second abutting element 23 abutting against the filter element 30, B is the small diameter of the annular contact surface of the movable sleeve 22 and the threaded part 1241, and B is the diameter of the annular contact surface of the movable sleeve>For the screw pair equivalent friction angle between the movable sleeve 22 and the screw part 1241 +.>Is the thread lead angle, f, of the movable sleeve 22 and the threaded portion 1241 c Is a movable sleeve22 and the coefficient of friction, d, of the threaded connection of the threaded portion 1241 2 The thread pitch diameter T of the movable sleeve 22 and the thread part 1241 is the torque value to be measured, and the value is 1.2 N.m-1.3 N.m. In this way, by adopting the above formula for calculating the target pressing force F, when the structural parameters of the components of the filter are changed under the condition that the connection mode and the working condition of the components of the filter are fixed, the target pressing force F can be calculated by substituting the structural parameters of the components into the above formula. And since the pressing force to the filter element 30 is provided by the elastic force of the elastic element 40, the model of the elastic element 40 can be determined according to the target pressing force F and the pre-pressing force of the elastic element 40, so that when the structural parameters adopted by each component of the filter are changed, the parameters of the elastic element 40 can be set according to the calculation result of the formula, and the elastic element 40 is matched with other components of the filter. For example, the model of the disc spring 41 can be determined by the target pressing force F and the pre-pressing force of the disc spring 41.
Specifically, a non-elastic member is used to replace the elastic member 40 and is disposed between the first abutment member 13 and the fixed seat 12, and the torque applied to the movable sleeve 22 when the movable sleeve 22 is screwed up against the blocking portion 1242 is measured as the torque value T to be measured.
Alternatively, the elastic member 40 includes a plurality of disc springs 41 connected in series, and the disc springs 41 are preloaded by 10% to 25%. In this way, by providing the disc springs 41 with a preload of 10% to 25%, gaps between adjacent disc springs 41 are eliminated, and the accuracy of the elastic force provided by all the disc springs 41 in common is improved, thereby improving the sealing reliability of the filter 30.
Fig. 4 is a top view of the filter of the embodiment of fig. 1.
To facilitate tightening or loosening of the compression mechanism 20, in some embodiments, the compression mechanism 20 further includes a handle 24 provided on the outer periphery of the movable sleeve 22 to increase torque as the compression mechanism 20 is screwed.
In one embodiment, as shown in connection with fig. 1-2 and 4, the handle 24 includes a connecting portion 241 sleeved outside the movable sleeve 22, and two operating portions 242 protruding from the outer periphery of the connecting portion 241. In the actual use process, the operation portion 242 can be held to rotate the connection portion 241, so as to drive the movable sleeve 22 connected with the connection portion 241 to rotate along with the connection portion 241 relative to the fixed base 12. In other embodiments, the handle 24 may be configured in other ways, as long as the torque can be increased, and the present application is not limited thereto.
In some embodiments, as shown in fig. 1-2, the filter further includes a first connector 80 and a second connector 90, the first connector 80 is disposed through an end of the first abutting element 13 away from the filter element 30 along the first direction, a liquid inlet channel 81 communicating with the first channel 11 is disposed in the first connector 80, the second connector 90 is disposed through an end of the second abutting element 23 away from the filter element 30 along the first direction, and a liquid outlet channel 91 communicating with the second channel 21 is disposed in the second connector 90. Thus, by providing the first connector 80 and the second connector 90, the filter can be easily connected to other devices.
Fig. 5 is a cross-sectional view of the filter element of the embodiment of fig. 1.
In some embodiments, as shown in connection with fig. 1 and 5, the filter element 30 includes a stop 31 and a filter element 32. The limiting piece 31 is internally provided with a containing cavity, and a first pipeline 311 and a second pipeline 312 which are respectively communicated with two sides of the containing cavity and penetrate through the limiting piece 31 along a first direction, wherein the first pipeline 311 is communicated with the first channel 11, and the second pipeline 312 is communicated with the second channel 21. The filter element 32 is disposed within the receiving chamber. Thus, by providing the stopper 31 to limit the filter element 32 to the receiving chamber, the fluid flowing from the first passage 11 into the first pipe 311 is filtered, and the filtered fluid flows into the second passage 21 through the second pipe 312. In addition, the limiting member 31 is provided to provide protection for the filter element 32, and to prevent the filter element 32 from being contaminated when the filter element 30 is taken or attached or detached.
Specifically, as shown in fig. 5, the filter element 32 includes a plurality of filter membranes disposed along a first direction.
In order to increase the filtering efficiency of the filter element 32, in some embodiments, as shown in fig. 5, a stepped hole 313 is further disposed in the limiting member 31, and the stepped hole 313 communicates with the space between the receiving cavity and the first pipeline 311, and the hole diameter at one end of the stepped hole 313 communicating with the receiving cavity is larger than the hole diameter at the other end of the stepped hole 313. In this way, by providing the stepped hole 313, the contact area between the fluid and the side of the filter element 32 close to the first pipe 311 is increased, so that the filtering efficiency of the filter element 32 is improved.
Specifically, as shown in fig. 5, the stepped hole 313 includes a first stepped hole 3131 and a second stepped hole 3132 that are sequentially provided in the first direction, the first stepped hole 3131 communicates with the first pipe 311, the second stepped hole 3132 communicates with the accommodation chamber, and the aperture of the first stepped hole 3131 is smaller than that of the second stepped hole 3132. In this way, by providing the second stepped hole 3132, the contact area between the fluid and the side of the filter element 32 close to the second stepped hole 3132 is increased, and the filtering efficiency is improved. Through setting up the first step hole 3131 that the aperture is less than the aperture of second step hole 3132, make second step hole 3132 along the wall that first direction and filter core 32 are relative can with filter core 32 contact to it is spacing to filter core 32, in order to avoid the excessive influence fluid flow of deflection in filter core 32 middle part and filter effect.
Further, as shown in fig. 5, a first through hole 314 is further provided in the limiting member 31, and the first through hole 314 is communicated between the accommodating cavity and the second pipeline 312, and the aperture of one end of the first through hole 314, which is communicated with the accommodating cavity, is larger than the aperture of the other end of the first through hole 314, so as to increase the contact area between the side of the filter element 32, which is close to the second pipeline 312, and the fluid, and improve the filtering efficiency.
In one embodiment, as shown in fig. 5, the aperture of the first through hole 314 gradually decreases from one end of the first through hole 314 communicating with the receiving cavity to the other end of the first through hole 314.
In some embodiments, as shown in fig. 5, the limiting member 31 includes a first housing 317 and a second housing 318, and the second housing 318 is disposed through the first housing 317 from one end of the first housing 317 along the first direction, and defines a receiving cavity with the first housing 317. The first conduit 311 extends through the first housing 317 in a first direction, and the second conduit 312 extends through the second housing 318 in the first direction. Thus, by providing the first housing 317 and the second housing 318, the cartridge 32 is facilitated to be assembled into the retainer 31 during the manufacturing assembly of the filter element 30. For example, the filter element 32 may be first installed in the first housing 317, and then the second housing 318 may be installed with the first housing 317.
Optionally, the first housing 317 is interference fit with the second housing 318 to make the connection of the first housing 317 with the second housing 318 reliable. During actual use, the filter element 30 is replaced as a whole.
Specifically, the stepped hole 313 is provided in the first housing 317, and the first through hole 314 is provided in the second housing 318.
In some embodiments, as shown in fig. 1 and 5, a second through hole 315 is further disposed in the first housing 317 and is connected between the first channel 11 and the first pipeline 311, and an aperture of an end of the second through hole 315 connected with the first channel 11 is larger than an aperture of the other end of the second through hole 315. The second housing 318 is further provided therein with a third through hole 316 communicating between the second passage 21 and the second pipe 312, and the aperture of one end of the third through hole 316 communicating with the second passage 21 is larger than the aperture of the other end of the third through hole 316. It should be noted that, since the filter 30 is detachably disposed, the second through hole 315 and the third through hole 316 are disposed to align with the first channel 11 and the second channel 21, respectively, so as to reduce the influence of the assembly accuracy on the alignment.
In some embodiments, as shown in connection with fig. 1 and 5, the first housing 317 includes a first portion 3171 and a second portion 3172 disposed along a first direction, the first portion 3171 at least partially disposed within the first abutment 13 along the first direction, and the second portion 3172 at least partially disposed within the second abutment 23 along the first direction. In this way, the first portion 3171 and the second portion 3172 are positioned in the first abutting piece 13 and the second abutting piece 23, respectively, so that the mounting position of the filter 30 is accurate.
Optionally, as shown in fig. 5, the outer diameter of the first portion 3171 is greater than the outer diameter of the second portion 3172 to increase the overall structural rigidity of the filter element 30 and the smoothness of placement of the filter element 30 on the first abutment 13 (see fig. 1).
In some embodiments, second portion 3172 is in transition fit with second abutment 23 to increase the strength of the outer periphery of filter 30.
Further, the dimension of the mating portion of the second portion 3172 and the second abutment 23 in the first direction is H, and the dimension of the first housing 317 in the first direction is H.gtoreq.3H/4. In this way, the strength of the first housing 317 is increased to protect the first housing 317.
Specifically, the second abutment 23 is in clearance fit with the movable sleeve 22 to avoid the second abutment 23 obstructing the movement of the movable sleeve 22 when screwing or unscrewing the movable sleeve 22 to the fixed seat 12.
In actual use, after the filter element 30 is used for a certain period of time, the movable sleeve 22 is removed from the fixed seat 12 by rotating the handle 24, and the second abutment element 23 is removed, so that the filter element 30 is replaced.
Fig. 6 is a partial enlarged view at a in the embodiment shown in fig. 5.
In some embodiments, as shown in connection with fig. 5-6, the first housing 317 is provided with the first protrusion 100 at an end far from the second housing 318 in the first direction, and the orthographic projection of the first protrusion 100 on the limiting member 31 falls within the range of the accommodating cavity. In this way, by providing the first projection 100 to compensate for the seal compression amount, the sealability between the filter element 30 and the pressure storage mechanism 10, the pressing mechanism 20 is further improved.
In one embodiment, the dimension of the first protruding portion 100 in the first direction is D, and 0.02mm is less than or equal to D is less than or equal to 0.1mm, so as to conform to the deformation amount of the first housing 317 under the target pressing force, so that the first protruding portion 100 and the first housing 317 do not form a step surface during actual use.
In some embodiments, as shown in fig. 5, an end of the second housing 318 away from the first housing 317 in the first direction is provided with a second protruding portion 110, and an orthographic projection of the second protruding portion 110 on the limiting member 31 falls within a range of the accommodating cavity, so as to further compensate for the sealing compression amount and further improve the sealing performance.
FIG. 7 is a flow chart of a design method according to an embodiment of the application.
As shown in fig. 7, the present application further provides a design method applied to the filter described in any one of the foregoing embodiments, where the design method includes:
s110: the target pressing force of the filter element 30 is obtained when the pressing mechanism 20 is located at a preset position with respect to the accumulator mechanism 10.
Specifically, when the movable sleeve 22 is arranged against the blocking part 1242, the pressing mechanism 20 is located at a preset position relative to the pressure storage mechanism 10, byThe target pressing force F of the filter 30 is calculated. Wherein K is the elastic safety coefficient of the filter element 30, the value is 1.1-1.2, A is the diameter of one end of the second abutting element 23 connected with the filter element 30, B is the small diameter of the annular contact surface of the movable sleeve 22 and the threaded part 1241>For the screw pair equivalent friction angle between the movable sleeve 22 and the screw part 1241 +.>Is the thread lead angle, f, of the movable sleeve 22 and the threaded portion 1241 c The friction coefficient, d, of the threaded connection of the movable sleeve 22 and the threaded portion 1241 2 The thread pitch diameter T of the movable sleeve 22 and the thread part 1241 is the torque value to be measured, and the value is 1.2 N.m-1.3 N.m.
Specifically, a non-elastic member is used to replace the elastic member 40 and is disposed between the first abutment member 13 and the fixed seat 12, and the torque applied to the movable sleeve 22 when the movable sleeve 22 is screwed up against the blocking portion 1242 is measured as the torque value T to be measured.
S120: the elastic force of the elastic member 40 is determined according to the target pressing force.
It should be noted that, the pressing force on the filter element 30 is provided by the elastic force of the elastic element 40, so when the pressing mechanism 20 is located at the preset position relative to the pressure storing mechanism 10, that is, the movable sleeve 22 abuts against the blocking portion 1242, the elastic force of the elastic element 40 is equal to the target pressing force.
S130: the type of the elastic member 40 is determined according to the elastic force of the elastic member 40.
Specifically, the present application relates to a method for manufacturing a semiconductor device. The model of the disc spring 41 can be determined by the target pressing force F and the pre-pressing force of the disc spring 41.
In one embodiment, the elastic member 40 includes a plurality of disc springs 41, and the elastic coefficient k of the disc springs 41 is determined by the target pressing force F and the pre-pressing force of the disc springs 41, and the disc springs 41 are pre-pressed by 10% to 25%. In this way, by providing the disc springs 41 with a preload of 10% to 25%, gaps between adjacent disc springs 41 are eliminated, and the accuracy of the elastic force provided by all the disc springs 41 in common is improved, thereby improving the sealing reliability of the filter 30.
Therefore, in the above design method, the elastic force of the elastic member 40 is determined by the calculated target pressing force, and the model of the elastic member 40 is determined according to the elastic force of the elastic member 40, thereby realizing accurate control of the elastic force of the elastic member 40. In practical use, the elastic member 40 can provide the target pressing force only by positioning the pressing mechanism 20 at the preset position relative to the pressure storage mechanism 10, so that the effective sealing of the filter element 30 is realized, and the filter element 30 is prevented from being damaged due to excessive pressing of the movable sleeve 22.
According to another aspect of the application, there is provided an analyzer comprising a filter according to any of the embodiments described above.
Alternatively, the analyzer may be a glycosylated hemoglobin analyzer.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (12)

1. A filter, comprising:
the pressure storage mechanism comprises a fixed seat and a first abutting piece movably penetrating into the fixed seat along a first direction, and a first channel penetrating through the first abutting piece is arranged in the first abutting piece;
the compressing mechanism is arranged on one side of the pressure storage mechanism along the first direction and is movably connected with the fixing seat, and a second channel which is communicated with the first channel and penetrates through the compressing mechanism is arranged in the compressing mechanism;
the filter piece is arranged between the first abutting piece and the pressing mechanism, the first abutting piece abuts against one side of the filter piece along the first direction, and the filter piece is positioned between the first channel and the second channel and used for filtering fluid flowing from the first channel to the second channel; and
the elastic piece is arranged in the pressure storage mechanism and between the first abutting piece and the fixing seat, and the elastic piece is configured to provide a pressing force for pressing the filter piece between the pressure storage mechanism and the pressing mechanism.
2. The filter according to claim 1, wherein the pressing mechanism comprises a movable sleeve at least partially sleeved outside the fixed seat, and a second abutting piece penetrating through the movable sleeve along the first direction, and the second abutting piece abuts against one side, away from the first abutting piece, of the filter piece along the first direction;
the second passage penetrates the second abutment in the first direction.
3. The filter of claim 2, wherein the fixed seat comprises a threaded portion penetrating into the movable sleeve and a blocking portion connected to the threaded portion;
the thread part is in threaded connection with the movable sleeve;
the blocking portion has an outer diameter dimension greater than an outer diameter dimension of the threaded portion so that the blocking portion can abut against the movable sleeve in the first direction.
4. The filter of claim 3, wherein the resilient member is configured to provide a target hold-down force F when the blocking portion abuts the movable sleeve in the first direction,
wherein K is the elastic safety coefficient of the filter element, A is the diameter of one end of the second abutting element abutting against the filter element, B is the small diameter of the annular contact surface of the movable sleeve and the threaded part,for the screw pair equivalent friction angle between the movable sleeve and the screw part +.>For the thread lead angle f of the movable sleeve and the thread part c D, the friction coefficient of the threaded connection of the movable sleeve and the threaded part 2 And the thread pitch diameter T of the movable sleeve and the thread part is the torsion value to be measured, and the value is 1.2 N.m-1.3 N.m.
5. The filter of claim 1, wherein the resilient member comprises a disc spring.
6. The filter of claim 1, wherein the filter element comprises a stop element and a filter cartridge;
the limiting piece is internally provided with a containing cavity, and a first pipeline and a second pipeline which are respectively communicated with two sides of the containing cavity and penetrate through the limiting piece along a first direction of the pressure storage mechanism pointing to the pressing mechanism, wherein the first pipeline is communicated with the first channel, and the second pipeline is communicated with the second channel;
the filter element is arranged in the accommodating cavity.
7. The filter of claim 6, wherein the retainer further has a stepped bore therein communicating between the receiving chamber and the first conduit;
the aperture of one end of the step hole, which is communicated with the accommodating cavity, is larger than the aperture of the other end of the step hole.
8. The filter of claim 6, wherein the retainer comprises a first housing and a second housing, the second housing extending from an end of the first housing in the first direction into the first housing and defining the receiving chamber with the first housing;
the first pipeline penetrates through the first shell along the first direction;
the second pipeline penetrates through the second shell along the first direction.
9. The filter of claim 8, wherein the first housing has a first projection at an end thereof remote from the second housing in the first direction, and an orthographic projection of the first projection on the stopper falls within the range of the accommodating chamber; and/or
The second shell is provided with a second protruding part along one end of the first shell, which is far away from the first shell, and the orthographic projection of the second protruding part on the limiting piece is in the range of the accommodating cavity.
10. A design method applied to the filter according to any one of claims 1 to 9, the design method comprising:
acquiring a target pressing force of the filter element when the pressing mechanism is positioned at a preset position relative to the pressure storage mechanism;
determining the elasticity of the elastic piece according to the target pressing force;
and determining the model of the elastic piece according to the elastic force of the elastic piece.
11. The method of claim 10, wherein the step of obtaining the target pressing force of the filter element when the pressing mechanism is located at the preset position with respect to the pressure storage mechanism comprises:
setting movable sleeve and blockingWhen the parts are propped against each other, the pressing mechanism is positioned at a preset position relative to the pressure storage mechanism and passes throughCalculating a target pressing force F of the filter element;
wherein K is the elastic safety coefficient of the filter element, the value is 1.1-1.2, A is the diameter of one end of the second abutting element connected with the filter element, B is the small diameter of the annular contact surface of the movable sleeve and the threaded part,for the screw pair equivalent friction angle between the movable sleeve and the screw part +.>For the thread lead angle f of the movable sleeve and the thread part c D, the friction coefficient of the threaded connection of the movable sleeve and the threaded part 2 And the thread pitch diameter T of the movable sleeve and the thread part is the torsion value to be measured, and the value is 1.2 N.m-1.3 N.m.
12. An analyser comprising a filter according to any one of claims 1 to 9.
CN202211031477.7A 2022-08-26 2022-08-26 Filter, design method thereof and analyzer Active CN115400485B (en)

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CA2776114A1 (en) * 2011-05-03 2012-11-03 Michael E. Cofini Fluid filter assembly with sight glass
CN204073715U (en) * 2014-09-30 2015-01-07 苏州安泰空气技术有限公司 There is the pressing mechanism of high-efficiency air filter of compensate function
EP2854986A1 (en) * 2012-05-31 2015-04-08 Mahle International GmbH Filter device
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CN107261686A (en) * 2017-06-21 2017-10-20 利辛县飞达网业有限公司 A kind of air cleaner
CN111115869A (en) * 2018-10-31 2020-05-08 佛山市顺德区美的饮水机制造有限公司 Composite filter element assembly
CN113639075A (en) * 2021-08-06 2021-11-12 江苏圣泰阀门有限公司 Pressure seal piston valve cover lifting check valve
CN216825102U (en) * 2022-03-16 2022-06-28 佛山市桐立新材料科技有限公司 Filtering device
CN216934443U (en) * 2021-12-08 2022-07-12 上海宏创医疗科技有限公司 Connector for clamping catheter
CN217188320U (en) * 2022-04-12 2022-08-16 宁波灏钻科技有限公司 Water-stopping structure of water path plate

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2776114A1 (en) * 2011-05-03 2012-11-03 Michael E. Cofini Fluid filter assembly with sight glass
EP2854986A1 (en) * 2012-05-31 2015-04-08 Mahle International GmbH Filter device
EP3027291A1 (en) * 2013-08-04 2016-06-08 Tavlit Plastics Ltd. Self cleaning disc filter apparatus
CN204073715U (en) * 2014-09-30 2015-01-07 苏州安泰空气技术有限公司 There is the pressing mechanism of high-efficiency air filter of compensate function
CN107261686A (en) * 2017-06-21 2017-10-20 利辛县飞达网业有限公司 A kind of air cleaner
CN111115869A (en) * 2018-10-31 2020-05-08 佛山市顺德区美的饮水机制造有限公司 Composite filter element assembly
CN113639075A (en) * 2021-08-06 2021-11-12 江苏圣泰阀门有限公司 Pressure seal piston valve cover lifting check valve
CN216934443U (en) * 2021-12-08 2022-07-12 上海宏创医疗科技有限公司 Connector for clamping catheter
CN216825102U (en) * 2022-03-16 2022-06-28 佛山市桐立新材料科技有限公司 Filtering device
CN217188320U (en) * 2022-04-12 2022-08-16 宁波灏钻科技有限公司 Water-stopping structure of water path plate

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